Merge pull request #14885 from karalabe/trezor-boom

accounts, console, internal: support trezor hardware wallet

41 files changed, 17523 insertions, 1018 deletions

diff --git a/accounts/accounts.go b/accounts/accounts.go
index 640de5220..76951e1a4 100644
--- a/accounts/accounts.go
+++ b/accounts/accounts.go
@@ -42,8 +42,9 @@ type Wallet interface {
 	URL() URL
 
 	// Status returns a textual status to aid the user in the current state of the
-	// wallet.
-	Status() string
+	// wallet. It also returns an error indicating any failure the wallet might have
+	// encountered.
+	Status() (string, error)
 
 	// Open initializes access to a wallet instance. It is not meant to unlock or
 	// decrypt account keys, rather simply to establish a connection to hardware
@@ -147,9 +148,26 @@ type Backend interface {
 	Subscribe(sink chan<- WalletEvent) event.Subscription
 }
 
+// WalletEventType represents the different event types that can be fired by
+// the wallet subscription subsystem.
+type WalletEventType int
+
+const (
+	// WalletArrived is fired when a new wallet is detected either via USB or via
+	// a filesystem event in the keystore.
+	WalletArrived WalletEventType = iota
+
+	// WalletOpened is fired when a wallet is successfully opened with the purpose
+	// of starting any background processes such as automatic key derivation.
+	WalletOpened
+
+	// WalletDropped
+	WalletDropped
+)
+
 // WalletEvent is an event fired by an account backend when a wallet arrival or
 // departure is detected.
 type WalletEvent struct {
-	Wallet Wallet // Wallet instance arrived or departed
-	Arrive bool   // Whether the wallet was added or removed
+	Wallet Wallet          // Wallet instance arrived or departed
+	Kind   WalletEventType // Event type that happened in the system
 }
diff --git a/accounts/hd.go b/accounts/hd.go
index e8bc191af..277f688e4 100644
--- a/accounts/hd.go
+++ b/accounts/hd.go
@@ -27,12 +27,17 @@ import (
 // DefaultRootDerivationPath is the root path to which custom derivation endpoints
 // are appended. As such, the first account will be at m/44'/60'/0'/0, the second
 // at m/44'/60'/0'/1, etc.
-var DefaultRootDerivationPath = DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0}
+var DefaultRootDerivationPath = DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}
 
 // DefaultBaseDerivationPath is the base path from which custom derivation endpoints
 // are incremented. As such, the first account will be at m/44'/60'/0'/0, the second
 // at m/44'/60'/0'/1, etc.
-var DefaultBaseDerivationPath = DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}
+var DefaultBaseDerivationPath = DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0}
+
+// DefaultLedgerBaseDerivationPath is the base path from which custom derivation endpoints
+// are incremented. As such, the first account will be at m/44'/60'/0'/0, the second
+// at m/44'/60'/0'/1, etc.
+var DefaultLedgerBaseDerivationPath = DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}
 
 // DerivationPath represents the computer friendly version of a hierarchical
 // deterministic wallet account derivaion path.
diff --git a/accounts/hd_test.go b/accounts/hd_test.go
index 83ec34adb..b6b23230d 100644
--- a/accounts/hd_test.go
+++ b/accounts/hd_test.go
@@ -37,11 +37,11 @@ func TestHDPathParsing(t *testing.T) {
 		{"m/2147483692/2147483708/2147483648/2147483648", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 0}},
 
 		// Plain relative derivation paths
-		{"0", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}},
-		{"128", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 128}},
-		{"0'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 0}},
-		{"128'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 128}},
-		{"2147483648", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 0}},
+		{"0", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0}},
+		{"128", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 128}},
+		{"0'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0x80000000 + 0}},
+		{"128'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0x80000000 + 128}},
+		{"2147483648", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0x80000000 + 0}},
 
 		// Hexadecimal absolute derivation paths
 		{"m/0x2C'/0x3c'/0x00'/0x00", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}},
@@ -52,11 +52,11 @@ func TestHDPathParsing(t *testing.T) {
 		{"m/0x8000002C/0x8000003c/0x80000000/0x80000000", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 0}},
 
 		// Hexadecimal relative derivation paths
-		{"0x00", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}},
-		{"0x80", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 128}},
-		{"0x00'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 0}},
-		{"0x80'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 128}},
-		{"0x80000000", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0x80000000 + 0}},
+		{"0x00", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0}},
+		{"0x80", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 128}},
+		{"0x00'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0x80000000 + 0}},
+		{"0x80'", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0x80000000 + 128}},
+		{"0x80000000", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0, 0x80000000 + 0}},
 
 		// Weird inputs just to ensure they work
 		{"	m  /   44			'\n/\n   60	\n\n\t'   /\n0 ' /\t\t	0", DerivationPath{0x80000000 + 44, 0x80000000 + 60, 0x80000000 + 0, 0}},
diff --git a/accounts/keystore/keystore.go b/accounts/keystore/keystore.go
index 9df7f2dd9..80ccd3741 100644
--- a/accounts/keystore/keystore.go
+++ b/accounts/keystore/keystore.go
@@ -143,14 +143,14 @@ func (ks *KeyStore) refreshWallets() {
 	for _, account := range accs {
 		// Drop wallets while they were in front of the next account
 		for len(ks.wallets) > 0 && ks.wallets[0].URL().Cmp(account.URL) < 0 {
-			events = append(events, accounts.WalletEvent{Wallet: ks.wallets[0], Arrive: false})
+			events = append(events, accounts.WalletEvent{Wallet: ks.wallets[0], Kind: accounts.WalletDropped})
 			ks.wallets = ks.wallets[1:]
 		}
 		// If there are no more wallets or the account is before the next, wrap new wallet
 		if len(ks.wallets) == 0 || ks.wallets[0].URL().Cmp(account.URL) > 0 {
 			wallet := &keystoreWallet{account: account, keystore: ks}
 
-			events = append(events, accounts.WalletEvent{Wallet: wallet, Arrive: true})
+			events = append(events, accounts.WalletEvent{Wallet: wallet, Kind: accounts.WalletArrived})
 			wallets = append(wallets, wallet)
 			continue
 		}
@@ -163,7 +163,7 @@ func (ks *KeyStore) refreshWallets() {
 	}
 	// Drop any leftover wallets and set the new batch
 	for _, wallet := range ks.wallets {
-		events = append(events, accounts.WalletEvent{Wallet: wallet, Arrive: false})
+		events = append(events, accounts.WalletEvent{Wallet: wallet, Kind: accounts.WalletDropped})
 	}
 	ks.wallets = wallets
 	ks.mu.Unlock()
diff --git a/accounts/keystore/keystore_test.go b/accounts/keystore/keystore_test.go
index 5d89a4dbb..132b74439 100644
--- a/accounts/keystore/keystore_test.go
+++ b/accounts/keystore/keystore_test.go
@@ -296,8 +296,8 @@ func TestWalletNotifications(t *testing.T) {
 			}
 			select {
 			case event := <-updates:
-				if !event.Arrive {
-					t.Errorf("departure event on account creation")
+				if event.Kind != accounts.WalletArrived {
+					t.Errorf("non-arrival event on account creation")
 				}
 				if event.Wallet.Accounts()[0] != account {
 					t.Errorf("account mismatch on created wallet: have %v, want %v", event.Wallet.Accounts()[0], account)
@@ -319,8 +319,8 @@ func TestWalletNotifications(t *testing.T) {
 			}
 			select {
 			case event := <-updates:
-				if event.Arrive {
-					t.Errorf("arrival event on account deletion")
+				if event.Kind != accounts.WalletDropped {
+					t.Errorf("non-drop event on account deletion")
 				}
 				if event.Wallet.Accounts()[0] != account {
 					t.Errorf("account mismatch on deleted wallet: have %v, want %v", event.Wallet.Accounts()[0], account)
diff --git a/accounts/keystore/keystore_wallet.go b/accounts/keystore/keystore_wallet.go
index 7165d2821..758fdfe36 100644
--- a/accounts/keystore/keystore_wallet.go
+++ b/accounts/keystore/keystore_wallet.go
@@ -36,16 +36,16 @@ func (w *keystoreWallet) URL() accounts.URL {
 	return w.account.URL
 }
 
-// Status implements accounts.Wallet, always returning "open", since there is no
-// concept of open/close for plain keystore accounts.
-func (w *keystoreWallet) Status() string {
+// Status implements accounts.Wallet, returning whether the account held by the
+// keystore wallet is unlocked or not.
+func (w *keystoreWallet) Status() (string, error) {
 	w.keystore.mu.RLock()
 	defer w.keystore.mu.RUnlock()
 
 	if _, ok := w.keystore.unlocked[w.account.Address]; ok {
-		return "Unlocked"
+		return "Unlocked", nil
 	}
-	return "Locked"
+	return "Locked", nil
 }
 
 // Open implements accounts.Wallet, but is a noop for plain wallets since there
diff --git a/accounts/manager.go b/accounts/manager.go
index 12a5bfcd9..78ddb1368 100644
--- a/accounts/manager.go
+++ b/accounts/manager.go
@@ -96,9 +96,10 @@ func (am *Manager) update() {
 		case event := <-am.updates:
 			// Wallet event arrived, update local cache
 			am.lock.Lock()
-			if event.Arrive {
+			switch event.Kind {
+			case WalletArrived:
 				am.wallets = merge(am.wallets, event.Wallet)
-			} else {
+			case WalletDropped:
 				am.wallets = drop(am.wallets, event.Wallet)
 			}
 			am.lock.Unlock()
diff --git a/accounts/usbwallet/ledger_hub.go b/accounts/usbwallet/hub.go
index 2b0d56097..7069d2531 100644
--- a/accounts/usbwallet/ledger_hub.go
+++ b/accounts/usbwallet/hub.go
@@ -14,10 +14,6 @@
 // You should have received a copy of the GNU Lesser General Public License
 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
 
-// This file contains the implementation for interacting with the Ledger hardware
-// wallets. The wire protocol spec can be found in the Ledger Blue GitHub repo:
-// https://raw.githubusercontent.com/LedgerHQ/blue-app-eth/master/doc/ethapp.asc
-
 package usbwallet
 
 import (
@@ -33,24 +29,28 @@ import (
 )
 
 // LedgerScheme is the protocol scheme prefixing account and wallet URLs.
-var LedgerScheme = "ledger"
+const LedgerScheme = "ledger"
 
-// ledgerDeviceIDs are the known device IDs that Ledger wallets use.
-var ledgerDeviceIDs = []deviceID{
-	{Vendor: 0x2c97, Product: 0x0000}, // Ledger Blue
-	{Vendor: 0x2c97, Product: 0x0001}, // Ledger Nano S
-}
+// TrezorScheme is the protocol scheme prefixing account and wallet URLs.
+const TrezorScheme = "trezor"
+
+// refreshCycle is the maximum time between wallet refreshes (if USB hotplug
+// notifications don't work).
+const refreshCycle = time.Second
 
-// Maximum time between wallet refreshes (if USB hotplug notifications don't work).
-const ledgerRefreshCycle = time.Second
+// refreshThrottling is the minimum time between wallet refreshes to avoid USB
+// trashing.
+const refreshThrottling = 500 * time.Millisecond
 
-// Minimum time between wallet refreshes to avoid USB trashing.
-const ledgerRefreshThrottling = 500 * time.Millisecond
+// Hub is a accounts.Backend that can find and handle generic USB hardware wallets.
+type Hub struct {
+	scheme     string                  // Protocol scheme prefixing account and wallet URLs.
+	vendorID   uint16                  // USB vendor identifier used for device discovery
+	productIDs []uint16                // USB product identifiers used for device discovery
+	makeDriver func(log.Logger) driver // Factory method to construct a vendor specific driver
 
-// LedgerHub is a accounts.Backend that can find and handle Ledger hardware wallets.
-type LedgerHub struct {
 	refreshed   time.Time               // Time instance when the list of wallets was last refreshed
-	wallets     []accounts.Wallet       // List of Ledger devices currently tracking
+	wallets     []accounts.Wallet       // List of USB wallet devices currently tracking
 	updateFeed  event.Feed              // Event feed to notify wallet additions/removals
 	updateScope event.SubscriptionScope // Subscription scope tracking current live listeners
 	updating    bool                    // Whether the event notification loop is running
@@ -65,20 +65,34 @@ type LedgerHub struct {
 }
 
 // NewLedgerHub creates a new hardware wallet manager for Ledger devices.
-func NewLedgerHub() (*LedgerHub, error) {
+func NewLedgerHub() (*Hub, error) {
+	return newHub(LedgerScheme, 0x2c97, []uint16{0x0000 /* Ledger Blue */, 0x0001 /* Ledger Nano S */}, newLedgerDriver)
+}
+
+// NewTrezorHub creates a new hardware wallet manager for Trezor devices.
+func NewTrezorHub() (*Hub, error) {
+	return newHub(TrezorScheme, 0x534c, []uint16{0x0001 /* Trezor 1 */}, newTrezorDriver)
+}
+
+// newHub creates a new hardware wallet manager for generic USB devices.
+func newHub(scheme string, vendorID uint16, productIDs []uint16, makeDriver func(log.Logger) driver) (*Hub, error) {
 	if !hid.Supported() {
 		return nil, errors.New("unsupported platform")
 	}
-	hub := &LedgerHub{
-		quit: make(chan chan error),
+	hub := &Hub{
+		scheme:     scheme,
+		vendorID:   vendorID,
+		productIDs: productIDs,
+		makeDriver: makeDriver,
+		quit:       make(chan chan error),
 	}
 	hub.refreshWallets()
 	return hub, nil
 }
 
 // Wallets implements accounts.Backend, returning all the currently tracked USB
-// devices that appear to be Ledger hardware wallets.
-func (hub *LedgerHub) Wallets() []accounts.Wallet {
+// devices that appear to be hardware wallets.
+func (hub *Hub) Wallets() []accounts.Wallet {
 	// Make sure the list of wallets is up to date
 	hub.refreshWallets()
 
@@ -92,17 +106,17 @@ func (hub *LedgerHub) Wallets() []accounts.Wallet {
 
 // refreshWallets scans the USB devices attached to the machine and updates the
 // list of wallets based on the found devices.
-func (hub *LedgerHub) refreshWallets() {
+func (hub *Hub) refreshWallets() {
 	// Don't scan the USB like crazy it the user fetches wallets in a loop
 	hub.stateLock.RLock()
 	elapsed := time.Since(hub.refreshed)
 	hub.stateLock.RUnlock()
 
-	if elapsed < ledgerRefreshThrottling {
+	if elapsed < refreshThrottling {
 		return
 	}
-	// Retrieve the current list of Ledger devices
-	var ledgers []hid.DeviceInfo
+	// Retrieve the current list of USB wallet devices
+	var devices []hid.DeviceInfo
 
 	if runtime.GOOS == "linux" {
 		// hidapi on Linux opens the device during enumeration to retrieve some infos,
@@ -117,10 +131,10 @@ func (hub *LedgerHub) refreshWallets() {
 			return
 		}
 	}
-	for _, info := range hid.Enumerate(0, 0) { // Can't enumerate directly, one valid ID is the 0 wildcard
-		for _, id := range ledgerDeviceIDs {
-			if info.VendorID == id.Vendor && info.ProductID == id.Product {
-				ledgers = append(ledgers, info)
+	for _, info := range hid.Enumerate(hub.vendorID, 0) {
+		for _, id := range hub.productIDs {
+			if info.ProductID == id && info.Interface == 0 {
+				devices = append(devices, info)
 				break
 			}
 		}
@@ -132,22 +146,29 @@ func (hub *LedgerHub) refreshWallets() {
 	// Transform the current list of wallets into the new one
 	hub.stateLock.Lock()
 
-	wallets := make([]accounts.Wallet, 0, len(ledgers))
+	wallets := make([]accounts.Wallet, 0, len(devices))
 	events := []accounts.WalletEvent{}
 
-	for _, ledger := range ledgers {
-		url := accounts.URL{Scheme: LedgerScheme, Path: ledger.Path}
+	for _, device := range devices {
+		url := accounts.URL{Scheme: hub.scheme, Path: device.Path}
 
 		// Drop wallets in front of the next device or those that failed for some reason
-		for len(hub.wallets) > 0 && (hub.wallets[0].URL().Cmp(url) < 0 || hub.wallets[0].(*ledgerWallet).failed()) {
-			events = append(events, accounts.WalletEvent{Wallet: hub.wallets[0], Arrive: false})
+		for len(hub.wallets) > 0 {
+			// Abort if we're past the current device and found an operational one
+			_, failure := hub.wallets[0].Status()
+			if hub.wallets[0].URL().Cmp(url) >= 0 || failure == nil {
+				break
+			}
+			// Drop the stale and failed devices
+			events = append(events, accounts.WalletEvent{Wallet: hub.wallets[0], Kind: accounts.WalletDropped})
 			hub.wallets = hub.wallets[1:]
 		}
 		// If there are no more wallets or the device is before the next, wrap new wallet
 		if len(hub.wallets) == 0 || hub.wallets[0].URL().Cmp(url) > 0 {
-			wallet := &ledgerWallet{hub: hub, url: &url, info: ledger, log: log.New("url", url)}
+			logger := log.New("url", url)
+			wallet := &wallet{hub: hub, driver: hub.makeDriver(logger), url: &url, info: device, log: logger}
 
-			events = append(events, accounts.WalletEvent{Wallet: wallet, Arrive: true})
+			events = append(events, accounts.WalletEvent{Wallet: wallet, Kind: accounts.WalletArrived})
 			wallets = append(wallets, wallet)
 			continue
 		}
@@ -160,7 +181,7 @@ func (hub *LedgerHub) refreshWallets() {
 	}
 	// Drop any leftover wallets and set the new batch
 	for _, wallet := range hub.wallets {
-		events = append(events, accounts.WalletEvent{Wallet: wallet, Arrive: false})
+		events = append(events, accounts.WalletEvent{Wallet: wallet, Kind: accounts.WalletDropped})
 	}
 	hub.refreshed = time.Now()
 	hub.wallets = wallets
@@ -173,8 +194,8 @@ func (hub *LedgerHub) refreshWallets() {
 }
 
 // Subscribe implements accounts.Backend, creating an async subscription to
-// receive notifications on the addition or removal of Ledger wallets.
-func (hub *LedgerHub) Subscribe(sink chan<- accounts.WalletEvent) event.Subscription {
+// receive notifications on the addition or removal of USB wallets.
+func (hub *Hub) Subscribe(sink chan<- accounts.WalletEvent) event.Subscription {
 	// We need the mutex to reliably start/stop the update loop
 	hub.stateLock.Lock()
 	defer hub.stateLock.Unlock()
@@ -190,16 +211,13 @@ func (hub *LedgerHub) Subscribe(sink chan<- accounts.WalletEvent) event.Subscrip
 	return sub
 }
 
-// updater is responsible for maintaining an up-to-date list of wallets stored in
-// the keystore, and for firing wallet addition/removal events. It listens for
-// account change events from the underlying account cache, and also periodically
-// forces a manual refresh (only triggers for systems where the filesystem notifier
-// is not running).
-func (hub *LedgerHub) updater() {
+// updater is responsible for maintaining an up-to-date list of wallets managed
+// by the USB hub, and for firing wallet addition/removal events.
+func (hub *Hub) updater() {
 	for {
 		// TODO: Wait for a USB hotplug event (not supported yet) or a refresh timeout
 		// <-hub.changes
-		time.Sleep(ledgerRefreshCycle)
+		time.Sleep(refreshCycle)
 
 		// Run the wallet refresher
 		hub.refreshWallets()
diff --git a/accounts/usbwallet/internal/trezor/messages.pb.go b/accounts/usbwallet/internal/trezor/messages.pb.go
new file mode 100644
index 000000000..15bb6fb73
--- /dev/null
+++ b/accounts/usbwallet/internal/trezor/messages.pb.go
@@ -0,0 +1,3081 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: messages.proto
+
+package trezor
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// *
+// Mapping between Trezor wire identifier (uint) and a protobuf message
+type MessageType int32
+
+const (
+	MessageType_MessageType_Initialize               MessageType = 0
+	MessageType_MessageType_Ping                     MessageType = 1
+	MessageType_MessageType_Success                  MessageType = 2
+	MessageType_MessageType_Failure                  MessageType = 3
+	MessageType_MessageType_ChangePin                MessageType = 4
+	MessageType_MessageType_WipeDevice               MessageType = 5
+	MessageType_MessageType_FirmwareErase            MessageType = 6
+	MessageType_MessageType_FirmwareUpload           MessageType = 7
+	MessageType_MessageType_FirmwareRequest          MessageType = 8
+	MessageType_MessageType_GetEntropy               MessageType = 9
+	MessageType_MessageType_Entropy                  MessageType = 10
+	MessageType_MessageType_GetPublicKey             MessageType = 11
+	MessageType_MessageType_PublicKey                MessageType = 12
+	MessageType_MessageType_LoadDevice               MessageType = 13
+	MessageType_MessageType_ResetDevice              MessageType = 14
+	MessageType_MessageType_SignTx                   MessageType = 15
+	MessageType_MessageType_SimpleSignTx             MessageType = 16
+	MessageType_MessageType_Features                 MessageType = 17
+	MessageType_MessageType_PinMatrixRequest         MessageType = 18
+	MessageType_MessageType_PinMatrixAck             MessageType = 19
+	MessageType_MessageType_Cancel                   MessageType = 20
+	MessageType_MessageType_TxRequest                MessageType = 21
+	MessageType_MessageType_TxAck                    MessageType = 22
+	MessageType_MessageType_CipherKeyValue           MessageType = 23
+	MessageType_MessageType_ClearSession             MessageType = 24
+	MessageType_MessageType_ApplySettings            MessageType = 25
+	MessageType_MessageType_ButtonRequest            MessageType = 26
+	MessageType_MessageType_ButtonAck                MessageType = 27
+	MessageType_MessageType_ApplyFlags               MessageType = 28
+	MessageType_MessageType_GetAddress               MessageType = 29
+	MessageType_MessageType_Address                  MessageType = 30
+	MessageType_MessageType_SelfTest                 MessageType = 32
+	MessageType_MessageType_BackupDevice             MessageType = 34
+	MessageType_MessageType_EntropyRequest           MessageType = 35
+	MessageType_MessageType_EntropyAck               MessageType = 36
+	MessageType_MessageType_SignMessage              MessageType = 38
+	MessageType_MessageType_VerifyMessage            MessageType = 39
+	MessageType_MessageType_MessageSignature         MessageType = 40
+	MessageType_MessageType_PassphraseRequest        MessageType = 41
+	MessageType_MessageType_PassphraseAck            MessageType = 42
+	MessageType_MessageType_EstimateTxSize           MessageType = 43
+	MessageType_MessageType_TxSize                   MessageType = 44
+	MessageType_MessageType_RecoveryDevice           MessageType = 45
+	MessageType_MessageType_WordRequest              MessageType = 46
+	MessageType_MessageType_WordAck                  MessageType = 47
+	MessageType_MessageType_CipheredKeyValue         MessageType = 48
+	MessageType_MessageType_EncryptMessage           MessageType = 49
+	MessageType_MessageType_EncryptedMessage         MessageType = 50
+	MessageType_MessageType_DecryptMessage           MessageType = 51
+	MessageType_MessageType_DecryptedMessage         MessageType = 52
+	MessageType_MessageType_SignIdentity             MessageType = 53
+	MessageType_MessageType_SignedIdentity           MessageType = 54
+	MessageType_MessageType_GetFeatures              MessageType = 55
+	MessageType_MessageType_EthereumGetAddress       MessageType = 56
+	MessageType_MessageType_EthereumAddress          MessageType = 57
+	MessageType_MessageType_EthereumSignTx           MessageType = 58
+	MessageType_MessageType_EthereumTxRequest        MessageType = 59
+	MessageType_MessageType_EthereumTxAck            MessageType = 60
+	MessageType_MessageType_GetECDHSessionKey        MessageType = 61
+	MessageType_MessageType_ECDHSessionKey           MessageType = 62
+	MessageType_MessageType_SetU2FCounter            MessageType = 63
+	MessageType_MessageType_EthereumSignMessage      MessageType = 64
+	MessageType_MessageType_EthereumVerifyMessage    MessageType = 65
+	MessageType_MessageType_EthereumMessageSignature MessageType = 66
+	MessageType_MessageType_DebugLinkDecision        MessageType = 100
+	MessageType_MessageType_DebugLinkGetState        MessageType = 101
+	MessageType_MessageType_DebugLinkState           MessageType = 102
+	MessageType_MessageType_DebugLinkStop            MessageType = 103
+	MessageType_MessageType_DebugLinkLog             MessageType = 104
+	MessageType_MessageType_DebugLinkMemoryRead      MessageType = 110
+	MessageType_MessageType_DebugLinkMemory          MessageType = 111
+	MessageType_MessageType_DebugLinkMemoryWrite     MessageType = 112
+	MessageType_MessageType_DebugLinkFlashErase      MessageType = 113
+)
+
+var MessageType_name = map[int32]string{
+	0:   "MessageType_Initialize",
+	1:   "MessageType_Ping",
+	2:   "MessageType_Success",
+	3:   "MessageType_Failure",
+	4:   "MessageType_ChangePin",
+	5:   "MessageType_WipeDevice",
+	6:   "MessageType_FirmwareErase",
+	7:   "MessageType_FirmwareUpload",
+	8:   "MessageType_FirmwareRequest",
+	9:   "MessageType_GetEntropy",
+	10:  "MessageType_Entropy",
+	11:  "MessageType_GetPublicKey",
+	12:  "MessageType_PublicKey",
+	13:  "MessageType_LoadDevice",
+	14:  "MessageType_ResetDevice",
+	15:  "MessageType_SignTx",
+	16:  "MessageType_SimpleSignTx",
+	17:  "MessageType_Features",
+	18:  "MessageType_PinMatrixRequest",
+	19:  "MessageType_PinMatrixAck",
+	20:  "MessageType_Cancel",
+	21:  "MessageType_TxRequest",
+	22:  "MessageType_TxAck",
+	23:  "MessageType_CipherKeyValue",
+	24:  "MessageType_ClearSession",
+	25:  "MessageType_ApplySettings",
+	26:  "MessageType_ButtonRequest",
+	27:  "MessageType_ButtonAck",
+	28:  "MessageType_ApplyFlags",
+	29:  "MessageType_GetAddress",
+	30:  "MessageType_Address",
+	32:  "MessageType_SelfTest",
+	34:  "MessageType_BackupDevice",
+	35:  "MessageType_EntropyRequest",
+	36:  "MessageType_EntropyAck",
+	38:  "MessageType_SignMessage",
+	39:  "MessageType_VerifyMessage",
+	40:  "MessageType_MessageSignature",
+	41:  "MessageType_PassphraseRequest",
+	42:  "MessageType_PassphraseAck",
+	43:  "MessageType_EstimateTxSize",
+	44:  "MessageType_TxSize",
+	45:  "MessageType_RecoveryDevice",
+	46:  "MessageType_WordRequest",
+	47:  "MessageType_WordAck",
+	48:  "MessageType_CipheredKeyValue",
+	49:  "MessageType_EncryptMessage",
+	50:  "MessageType_EncryptedMessage",
+	51:  "MessageType_DecryptMessage",
+	52:  "MessageType_DecryptedMessage",
+	53:  "MessageType_SignIdentity",
+	54:  "MessageType_SignedIdentity",
+	55:  "MessageType_GetFeatures",
+	56:  "MessageType_EthereumGetAddress",
+	57:  "MessageType_EthereumAddress",
+	58:  "MessageType_EthereumSignTx",
+	59:  "MessageType_EthereumTxRequest",
+	60:  "MessageType_EthereumTxAck",
+	61:  "MessageType_GetECDHSessionKey",
+	62:  "MessageType_ECDHSessionKey",
+	63:  "MessageType_SetU2FCounter",
+	64:  "MessageType_EthereumSignMessage",
+	65:  "MessageType_EthereumVerifyMessage",
+	66:  "MessageType_EthereumMessageSignature",
+	100: "MessageType_DebugLinkDecision",
+	101: "MessageType_DebugLinkGetState",
+	102: "MessageType_DebugLinkState",
+	103: "MessageType_DebugLinkStop",
+	104: "MessageType_DebugLinkLog",
+	110: "MessageType_DebugLinkMemoryRead",
+	111: "MessageType_DebugLinkMemory",
+	112: "MessageType_DebugLinkMemoryWrite",
+	113: "MessageType_DebugLinkFlashErase",
+}
+var MessageType_value = map[string]int32{
+	"MessageType_Initialize":               0,
+	"MessageType_Ping":                     1,
+	"MessageType_Success":                  2,
+	"MessageType_Failure":                  3,
+	"MessageType_ChangePin":                4,
+	"MessageType_WipeDevice":               5,
+	"MessageType_FirmwareErase":            6,
+	"MessageType_FirmwareUpload":           7,
+	"MessageType_FirmwareRequest":          8,
+	"MessageType_GetEntropy":               9,
+	"MessageType_Entropy":                  10,
+	"MessageType_GetPublicKey":             11,
+	"MessageType_PublicKey":                12,
+	"MessageType_LoadDevice":               13,
+	"MessageType_ResetDevice":              14,
+	"MessageType_SignTx":                   15,
+	"MessageType_SimpleSignTx":             16,
+	"MessageType_Features":                 17,
+	"MessageType_PinMatrixRequest":         18,
+	"MessageType_PinMatrixAck":             19,
+	"MessageType_Cancel":                   20,
+	"MessageType_TxRequest":                21,
+	"MessageType_TxAck":                    22,
+	"MessageType_CipherKeyValue":           23,
+	"MessageType_ClearSession":             24,
+	"MessageType_ApplySettings":            25,
+	"MessageType_ButtonRequest":            26,
+	"MessageType_ButtonAck":                27,
+	"MessageType_ApplyFlags":               28,
+	"MessageType_GetAddress":               29,
+	"MessageType_Address":                  30,
+	"MessageType_SelfTest":                 32,
+	"MessageType_BackupDevice":             34,
+	"MessageType_EntropyRequest":           35,
+	"MessageType_EntropyAck":               36,
+	"MessageType_SignMessage":              38,
+	"MessageType_VerifyMessage":            39,
+	"MessageType_MessageSignature":         40,
+	"MessageType_PassphraseRequest":        41,
+	"MessageType_PassphraseAck":            42,
+	"MessageType_EstimateTxSize":           43,
+	"MessageType_TxSize":                   44,
+	"MessageType_RecoveryDevice":           45,
+	"MessageType_WordRequest":              46,
+	"MessageType_WordAck":                  47,
+	"MessageType_CipheredKeyValue":         48,
+	"MessageType_EncryptMessage":           49,
+	"MessageType_EncryptedMessage":         50,
+	"MessageType_DecryptMessage":           51,
+	"MessageType_DecryptedMessage":         52,
+	"MessageType_SignIdentity":             53,
+	"MessageType_SignedIdentity":           54,
+	"MessageType_GetFeatures":              55,
+	"MessageType_EthereumGetAddress":       56,
+	"MessageType_EthereumAddress":          57,
+	"MessageType_EthereumSignTx":           58,
+	"MessageType_EthereumTxRequest":        59,
+	"MessageType_EthereumTxAck":            60,
+	"MessageType_GetECDHSessionKey":        61,
+	"MessageType_ECDHSessionKey":           62,
+	"MessageType_SetU2FCounter":            63,
+	"MessageType_EthereumSignMessage":      64,
+	"MessageType_EthereumVerifyMessage":    65,
+	"MessageType_EthereumMessageSignature": 66,
+	"MessageType_DebugLinkDecision":        100,
+	"MessageType_DebugLinkGetState":        101,
+	"MessageType_DebugLinkState":           102,
+	"MessageType_DebugLinkStop":            103,
+	"MessageType_DebugLinkLog":             104,
+	"MessageType_DebugLinkMemoryRead":      110,
+	"MessageType_DebugLinkMemory":          111,
+	"MessageType_DebugLinkMemoryWrite":     112,
+	"MessageType_DebugLinkFlashErase":      113,
+}
+
+func (x MessageType) Enum() *MessageType {
+	p := new(MessageType)
+	*p = x
+	return p
+}
+func (x MessageType) String() string {
+	return proto.EnumName(MessageType_name, int32(x))
+}
+func (x *MessageType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(MessageType_value, data, "MessageType")
+	if err != nil {
+		return err
+	}
+	*x = MessageType(value)
+	return nil
+}
+func (MessageType) EnumDescriptor() ([]byte, []int) { return fileDescriptor1, []int{0} }
+
+// *
+// Request: Reset device to default state and ask for device details
+// @next Features
+type Initialize struct {
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *Initialize) Reset()                    { *m = Initialize{} }
+func (m *Initialize) String() string            { return proto.CompactTextString(m) }
+func (*Initialize) ProtoMessage()               {}
+func (*Initialize) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{0} }
+
+// *
+// Request: Ask for device details (no device reset)
+// @next Features
+type GetFeatures struct {
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *GetFeatures) Reset()                    { *m = GetFeatures{} }
+func (m *GetFeatures) String() string            { return proto.CompactTextString(m) }
+func (*GetFeatures) ProtoMessage()               {}
+func (*GetFeatures) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{1} }
+
+// *
+// Response: Reports various information about the device
+// @prev Initialize
+// @prev GetFeatures
+type Features struct {
+	Vendor               *string     `protobuf:"bytes,1,opt,name=vendor" json:"vendor,omitempty"`
+	MajorVersion         *uint32     `protobuf:"varint,2,opt,name=major_version,json=majorVersion" json:"major_version,omitempty"`
+	MinorVersion         *uint32     `protobuf:"varint,3,opt,name=minor_version,json=minorVersion" json:"minor_version,omitempty"`
+	PatchVersion         *uint32     `protobuf:"varint,4,opt,name=patch_version,json=patchVersion" json:"patch_version,omitempty"`
+	BootloaderMode       *bool       `protobuf:"varint,5,opt,name=bootloader_mode,json=bootloaderMode" json:"bootloader_mode,omitempty"`
+	DeviceId             *string     `protobuf:"bytes,6,opt,name=device_id,json=deviceId" json:"device_id,omitempty"`
+	PinProtection        *bool       `protobuf:"varint,7,opt,name=pin_protection,json=pinProtection" json:"pin_protection,omitempty"`
+	PassphraseProtection *bool       `protobuf:"varint,8,opt,name=passphrase_protection,json=passphraseProtection" json:"passphrase_protection,omitempty"`
+	Language             *string     `protobuf:"bytes,9,opt,name=language" json:"language,omitempty"`
+	Label                *string     `protobuf:"bytes,10,opt,name=label" json:"label,omitempty"`
+	Coins                []*CoinType `protobuf:"bytes,11,rep,name=coins" json:"coins,omitempty"`
+	Initialized          *bool       `protobuf:"varint,12,opt,name=initialized" json:"initialized,omitempty"`
+	Revision             []byte      `protobuf:"bytes,13,opt,name=revision" json:"revision,omitempty"`
+	BootloaderHash       []byte      `protobuf:"bytes,14,opt,name=bootloader_hash,json=bootloaderHash" json:"bootloader_hash,omitempty"`
+	Imported             *bool       `protobuf:"varint,15,opt,name=imported" json:"imported,omitempty"`
+	PinCached            *bool       `protobuf:"varint,16,opt,name=pin_cached,json=pinCached" json:"pin_cached,omitempty"`
+	PassphraseCached     *bool       `protobuf:"varint,17,opt,name=passphrase_cached,json=passphraseCached" json:"passphrase_cached,omitempty"`
+	FirmwarePresent      *bool       `protobuf:"varint,18,opt,name=firmware_present,json=firmwarePresent" json:"firmware_present,omitempty"`
+	NeedsBackup          *bool       `protobuf:"varint,19,opt,name=needs_backup,json=needsBackup" json:"needs_backup,omitempty"`
+	Flags                *uint32     `protobuf:"varint,20,opt,name=flags" json:"flags,omitempty"`
+	XXX_unrecognized     []byte      `json:"-"`
+}
+
+func (m *Features) Reset()                    { *m = Features{} }
+func (m *Features) String() string            { return proto.CompactTextString(m) }
+func (*Features) ProtoMessage()               {}
+func (*Features) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{2} }
+
+func (m *Features) GetVendor() string {
+	if m != nil && m.Vendor != nil {
+		return *m.Vendor
+	}
+	return ""
+}
+
+func (m *Features) GetMajorVersion() uint32 {
+	if m != nil && m.MajorVersion != nil {
+		return *m.MajorVersion
+	}
+	return 0
+}
+
+func (m *Features) GetMinorVersion() uint32 {
+	if m != nil && m.MinorVersion != nil {
+		return *m.MinorVersion
+	}
+	return 0
+}
+
+func (m *Features) GetPatchVersion() uint32 {
+	if m != nil && m.PatchVersion != nil {
+		return *m.PatchVersion
+	}
+	return 0
+}
+
+func (m *Features) GetBootloaderMode() bool {
+	if m != nil && m.BootloaderMode != nil {
+		return *m.BootloaderMode
+	}
+	return false
+}
+
+func (m *Features) GetDeviceId() string {
+	if m != nil && m.DeviceId != nil {
+		return *m.DeviceId
+	}
+	return ""
+}
+
+func (m *Features) GetPinProtection() bool {
+	if m != nil && m.PinProtection != nil {
+		return *m.PinProtection
+	}
+	return false
+}
+
+func (m *Features) GetPassphraseProtection() bool {
+	if m != nil && m.PassphraseProtection != nil {
+		return *m.PassphraseProtection
+	}
+	return false
+}
+
+func (m *Features) GetLanguage() string {
+	if m != nil && m.Language != nil {
+		return *m.Language
+	}
+	return ""
+}
+
+func (m *Features) GetLabel() string {
+	if m != nil && m.Label != nil {
+		return *m.Label
+	}
+	return ""
+}
+
+func (m *Features) GetCoins() []*CoinType {
+	if m != nil {
+		return m.Coins
+	}
+	return nil
+}
+
+func (m *Features) GetInitialized() bool {
+	if m != nil && m.Initialized != nil {
+		return *m.Initialized
+	}
+	return false
+}
+
+func (m *Features) GetRevision() []byte {
+	if m != nil {
+		return m.Revision
+	}
+	return nil
+}
+
+func (m *Features) GetBootloaderHash() []byte {
+	if m != nil {
+		return m.BootloaderHash
+	}
+	return nil
+}
+
+func (m *Features) GetImported() bool {
+	if m != nil && m.Imported != nil {
+		return *m.Imported
+	}
+	return false
+}
+
+func (m *Features) GetPinCached() bool {
+	if m != nil && m.PinCached != nil {
+		return *m.PinCached
+	}
+	return false
+}
+
+func (m *Features) GetPassphraseCached() bool {
+	if m != nil && m.PassphraseCached != nil {
+		return *m.PassphraseCached
+	}
+	return false
+}
+
+func (m *Features) GetFirmwarePresent() bool {
+	if m != nil && m.FirmwarePresent != nil {
+		return *m.FirmwarePresent
+	}
+	return false
+}
+
+func (m *Features) GetNeedsBackup() bool {
+	if m != nil && m.NeedsBackup != nil {
+		return *m.NeedsBackup
+	}
+	return false
+}
+
+func (m *Features) GetFlags() uint32 {
+	if m != nil && m.Flags != nil {
+		return *m.Flags
+	}
+	return 0
+}
+
+// *
+// Request: clear session (removes cached PIN, passphrase, etc).
+// @next Success
+type ClearSession struct {
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *ClearSession) Reset()                    { *m = ClearSession{} }
+func (m *ClearSession) String() string            { return proto.CompactTextString(m) }
+func (*ClearSession) ProtoMessage()               {}
+func (*ClearSession) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{3} }
+
+// *
+// Request: change language and/or label of the device
+// @next Success
+// @next Failure
+// @next ButtonRequest
+// @next PinMatrixRequest
+type ApplySettings struct {
+	Language         *string `protobuf:"bytes,1,opt,name=language" json:"language,omitempty"`
+	Label            *string `protobuf:"bytes,2,opt,name=label" json:"label,omitempty"`
+	UsePassphrase    *bool   `protobuf:"varint,3,opt,name=use_passphrase,json=usePassphrase" json:"use_passphrase,omitempty"`
+	Homescreen       []byte  `protobuf:"bytes,4,opt,name=homescreen" json:"homescreen,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *ApplySettings) Reset()                    { *m = ApplySettings{} }
+func (m *ApplySettings) String() string            { return proto.CompactTextString(m) }
+func (*ApplySettings) ProtoMessage()               {}
+func (*ApplySettings) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{4} }
+
+func (m *ApplySettings) GetLanguage() string {
+	if m != nil && m.Language != nil {
+		return *m.Language
+	}
+	return ""
+}
+
+func (m *ApplySettings) GetLabel() string {
+	if m != nil && m.Label != nil {
+		return *m.Label
+	}
+	return ""
+}
+
+func (m *ApplySettings) GetUsePassphrase() bool {
+	if m != nil && m.UsePassphrase != nil {
+		return *m.UsePassphrase
+	}
+	return false
+}
+
+func (m *ApplySettings) GetHomescreen() []byte {
+	if m != nil {
+		return m.Homescreen
+	}
+	return nil
+}
+
+// *
+// Request: set flags of the device
+// @next Success
+// @next Failure
+type ApplyFlags struct {
+	Flags            *uint32 `protobuf:"varint,1,opt,name=flags" json:"flags,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *ApplyFlags) Reset()                    { *m = ApplyFlags{} }
+func (m *ApplyFlags) String() string            { return proto.CompactTextString(m) }
+func (*ApplyFlags) ProtoMessage()               {}
+func (*ApplyFlags) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{5} }
+
+func (m *ApplyFlags) GetFlags() uint32 {
+	if m != nil && m.Flags != nil {
+		return *m.Flags
+	}
+	return 0
+}
+
+// *
+// Request: Starts workflow for setting/changing/removing the PIN
+// @next ButtonRequest
+// @next PinMatrixRequest
+type ChangePin struct {
+	Remove           *bool  `protobuf:"varint,1,opt,name=remove" json:"remove,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *ChangePin) Reset()                    { *m = ChangePin{} }
+func (m *ChangePin) String() string            { return proto.CompactTextString(m) }
+func (*ChangePin) ProtoMessage()               {}
+func (*ChangePin) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{6} }
+
+func (m *ChangePin) GetRemove() bool {
+	if m != nil && m.Remove != nil {
+		return *m.Remove
+	}
+	return false
+}
+
+// *
+// Request: Test if the device is alive, device sends back the message in Success response
+// @next Success
+type Ping struct {
+	Message              *string `protobuf:"bytes,1,opt,name=message" json:"message,omitempty"`
+	ButtonProtection     *bool   `protobuf:"varint,2,opt,name=button_protection,json=buttonProtection" json:"button_protection,omitempty"`
+	PinProtection        *bool   `protobuf:"varint,3,opt,name=pin_protection,json=pinProtection" json:"pin_protection,omitempty"`
+	PassphraseProtection *bool   `protobuf:"varint,4,opt,name=passphrase_protection,json=passphraseProtection" json:"passphrase_protection,omitempty"`
+	XXX_unrecognized     []byte  `json:"-"`
+}
+
+func (m *Ping) Reset()                    { *m = Ping{} }
+func (m *Ping) String() string            { return proto.CompactTextString(m) }
+func (*Ping) ProtoMessage()               {}
+func (*Ping) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{7} }
+
+func (m *Ping) GetMessage() string {
+	if m != nil && m.Message != nil {
+		return *m.Message
+	}
+	return ""
+}
+
+func (m *Ping) GetButtonProtection() bool {
+	if m != nil && m.ButtonProtection != nil {
+		return *m.ButtonProtection
+	}
+	return false
+}
+
+func (m *Ping) GetPinProtection() bool {
+	if m != nil && m.PinProtection != nil {
+		return *m.PinProtection
+	}
+	return false
+}
+
+func (m *Ping) GetPassphraseProtection() bool {
+	if m != nil && m.PassphraseProtection != nil {
+		return *m.PassphraseProtection
+	}
+	return false
+}
+
+// *
+// Response: Success of the previous request
+type Success struct {
+	Message          *string `protobuf:"bytes,1,opt,name=message" json:"message,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *Success) Reset()                    { *m = Success{} }
+func (m *Success) String() string            { return proto.CompactTextString(m) }
+func (*Success) ProtoMessage()               {}
+func (*Success) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{8} }
+
+func (m *Success) GetMessage() string {
+	if m != nil && m.Message != nil {
+		return *m.Message
+	}
+	return ""
+}
+
+// *
+// Response: Failure of the previous request
+type Failure struct {
+	Code             *FailureType `protobuf:"varint,1,opt,name=code,enum=FailureType" json:"code,omitempty"`
+	Message          *string      `protobuf:"bytes,2,opt,name=message" json:"message,omitempty"`
+	XXX_unrecognized []byte       `json:"-"`
+}
+
+func (m *Failure) Reset()                    { *m = Failure{} }
+func (m *Failure) String() string            { return proto.CompactTextString(m) }
+func (*Failure) ProtoMessage()               {}
+func (*Failure) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{9} }
+
+func (m *Failure) GetCode() FailureType {
+	if m != nil && m.Code != nil {
+		return *m.Code
+	}
+	return FailureType_Failure_UnexpectedMessage
+}
+
+func (m *Failure) GetMessage() string {
+	if m != nil && m.Message != nil {
+		return *m.Message
+	}
+	return ""
+}
+
+// *
+// Response: Device is waiting for HW button press.
+// @next ButtonAck
+// @next Cancel
+type ButtonRequest struct {
+	Code             *ButtonRequestType `protobuf:"varint,1,opt,name=code,enum=ButtonRequestType" json:"code,omitempty"`
+	Data             *string            `protobuf:"bytes,2,opt,name=data" json:"data,omitempty"`
+	XXX_unrecognized []byte             `json:"-"`
+}
+
+func (m *ButtonRequest) Reset()                    { *m = ButtonRequest{} }
+func (m *ButtonRequest) String() string            { return proto.CompactTextString(m) }
+func (*ButtonRequest) ProtoMessage()               {}
+func (*ButtonRequest) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{10} }
+
+func (m *ButtonRequest) GetCode() ButtonRequestType {
+	if m != nil && m.Code != nil {
+		return *m.Code
+	}
+	return ButtonRequestType_ButtonRequest_Other
+}
+
+func (m *ButtonRequest) GetData() string {
+	if m != nil && m.Data != nil {
+		return *m.Data
+	}
+	return ""
+}
+
+// *
+// Request: Computer agrees to wait for HW button press
+// @prev ButtonRequest
+type ButtonAck struct {
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *ButtonAck) Reset()                    { *m = ButtonAck{} }
+func (m *ButtonAck) String() string            { return proto.CompactTextString(m) }
+func (*ButtonAck) ProtoMessage()               {}
+func (*ButtonAck) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{11} }
+
+// *
+// Response: Device is asking computer to show PIN matrix and awaits PIN encoded using this matrix scheme
+// @next PinMatrixAck
+// @next Cancel
+type PinMatrixRequest struct {
+	Type             *PinMatrixRequestType `protobuf:"varint,1,opt,name=type,enum=PinMatrixRequestType" json:"type,omitempty"`
+	XXX_unrecognized []byte                `json:"-"`
+}
+
+func (m *PinMatrixRequest) Reset()                    { *m = PinMatrixRequest{} }
+func (m *PinMatrixRequest) String() string            { return proto.CompactTextString(m) }
+func (*PinMatrixRequest) ProtoMessage()               {}
+func (*PinMatrixRequest) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{12} }
+
+func (m *PinMatrixRequest) GetType() PinMatrixRequestType {
+	if m != nil && m.Type != nil {
+		return *m.Type
+	}
+	return PinMatrixRequestType_PinMatrixRequestType_Current
+}
+
+// *
+// Request: Computer responds with encoded PIN
+// @prev PinMatrixRequest
+type PinMatrixAck struct {
+	Pin              *string `protobuf:"bytes,1,req,name=pin" json:"pin,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *PinMatrixAck) Reset()                    { *m = PinMatrixAck{} }
+func (m *PinMatrixAck) String() string            { return proto.CompactTextString(m) }
+func (*PinMatrixAck) ProtoMessage()               {}
+func (*PinMatrixAck) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{13} }
+
+func (m *PinMatrixAck) GetPin() string {
+	if m != nil && m.Pin != nil {
+		return *m.Pin
+	}
+	return ""
+}
+
+// *
+// Request: Abort last operation that required user interaction
+// @prev ButtonRequest
+// @prev PinMatrixRequest
+// @prev PassphraseRequest
+type Cancel struct {
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *Cancel) Reset()                    { *m = Cancel{} }
+func (m *Cancel) String() string            { return proto.CompactTextString(m) }
+func (*Cancel) ProtoMessage()               {}
+func (*Cancel) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{14} }
+
+// *
+// Response: Device awaits encryption passphrase
+// @next PassphraseAck
+// @next Cancel
+type PassphraseRequest struct {
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *PassphraseRequest) Reset()                    { *m = PassphraseRequest{} }
+func (m *PassphraseRequest) String() string            { return proto.CompactTextString(m) }
+func (*PassphraseRequest) ProtoMessage()               {}
+func (*PassphraseRequest) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{15} }
+
+// *
+// Request: Send passphrase back
+// @prev PassphraseRequest
+type PassphraseAck struct {
+	Passphrase       *string `protobuf:"bytes,1,req,name=passphrase" json:"passphrase,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *PassphraseAck) Reset()                    { *m = PassphraseAck{} }
+func (m *PassphraseAck) String() string            { return proto.CompactTextString(m) }
+func (*PassphraseAck) ProtoMessage()               {}
+func (*PassphraseAck) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{16} }
+
+func (m *PassphraseAck) GetPassphrase() string {
+	if m != nil && m.Passphrase != nil {
+		return *m.Passphrase
+	}
+	return ""
+}
+
+// *
+// Request: Request a sample of random data generated by hardware RNG. May be used for testing.
+// @next ButtonRequest
+// @next Entropy
+// @next Failure
+type GetEntropy struct {
+	Size             *uint32 `protobuf:"varint,1,req,name=size" json:"size,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *GetEntropy) Reset()                    { *m = GetEntropy{} }
+func (m *GetEntropy) String() string            { return proto.CompactTextString(m) }
+func (*GetEntropy) ProtoMessage()               {}
+func (*GetEntropy) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{17} }
+
+func (m *GetEntropy) GetSize() uint32 {
+	if m != nil && m.Size != nil {
+		return *m.Size
+	}
+	return 0
+}
+
+// *
+// Response: Reply with random data generated by internal RNG
+// @prev GetEntropy
+type Entropy struct {
+	Entropy          []byte `protobuf:"bytes,1,req,name=entropy" json:"entropy,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *Entropy) Reset()                    { *m = Entropy{} }
+func (m *Entropy) String() string            { return proto.CompactTextString(m) }
+func (*Entropy) ProtoMessage()               {}
+func (*Entropy) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{18} }
+
+func (m *Entropy) GetEntropy() []byte {
+	if m != nil {
+		return m.Entropy
+	}
+	return nil
+}
+
+// *
+// Request: Ask device for public key corresponding to address_n path
+// @next PassphraseRequest
+// @next PublicKey
+// @next Failure
+type GetPublicKey struct {
+	AddressN         []uint32 `protobuf:"varint,1,rep,name=address_n,json=addressN" json:"address_n,omitempty"`
+	EcdsaCurveName   *string  `protobuf:"bytes,2,opt,name=ecdsa_curve_name,json=ecdsaCurveName" json:"ecdsa_curve_name,omitempty"`
+	ShowDisplay      *bool    `protobuf:"varint,3,opt,name=show_display,json=showDisplay" json:"show_display,omitempty"`
+	CoinName         *string  `protobuf:"bytes,4,opt,name=coin_name,json=coinName,def=Bitcoin" json:"coin_name,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *GetPublicKey) Reset()                    { *m = GetPublicKey{} }
+func (m *GetPublicKey) String() string            { return proto.CompactTextString(m) }
+func (*GetPublicKey) ProtoMessage()               {}
+func (*GetPublicKey) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{19} }
+
+const Default_GetPublicKey_CoinName string = "Bitcoin"
+
+func (m *GetPublicKey) GetAddressN() []uint32 {
+	if m != nil {
+		return m.AddressN
+	}
+	return nil
+}
+
+func (m *GetPublicKey) GetEcdsaCurveName() string {
+	if m != nil && m.EcdsaCurveName != nil {
+		return *m.EcdsaCurveName
+	}
+	return ""
+}
+
+func (m *GetPublicKey) GetShowDisplay() bool {
+	if m != nil && m.ShowDisplay != nil {
+		return *m.ShowDisplay
+	}
+	return false
+}
+
+func (m *GetPublicKey) GetCoinName() string {
+	if m != nil && m.CoinName != nil {
+		return *m.CoinName
+	}
+	return Default_GetPublicKey_CoinName
+}
+
+// *
+// Response: Contains public key derived from device private seed
+// @prev GetPublicKey
+type PublicKey struct {
+	Node             *HDNodeType `protobuf:"bytes,1,req,name=node" json:"node,omitempty"`
+	Xpub             *string     `protobuf:"bytes,2,opt,name=xpub" json:"xpub,omitempty"`
+	XXX_unrecognized []byte      `json:"-"`
+}
+
+func (m *PublicKey) Reset()                    { *m = PublicKey{} }
+func (m *PublicKey) String() string            { return proto.CompactTextString(m) }
+func (*PublicKey) ProtoMessage()               {}
+func (*PublicKey) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{20} }
+
+func (m *PublicKey) GetNode() *HDNodeType {
+	if m != nil {
+		return m.Node
+	}
+	return nil
+}
+
+func (m *PublicKey) GetXpub() string {
+	if m != nil && m.Xpub != nil {
+		return *m.Xpub
+	}
+	return ""
+}
+
+// *
+// Request: Ask device for address corresponding to address_n path
+// @next PassphraseRequest
+// @next Address
+// @next Failure
+type GetAddress struct {
+	AddressN         []uint32                  `protobuf:"varint,1,rep,name=address_n,json=addressN" json:"address_n,omitempty"`
+	CoinName         *string                   `protobuf:"bytes,2,opt,name=coin_name,json=coinName,def=Bitcoin" json:"coin_name,omitempty"`
+	ShowDisplay      *bool                     `protobuf:"varint,3,opt,name=show_display,json=showDisplay" json:"show_display,omitempty"`
+	Multisig         *MultisigRedeemScriptType `protobuf:"bytes,4,opt,name=multisig" json:"multisig,omitempty"`
+	ScriptType       *InputScriptType          `protobuf:"varint,5,opt,name=script_type,json=scriptType,enum=InputScriptType,def=0" json:"script_type,omitempty"`
+	XXX_unrecognized []byte                    `json:"-"`
+}
+
+func (m *GetAddress) Reset()                    { *m = GetAddress{} }
+func (m *GetAddress) String() string            { return proto.CompactTextString(m) }
+func (*GetAddress) ProtoMessage()               {}
+func (*GetAddress) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{21} }
+
+const Default_GetAddress_CoinName string = "Bitcoin"
+const Default_GetAddress_ScriptType InputScriptType = InputScriptType_SPENDADDRESS
+
+func (m *GetAddress) GetAddressN() []uint32 {
+	if m != nil {
+		return m.AddressN
+	}
+	return nil
+}
+
+func (m *GetAddress) GetCoinName() string {
+	if m != nil && m.CoinName != nil {
+		return *m.CoinName
+	}
+	return Default_GetAddress_CoinName
+}
+
+func (m *GetAddress) GetShowDisplay() bool {
+	if m != nil && m.ShowDisplay != nil {
+		return *m.ShowDisplay
+	}
+	return false
+}
+
+func (m *GetAddress) GetMultisig() *MultisigRedeemScriptType {
+	if m != nil {
+		return m.Multisig
+	}
+	return nil
+}
+
+func (m *GetAddress) GetScriptType() InputScriptType {
+	if m != nil && m.ScriptType != nil {
+		return *m.ScriptType
+	}
+	return Default_GetAddress_ScriptType
+}
+
+// *
+// Request: Ask device for Ethereum address corresponding to address_n path
+// @next PassphraseRequest
+// @next EthereumAddress
+// @next Failure
+type EthereumGetAddress struct {
+	AddressN         []uint32 `protobuf:"varint,1,rep,name=address_n,json=addressN" json:"address_n,omitempty"`
+	ShowDisplay      *bool    `protobuf:"varint,2,opt,name=show_display,json=showDisplay" json:"show_display,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *EthereumGetAddress) Reset()                    { *m = EthereumGetAddress{} }
+func (m *EthereumGetAddress) String() string            { return proto.CompactTextString(m) }
+func (*EthereumGetAddress) ProtoMessage()               {}
+func (*EthereumGetAddress) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{22} }
+
+func (m *EthereumGetAddress) GetAddressN() []uint32 {
+	if m != nil {
+		return m.AddressN
+	}
+	return nil
+}
+
+func (m *EthereumGetAddress) GetShowDisplay() bool {
+	if m != nil && m.ShowDisplay != nil {
+		return *m.ShowDisplay
+	}
+	return false
+}
+
+// *
+// Response: Contains address derived from device private seed
+// @prev GetAddress
+type Address struct {
+	Address          *string `protobuf:"bytes,1,req,name=address" json:"address,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *Address) Reset()                    { *m = Address{} }
+func (m *Address) String() string            { return proto.CompactTextString(m) }
+func (*Address) ProtoMessage()               {}
+func (*Address) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{23} }
+
+func (m *Address) GetAddress() string {
+	if m != nil && m.Address != nil {
+		return *m.Address
+	}
+	return ""
+}
+
+// *
+// Response: Contains an Ethereum address derived from device private seed
+// @prev EthereumGetAddress
+type EthereumAddress struct {
+	Address          []byte `protobuf:"bytes,1,req,name=address" json:"address,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *EthereumAddress) Reset()                    { *m = EthereumAddress{} }
+func (m *EthereumAddress) String() string            { return proto.CompactTextString(m) }
+func (*EthereumAddress) ProtoMessage()               {}
+func (*EthereumAddress) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{24} }
+
+func (m *EthereumAddress) GetAddress() []byte {
+	if m != nil {
+		return m.Address
+	}
+	return nil
+}
+
+// *
+// Request: Request device to wipe all sensitive data and settings
+// @next ButtonRequest
+type WipeDevice struct {
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *WipeDevice) Reset()                    { *m = WipeDevice{} }
+func (m *WipeDevice) String() string            { return proto.CompactTextString(m) }
+func (*WipeDevice) ProtoMessage()               {}
+func (*WipeDevice) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{25} }
+
+// *
+// Request: Load seed and related internal settings from the computer
+// @next ButtonRequest
+// @next Success
+// @next Failure
+type LoadDevice struct {
+	Mnemonic             *string     `protobuf:"bytes,1,opt,name=mnemonic" json:"mnemonic,omitempty"`
+	Node                 *HDNodeType `protobuf:"bytes,2,opt,name=node" json:"node,omitempty"`
+	Pin                  *string     `protobuf:"bytes,3,opt,name=pin" json:"pin,omitempty"`
+	PassphraseProtection *bool       `protobuf:"varint,4,opt,name=passphrase_protection,json=passphraseProtection" json:"passphrase_protection,omitempty"`
+	Language             *string     `protobuf:"bytes,5,opt,name=language,def=english" json:"language,omitempty"`
+	Label                *string     `protobuf:"bytes,6,opt,name=label" json:"label,omitempty"`
+	SkipChecksum         *bool       `protobuf:"varint,7,opt,name=skip_checksum,json=skipChecksum" json:"skip_checksum,omitempty"`
+	U2FCounter           *uint32     `protobuf:"varint,8,opt,name=u2f_counter,json=u2fCounter" json:"u2f_counter,omitempty"`
+	XXX_unrecognized     []byte      `json:"-"`
+}
+
+func (m *LoadDevice) Reset()                    { *m = LoadDevice{} }
+func (m *LoadDevice) String() string            { return proto.CompactTextString(m) }
+func (*LoadDevice) ProtoMessage()               {}
+func (*LoadDevice) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{26} }
+
+const Default_LoadDevice_Language string = "english"
+
+func (m *LoadDevice) GetMnemonic() string {
+	if m != nil && m.Mnemonic != nil {
+		return *m.Mnemonic
+	}
+	return ""
+}
+
+func (m *LoadDevice) GetNode() *HDNodeType {
+	if m != nil {
+		return m.Node
+	}
+	return nil
+}
+
+func (m *LoadDevice) GetPin() string {
+	if m != nil && m.Pin != nil {
+		return *m.Pin
+	}
+	return ""
+}
+
+func (m *LoadDevice) GetPassphraseProtection() bool {
+	if m != nil && m.PassphraseProtection != nil {
+		return *m.PassphraseProtection
+	}
+	return false
+}
+
+func (m *LoadDevice) GetLanguage() string {
+	if m != nil && m.Language != nil {
+		return *m.Language
+	}
+	return Default_LoadDevice_Language
+}
+
+func (m *LoadDevice) GetLabel() string {
+	if m != nil && m.Label != nil {
+		return *m.Label
+	}
+	return ""
+}
+
+func (m *LoadDevice) GetSkipChecksum() bool {
+	if m != nil && m.SkipChecksum != nil {
+		return *m.SkipChecksum
+	}
+	return false
+}
+
+func (m *LoadDevice) GetU2FCounter() uint32 {
+	if m != nil && m.U2FCounter != nil {
+		return *m.U2FCounter
+	}
+	return 0
+}
+
+// *
+// Request: Ask device to do initialization involving user interaction
+// @next EntropyRequest
+// @next Failure
+type ResetDevice struct {
+	DisplayRandom        *bool   `protobuf:"varint,1,opt,name=display_random,json=displayRandom" json:"display_random,omitempty"`
+	Strength             *uint32 `protobuf:"varint,2,opt,name=strength,def=256" json:"strength,omitempty"`
+	PassphraseProtection *bool   `protobuf:"varint,3,opt,name=passphrase_protection,json=passphraseProtection" json:"passphrase_protection,omitempty"`
+	PinProtection        *bool   `protobuf:"varint,4,opt,name=pin_protection,json=pinProtection" json:"pin_protection,omitempty"`
+	Language             *string `protobuf:"bytes,5,opt,name=language,def=english" json:"language,omitempty"`
+	Label                *string `protobuf:"bytes,6,opt,name=label" json:"label,omitempty"`
+	U2FCounter           *uint32 `protobuf:"varint,7,opt,name=u2f_counter,json=u2fCounter" json:"u2f_counter,omitempty"`
+	SkipBackup           *bool   `protobuf:"varint,8,opt,name=skip_backup,json=skipBackup" json:"skip_backup,omitempty"`
+	XXX_unrecognized     []byte  `json:"-"`
+}
+
+func (m *ResetDevice) Reset()                    { *m = ResetDevice{} }
+func (m *ResetDevice) String() string            { return proto.CompactTextString(m) }
+func (*ResetDevice) ProtoMessage()               {}
+func (*ResetDevice) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{27} }
+
+const Default_ResetDevice_Strength uint32 = 256
+const Default_ResetDevice_Language string = "english"
+
+func (m *ResetDevice) GetDisplayRandom() bool {
+	if m != nil && m.DisplayRandom != nil {
+		return *m.DisplayRandom
+	}
+	return false
+}
+
+func (m *ResetDevice) GetStrength() uint32 {
+	if m != nil && m.Strength != nil {
+		return *m.Strength
+	}
+	return Default_ResetDevice_Strength
+}
+
+func (m *ResetDevice) GetPassphraseProtection() bool {
+	if m != nil && m.PassphraseProtection != nil {
+		return *m.PassphraseProtection
+	}
+	return false
+}
+
+func (m *ResetDevice) GetPinProtection() bool {
+	if m != nil && m.PinProtection != nil {
+		return *m.PinProtection
+	}
+	return false
+}
+
+func (m *ResetDevice) GetLanguage() string {
+	if m != nil && m.Language != nil {
+		return *m.Language
+	}
+	return Default_ResetDevice_Language
+}
+
+func (m *ResetDevice) GetLabel() string {
+	if m != nil && m.Label != nil {
+		return *m.Label
+	}
+	return ""
+}
+
+func (m *ResetDevice) GetU2FCounter() uint32 {
+	if m != nil && m.U2FCounter != nil {
+		return *m.U2FCounter
+	}
+	return 0
+}
+
+func (m *ResetDevice) GetSkipBackup() bool {
+	if m != nil && m.SkipBackup != nil {
+		return *m.SkipBackup
+	}
+	return false
+}
+
+// *
+// Request: Perform backup of the device seed if not backed up using ResetDevice
+// @next ButtonRequest
+type BackupDevice struct {
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *BackupDevice) Reset()                    { *m = BackupDevice{} }
+func (m *BackupDevice) String() string            { return proto.CompactTextString(m) }
+func (*BackupDevice) ProtoMessage()               {}
+func (*BackupDevice) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{28} }
+
+// *
+// Response: Ask for additional entropy from host computer
+// @prev ResetDevice
+// @next EntropyAck
+type EntropyRequest struct {
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *EntropyRequest) Reset()                    { *m = EntropyRequest{} }
+func (m *EntropyRequest) String() string            { return proto.CompactTextString(m) }
+func (*EntropyRequest) ProtoMessage()               {}
+func (*EntropyRequest) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{29} }
+
+// *
+// Request: Provide additional entropy for seed generation function
+// @prev EntropyRequest
+// @next ButtonRequest
+type EntropyAck struct {
+	Entropy          []byte `protobuf:"bytes,1,opt,name=entropy" json:"entropy,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *EntropyAck) Reset()                    { *m = EntropyAck{} }
+func (m *EntropyAck) String() string            { return proto.CompactTextString(m) }
+func (*EntropyAck) ProtoMessage()               {}
+func (*EntropyAck) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{30} }
+
+func (m *EntropyAck) GetEntropy() []byte {
+	if m != nil {
+		return m.Entropy
+	}
+	return nil
+}
+
+// *
+// Request: Start recovery workflow asking user for specific words of mnemonic
+// Used to recovery device safely even on untrusted computer.
+// @next WordRequest
+type RecoveryDevice struct {
+	WordCount            *uint32 `protobuf:"varint,1,opt,name=word_count,json=wordCount" json:"word_count,omitempty"`
+	PassphraseProtection *bool   `protobuf:"varint,2,opt,name=passphrase_protection,json=passphraseProtection" json:"passphrase_protection,omitempty"`
+	PinProtection        *bool   `protobuf:"varint,3,opt,name=pin_protection,json=pinProtection" json:"pin_protection,omitempty"`
+	Language             *string `protobuf:"bytes,4,opt,name=language,def=english" json:"language,omitempty"`
+	Label                *string `protobuf:"bytes,5,opt,name=label" json:"label,omitempty"`
+	EnforceWordlist      *bool   `protobuf:"varint,6,opt,name=enforce_wordlist,json=enforceWordlist" json:"enforce_wordlist,omitempty"`
+	// 7 reserved for unused recovery method
+	Type             *uint32 `protobuf:"varint,8,opt,name=type" json:"type,omitempty"`
+	U2FCounter       *uint32 `protobuf:"varint,9,opt,name=u2f_counter,json=u2fCounter" json:"u2f_counter,omitempty"`
+	DryRun           *bool   `protobuf:"varint,10,opt,name=dry_run,json=dryRun" json:"dry_run,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *RecoveryDevice) Reset()                    { *m = RecoveryDevice{} }
+func (m *RecoveryDevice) String() string            { return proto.CompactTextString(m) }
+func (*RecoveryDevice) ProtoMessage()               {}
+func (*RecoveryDevice) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{31} }
+
+const Default_RecoveryDevice_Language string = "english"
+
+func (m *RecoveryDevice) GetWordCount() uint32 {
+	if m != nil && m.WordCount != nil {
+		return *m.WordCount
+	}
+	return 0
+}
+
+func (m *RecoveryDevice) GetPassphraseProtection() bool {
+	if m != nil && m.PassphraseProtection != nil {
+		return *m.PassphraseProtection
+	}
+	return false
+}
+
+func (m *RecoveryDevice) GetPinProtection() bool {
+	if m != nil && m.PinProtection != nil {
+		return *m.PinProtection
+	}
+	return false
+}
+
+func (m *RecoveryDevice) GetLanguage() string {
+	if m != nil && m.Language != nil {
+		return *m.Language
+	}
+	return Default_RecoveryDevice_Language
+}
+
+func (m *RecoveryDevice) GetLabel() string {
+	if m != nil && m.Label != nil {
+		return *m.Label
+	}
+	return ""
+}
+
+func (m *RecoveryDevice) GetEnforceWordlist() bool {
+	if m != nil && m.EnforceWordlist != nil {
+		return *m.EnforceWordlist
+	}
+	return false
+}
+
+func (m *RecoveryDevice) GetType() uint32 {
+	if m != nil && m.Type != nil {
+		return *m.Type
+	}
+	return 0
+}
+
+func (m *RecoveryDevice) GetU2FCounter() uint32 {
+	if m != nil && m.U2FCounter != nil {
+		return *m.U2FCounter
+	}
+	return 0
+}
+
+func (m *RecoveryDevice) GetDryRun() bool {
+	if m != nil && m.DryRun != nil {
+		return *m.DryRun
+	}
+	return false
+}
+
+// *
+// Response: Device is waiting for user to enter word of the mnemonic
+// Its position is shown only on device's internal display.
+// @prev RecoveryDevice
+// @prev WordAck
+type WordRequest struct {
+	Type             *WordRequestType `protobuf:"varint,1,opt,name=type,enum=WordRequestType" json:"type,omitempty"`
+	XXX_unrecognized []byte           `json:"-"`
+}
+
+func (m *WordRequest) Reset()                    { *m = WordRequest{} }
+func (m *WordRequest) String() string            { return proto.CompactTextString(m) }
+func (*WordRequest) ProtoMessage()               {}
+func (*WordRequest) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{32} }
+
+func (m *WordRequest) GetType() WordRequestType {
+	if m != nil && m.Type != nil {
+		return *m.Type
+	}
+	return WordRequestType_WordRequestType_Plain
+}
+
+// *
+// Request: Computer replies with word from the mnemonic
+// @prev WordRequest
+// @next WordRequest
+// @next Success
+// @next Failure
+type WordAck struct {
+	Word             *string `protobuf:"bytes,1,req,name=word" json:"word,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *WordAck) Reset()                    { *m = WordAck{} }
+func (m *WordAck) String() string            { return proto.CompactTextString(m) }
+func (*WordAck) ProtoMessage()               {}
+func (*WordAck) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{33} }
+
+func (m *WordAck) GetWord() string {
+	if m != nil && m.Word != nil {
+		return *m.Word
+	}
+	return ""
+}
+
+// *
+// Request: Ask device to sign message
+// @next MessageSignature
+// @next Failure
+type SignMessage struct {
+	AddressN         []uint32         `protobuf:"varint,1,rep,name=address_n,json=addressN" json:"address_n,omitempty"`
+	Message          []byte           `protobuf:"bytes,2,req,name=message" json:"message,omitempty"`
+	CoinName         *string          `protobuf:"bytes,3,opt,name=coin_name,json=coinName,def=Bitcoin" json:"coin_name,omitempty"`
+	ScriptType       *InputScriptType `protobuf:"varint,4,opt,name=script_type,json=scriptType,enum=InputScriptType,def=0" json:"script_type,omitempty"`
+	XXX_unrecognized []byte           `json:"-"`
+}
+
+func (m *SignMessage) Reset()                    { *m = SignMessage{} }
+func (m *SignMessage) String() string            { return proto.CompactTextString(m) }
+func (*SignMessage) ProtoMessage()               {}
+func (*SignMessage) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{34} }
+
+const Default_SignMessage_CoinName string = "Bitcoin"
+const Default_SignMessage_ScriptType InputScriptType = InputScriptType_SPENDADDRESS
+
+func (m *SignMessage) GetAddressN() []uint32 {
+	if m != nil {
+		return m.AddressN
+	}
+	return nil
+}
+
+func (m *SignMessage) GetMessage() []byte {
+	if m != nil {
+		return m.Message
+	}
+	return nil
+}
+
+func (m *SignMessage) GetCoinName() string {
+	if m != nil && m.CoinName != nil {
+		return *m.CoinName
+	}
+	return Default_SignMessage_CoinName
+}
+
+func (m *SignMessage) GetScriptType() InputScriptType {
+	if m != nil && m.ScriptType != nil {
+		return *m.ScriptType
+	}
+	return Default_SignMessage_ScriptType
+}
+
+// *
+// Request: Ask device to verify message
+// @next Success
+// @next Failure
+type VerifyMessage struct {
+	Address          *string `protobuf:"bytes,1,opt,name=address" json:"address,omitempty"`
+	Signature        []byte  `protobuf:"bytes,2,opt,name=signature" json:"signature,omitempty"`
+	Message          []byte  `protobuf:"bytes,3,opt,name=message" json:"message,omitempty"`
+	CoinName         *string `protobuf:"bytes,4,opt,name=coin_name,json=coinName,def=Bitcoin" json:"coin_name,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *VerifyMessage) Reset()                    { *m = VerifyMessage{} }
+func (m *VerifyMessage) String() string            { return proto.CompactTextString(m) }
+func (*VerifyMessage) ProtoMessage()               {}
+func (*VerifyMessage) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{35} }
+
+const Default_VerifyMessage_CoinName string = "Bitcoin"
+
+func (m *VerifyMessage) GetAddress() string {
+	if m != nil && m.Address != nil {
+		return *m.Address
+	}
+	return ""
+}
+
+func (m *VerifyMessage) GetSignature() []byte {
+	if m != nil {
+		return m.Signature
+	}
+	return nil
+}
+
+func (m *VerifyMessage) GetMessage() []byte {
+	if m != nil {
+		return m.Message
+	}
+	return nil
+}
+
+func (m *VerifyMessage) GetCoinName() string {
+	if m != nil && m.CoinName != nil {
+		return *m.CoinName
+	}
+	return Default_VerifyMessage_CoinName
+}
+
+// *
+// Response: Signed message
+// @prev SignMessage
+type MessageSignature struct {
+	Address          *string `protobuf:"bytes,1,opt,name=address" json:"address,omitempty"`
+	Signature        []byte  `protobuf:"bytes,2,opt,name=signature" json:"signature,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *MessageSignature) Reset()                    { *m = MessageSignature{} }
+func (m *MessageSignature) String() string            { return proto.CompactTextString(m) }
+func (*MessageSignature) ProtoMessage()               {}
+func (*MessageSignature) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{36} }
+
+func (m *MessageSignature) GetAddress() string {
+	if m != nil && m.Address != nil {
+		return *m.Address
+	}
+	return ""
+}
+
+func (m *MessageSignature) GetSignature() []byte {
+	if m != nil {
+		return m.Signature
+	}
+	return nil
+}
+
+// *
+// Request: Ask device to encrypt message
+// @next EncryptedMessage
+// @next Failure
+type EncryptMessage struct {
+	Pubkey           []byte   `protobuf:"bytes,1,opt,name=pubkey" json:"pubkey,omitempty"`
+	Message          []byte   `protobuf:"bytes,2,opt,name=message" json:"message,omitempty"`
+	DisplayOnly      *bool    `protobuf:"varint,3,opt,name=display_only,json=displayOnly" json:"display_only,omitempty"`
+	AddressN         []uint32 `protobuf:"varint,4,rep,name=address_n,json=addressN" json:"address_n,omitempty"`
+	CoinName         *string  `protobuf:"bytes,5,opt,name=coin_name,json=coinName,def=Bitcoin" json:"coin_name,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *EncryptMessage) Reset()                    { *m = EncryptMessage{} }
+func (m *EncryptMessage) String() string            { return proto.CompactTextString(m) }
+func (*EncryptMessage) ProtoMessage()               {}
+func (*EncryptMessage) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{37} }
+
+const Default_EncryptMessage_CoinName string = "Bitcoin"
+
+func (m *EncryptMessage) GetPubkey() []byte {
+	if m != nil {
+		return m.Pubkey
+	}
+	return nil
+}
+
+func (m *EncryptMessage) GetMessage() []byte {
+	if m != nil {
+		return m.Message
+	}
+	return nil
+}
+
+func (m *EncryptMessage) GetDisplayOnly() bool {
+	if m != nil && m.DisplayOnly != nil {
+		return *m.DisplayOnly
+	}
+	return false
+}
+
+func (m *EncryptMessage) GetAddressN() []uint32 {
+	if m != nil {
+		return m.AddressN
+	}
+	return nil
+}
+
+func (m *EncryptMessage) GetCoinName() string {
+	if m != nil && m.CoinName != nil {
+		return *m.CoinName
+	}
+	return Default_EncryptMessage_CoinName
+}
+
+// *
+// Response: Encrypted message
+// @prev EncryptMessage
+type EncryptedMessage struct {
+	Nonce            []byte `protobuf:"bytes,1,opt,name=nonce" json:"nonce,omitempty"`
+	Message          []byte `protobuf:"bytes,2,opt,name=message" json:"message,omitempty"`
+	Hmac             []byte `protobuf:"bytes,3,opt,name=hmac" json:"hmac,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *EncryptedMessage) Reset()                    { *m = EncryptedMessage{} }
+func (m *EncryptedMessage) String() string            { return proto.CompactTextString(m) }
+func (*EncryptedMessage) ProtoMessage()               {}
+func (*EncryptedMessage) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{38} }
+
+func (m *EncryptedMessage) GetNonce() []byte {
+	if m != nil {
+		return m.Nonce
+	}
+	return nil
+}
+
+func (m *EncryptedMessage) GetMessage() []byte {
+	if m != nil {
+		return m.Message
+	}
+	return nil
+}
+
+func (m *EncryptedMessage) GetHmac() []byte {
+	if m != nil {
+		return m.Hmac
+	}
+	return nil
+}
+
+// *
+// Request: Ask device to decrypt message
+// @next Success
+// @next Failure
+type DecryptMessage struct {
+	AddressN         []uint32 `protobuf:"varint,1,rep,name=address_n,json=addressN" json:"address_n,omitempty"`
+	Nonce            []byte   `protobuf:"bytes,2,opt,name=nonce" json:"nonce,omitempty"`
+	Message          []byte   `protobuf:"bytes,3,opt,name=message" json:"message,omitempty"`
+	Hmac             []byte   `protobuf:"bytes,4,opt,name=hmac" json:"hmac,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *DecryptMessage) Reset()                    { *m = DecryptMessage{} }
+func (m *DecryptMessage) String() string            { return proto.CompactTextString(m) }
+func (*DecryptMessage) ProtoMessage()               {}
+func (*DecryptMessage) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{39} }
+
+func (m *DecryptMessage) GetAddressN() []uint32 {
+	if m != nil {
+		return m.AddressN
+	}
+	return nil
+}
+
+func (m *DecryptMessage) GetNonce() []byte {
+	if m != nil {
+		return m.Nonce
+	}
+	return nil
+}
+
+func (m *DecryptMessage) GetMessage() []byte {
+	if m != nil {
+		return m.Message
+	}
+	return nil
+}
+
+func (m *DecryptMessage) GetHmac() []byte {
+	if m != nil {
+		return m.Hmac
+	}
+	return nil
+}
+
+// *
+// Response: Decrypted message
+// @prev DecryptedMessage
+type DecryptedMessage struct {
+	Message          []byte  `protobuf:"bytes,1,opt,name=message" json:"message,omitempty"`
+	Address          *string `protobuf:"bytes,2,opt,name=address" json:"address,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *DecryptedMessage) Reset()                    { *m = DecryptedMessage{} }
+func (m *DecryptedMessage) String() string            { return proto.CompactTextString(m) }
+func (*DecryptedMessage) ProtoMessage()               {}
+func (*DecryptedMessage) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{40} }
+
+func (m *DecryptedMessage) GetMessage() []byte {
+	if m != nil {
+		return m.Message
+	}
+	return nil
+}
+
+func (m *DecryptedMessage) GetAddress() string {
+	if m != nil && m.Address != nil {
+		return *m.Address
+	}
+	return ""
+}
+
+// *
+// Request: Ask device to encrypt or decrypt value of given key
+// @next CipheredKeyValue
+// @next Failure
+type CipherKeyValue struct {
+	AddressN         []uint32 `protobuf:"varint,1,rep,name=address_n,json=addressN" json:"address_n,omitempty"`
+	Key              *string  `protobuf:"bytes,2,opt,name=key" json:"key,omitempty"`
+	Value            []byte   `protobuf:"bytes,3,opt,name=value" json:"value,omitempty"`
+	Encrypt          *bool    `protobuf:"varint,4,opt,name=encrypt" json:"encrypt,omitempty"`
+	AskOnEncrypt     *bool    `protobuf:"varint,5,opt,name=ask_on_encrypt,json=askOnEncrypt" json:"ask_on_encrypt,omitempty"`
+	AskOnDecrypt     *bool    `protobuf:"varint,6,opt,name=ask_on_decrypt,json=askOnDecrypt" json:"ask_on_decrypt,omitempty"`
+	Iv               []byte   `protobuf:"bytes,7,opt,name=iv" json:"iv,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *CipherKeyValue) Reset()                    { *m = CipherKeyValue{} }
+func (m *CipherKeyValue) String() string            { return proto.CompactTextString(m) }
+func (*CipherKeyValue) ProtoMessage()               {}
+func (*CipherKeyValue) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{41} }
+
+func (m *CipherKeyValue) GetAddressN() []uint32 {
+	if m != nil {
+		return m.AddressN
+	}
+	return nil
+}
+
+func (m *CipherKeyValue) GetKey() string {
+	if m != nil && m.Key != nil {
+		return *m.Key
+	}
+	return ""
+}
+
+func (m *CipherKeyValue) GetValue() []byte {
+	if m != nil {
+		return m.Value
+	}
+	return nil
+}
+
+func (m *CipherKeyValue) GetEncrypt() bool {
+	if m != nil && m.Encrypt != nil {
+		return *m.Encrypt
+	}
+	return false
+}
+
+func (m *CipherKeyValue) GetAskOnEncrypt() bool {
+	if m != nil && m.AskOnEncrypt != nil {
+		return *m.AskOnEncrypt
+	}
+	return false
+}
+
+func (m *CipherKeyValue) GetAskOnDecrypt() bool {
+	if m != nil && m.AskOnDecrypt != nil {
+		return *m.AskOnDecrypt
+	}
+	return false
+}
+
+func (m *CipherKeyValue) GetIv() []byte {
+	if m != nil {
+		return m.Iv
+	}
+	return nil
+}
+
+// *
+// Response: Return ciphered/deciphered value
+// @prev CipherKeyValue
+type CipheredKeyValue struct {
+	Value            []byte `protobuf:"bytes,1,opt,name=value" json:"value,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *CipheredKeyValue) Reset()                    { *m = CipheredKeyValue{} }
+func (m *CipheredKeyValue) String() string            { return proto.CompactTextString(m) }
+func (*CipheredKeyValue) ProtoMessage()               {}
+func (*CipheredKeyValue) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{42} }
+
+func (m *CipheredKeyValue) GetValue() []byte {
+	if m != nil {
+		return m.Value
+	}
+	return nil
+}
+
+// *
+// Request: Estimated size of the transaction
+// This behaves exactly like SignTx, which means that it can ask using TxRequest
+// This call is non-blocking (except possible PassphraseRequest to unlock the seed)
+// @next TxSize
+// @next Failure
+type EstimateTxSize struct {
+	OutputsCount     *uint32 `protobuf:"varint,1,req,name=outputs_count,json=outputsCount" json:"outputs_count,omitempty"`
+	InputsCount      *uint32 `protobuf:"varint,2,req,name=inputs_count,json=inputsCount" json:"inputs_count,omitempty"`
+	CoinName         *string `protobuf:"bytes,3,opt,name=coin_name,json=coinName,def=Bitcoin" json:"coin_name,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *EstimateTxSize) Reset()                    { *m = EstimateTxSize{} }
+func (m *EstimateTxSize) String() string            { return proto.CompactTextString(m) }
+func (*EstimateTxSize) ProtoMessage()               {}
+func (*EstimateTxSize) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{43} }
+
+const Default_EstimateTxSize_CoinName string = "Bitcoin"
+
+func (m *EstimateTxSize) GetOutputsCount() uint32 {
+	if m != nil && m.OutputsCount != nil {
+		return *m.OutputsCount
+	}
+	return 0
+}
+
+func (m *EstimateTxSize) GetInputsCount() uint32 {
+	if m != nil && m.InputsCount != nil {
+		return *m.InputsCount
+	}
+	return 0
+}
+
+func (m *EstimateTxSize) GetCoinName() string {
+	if m != nil && m.CoinName != nil {
+		return *m.CoinName
+	}
+	return Default_EstimateTxSize_CoinName
+}
+
+// *
+// Response: Estimated size of the transaction
+// @prev EstimateTxSize
+type TxSize struct {
+	TxSize           *uint32 `protobuf:"varint,1,opt,name=tx_size,json=txSize" json:"tx_size,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *TxSize) Reset()                    { *m = TxSize{} }
+func (m *TxSize) String() string            { return proto.CompactTextString(m) }
+func (*TxSize) ProtoMessage()               {}
+func (*TxSize) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{44} }
+
+func (m *TxSize) GetTxSize() uint32 {
+	if m != nil && m.TxSize != nil {
+		return *m.TxSize
+	}
+	return 0
+}
+
+// *
+// Request: Ask device to sign transaction
+// @next PassphraseRequest
+// @next PinMatrixRequest
+// @next TxRequest
+// @next Failure
+type SignTx struct {
+	OutputsCount     *uint32 `protobuf:"varint,1,req,name=outputs_count,json=outputsCount" json:"outputs_count,omitempty"`
+	InputsCount      *uint32 `protobuf:"varint,2,req,name=inputs_count,json=inputsCount" json:"inputs_count,omitempty"`
+	CoinName         *string `protobuf:"bytes,3,opt,name=coin_name,json=coinName,def=Bitcoin" json:"coin_name,omitempty"`
+	Version          *uint32 `protobuf:"varint,4,opt,name=version,def=1" json:"version,omitempty"`
+	LockTime         *uint32 `protobuf:"varint,5,opt,name=lock_time,json=lockTime,def=0" json:"lock_time,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *SignTx) Reset()                    { *m = SignTx{} }
+func (m *SignTx) String() string            { return proto.CompactTextString(m) }
+func (*SignTx) ProtoMessage()               {}
+func (*SignTx) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{45} }
+
+const Default_SignTx_CoinName string = "Bitcoin"
+const Default_SignTx_Version uint32 = 1
+const Default_SignTx_LockTime uint32 = 0
+
+func (m *SignTx) GetOutputsCount() uint32 {
+	if m != nil && m.OutputsCount != nil {
+		return *m.OutputsCount
+	}
+	return 0
+}
+
+func (m *SignTx) GetInputsCount() uint32 {
+	if m != nil && m.InputsCount != nil {
+		return *m.InputsCount
+	}
+	return 0
+}
+
+func (m *SignTx) GetCoinName() string {
+	if m != nil && m.CoinName != nil {
+		return *m.CoinName
+	}
+	return Default_SignTx_CoinName
+}
+
+func (m *SignTx) GetVersion() uint32 {
+	if m != nil && m.Version != nil {
+		return *m.Version
+	}
+	return Default_SignTx_Version
+}
+
+func (m *SignTx) GetLockTime() uint32 {
+	if m != nil && m.LockTime != nil {
+		return *m.LockTime
+	}
+	return Default_SignTx_LockTime
+}
+
+// *
+// Request: Simplified transaction signing
+// This method doesn't support streaming, so there are hardware limits in number of inputs and outputs.
+// In case of success, the result is returned using TxRequest message.
+// @next PassphraseRequest
+// @next PinMatrixRequest
+// @next TxRequest
+// @next Failure
+type SimpleSignTx struct {
+	Inputs           []*TxInputType     `protobuf:"bytes,1,rep,name=inputs" json:"inputs,omitempty"`
+	Outputs          []*TxOutputType    `protobuf:"bytes,2,rep,name=outputs" json:"outputs,omitempty"`
+	Transactions     []*TransactionType `protobuf:"bytes,3,rep,name=transactions" json:"transactions,omitempty"`
+	CoinName         *string            `protobuf:"bytes,4,opt,name=coin_name,json=coinName,def=Bitcoin" json:"coin_name,omitempty"`
+	Version          *uint32            `protobuf:"varint,5,opt,name=version,def=1" json:"version,omitempty"`
+	LockTime         *uint32            `protobuf:"varint,6,opt,name=lock_time,json=lockTime,def=0" json:"lock_time,omitempty"`
+	XXX_unrecognized []byte             `json:"-"`
+}
+
+func (m *SimpleSignTx) Reset()                    { *m = SimpleSignTx{} }
+func (m *SimpleSignTx) String() string            { return proto.CompactTextString(m) }
+func (*SimpleSignTx) ProtoMessage()               {}
+func (*SimpleSignTx) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{46} }
+
+const Default_SimpleSignTx_CoinName string = "Bitcoin"
+const Default_SimpleSignTx_Version uint32 = 1
+const Default_SimpleSignTx_LockTime uint32 = 0
+
+func (m *SimpleSignTx) GetInputs() []*TxInputType {
+	if m != nil {
+		return m.Inputs
+	}
+	return nil
+}
+
+func (m *SimpleSignTx) GetOutputs() []*TxOutputType {
+	if m != nil {
+		return m.Outputs
+	}
+	return nil
+}
+
+func (m *SimpleSignTx) GetTransactions() []*TransactionType {
+	if m != nil {
+		return m.Transactions
+	}
+	return nil
+}
+
+func (m *SimpleSignTx) GetCoinName() string {
+	if m != nil && m.CoinName != nil {
+		return *m.CoinName
+	}
+	return Default_SimpleSignTx_CoinName
+}
+
+func (m *SimpleSignTx) GetVersion() uint32 {
+	if m != nil && m.Version != nil {
+		return *m.Version
+	}
+	return Default_SimpleSignTx_Version
+}
+
+func (m *SimpleSignTx) GetLockTime() uint32 {
+	if m != nil && m.LockTime != nil {
+		return *m.LockTime
+	}
+	return Default_SimpleSignTx_LockTime
+}
+
+// *
+// Response: Device asks for information for signing transaction or returns the last result
+// If request_index is set, device awaits TxAck message (with fields filled in according to request_type)
+// If signature_index is set, 'signature' contains signed input of signature_index's input
+// @prev SignTx
+// @prev SimpleSignTx
+// @prev TxAck
+type TxRequest struct {
+	RequestType      *RequestType             `protobuf:"varint,1,opt,name=request_type,json=requestType,enum=RequestType" json:"request_type,omitempty"`
+	Details          *TxRequestDetailsType    `protobuf:"bytes,2,opt,name=details" json:"details,omitempty"`
+	Serialized       *TxRequestSerializedType `protobuf:"bytes,3,opt,name=serialized" json:"serialized,omitempty"`
+	XXX_unrecognized []byte                   `json:"-"`
+}
+
+func (m *TxRequest) Reset()                    { *m = TxRequest{} }
+func (m *TxRequest) String() string            { return proto.CompactTextString(m) }
+func (*TxRequest) ProtoMessage()               {}
+func (*TxRequest) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{47} }
+
+func (m *TxRequest) GetRequestType() RequestType {
+	if m != nil && m.RequestType != nil {
+		return *m.RequestType
+	}
+	return RequestType_TXINPUT
+}
+
+func (m *TxRequest) GetDetails() *TxRequestDetailsType {
+	if m != nil {
+		return m.Details
+	}
+	return nil
+}
+
+func (m *TxRequest) GetSerialized() *TxRequestSerializedType {
+	if m != nil {
+		return m.Serialized
+	}
+	return nil
+}
+
+// *
+// Request: Reported transaction data
+// @prev TxRequest
+// @next TxRequest
+type TxAck struct {
+	Tx               *TransactionType `protobuf:"bytes,1,opt,name=tx" json:"tx,omitempty"`
+	XXX_unrecognized []byte           `json:"-"`
+}
+
+func (m *TxAck) Reset()                    { *m = TxAck{} }
+func (m *TxAck) String() string            { return proto.CompactTextString(m) }
+func (*TxAck) ProtoMessage()               {}
+func (*TxAck) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{48} }
+
+func (m *TxAck) GetTx() *TransactionType {
+	if m != nil {
+		return m.Tx
+	}
+	return nil
+}
+
+// *
+// Request: Ask device to sign transaction
+// All fields are optional from the protocol's point of view. Each field defaults to value `0` if missing.
+// Note: the first at most 1024 bytes of data MUST be transmitted as part of this message.
+// @next PassphraseRequest
+// @next PinMatrixRequest
+// @next EthereumTxRequest
+// @next Failure
+type EthereumSignTx struct {
+	AddressN         []uint32 `protobuf:"varint,1,rep,name=address_n,json=addressN" json:"address_n,omitempty"`
+	Nonce            []byte   `protobuf:"bytes,2,opt,name=nonce" json:"nonce,omitempty"`
+	GasPrice         []byte   `protobuf:"bytes,3,opt,name=gas_price,json=gasPrice" json:"gas_price,omitempty"`
+	GasLimit         []byte   `protobuf:"bytes,4,opt,name=gas_limit,json=gasLimit" json:"gas_limit,omitempty"`
+	To               []byte   `protobuf:"bytes,5,opt,name=to" json:"to,omitempty"`
+	Value            []byte   `protobuf:"bytes,6,opt,name=value" json:"value,omitempty"`
+	DataInitialChunk []byte   `protobuf:"bytes,7,opt,name=data_initial_chunk,json=dataInitialChunk" json:"data_initial_chunk,omitempty"`
+	DataLength       *uint32  `protobuf:"varint,8,opt,name=data_length,json=dataLength" json:"data_length,omitempty"`
+	ChainId          *uint32  `protobuf:"varint,9,opt,name=chain_id,json=chainId" json:"chain_id,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *EthereumSignTx) Reset()                    { *m = EthereumSignTx{} }
+func (m *EthereumSignTx) String() string            { return proto.CompactTextString(m) }
+func (*EthereumSignTx) ProtoMessage()               {}
+func (*EthereumSignTx) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{49} }
+
+func (m *EthereumSignTx) GetAddressN() []uint32 {
+	if m != nil {
+		return m.AddressN
+	}
+	return nil
+}
+
+func (m *EthereumSignTx) GetNonce() []byte {
+	if m != nil {
+		return m.Nonce
+	}
+	return nil
+}
+
+func (m *EthereumSignTx) GetGasPrice() []byte {
+	if m != nil {
+		return m.GasPrice
+	}
+	return nil
+}
+
+func (m *EthereumSignTx) GetGasLimit() []byte {
+	if m != nil {
+		return m.GasLimit
+	}
+	return nil
+}
+
+func (m *EthereumSignTx) GetTo() []byte {
+	if m != nil {
+		return m.To
+	}
+	return nil
+}
+
+func (m *EthereumSignTx) GetValue() []byte {
+	if m != nil {
+		return m.Value
+	}
+	return nil
+}
+
+func (m *EthereumSignTx) GetDataInitialChunk() []byte {
+	if m != nil {
+		return m.DataInitialChunk
+	}
+	return nil
+}
+
+func (m *EthereumSignTx) GetDataLength() uint32 {
+	if m != nil && m.DataLength != nil {
+		return *m.DataLength
+	}
+	return 0
+}
+
+func (m *EthereumSignTx) GetChainId() uint32 {
+	if m != nil && m.ChainId != nil {
+		return *m.ChainId
+	}
+	return 0
+}
+
+// *
+// Response: Device asks for more data from transaction payload, or returns the signature.
+// If data_length is set, device awaits that many more bytes of payload.
+// Otherwise, the signature_* fields contain the computed transaction signature. All three fields will be present.
+// @prev EthereumSignTx
+// @next EthereumTxAck
+type EthereumTxRequest struct {
+	DataLength       *uint32 `protobuf:"varint,1,opt,name=data_length,json=dataLength" json:"data_length,omitempty"`
+	SignatureV       *uint32 `protobuf:"varint,2,opt,name=signature_v,json=signatureV" json:"signature_v,omitempty"`
+	SignatureR       []byte  `protobuf:"bytes,3,opt,name=signature_r,json=signatureR" json:"signature_r,omitempty"`
+	SignatureS       []byte  `protobuf:"bytes,4,opt,name=signature_s,json=signatureS" json:"signature_s,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *EthereumTxRequest) Reset()                    { *m = EthereumTxRequest{} }
+func (m *EthereumTxRequest) String() string            { return proto.CompactTextString(m) }
+func (*EthereumTxRequest) ProtoMessage()               {}
+func (*EthereumTxRequest) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{50} }
+
+func (m *EthereumTxRequest) GetDataLength() uint32 {
+	if m != nil && m.DataLength != nil {
+		return *m.DataLength
+	}
+	return 0
+}
+
+func (m *EthereumTxRequest) GetSignatureV() uint32 {
+	if m != nil && m.SignatureV != nil {
+		return *m.SignatureV
+	}
+	return 0
+}
+
+func (m *EthereumTxRequest) GetSignatureR() []byte {
+	if m != nil {
+		return m.SignatureR
+	}
+	return nil
+}
+
+func (m *EthereumTxRequest) GetSignatureS() []byte {
+	if m != nil {
+		return m.SignatureS
+	}
+	return nil
+}
+
+// *
+// Request: Transaction payload data.
+// @prev EthereumTxRequest
+// @next EthereumTxRequest
+type EthereumTxAck struct {
+	DataChunk        []byte `protobuf:"bytes,1,opt,name=data_chunk,json=dataChunk" json:"data_chunk,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *EthereumTxAck) Reset()                    { *m = EthereumTxAck{} }
+func (m *EthereumTxAck) String() string            { return proto.CompactTextString(m) }
+func (*EthereumTxAck) ProtoMessage()               {}
+func (*EthereumTxAck) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{51} }
+
+func (m *EthereumTxAck) GetDataChunk() []byte {
+	if m != nil {
+		return m.DataChunk
+	}
+	return nil
+}
+
+// *
+// Request: Ask device to sign message
+// @next EthereumMessageSignature
+// @next Failure
+type EthereumSignMessage struct {
+	AddressN         []uint32 `protobuf:"varint,1,rep,name=address_n,json=addressN" json:"address_n,omitempty"`
+	Message          []byte   `protobuf:"bytes,2,req,name=message" json:"message,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *EthereumSignMessage) Reset()                    { *m = EthereumSignMessage{} }
+func (m *EthereumSignMessage) String() string            { return proto.CompactTextString(m) }
+func (*EthereumSignMessage) ProtoMessage()               {}
+func (*EthereumSignMessage) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{52} }
+
+func (m *EthereumSignMessage) GetAddressN() []uint32 {
+	if m != nil {
+		return m.AddressN
+	}
+	return nil
+}
+
+func (m *EthereumSignMessage) GetMessage() []byte {
+	if m != nil {
+		return m.Message
+	}
+	return nil
+}
+
+// *
+// Request: Ask device to verify message
+// @next Success
+// @next Failure
+type EthereumVerifyMessage struct {
+	Address          []byte `protobuf:"bytes,1,opt,name=address" json:"address,omitempty"`
+	Signature        []byte `protobuf:"bytes,2,opt,name=signature" json:"signature,omitempty"`
+	Message          []byte `protobuf:"bytes,3,opt,name=message" json:"message,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *EthereumVerifyMessage) Reset()                    { *m = EthereumVerifyMessage{} }
+func (m *EthereumVerifyMessage) String() string            { return proto.CompactTextString(m) }
+func (*EthereumVerifyMessage) ProtoMessage()               {}
+func (*EthereumVerifyMessage) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{53} }
+
+func (m *EthereumVerifyMessage) GetAddress() []byte {
+	if m != nil {
+		return m.Address
+	}
+	return nil
+}
+
+func (m *EthereumVerifyMessage) GetSignature() []byte {
+	if m != nil {
+		return m.Signature
+	}
+	return nil
+}
+
+func (m *EthereumVerifyMessage) GetMessage() []byte {
+	if m != nil {
+		return m.Message
+	}
+	return nil
+}
+
+// *
+// Response: Signed message
+// @prev EthereumSignMessage
+type EthereumMessageSignature struct {
+	Address          []byte `protobuf:"bytes,1,opt,name=address" json:"address,omitempty"`
+	Signature        []byte `protobuf:"bytes,2,opt,name=signature" json:"signature,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *EthereumMessageSignature) Reset()                    { *m = EthereumMessageSignature{} }
+func (m *EthereumMessageSignature) String() string            { return proto.CompactTextString(m) }
+func (*EthereumMessageSignature) ProtoMessage()               {}
+func (*EthereumMessageSignature) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{54} }
+
+func (m *EthereumMessageSignature) GetAddress() []byte {
+	if m != nil {
+		return m.Address
+	}
+	return nil
+}
+
+func (m *EthereumMessageSignature) GetSignature() []byte {
+	if m != nil {
+		return m.Signature
+	}
+	return nil
+}
+
+// *
+// Request: Ask device to sign identity
+// @next SignedIdentity
+// @next Failure
+type SignIdentity struct {
+	Identity         *IdentityType `protobuf:"bytes,1,opt,name=identity" json:"identity,omitempty"`
+	ChallengeHidden  []byte        `protobuf:"bytes,2,opt,name=challenge_hidden,json=challengeHidden" json:"challenge_hidden,omitempty"`
+	ChallengeVisual  *string       `protobuf:"bytes,3,opt,name=challenge_visual,json=challengeVisual" json:"challenge_visual,omitempty"`
+	EcdsaCurveName   *string       `protobuf:"bytes,4,opt,name=ecdsa_curve_name,json=ecdsaCurveName" json:"ecdsa_curve_name,omitempty"`
+	XXX_unrecognized []byte        `json:"-"`
+}
+
+func (m *SignIdentity) Reset()                    { *m = SignIdentity{} }
+func (m *SignIdentity) String() string            { return proto.CompactTextString(m) }
+func (*SignIdentity) ProtoMessage()               {}
+func (*SignIdentity) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{55} }
+
+func (m *SignIdentity) GetIdentity() *IdentityType {
+	if m != nil {
+		return m.Identity
+	}
+	return nil
+}
+
+func (m *SignIdentity) GetChallengeHidden() []byte {
+	if m != nil {
+		return m.ChallengeHidden
+	}
+	return nil
+}
+
+func (m *SignIdentity) GetChallengeVisual() string {
+	if m != nil && m.ChallengeVisual != nil {
+		return *m.ChallengeVisual
+	}
+	return ""
+}
+
+func (m *SignIdentity) GetEcdsaCurveName() string {
+	if m != nil && m.EcdsaCurveName != nil {
+		return *m.EcdsaCurveName
+	}
+	return ""
+}
+
+// *
+// Response: Device provides signed identity
+// @prev SignIdentity
+type SignedIdentity struct {
+	Address          *string `protobuf:"bytes,1,opt,name=address" json:"address,omitempty"`
+	PublicKey        []byte  `protobuf:"bytes,2,opt,name=public_key,json=publicKey" json:"public_key,omitempty"`
+	Signature        []byte  `protobuf:"bytes,3,opt,name=signature" json:"signature,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *SignedIdentity) Reset()                    { *m = SignedIdentity{} }
+func (m *SignedIdentity) String() string            { return proto.CompactTextString(m) }
+func (*SignedIdentity) ProtoMessage()               {}
+func (*SignedIdentity) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{56} }
+
+func (m *SignedIdentity) GetAddress() string {
+	if m != nil && m.Address != nil {
+		return *m.Address
+	}
+	return ""
+}
+
+func (m *SignedIdentity) GetPublicKey() []byte {
+	if m != nil {
+		return m.PublicKey
+	}
+	return nil
+}
+
+func (m *SignedIdentity) GetSignature() []byte {
+	if m != nil {
+		return m.Signature
+	}
+	return nil
+}
+
+// *
+// Request: Ask device to generate ECDH session key
+// @next ECDHSessionKey
+// @next Failure
+type GetECDHSessionKey struct {
+	Identity         *IdentityType `protobuf:"bytes,1,opt,name=identity" json:"identity,omitempty"`
+	PeerPublicKey    []byte        `protobuf:"bytes,2,opt,name=peer_public_key,json=peerPublicKey" json:"peer_public_key,omitempty"`
+	EcdsaCurveName   *string       `protobuf:"bytes,3,opt,name=ecdsa_curve_name,json=ecdsaCurveName" json:"ecdsa_curve_name,omitempty"`
+	XXX_unrecognized []byte        `json:"-"`
+}
+
+func (m *GetECDHSessionKey) Reset()                    { *m = GetECDHSessionKey{} }
+func (m *GetECDHSessionKey) String() string            { return proto.CompactTextString(m) }
+func (*GetECDHSessionKey) ProtoMessage()               {}
+func (*GetECDHSessionKey) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{57} }
+
+func (m *GetECDHSessionKey) GetIdentity() *IdentityType {
+	if m != nil {
+		return m.Identity
+	}
+	return nil
+}
+
+func (m *GetECDHSessionKey) GetPeerPublicKey() []byte {
+	if m != nil {
+		return m.PeerPublicKey
+	}
+	return nil
+}
+
+func (m *GetECDHSessionKey) GetEcdsaCurveName() string {
+	if m != nil && m.EcdsaCurveName != nil {
+		return *m.EcdsaCurveName
+	}
+	return ""
+}
+
+// *
+// Response: Device provides ECDH session key
+// @prev GetECDHSessionKey
+type ECDHSessionKey struct {
+	SessionKey       []byte `protobuf:"bytes,1,opt,name=session_key,json=sessionKey" json:"session_key,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *ECDHSessionKey) Reset()                    { *m = ECDHSessionKey{} }
+func (m *ECDHSessionKey) String() string            { return proto.CompactTextString(m) }
+func (*ECDHSessionKey) ProtoMessage()               {}
+func (*ECDHSessionKey) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{58} }
+
+func (m *ECDHSessionKey) GetSessionKey() []byte {
+	if m != nil {
+		return m.SessionKey
+	}
+	return nil
+}
+
+// *
+// Request: Set U2F counter
+// @next Success
+type SetU2FCounter struct {
+	U2FCounter       *uint32 `protobuf:"varint,1,opt,name=u2f_counter,json=u2fCounter" json:"u2f_counter,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *SetU2FCounter) Reset()                    { *m = SetU2FCounter{} }
+func (m *SetU2FCounter) String() string            { return proto.CompactTextString(m) }
+func (*SetU2FCounter) ProtoMessage()               {}
+func (*SetU2FCounter) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{59} }
+
+func (m *SetU2FCounter) GetU2FCounter() uint32 {
+	if m != nil && m.U2FCounter != nil {
+		return *m.U2FCounter
+	}
+	return 0
+}
+
+// *
+// Request: Ask device to erase its firmware (so it can be replaced via FirmwareUpload)
+// @next Success
+// @next FirmwareRequest
+// @next Failure
+type FirmwareErase struct {
+	Length           *uint32 `protobuf:"varint,1,opt,name=length" json:"length,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *FirmwareErase) Reset()                    { *m = FirmwareErase{} }
+func (m *FirmwareErase) String() string            { return proto.CompactTextString(m) }
+func (*FirmwareErase) ProtoMessage()               {}
+func (*FirmwareErase) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{60} }
+
+func (m *FirmwareErase) GetLength() uint32 {
+	if m != nil && m.Length != nil {
+		return *m.Length
+	}
+	return 0
+}
+
+// *
+// Response: Ask for firmware chunk
+// @next FirmwareUpload
+type FirmwareRequest struct {
+	Offset           *uint32 `protobuf:"varint,1,opt,name=offset" json:"offset,omitempty"`
+	Length           *uint32 `protobuf:"varint,2,opt,name=length" json:"length,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *FirmwareRequest) Reset()                    { *m = FirmwareRequest{} }
+func (m *FirmwareRequest) String() string            { return proto.CompactTextString(m) }
+func (*FirmwareRequest) ProtoMessage()               {}
+func (*FirmwareRequest) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{61} }
+
+func (m *FirmwareRequest) GetOffset() uint32 {
+	if m != nil && m.Offset != nil {
+		return *m.Offset
+	}
+	return 0
+}
+
+func (m *FirmwareRequest) GetLength() uint32 {
+	if m != nil && m.Length != nil {
+		return *m.Length
+	}
+	return 0
+}
+
+// *
+// Request: Send firmware in binary form to the device
+// @next Success
+// @next Failure
+type FirmwareUpload struct {
+	Payload          []byte `protobuf:"bytes,1,req,name=payload" json:"payload,omitempty"`
+	Hash             []byte `protobuf:"bytes,2,opt,name=hash" json:"hash,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *FirmwareUpload) Reset()                    { *m = FirmwareUpload{} }
+func (m *FirmwareUpload) String() string            { return proto.CompactTextString(m) }
+func (*FirmwareUpload) ProtoMessage()               {}
+func (*FirmwareUpload) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{62} }
+
+func (m *FirmwareUpload) GetPayload() []byte {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func (m *FirmwareUpload) GetHash() []byte {
+	if m != nil {
+		return m.Hash
+	}
+	return nil
+}
+
+// *
+// Request: Perform a device self-test
+// @next Success
+// @next Failure
+type SelfTest struct {
+	Payload          []byte `protobuf:"bytes,1,opt,name=payload" json:"payload,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *SelfTest) Reset()                    { *m = SelfTest{} }
+func (m *SelfTest) String() string            { return proto.CompactTextString(m) }
+func (*SelfTest) ProtoMessage()               {}
+func (*SelfTest) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{63} }
+
+func (m *SelfTest) GetPayload() []byte {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+// *
+// Request: "Press" the button on the device
+// @next Success
+type DebugLinkDecision struct {
+	YesNo            *bool  `protobuf:"varint,1,req,name=yes_no,json=yesNo" json:"yes_no,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *DebugLinkDecision) Reset()                    { *m = DebugLinkDecision{} }
+func (m *DebugLinkDecision) String() string            { return proto.CompactTextString(m) }
+func (*DebugLinkDecision) ProtoMessage()               {}
+func (*DebugLinkDecision) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{64} }
+
+func (m *DebugLinkDecision) GetYesNo() bool {
+	if m != nil && m.YesNo != nil {
+		return *m.YesNo
+	}
+	return false
+}
+
+// *
+// Request: Computer asks for device state
+// @next DebugLinkState
+type DebugLinkGetState struct {
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *DebugLinkGetState) Reset()                    { *m = DebugLinkGetState{} }
+func (m *DebugLinkGetState) String() string            { return proto.CompactTextString(m) }
+func (*DebugLinkGetState) ProtoMessage()               {}
+func (*DebugLinkGetState) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{65} }
+
+// *
+// Response: Device current state
+// @prev DebugLinkGetState
+type DebugLinkState struct {
+	Layout               []byte      `protobuf:"bytes,1,opt,name=layout" json:"layout,omitempty"`
+	Pin                  *string     `protobuf:"bytes,2,opt,name=pin" json:"pin,omitempty"`
+	Matrix               *string     `protobuf:"bytes,3,opt,name=matrix" json:"matrix,omitempty"`
+	Mnemonic             *string     `protobuf:"bytes,4,opt,name=mnemonic" json:"mnemonic,omitempty"`
+	Node                 *HDNodeType `protobuf:"bytes,5,opt,name=node" json:"node,omitempty"`
+	PassphraseProtection *bool       `protobuf:"varint,6,opt,name=passphrase_protection,json=passphraseProtection" json:"passphrase_protection,omitempty"`
+	ResetWord            *string     `protobuf:"bytes,7,opt,name=reset_word,json=resetWord" json:"reset_word,omitempty"`
+	ResetEntropy         []byte      `protobuf:"bytes,8,opt,name=reset_entropy,json=resetEntropy" json:"reset_entropy,omitempty"`
+	RecoveryFakeWord     *string     `protobuf:"bytes,9,opt,name=recovery_fake_word,json=recoveryFakeWord" json:"recovery_fake_word,omitempty"`
+	RecoveryWordPos      *uint32     `protobuf:"varint,10,opt,name=recovery_word_pos,json=recoveryWordPos" json:"recovery_word_pos,omitempty"`
+	XXX_unrecognized     []byte      `json:"-"`
+}
+
+func (m *DebugLinkState) Reset()                    { *m = DebugLinkState{} }
+func (m *DebugLinkState) String() string            { return proto.CompactTextString(m) }
+func (*DebugLinkState) ProtoMessage()               {}
+func (*DebugLinkState) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{66} }
+
+func (m *DebugLinkState) GetLayout() []byte {
+	if m != nil {
+		return m.Layout
+	}
+	return nil
+}
+
+func (m *DebugLinkState) GetPin() string {
+	if m != nil && m.Pin != nil {
+		return *m.Pin
+	}
+	return ""
+}
+
+func (m *DebugLinkState) GetMatrix() string {
+	if m != nil && m.Matrix != nil {
+		return *m.Matrix
+	}
+	return ""
+}
+
+func (m *DebugLinkState) GetMnemonic() string {
+	if m != nil && m.Mnemonic != nil {
+		return *m.Mnemonic
+	}
+	return ""
+}
+
+func (m *DebugLinkState) GetNode() *HDNodeType {
+	if m != nil {
+		return m.Node
+	}
+	return nil
+}
+
+func (m *DebugLinkState) GetPassphraseProtection() bool {
+	if m != nil && m.PassphraseProtection != nil {
+		return *m.PassphraseProtection
+	}
+	return false
+}
+
+func (m *DebugLinkState) GetResetWord() string {
+	if m != nil && m.ResetWord != nil {
+		return *m.ResetWord
+	}
+	return ""
+}
+
+func (m *DebugLinkState) GetResetEntropy() []byte {
+	if m != nil {
+		return m.ResetEntropy
+	}
+	return nil
+}
+
+func (m *DebugLinkState) GetRecoveryFakeWord() string {
+	if m != nil && m.RecoveryFakeWord != nil {
+		return *m.RecoveryFakeWord
+	}
+	return ""
+}
+
+func (m *DebugLinkState) GetRecoveryWordPos() uint32 {
+	if m != nil && m.RecoveryWordPos != nil {
+		return *m.RecoveryWordPos
+	}
+	return 0
+}
+
+// *
+// Request: Ask device to restart
+type DebugLinkStop struct {
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *DebugLinkStop) Reset()                    { *m = DebugLinkStop{} }
+func (m *DebugLinkStop) String() string            { return proto.CompactTextString(m) }
+func (*DebugLinkStop) ProtoMessage()               {}
+func (*DebugLinkStop) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{67} }
+
+// *
+// Response: Device wants host to log event
+type DebugLinkLog struct {
+	Level            *uint32 `protobuf:"varint,1,opt,name=level" json:"level,omitempty"`
+	Bucket           *string `protobuf:"bytes,2,opt,name=bucket" json:"bucket,omitempty"`
+	Text             *string `protobuf:"bytes,3,opt,name=text" json:"text,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *DebugLinkLog) Reset()                    { *m = DebugLinkLog{} }
+func (m *DebugLinkLog) String() string            { return proto.CompactTextString(m) }
+func (*DebugLinkLog) ProtoMessage()               {}
+func (*DebugLinkLog) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{68} }
+
+func (m *DebugLinkLog) GetLevel() uint32 {
+	if m != nil && m.Level != nil {
+		return *m.Level
+	}
+	return 0
+}
+
+func (m *DebugLinkLog) GetBucket() string {
+	if m != nil && m.Bucket != nil {
+		return *m.Bucket
+	}
+	return ""
+}
+
+func (m *DebugLinkLog) GetText() string {
+	if m != nil && m.Text != nil {
+		return *m.Text
+	}
+	return ""
+}
+
+// *
+// Request: Read memory from device
+// @next DebugLinkMemory
+type DebugLinkMemoryRead struct {
+	Address          *uint32 `protobuf:"varint,1,opt,name=address" json:"address,omitempty"`
+	Length           *uint32 `protobuf:"varint,2,opt,name=length" json:"length,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *DebugLinkMemoryRead) Reset()                    { *m = DebugLinkMemoryRead{} }
+func (m *DebugLinkMemoryRead) String() string            { return proto.CompactTextString(m) }
+func (*DebugLinkMemoryRead) ProtoMessage()               {}
+func (*DebugLinkMemoryRead) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{69} }
+
+func (m *DebugLinkMemoryRead) GetAddress() uint32 {
+	if m != nil && m.Address != nil {
+		return *m.Address
+	}
+	return 0
+}
+
+func (m *DebugLinkMemoryRead) GetLength() uint32 {
+	if m != nil && m.Length != nil {
+		return *m.Length
+	}
+	return 0
+}
+
+// *
+// Response: Device sends memory back
+// @prev DebugLinkMemoryRead
+type DebugLinkMemory struct {
+	Memory           []byte `protobuf:"bytes,1,opt,name=memory" json:"memory,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *DebugLinkMemory) Reset()                    { *m = DebugLinkMemory{} }
+func (m *DebugLinkMemory) String() string            { return proto.CompactTextString(m) }
+func (*DebugLinkMemory) ProtoMessage()               {}
+func (*DebugLinkMemory) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{70} }
+
+func (m *DebugLinkMemory) GetMemory() []byte {
+	if m != nil {
+		return m.Memory
+	}
+	return nil
+}
+
+// *
+// Request: Write memory to device.
+// WARNING: Writing to the wrong location can irreparably break the device.
+type DebugLinkMemoryWrite struct {
+	Address          *uint32 `protobuf:"varint,1,opt,name=address" json:"address,omitempty"`
+	Memory           []byte  `protobuf:"bytes,2,opt,name=memory" json:"memory,omitempty"`
+	Flash            *bool   `protobuf:"varint,3,opt,name=flash" json:"flash,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *DebugLinkMemoryWrite) Reset()                    { *m = DebugLinkMemoryWrite{} }
+func (m *DebugLinkMemoryWrite) String() string            { return proto.CompactTextString(m) }
+func (*DebugLinkMemoryWrite) ProtoMessage()               {}
+func (*DebugLinkMemoryWrite) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{71} }
+
+func (m *DebugLinkMemoryWrite) GetAddress() uint32 {
+	if m != nil && m.Address != nil {
+		return *m.Address
+	}
+	return 0
+}
+
+func (m *DebugLinkMemoryWrite) GetMemory() []byte {
+	if m != nil {
+		return m.Memory
+	}
+	return nil
+}
+
+func (m *DebugLinkMemoryWrite) GetFlash() bool {
+	if m != nil && m.Flash != nil {
+		return *m.Flash
+	}
+	return false
+}
+
+// *
+// Request: Erase block of flash on device
+// WARNING: Writing to the wrong location can irreparably break the device.
+type DebugLinkFlashErase struct {
+	Sector           *uint32 `protobuf:"varint,1,opt,name=sector" json:"sector,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *DebugLinkFlashErase) Reset()                    { *m = DebugLinkFlashErase{} }
+func (m *DebugLinkFlashErase) String() string            { return proto.CompactTextString(m) }
+func (*DebugLinkFlashErase) ProtoMessage()               {}
+func (*DebugLinkFlashErase) Descriptor() ([]byte, []int) { return fileDescriptor1, []int{72} }
+
+func (m *DebugLinkFlashErase) GetSector() uint32 {
+	if m != nil && m.Sector != nil {
+		return *m.Sector
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterType((*Initialize)(nil), "Initialize")
+	proto.RegisterType((*GetFeatures)(nil), "GetFeatures")
+	proto.RegisterType((*Features)(nil), "Features")
+	proto.RegisterType((*ClearSession)(nil), "ClearSession")
+	proto.RegisterType((*ApplySettings)(nil), "ApplySettings")
+	proto.RegisterType((*ApplyFlags)(nil), "ApplyFlags")
+	proto.RegisterType((*ChangePin)(nil), "ChangePin")
+	proto.RegisterType((*Ping)(nil), "Ping")
+	proto.RegisterType((*Success)(nil), "Success")
+	proto.RegisterType((*Failure)(nil), "Failure")
+	proto.RegisterType((*ButtonRequest)(nil), "ButtonRequest")
+	proto.RegisterType((*ButtonAck)(nil), "ButtonAck")
+	proto.RegisterType((*PinMatrixRequest)(nil), "PinMatrixRequest")
+	proto.RegisterType((*PinMatrixAck)(nil), "PinMatrixAck")
+	proto.RegisterType((*Cancel)(nil), "Cancel")
+	proto.RegisterType((*PassphraseRequest)(nil), "PassphraseRequest")
+	proto.RegisterType((*PassphraseAck)(nil), "PassphraseAck")
+	proto.RegisterType((*GetEntropy)(nil), "GetEntropy")
+	proto.RegisterType((*Entropy)(nil), "Entropy")
+	proto.RegisterType((*GetPublicKey)(nil), "GetPublicKey")
+	proto.RegisterType((*PublicKey)(nil), "PublicKey")
+	proto.RegisterType((*GetAddress)(nil), "GetAddress")
+	proto.RegisterType((*EthereumGetAddress)(nil), "EthereumGetAddress")
+	proto.RegisterType((*Address)(nil), "Address")
+	proto.RegisterType((*EthereumAddress)(nil), "EthereumAddress")
+	proto.RegisterType((*WipeDevice)(nil), "WipeDevice")
+	proto.RegisterType((*LoadDevice)(nil), "LoadDevice")
+	proto.RegisterType((*ResetDevice)(nil), "ResetDevice")
+	proto.RegisterType((*BackupDevice)(nil), "BackupDevice")
+	proto.RegisterType((*EntropyRequest)(nil), "EntropyRequest")
+	proto.RegisterType((*EntropyAck)(nil), "EntropyAck")
+	proto.RegisterType((*RecoveryDevice)(nil), "RecoveryDevice")
+	proto.RegisterType((*WordRequest)(nil), "WordRequest")
+	proto.RegisterType((*WordAck)(nil), "WordAck")
+	proto.RegisterType((*SignMessage)(nil), "SignMessage")
+	proto.RegisterType((*VerifyMessage)(nil), "VerifyMessage")
+	proto.RegisterType((*MessageSignature)(nil), "MessageSignature")
+	proto.RegisterType((*EncryptMessage)(nil), "EncryptMessage")
+	proto.RegisterType((*EncryptedMessage)(nil), "EncryptedMessage")
+	proto.RegisterType((*DecryptMessage)(nil), "DecryptMessage")
+	proto.RegisterType((*DecryptedMessage)(nil), "DecryptedMessage")
+	proto.RegisterType((*CipherKeyValue)(nil), "CipherKeyValue")
+	proto.RegisterType((*CipheredKeyValue)(nil), "CipheredKeyValue")
+	proto.RegisterType((*EstimateTxSize)(nil), "EstimateTxSize")
+	proto.RegisterType((*TxSize)(nil), "TxSize")
+	proto.RegisterType((*SignTx)(nil), "SignTx")
+	proto.RegisterType((*SimpleSignTx)(nil), "SimpleSignTx")
+	proto.RegisterType((*TxRequest)(nil), "TxRequest")
+	proto.RegisterType((*TxAck)(nil), "TxAck")
+	proto.RegisterType((*EthereumSignTx)(nil), "EthereumSignTx")
+	proto.RegisterType((*EthereumTxRequest)(nil), "EthereumTxRequest")
+	proto.RegisterType((*EthereumTxAck)(nil), "EthereumTxAck")
+	proto.RegisterType((*EthereumSignMessage)(nil), "EthereumSignMessage")
+	proto.RegisterType((*EthereumVerifyMessage)(nil), "EthereumVerifyMessage")
+	proto.RegisterType((*EthereumMessageSignature)(nil), "EthereumMessageSignature")
+	proto.RegisterType((*SignIdentity)(nil), "SignIdentity")
+	proto.RegisterType((*SignedIdentity)(nil), "SignedIdentity")
+	proto.RegisterType((*GetECDHSessionKey)(nil), "GetECDHSessionKey")
+	proto.RegisterType((*ECDHSessionKey)(nil), "ECDHSessionKey")
+	proto.RegisterType((*SetU2FCounter)(nil), "SetU2FCounter")
+	proto.RegisterType((*FirmwareErase)(nil), "FirmwareErase")
+	proto.RegisterType((*FirmwareRequest)(nil), "FirmwareRequest")
+	proto.RegisterType((*FirmwareUpload)(nil), "FirmwareUpload")
+	proto.RegisterType((*SelfTest)(nil), "SelfTest")
+	proto.RegisterType((*DebugLinkDecision)(nil), "DebugLinkDecision")
+	proto.RegisterType((*DebugLinkGetState)(nil), "DebugLinkGetState")
+	proto.RegisterType((*DebugLinkState)(nil), "DebugLinkState")
+	proto.RegisterType((*DebugLinkStop)(nil), "DebugLinkStop")
+	proto.RegisterType((*DebugLinkLog)(nil), "DebugLinkLog")
+	proto.RegisterType((*DebugLinkMemoryRead)(nil), "DebugLinkMemoryRead")
+	proto.RegisterType((*DebugLinkMemory)(nil), "DebugLinkMemory")
+	proto.RegisterType((*DebugLinkMemoryWrite)(nil), "DebugLinkMemoryWrite")
+	proto.RegisterType((*DebugLinkFlashErase)(nil), "DebugLinkFlashErase")
+	proto.RegisterEnum("MessageType", MessageType_name, MessageType_value)
+}
+
+func init() { proto.RegisterFile("messages.proto", fileDescriptor1) }
+
+var fileDescriptor1 = []byte{
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+	0xaf, 0xb1, 0xe8, 0x5a, 0xf9, 0xae, 0xca, 0x1e, 0x49, 0xd0, 0x72, 0x79, 0xd4, 0x26, 0xd3, 0xd7,
+	0xd3, 0xa8, 0xcd, 0xf9, 0x39, 0x39, 0x81, 0xd1, 0x8a, 0xb4, 0x8b, 0x0a, 0x96, 0x91, 0xdb, 0xd2,
+	0x48, 0x2f, 0xb7, 0x71, 0xbe, 0x55, 0x8d, 0x56, 0xcb, 0xc3, 0x3b, 0x6b, 0x5f, 0xa3, 0xb5, 0xf2,
+	0xf0, 0x96, 0xea, 0x7b, 0x74, 0xbb, 0xdc, 0xbe, 0xb9, 0xa2, 0x1d, 0xdd, 0x11, 0xa0, 0x42, 0x7c,
+	0x16, 0xcb, 0x6d, 0xb4, 0x2e, 0x24, 0xba, 0x03, 0xcb, 0xb9, 0xf8, 0x2c, 0x3e, 0x65, 0xa2, 0x8d,
+	0x14, 0x78, 0xa5, 0x1c, 0x48, 0xa5, 0xbf, 0x2b, 0x39, 0xed, 0x76, 0xc1, 0x12, 0xb9, 0x56, 0x0d,
+	0xba, 0x27, 0xed, 0x30, 0x2d, 0x1f, 0xb2, 0x6c, 0xfe, 0xad, 0xa5, 0xfa, 0x77, 0x7c, 0xbe, 0x60,
+	0xd1, 0x7c, 0x07, 0x1f, 0xbd, 0x5d, 0x6e, 0x2f, 0xa9, 0x15, 0x8d, 0xfa, 0xe5, 0x99, 0x5b, 0x34,
+	0xa5, 0xd1, 0xfd, 0x72, 0x4b, 0x15, 0x9b, 0x50, 0xe8, 0x9d, 0x74, 0x27, 0x17, 0x3c, 0x2c, 0x77,
+	0x0d, 0xd1, 0xbb, 0xa9, 0x5e, 0xeb, 0x79, 0x7e, 0xc5, 0xae, 0x25, 0xda, 0x4c, 0x35, 0x2c, 0x70,
+	0xcc, 0xf7, 0x21, 0xd1, 0x7b, 0xb3, 0x38, 0x16, 0x9b, 0x87, 0xe8, 0xfd, 0x94, 0xa3, 0x5e, 0xcc,
+	0x6d, 0xd9, 0xbd, 0x08, 0x7d, 0x50, 0x1e, 0xa9, 0xf9, 0x0b, 0x08, 0xfa, 0x50, 0x68, 0x5b, 0xb0,
+	0xab, 0xf4, 0xef, 0x46, 0xe8, 0x9f, 0x05, 0xa3, 0x75, 0xb8, 0x9e, 0x53, 0xf4, 0xcc, 0x43, 0x25,
+	0xfa, 0x48, 0x20, 0x6f, 0xe5, 0x8f, 0xa1, 0xc2, 0xbb, 0x22, 0xfa, 0x17, 0xb1, 0x66, 0x71, 0x0f,
+	0xe5, 0x9a, 0x17, 0xe8, 0x41, 0x7a, 0x4c, 0x2e, 0x97, 0xa1, 0xb2, 0x9c, 0xf8, 0xaf, 0x69, 0x8a,
+	0xb9, 0x52, 0x0e, 0xa4, 0xde, 0xff, 0xb7, 0x72, 0x6e, 0x67, 0x2e, 0x49, 0xe8, 0xe3, 0x19, 0x1b,
+	0x3c, 0x8f, 0xfa, 0xa4, 0x7c, 0xcd, 0xdc, 0x75, 0x05, 0x7d, 0x2a, 0x58, 0x6d, 0xc0, 0x8d, 0x59,
+	0x7a, 0x26, 0x2e, 0xfd, 0x4c, 0x40, 0xef, 0xc1, 0xcd, 0x32, 0x68, 0x7e, 0xcf, 0x6f, 0x09, 0x70,
+	0x1f, 0xd6, 0xca, 0xc0, 0x67, 0xf6, 0xfe, 0x43, 0x21, 0xec, 0xbd, 0xbc, 0xee, 0x67, 0xee, 0x15,
+	0xc8, 0x59, 0x6a, 0x7e, 0x9f, 0x6c, 0xeb, 0x3b, 0x33, 0xc0, 0xc9, 0xc5, 0x02, 0xe1, 0xa5, 0xda,
+	0xf7, 0x25, 0x86, 0xca, 0xdf, 0x35, 0xd0, 0xd1, 0x52, 0xed, 0x87, 0x12, 0x43, 0xe5, 0xaa, 0x65,
+	0x34, 0x14, 0xac, 0x0a, 0xe1, 0x2c, 0x57, 0xd0, 0x68, 0x24, 0x18, 0x15, 0x8c, 0x59, 0x52, 0x13,
+	0x23, 0x57, 0xb0, 0x2b, 0x84, 0x61, 0x01, 0x8a, 0x3c, 0xc1, 0xf1, 0x2e, 0xac, 0x9c, 0x03, 0x63,
+	0x15, 0x2f, 0xf2, 0x05, 0xcb, 0x59, 0xab, 0x67, 0xd5, 0x2b, 0xfa, 0x9a, 0x43, 0x1f, 0xbe, 0x0f,
+	0xab, 0xb6, 0x37, 0xe9, 0x87, 0x56, 0xe4, 0x85, 0x23, 0x32, 0xb6, 0x0e, 0xc3, 0x7e, 0x14, 0xe0,
+	0x97, 0x5e, 0xd0, 0x1f, 0x93, 0x43, 0xfe, 0x6f, 0x7e, 0x87, 0xf1, 0xd1, 0xc3, 0xce, 0x01, 0x23,
+	0x0a, 0xae, 0x7f, 0x0f, 0x00, 0x00, 0xff, 0xff, 0x2a, 0xe4, 0xc0, 0x85, 0x16, 0x28, 0x00, 0x00,
+}
diff --git a/accounts/usbwallet/internal/trezor/messages.proto b/accounts/usbwallet/internal/trezor/messages.proto
new file mode 100644
index 000000000..178956457
--- /dev/null
+++ b/accounts/usbwallet/internal/trezor/messages.proto
@@ -0,0 +1,903 @@
+// This file originates from the SatoshiLabs Trezor `common` repository at:
+//   https://github.com/trezor/trezor-common/blob/master/protob/messages.proto
+// dated 28.07.2017, commit dd8ec3231fb5f7992360aff9bdfe30bb58130f4b.
+
+/**
+ * Messages for TREZOR communication
+ */
+
+// Sugar for easier handling in Java
+option java_package = "com.satoshilabs.trezor.lib.protobuf";
+option java_outer_classname = "TrezorMessage";
+
+import "types.proto";
+
+/**
+ * Mapping between Trezor wire identifier (uint) and a protobuf message
+ */
+enum MessageType {
+	MessageType_Initialize = 0 [(wire_in) = true];
+	MessageType_Ping = 1 [(wire_in) = true];
+	MessageType_Success = 2 [(wire_out) = true];
+	MessageType_Failure = 3 [(wire_out) = true];
+	MessageType_ChangePin = 4 [(wire_in) = true];
+	MessageType_WipeDevice = 5 [(wire_in) = true];
+	MessageType_FirmwareErase = 6 [(wire_in) = true, (wire_bootloader) = true];
+	MessageType_FirmwareUpload = 7 [(wire_in) = true, (wire_bootloader) = true];
+	MessageType_FirmwareRequest = 8 [(wire_out) = true, (wire_bootloader) = true];
+	MessageType_GetEntropy = 9 [(wire_in) = true];
+	MessageType_Entropy = 10 [(wire_out) = true];
+	MessageType_GetPublicKey = 11 [(wire_in) = true];
+	MessageType_PublicKey = 12 [(wire_out) = true];
+	MessageType_LoadDevice = 13 [(wire_in) = true];
+	MessageType_ResetDevice = 14 [(wire_in) = true];
+	MessageType_SignTx = 15 [(wire_in) = true];
+	MessageType_SimpleSignTx = 16 [(wire_in) = true, deprecated = true];
+	MessageType_Features = 17 [(wire_out) = true];
+	MessageType_PinMatrixRequest = 18 [(wire_out) = true];
+	MessageType_PinMatrixAck = 19 [(wire_in) = true, (wire_tiny) = true];
+	MessageType_Cancel = 20 [(wire_in) = true];
+	MessageType_TxRequest = 21 [(wire_out) = true];
+	MessageType_TxAck = 22 [(wire_in) = true];
+	MessageType_CipherKeyValue = 23 [(wire_in) = true];
+	MessageType_ClearSession = 24 [(wire_in) = true];
+	MessageType_ApplySettings = 25 [(wire_in) = true];
+	MessageType_ButtonRequest = 26 [(wire_out) = true];
+	MessageType_ButtonAck = 27 [(wire_in) = true, (wire_tiny) = true];
+	MessageType_ApplyFlags = 28 [(wire_in) = true];
+	MessageType_GetAddress = 29 [(wire_in) = true];
+	MessageType_Address = 30 [(wire_out) = true];
+	MessageType_SelfTest = 32 [(wire_in) = true, (wire_bootloader) = true];
+	MessageType_BackupDevice = 34 [(wire_in) = true];
+	MessageType_EntropyRequest = 35 [(wire_out) = true];
+	MessageType_EntropyAck = 36 [(wire_in) = true];
+	MessageType_SignMessage = 38 [(wire_in) = true];
+	MessageType_VerifyMessage = 39 [(wire_in) = true];
+	MessageType_MessageSignature = 40 [(wire_out) = true];
+	MessageType_PassphraseRequest = 41 [(wire_out) = true];
+	MessageType_PassphraseAck = 42 [(wire_in) = true, (wire_tiny) = true];
+	MessageType_EstimateTxSize = 43 [(wire_in) = true, deprecated = true];
+	MessageType_TxSize = 44 [(wire_out) = true, deprecated = true];
+	MessageType_RecoveryDevice = 45 [(wire_in) = true];
+	MessageType_WordRequest = 46 [(wire_out) = true];
+	MessageType_WordAck = 47 [(wire_in) = true];
+	MessageType_CipheredKeyValue = 48 [(wire_out) = true];
+	MessageType_EncryptMessage = 49 [(wire_in) = true, deprecated = true];
+	MessageType_EncryptedMessage = 50 [(wire_out) = true, deprecated = true];
+	MessageType_DecryptMessage = 51 [(wire_in) = true, deprecated = true];
+	MessageType_DecryptedMessage = 52 [(wire_out) = true, deprecated = true];
+	MessageType_SignIdentity = 53 [(wire_in) = true];
+	MessageType_SignedIdentity = 54 [(wire_out) = true];
+	MessageType_GetFeatures = 55 [(wire_in) = true];
+	MessageType_EthereumGetAddress = 56 [(wire_in) = true];
+	MessageType_EthereumAddress = 57 [(wire_out) = true];
+	MessageType_EthereumSignTx = 58 [(wire_in) = true];
+	MessageType_EthereumTxRequest = 59 [(wire_out) = true];
+	MessageType_EthereumTxAck = 60 [(wire_in) = true];
+	MessageType_GetECDHSessionKey = 61 [(wire_in) = true];
+	MessageType_ECDHSessionKey = 62 [(wire_out) = true];
+	MessageType_SetU2FCounter = 63 [(wire_in) = true];
+	MessageType_EthereumSignMessage = 64 [(wire_in) = true];
+	MessageType_EthereumVerifyMessage = 65 [(wire_in) = true];
+	MessageType_EthereumMessageSignature = 66 [(wire_out) = true];
+	MessageType_DebugLinkDecision = 100 [(wire_debug_in) = true, (wire_tiny) = true];
+	MessageType_DebugLinkGetState = 101 [(wire_debug_in) = true];
+	MessageType_DebugLinkState = 102 [(wire_debug_out) = true];
+	MessageType_DebugLinkStop = 103 [(wire_debug_in) = true];
+	MessageType_DebugLinkLog = 104 [(wire_debug_out) = true];
+	MessageType_DebugLinkMemoryRead = 110 [(wire_debug_in) = true];
+	MessageType_DebugLinkMemory = 111 [(wire_debug_out) = true];
+	MessageType_DebugLinkMemoryWrite = 112 [(wire_debug_in) = true];
+	MessageType_DebugLinkFlashErase = 113 [(wire_debug_in) = true];
+}
+
+////////////////////
+// Basic messages //
+////////////////////
+
+/**
+ * Request: Reset device to default state and ask for device details
+ * @next Features
+ */
+message Initialize {
+}
+
+/**
+ * Request: Ask for device details (no device reset)
+ * @next Features
+ */
+message GetFeatures {
+}
+
+/**
+ * Response: Reports various information about the device
+ * @prev Initialize
+ * @prev GetFeatures
+ */
+message Features {
+	optional string vendor = 1;			// name of the manufacturer, e.g. "bitcointrezor.com"
+	optional uint32 major_version = 2;		// major version of the device, e.g. 1
+	optional uint32 minor_version = 3;		// minor version of the device, e.g. 0
+	optional uint32 patch_version = 4;		// patch version of the device, e.g. 0
+	optional bool bootloader_mode = 5;		// is device in bootloader mode?
+	optional string device_id = 6;			// device's unique identifier
+	optional bool pin_protection = 7;		// is device protected by PIN?
+	optional bool passphrase_protection = 8;	// is node/mnemonic encrypted using passphrase?
+	optional string language = 9;			// device language
+	optional string label = 10;			// device description label
+	repeated CoinType coins = 11;			// supported coins
+	optional bool initialized = 12;			// does device contain seed?
+	optional bytes revision = 13;			// SCM revision of firmware
+	optional bytes bootloader_hash = 14;		// hash of the bootloader
+	optional bool imported = 15;			// was storage imported from an external source?
+	optional bool pin_cached = 16;			// is PIN already cached in session?
+	optional bool passphrase_cached = 17;		// is passphrase already cached in session?
+	optional bool firmware_present = 18;		// is valid firmware loaded?
+	optional bool needs_backup = 19;		// does storage need backup? (equals to Storage.needs_backup)
+	optional uint32 flags = 20;			// device flags (equals to Storage.flags)
+}
+
+/**
+ * Request: clear session (removes cached PIN, passphrase, etc).
+ * @next Success
+ */
+message ClearSession {
+}
+
+/**
+ * Request: change language and/or label of the device
+ * @next Success
+ * @next Failure
+ * @next ButtonRequest
+ * @next PinMatrixRequest
+ */
+message ApplySettings {
+	optional string language = 1;
+	optional string label = 2;
+	optional bool use_passphrase = 3;
+	optional bytes homescreen = 4;
+}
+
+/**
+ * Request: set flags of the device
+ * @next Success
+ * @next Failure
+ */
+message ApplyFlags {
+	optional uint32 flags = 1;	// bitmask, can only set bits, not unset
+}
+
+/**
+ * Request: Starts workflow for setting/changing/removing the PIN
+ * @next ButtonRequest
+ * @next PinMatrixRequest
+ */
+message ChangePin {
+	optional bool remove = 1;	// is PIN removal requested?
+}
+
+/**
+ * Request: Test if the device is alive, device sends back the message in Success response
+ * @next Success
+ */
+message Ping {
+	optional string message = 1;			// message to send back in Success message
+	optional bool button_protection = 2;		// ask for button press
+	optional bool pin_protection = 3;		// ask for PIN if set in device
+	optional bool passphrase_protection = 4;	// ask for passphrase if set in device
+}
+
+/**
+ * Response: Success of the previous request
+ */
+message Success {
+	optional string message = 1;	// human readable description of action or request-specific payload
+}
+
+/**
+ * Response: Failure of the previous request
+ */
+message Failure {
+	optional FailureType code = 1;	// computer-readable definition of the error state
+	optional string message = 2;	// human-readable message of the error state
+}
+
+/**
+ * Response: Device is waiting for HW button press.
+ * @next ButtonAck
+ * @next Cancel
+ */
+message ButtonRequest {
+	optional ButtonRequestType code = 1;
+	optional string data = 2;
+}
+
+/**
+ * Request: Computer agrees to wait for HW button press
+ * @prev ButtonRequest
+ */
+message ButtonAck {
+}
+
+/**
+ * Response: Device is asking computer to show PIN matrix and awaits PIN encoded using this matrix scheme
+ * @next PinMatrixAck
+ * @next Cancel
+ */
+message PinMatrixRequest {
+	optional PinMatrixRequestType type = 1;
+}
+
+/**
+ * Request: Computer responds with encoded PIN
+ * @prev PinMatrixRequest
+ */
+message PinMatrixAck {
+	required string pin = 1;		// matrix encoded PIN entered by user
+}
+
+/**
+ * Request: Abort last operation that required user interaction
+ * @prev ButtonRequest
+ * @prev PinMatrixRequest
+ * @prev PassphraseRequest
+ */
+message Cancel {
+}
+
+/**
+ * Response: Device awaits encryption passphrase
+ * @next PassphraseAck
+ * @next Cancel
+ */
+message PassphraseRequest {
+}
+
+/**
+ * Request: Send passphrase back
+ * @prev PassphraseRequest
+ */
+message PassphraseAck {
+	required string passphrase = 1;
+}
+
+/**
+ * Request: Request a sample of random data generated by hardware RNG. May be used for testing.
+ * @next ButtonRequest
+ * @next Entropy
+ * @next Failure
+ */
+message GetEntropy {
+	required uint32 size = 1;		// size of requested entropy
+}
+
+/**
+ * Response: Reply with random data generated by internal RNG
+ * @prev GetEntropy
+ */
+message Entropy {
+	required bytes entropy = 1;		// stream of random generated bytes
+}
+
+/**
+ * Request: Ask device for public key corresponding to address_n path
+ * @next PassphraseRequest
+ * @next PublicKey
+ * @next Failure
+ */
+message GetPublicKey {
+	repeated uint32 address_n = 1;		// BIP-32 path to derive the key from master node
+	optional string ecdsa_curve_name = 2;	// ECDSA curve name to use
+	optional bool show_display = 3;		// optionally show on display before sending the result
+	optional string coin_name = 4 [default='Bitcoin'];
+}
+
+/**
+ * Response: Contains public key derived from device private seed
+ * @prev GetPublicKey
+ */
+message PublicKey {
+	required HDNodeType node = 1;		// BIP32 public node
+	optional string xpub = 2;		// serialized form of public node
+}
+
+/**
+ * Request: Ask device for address corresponding to address_n path
+ * @next PassphraseRequest
+ * @next Address
+ * @next Failure
+ */
+message GetAddress {
+	repeated uint32 address_n = 1;						// BIP-32 path to derive the key from master node
+	optional string coin_name = 2 [default='Bitcoin'];
+	optional bool show_display = 3			;			// optionally show on display before sending the result
+	optional MultisigRedeemScriptType multisig = 4;				// filled if we are showing a multisig address
+	optional InputScriptType script_type = 5 [default=SPENDADDRESS];	// used to distinguish between various address formats (non-segwit, segwit, etc.)
+}
+
+/**
+ * Request: Ask device for Ethereum address corresponding to address_n path
+ * @next PassphraseRequest
+ * @next EthereumAddress
+ * @next Failure
+ */
+message EthereumGetAddress {
+	repeated uint32 address_n = 1;			// BIP-32 path to derive the key from master node
+	optional bool show_display = 2;			// optionally show on display before sending the result
+}
+
+/**
+ * Response: Contains address derived from device private seed
+ * @prev GetAddress
+ */
+message Address {
+	required string address = 1;		// Coin address in Base58 encoding
+}
+
+/**
+ * Response: Contains an Ethereum address derived from device private seed
+ * @prev EthereumGetAddress
+ */
+message EthereumAddress {
+	required bytes address = 1;		// Coin address as an Ethereum 160 bit hash
+}
+
+/**
+ * Request: Request device to wipe all sensitive data and settings
+ * @next ButtonRequest
+ */
+message WipeDevice {
+}
+
+/**
+ * Request: Load seed and related internal settings from the computer
+ * @next ButtonRequest
+ * @next Success
+ * @next Failure
+ */
+message LoadDevice {
+	optional string mnemonic = 1;				// seed encoded as BIP-39 mnemonic (12, 18 or 24 words)
+	optional HDNodeType node = 2;				// BIP-32 node
+	optional string pin = 3;				// set PIN protection
+	optional bool passphrase_protection = 4;		// enable master node encryption using passphrase
+	optional string language = 5 [default='english'];	// device language
+	optional string label = 6;				// device label
+	optional bool skip_checksum = 7;			// do not test mnemonic for valid BIP-39 checksum
+	optional uint32 u2f_counter = 8;			// U2F counter
+}
+
+/**
+ * Request: Ask device to do initialization involving user interaction
+ * @next EntropyRequest
+ * @next Failure
+ */
+message ResetDevice {
+	optional bool display_random = 1;			// display entropy generated by the device before asking for additional entropy
+	optional uint32 strength = 2 [default=256];		// strength of seed in bits
+	optional bool passphrase_protection = 3;		// enable master node encryption using passphrase
+	optional bool pin_protection = 4;			// enable PIN protection
+	optional string language = 5 [default='english'];	// device language
+	optional string label = 6;				// device label
+	optional uint32 u2f_counter = 7;			// U2F counter
+	optional bool skip_backup = 8;				// postpone seed backup to BackupDevice workflow
+}
+
+/**
+ * Request: Perform backup of the device seed if not backed up using ResetDevice
+ * @next ButtonRequest
+ */
+message BackupDevice {
+}
+
+/**
+ * Response: Ask for additional entropy from host computer
+ * @prev ResetDevice
+ * @next EntropyAck
+ */
+message EntropyRequest {
+}
+
+/**
+ * Request: Provide additional entropy for seed generation function
+ * @prev EntropyRequest
+ * @next ButtonRequest
+ */
+message EntropyAck {
+	optional bytes entropy = 1;				// 256 bits (32 bytes) of random data
+}
+
+/**
+ * Request: Start recovery workflow asking user for specific words of mnemonic
+ * Used to recovery device safely even on untrusted computer.
+ * @next WordRequest
+ */
+message RecoveryDevice {
+	optional uint32 word_count = 1;				// number of words in BIP-39 mnemonic
+	optional bool passphrase_protection = 2;		// enable master node encryption using passphrase
+	optional bool pin_protection = 3;			// enable PIN protection
+	optional string language = 4 [default='english'];	// device language
+	optional string label = 5;				// device label
+	optional bool enforce_wordlist = 6;			// enforce BIP-39 wordlist during the process
+	// 7 reserved for unused recovery method
+	optional uint32 type = 8;				// supported recovery type (see RecoveryType)
+	optional uint32 u2f_counter = 9;			// U2F counter
+	optional bool dry_run = 10;				// perform dry-run recovery workflow (for safe mnemonic validation)
+}
+
+/**
+ * Response: Device is waiting for user to enter word of the mnemonic
+ * Its position is shown only on device's internal display.
+ * @prev RecoveryDevice
+ * @prev WordAck
+ */
+message WordRequest {
+	optional WordRequestType type = 1;
+}
+
+/**
+ * Request: Computer replies with word from the mnemonic
+ * @prev WordRequest
+ * @next WordRequest
+ * @next Success
+ * @next Failure
+ */
+message WordAck {
+	required string word = 1;				// one word of mnemonic on asked position
+}
+
+//////////////////////////////
+// Message signing messages //
+//////////////////////////////
+
+/**
+ * Request: Ask device to sign message
+ * @next MessageSignature
+ * @next Failure
+ */
+message SignMessage {
+	repeated uint32 address_n = 1;						// BIP-32 path to derive the key from master node
+	required bytes message = 2;						// message to be signed
+	optional string coin_name = 3 [default='Bitcoin'];			// coin to use for signing
+	optional InputScriptType script_type = 4 [default=SPENDADDRESS];	// used to distinguish between various address formats (non-segwit, segwit, etc.)
+}
+
+/**
+ * Request: Ask device to verify message
+ * @next Success
+ * @next Failure
+ */
+message VerifyMessage {
+	optional string address = 1;				// address to verify
+	optional bytes signature = 2;				// signature to verify
+	optional bytes message = 3;				// message to verify
+	optional string coin_name = 4 [default='Bitcoin'];	// coin to use for verifying
+}
+
+/**
+ * Response: Signed message
+ * @prev SignMessage
+ */
+message MessageSignature {
+	optional string address = 1;				// address used to sign the message
+	optional bytes signature = 2;				// signature of the message
+}
+
+///////////////////////////
+// Encryption/decryption //
+///////////////////////////
+
+/**
+ * Request: Ask device to encrypt message
+ * @next EncryptedMessage
+ * @next Failure
+ */
+message EncryptMessage {
+	optional bytes pubkey = 1;				// public key
+	optional bytes message = 2;				// message to encrypt
+	optional bool display_only = 3;				// show just on display? (don't send back via wire)
+	repeated uint32 address_n = 4;				// BIP-32 path to derive the signing key from master node
+	optional string coin_name = 5 [default='Bitcoin'];	// coin to use for signing
+}
+
+/**
+ * Response: Encrypted message
+ * @prev EncryptMessage
+ */
+message EncryptedMessage {
+	optional bytes nonce = 1;				// nonce used during encryption
+	optional bytes message = 2;				// encrypted message
+	optional bytes hmac = 3;				// message hmac
+}
+
+/**
+ * Request: Ask device to decrypt message
+ * @next Success
+ * @next Failure
+ */
+message DecryptMessage {
+	repeated uint32 address_n = 1;				// BIP-32 path to derive the decryption key from master node
+	optional bytes nonce = 2;				// nonce used during encryption
+	optional bytes message = 3;				// message to decrypt
+	optional bytes hmac = 4;				// message hmac
+}
+
+/**
+ * Response: Decrypted message
+ * @prev DecryptedMessage
+ */
+message DecryptedMessage {
+	optional bytes message = 1;				// decrypted message
+	optional string address = 2;				// address used to sign the message (if used)
+}
+
+/**
+ * Request: Ask device to encrypt or decrypt value of given key
+ * @next CipheredKeyValue
+ * @next Failure
+ */
+message CipherKeyValue {
+	repeated uint32 address_n = 1;		// BIP-32 path to derive the key from master node
+	optional string key = 2;		// key component of key:value
+	optional bytes value = 3;		// value component of key:value
+	optional bool encrypt = 4;		// are we encrypting (True) or decrypting (False)?
+	optional bool ask_on_encrypt = 5;	// should we ask on encrypt operation?
+	optional bool ask_on_decrypt = 6;	// should we ask on decrypt operation?
+	optional bytes iv = 7;			// initialization vector (will be computed if not set)
+}
+
+/**
+ * Response: Return ciphered/deciphered value
+ * @prev CipherKeyValue
+ */
+message CipheredKeyValue {
+	optional bytes value = 1;		// ciphered/deciphered value
+}
+
+//////////////////////////////////
+// Transaction signing messages //
+//////////////////////////////////
+
+/**
+ * Request: Estimated size of the transaction
+ * This behaves exactly like SignTx, which means that it can ask using TxRequest
+ * This call is non-blocking (except possible PassphraseRequest to unlock the seed)
+ * @next TxSize
+ * @next Failure
+ */
+message EstimateTxSize {
+	required uint32 outputs_count = 1;			// number of transaction outputs
+	required uint32 inputs_count = 2;			// number of transaction inputs
+	optional string coin_name = 3 [default='Bitcoin'];	// coin to use
+}
+
+/**
+ * Response: Estimated size of the transaction
+ * @prev EstimateTxSize
+ */
+message TxSize {
+	optional uint32 tx_size = 1;				// estimated size of transaction in bytes
+}
+
+/**
+ * Request: Ask device to sign transaction
+ * @next PassphraseRequest
+ * @next PinMatrixRequest
+ * @next TxRequest
+ * @next Failure
+ */
+message SignTx {
+	required uint32 outputs_count = 1;			// number of transaction outputs
+	required uint32 inputs_count = 2;			// number of transaction inputs
+	optional string coin_name = 3 [default='Bitcoin'];	// coin to use
+	optional uint32 version = 4 [default=1];		// transaction version
+	optional uint32 lock_time = 5 [default=0];		// transaction lock_time
+}
+
+/**
+ * Request: Simplified transaction signing
+ * This method doesn't support streaming, so there are hardware limits in number of inputs and outputs.
+ * In case of success, the result is returned using TxRequest message.
+ * @next PassphraseRequest
+ * @next PinMatrixRequest
+ * @next TxRequest
+ * @next Failure
+ */
+message SimpleSignTx {
+	repeated TxInputType inputs = 1;			// transaction inputs
+	repeated TxOutputType outputs = 2;			// transaction outputs
+	repeated TransactionType transactions = 3;		// transactions whose outputs are used to build current inputs
+	optional string coin_name = 4 [default='Bitcoin'];	// coin to use
+	optional uint32 version = 5 [default=1];		// transaction version
+	optional uint32 lock_time = 6 [default=0];		// transaction lock_time
+}
+
+/**
+ * Response: Device asks for information for signing transaction or returns the last result
+ * If request_index is set, device awaits TxAck message (with fields filled in according to request_type)
+ * If signature_index is set, 'signature' contains signed input of signature_index's input
+ * @prev SignTx
+ * @prev SimpleSignTx
+ * @prev TxAck
+ */
+message TxRequest {
+	optional RequestType request_type = 1;			// what should be filled in TxAck message?
+	optional TxRequestDetailsType details = 2;		// request for tx details
+	optional TxRequestSerializedType serialized = 3;	// serialized data and request for next
+}
+
+/**
+ * Request: Reported transaction data
+ * @prev TxRequest
+ * @next TxRequest
+ */
+message TxAck {
+	optional TransactionType tx = 1;
+}
+
+/**
+ * Request: Ask device to sign transaction
+ * All fields are optional from the protocol's point of view. Each field defaults to value `0` if missing.
+ * Note: the first at most 1024 bytes of data MUST be transmitted as part of this message.
+ * @next PassphraseRequest
+ * @next PinMatrixRequest
+ * @next EthereumTxRequest
+ * @next Failure
+ */
+message EthereumSignTx {
+	repeated uint32 address_n = 1;			// BIP-32 path to derive the key from master node
+	optional bytes nonce = 2;			// <=256 bit unsigned big endian
+	optional bytes gas_price = 3;			// <=256 bit unsigned big endian (in wei)
+	optional bytes gas_limit = 4;			// <=256 bit unsigned big endian
+	optional bytes to = 5;				// 160 bit address hash
+	optional bytes value = 6;			// <=256 bit unsigned big endian (in wei)
+	optional bytes data_initial_chunk = 7;		// The initial data chunk (<= 1024 bytes)
+	optional uint32 data_length = 8;		// Length of transaction payload
+	optional uint32 chain_id = 9;			// Chain Id for EIP 155
+}
+
+/**
+ * Response: Device asks for more data from transaction payload, or returns the signature.
+ * If data_length is set, device awaits that many more bytes of payload.
+ * Otherwise, the signature_* fields contain the computed transaction signature. All three fields will be present.
+ * @prev EthereumSignTx
+ * @next EthereumTxAck
+ */
+message EthereumTxRequest {
+	optional uint32 data_length = 1;		// Number of bytes being requested (<= 1024)
+	optional uint32 signature_v = 2;		// Computed signature (recovery parameter, limited to 27 or 28)
+	optional bytes signature_r = 3;			// Computed signature R component (256 bit)
+	optional bytes signature_s = 4;			// Computed signature S component (256 bit)
+}
+
+/**
+ * Request: Transaction payload data.
+ * @prev EthereumTxRequest
+ * @next EthereumTxRequest
+ */
+message EthereumTxAck {
+	optional bytes data_chunk = 1;			// Bytes from transaction payload (<= 1024 bytes)
+}
+
+////////////////////////////////////////
+// Ethereum: Message signing messages //
+////////////////////////////////////////
+
+/**
+ * Request: Ask device to sign message
+ * @next EthereumMessageSignature
+ * @next Failure
+ */
+message EthereumSignMessage {
+	repeated uint32 address_n = 1;				// BIP-32 path to derive the key from master node
+	required bytes message = 2;				// message to be signed
+}
+
+/**
+ * Request: Ask device to verify message
+ * @next Success
+ * @next Failure
+ */
+message EthereumVerifyMessage {
+	optional bytes address = 1;				// address to verify
+	optional bytes signature = 2;				// signature to verify
+	optional bytes message = 3;				// message to verify
+}
+
+/**
+ * Response: Signed message
+ * @prev EthereumSignMessage
+ */
+message EthereumMessageSignature {
+	optional bytes address = 1;				// address used to sign the message
+	optional bytes signature = 2;				// signature of the message
+}
+
+///////////////////////
+// Identity messages //
+///////////////////////
+
+/**
+ * Request: Ask device to sign identity
+ * @next SignedIdentity
+ * @next Failure
+ */
+message SignIdentity {
+	optional IdentityType identity = 1;		// identity
+	optional bytes challenge_hidden = 2;		// non-visible challenge
+	optional string challenge_visual = 3;		// challenge shown on display (e.g. date+time)
+	optional string ecdsa_curve_name = 4;		// ECDSA curve name to use
+}
+
+/**
+ * Response: Device provides signed identity
+ * @prev SignIdentity
+ */
+message SignedIdentity {
+	optional string address = 1;			// identity address
+	optional bytes public_key = 2;			// identity public key
+	optional bytes signature = 3;			// signature of the identity data
+}
+
+///////////////////
+// ECDH messages //
+///////////////////
+
+/**
+ * Request: Ask device to generate ECDH session key
+ * @next ECDHSessionKey
+ * @next Failure
+ */
+message GetECDHSessionKey {
+	optional IdentityType identity = 1;		// identity
+	optional bytes peer_public_key = 2;		// peer's public key
+	optional string ecdsa_curve_name = 3;		// ECDSA curve name to use
+}
+
+/**
+ * Response: Device provides ECDH session key
+ * @prev GetECDHSessionKey
+ */
+message ECDHSessionKey {
+	optional bytes session_key = 1;			// ECDH session key
+}
+
+///////////////////
+// U2F messages //
+///////////////////
+
+/**
+ * Request: Set U2F counter
+ * @next Success
+ */
+message SetU2FCounter {
+	optional uint32 u2f_counter = 1;		// counter
+}
+
+/////////////////////////
+// Bootloader messages //
+/////////////////////////
+
+/**
+ * Request: Ask device to erase its firmware (so it can be replaced via FirmwareUpload)
+ * @next Success
+ * @next FirmwareRequest
+ * @next Failure
+ */
+message FirmwareErase {
+	optional uint32 length = 1;			// length of new firmware
+}
+
+/**
+ * Response: Ask for firmware chunk
+ * @next FirmwareUpload
+ */
+message FirmwareRequest {
+	optional uint32 offset = 1;			// offset of requested firmware chunk
+	optional uint32 length = 2;			// length of requested firmware chunk
+}
+
+/**
+ * Request: Send firmware in binary form to the device
+ * @next Success
+ * @next Failure
+ */
+message FirmwareUpload {
+	required bytes payload = 1;			// firmware to be loaded into device
+	optional bytes hash = 2;			// hash of the payload
+}
+
+
+/**
+ * Request: Perform a device self-test
+ * @next Success
+ * @next Failure
+ */
+message SelfTest {
+	optional bytes payload = 1;			// payload to be used in self-test
+}
+
+/////////////////////////////////////////////////////////////
+// Debug messages (only available if DebugLink is enabled) //
+/////////////////////////////////////////////////////////////
+
+/**
+ * Request: "Press" the button on the device
+ * @next Success
+ */
+message DebugLinkDecision {
+	required bool yes_no = 1;			// true for "Confirm", false for "Cancel"
+}
+
+/**
+ * Request: Computer asks for device state
+ * @next DebugLinkState
+ */
+message DebugLinkGetState {
+}
+
+/**
+ * Response: Device current state
+ * @prev DebugLinkGetState
+ */
+message DebugLinkState {
+	optional bytes layout = 1;			// raw buffer of display
+	optional string pin = 2;			// current PIN, blank if PIN is not set/enabled
+	optional string matrix = 3;			// current PIN matrix
+	optional string mnemonic = 4;			// current BIP-39 mnemonic
+	optional HDNodeType node = 5;			// current BIP-32 node
+	optional bool passphrase_protection = 6;	// is node/mnemonic encrypted using passphrase?
+	optional string reset_word = 7;			// word on device display during ResetDevice workflow
+	optional bytes reset_entropy = 8;		// current entropy during ResetDevice workflow
+	optional string recovery_fake_word = 9;		// (fake) word on display during RecoveryDevice workflow
+	optional uint32 recovery_word_pos = 10;		// index of mnemonic word the device is expecting during RecoveryDevice workflow
+}
+
+/**
+ * Request: Ask device to restart
+ */
+message DebugLinkStop {
+}
+
+/**
+ * Response: Device wants host to log event
+ */
+message DebugLinkLog {
+	optional uint32 level = 1;
+	optional string bucket = 2;
+	optional string text = 3;
+}
+
+/**
+ * Request: Read memory from device
+ * @next DebugLinkMemory
+ */
+message DebugLinkMemoryRead {
+	optional uint32 address = 1;
+	optional uint32 length = 2;
+}
+
+/**
+ * Response: Device sends memory back
+ * @prev DebugLinkMemoryRead
+ */
+message DebugLinkMemory {
+	optional bytes memory = 1;
+}
+
+/**
+ * Request: Write memory to device.
+ * WARNING: Writing to the wrong location can irreparably break the device.
+ */
+message DebugLinkMemoryWrite {
+	optional uint32 address = 1;
+	optional bytes memory = 2;
+	optional bool flash = 3;
+}
+
+/**
+ * Request: Erase block of flash on device
+ * WARNING: Writing to the wrong location can irreparably break the device.
+ */
+message DebugLinkFlashErase {
+	optional uint32 sector = 1;
+}
diff --git a/accounts/usbwallet/internal/trezor/trezor.go b/accounts/usbwallet/internal/trezor/trezor.go
new file mode 100644
index 000000000..487aeb5f8
--- /dev/null
+++ b/accounts/usbwallet/internal/trezor/trezor.go
@@ -0,0 +1,46 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// This file contains the implementation for interacting with the Trezor hardware
+// wallets. The wire protocol spec can be found on the SatoshiLabs website:
+// https://doc.satoshilabs.com/trezor-tech/api-protobuf.html
+
+//go:generate protoc --go_out=Mgoogle/protobuf/descriptor.proto=github.com/golang/protobuf/protoc-gen-go/descriptor,import_path=trezor:. types.proto messages.proto
+
+// Package trezor contains the wire protocol wrapper in Go.
+package trezor
+
+import (
+	"reflect"
+
+	"github.com/golang/protobuf/proto"
+)
+
+// Type returns the protocol buffer type number of a specific message. If the
+// message is nil, this method panics!
+func Type(msg proto.Message) uint16 {
+	return uint16(MessageType_value["MessageType_"+reflect.TypeOf(msg).Elem().Name()])
+}
+
+// Name returns the friendly message type name of a specific protocol buffer
+// type numbers.
+func Name(kind uint16) string {
+	name := MessageType_name[int32(kind)]
+	if len(name) < 12 {
+		return name
+	}
+	return name[12:]
+}
diff --git a/accounts/usbwallet/internal/trezor/types.pb.go b/accounts/usbwallet/internal/trezor/types.pb.go
new file mode 100644
index 000000000..25b7672d2
--- /dev/null
+++ b/accounts/usbwallet/internal/trezor/types.pb.go
@@ -0,0 +1,1333 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: types.proto
+
+/*
+Package trezor is a generated protocol buffer package.
+
+It is generated from these files:
+	types.proto
+	messages.proto
+
+It has these top-level messages:
+	HDNodeType
+	HDNodePathType
+	CoinType
+	MultisigRedeemScriptType
+	TxInputType
+	TxOutputType
+	TxOutputBinType
+	TransactionType
+	TxRequestDetailsType
+	TxRequestSerializedType
+	IdentityType
+	Initialize
+	GetFeatures
+	Features
+	ClearSession
+	ApplySettings
+	ApplyFlags
+	ChangePin
+	Ping
+	Success
+	Failure
+	ButtonRequest
+	ButtonAck
+	PinMatrixRequest
+	PinMatrixAck
+	Cancel
+	PassphraseRequest
+	PassphraseAck
+	GetEntropy
+	Entropy
+	GetPublicKey
+	PublicKey
+	GetAddress
+	EthereumGetAddress
+	Address
+	EthereumAddress
+	WipeDevice
+	LoadDevice
+	ResetDevice
+	BackupDevice
+	EntropyRequest
+	EntropyAck
+	RecoveryDevice
+	WordRequest
+	WordAck
+	SignMessage
+	VerifyMessage
+	MessageSignature
+	EncryptMessage
+	EncryptedMessage
+	DecryptMessage
+	DecryptedMessage
+	CipherKeyValue
+	CipheredKeyValue
+	EstimateTxSize
+	TxSize
+	SignTx
+	SimpleSignTx
+	TxRequest
+	TxAck
+	EthereumSignTx
+	EthereumTxRequest
+	EthereumTxAck
+	EthereumSignMessage
+	EthereumVerifyMessage
+	EthereumMessageSignature
+	SignIdentity
+	SignedIdentity
+	GetECDHSessionKey
+	ECDHSessionKey
+	SetU2FCounter
+	FirmwareErase
+	FirmwareRequest
+	FirmwareUpload
+	SelfTest
+	DebugLinkDecision
+	DebugLinkGetState
+	DebugLinkState
+	DebugLinkStop
+	DebugLinkLog
+	DebugLinkMemoryRead
+	DebugLinkMemory
+	DebugLinkMemoryWrite
+	DebugLinkFlashErase
+*/
+package trezor
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+import google_protobuf "github.com/golang/protobuf/protoc-gen-go/descriptor"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// *
+// Type of failures returned by Failure message
+// @used_in Failure
+type FailureType int32
+
+const (
+	FailureType_Failure_UnexpectedMessage FailureType = 1
+	FailureType_Failure_ButtonExpected    FailureType = 2
+	FailureType_Failure_DataError         FailureType = 3
+	FailureType_Failure_ActionCancelled   FailureType = 4
+	FailureType_Failure_PinExpected       FailureType = 5
+	FailureType_Failure_PinCancelled      FailureType = 6
+	FailureType_Failure_PinInvalid        FailureType = 7
+	FailureType_Failure_InvalidSignature  FailureType = 8
+	FailureType_Failure_ProcessError      FailureType = 9
+	FailureType_Failure_NotEnoughFunds    FailureType = 10
+	FailureType_Failure_NotInitialized    FailureType = 11
+	FailureType_Failure_FirmwareError     FailureType = 99
+)
+
+var FailureType_name = map[int32]string{
+	1:  "Failure_UnexpectedMessage",
+	2:  "Failure_ButtonExpected",
+	3:  "Failure_DataError",
+	4:  "Failure_ActionCancelled",
+	5:  "Failure_PinExpected",
+	6:  "Failure_PinCancelled",
+	7:  "Failure_PinInvalid",
+	8:  "Failure_InvalidSignature",
+	9:  "Failure_ProcessError",
+	10: "Failure_NotEnoughFunds",
+	11: "Failure_NotInitialized",
+	99: "Failure_FirmwareError",
+}
+var FailureType_value = map[string]int32{
+	"Failure_UnexpectedMessage": 1,
+	"Failure_ButtonExpected":    2,
+	"Failure_DataError":         3,
+	"Failure_ActionCancelled":   4,
+	"Failure_PinExpected":       5,
+	"Failure_PinCancelled":      6,
+	"Failure_PinInvalid":        7,
+	"Failure_InvalidSignature":  8,
+	"Failure_ProcessError":      9,
+	"Failure_NotEnoughFunds":    10,
+	"Failure_NotInitialized":    11,
+	"Failure_FirmwareError":     99,
+}
+
+func (x FailureType) Enum() *FailureType {
+	p := new(FailureType)
+	*p = x
+	return p
+}
+func (x FailureType) String() string {
+	return proto.EnumName(FailureType_name, int32(x))
+}
+func (x *FailureType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(FailureType_value, data, "FailureType")
+	if err != nil {
+		return err
+	}
+	*x = FailureType(value)
+	return nil
+}
+func (FailureType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+// *
+// Type of script which will be used for transaction output
+// @used_in TxOutputType
+type OutputScriptType int32
+
+const (
+	OutputScriptType_PAYTOADDRESS     OutputScriptType = 0
+	OutputScriptType_PAYTOSCRIPTHASH  OutputScriptType = 1
+	OutputScriptType_PAYTOMULTISIG    OutputScriptType = 2
+	OutputScriptType_PAYTOOPRETURN    OutputScriptType = 3
+	OutputScriptType_PAYTOWITNESS     OutputScriptType = 4
+	OutputScriptType_PAYTOP2SHWITNESS OutputScriptType = 5
+)
+
+var OutputScriptType_name = map[int32]string{
+	0: "PAYTOADDRESS",
+	1: "PAYTOSCRIPTHASH",
+	2: "PAYTOMULTISIG",
+	3: "PAYTOOPRETURN",
+	4: "PAYTOWITNESS",
+	5: "PAYTOP2SHWITNESS",
+}
+var OutputScriptType_value = map[string]int32{
+	"PAYTOADDRESS":     0,
+	"PAYTOSCRIPTHASH":  1,
+	"PAYTOMULTISIG":    2,
+	"PAYTOOPRETURN":    3,
+	"PAYTOWITNESS":     4,
+	"PAYTOP2SHWITNESS": 5,
+}
+
+func (x OutputScriptType) Enum() *OutputScriptType {
+	p := new(OutputScriptType)
+	*p = x
+	return p
+}
+func (x OutputScriptType) String() string {
+	return proto.EnumName(OutputScriptType_name, int32(x))
+}
+func (x *OutputScriptType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(OutputScriptType_value, data, "OutputScriptType")
+	if err != nil {
+		return err
+	}
+	*x = OutputScriptType(value)
+	return nil
+}
+func (OutputScriptType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+// *
+// Type of script which will be used for transaction output
+// @used_in TxInputType
+type InputScriptType int32
+
+const (
+	InputScriptType_SPENDADDRESS     InputScriptType = 0
+	InputScriptType_SPENDMULTISIG    InputScriptType = 1
+	InputScriptType_EXTERNAL         InputScriptType = 2
+	InputScriptType_SPENDWITNESS     InputScriptType = 3
+	InputScriptType_SPENDP2SHWITNESS InputScriptType = 4
+)
+
+var InputScriptType_name = map[int32]string{
+	0: "SPENDADDRESS",
+	1: "SPENDMULTISIG",
+	2: "EXTERNAL",
+	3: "SPENDWITNESS",
+	4: "SPENDP2SHWITNESS",
+}
+var InputScriptType_value = map[string]int32{
+	"SPENDADDRESS":     0,
+	"SPENDMULTISIG":    1,
+	"EXTERNAL":         2,
+	"SPENDWITNESS":     3,
+	"SPENDP2SHWITNESS": 4,
+}
+
+func (x InputScriptType) Enum() *InputScriptType {
+	p := new(InputScriptType)
+	*p = x
+	return p
+}
+func (x InputScriptType) String() string {
+	return proto.EnumName(InputScriptType_name, int32(x))
+}
+func (x *InputScriptType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(InputScriptType_value, data, "InputScriptType")
+	if err != nil {
+		return err
+	}
+	*x = InputScriptType(value)
+	return nil
+}
+func (InputScriptType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+
+// *
+// Type of information required by transaction signing process
+// @used_in TxRequest
+type RequestType int32
+
+const (
+	RequestType_TXINPUT     RequestType = 0
+	RequestType_TXOUTPUT    RequestType = 1
+	RequestType_TXMETA      RequestType = 2
+	RequestType_TXFINISHED  RequestType = 3
+	RequestType_TXEXTRADATA RequestType = 4
+)
+
+var RequestType_name = map[int32]string{
+	0: "TXINPUT",
+	1: "TXOUTPUT",
+	2: "TXMETA",
+	3: "TXFINISHED",
+	4: "TXEXTRADATA",
+}
+var RequestType_value = map[string]int32{
+	"TXINPUT":     0,
+	"TXOUTPUT":    1,
+	"TXMETA":      2,
+	"TXFINISHED":  3,
+	"TXEXTRADATA": 4,
+}
+
+func (x RequestType) Enum() *RequestType {
+	p := new(RequestType)
+	*p = x
+	return p
+}
+func (x RequestType) String() string {
+	return proto.EnumName(RequestType_name, int32(x))
+}
+func (x *RequestType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(RequestType_value, data, "RequestType")
+	if err != nil {
+		return err
+	}
+	*x = RequestType(value)
+	return nil
+}
+func (RequestType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+
+// *
+// Type of button request
+// @used_in ButtonRequest
+type ButtonRequestType int32
+
+const (
+	ButtonRequestType_ButtonRequest_Other            ButtonRequestType = 1
+	ButtonRequestType_ButtonRequest_FeeOverThreshold ButtonRequestType = 2
+	ButtonRequestType_ButtonRequest_ConfirmOutput    ButtonRequestType = 3
+	ButtonRequestType_ButtonRequest_ResetDevice      ButtonRequestType = 4
+	ButtonRequestType_ButtonRequest_ConfirmWord      ButtonRequestType = 5
+	ButtonRequestType_ButtonRequest_WipeDevice       ButtonRequestType = 6
+	ButtonRequestType_ButtonRequest_ProtectCall      ButtonRequestType = 7
+	ButtonRequestType_ButtonRequest_SignTx           ButtonRequestType = 8
+	ButtonRequestType_ButtonRequest_FirmwareCheck    ButtonRequestType = 9
+	ButtonRequestType_ButtonRequest_Address          ButtonRequestType = 10
+	ButtonRequestType_ButtonRequest_PublicKey        ButtonRequestType = 11
+)
+
+var ButtonRequestType_name = map[int32]string{
+	1:  "ButtonRequest_Other",
+	2:  "ButtonRequest_FeeOverThreshold",
+	3:  "ButtonRequest_ConfirmOutput",
+	4:  "ButtonRequest_ResetDevice",
+	5:  "ButtonRequest_ConfirmWord",
+	6:  "ButtonRequest_WipeDevice",
+	7:  "ButtonRequest_ProtectCall",
+	8:  "ButtonRequest_SignTx",
+	9:  "ButtonRequest_FirmwareCheck",
+	10: "ButtonRequest_Address",
+	11: "ButtonRequest_PublicKey",
+}
+var ButtonRequestType_value = map[string]int32{
+	"ButtonRequest_Other":            1,
+	"ButtonRequest_FeeOverThreshold": 2,
+	"ButtonRequest_ConfirmOutput":    3,
+	"ButtonRequest_ResetDevice":      4,
+	"ButtonRequest_ConfirmWord":      5,
+	"ButtonRequest_WipeDevice":       6,
+	"ButtonRequest_ProtectCall":      7,
+	"ButtonRequest_SignTx":           8,
+	"ButtonRequest_FirmwareCheck":    9,
+	"ButtonRequest_Address":          10,
+	"ButtonRequest_PublicKey":        11,
+}
+
+func (x ButtonRequestType) Enum() *ButtonRequestType {
+	p := new(ButtonRequestType)
+	*p = x
+	return p
+}
+func (x ButtonRequestType) String() string {
+	return proto.EnumName(ButtonRequestType_name, int32(x))
+}
+func (x *ButtonRequestType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(ButtonRequestType_value, data, "ButtonRequestType")
+	if err != nil {
+		return err
+	}
+	*x = ButtonRequestType(value)
+	return nil
+}
+func (ButtonRequestType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
+
+// *
+// Type of PIN request
+// @used_in PinMatrixRequest
+type PinMatrixRequestType int32
+
+const (
+	PinMatrixRequestType_PinMatrixRequestType_Current   PinMatrixRequestType = 1
+	PinMatrixRequestType_PinMatrixRequestType_NewFirst  PinMatrixRequestType = 2
+	PinMatrixRequestType_PinMatrixRequestType_NewSecond PinMatrixRequestType = 3
+)
+
+var PinMatrixRequestType_name = map[int32]string{
+	1: "PinMatrixRequestType_Current",
+	2: "PinMatrixRequestType_NewFirst",
+	3: "PinMatrixRequestType_NewSecond",
+}
+var PinMatrixRequestType_value = map[string]int32{
+	"PinMatrixRequestType_Current":   1,
+	"PinMatrixRequestType_NewFirst":  2,
+	"PinMatrixRequestType_NewSecond": 3,
+}
+
+func (x PinMatrixRequestType) Enum() *PinMatrixRequestType {
+	p := new(PinMatrixRequestType)
+	*p = x
+	return p
+}
+func (x PinMatrixRequestType) String() string {
+	return proto.EnumName(PinMatrixRequestType_name, int32(x))
+}
+func (x *PinMatrixRequestType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(PinMatrixRequestType_value, data, "PinMatrixRequestType")
+	if err != nil {
+		return err
+	}
+	*x = PinMatrixRequestType(value)
+	return nil
+}
+func (PinMatrixRequestType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
+
+// *
+// Type of recovery procedure. These should be used as bitmask, e.g.,
+// `RecoveryDeviceType_ScrambledWords | RecoveryDeviceType_Matrix`
+// listing every method supported by the host computer.
+//
+// Note that ScrambledWords must be supported by every implementation
+// for backward compatibility; there is no way to not support it.
+//
+// @used_in RecoveryDevice
+type RecoveryDeviceType int32
+
+const (
+	// use powers of two when extending this field
+	RecoveryDeviceType_RecoveryDeviceType_ScrambledWords RecoveryDeviceType = 0
+	RecoveryDeviceType_RecoveryDeviceType_Matrix         RecoveryDeviceType = 1
+)
+
+var RecoveryDeviceType_name = map[int32]string{
+	0: "RecoveryDeviceType_ScrambledWords",
+	1: "RecoveryDeviceType_Matrix",
+}
+var RecoveryDeviceType_value = map[string]int32{
+	"RecoveryDeviceType_ScrambledWords": 0,
+	"RecoveryDeviceType_Matrix":         1,
+}
+
+func (x RecoveryDeviceType) Enum() *RecoveryDeviceType {
+	p := new(RecoveryDeviceType)
+	*p = x
+	return p
+}
+func (x RecoveryDeviceType) String() string {
+	return proto.EnumName(RecoveryDeviceType_name, int32(x))
+}
+func (x *RecoveryDeviceType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(RecoveryDeviceType_value, data, "RecoveryDeviceType")
+	if err != nil {
+		return err
+	}
+	*x = RecoveryDeviceType(value)
+	return nil
+}
+func (RecoveryDeviceType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
+
+// *
+// Type of Recovery Word request
+// @used_in WordRequest
+type WordRequestType int32
+
+const (
+	WordRequestType_WordRequestType_Plain   WordRequestType = 0
+	WordRequestType_WordRequestType_Matrix9 WordRequestType = 1
+	WordRequestType_WordRequestType_Matrix6 WordRequestType = 2
+)
+
+var WordRequestType_name = map[int32]string{
+	0: "WordRequestType_Plain",
+	1: "WordRequestType_Matrix9",
+	2: "WordRequestType_Matrix6",
+}
+var WordRequestType_value = map[string]int32{
+	"WordRequestType_Plain":   0,
+	"WordRequestType_Matrix9": 1,
+	"WordRequestType_Matrix6": 2,
+}
+
+func (x WordRequestType) Enum() *WordRequestType {
+	p := new(WordRequestType)
+	*p = x
+	return p
+}
+func (x WordRequestType) String() string {
+	return proto.EnumName(WordRequestType_name, int32(x))
+}
+func (x *WordRequestType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(WordRequestType_value, data, "WordRequestType")
+	if err != nil {
+		return err
+	}
+	*x = WordRequestType(value)
+	return nil
+}
+func (WordRequestType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
+
+// *
+// Structure representing BIP32 (hierarchical deterministic) node
+// Used for imports of private key into the device and exporting public key out of device
+// @used_in PublicKey
+// @used_in LoadDevice
+// @used_in DebugLinkState
+// @used_in Storage
+type HDNodeType struct {
+	Depth            *uint32 `protobuf:"varint,1,req,name=depth" json:"depth,omitempty"`
+	Fingerprint      *uint32 `protobuf:"varint,2,req,name=fingerprint" json:"fingerprint,omitempty"`
+	ChildNum         *uint32 `protobuf:"varint,3,req,name=child_num,json=childNum" json:"child_num,omitempty"`
+	ChainCode        []byte  `protobuf:"bytes,4,req,name=chain_code,json=chainCode" json:"chain_code,omitempty"`
+	PrivateKey       []byte  `protobuf:"bytes,5,opt,name=private_key,json=privateKey" json:"private_key,omitempty"`
+	PublicKey        []byte  `protobuf:"bytes,6,opt,name=public_key,json=publicKey" json:"public_key,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *HDNodeType) Reset()                    { *m = HDNodeType{} }
+func (m *HDNodeType) String() string            { return proto.CompactTextString(m) }
+func (*HDNodeType) ProtoMessage()               {}
+func (*HDNodeType) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+func (m *HDNodeType) GetDepth() uint32 {
+	if m != nil && m.Depth != nil {
+		return *m.Depth
+	}
+	return 0
+}
+
+func (m *HDNodeType) GetFingerprint() uint32 {
+	if m != nil && m.Fingerprint != nil {
+		return *m.Fingerprint
+	}
+	return 0
+}
+
+func (m *HDNodeType) GetChildNum() uint32 {
+	if m != nil && m.ChildNum != nil {
+		return *m.ChildNum
+	}
+	return 0
+}
+
+func (m *HDNodeType) GetChainCode() []byte {
+	if m != nil {
+		return m.ChainCode
+	}
+	return nil
+}
+
+func (m *HDNodeType) GetPrivateKey() []byte {
+	if m != nil {
+		return m.PrivateKey
+	}
+	return nil
+}
+
+func (m *HDNodeType) GetPublicKey() []byte {
+	if m != nil {
+		return m.PublicKey
+	}
+	return nil
+}
+
+type HDNodePathType struct {
+	Node             *HDNodeType `protobuf:"bytes,1,req,name=node" json:"node,omitempty"`
+	AddressN         []uint32    `protobuf:"varint,2,rep,name=address_n,json=addressN" json:"address_n,omitempty"`
+	XXX_unrecognized []byte      `json:"-"`
+}
+
+func (m *HDNodePathType) Reset()                    { *m = HDNodePathType{} }
+func (m *HDNodePathType) String() string            { return proto.CompactTextString(m) }
+func (*HDNodePathType) ProtoMessage()               {}
+func (*HDNodePathType) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+func (m *HDNodePathType) GetNode() *HDNodeType {
+	if m != nil {
+		return m.Node
+	}
+	return nil
+}
+
+func (m *HDNodePathType) GetAddressN() []uint32 {
+	if m != nil {
+		return m.AddressN
+	}
+	return nil
+}
+
+// *
+// Structure representing Coin
+// @used_in Features
+type CoinType struct {
+	CoinName            *string `protobuf:"bytes,1,opt,name=coin_name,json=coinName" json:"coin_name,omitempty"`
+	CoinShortcut        *string `protobuf:"bytes,2,opt,name=coin_shortcut,json=coinShortcut" json:"coin_shortcut,omitempty"`
+	AddressType         *uint32 `protobuf:"varint,3,opt,name=address_type,json=addressType,def=0" json:"address_type,omitempty"`
+	MaxfeeKb            *uint64 `protobuf:"varint,4,opt,name=maxfee_kb,json=maxfeeKb" json:"maxfee_kb,omitempty"`
+	AddressTypeP2Sh     *uint32 `protobuf:"varint,5,opt,name=address_type_p2sh,json=addressTypeP2sh,def=5" json:"address_type_p2sh,omitempty"`
+	SignedMessageHeader *string `protobuf:"bytes,8,opt,name=signed_message_header,json=signedMessageHeader" json:"signed_message_header,omitempty"`
+	XpubMagic           *uint32 `protobuf:"varint,9,opt,name=xpub_magic,json=xpubMagic,def=76067358" json:"xpub_magic,omitempty"`
+	XprvMagic           *uint32 `protobuf:"varint,10,opt,name=xprv_magic,json=xprvMagic,def=76066276" json:"xprv_magic,omitempty"`
+	Segwit              *bool   `protobuf:"varint,11,opt,name=segwit" json:"segwit,omitempty"`
+	Forkid              *uint32 `protobuf:"varint,12,opt,name=forkid" json:"forkid,omitempty"`
+	XXX_unrecognized    []byte  `json:"-"`
+}
+
+func (m *CoinType) Reset()                    { *m = CoinType{} }
+func (m *CoinType) String() string            { return proto.CompactTextString(m) }
+func (*CoinType) ProtoMessage()               {}
+func (*CoinType) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+
+const Default_CoinType_AddressType uint32 = 0
+const Default_CoinType_AddressTypeP2Sh uint32 = 5
+const Default_CoinType_XpubMagic uint32 = 76067358
+const Default_CoinType_XprvMagic uint32 = 76066276
+
+func (m *CoinType) GetCoinName() string {
+	if m != nil && m.CoinName != nil {
+		return *m.CoinName
+	}
+	return ""
+}
+
+func (m *CoinType) GetCoinShortcut() string {
+	if m != nil && m.CoinShortcut != nil {
+		return *m.CoinShortcut
+	}
+	return ""
+}
+
+func (m *CoinType) GetAddressType() uint32 {
+	if m != nil && m.AddressType != nil {
+		return *m.AddressType
+	}
+	return Default_CoinType_AddressType
+}
+
+func (m *CoinType) GetMaxfeeKb() uint64 {
+	if m != nil && m.MaxfeeKb != nil {
+		return *m.MaxfeeKb
+	}
+	return 0
+}
+
+func (m *CoinType) GetAddressTypeP2Sh() uint32 {
+	if m != nil && m.AddressTypeP2Sh != nil {
+		return *m.AddressTypeP2Sh
+	}
+	return Default_CoinType_AddressTypeP2Sh
+}
+
+func (m *CoinType) GetSignedMessageHeader() string {
+	if m != nil && m.SignedMessageHeader != nil {
+		return *m.SignedMessageHeader
+	}
+	return ""
+}
+
+func (m *CoinType) GetXpubMagic() uint32 {
+	if m != nil && m.XpubMagic != nil {
+		return *m.XpubMagic
+	}
+	return Default_CoinType_XpubMagic
+}
+
+func (m *CoinType) GetXprvMagic() uint32 {
+	if m != nil && m.XprvMagic != nil {
+		return *m.XprvMagic
+	}
+	return Default_CoinType_XprvMagic
+}
+
+func (m *CoinType) GetSegwit() bool {
+	if m != nil && m.Segwit != nil {
+		return *m.Segwit
+	}
+	return false
+}
+
+func (m *CoinType) GetForkid() uint32 {
+	if m != nil && m.Forkid != nil {
+		return *m.Forkid
+	}
+	return 0
+}
+
+// *
+// Type of redeem script used in input
+// @used_in TxInputType
+type MultisigRedeemScriptType struct {
+	Pubkeys          []*HDNodePathType `protobuf:"bytes,1,rep,name=pubkeys" json:"pubkeys,omitempty"`
+	Signatures       [][]byte          `protobuf:"bytes,2,rep,name=signatures" json:"signatures,omitempty"`
+	M                *uint32           `protobuf:"varint,3,opt,name=m" json:"m,omitempty"`
+	XXX_unrecognized []byte            `json:"-"`
+}
+
+func (m *MultisigRedeemScriptType) Reset()                    { *m = MultisigRedeemScriptType{} }
+func (m *MultisigRedeemScriptType) String() string            { return proto.CompactTextString(m) }
+func (*MultisigRedeemScriptType) ProtoMessage()               {}
+func (*MultisigRedeemScriptType) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+
+func (m *MultisigRedeemScriptType) GetPubkeys() []*HDNodePathType {
+	if m != nil {
+		return m.Pubkeys
+	}
+	return nil
+}
+
+func (m *MultisigRedeemScriptType) GetSignatures() [][]byte {
+	if m != nil {
+		return m.Signatures
+	}
+	return nil
+}
+
+func (m *MultisigRedeemScriptType) GetM() uint32 {
+	if m != nil && m.M != nil {
+		return *m.M
+	}
+	return 0
+}
+
+// *
+// Structure representing transaction input
+// @used_in SimpleSignTx
+// @used_in TransactionType
+type TxInputType struct {
+	AddressN         []uint32                  `protobuf:"varint,1,rep,name=address_n,json=addressN" json:"address_n,omitempty"`
+	PrevHash         []byte                    `protobuf:"bytes,2,req,name=prev_hash,json=prevHash" json:"prev_hash,omitempty"`
+	PrevIndex        *uint32                   `protobuf:"varint,3,req,name=prev_index,json=prevIndex" json:"prev_index,omitempty"`
+	ScriptSig        []byte                    `protobuf:"bytes,4,opt,name=script_sig,json=scriptSig" json:"script_sig,omitempty"`
+	Sequence         *uint32                   `protobuf:"varint,5,opt,name=sequence,def=4294967295" json:"sequence,omitempty"`
+	ScriptType       *InputScriptType          `protobuf:"varint,6,opt,name=script_type,json=scriptType,enum=InputScriptType,def=0" json:"script_type,omitempty"`
+	Multisig         *MultisigRedeemScriptType `protobuf:"bytes,7,opt,name=multisig" json:"multisig,omitempty"`
+	Amount           *uint64                   `protobuf:"varint,8,opt,name=amount" json:"amount,omitempty"`
+	XXX_unrecognized []byte                    `json:"-"`
+}
+
+func (m *TxInputType) Reset()                    { *m = TxInputType{} }
+func (m *TxInputType) String() string            { return proto.CompactTextString(m) }
+func (*TxInputType) ProtoMessage()               {}
+func (*TxInputType) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
+
+const Default_TxInputType_Sequence uint32 = 4294967295
+const Default_TxInputType_ScriptType InputScriptType = InputScriptType_SPENDADDRESS
+
+func (m *TxInputType) GetAddressN() []uint32 {
+	if m != nil {
+		return m.AddressN
+	}
+	return nil
+}
+
+func (m *TxInputType) GetPrevHash() []byte {
+	if m != nil {
+		return m.PrevHash
+	}
+	return nil
+}
+
+func (m *TxInputType) GetPrevIndex() uint32 {
+	if m != nil && m.PrevIndex != nil {
+		return *m.PrevIndex
+	}
+	return 0
+}
+
+func (m *TxInputType) GetScriptSig() []byte {
+	if m != nil {
+		return m.ScriptSig
+	}
+	return nil
+}
+
+func (m *TxInputType) GetSequence() uint32 {
+	if m != nil && m.Sequence != nil {
+		return *m.Sequence
+	}
+	return Default_TxInputType_Sequence
+}
+
+func (m *TxInputType) GetScriptType() InputScriptType {
+	if m != nil && m.ScriptType != nil {
+		return *m.ScriptType
+	}
+	return Default_TxInputType_ScriptType
+}
+
+func (m *TxInputType) GetMultisig() *MultisigRedeemScriptType {
+	if m != nil {
+		return m.Multisig
+	}
+	return nil
+}
+
+func (m *TxInputType) GetAmount() uint64 {
+	if m != nil && m.Amount != nil {
+		return *m.Amount
+	}
+	return 0
+}
+
+// *
+// Structure representing transaction output
+// @used_in SimpleSignTx
+// @used_in TransactionType
+type TxOutputType struct {
+	Address          *string                   `protobuf:"bytes,1,opt,name=address" json:"address,omitempty"`
+	AddressN         []uint32                  `protobuf:"varint,2,rep,name=address_n,json=addressN" json:"address_n,omitempty"`
+	Amount           *uint64                   `protobuf:"varint,3,req,name=amount" json:"amount,omitempty"`
+	ScriptType       *OutputScriptType         `protobuf:"varint,4,req,name=script_type,json=scriptType,enum=OutputScriptType" json:"script_type,omitempty"`
+	Multisig         *MultisigRedeemScriptType `protobuf:"bytes,5,opt,name=multisig" json:"multisig,omitempty"`
+	OpReturnData     []byte                    `protobuf:"bytes,6,opt,name=op_return_data,json=opReturnData" json:"op_return_data,omitempty"`
+	XXX_unrecognized []byte                    `json:"-"`
+}
+
+func (m *TxOutputType) Reset()                    { *m = TxOutputType{} }
+func (m *TxOutputType) String() string            { return proto.CompactTextString(m) }
+func (*TxOutputType) ProtoMessage()               {}
+func (*TxOutputType) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
+
+func (m *TxOutputType) GetAddress() string {
+	if m != nil && m.Address != nil {
+		return *m.Address
+	}
+	return ""
+}
+
+func (m *TxOutputType) GetAddressN() []uint32 {
+	if m != nil {
+		return m.AddressN
+	}
+	return nil
+}
+
+func (m *TxOutputType) GetAmount() uint64 {
+	if m != nil && m.Amount != nil {
+		return *m.Amount
+	}
+	return 0
+}
+
+func (m *TxOutputType) GetScriptType() OutputScriptType {
+	if m != nil && m.ScriptType != nil {
+		return *m.ScriptType
+	}
+	return OutputScriptType_PAYTOADDRESS
+}
+
+func (m *TxOutputType) GetMultisig() *MultisigRedeemScriptType {
+	if m != nil {
+		return m.Multisig
+	}
+	return nil
+}
+
+func (m *TxOutputType) GetOpReturnData() []byte {
+	if m != nil {
+		return m.OpReturnData
+	}
+	return nil
+}
+
+// *
+// Structure representing compiled transaction output
+// @used_in TransactionType
+type TxOutputBinType struct {
+	Amount           *uint64 `protobuf:"varint,1,req,name=amount" json:"amount,omitempty"`
+	ScriptPubkey     []byte  `protobuf:"bytes,2,req,name=script_pubkey,json=scriptPubkey" json:"script_pubkey,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *TxOutputBinType) Reset()                    { *m = TxOutputBinType{} }
+func (m *TxOutputBinType) String() string            { return proto.CompactTextString(m) }
+func (*TxOutputBinType) ProtoMessage()               {}
+func (*TxOutputBinType) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
+
+func (m *TxOutputBinType) GetAmount() uint64 {
+	if m != nil && m.Amount != nil {
+		return *m.Amount
+	}
+	return 0
+}
+
+func (m *TxOutputBinType) GetScriptPubkey() []byte {
+	if m != nil {
+		return m.ScriptPubkey
+	}
+	return nil
+}
+
+// *
+// Structure representing transaction
+// @used_in SimpleSignTx
+type TransactionType struct {
+	Version          *uint32            `protobuf:"varint,1,opt,name=version" json:"version,omitempty"`
+	Inputs           []*TxInputType     `protobuf:"bytes,2,rep,name=inputs" json:"inputs,omitempty"`
+	BinOutputs       []*TxOutputBinType `protobuf:"bytes,3,rep,name=bin_outputs,json=binOutputs" json:"bin_outputs,omitempty"`
+	Outputs          []*TxOutputType    `protobuf:"bytes,5,rep,name=outputs" json:"outputs,omitempty"`
+	LockTime         *uint32            `protobuf:"varint,4,opt,name=lock_time,json=lockTime" json:"lock_time,omitempty"`
+	InputsCnt        *uint32            `protobuf:"varint,6,opt,name=inputs_cnt,json=inputsCnt" json:"inputs_cnt,omitempty"`
+	OutputsCnt       *uint32            `protobuf:"varint,7,opt,name=outputs_cnt,json=outputsCnt" json:"outputs_cnt,omitempty"`
+	ExtraData        []byte             `protobuf:"bytes,8,opt,name=extra_data,json=extraData" json:"extra_data,omitempty"`
+	ExtraDataLen     *uint32            `protobuf:"varint,9,opt,name=extra_data_len,json=extraDataLen" json:"extra_data_len,omitempty"`
+	XXX_unrecognized []byte             `json:"-"`
+}
+
+func (m *TransactionType) Reset()                    { *m = TransactionType{} }
+func (m *TransactionType) String() string            { return proto.CompactTextString(m) }
+func (*TransactionType) ProtoMessage()               {}
+func (*TransactionType) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
+
+func (m *TransactionType) GetVersion() uint32 {
+	if m != nil && m.Version != nil {
+		return *m.Version
+	}
+	return 0
+}
+
+func (m *TransactionType) GetInputs() []*TxInputType {
+	if m != nil {
+		return m.Inputs
+	}
+	return nil
+}
+
+func (m *TransactionType) GetBinOutputs() []*TxOutputBinType {
+	if m != nil {
+		return m.BinOutputs
+	}
+	return nil
+}
+
+func (m *TransactionType) GetOutputs() []*TxOutputType {
+	if m != nil {
+		return m.Outputs
+	}
+	return nil
+}
+
+func (m *TransactionType) GetLockTime() uint32 {
+	if m != nil && m.LockTime != nil {
+		return *m.LockTime
+	}
+	return 0
+}
+
+func (m *TransactionType) GetInputsCnt() uint32 {
+	if m != nil && m.InputsCnt != nil {
+		return *m.InputsCnt
+	}
+	return 0
+}
+
+func (m *TransactionType) GetOutputsCnt() uint32 {
+	if m != nil && m.OutputsCnt != nil {
+		return *m.OutputsCnt
+	}
+	return 0
+}
+
+func (m *TransactionType) GetExtraData() []byte {
+	if m != nil {
+		return m.ExtraData
+	}
+	return nil
+}
+
+func (m *TransactionType) GetExtraDataLen() uint32 {
+	if m != nil && m.ExtraDataLen != nil {
+		return *m.ExtraDataLen
+	}
+	return 0
+}
+
+// *
+// Structure representing request details
+// @used_in TxRequest
+type TxRequestDetailsType struct {
+	RequestIndex     *uint32 `protobuf:"varint,1,opt,name=request_index,json=requestIndex" json:"request_index,omitempty"`
+	TxHash           []byte  `protobuf:"bytes,2,opt,name=tx_hash,json=txHash" json:"tx_hash,omitempty"`
+	ExtraDataLen     *uint32 `protobuf:"varint,3,opt,name=extra_data_len,json=extraDataLen" json:"extra_data_len,omitempty"`
+	ExtraDataOffset  *uint32 `protobuf:"varint,4,opt,name=extra_data_offset,json=extraDataOffset" json:"extra_data_offset,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *TxRequestDetailsType) Reset()                    { *m = TxRequestDetailsType{} }
+func (m *TxRequestDetailsType) String() string            { return proto.CompactTextString(m) }
+func (*TxRequestDetailsType) ProtoMessage()               {}
+func (*TxRequestDetailsType) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
+
+func (m *TxRequestDetailsType) GetRequestIndex() uint32 {
+	if m != nil && m.RequestIndex != nil {
+		return *m.RequestIndex
+	}
+	return 0
+}
+
+func (m *TxRequestDetailsType) GetTxHash() []byte {
+	if m != nil {
+		return m.TxHash
+	}
+	return nil
+}
+
+func (m *TxRequestDetailsType) GetExtraDataLen() uint32 {
+	if m != nil && m.ExtraDataLen != nil {
+		return *m.ExtraDataLen
+	}
+	return 0
+}
+
+func (m *TxRequestDetailsType) GetExtraDataOffset() uint32 {
+	if m != nil && m.ExtraDataOffset != nil {
+		return *m.ExtraDataOffset
+	}
+	return 0
+}
+
+// *
+// Structure representing serialized data
+// @used_in TxRequest
+type TxRequestSerializedType struct {
+	SignatureIndex   *uint32 `protobuf:"varint,1,opt,name=signature_index,json=signatureIndex" json:"signature_index,omitempty"`
+	Signature        []byte  `protobuf:"bytes,2,opt,name=signature" json:"signature,omitempty"`
+	SerializedTx     []byte  `protobuf:"bytes,3,opt,name=serialized_tx,json=serializedTx" json:"serialized_tx,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *TxRequestSerializedType) Reset()                    { *m = TxRequestSerializedType{} }
+func (m *TxRequestSerializedType) String() string            { return proto.CompactTextString(m) }
+func (*TxRequestSerializedType) ProtoMessage()               {}
+func (*TxRequestSerializedType) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{9} }
+
+func (m *TxRequestSerializedType) GetSignatureIndex() uint32 {
+	if m != nil && m.SignatureIndex != nil {
+		return *m.SignatureIndex
+	}
+	return 0
+}
+
+func (m *TxRequestSerializedType) GetSignature() []byte {
+	if m != nil {
+		return m.Signature
+	}
+	return nil
+}
+
+func (m *TxRequestSerializedType) GetSerializedTx() []byte {
+	if m != nil {
+		return m.SerializedTx
+	}
+	return nil
+}
+
+// *
+// Structure representing identity data
+// @used_in IdentityType
+type IdentityType struct {
+	Proto            *string `protobuf:"bytes,1,opt,name=proto" json:"proto,omitempty"`
+	User             *string `protobuf:"bytes,2,opt,name=user" json:"user,omitempty"`
+	Host             *string `protobuf:"bytes,3,opt,name=host" json:"host,omitempty"`
+	Port             *string `protobuf:"bytes,4,opt,name=port" json:"port,omitempty"`
+	Path             *string `protobuf:"bytes,5,opt,name=path" json:"path,omitempty"`
+	Index            *uint32 `protobuf:"varint,6,opt,name=index,def=0" json:"index,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *IdentityType) Reset()                    { *m = IdentityType{} }
+func (m *IdentityType) String() string            { return proto.CompactTextString(m) }
+func (*IdentityType) ProtoMessage()               {}
+func (*IdentityType) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{10} }
+
+const Default_IdentityType_Index uint32 = 0
+
+func (m *IdentityType) GetProto() string {
+	if m != nil && m.Proto != nil {
+		return *m.Proto
+	}
+	return ""
+}
+
+func (m *IdentityType) GetUser() string {
+	if m != nil && m.User != nil {
+		return *m.User
+	}
+	return ""
+}
+
+func (m *IdentityType) GetHost() string {
+	if m != nil && m.Host != nil {
+		return *m.Host
+	}
+	return ""
+}
+
+func (m *IdentityType) GetPort() string {
+	if m != nil && m.Port != nil {
+		return *m.Port
+	}
+	return ""
+}
+
+func (m *IdentityType) GetPath() string {
+	if m != nil && m.Path != nil {
+		return *m.Path
+	}
+	return ""
+}
+
+func (m *IdentityType) GetIndex() uint32 {
+	if m != nil && m.Index != nil {
+		return *m.Index
+	}
+	return Default_IdentityType_Index
+}
+
+var E_WireIn = &proto.ExtensionDesc{
+	ExtendedType:  (*google_protobuf.EnumValueOptions)(nil),
+	ExtensionType: (*bool)(nil),
+	Field:         50002,
+	Name:          "wire_in",
+	Tag:           "varint,50002,opt,name=wire_in,json=wireIn",
+	Filename:      "types.proto",
+}
+
+var E_WireOut = &proto.ExtensionDesc{
+	ExtendedType:  (*google_protobuf.EnumValueOptions)(nil),
+	ExtensionType: (*bool)(nil),
+	Field:         50003,
+	Name:          "wire_out",
+	Tag:           "varint,50003,opt,name=wire_out,json=wireOut",
+	Filename:      "types.proto",
+}
+
+var E_WireDebugIn = &proto.ExtensionDesc{
+	ExtendedType:  (*google_protobuf.EnumValueOptions)(nil),
+	ExtensionType: (*bool)(nil),
+	Field:         50004,
+	Name:          "wire_debug_in",
+	Tag:           "varint,50004,opt,name=wire_debug_in,json=wireDebugIn",
+	Filename:      "types.proto",
+}
+
+var E_WireDebugOut = &proto.ExtensionDesc{
+	ExtendedType:  (*google_protobuf.EnumValueOptions)(nil),
+	ExtensionType: (*bool)(nil),
+	Field:         50005,
+	Name:          "wire_debug_out",
+	Tag:           "varint,50005,opt,name=wire_debug_out,json=wireDebugOut",
+	Filename:      "types.proto",
+}
+
+var E_WireTiny = &proto.ExtensionDesc{
+	ExtendedType:  (*google_protobuf.EnumValueOptions)(nil),
+	ExtensionType: (*bool)(nil),
+	Field:         50006,
+	Name:          "wire_tiny",
+	Tag:           "varint,50006,opt,name=wire_tiny,json=wireTiny",
+	Filename:      "types.proto",
+}
+
+var E_WireBootloader = &proto.ExtensionDesc{
+	ExtendedType:  (*google_protobuf.EnumValueOptions)(nil),
+	ExtensionType: (*bool)(nil),
+	Field:         50007,
+	Name:          "wire_bootloader",
+	Tag:           "varint,50007,opt,name=wire_bootloader,json=wireBootloader",
+	Filename:      "types.proto",
+}
+
+func init() {
+	proto.RegisterType((*HDNodeType)(nil), "HDNodeType")
+	proto.RegisterType((*HDNodePathType)(nil), "HDNodePathType")
+	proto.RegisterType((*CoinType)(nil), "CoinType")
+	proto.RegisterType((*MultisigRedeemScriptType)(nil), "MultisigRedeemScriptType")
+	proto.RegisterType((*TxInputType)(nil), "TxInputType")
+	proto.RegisterType((*TxOutputType)(nil), "TxOutputType")
+	proto.RegisterType((*TxOutputBinType)(nil), "TxOutputBinType")
+	proto.RegisterType((*TransactionType)(nil), "TransactionType")
+	proto.RegisterType((*TxRequestDetailsType)(nil), "TxRequestDetailsType")
+	proto.RegisterType((*TxRequestSerializedType)(nil), "TxRequestSerializedType")
+	proto.RegisterType((*IdentityType)(nil), "IdentityType")
+	proto.RegisterEnum("FailureType", FailureType_name, FailureType_value)
+	proto.RegisterEnum("OutputScriptType", OutputScriptType_name, OutputScriptType_value)
+	proto.RegisterEnum("InputScriptType", InputScriptType_name, InputScriptType_value)
+	proto.RegisterEnum("RequestType", RequestType_name, RequestType_value)
+	proto.RegisterEnum("ButtonRequestType", ButtonRequestType_name, ButtonRequestType_value)
+	proto.RegisterEnum("PinMatrixRequestType", PinMatrixRequestType_name, PinMatrixRequestType_value)
+	proto.RegisterEnum("RecoveryDeviceType", RecoveryDeviceType_name, RecoveryDeviceType_value)
+	proto.RegisterEnum("WordRequestType", WordRequestType_name, WordRequestType_value)
+	proto.RegisterExtension(E_WireIn)
+	proto.RegisterExtension(E_WireOut)
+	proto.RegisterExtension(E_WireDebugIn)
+	proto.RegisterExtension(E_WireDebugOut)
+	proto.RegisterExtension(E_WireTiny)
+	proto.RegisterExtension(E_WireBootloader)
+}
+
+func init() { proto.RegisterFile("types.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 1899 bytes of a gzipped FileDescriptorProto
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+	0x2c, 0x89, 0x05, 0x62, 0x84, 0xd6, 0x61, 0x49, 0x27, 0xb6, 0x9c, 0x3d, 0x88, 0xfa, 0xbc, 0xf9,
+	0x5d, 0x0e, 0xca, 0x07, 0x01, 0x89, 0x53, 0xae, 0xbf, 0x49, 0x9e, 0xc0, 0x43, 0x73, 0xf4, 0x4f,
+	0x28, 0x9e, 0x4e, 0x70, 0x28, 0x66, 0xaf, 0x97, 0x6d, 0xa1, 0xcf, 0xe0, 0x41, 0x46, 0xef, 0xa6,
+	0x42, 0x30, 0xda, 0x36, 0x22, 0x76, 0x0e, 0xdd, 0x87, 0xb5, 0x8c, 0x93, 0x85, 0x6f, 0x73, 0xce,
+	0xb8, 0x9d, 0x47, 0x8f, 0x60, 0x3d, 0x83, 0x77, 0xd4, 0xda, 0xed, 0x05, 0x34, 0xc4, 0x71, 0x8c,
+	0x23, 0xbb, 0x80, 0xd6, 0xe1, 0x6e, 0x46, 0xf6, 0xc8, 0x95, 0xb1, 0x25, 0xe4, 0xc0, 0xbd, 0x39,
+	0xe2, 0x4a, 0x65, 0x19, 0x3d, 0x00, 0x34, 0xc7, 0x74, 0xe8, 0x45, 0x10, 0x93, 0xc8, 0x5e, 0x41,
+	0x8f, 0xc1, 0xc9, 0x70, 0x03, 0xf6, 0xb3, 0xd6, 0xd8, 0xc5, 0x05, 0x7b, 0x9c, 0x85, 0x38, 0x49,
+	0x74, 0x7c, 0xa5, 0xf9, 0x94, 0xba, 0x4c, 0xb4, 0x29, 0x4b, 0x87, 0xa3, 0x83, 0x94, 0x46, 0x89,
+	0x0d, 0xd7, 0xb8, 0x0e, 0x25, 0xc2, 0x74, 0xd2, 0x2e, 0xa3, 0x87, 0x70, 0x3f, 0xe3, 0x0e, 0x08,
+	0x1f, 0x7f, 0x08, 0x38, 0xd6, 0x26, 0xc3, 0xcd, 0x3f, 0x5a, 0x60, 0x5f, 0xbf, 0x35, 0x91, 0x0d,
+	0x95, 0xde, 0xce, 0xaf, 0xbd, 0x63, 0xf3, 0x50, 0xd8, 0x77, 0xd0, 0x5d, 0xa8, 0x29, 0xa4, 0xbf,
+	0xe7, 0x76, 0x7a, 0xde, 0xe1, 0x4e, 0xff, 0xd0, 0xb6, 0xd0, 0x1a, 0x54, 0x15, 0x78, 0x74, 0xf2,
+	0xce, 0xeb, 0xf4, 0x3b, 0xdf, 0xd8, 0xb9, 0x19, 0x74, 0xdc, 0x73, 0xdb, 0xde, 0x89, 0xdb, 0xb5,
+	0xf3, 0x33, 0x63, 0xef, 0x3b, 0x5e, 0x57, 0x1a, 0x2b, 0xa0, 0x7b, 0x60, 0x2b, 0xa4, 0xd7, 0xea,
+	0x1f, 0x66, 0xe8, 0xd2, 0x66, 0x0c, 0xb5, 0x6b, 0xcf, 0x95, 0x54, 0x9d, 0x7f, 0xb0, 0xec, 0x3b,
+	0xd2, 0xbe, 0x42, 0x66, 0x2e, 0x2d, 0x54, 0x81, 0x62, 0xfb, 0xd4, 0x6b, 0xbb, 0xdd, 0x9d, 0x77,
+	0x76, 0x6e, 0xa6, 0x92, 0xd9, 0xcd, 0x4b, 0x6f, 0x0a, 0x99, 0xf7, 0x56, 0xd8, 0x3c, 0x81, 0xb2,
+	0xd9, 0x30, 0xe5, 0xa9, 0x0c, 0x2b, 0xde, 0x69, 0xa7, 0xdb, 0x3b, 0xf1, 0xec, 0x3b, 0xd2, 0xa2,
+	0x77, 0x7a, 0x7c, 0xe2, 0xc9, 0x93, 0x85, 0x00, 0x96, 0xbd, 0xd3, 0xa3, 0xb6, 0xb7, 0x63, 0xe7,
+	0xd0, 0x2a, 0x80, 0x77, 0x7a, 0xd0, 0xe9, 0x76, 0xfa, 0x87, 0xed, 0x7d, 0x3b, 0x8f, 0x6a, 0x50,
+	0xf6, 0x4e, 0xdb, 0xa7, 0x9e, 0xbb, 0xb3, 0xbf, 0xe3, 0xed, 0xd8, 0x85, 0xcd, 0xff, 0xe4, 0x60,
+	0x4d, 0x4f, 0xdb, 0xbc, 0xf5, 0x75, 0xb8, 0xbb, 0x00, 0xfa, 0xc7, 0x62, 0x84, 0xb9, 0x6d, 0xa1,
+	0x06, 0x7c, 0xbe, 0x48, 0x1c, 0x60, 0x7c, 0x7c, 0x81, 0xb9, 0x37, 0xe2, 0x38, 0x19, 0xb1, 0x58,
+	0xce, 0xea, 0x53, 0x78, 0xb4, 0x28, 0xb3, 0xc7, 0xe8, 0x19, 0xe1, 0x63, 0xdd, 0x35, 0x3b, 0x2f,
+	0xf7, 0x60, 0x51, 0xc0, 0xc5, 0x09, 0x16, 0xfb, 0xf8, 0x82, 0x84, 0xd8, 0x2e, 0xdc, 0xa4, 0x8d,
+	0xfe, 0x7b, 0xc6, 0xe5, 0xf4, 0x3e, 0x06, 0x67, 0x91, 0x7e, 0x4f, 0x26, 0xd8, 0x28, 0x2f, 0xdf,
+	0x54, 0xee, 0x71, 0x26, 0x70, 0x28, 0xf6, 0x82, 0x38, 0xb6, 0x57, 0xe4, 0xa8, 0x2e, 0xd2, 0x72,
+	0x8e, 0xbd, 0xa9, 0x5d, 0xbc, 0x19, 0x75, 0x36, 0x78, 0x7b, 0x23, 0x1c, 0x9e, 0xdb, 0x25, 0x39,
+	0x93, 0x8b, 0x02, 0x3b, 0xfa, 0xcd, 0xb7, 0x41, 0xae, 0xe1, 0x35, 0xa7, 0xd9, 0x37, 0xbd, 0x5d,
+	0xde, 0xfc, 0x1d, 0xdc, 0xeb, 0x11, 0x7a, 0x14, 0x08, 0x4e, 0xa6, 0xf3, 0x35, 0xae, 0xc3, 0xe3,
+	0x8f, 0xe1, 0xfe, 0x5e, 0xca, 0x39, 0xa6, 0xc2, 0xb6, 0xd0, 0x33, 0x78, 0xf2, 0x51, 0x89, 0x2e,
+	0xfe, 0x70, 0x40, 0x78, 0x22, 0xec, 0x9c, 0xec, 0xc7, 0xa7, 0x44, 0xfa, 0x38, 0x64, 0x34, 0xb2,
+	0xf3, 0x9b, 0xbf, 0x01, 0xe4, 0xe2, 0x90, 0x5d, 0x60, 0x7e, 0xa9, 0xcb, 0xa4, 0xdc, 0xff, 0x00,
+	0x9e, 0xdd, 0x44, 0xfd, 0x7e, 0xc8, 0x83, 0xf1, 0x20, 0xc6, 0x91, 0x2c, 0x76, 0x62, 0xdf, 0x91,
+	0xf5, 0xfc, 0x88, 0x98, 0x76, 0x68, 0x5b, 0x9b, 0x67, 0x50, 0x93, 0x92, 0xf3, 0x79, 0x3d, 0x84,
+	0xfb, 0xd7, 0x20, 0xbf, 0x17, 0x07, 0x84, 0xda, 0x77, 0x64, 0x9d, 0xae, 0x53, 0xda, 0xd2, 0x1b,
+	0xdb, 0xfa, 0x34, 0xb9, 0x65, 0xe7, 0xb6, 0x7f, 0x06, 0x2b, 0x1f, 0x88, 0x7a, 0x41, 0xd0, 0xb3,
+	0xa6, 0xfe, 0x2f, 0xd8, 0xcc, 0xfe, 0x0b, 0x36, 0xdb, 0x34, 0x1d, 0xff, 0x2a, 0x88, 0x53, 0x7c,
+	0x3c, 0x91, 0x77, 0x60, 0xe2, 0x7c, 0xf7, 0x87, 0xbc, 0xfe, 0x52, 0x97, 0x3a, 0x1d, 0xba, 0xfd,
+	0x73, 0x28, 0x2a, 0x6d, 0x96, 0x8a, 0xdb, 0xa8, 0xff, 0xdd, 0xa8, 0x2b, 0x97, 0xc7, 0xa9, 0xd8,
+	0xfe, 0x06, 0xaa, 0x4a, 0x3f, 0xc2, 0x83, 0x74, 0x78, 0xcb, 0x18, 0xfe, 0x61, 0x8c, 0x94, 0xa5,
+	0xe6, 0xbe, 0x54, 0xec, 0xd0, 0xed, 0x0e, 0xac, 0xce, 0x19, 0xba, 0x65, 0x38, 0xff, 0x34, 0x96,
+	0x2a, 0x33, 0x4b, 0x32, 0xa6, 0x5f, 0x42, 0x49, 0x99, 0x12, 0x84, 0x5e, 0xde, 0xc6, 0xca, 0xbf,
+	0x8c, 0x15, 0x55, 0x09, 0x8f, 0xd0, 0xcb, 0xed, 0x77, 0x50, 0x53, 0x16, 0x06, 0x8c, 0x89, 0x98,
+	0xa9, 0x3f, 0x4f, 0xb7, 0xb0, 0xf3, 0x6f, 0x63, 0x47, 0x25, 0xb2, 0x3b, 0x53, 0xdd, 0xfd, 0x0a,
+	0x9e, 0x87, 0x6c, 0xdc, 0x4c, 0x02, 0xc1, 0x92, 0x11, 0x89, 0x83, 0x41, 0xd2, 0x14, 0x1c, 0x7f,
+	0xcb, 0x78, 0x33, 0x26, 0x83, 0x99, 0xbd, 0x5d, 0xf0, 0x14, 0x28, 0xdb, 0xfb, 0xff, 0x00, 0x00,
+	0x00, 0xff, 0xff, 0x70, 0x88, 0xcd, 0x71, 0xe2, 0x0f, 0x00, 0x00,
+}
diff --git a/accounts/usbwallet/internal/trezor/types.proto b/accounts/usbwallet/internal/trezor/types.proto
new file mode 100644
index 000000000..3a358a584
--- /dev/null
+++ b/accounts/usbwallet/internal/trezor/types.proto
@@ -0,0 +1,276 @@
+// This file originates from the SatoshiLabs Trezor `common` repository at:
+//   https://github.com/trezor/trezor-common/blob/master/protob/types.proto
+// dated 28.07.2017, commit dd8ec3231fb5f7992360aff9bdfe30bb58130f4b.
+
+/**
+ * Types for TREZOR communication
+ *
+ * @author	Marek Palatinus <slush@satoshilabs.com>
+ * @version	1.2
+ */
+
+// Sugar for easier handling in Java
+option java_package = "com.satoshilabs.trezor.lib.protobuf";
+option java_outer_classname = "TrezorType";
+
+import "google/protobuf/descriptor.proto";
+
+/**
+ * Options for specifying message direction and type of wire (normal/debug)
+ */
+extend google.protobuf.EnumValueOptions {
+	optional bool wire_in = 50002;		// message can be transmitted via wire from PC to TREZOR
+	optional bool wire_out = 50003;		// message can be transmitted via wire from TREZOR to PC
+	optional bool wire_debug_in = 50004;	// message can be transmitted via debug wire from PC to TREZOR
+	optional bool wire_debug_out = 50005;	// message can be transmitted via debug wire from TREZOR to PC
+	optional bool wire_tiny = 50006;	// message is handled by TREZOR when the USB stack is in tiny mode
+	optional bool wire_bootloader = 50007;  // message is only handled by TREZOR Bootloader
+}
+
+/**
+ * Type of failures returned by Failure message
+ * @used_in Failure
+ */
+enum FailureType {
+	Failure_UnexpectedMessage = 1;
+	Failure_ButtonExpected = 2;
+	Failure_DataError = 3;
+	Failure_ActionCancelled = 4;
+	Failure_PinExpected = 5;
+	Failure_PinCancelled = 6;
+	Failure_PinInvalid = 7;
+	Failure_InvalidSignature = 8;
+	Failure_ProcessError = 9;
+	Failure_NotEnoughFunds = 10;
+	Failure_NotInitialized = 11;
+	Failure_FirmwareError = 99;
+}
+
+/**
+ * Type of script which will be used for transaction output
+ * @used_in TxOutputType
+ */
+enum OutputScriptType {
+	PAYTOADDRESS = 0;	// used for all addresses (bitcoin, p2sh, witness)
+	PAYTOSCRIPTHASH = 1;	// p2sh address (deprecated; use PAYTOADDRESS)
+	PAYTOMULTISIG = 2;	// only for change output
+	PAYTOOPRETURN = 3;	// op_return
+	PAYTOWITNESS = 4;	// only for change output
+	PAYTOP2SHWITNESS = 5;	// only for change output
+}
+
+/**
+ * Type of script which will be used for transaction output
+ * @used_in TxInputType
+ */
+enum InputScriptType {
+	SPENDADDRESS = 0;		// standard p2pkh address
+	SPENDMULTISIG = 1;		// p2sh multisig address
+	EXTERNAL = 2;			// reserved for external inputs (coinjoin)
+	SPENDWITNESS = 3;		// native segwit
+	SPENDP2SHWITNESS = 4;		// segwit over p2sh (backward compatible)
+}
+
+/**
+ * Type of information required by transaction signing process
+ * @used_in TxRequest
+ */
+enum RequestType {
+	TXINPUT = 0;
+	TXOUTPUT = 1;
+	TXMETA = 2;
+	TXFINISHED = 3;
+	TXEXTRADATA = 4;
+}
+
+/**
+ * Type of button request
+ * @used_in ButtonRequest
+ */
+enum ButtonRequestType {
+	ButtonRequest_Other = 1;
+	ButtonRequest_FeeOverThreshold = 2;
+	ButtonRequest_ConfirmOutput = 3;
+	ButtonRequest_ResetDevice = 4;
+	ButtonRequest_ConfirmWord = 5;
+	ButtonRequest_WipeDevice = 6;
+	ButtonRequest_ProtectCall = 7;
+	ButtonRequest_SignTx = 8;
+	ButtonRequest_FirmwareCheck = 9;
+	ButtonRequest_Address = 10;
+	ButtonRequest_PublicKey = 11;
+}
+
+/**
+ * Type of PIN request
+ * @used_in PinMatrixRequest
+ */
+enum PinMatrixRequestType {
+	PinMatrixRequestType_Current = 1;
+	PinMatrixRequestType_NewFirst = 2;
+	PinMatrixRequestType_NewSecond = 3;
+}
+
+/**
+ * Type of recovery procedure. These should be used as bitmask, e.g.,
+ * `RecoveryDeviceType_ScrambledWords | RecoveryDeviceType_Matrix`
+ * listing every method supported by the host computer.
+ *
+ * Note that ScrambledWords must be supported by every implementation
+ * for backward compatibility; there is no way to not support it.
+ *
+ * @used_in RecoveryDevice
+ */
+enum RecoveryDeviceType {
+	// use powers of two when extending this field
+	RecoveryDeviceType_ScrambledWords = 0;		// words in scrambled order
+	RecoveryDeviceType_Matrix = 1;				// matrix recovery type
+}
+
+/**
+ * Type of Recovery Word request
+ * @used_in WordRequest
+ */
+enum WordRequestType {
+	WordRequestType_Plain = 0;
+	WordRequestType_Matrix9 = 1;
+	WordRequestType_Matrix6 = 2;
+}
+
+/**
+ * Structure representing BIP32 (hierarchical deterministic) node
+ * Used for imports of private key into the device and exporting public key out of device
+ * @used_in PublicKey
+ * @used_in LoadDevice
+ * @used_in DebugLinkState
+ * @used_in Storage
+ */
+message HDNodeType {
+	required uint32 depth = 1;
+	required uint32 fingerprint = 2;
+	required uint32 child_num = 3;
+	required bytes chain_code = 4;
+	optional bytes private_key = 5;
+	optional bytes public_key = 6;
+}
+
+message HDNodePathType {
+	required HDNodeType node = 1;						// BIP-32 node in deserialized form
+	repeated uint32 address_n = 2;						// BIP-32 path to derive the key from node
+}
+
+/**
+ * Structure representing Coin
+ * @used_in Features
+ */
+message CoinType {
+	optional string coin_name = 1;
+	optional string coin_shortcut = 2;
+	optional uint32 address_type = 3 [default=0];
+	optional uint64 maxfee_kb = 4;
+	optional uint32 address_type_p2sh = 5 [default=5];
+	optional string signed_message_header = 8;
+	optional uint32 xpub_magic = 9 [default=76067358];	// default=0x0488b21e
+	optional uint32 xprv_magic = 10 [default=76066276];	// default=0x0488ade4
+	optional bool segwit = 11;
+	optional uint32 forkid = 12;
+}
+
+/**
+ * Type of redeem script used in input
+ * @used_in TxInputType
+ */
+message MultisigRedeemScriptType {
+	repeated HDNodePathType pubkeys = 1;					// pubkeys from multisig address (sorted lexicographically)
+	repeated bytes signatures = 2;						// existing signatures for partially signed input
+	optional uint32 m = 3;							// "m" from n, how many valid signatures is necessary for spending
+}
+
+/**
+ * Structure representing transaction input
+ * @used_in SimpleSignTx
+ * @used_in TransactionType
+ */
+message TxInputType {
+	repeated uint32 address_n = 1;						// BIP-32 path to derive the key from master node
+	required bytes prev_hash = 2;						// hash of previous transaction output to spend by this input
+	required uint32 prev_index = 3;						// index of previous output to spend
+	optional bytes script_sig = 4;						// script signature, unset for tx to sign
+	optional uint32 sequence = 5 [default=4294967295];			// sequence (default=0xffffffff)
+	optional InputScriptType script_type = 6 [default=SPENDADDRESS];	// defines template of input script
+	optional MultisigRedeemScriptType multisig = 7;				// Filled if input is going to spend multisig tx
+	optional uint64 amount = 8;						// amount of previous transaction output (for segwit only)
+}
+
+/**
+ * Structure representing transaction output
+ * @used_in SimpleSignTx
+ * @used_in TransactionType
+ */
+message TxOutputType {
+	optional string address = 1;			// target coin address in Base58 encoding
+	repeated uint32 address_n = 2;			// BIP-32 path to derive the key from master node; has higher priority than "address"
+	required uint64 amount = 3;			// amount to spend in satoshis
+	required OutputScriptType script_type = 4;	// output script type
+	optional MultisigRedeemScriptType multisig = 5; // defines multisig address; script_type must be PAYTOMULTISIG
+	optional bytes op_return_data = 6;		// defines op_return data; script_type must be PAYTOOPRETURN, amount must be 0
+}
+
+/**
+ * Structure representing compiled transaction output
+ * @used_in TransactionType
+ */
+message TxOutputBinType {
+	required uint64 amount = 1;
+	required bytes script_pubkey = 2;
+}
+
+/**
+ * Structure representing transaction
+ * @used_in SimpleSignTx
+ */
+message TransactionType {
+	optional uint32 version = 1;
+	repeated TxInputType inputs = 2;
+	repeated TxOutputBinType bin_outputs = 3;
+	repeated TxOutputType outputs = 5;
+	optional uint32 lock_time = 4;
+	optional uint32 inputs_cnt = 6;
+	optional uint32 outputs_cnt = 7;
+	optional bytes extra_data = 8;
+	optional uint32 extra_data_len = 9;
+}
+
+/**
+ * Structure representing request details
+ * @used_in TxRequest
+ */
+message TxRequestDetailsType {
+	optional uint32 request_index = 1;	// device expects TxAck message from the computer
+	optional bytes tx_hash = 2;		// tx_hash of requested transaction
+	optional uint32 extra_data_len = 3;	// length of requested extra data
+	optional uint32 extra_data_offset = 4;	// offset of requested extra data
+}
+
+/**
+ * Structure representing serialized data
+ * @used_in TxRequest
+ */
+message TxRequestSerializedType {
+	optional uint32 signature_index = 1;	// 'signature' field contains signed input of this index
+	optional bytes signature = 2;		// signature of the signature_index input
+	optional bytes serialized_tx = 3;	// part of serialized and signed transaction
+}
+
+/**
+ * Structure representing identity data
+ * @used_in IdentityType
+ */
+message IdentityType {
+	optional string proto = 1;			// proto part of URI
+	optional string user = 2;			// user part of URI
+	optional string host = 3;			// host part of URI
+	optional string port = 4;			// port part of URI
+	optional string path = 5;			// path part of URI
+	optional uint32 index = 6 [default=0];		// identity index
+}
diff --git a/accounts/usbwallet/ledger.go b/accounts/usbwallet/ledger.go
new file mode 100644
index 000000000..f5def61d2
--- /dev/null
+++ b/accounts/usbwallet/ledger.go
@@ -0,0 +1,464 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// This file contains the implementation for interacting with the Ledger hardware
+// wallets. The wire protocol spec can be found in the Ledger Blue GitHub repo:
+// https://raw.githubusercontent.com/LedgerHQ/blue-app-eth/master/doc/ethapp.asc
+
+package usbwallet
+
+import (
+	"encoding/binary"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"io"
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/accounts"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/rlp"
+)
+
+// ledgerOpcode is an enumeration encoding the supported Ledger opcodes.
+type ledgerOpcode byte
+
+// ledgerParam1 is an enumeration encoding the supported Ledger parameters for
+// specific opcodes. The same parameter values may be reused between opcodes.
+type ledgerParam1 byte
+
+// ledgerParam2 is an enumeration encoding the supported Ledger parameters for
+// specific opcodes. The same parameter values may be reused between opcodes.
+type ledgerParam2 byte
+
+const (
+	ledgerOpRetrieveAddress  ledgerOpcode = 0x02 // Returns the public key and Ethereum address for a given BIP 32 path
+	ledgerOpSignTransaction  ledgerOpcode = 0x04 // Signs an Ethereum transaction after having the user validate the parameters
+	ledgerOpGetConfiguration ledgerOpcode = 0x06 // Returns specific wallet application configuration
+
+	ledgerP1DirectlyFetchAddress    ledgerParam1 = 0x00 // Return address directly from the wallet
+	ledgerP1ConfirmFetchAddress     ledgerParam1 = 0x01 // Require a user confirmation before returning the address
+	ledgerP1InitTransactionData     ledgerParam1 = 0x00 // First transaction data block for signing
+	ledgerP1ContTransactionData     ledgerParam1 = 0x80 // Subsequent transaction data block for signing
+	ledgerP2DiscardAddressChainCode ledgerParam2 = 0x00 // Do not return the chain code along with the address
+	ledgerP2ReturnAddressChainCode  ledgerParam2 = 0x01 // Require a user confirmation before returning the address
+)
+
+// errLedgerReplyInvalidHeader is the error message returned by a Ledger data exchange
+// if the device replies with a mismatching header. This usually means the device
+// is in browser mode.
+var errLedgerReplyInvalidHeader = errors.New("ledger: invalid reply header")
+
+// errLedgerInvalidVersionReply is the error message returned by a Ledger version retrieval
+// when a response does arrive, but it does not contain the expected data.
+var errLedgerInvalidVersionReply = errors.New("ledger: invalid version reply")
+
+// ledgerDriver implements the communication with a Ledger hardware wallet.
+type ledgerDriver struct {
+	device  io.ReadWriter // USB device connection to communicate through
+	version [3]byte       // Current version of the Ledger firmware (zero if app is offline)
+	browser bool          // Flag whether the Ledger is in browser mode (reply channel mismatch)
+	failure error         // Any failure that would make the device unusable
+	log     log.Logger    // Contextual logger to tag the ledger with its id
+}
+
+// newLedgerDriver creates a new instance of a Ledger USB protocol driver.
+func newLedgerDriver(logger log.Logger) driver {
+	return &ledgerDriver{
+		log: logger,
+	}
+}
+
+// Status implements usbwallet.driver, returning various states the Ledger can
+// currently be in.
+func (w *ledgerDriver) Status() (string, error) {
+	if w.failure != nil {
+		return fmt.Sprintf("Failed: %v", w.failure), w.failure
+	}
+	if w.browser {
+		return "Ethereum app in browser mode", w.failure
+	}
+	if w.offline() {
+		return "Ethereum app offline", w.failure
+	}
+	return fmt.Sprintf("Ethereum app v%d.%d.%d online", w.version[0], w.version[1], w.version[2]), w.failure
+}
+
+// offline returns whether the wallet and the Ethereum app is offline or not.
+//
+// The method assumes that the state lock is held!
+func (w *ledgerDriver) offline() bool {
+	return w.version == [3]byte{0, 0, 0}
+}
+
+// Open implements usbwallet.driver, attempting to initialize the connection to the
+// Ledger hardware wallet. The Ledger does not require a user passphrase, so that
+// parameter is silently discarded.
+func (w *ledgerDriver) Open(device io.ReadWriter, passphrase string) error {
+	w.device, w.failure = device, nil
+
+	_, err := w.ledgerDerive(accounts.DefaultBaseDerivationPath)
+	if err != nil {
+		// Ethereum app is not running or in browser mode, nothing more to do, return
+		if err == errLedgerReplyInvalidHeader {
+			w.browser = true
+		}
+		return nil
+	}
+	// Try to resolve the Ethereum app's version, will fail prior to v1.0.2
+	if w.version, err = w.ledgerVersion(); err != nil {
+		w.version = [3]byte{1, 0, 0} // Assume worst case, can't verify if v1.0.0 or v1.0.1
+	}
+	return nil
+}
+
+// Close implements usbwallet.driver, cleaning up and metadata maintained within
+// the Ledger driver.
+func (w *ledgerDriver) Close() error {
+	w.browser, w.version = false, [3]byte{}
+	return nil
+}
+
+// Heartbeat implements usbwallet.driver, performing a sanity check against the
+// Ledger to see if it's still online.
+func (w *ledgerDriver) Heartbeat() error {
+	if _, err := w.ledgerVersion(); err != nil && err != errLedgerInvalidVersionReply {
+		w.failure = err
+		return err
+	}
+	return nil
+}
+
+// Derive implements usbwallet.driver, sending a derivation request to the Ledger
+// and returning the Ethereum address located on that derivation path.
+func (w *ledgerDriver) Derive(path accounts.DerivationPath) (common.Address, error) {
+	return w.ledgerDerive(path)
+}
+
+// SignTx implements usbwallet.driver, sending the transaction to the Ledger and
+// waiting for the user to confirm or deny the transaction.
+//
+// Note, if the version of the Ethereum application running on the Ledger wallet is
+// too old to sign EIP-155 transactions, but such is requested nonetheless, an error
+// will be returned opposed to silently signing in Homestead mode.
+func (w *ledgerDriver) SignTx(path accounts.DerivationPath, tx *types.Transaction, chainID *big.Int) (common.Address, *types.Transaction, error) {
+	// If the Ethereum app doesn't run, abort
+	if w.offline() {
+		return common.Address{}, nil, accounts.ErrWalletClosed
+	}
+	// Ensure the wallet is capable of signing the given transaction
+	if chainID != nil && w.version[0] <= 1 && w.version[1] <= 0 && w.version[2] <= 2 {
+		return common.Address{}, nil, fmt.Errorf("Ledger v%d.%d.%d doesn't support signing this transaction, please update to v1.0.3 at least", w.version[0], w.version[1], w.version[2])
+	}
+	// All infos gathered and metadata checks out, request signing
+	return w.ledgerSign(path, tx, chainID)
+}
+
+// ledgerVersion retrieves the current version of the Ethereum wallet app running
+// on the Ledger wallet.
+//
+// The version retrieval protocol is defined as follows:
+//
+//   CLA | INS | P1 | P2 | Lc | Le
+//   ----+-----+----+----+----+---
+//    E0 | 06  | 00 | 00 | 00 | 04
+//
+// With no input data, and the output data being:
+//
+//   Description                                        | Length
+//   ---------------------------------------------------+--------
+//   Flags 01: arbitrary data signature enabled by user | 1 byte
+//   Application major version                          | 1 byte
+//   Application minor version                          | 1 byte
+//   Application patch version                          | 1 byte
+func (w *ledgerDriver) ledgerVersion() ([3]byte, error) {
+	// Send the request and wait for the response
+	reply, err := w.ledgerExchange(ledgerOpGetConfiguration, 0, 0, nil)
+	if err != nil {
+		return [3]byte{}, err
+	}
+	if len(reply) != 4 {
+		return [3]byte{}, errLedgerInvalidVersionReply
+	}
+	// Cache the version for future reference
+	var version [3]byte
+	copy(version[:], reply[1:])
+	return version, nil
+}
+
+// ledgerDerive retrieves the currently active Ethereum address from a Ledger
+// wallet at the specified derivation path.
+//
+// The address derivation protocol is defined as follows:
+//
+//   CLA | INS | P1 | P2 | Lc  | Le
+//   ----+-----+----+----+-----+---
+//    E0 | 02  | 00 return address
+//               01 display address and confirm before returning
+//                  | 00: do not return the chain code
+//                  | 01: return the chain code
+//                       | var | 00
+//
+// Where the input data is:
+//
+//   Description                                      | Length
+//   -------------------------------------------------+--------
+//   Number of BIP 32 derivations to perform (max 10) | 1 byte
+//   First derivation index (big endian)              | 4 bytes
+//   ...                                              | 4 bytes
+//   Last derivation index (big endian)               | 4 bytes
+//
+// And the output data is:
+//
+//   Description             | Length
+//   ------------------------+-------------------
+//   Public Key length       | 1 byte
+//   Uncompressed Public Key | arbitrary
+//   Ethereum address length | 1 byte
+//   Ethereum address        | 40 bytes hex ascii
+//   Chain code if requested | 32 bytes
+func (w *ledgerDriver) ledgerDerive(derivationPath []uint32) (common.Address, error) {
+	// Flatten the derivation path into the Ledger request
+	path := make([]byte, 1+4*len(derivationPath))
+	path[0] = byte(len(derivationPath))
+	for i, component := range derivationPath {
+		binary.BigEndian.PutUint32(path[1+4*i:], component)
+	}
+	// Send the request and wait for the response
+	reply, err := w.ledgerExchange(ledgerOpRetrieveAddress, ledgerP1DirectlyFetchAddress, ledgerP2DiscardAddressChainCode, path)
+	if err != nil {
+		return common.Address{}, err
+	}
+	// Discard the public key, we don't need that for now
+	if len(reply) < 1 || len(reply) < 1+int(reply[0]) {
+		return common.Address{}, errors.New("reply lacks public key entry")
+	}
+	reply = reply[1+int(reply[0]):]
+
+	// Extract the Ethereum hex address string
+	if len(reply) < 1 || len(reply) < 1+int(reply[0]) {
+		return common.Address{}, errors.New("reply lacks address entry")
+	}
+	hexstr := reply[1 : 1+int(reply[0])]
+
+	// Decode the hex sting into an Ethereum address and return
+	var address common.Address
+	hex.Decode(address[:], hexstr)
+	return address, nil
+}
+
+// ledgerSign sends the transaction to the Ledger wallet, and waits for the user
+// to confirm or deny the transaction.
+//
+// The transaction signing protocol is defined as follows:
+//
+//   CLA | INS | P1 | P2 | Lc  | Le
+//   ----+-----+----+----+-----+---
+//    E0 | 04  | 00: first transaction data block
+//               80: subsequent transaction data block
+//                  | 00 | variable | variable
+//
+// Where the input for the first transaction block (first 255 bytes) is:
+//
+//   Description                                      | Length
+//   -------------------------------------------------+----------
+//   Number of BIP 32 derivations to perform (max 10) | 1 byte
+//   First derivation index (big endian)              | 4 bytes
+//   ...                                              | 4 bytes
+//   Last derivation index (big endian)               | 4 bytes
+//   RLP transaction chunk                            | arbitrary
+//
+// And the input for subsequent transaction blocks (first 255 bytes) are:
+//
+//   Description           | Length
+//   ----------------------+----------
+//   RLP transaction chunk | arbitrary
+//
+// And the output data is:
+//
+//   Description | Length
+//   ------------+---------
+//   signature V | 1 byte
+//   signature R | 32 bytes
+//   signature S | 32 bytes
+func (w *ledgerDriver) ledgerSign(derivationPath []uint32, tx *types.Transaction, chainID *big.Int) (common.Address, *types.Transaction, error) {
+	// Flatten the derivation path into the Ledger request
+	path := make([]byte, 1+4*len(derivationPath))
+	path[0] = byte(len(derivationPath))
+	for i, component := range derivationPath {
+		binary.BigEndian.PutUint32(path[1+4*i:], component)
+	}
+	// Create the transaction RLP based on whether legacy or EIP155 signing was requeste
+	var (
+		txrlp []byte
+		err   error
+	)
+	if chainID == nil {
+		if txrlp, err = rlp.EncodeToBytes([]interface{}{tx.Nonce(), tx.GasPrice(), tx.Gas(), tx.To(), tx.Value(), tx.Data()}); err != nil {
+			return common.Address{}, nil, err
+		}
+	} else {
+		if txrlp, err = rlp.EncodeToBytes([]interface{}{tx.Nonce(), tx.GasPrice(), tx.Gas(), tx.To(), tx.Value(), tx.Data(), chainID, big.NewInt(0), big.NewInt(0)}); err != nil {
+			return common.Address{}, nil, err
+		}
+	}
+	payload := append(path, txrlp...)
+
+	// Send the request and wait for the response
+	var (
+		op    = ledgerP1InitTransactionData
+		reply []byte
+	)
+	for len(payload) > 0 {
+		// Calculate the size of the next data chunk
+		chunk := 255
+		if chunk > len(payload) {
+			chunk = len(payload)
+		}
+		// Send the chunk over, ensuring it's processed correctly
+		reply, err = w.ledgerExchange(ledgerOpSignTransaction, op, 0, payload[:chunk])
+		if err != nil {
+			return common.Address{}, nil, err
+		}
+		// Shift the payload and ensure subsequent chunks are marked as such
+		payload = payload[chunk:]
+		op = ledgerP1ContTransactionData
+	}
+	// Extract the Ethereum signature and do a sanity validation
+	if len(reply) != 65 {
+		return common.Address{}, nil, errors.New("reply lacks signature")
+	}
+	signature := append(reply[1:], reply[0])
+
+	// Create the correct signer and signature transform based on the chain ID
+	var signer types.Signer
+	if chainID == nil {
+		signer = new(types.HomesteadSigner)
+	} else {
+		signer = types.NewEIP155Signer(chainID)
+		signature[64] = signature[64] - byte(chainID.Uint64()*2+35)
+	}
+	signed, err := tx.WithSignature(signer, signature)
+	if err != nil {
+		return common.Address{}, nil, err
+	}
+	sender, err := types.Sender(signer, signed)
+	if err != nil {
+		return common.Address{}, nil, err
+	}
+	return sender, signed, nil
+}
+
+// ledgerExchange performs a data exchange with the Ledger wallet, sending it a
+// message and retrieving the response.
+//
+// The common transport header is defined as follows:
+//
+//  Description                           | Length
+//  --------------------------------------+----------
+//  Communication channel ID (big endian) | 2 bytes
+//  Command tag                           | 1 byte
+//  Packet sequence index (big endian)    | 2 bytes
+//  Payload                               | arbitrary
+//
+// The Communication channel ID allows commands multiplexing over the same
+// physical link. It is not used for the time being, and should be set to 0101
+// to avoid compatibility issues with implementations ignoring a leading 00 byte.
+//
+// The Command tag describes the message content. Use TAG_APDU (0x05) for standard
+// APDU payloads, or TAG_PING (0x02) for a simple link test.
+//
+// The Packet sequence index describes the current sequence for fragmented payloads.
+// The first fragment index is 0x00.
+//
+// APDU Command payloads are encoded as follows:
+//
+//  Description              | Length
+//  -----------------------------------
+//  APDU length (big endian) | 2 bytes
+//  APDU CLA                 | 1 byte
+//  APDU INS                 | 1 byte
+//  APDU P1                  | 1 byte
+//  APDU P2                  | 1 byte
+//  APDU length              | 1 byte
+//  Optional APDU data       | arbitrary
+func (w *ledgerDriver) ledgerExchange(opcode ledgerOpcode, p1 ledgerParam1, p2 ledgerParam2, data []byte) ([]byte, error) {
+	// Construct the message payload, possibly split into multiple chunks
+	apdu := make([]byte, 2, 7+len(data))
+
+	binary.BigEndian.PutUint16(apdu, uint16(5+len(data)))
+	apdu = append(apdu, []byte{0xe0, byte(opcode), byte(p1), byte(p2), byte(len(data))}...)
+	apdu = append(apdu, data...)
+
+	// Stream all the chunks to the device
+	header := []byte{0x01, 0x01, 0x05, 0x00, 0x00} // Channel ID and command tag appended
+	chunk := make([]byte, 64)
+	space := len(chunk) - len(header)
+
+	for i := 0; len(apdu) > 0; i++ {
+		// Construct the new message to stream
+		chunk = append(chunk[:0], header...)
+		binary.BigEndian.PutUint16(chunk[3:], uint16(i))
+
+		if len(apdu) > space {
+			chunk = append(chunk, apdu[:space]...)
+			apdu = apdu[space:]
+		} else {
+			chunk = append(chunk, apdu...)
+			apdu = nil
+		}
+		// Send over to the device
+		w.log.Trace("Data chunk sent to the Ledger", "chunk", hexutil.Bytes(chunk))
+		if _, err := w.device.Write(chunk); err != nil {
+			return nil, err
+		}
+	}
+	// Stream the reply back from the wallet in 64 byte chunks
+	var reply []byte
+	chunk = chunk[:64] // Yeah, we surely have enough space
+	for {
+		// Read the next chunk from the Ledger wallet
+		if _, err := io.ReadFull(w.device, chunk); err != nil {
+			return nil, err
+		}
+		w.log.Trace("Data chunk received from the Ledger", "chunk", hexutil.Bytes(chunk))
+
+		// Make sure the transport header matches
+		if chunk[0] != 0x01 || chunk[1] != 0x01 || chunk[2] != 0x05 {
+			return nil, errLedgerReplyInvalidHeader
+		}
+		// If it's the first chunk, retrieve the total message length
+		var payload []byte
+
+		if chunk[3] == 0x00 && chunk[4] == 0x00 {
+			reply = make([]byte, 0, int(binary.BigEndian.Uint16(chunk[5:7])))
+			payload = chunk[7:]
+		} else {
+			payload = chunk[5:]
+		}
+		// Append to the reply and stop when filled up
+		if left := cap(reply) - len(reply); left > len(payload) {
+			reply = append(reply, payload...)
+		} else {
+			reply = append(reply, payload[:left]...)
+			break
+		}
+	}
+	return reply[:len(reply)-2], nil
+}
diff --git a/accounts/usbwallet/ledger_wallet.go b/accounts/usbwallet/ledger_wallet.go
deleted file mode 100644
index f1beebb2c..000000000
--- a/accounts/usbwallet/ledger_wallet.go
+++ /dev/null
@@ -1,903 +0,0 @@
-// Copyright 2017 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-// This file contains the implementation for interacting with the Ledger hardware
-// wallets. The wire protocol spec can be found in the Ledger Blue GitHub repo:
-// https://raw.githubusercontent.com/LedgerHQ/blue-app-eth/master/doc/ethapp.asc
-
-package usbwallet
-
-import (
-	"context"
-	"encoding/binary"
-	"encoding/hex"
-	"errors"
-	"fmt"
-	"io"
-	"math/big"
-	"sync"
-	"time"
-
-	ethereum "github.com/ethereum/go-ethereum"
-	"github.com/ethereum/go-ethereum/accounts"
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/ethereum/go-ethereum/core/types"
-	"github.com/ethereum/go-ethereum/log"
-	"github.com/ethereum/go-ethereum/rlp"
-	"github.com/karalabe/hid"
-)
-
-// Maximum time between wallet health checks to detect USB unplugs.
-const ledgerHeartbeatCycle = time.Second
-
-// Minimum time to wait between self derivation attempts, even it the user is
-// requesting accounts like crazy.
-const ledgerSelfDeriveThrottling = time.Second
-
-// ledgerOpcode is an enumeration encoding the supported Ledger opcodes.
-type ledgerOpcode byte
-
-// ledgerParam1 is an enumeration encoding the supported Ledger parameters for
-// specific opcodes. The same parameter values may be reused between opcodes.
-type ledgerParam1 byte
-
-// ledgerParam2 is an enumeration encoding the supported Ledger parameters for
-// specific opcodes. The same parameter values may be reused between opcodes.
-type ledgerParam2 byte
-
-const (
-	ledgerOpRetrieveAddress  ledgerOpcode = 0x02 // Returns the public key and Ethereum address for a given BIP 32 path
-	ledgerOpSignTransaction  ledgerOpcode = 0x04 // Signs an Ethereum transaction after having the user validate the parameters
-	ledgerOpGetConfiguration ledgerOpcode = 0x06 // Returns specific wallet application configuration
-
-	ledgerP1DirectlyFetchAddress    ledgerParam1 = 0x00 // Return address directly from the wallet
-	ledgerP1ConfirmFetchAddress     ledgerParam1 = 0x01 // Require a user confirmation before returning the address
-	ledgerP1InitTransactionData     ledgerParam1 = 0x00 // First transaction data block for signing
-	ledgerP1ContTransactionData     ledgerParam1 = 0x80 // Subsequent transaction data block for signing
-	ledgerP2DiscardAddressChainCode ledgerParam2 = 0x00 // Do not return the chain code along with the address
-	ledgerP2ReturnAddressChainCode  ledgerParam2 = 0x01 // Require a user confirmation before returning the address
-)
-
-// errReplyInvalidHeader is the error message returned by a Ledger data exchange
-// if the device replies with a mismatching header. This usually means the device
-// is in browser mode.
-var errReplyInvalidHeader = errors.New("invalid reply header")
-
-// errInvalidVersionReply is the error message returned by a Ledger version retrieval
-// when a response does arrive, but it does not contain the expected data.
-var errInvalidVersionReply = errors.New("invalid version reply")
-
-// ledgerWallet represents a live USB Ledger hardware wallet.
-type ledgerWallet struct {
-	hub *LedgerHub    // USB hub the device originates from (TODO(karalabe): remove if hotplug lands on Windows)
-	url *accounts.URL // Textual URL uniquely identifying this wallet
-
-	info    hid.DeviceInfo // Known USB device infos about the wallet
-	device  *hid.Device    // USB device advertising itself as a Ledger wallet
-	failure error          // Any failure that would make the device unusable
-
-	version  [3]byte                                    // Current version of the Ledger Ethereum app (zero if app is offline)
-	browser  bool                                       // Flag whether the Ledger is in browser mode (reply channel mismatch)
-	accounts []accounts.Account                         // List of derive accounts pinned on the Ledger
-	paths    map[common.Address]accounts.DerivationPath // Known derivation paths for signing operations
-
-	deriveNextPath accounts.DerivationPath   // Next derivation path for account auto-discovery
-	deriveNextAddr common.Address            // Next derived account address for auto-discovery
-	deriveChain    ethereum.ChainStateReader // Blockchain state reader to discover used account with
-	deriveReq      chan chan struct{}        // Channel to request a self-derivation on
-	deriveQuit     chan chan error           // Channel to terminate the self-deriver with
-
-	healthQuit chan chan error
-
-	// Locking a hardware wallet is a bit special. Since hardware devices are lower
-	// performing, any communication with them might take a non negligible amount of
-	// time. Worse still, waiting for user confirmation can take arbitrarily long,
-	// but exclusive communication must be upheld during. Locking the entire wallet
-	// in the mean time however would stall any parts of the system that don't want
-	// to communicate, just read some state (e.g. list the accounts).
-	//
-	// As such, a hardware wallet needs two locks to function correctly. A state
-	// lock can be used to protect the wallet's software-side internal state, which
-	// must not be held exlusively during hardware communication. A communication
-	// lock can be used to achieve exclusive access to the device itself, this one
-	// however should allow "skipping" waiting for operations that might want to
-	// use the device, but can live without too (e.g. account self-derivation).
-	//
-	// Since we have two locks, it's important to know how to properly use them:
-	//   - Communication requires the `device` to not change, so obtaining the
-	//     commsLock should be done after having a stateLock.
-	//   - Communication must not disable read access to the wallet state, so it
-	//     must only ever hold a *read* lock to stateLock.
-	commsLock chan struct{} // Mutex (buf=1) for the USB comms without keeping the state locked
-	stateLock sync.RWMutex  // Protects read and write access to the wallet struct fields
-
-	log log.Logger // Contextual logger to tag the ledger with its id
-}
-
-// URL implements accounts.Wallet, returning the URL of the Ledger device.
-func (w *ledgerWallet) URL() accounts.URL {
-	return *w.url // Immutable, no need for a lock
-}
-
-// Status implements accounts.Wallet, always whether the Ledger is opened, closed
-// or whether the Ethereum app was not started on it.
-func (w *ledgerWallet) Status() string {
-	w.stateLock.RLock() // No device communication, state lock is enough
-	defer w.stateLock.RUnlock()
-
-	if w.failure != nil {
-		return fmt.Sprintf("Failed: %v", w.failure)
-	}
-	if w.device == nil {
-		return "Closed"
-	}
-	if w.browser {
-		return "Ethereum app in browser mode"
-	}
-	if w.offline() {
-		return "Ethereum app offline"
-	}
-	return fmt.Sprintf("Ethereum app v%d.%d.%d online", w.version[0], w.version[1], w.version[2])
-}
-
-// offline returns whether the wallet and the Ethereum app is offline or not.
-//
-// The method assumes that the state lock is held!
-func (w *ledgerWallet) offline() bool {
-	return w.version == [3]byte{0, 0, 0}
-}
-
-// failed returns if the USB device wrapped by the wallet failed for some reason.
-// This is used by the device scanner to report failed wallets as departed.
-//
-// The method assumes that the state lock is *not* held!
-func (w *ledgerWallet) failed() bool {
-	w.stateLock.RLock() // No device communication, state lock is enough
-	defer w.stateLock.RUnlock()
-
-	return w.failure != nil
-}
-
-// Open implements accounts.Wallet, attempting to open a USB connection to the
-// Ledger hardware wallet. The Ledger does not require a user passphrase, so that
-// parameter is silently discarded.
-func (w *ledgerWallet) Open(passphrase string) error {
-	w.stateLock.Lock() // State lock is enough since there's no connection yet at this point
-	defer w.stateLock.Unlock()
-
-	// If the wallet was already opened, don't try to open again
-	if w.device != nil {
-		return accounts.ErrWalletAlreadyOpen
-	}
-	// Otherwise iterate over all USB devices and find this again (no way to directly do this)
-	device, err := w.info.Open()
-	if err != nil {
-		return err
-	}
-	// Wallet seems to be successfully opened, guess if the Ethereum app is running
-	w.device = device
-	w.commsLock = make(chan struct{}, 1)
-	w.commsLock <- struct{}{} // Enable lock
-
-	w.paths = make(map[common.Address]accounts.DerivationPath)
-
-	w.deriveReq = make(chan chan struct{})
-	w.deriveQuit = make(chan chan error)
-	w.healthQuit = make(chan chan error)
-
-	defer func() {
-		go w.heartbeat()
-		go w.selfDerive()
-	}()
-
-	if _, err = w.ledgerDerive(accounts.DefaultBaseDerivationPath); err != nil {
-		// Ethereum app is not running or in browser mode, nothing more to do, return
-		if err == errReplyInvalidHeader {
-			w.browser = true
-		}
-		return nil
-	}
-	// Try to resolve the Ethereum app's version, will fail prior to v1.0.2
-	if w.version, err = w.ledgerVersion(); err != nil {
-		w.version = [3]byte{1, 0, 0} // Assume worst case, can't verify if v1.0.0 or v1.0.1
-	}
-	return nil
-}
-
-// heartbeat is a health check loop for the Ledger wallets to periodically verify
-// whether they are still present or if they malfunctioned. It is needed because:
-//  - libusb on Windows doesn't support hotplug, so we can't detect USB unplugs
-//  - communication timeout on the Ledger requires a device power cycle to fix
-func (w *ledgerWallet) heartbeat() {
-	w.log.Debug("Ledger health-check started")
-	defer w.log.Debug("Ledger health-check stopped")
-
-	// Execute heartbeat checks until termination or error
-	var (
-		errc chan error
-		err  error
-	)
-	for errc == nil && err == nil {
-		// Wait until termination is requested or the heartbeat cycle arrives
-		select {
-		case errc = <-w.healthQuit:
-			// Termination requested
-			continue
-		case <-time.After(ledgerHeartbeatCycle):
-			// Heartbeat time
-		}
-		// Execute a tiny data exchange to see responsiveness
-		w.stateLock.RLock()
-		if w.device == nil {
-			// Terminated while waiting for the lock
-			w.stateLock.RUnlock()
-			continue
-		}
-		<-w.commsLock // Don't lock state while resolving version
-		_, err = w.ledgerVersion()
-		w.commsLock <- struct{}{}
-		w.stateLock.RUnlock()
-
-		if err != nil && err != errInvalidVersionReply {
-			w.stateLock.Lock() // Lock state to tear the wallet down
-			w.failure = err
-			w.close()
-			w.stateLock.Unlock()
-		}
-		// Ignore non hardware related errors
-		err = nil
-	}
-	// In case of error, wait for termination
-	if err != nil {
-		w.log.Debug("Ledger health-check failed", "err", err)
-		errc = <-w.healthQuit
-	}
-	errc <- err
-}
-
-// Close implements accounts.Wallet, closing the USB connection to the Ledger.
-func (w *ledgerWallet) Close() error {
-	// Ensure the wallet was opened
-	w.stateLock.RLock()
-	hQuit, dQuit := w.healthQuit, w.deriveQuit
-	w.stateLock.RUnlock()
-
-	// Terminate the health checks
-	var herr error
-	if hQuit != nil {
-		errc := make(chan error)
-		hQuit <- errc
-		herr = <-errc // Save for later, we *must* close the USB
-	}
-	// Terminate the self-derivations
-	var derr error
-	if dQuit != nil {
-		errc := make(chan error)
-		dQuit <- errc
-		derr = <-errc // Save for later, we *must* close the USB
-	}
-	// Terminate the device connection
-	w.stateLock.Lock()
-	defer w.stateLock.Unlock()
-
-	w.healthQuit = nil
-	w.deriveQuit = nil
-	w.deriveReq = nil
-
-	if err := w.close(); err != nil {
-		return err
-	}
-	if herr != nil {
-		return herr
-	}
-	return derr
-}
-
-// close is the internal wallet closer that terminates the USB connection and
-// resets all the fields to their defaults.
-//
-// Note, close assumes the state lock is held!
-func (w *ledgerWallet) close() error {
-	// Allow duplicate closes, especially for health-check failures
-	if w.device == nil {
-		return nil
-	}
-	// Close the device, clear everything, then return
-	w.device.Close()
-	w.device = nil
-
-	w.browser, w.version = false, [3]byte{}
-	w.accounts, w.paths = nil, nil
-
-	return nil
-}
-
-// Accounts implements accounts.Wallet, returning the list of accounts pinned to
-// the Ledger hardware wallet. If self-derivation was enabled, the account list
-// is periodically expanded based on current chain state.
-func (w *ledgerWallet) Accounts() []accounts.Account {
-	// Attempt self-derivation if it's running
-	reqc := make(chan struct{}, 1)
-	select {
-	case w.deriveReq <- reqc:
-		// Self-derivation request accepted, wait for it
-		<-reqc
-	default:
-		// Self-derivation offline, throttled or busy, skip
-	}
-	// Return whatever account list we ended up with
-	w.stateLock.RLock()
-	defer w.stateLock.RUnlock()
-
-	cpy := make([]accounts.Account, len(w.accounts))
-	copy(cpy, w.accounts)
-	return cpy
-}
-
-// selfDerive is an account derivation loop that upon request attempts to find
-// new non-zero accounts.
-func (w *ledgerWallet) selfDerive() {
-	w.log.Debug("Ledger self-derivation started")
-	defer w.log.Debug("Ledger self-derivation stopped")
-
-	// Execute self-derivations until termination or error
-	var (
-		reqc chan struct{}
-		errc chan error
-		err  error
-	)
-	for errc == nil && err == nil {
-		// Wait until either derivation or termination is requested
-		select {
-		case errc = <-w.deriveQuit:
-			// Termination requested
-			continue
-		case reqc = <-w.deriveReq:
-			// Account discovery requested
-		}
-		// Derivation needs a chain and device access, skip if either unavailable
-		w.stateLock.RLock()
-		if w.device == nil || w.deriveChain == nil || w.offline() {
-			w.stateLock.RUnlock()
-			reqc <- struct{}{}
-			continue
-		}
-		select {
-		case <-w.commsLock:
-		default:
-			w.stateLock.RUnlock()
-			reqc <- struct{}{}
-			continue
-		}
-		// Device lock obtained, derive the next batch of accounts
-		var (
-			accs  []accounts.Account
-			paths []accounts.DerivationPath
-
-			nextAddr = w.deriveNextAddr
-			nextPath = w.deriveNextPath
-
-			context = context.Background()
-		)
-		for empty := false; !empty; {
-			// Retrieve the next derived Ethereum account
-			if nextAddr == (common.Address{}) {
-				if nextAddr, err = w.ledgerDerive(nextPath); err != nil {
-					w.log.Warn("Ledger account derivation failed", "err", err)
-					break
-				}
-			}
-			// Check the account's status against the current chain state
-			var (
-				balance *big.Int
-				nonce   uint64
-			)
-			balance, err = w.deriveChain.BalanceAt(context, nextAddr, nil)
-			if err != nil {
-				w.log.Warn("Ledger balance retrieval failed", "err", err)
-				break
-			}
-			nonce, err = w.deriveChain.NonceAt(context, nextAddr, nil)
-			if err != nil {
-				w.log.Warn("Ledger nonce retrieval failed", "err", err)
-				break
-			}
-			// If the next account is empty, stop self-derivation, but add it nonetheless
-			if balance.Sign() == 0 && nonce == 0 {
-				empty = true
-			}
-			// We've just self-derived a new account, start tracking it locally
-			path := make(accounts.DerivationPath, len(nextPath))
-			copy(path[:], nextPath[:])
-			paths = append(paths, path)
-
-			account := accounts.Account{
-				Address: nextAddr,
-				URL:     accounts.URL{Scheme: w.url.Scheme, Path: fmt.Sprintf("%s/%s", w.url.Path, path)},
-			}
-			accs = append(accs, account)
-
-			// Display a log message to the user for new (or previously empty accounts)
-			if _, known := w.paths[nextAddr]; !known || (!empty && nextAddr == w.deriveNextAddr) {
-				w.log.Info("Ledger discovered new account", "address", nextAddr, "path", path, "balance", balance, "nonce", nonce)
-			}
-			// Fetch the next potential account
-			if !empty {
-				nextAddr = common.Address{}
-				nextPath[len(nextPath)-1]++
-			}
-		}
-		// Self derivation complete, release device lock
-		w.commsLock <- struct{}{}
-		w.stateLock.RUnlock()
-
-		// Insert any accounts successfully derived
-		w.stateLock.Lock()
-		for i := 0; i < len(accs); i++ {
-			if _, ok := w.paths[accs[i].Address]; !ok {
-				w.accounts = append(w.accounts, accs[i])
-				w.paths[accs[i].Address] = paths[i]
-			}
-		}
-		// Shift the self-derivation forward
-		// TODO(karalabe): don't overwrite changes from wallet.SelfDerive
-		w.deriveNextAddr = nextAddr
-		w.deriveNextPath = nextPath
-		w.stateLock.Unlock()
-
-		// Notify the user of termination and loop after a bit of time (to avoid trashing)
-		reqc <- struct{}{}
-		if err == nil {
-			select {
-			case errc = <-w.deriveQuit:
-				// Termination requested, abort
-			case <-time.After(ledgerSelfDeriveThrottling):
-				// Waited enough, willing to self-derive again
-			}
-		}
-	}
-	// In case of error, wait for termination
-	if err != nil {
-		w.log.Debug("Ledger self-derivation failed", "err", err)
-		errc = <-w.deriveQuit
-	}
-	errc <- err
-}
-
-// Contains implements accounts.Wallet, returning whether a particular account is
-// or is not pinned into this Ledger instance. Although we could attempt to resolve
-// unpinned accounts, that would be an non-negligible hardware operation.
-func (w *ledgerWallet) Contains(account accounts.Account) bool {
-	w.stateLock.RLock()
-	defer w.stateLock.RUnlock()
-
-	_, exists := w.paths[account.Address]
-	return exists
-}
-
-// Derive implements accounts.Wallet, deriving a new account at the specific
-// derivation path. If pin is set to true, the account will be added to the list
-// of tracked accounts.
-func (w *ledgerWallet) Derive(path accounts.DerivationPath, pin bool) (accounts.Account, error) {
-	// Try to derive the actual account and update its URL if successful
-	w.stateLock.RLock() // Avoid device disappearing during derivation
-
-	if w.device == nil || w.offline() {
-		w.stateLock.RUnlock()
-		return accounts.Account{}, accounts.ErrWalletClosed
-	}
-	<-w.commsLock // Avoid concurrent hardware access
-	address, err := w.ledgerDerive(path)
-	w.commsLock <- struct{}{}
-
-	w.stateLock.RUnlock()
-
-	// If an error occurred or no pinning was requested, return
-	if err != nil {
-		return accounts.Account{}, err
-	}
-	account := accounts.Account{
-		Address: address,
-		URL:     accounts.URL{Scheme: w.url.Scheme, Path: fmt.Sprintf("%s/%s", w.url.Path, path)},
-	}
-	if !pin {
-		return account, nil
-	}
-	// Pinning needs to modify the state
-	w.stateLock.Lock()
-	defer w.stateLock.Unlock()
-
-	if _, ok := w.paths[address]; !ok {
-		w.accounts = append(w.accounts, account)
-		w.paths[address] = path
-	}
-	return account, nil
-}
-
-// SelfDerive implements accounts.Wallet, trying to discover accounts that the
-// user used previously (based on the chain state), but ones that he/she did not
-// explicitly pin to the wallet manually. To avoid chain head monitoring, self
-// derivation only runs during account listing (and even then throttled).
-func (w *ledgerWallet) SelfDerive(base accounts.DerivationPath, chain ethereum.ChainStateReader) {
-	w.stateLock.Lock()
-	defer w.stateLock.Unlock()
-
-	w.deriveNextPath = make(accounts.DerivationPath, len(base))
-	copy(w.deriveNextPath[:], base[:])
-
-	w.deriveNextAddr = common.Address{}
-	w.deriveChain = chain
-}
-
-// SignHash implements accounts.Wallet, however signing arbitrary data is not
-// supported for Ledger wallets, so this method will always return an error.
-func (w *ledgerWallet) SignHash(acc accounts.Account, hash []byte) ([]byte, error) {
-	return nil, accounts.ErrNotSupported
-}
-
-// SignTx implements accounts.Wallet. It sends the transaction over to the Ledger
-// wallet to request a confirmation from the user. It returns either the signed
-// transaction or a failure if the user denied the transaction.
-//
-// Note, if the version of the Ethereum application running on the Ledger wallet is
-// too old to sign EIP-155 transactions, but such is requested nonetheless, an error
-// will be returned opposed to silently signing in Homestead mode.
-func (w *ledgerWallet) SignTx(account accounts.Account, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
-	w.stateLock.RLock() // Comms have own mutex, this is for the state fields
-	defer w.stateLock.RUnlock()
-
-	// If the wallet is closed, or the Ethereum app doesn't run, abort
-	if w.device == nil || w.offline() {
-		return nil, accounts.ErrWalletClosed
-	}
-	// Make sure the requested account is contained within
-	path, ok := w.paths[account.Address]
-	if !ok {
-		return nil, accounts.ErrUnknownAccount
-	}
-	// Ensure the wallet is capable of signing the given transaction
-	if chainID != nil && w.version[0] <= 1 && w.version[1] <= 0 && w.version[2] <= 2 {
-		return nil, fmt.Errorf("Ledger v%d.%d.%d doesn't support signing this transaction, please update to v1.0.3 at least", w.version[0], w.version[1], w.version[2])
-	}
-	// All infos gathered and metadata checks out, request signing
-	<-w.commsLock
-	defer func() { w.commsLock <- struct{}{} }()
-
-	// Ensure the device isn't screwed with while user confirmation is pending
-	// TODO(karalabe): remove if hotplug lands on Windows
-	w.hub.commsLock.Lock()
-	w.hub.commsPend++
-	w.hub.commsLock.Unlock()
-
-	defer func() {
-		w.hub.commsLock.Lock()
-		w.hub.commsPend--
-		w.hub.commsLock.Unlock()
-	}()
-	return w.ledgerSign(path, account.Address, tx, chainID)
-}
-
-// SignHashWithPassphrase implements accounts.Wallet, however signing arbitrary
-// data is not supported for Ledger wallets, so this method will always return
-// an error.
-func (w *ledgerWallet) SignHashWithPassphrase(account accounts.Account, passphrase string, hash []byte) ([]byte, error) {
-	return nil, accounts.ErrNotSupported
-}
-
-// SignTxWithPassphrase implements accounts.Wallet, attempting to sign the given
-// transaction with the given account using passphrase as extra authentication.
-// Since the Ledger does not support extra passphrases, it is silently ignored.
-func (w *ledgerWallet) SignTxWithPassphrase(account accounts.Account, passphrase string, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
-	return w.SignTx(account, tx, chainID)
-}
-
-// ledgerVersion retrieves the current version of the Ethereum wallet app running
-// on the Ledger wallet.
-//
-// The version retrieval protocol is defined as follows:
-//
-//   CLA | INS | P1 | P2 | Lc | Le
-//   ----+-----+----+----+----+---
-//    E0 | 06  | 00 | 00 | 00 | 04
-//
-// With no input data, and the output data being:
-//
-//   Description                                        | Length
-//   ---------------------------------------------------+--------
-//   Flags 01: arbitrary data signature enabled by user | 1 byte
-//   Application major version                          | 1 byte
-//   Application minor version                          | 1 byte
-//   Application patch version                          | 1 byte
-func (w *ledgerWallet) ledgerVersion() ([3]byte, error) {
-	// Send the request and wait for the response
-	reply, err := w.ledgerExchange(ledgerOpGetConfiguration, 0, 0, nil)
-	if err != nil {
-		return [3]byte{}, err
-	}
-	if len(reply) != 4 {
-		return [3]byte{}, errInvalidVersionReply
-	}
-	// Cache the version for future reference
-	var version [3]byte
-	copy(version[:], reply[1:])
-	return version, nil
-}
-
-// ledgerDerive retrieves the currently active Ethereum address from a Ledger
-// wallet at the specified derivation path.
-//
-// The address derivation protocol is defined as follows:
-//
-//   CLA | INS | P1 | P2 | Lc  | Le
-//   ----+-----+----+----+-----+---
-//    E0 | 02  | 00 return address
-//               01 display address and confirm before returning
-//                  | 00: do not return the chain code
-//                  | 01: return the chain code
-//                       | var | 00
-//
-// Where the input data is:
-//
-//   Description                                      | Length
-//   -------------------------------------------------+--------
-//   Number of BIP 32 derivations to perform (max 10) | 1 byte
-//   First derivation index (big endian)              | 4 bytes
-//   ...                                              | 4 bytes
-//   Last derivation index (big endian)               | 4 bytes
-//
-// And the output data is:
-//
-//   Description             | Length
-//   ------------------------+-------------------
-//   Public Key length       | 1 byte
-//   Uncompressed Public Key | arbitrary
-//   Ethereum address length | 1 byte
-//   Ethereum address        | 40 bytes hex ascii
-//   Chain code if requested | 32 bytes
-func (w *ledgerWallet) ledgerDerive(derivationPath []uint32) (common.Address, error) {
-	// Flatten the derivation path into the Ledger request
-	path := make([]byte, 1+4*len(derivationPath))
-	path[0] = byte(len(derivationPath))
-	for i, component := range derivationPath {
-		binary.BigEndian.PutUint32(path[1+4*i:], component)
-	}
-	// Send the request and wait for the response
-	reply, err := w.ledgerExchange(ledgerOpRetrieveAddress, ledgerP1DirectlyFetchAddress, ledgerP2DiscardAddressChainCode, path)
-	if err != nil {
-		return common.Address{}, err
-	}
-	// Discard the public key, we don't need that for now
-	if len(reply) < 1 || len(reply) < 1+int(reply[0]) {
-		return common.Address{}, errors.New("reply lacks public key entry")
-	}
-	reply = reply[1+int(reply[0]):]
-
-	// Extract the Ethereum hex address string
-	if len(reply) < 1 || len(reply) < 1+int(reply[0]) {
-		return common.Address{}, errors.New("reply lacks address entry")
-	}
-	hexstr := reply[1 : 1+int(reply[0])]
-
-	// Decode the hex sting into an Ethereum address and return
-	var address common.Address
-	hex.Decode(address[:], hexstr)
-	return address, nil
-}
-
-// ledgerSign sends the transaction to the Ledger wallet, and waits for the user
-// to confirm or deny the transaction.
-//
-// The transaction signing protocol is defined as follows:
-//
-//   CLA | INS | P1 | P2 | Lc  | Le
-//   ----+-----+----+----+-----+---
-//    E0 | 04  | 00: first transaction data block
-//               80: subsequent transaction data block
-//                  | 00 | variable | variable
-//
-// Where the input for the first transaction block (first 255 bytes) is:
-//
-//   Description                                      | Length
-//   -------------------------------------------------+----------
-//   Number of BIP 32 derivations to perform (max 10) | 1 byte
-//   First derivation index (big endian)              | 4 bytes
-//   ...                                              | 4 bytes
-//   Last derivation index (big endian)               | 4 bytes
-//   RLP transaction chunk                            | arbitrary
-//
-// And the input for subsequent transaction blocks (first 255 bytes) are:
-//
-//   Description           | Length
-//   ----------------------+----------
-//   RLP transaction chunk | arbitrary
-//
-// And the output data is:
-//
-//   Description | Length
-//   ------------+---------
-//   signature V | 1 byte
-//   signature R | 32 bytes
-//   signature S | 32 bytes
-func (w *ledgerWallet) ledgerSign(derivationPath []uint32, address common.Address, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
-	// Flatten the derivation path into the Ledger request
-	path := make([]byte, 1+4*len(derivationPath))
-	path[0] = byte(len(derivationPath))
-	for i, component := range derivationPath {
-		binary.BigEndian.PutUint32(path[1+4*i:], component)
-	}
-	// Create the transaction RLP based on whether legacy or EIP155 signing was requeste
-	var (
-		txrlp []byte
-		err   error
-	)
-	if chainID == nil {
-		if txrlp, err = rlp.EncodeToBytes([]interface{}{tx.Nonce(), tx.GasPrice(), tx.Gas(), tx.To(), tx.Value(), tx.Data()}); err != nil {
-			return nil, err
-		}
-	} else {
-		if txrlp, err = rlp.EncodeToBytes([]interface{}{tx.Nonce(), tx.GasPrice(), tx.Gas(), tx.To(), tx.Value(), tx.Data(), chainID, big.NewInt(0), big.NewInt(0)}); err != nil {
-			return nil, err
-		}
-	}
-	payload := append(path, txrlp...)
-
-	// Send the request and wait for the response
-	var (
-		op    = ledgerP1InitTransactionData
-		reply []byte
-	)
-	for len(payload) > 0 {
-		// Calculate the size of the next data chunk
-		chunk := 255
-		if chunk > len(payload) {
-			chunk = len(payload)
-		}
-		// Send the chunk over, ensuring it's processed correctly
-		reply, err = w.ledgerExchange(ledgerOpSignTransaction, op, 0, payload[:chunk])
-		if err != nil {
-			return nil, err
-		}
-		// Shift the payload and ensure subsequent chunks are marked as such
-		payload = payload[chunk:]
-		op = ledgerP1ContTransactionData
-	}
-	// Extract the Ethereum signature and do a sanity validation
-	if len(reply) != 65 {
-		return nil, errors.New("reply lacks signature")
-	}
-	signature := append(reply[1:], reply[0])
-
-	// Create the correct signer and signature transform based on the chain ID
-	var signer types.Signer
-	if chainID == nil {
-		signer = new(types.HomesteadSigner)
-	} else {
-		signer = types.NewEIP155Signer(chainID)
-		signature[64] = signature[64] - byte(chainID.Uint64()*2+35)
-	}
-	// Inject the final signature into the transaction and sanity check the sender
-	signed, err := tx.WithSignature(signer, signature)
-	if err != nil {
-		return nil, err
-	}
-	sender, err := types.Sender(signer, signed)
-	if err != nil {
-		return nil, err
-	}
-	if sender != address {
-		return nil, fmt.Errorf("signer mismatch: expected %s, got %s", address.Hex(), sender.Hex())
-	}
-	return signed, nil
-}
-
-// ledgerExchange performs a data exchange with the Ledger wallet, sending it a
-// message and retrieving the response.
-//
-// The common transport header is defined as follows:
-//
-//  Description                           | Length
-//  --------------------------------------+----------
-//  Communication channel ID (big endian) | 2 bytes
-//  Command tag                           | 1 byte
-//  Packet sequence index (big endian)    | 2 bytes
-//  Payload                               | arbitrary
-//
-// The Communication channel ID allows commands multiplexing over the same
-// physical link. It is not used for the time being, and should be set to 0101
-// to avoid compatibility issues with implementations ignoring a leading 00 byte.
-//
-// The Command tag describes the message content. Use TAG_APDU (0x05) for standard
-// APDU payloads, or TAG_PING (0x02) for a simple link test.
-//
-// The Packet sequence index describes the current sequence for fragmented payloads.
-// The first fragment index is 0x00.
-//
-// APDU Command payloads are encoded as follows:
-//
-//  Description              | Length
-//  -----------------------------------
-//  APDU length (big endian) | 2 bytes
-//  APDU CLA                 | 1 byte
-//  APDU INS                 | 1 byte
-//  APDU P1                  | 1 byte
-//  APDU P2                  | 1 byte
-//  APDU length              | 1 byte
-//  Optional APDU data       | arbitrary
-func (w *ledgerWallet) ledgerExchange(opcode ledgerOpcode, p1 ledgerParam1, p2 ledgerParam2, data []byte) ([]byte, error) {
-	// Construct the message payload, possibly split into multiple chunks
-	apdu := make([]byte, 2, 7+len(data))
-
-	binary.BigEndian.PutUint16(apdu, uint16(5+len(data)))
-	apdu = append(apdu, []byte{0xe0, byte(opcode), byte(p1), byte(p2), byte(len(data))}...)
-	apdu = append(apdu, data...)
-
-	// Stream all the chunks to the device
-	header := []byte{0x01, 0x01, 0x05, 0x00, 0x00} // Channel ID and command tag appended
-	chunk := make([]byte, 64)
-	space := len(chunk) - len(header)
-
-	for i := 0; len(apdu) > 0; i++ {
-		// Construct the new message to stream
-		chunk = append(chunk[:0], header...)
-		binary.BigEndian.PutUint16(chunk[3:], uint16(i))
-
-		if len(apdu) > space {
-			chunk = append(chunk, apdu[:space]...)
-			apdu = apdu[space:]
-		} else {
-			chunk = append(chunk, apdu...)
-			apdu = nil
-		}
-		// Send over to the device
-		w.log.Trace("Data chunk sent to the Ledger", "chunk", hexutil.Bytes(chunk))
-		if _, err := w.device.Write(chunk); err != nil {
-			return nil, err
-		}
-	}
-	// Stream the reply back from the wallet in 64 byte chunks
-	var reply []byte
-	chunk = chunk[:64] // Yeah, we surely have enough space
-	for {
-		// Read the next chunk from the Ledger wallet
-		if _, err := io.ReadFull(w.device, chunk); err != nil {
-			return nil, err
-		}
-		w.log.Trace("Data chunk received from the Ledger", "chunk", hexutil.Bytes(chunk))
-
-		// Make sure the transport header matches
-		if chunk[0] != 0x01 || chunk[1] != 0x01 || chunk[2] != 0x05 {
-			return nil, errReplyInvalidHeader
-		}
-		// If it's the first chunk, retrieve the total message length
-		var payload []byte
-
-		if chunk[3] == 0x00 && chunk[4] == 0x00 {
-			reply = make([]byte, 0, int(binary.BigEndian.Uint16(chunk[5:7])))
-			payload = chunk[7:]
-		} else {
-			payload = chunk[5:]
-		}
-		// Append to the reply and stop when filled up
-		if left := cap(reply) - len(reply); left > len(payload) {
-			reply = append(reply, payload...)
-		} else {
-			reply = append(reply, payload[:left]...)
-			break
-		}
-	}
-	return reply[:len(reply)-2], nil
-}
diff --git a/accounts/usbwallet/trezor.go b/accounts/usbwallet/trezor.go
new file mode 100644
index 000000000..159cb2ea9
--- /dev/null
+++ b/accounts/usbwallet/trezor.go
@@ -0,0 +1,330 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// This file contains the implementation for interacting with the Trezor hardware
+// wallets. The wire protocol spec can be found on the SatoshiLabs website:
+// https://doc.satoshilabs.com/trezor-tech/api-protobuf.html
+
+package usbwallet
+
+import (
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"io"
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/accounts"
+	"github.com/ethereum/go-ethereum/accounts/usbwallet/internal/trezor"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/golang/protobuf/proto"
+)
+
+// ErrTrezorPINNeeded is returned if opening the trezor requires a PIN code. In
+// this case, the calling application should display a pinpad and send back the
+// encoded passphrase.
+var ErrTrezorPINNeeded = errors.New("trezor: pin needed")
+
+// errTrezorReplyInvalidHeader is the error message returned by a Trezor data exchange
+// if the device replies with a mismatching header. This usually means the device
+// is in browser mode.
+var errTrezorReplyInvalidHeader = errors.New("trezor: invalid reply header")
+
+// trezorDriver implements the communication with a Trezor hardware wallet.
+type trezorDriver struct {
+	device  io.ReadWriter // USB device connection to communicate through
+	version [3]uint32     // Current version of the Trezor firmware
+	label   string        // Current textual label of the Trezor device
+	pinwait bool          // Flags whether the device is waiting for PIN entry
+	failure error         // Any failure that would make the device unusable
+	log     log.Logger    // Contextual logger to tag the trezor with its id
+}
+
+// newTrezorDriver creates a new instance of a Trezor USB protocol driver.
+func newTrezorDriver(logger log.Logger) driver {
+	return &trezorDriver{
+		log: logger,
+	}
+}
+
+// Status implements accounts.Wallet, always whether the Trezor is opened, closed
+// or whether the Ethereum app was not started on it.
+func (w *trezorDriver) Status() (string, error) {
+	if w.failure != nil {
+		return fmt.Sprintf("Failed: %v", w.failure), w.failure
+	}
+	if w.device == nil {
+		return "Closed", w.failure
+	}
+	if w.pinwait {
+		return fmt.Sprintf("Trezor v%d.%d.%d '%s' waiting for PIN", w.version[0], w.version[1], w.version[2], w.label), w.failure
+	}
+	return fmt.Sprintf("Trezor v%d.%d.%d '%s' online", w.version[0], w.version[1], w.version[2], w.label), w.failure
+}
+
+// Open implements usbwallet.driver, attempting to initialize the connection to
+// the Trezor hardware wallet. Initializing the Trezor is a two phase operation:
+//  * The first phase is to initialize the connection and read the wallet's
+//    features. This phase is invoked is the provided passphrase is empty. The
+//    device will display the pinpad as a result and will return an appropriate
+//    error to notify the user that a second open phase is needed.
+//  * The second phase is to unlock access to the Trezor, which is done by the
+//    user actually providing a passphrase mapping a keyboard keypad to the pin
+//    number of the user (shuffled according to the pinpad displayed).
+func (w *trezorDriver) Open(device io.ReadWriter, passphrase string) error {
+	w.device, w.failure = device, nil
+
+	// If phase 1 is requested, init the connection and wait for user callback
+	if passphrase == "" {
+		// If we're already waiting for a PIN entry, insta-return
+		if w.pinwait {
+			return ErrTrezorPINNeeded
+		}
+		// Initialize a connection to the device
+		features := new(trezor.Features)
+		if _, err := w.trezorExchange(&trezor.Initialize{}, features); err != nil {
+			return err
+		}
+		w.version = [3]uint32{features.GetMajorVersion(), features.GetMinorVersion(), features.GetPatchVersion()}
+		w.label = features.GetLabel()
+
+		// Do a manual ping, forcing the device to ask for its PIN
+		askPin := true
+		res, err := w.trezorExchange(&trezor.Ping{PinProtection: &askPin}, new(trezor.PinMatrixRequest), new(trezor.Success))
+		if err != nil {
+			return err
+		}
+		// Only return the PIN request if the device wasn't unlocked until now
+		if res == 1 {
+			return nil // Device responded with trezor.Success
+		}
+		w.pinwait = true
+		return ErrTrezorPINNeeded
+	}
+	// Phase 2 requested with actual PIN entry
+	w.pinwait = false
+
+	if _, err := w.trezorExchange(&trezor.PinMatrixAck{Pin: &passphrase}, new(trezor.Success)); err != nil {
+		w.failure = err
+		return err
+	}
+	return nil
+}
+
+// Close implements usbwallet.driver, cleaning up and metadata maintained within
+// the Trezor driver.
+func (w *trezorDriver) Close() error {
+	w.version, w.label, w.pinwait = [3]uint32{}, "", false
+	return nil
+}
+
+// Heartbeat implements usbwallet.driver, performing a sanity check against the
+// Trezor to see if it's still online.
+func (w *trezorDriver) Heartbeat() error {
+	if _, err := w.trezorExchange(&trezor.Ping{}, new(trezor.Success)); err != nil {
+		w.failure = err
+		return err
+	}
+	return nil
+}
+
+// Derive implements usbwallet.driver, sending a derivation request to the Trezor
+// and returning the Ethereum address located on that derivation path.
+func (w *trezorDriver) Derive(path accounts.DerivationPath) (common.Address, error) {
+	return w.trezorDerive(path)
+}
+
+// SignTx implements usbwallet.driver, sending the transaction to the Trezor and
+// waiting for the user to confirm or deny the transaction.
+func (w *trezorDriver) SignTx(path accounts.DerivationPath, tx *types.Transaction, chainID *big.Int) (common.Address, *types.Transaction, error) {
+	if w.device == nil {
+		return common.Address{}, nil, accounts.ErrWalletClosed
+	}
+	return w.trezorSign(path, tx, chainID)
+}
+
+// trezorDerive sends a derivation request to the Trezor device and returns the
+// Ethereum address located on that path.
+func (w *trezorDriver) trezorDerive(derivationPath []uint32) (common.Address, error) {
+	address := new(trezor.EthereumAddress)
+	if _, err := w.trezorExchange(&trezor.EthereumGetAddress{AddressN: derivationPath}, address); err != nil {
+		return common.Address{}, err
+	}
+	return common.BytesToAddress(address.GetAddress()), nil
+}
+
+// trezorSign sends the transaction to the Trezor wallet, and waits for the user
+// to confirm or deny the transaction.
+func (w *trezorDriver) trezorSign(derivationPath []uint32, tx *types.Transaction, chainID *big.Int) (common.Address, *types.Transaction, error) {
+	// Create the transaction initiation message
+	data := tx.Data()
+	length := uint32(len(data))
+
+	request := &trezor.EthereumSignTx{
+		AddressN:   derivationPath,
+		Nonce:      new(big.Int).SetUint64(tx.Nonce()).Bytes(),
+		GasPrice:   tx.GasPrice().Bytes(),
+		GasLimit:   tx.Gas().Bytes(),
+		Value:      tx.Value().Bytes(),
+		DataLength: &length,
+	}
+	if to := tx.To(); to != nil {
+		request.To = (*to)[:] // Non contract deploy, set recipient explicitly
+	}
+	if length > 1024 { // Send the data chunked if that was requested
+		request.DataInitialChunk, data = data[:1024], data[1024:]
+	} else {
+		request.DataInitialChunk, data = data, nil
+	}
+	if chainID != nil { // EIP-155 transaction, set chain ID explicitly (only 32 bit is supported!?)
+		id := uint32(chainID.Int64())
+		request.ChainId = &id
+	}
+	// Send the initiation message and stream content until a signature is returned
+	response := new(trezor.EthereumTxRequest)
+	if _, err := w.trezorExchange(request, response); err != nil {
+		return common.Address{}, nil, err
+	}
+	for response.DataLength != nil && int(*response.DataLength) <= len(data) {
+		chunk := data[:*response.DataLength]
+		data = data[*response.DataLength:]
+
+		if _, err := w.trezorExchange(&trezor.EthereumTxAck{DataChunk: chunk}, response); err != nil {
+			return common.Address{}, nil, err
+		}
+	}
+	// Extract the Ethereum signature and do a sanity validation
+	if len(response.GetSignatureR()) == 0 || len(response.GetSignatureS()) == 0 || response.GetSignatureV() == 0 {
+		return common.Address{}, nil, errors.New("reply lacks signature")
+	}
+	signature := append(append(response.GetSignatureR(), response.GetSignatureS()...), byte(response.GetSignatureV()))
+
+	// Create the correct signer and signature transform based on the chain ID
+	var signer types.Signer
+	if chainID == nil {
+		signer = new(types.HomesteadSigner)
+	} else {
+		signer = types.NewEIP155Signer(chainID)
+		signature[64] = signature[64] - byte(chainID.Uint64()*2+35)
+	}
+	// Inject the final signature into the transaction and sanity check the sender
+	signed, err := tx.WithSignature(signer, signature)
+	if err != nil {
+		return common.Address{}, nil, err
+	}
+	sender, err := types.Sender(signer, signed)
+	if err != nil {
+		return common.Address{}, nil, err
+	}
+	return sender, signed, nil
+}
+
+// trezorExchange performs a data exchange with the Trezor wallet, sending it a
+// message and retrieving the response. If multiple responses are possible, the
+// method will also return the index of the destination object used.
+func (w *trezorDriver) trezorExchange(req proto.Message, results ...proto.Message) (int, error) {
+	// Construct the original message payload to chunk up
+	data, err := proto.Marshal(req)
+	if err != nil {
+		return 0, err
+	}
+	payload := make([]byte, 8+len(data))
+	copy(payload, []byte{0x23, 0x23})
+	binary.BigEndian.PutUint16(payload[2:], trezor.Type(req))
+	binary.BigEndian.PutUint32(payload[4:], uint32(len(data)))
+	copy(payload[8:], data)
+
+	// Stream all the chunks to the device
+	chunk := make([]byte, 64)
+	chunk[0] = 0x3f // Report ID magic number
+
+	for len(payload) > 0 {
+		// Construct the new message to stream, padding with zeroes if needed
+		if len(payload) > 63 {
+			copy(chunk[1:], payload[:63])
+			payload = payload[63:]
+		} else {
+			copy(chunk[1:], payload)
+			copy(chunk[1+len(payload):], make([]byte, 63-len(payload)))
+			payload = nil
+		}
+		// Send over to the device
+		w.log.Trace("Data chunk sent to the Trezor", "chunk", hexutil.Bytes(chunk))
+		if _, err := w.device.Write(chunk); err != nil {
+			return 0, err
+		}
+	}
+	// Stream the reply back from the wallet in 64 byte chunks
+	var (
+		kind  uint16
+		reply []byte
+	)
+	for {
+		// Read the next chunk from the Trezor wallet
+		if _, err := io.ReadFull(w.device, chunk); err != nil {
+			return 0, err
+		}
+		w.log.Trace("Data chunk received from the Trezor", "chunk", hexutil.Bytes(chunk))
+
+		// Make sure the transport header matches
+		if chunk[0] != 0x3f || (len(reply) == 0 && (chunk[1] != 0x23 || chunk[2] != 0x23)) {
+			return 0, errTrezorReplyInvalidHeader
+		}
+		// If it's the first chunk, retrieve the reply message type and total message length
+		var payload []byte
+
+		if len(reply) == 0 {
+			kind = binary.BigEndian.Uint16(chunk[3:5])
+			reply = make([]byte, 0, int(binary.BigEndian.Uint32(chunk[5:9])))
+			payload = chunk[9:]
+		} else {
+			payload = chunk[1:]
+		}
+		// Append to the reply and stop when filled up
+		if left := cap(reply) - len(reply); left > len(payload) {
+			reply = append(reply, payload...)
+		} else {
+			reply = append(reply, payload[:left]...)
+			break
+		}
+	}
+	// Try to parse the reply into the requested reply message
+	if kind == uint16(trezor.MessageType_MessageType_Failure) {
+		// Trezor returned a failure, extract and return the message
+		failure := new(trezor.Failure)
+		if err := proto.Unmarshal(reply, failure); err != nil {
+			return 0, err
+		}
+		return 0, errors.New("trezor: " + failure.GetMessage())
+	}
+	if kind == uint16(trezor.MessageType_MessageType_ButtonRequest) {
+		// Trezor is waiting for user confirmation, ack and wait for the next message
+		return w.trezorExchange(&trezor.ButtonAck{}, results...)
+	}
+	for i, res := range results {
+		if trezor.Type(res) == kind {
+			return i, proto.Unmarshal(reply, res)
+		}
+	}
+	expected := make([]string, len(results))
+	for i, res := range results {
+		expected[i] = trezor.Name(trezor.Type(res))
+	}
+	return 0, fmt.Errorf("trezor: expected reply types %s, got %s", expected, trezor.Name(kind))
+}
diff --git a/accounts/usbwallet/usbwallet.go b/accounts/usbwallet/usbwallet.go
deleted file mode 100644
index 938ab1e6a..000000000
--- a/accounts/usbwallet/usbwallet.go
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright 2017 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-// Package usbwallet implements support for USB hardware wallets.
-package usbwallet
-
-// deviceID is a combined vendor/product identifier to uniquely identify a USB
-// hardware device.
-type deviceID struct {
-	Vendor  uint16 // The Vendor identifer
-	Product uint16 // The Product identifier
-}
diff --git a/accounts/usbwallet/wallet.go b/accounts/usbwallet/wallet.go
new file mode 100644
index 000000000..8b3b5a522
--- /dev/null
+++ b/accounts/usbwallet/wallet.go
@@ -0,0 +1,562 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Package usbwallet implements support for USB hardware wallets.
+package usbwallet
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"math/big"
+	"sync"
+	"time"
+
+	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/accounts"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/karalabe/hid"
+)
+
+// Maximum time between wallet health checks to detect USB unplugs.
+const heartbeatCycle = time.Second
+
+// Minimum time to wait between self derivation attempts, even it the user is
+// requesting accounts like crazy.
+const selfDeriveThrottling = time.Second
+
+// driver defines the vendor specific functionality hardware wallets instances
+// must implement to allow using them with the wallet lifecycle management.
+type driver interface {
+	// Status returns a textual status to aid the user in the current state of the
+	// wallet. It also returns an error indicating any failure the wallet might have
+	// encountered.
+	Status() (string, error)
+
+	// Open initializes access to a wallet instance. The passphrase parameter may
+	// or may not be used by the implementation of a particular wallet instance.
+	Open(device io.ReadWriter, passphrase string) error
+
+	// Close releases any resources held by an open wallet instance.
+	Close() error
+
+	// Heartbeat performs a sanity check against the hardware wallet to see if it
+	// is still online and healthy.
+	Heartbeat() error
+
+	// Derive sends a derivation request to the USB device and returns the Ethereum
+	// address located on that path.
+	Derive(path accounts.DerivationPath) (common.Address, error)
+
+	// SignTx sends the transaction to the USB device and waits for the user to confirm
+	// or deny the transaction.
+	SignTx(path accounts.DerivationPath, tx *types.Transaction, chainID *big.Int) (common.Address, *types.Transaction, error)
+}
+
+// wallet represents the common functionality shared by all USB hardware
+// wallets to prevent reimplementing the same complex maintenance mechanisms
+// for different vendors.
+type wallet struct {
+	hub    *Hub          // USB hub scanning
+	driver driver        // Hardware implementation of the low level device operations
+	url    *accounts.URL // Textual URL uniquely identifying this wallet
+
+	info   hid.DeviceInfo // Known USB device infos about the wallet
+	device *hid.Device    // USB device advertising itself as a hardware wallet
+
+	accounts []accounts.Account                         // List of derive accounts pinned on the hardware wallet
+	paths    map[common.Address]accounts.DerivationPath // Known derivation paths for signing operations
+
+	deriveNextPath accounts.DerivationPath   // Next derivation path for account auto-discovery
+	deriveNextAddr common.Address            // Next derived account address for auto-discovery
+	deriveChain    ethereum.ChainStateReader // Blockchain state reader to discover used account with
+	deriveReq      chan chan struct{}        // Channel to request a self-derivation on
+	deriveQuit     chan chan error           // Channel to terminate the self-deriver with
+
+	healthQuit chan chan error
+
+	// Locking a hardware wallet is a bit special. Since hardware devices are lower
+	// performing, any communication with them might take a non negligible amount of
+	// time. Worse still, waiting for user confirmation can take arbitrarily long,
+	// but exclusive communication must be upheld during. Locking the entire wallet
+	// in the mean time however would stall any parts of the system that don't want
+	// to communicate, just read some state (e.g. list the accounts).
+	//
+	// As such, a hardware wallet needs two locks to function correctly. A state
+	// lock can be used to protect the wallet's software-side internal state, which
+	// must not be held exlusively during hardware communication. A communication
+	// lock can be used to achieve exclusive access to the device itself, this one
+	// however should allow "skipping" waiting for operations that might want to
+	// use the device, but can live without too (e.g. account self-derivation).
+	//
+	// Since we have two locks, it's important to know how to properly use them:
+	//   - Communication requires the `device` to not change, so obtaining the
+	//     commsLock should be done after having a stateLock.
+	//   - Communication must not disable read access to the wallet state, so it
+	//     must only ever hold a *read* lock to stateLock.
+	commsLock chan struct{} // Mutex (buf=1) for the USB comms without keeping the state locked
+	stateLock sync.RWMutex  // Protects read and write access to the wallet struct fields
+
+	log log.Logger // Contextual logger to tag the base with its id
+}
+
+// URL implements accounts.Wallet, returning the URL of the USB hardware device.
+func (w *wallet) URL() accounts.URL {
+	return *w.url // Immutable, no need for a lock
+}
+
+// Status implements accounts.Wallet, returning a custom status message from the
+// underlying vendor-specific hardware wallet implementation.
+func (w *wallet) Status() (string, error) {
+	w.stateLock.RLock() // No device communication, state lock is enough
+	defer w.stateLock.RUnlock()
+
+	status, failure := w.driver.Status()
+	if w.device == nil {
+		return "Closed", failure
+	}
+	return status, failure
+}
+
+// Open implements accounts.Wallet, attempting to open a USB connection to the
+// hardware wallet.
+func (w *wallet) Open(passphrase string) error {
+	w.stateLock.Lock() // State lock is enough since there's no connection yet at this point
+	defer w.stateLock.Unlock()
+
+	// If the device was already opened once, refuse to try again
+	if w.paths != nil {
+		return accounts.ErrWalletAlreadyOpen
+	}
+	// Make sure the actual device connection is done only once
+	if w.device == nil {
+		device, err := w.info.Open()
+		if err != nil {
+			return err
+		}
+		w.device = device
+		w.commsLock = make(chan struct{}, 1)
+		w.commsLock <- struct{}{} // Enable lock
+	}
+	// Delegate device initialization to the underlying driver
+	if err := w.driver.Open(w.device, passphrase); err != nil {
+		return err
+	}
+	// Connection successful, start life-cycle management
+	w.paths = make(map[common.Address]accounts.DerivationPath)
+
+	w.deriveReq = make(chan chan struct{})
+	w.deriveQuit = make(chan chan error)
+	w.healthQuit = make(chan chan error)
+
+	go w.heartbeat()
+	go w.selfDerive()
+
+	// Notify anyone listening for wallet events that a new device is accessible
+	go w.hub.updateFeed.Send(accounts.WalletEvent{Wallet: w, Kind: accounts.WalletOpened})
+
+	return nil
+}
+
+// heartbeat is a health check loop for the USB wallets to periodically verify
+// whether they are still present or if they malfunctioned.
+func (w *wallet) heartbeat() {
+	w.log.Debug("USB wallet health-check started")
+	defer w.log.Debug("USB wallet health-check stopped")
+
+	// Execute heartbeat checks until termination or error
+	var (
+		errc chan error
+		err  error
+	)
+	for errc == nil && err == nil {
+		// Wait until termination is requested or the heartbeat cycle arrives
+		select {
+		case errc = <-w.healthQuit:
+			// Termination requested
+			continue
+		case <-time.After(heartbeatCycle):
+			// Heartbeat time
+		}
+		// Execute a tiny data exchange to see responsiveness
+		w.stateLock.RLock()
+		if w.device == nil {
+			// Terminated while waiting for the lock
+			w.stateLock.RUnlock()
+			continue
+		}
+		<-w.commsLock // Don't lock state while resolving version
+		err = w.driver.Heartbeat()
+		w.commsLock <- struct{}{}
+		w.stateLock.RUnlock()
+
+		if err != nil {
+			w.stateLock.Lock() // Lock state to tear the wallet down
+			w.close()
+			w.stateLock.Unlock()
+		}
+		// Ignore non hardware related errors
+		err = nil
+	}
+	// In case of error, wait for termination
+	if err != nil {
+		w.log.Debug("USB wallet health-check failed", "err", err)
+		errc = <-w.healthQuit
+	}
+	errc <- err
+}
+
+// Close implements accounts.Wallet, closing the USB connection to the device.
+func (w *wallet) Close() error {
+	// Ensure the wallet was opened
+	w.stateLock.RLock()
+	hQuit, dQuit := w.healthQuit, w.deriveQuit
+	w.stateLock.RUnlock()
+
+	// Terminate the health checks
+	var herr error
+	if hQuit != nil {
+		errc := make(chan error)
+		hQuit <- errc
+		herr = <-errc // Save for later, we *must* close the USB
+	}
+	// Terminate the self-derivations
+	var derr error
+	if dQuit != nil {
+		errc := make(chan error)
+		dQuit <- errc
+		derr = <-errc // Save for later, we *must* close the USB
+	}
+	// Terminate the device connection
+	w.stateLock.Lock()
+	defer w.stateLock.Unlock()
+
+	w.healthQuit = nil
+	w.deriveQuit = nil
+	w.deriveReq = nil
+
+	if err := w.close(); err != nil {
+		return err
+	}
+	if herr != nil {
+		return herr
+	}
+	return derr
+}
+
+// close is the internal wallet closer that terminates the USB connection and
+// resets all the fields to their defaults.
+//
+// Note, close assumes the state lock is held!
+func (w *wallet) close() error {
+	// Allow duplicate closes, especially for health-check failures
+	if w.device == nil {
+		return nil
+	}
+	// Close the device, clear everything, then return
+	w.device.Close()
+	w.device = nil
+
+	w.accounts, w.paths = nil, nil
+	w.driver.Close()
+
+	return nil
+}
+
+// Accounts implements accounts.Wallet, returning the list of accounts pinned to
+// the USB hardware wallet. If self-derivation was enabled, the account list is
+// periodically expanded based on current chain state.
+func (w *wallet) Accounts() []accounts.Account {
+	// Attempt self-derivation if it's running
+	reqc := make(chan struct{}, 1)
+	select {
+	case w.deriveReq <- reqc:
+		// Self-derivation request accepted, wait for it
+		<-reqc
+	default:
+		// Self-derivation offline, throttled or busy, skip
+	}
+	// Return whatever account list we ended up with
+	w.stateLock.RLock()
+	defer w.stateLock.RUnlock()
+
+	cpy := make([]accounts.Account, len(w.accounts))
+	copy(cpy, w.accounts)
+	return cpy
+}
+
+// selfDerive is an account derivation loop that upon request attempts to find
+// new non-zero accounts.
+func (w *wallet) selfDerive() {
+	w.log.Debug("USB wallet self-derivation started")
+	defer w.log.Debug("USB wallet self-derivation stopped")
+
+	// Execute self-derivations until termination or error
+	var (
+		reqc chan struct{}
+		errc chan error
+		err  error
+	)
+	for errc == nil && err == nil {
+		// Wait until either derivation or termination is requested
+		select {
+		case errc = <-w.deriveQuit:
+			// Termination requested
+			continue
+		case reqc = <-w.deriveReq:
+			// Account discovery requested
+		}
+		// Derivation needs a chain and device access, skip if either unavailable
+		w.stateLock.RLock()
+		if w.device == nil || w.deriveChain == nil {
+			w.stateLock.RUnlock()
+			reqc <- struct{}{}
+			continue
+		}
+		select {
+		case <-w.commsLock:
+		default:
+			w.stateLock.RUnlock()
+			reqc <- struct{}{}
+			continue
+		}
+		// Device lock obtained, derive the next batch of accounts
+		var (
+			accs  []accounts.Account
+			paths []accounts.DerivationPath
+
+			nextAddr = w.deriveNextAddr
+			nextPath = w.deriveNextPath
+
+			context = context.Background()
+		)
+		for empty := false; !empty; {
+			// Retrieve the next derived Ethereum account
+			if nextAddr == (common.Address{}) {
+				if nextAddr, err = w.driver.Derive(nextPath); err != nil {
+					w.log.Warn("USB wallet account derivation failed", "err", err)
+					break
+				}
+			}
+			// Check the account's status against the current chain state
+			var (
+				balance *big.Int
+				nonce   uint64
+			)
+			balance, err = w.deriveChain.BalanceAt(context, nextAddr, nil)
+			if err != nil {
+				w.log.Warn("USB wallet balance retrieval failed", "err", err)
+				break
+			}
+			nonce, err = w.deriveChain.NonceAt(context, nextAddr, nil)
+			if err != nil {
+				w.log.Warn("USB wallet nonce retrieval failed", "err", err)
+				break
+			}
+			// If the next account is empty, stop self-derivation, but add it nonetheless
+			if balance.Sign() == 0 && nonce == 0 {
+				empty = true
+			}
+			// We've just self-derived a new account, start tracking it locally
+			path := make(accounts.DerivationPath, len(nextPath))
+			copy(path[:], nextPath[:])
+			paths = append(paths, path)
+
+			account := accounts.Account{
+				Address: nextAddr,
+				URL:     accounts.URL{Scheme: w.url.Scheme, Path: fmt.Sprintf("%s/%s", w.url.Path, path)},
+			}
+			accs = append(accs, account)
+
+			// Display a log message to the user for new (or previously empty accounts)
+			if _, known := w.paths[nextAddr]; !known || (!empty && nextAddr == w.deriveNextAddr) {
+				w.log.Info("USB wallet discovered new account", "address", nextAddr, "path", path, "balance", balance, "nonce", nonce)
+			}
+			// Fetch the next potential account
+			if !empty {
+				nextAddr = common.Address{}
+				nextPath[len(nextPath)-1]++
+			}
+		}
+		// Self derivation complete, release device lock
+		w.commsLock <- struct{}{}
+		w.stateLock.RUnlock()
+
+		// Insert any accounts successfully derived
+		w.stateLock.Lock()
+		for i := 0; i < len(accs); i++ {
+			if _, ok := w.paths[accs[i].Address]; !ok {
+				w.accounts = append(w.accounts, accs[i])
+				w.paths[accs[i].Address] = paths[i]
+			}
+		}
+		// Shift the self-derivation forward
+		// TODO(karalabe): don't overwrite changes from wallet.SelfDerive
+		w.deriveNextAddr = nextAddr
+		w.deriveNextPath = nextPath
+		w.stateLock.Unlock()
+
+		// Notify the user of termination and loop after a bit of time (to avoid trashing)
+		reqc <- struct{}{}
+		if err == nil {
+			select {
+			case errc = <-w.deriveQuit:
+				// Termination requested, abort
+			case <-time.After(selfDeriveThrottling):
+				// Waited enough, willing to self-derive again
+			}
+		}
+	}
+	// In case of error, wait for termination
+	if err != nil {
+		w.log.Debug("USB wallet self-derivation failed", "err", err)
+		errc = <-w.deriveQuit
+	}
+	errc <- err
+}
+
+// Contains implements accounts.Wallet, returning whether a particular account is
+// or is not pinned into this wallet instance. Although we could attempt to resolve
+// unpinned accounts, that would be an non-negligible hardware operation.
+func (w *wallet) Contains(account accounts.Account) bool {
+	w.stateLock.RLock()
+	defer w.stateLock.RUnlock()
+
+	_, exists := w.paths[account.Address]
+	return exists
+}
+
+// Derive implements accounts.Wallet, deriving a new account at the specific
+// derivation path. If pin is set to true, the account will be added to the list
+// of tracked accounts.
+func (w *wallet) Derive(path accounts.DerivationPath, pin bool) (accounts.Account, error) {
+	// Try to derive the actual account and update its URL if successful
+	w.stateLock.RLock() // Avoid device disappearing during derivation
+
+	if w.device == nil {
+		w.stateLock.RUnlock()
+		return accounts.Account{}, accounts.ErrWalletClosed
+	}
+	<-w.commsLock // Avoid concurrent hardware access
+	address, err := w.driver.Derive(path)
+	w.commsLock <- struct{}{}
+
+	w.stateLock.RUnlock()
+
+	// If an error occurred or no pinning was requested, return
+	if err != nil {
+		return accounts.Account{}, err
+	}
+	account := accounts.Account{
+		Address: address,
+		URL:     accounts.URL{Scheme: w.url.Scheme, Path: fmt.Sprintf("%s/%s", w.url.Path, path)},
+	}
+	if !pin {
+		return account, nil
+	}
+	// Pinning needs to modify the state
+	w.stateLock.Lock()
+	defer w.stateLock.Unlock()
+
+	if _, ok := w.paths[address]; !ok {
+		w.accounts = append(w.accounts, account)
+		w.paths[address] = path
+	}
+	return account, nil
+}
+
+// SelfDerive implements accounts.Wallet, trying to discover accounts that the
+// user used previously (based on the chain state), but ones that he/she did not
+// explicitly pin to the wallet manually. To avoid chain head monitoring, self
+// derivation only runs during account listing (and even then throttled).
+func (w *wallet) SelfDerive(base accounts.DerivationPath, chain ethereum.ChainStateReader) {
+	w.stateLock.Lock()
+	defer w.stateLock.Unlock()
+
+	w.deriveNextPath = make(accounts.DerivationPath, len(base))
+	copy(w.deriveNextPath[:], base[:])
+
+	w.deriveNextAddr = common.Address{}
+	w.deriveChain = chain
+}
+
+// SignHash implements accounts.Wallet, however signing arbitrary data is not
+// supported for hardware wallets, so this method will always return an error.
+func (w *wallet) SignHash(account accounts.Account, hash []byte) ([]byte, error) {
+	return nil, accounts.ErrNotSupported
+}
+
+// SignTx implements accounts.Wallet. It sends the transaction over to the Ledger
+// wallet to request a confirmation from the user. It returns either the signed
+// transaction or a failure if the user denied the transaction.
+//
+// Note, if the version of the Ethereum application running on the Ledger wallet is
+// too old to sign EIP-155 transactions, but such is requested nonetheless, an error
+// will be returned opposed to silently signing in Homestead mode.
+func (w *wallet) SignTx(account accounts.Account, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
+	w.stateLock.RLock() // Comms have own mutex, this is for the state fields
+	defer w.stateLock.RUnlock()
+
+	// If the wallet is closed, abort
+	if w.device == nil {
+		return nil, accounts.ErrWalletClosed
+	}
+	// Make sure the requested account is contained within
+	path, ok := w.paths[account.Address]
+	if !ok {
+		return nil, accounts.ErrUnknownAccount
+	}
+	// All infos gathered and metadata checks out, request signing
+	<-w.commsLock
+	defer func() { w.commsLock <- struct{}{} }()
+
+	// Ensure the device isn't screwed with while user confirmation is pending
+	// TODO(karalabe): remove if hotplug lands on Windows
+	w.hub.commsLock.Lock()
+	w.hub.commsPend++
+	w.hub.commsLock.Unlock()
+
+	defer func() {
+		w.hub.commsLock.Lock()
+		w.hub.commsPend--
+		w.hub.commsLock.Unlock()
+	}()
+	// Sign the transaction and verify the sender to avoid hardware fault surprises
+	sender, signed, err := w.driver.SignTx(path, tx, chainID)
+	if err != nil {
+		return nil, err
+	}
+	if sender != account.Address {
+		return nil, fmt.Errorf("signer mismatch: expected %s, got %s", account.Address.Hex(), sender.Hex())
+	}
+	return signed, nil
+}
+
+// SignHashWithPassphrase implements accounts.Wallet, however signing arbitrary
+// data is not supported for Ledger wallets, so this method will always return
+// an error.
+func (w *wallet) SignHashWithPassphrase(account accounts.Account, passphrase string, hash []byte) ([]byte, error) {
+	return w.SignHash(account, hash)
+}
+
+// SignTxWithPassphrase implements accounts.Wallet, attempting to sign the given
+// transaction with the given account using passphrase as extra authentication.
+// Since USB wallets don't rely on passphrases, these are silently ignored.
+func (w *wallet) SignTxWithPassphrase(account accounts.Account, passphrase string, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {
+	return w.SignTx(account, tx, chainID)
+}
diff --git a/cmd/geth/main.go b/cmd/geth/main.go
index 66958e34d..8166c9ce8 100644
--- a/cmd/geth/main.go
+++ b/cmd/geth/main.go
@@ -239,24 +239,30 @@ func startNode(ctx *cli.Context, stack *node.Node) {
 		}
 		stateReader := ethclient.NewClient(rpcClient)
 
-		// Open and self derive any wallets already attached
+		// Open any wallets already attached
 		for _, wallet := range stack.AccountManager().Wallets() {
 			if err := wallet.Open(""); err != nil {
 				log.Warn("Failed to open wallet", "url", wallet.URL(), "err", err)
-			} else {
-				wallet.SelfDerive(accounts.DefaultBaseDerivationPath, stateReader)
 			}
 		}
 		// Listen for wallet event till termination
 		for event := range events {
-			if event.Arrive {
+			switch event.Kind {
+			case accounts.WalletArrived:
 				if err := event.Wallet.Open(""); err != nil {
 					log.Warn("New wallet appeared, failed to open", "url", event.Wallet.URL(), "err", err)
+				}
+			case accounts.WalletOpened:
+				status, _ := event.Wallet.Status()
+				log.Info("New wallet appeared", "url", event.Wallet.URL(), "status", status)
+
+				if event.Wallet.URL().Scheme == "ledger" {
+					event.Wallet.SelfDerive(accounts.DefaultLedgerBaseDerivationPath, stateReader)
 				} else {
-					log.Info("New wallet appeared", "url", event.Wallet.URL(), "status", event.Wallet.Status())
 					event.Wallet.SelfDerive(accounts.DefaultBaseDerivationPath, stateReader)
 				}
-			} else {
+
+			case accounts.WalletDropped:
 				log.Info("Old wallet dropped", "url", event.Wallet.URL())
 				event.Wallet.Close()
 			}
diff --git a/console/bridge.go b/console/bridge.go
index 75be68188..b28cc438e 100644
--- a/console/bridge.go
+++ b/console/bridge.go
@@ -23,6 +23,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/ethereum/go-ethereum/accounts/usbwallet"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/rpc"
 	"github.com/robertkrimen/otto"
@@ -83,6 +84,49 @@ func (b *bridge) NewAccount(call otto.FunctionCall) (response otto.Value) {
 	return ret
 }
 
+// OpenWallet is a wrapper around personal.openWallet which can interpret and
+// react to certain error messages, such as the Trezor PIN matrix request.
+func (b *bridge) OpenWallet(call otto.FunctionCall) (response otto.Value) {
+	// Make sure we have an wallet specified to open
+	if !call.Argument(0).IsString() {
+		throwJSException("first argument must be the wallet URL to open")
+	}
+	wallet := call.Argument(0)
+
+	var passwd otto.Value
+	if call.Argument(1).IsUndefined() || call.Argument(1).IsNull() {
+		passwd, _ = otto.ToValue("")
+	} else {
+		passwd = call.Argument(1)
+	}
+	// Open the wallet and return if successful in itself
+	val, err := call.Otto.Call("jeth.openWallet", nil, wallet, passwd)
+	if err == nil {
+		return val
+	}
+	// Wallet open failed, report error unless it's a PIN entry
+	if !strings.HasSuffix(err.Error(), usbwallet.ErrTrezorPINNeeded.Error()) {
+		throwJSException(err.Error())
+	}
+	// Trezor PIN matrix input requested, display the matrix to the user and fetch the data
+	fmt.Fprintf(b.printer, "Look at the device for number positions\n\n")
+	fmt.Fprintf(b.printer, "7 | 8 | 9\n")
+	fmt.Fprintf(b.printer, "--+---+--\n")
+	fmt.Fprintf(b.printer, "4 | 5 | 6\n")
+	fmt.Fprintf(b.printer, "--+---+--\n")
+	fmt.Fprintf(b.printer, "1 | 2 | 3\n\n")
+
+	if input, err := b.prompter.PromptPassword("Please enter current PIN: "); err != nil {
+		throwJSException(err.Error())
+	} else {
+		passwd, _ = otto.ToValue(input)
+	}
+	if val, err = call.Otto.Call("jeth.openWallet", nil, wallet, passwd); err != nil {
+		throwJSException(err.Error())
+	}
+	return val
+}
+
 // UnlockAccount is a wrapper around the personal.unlockAccount RPC method that
 // uses a non-echoing password prompt to acquire the passphrase and executes the
 // original RPC method (saved in jeth.unlockAccount) with it to actually execute
diff --git a/console/console.go b/console/console.go
index 389d52858..3cd2ad34b 100644
--- a/console/console.go
+++ b/console/console.go
@@ -160,10 +160,15 @@ func (c *Console) init(preload []string) error {
 		if err != nil {
 			return err
 		}
-		// Override the unlockAccount, newAccount and sign methods since these require user interaction.
-		// Assign these method in the Console the original web3 callbacks. These will be called by the jeth.*
-		// methods after they got the password from the user and send the original web3 request to the backend.
+		// Override the openWallet, unlockAccount, newAccount and sign methods since
+		// these require user interaction. Assign these method in the Console the
+		// original web3 callbacks. These will be called by the jeth.* methods after
+		// they got the password from the user and send the original web3 request to
+		// the backend.
 		if obj := personal.Object(); obj != nil { // make sure the personal api is enabled over the interface
+			if _, err = c.jsre.Run(`jeth.openWallet = personal.openWallet;`); err != nil {
+				return fmt.Errorf("personal.openWallet: %v", err)
+			}
 			if _, err = c.jsre.Run(`jeth.unlockAccount = personal.unlockAccount;`); err != nil {
 				return fmt.Errorf("personal.unlockAccount: %v", err)
 			}
@@ -173,6 +178,7 @@ func (c *Console) init(preload []string) error {
 			if _, err = c.jsre.Run(`jeth.sign = personal.sign;`); err != nil {
 				return fmt.Errorf("personal.sign: %v", err)
 			}
+			obj.Set("openWallet", bridge.OpenWallet)
 			obj.Set("unlockAccount", bridge.UnlockAccount)
 			obj.Set("newAccount", bridge.NewAccount)
 			obj.Set("sign", bridge.Sign)
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 7874b7101..c3924b93a 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -230,22 +230,45 @@ func (s *PrivateAccountAPI) ListAccounts() []common.Address {
 type rawWallet struct {
 	URL      string             `json:"url"`
 	Status   string             `json:"status"`
-	Accounts []accounts.Account `json:"accounts"`
+	Failure  string             `json:"failure,omitempty"`
+	Accounts []accounts.Account `json:"accounts,omitempty"`
 }
 
 // ListWallets will return a list of wallets this node manages.
 func (s *PrivateAccountAPI) ListWallets() []rawWallet {
 	wallets := make([]rawWallet, 0) // return [] instead of nil if empty
 	for _, wallet := range s.am.Wallets() {
-		wallets = append(wallets, rawWallet{
+		status, failure := wallet.Status()
+
+		raw := rawWallet{
 			URL:      wallet.URL().String(),
-			Status:   wallet.Status(),
+			Status:   status,
 			Accounts: wallet.Accounts(),
-		})
+		}
+		if failure != nil {
+			raw.Failure = failure.Error()
+		}
+		wallets = append(wallets, raw)
 	}
 	return wallets
 }
 
+// OpenWallet initiates a hardware wallet opening procedure, establishing a USB
+// connection and attempting to authenticate via the provided passphrase. Note,
+// the method may return an extra challenge requiring a second open (e.g. the
+// Trezor PIN matrix challenge).
+func (s *PrivateAccountAPI) OpenWallet(url string, passphrase *string) error {
+	wallet, err := s.am.Wallet(url)
+	if err != nil {
+		return err
+	}
+	pass := ""
+	if passphrase != nil {
+		pass = *passphrase
+	}
+	return wallet.Open(pass)
+}
+
 // DeriveAccount requests a HD wallet to derive a new account, optionally pinning
 // it for later reuse.
 func (s *PrivateAccountAPI) DeriveAccount(url string, path string, pin *bool) (accounts.Account, error) {
diff --git a/internal/web3ext/web3ext.go b/internal/web3ext/web3ext.go
index 44fabd6ab..bf1db8819 100644
--- a/internal/web3ext/web3ext.go
+++ b/internal/web3ext/web3ext.go
@@ -493,6 +493,11 @@ web3._extend({
 			params: 2
 		}),
 		new web3._extend.Method({
+			name: 'openWallet',
+			call: 'personal_openWallet',
+			params: 2
+		}),
+		new web3._extend.Method({
 			name: 'deriveAccount',
 			call: 'personal_deriveAccount',
 			params: 3
diff --git a/node/config.go b/node/config.go
index e9693277a..b9b5e5b92 100644
--- a/node/config.go
+++ b/node/config.go
@@ -393,11 +393,18 @@ func makeAccountManager(conf *Config) (*accounts.Manager, string, error) {
 		keystore.NewKeyStore(keydir, scryptN, scryptP),
 	}
 	if !conf.NoUSB {
+		// Start a USB hub for Ledger hardware wallets
 		if ledgerhub, err := usbwallet.NewLedgerHub(); err != nil {
 			log.Warn(fmt.Sprintf("Failed to start Ledger hub, disabling: %v", err))
 		} else {
 			backends = append(backends, ledgerhub)
 		}
+		// Start a USB hub for Trezor hardware wallets
+		if trezorhub, err := usbwallet.NewTrezorHub(); err != nil {
+			log.Warn(fmt.Sprintf("Failed to start Trezor hub, disabling: %v", err))
+		} else {
+			backends = append(backends, trezorhub)
+		}
 	}
 	return accounts.NewManager(backends...), ephemeral, nil
 }
diff --git a/vendor/github.com/golang/protobuf/LICENSE b/vendor/github.com/golang/protobuf/LICENSE
new file mode 100644
index 000000000..1b1b1921e
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/LICENSE
@@ -0,0 +1,31 @@
+Go support for Protocol Buffers - Google's data interchange format
+
+Copyright 2010 The Go Authors.  All rights reserved.
+https://github.com/golang/protobuf
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+    * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
diff --git a/vendor/github.com/golang/protobuf/proto/Makefile b/vendor/github.com/golang/protobuf/proto/Makefile
new file mode 100644
index 000000000..e2e0651a9
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/Makefile
@@ -0,0 +1,43 @@
+# Go support for Protocol Buffers - Google's data interchange format
+#
+# Copyright 2010 The Go Authors.  All rights reserved.
+# https://github.com/golang/protobuf
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+install:
+	go install
+
+test: install generate-test-pbs
+	go test
+
+
+generate-test-pbs:
+	make install
+	make -C testdata
+	protoc --go_out=Mtestdata/test.proto=github.com/golang/protobuf/proto/testdata,Mgoogle/protobuf/any.proto=github.com/golang/protobuf/ptypes/any:. proto3_proto/proto3.proto
+	make
diff --git a/vendor/github.com/golang/protobuf/proto/clone.go b/vendor/github.com/golang/protobuf/proto/clone.go
new file mode 100644
index 000000000..e392575b3
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/clone.go
@@ -0,0 +1,229 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2011 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Protocol buffer deep copy and merge.
+// TODO: RawMessage.
+
+package proto
+
+import (
+	"log"
+	"reflect"
+	"strings"
+)
+
+// Clone returns a deep copy of a protocol buffer.
+func Clone(pb Message) Message {
+	in := reflect.ValueOf(pb)
+	if in.IsNil() {
+		return pb
+	}
+
+	out := reflect.New(in.Type().Elem())
+	// out is empty so a merge is a deep copy.
+	mergeStruct(out.Elem(), in.Elem())
+	return out.Interface().(Message)
+}
+
+// Merge merges src into dst.
+// Required and optional fields that are set in src will be set to that value in dst.
+// Elements of repeated fields will be appended.
+// Merge panics if src and dst are not the same type, or if dst is nil.
+func Merge(dst, src Message) {
+	in := reflect.ValueOf(src)
+	out := reflect.ValueOf(dst)
+	if out.IsNil() {
+		panic("proto: nil destination")
+	}
+	if in.Type() != out.Type() {
+		// Explicit test prior to mergeStruct so that mistyped nils will fail
+		panic("proto: type mismatch")
+	}
+	if in.IsNil() {
+		// Merging nil into non-nil is a quiet no-op
+		return
+	}
+	mergeStruct(out.Elem(), in.Elem())
+}
+
+func mergeStruct(out, in reflect.Value) {
+	sprop := GetProperties(in.Type())
+	for i := 0; i < in.NumField(); i++ {
+		f := in.Type().Field(i)
+		if strings.HasPrefix(f.Name, "XXX_") {
+			continue
+		}
+		mergeAny(out.Field(i), in.Field(i), false, sprop.Prop[i])
+	}
+
+	if emIn, ok := extendable(in.Addr().Interface()); ok {
+		emOut, _ := extendable(out.Addr().Interface())
+		mIn, muIn := emIn.extensionsRead()
+		if mIn != nil {
+			mOut := emOut.extensionsWrite()
+			muIn.Lock()
+			mergeExtension(mOut, mIn)
+			muIn.Unlock()
+		}
+	}
+
+	uf := in.FieldByName("XXX_unrecognized")
+	if !uf.IsValid() {
+		return
+	}
+	uin := uf.Bytes()
+	if len(uin) > 0 {
+		out.FieldByName("XXX_unrecognized").SetBytes(append([]byte(nil), uin...))
+	}
+}
+
+// mergeAny performs a merge between two values of the same type.
+// viaPtr indicates whether the values were indirected through a pointer (implying proto2).
+// prop is set if this is a struct field (it may be nil).
+func mergeAny(out, in reflect.Value, viaPtr bool, prop *Properties) {
+	if in.Type() == protoMessageType {
+		if !in.IsNil() {
+			if out.IsNil() {
+				out.Set(reflect.ValueOf(Clone(in.Interface().(Message))))
+			} else {
+				Merge(out.Interface().(Message), in.Interface().(Message))
+			}
+		}
+		return
+	}
+	switch in.Kind() {
+	case reflect.Bool, reflect.Float32, reflect.Float64, reflect.Int32, reflect.Int64,
+		reflect.String, reflect.Uint32, reflect.Uint64:
+		if !viaPtr && isProto3Zero(in) {
+			return
+		}
+		out.Set(in)
+	case reflect.Interface:
+		// Probably a oneof field; copy non-nil values.
+		if in.IsNil() {
+			return
+		}
+		// Allocate destination if it is not set, or set to a different type.
+		// Otherwise we will merge as normal.
+		if out.IsNil() || out.Elem().Type() != in.Elem().Type() {
+			out.Set(reflect.New(in.Elem().Elem().Type())) // interface -> *T -> T -> new(T)
+		}
+		mergeAny(out.Elem(), in.Elem(), false, nil)
+	case reflect.Map:
+		if in.Len() == 0 {
+			return
+		}
+		if out.IsNil() {
+			out.Set(reflect.MakeMap(in.Type()))
+		}
+		// For maps with value types of *T or []byte we need to deep copy each value.
+		elemKind := in.Type().Elem().Kind()
+		for _, key := range in.MapKeys() {
+			var val reflect.Value
+			switch elemKind {
+			case reflect.Ptr:
+				val = reflect.New(in.Type().Elem().Elem())
+				mergeAny(val, in.MapIndex(key), false, nil)
+			case reflect.Slice:
+				val = in.MapIndex(key)
+				val = reflect.ValueOf(append([]byte{}, val.Bytes()...))
+			default:
+				val = in.MapIndex(key)
+			}
+			out.SetMapIndex(key, val)
+		}
+	case reflect.Ptr:
+		if in.IsNil() {
+			return
+		}
+		if out.IsNil() {
+			out.Set(reflect.New(in.Elem().Type()))
+		}
+		mergeAny(out.Elem(), in.Elem(), true, nil)
+	case reflect.Slice:
+		if in.IsNil() {
+			return
+		}
+		if in.Type().Elem().Kind() == reflect.Uint8 {
+			// []byte is a scalar bytes field, not a repeated field.
+
+			// Edge case: if this is in a proto3 message, a zero length
+			// bytes field is considered the zero value, and should not
+			// be merged.
+			if prop != nil && prop.proto3 && in.Len() == 0 {
+				return
+			}
+
+			// Make a deep copy.
+			// Append to []byte{} instead of []byte(nil) so that we never end up
+			// with a nil result.
+			out.SetBytes(append([]byte{}, in.Bytes()...))
+			return
+		}
+		n := in.Len()
+		if out.IsNil() {
+			out.Set(reflect.MakeSlice(in.Type(), 0, n))
+		}
+		switch in.Type().Elem().Kind() {
+		case reflect.Bool, reflect.Float32, reflect.Float64, reflect.Int32, reflect.Int64,
+			reflect.String, reflect.Uint32, reflect.Uint64:
+			out.Set(reflect.AppendSlice(out, in))
+		default:
+			for i := 0; i < n; i++ {
+				x := reflect.Indirect(reflect.New(in.Type().Elem()))
+				mergeAny(x, in.Index(i), false, nil)
+				out.Set(reflect.Append(out, x))
+			}
+		}
+	case reflect.Struct:
+		mergeStruct(out, in)
+	default:
+		// unknown type, so not a protocol buffer
+		log.Printf("proto: don't know how to copy %v", in)
+	}
+}
+
+func mergeExtension(out, in map[int32]Extension) {
+	for extNum, eIn := range in {
+		eOut := Extension{desc: eIn.desc}
+		if eIn.value != nil {
+			v := reflect.New(reflect.TypeOf(eIn.value)).Elem()
+			mergeAny(v, reflect.ValueOf(eIn.value), false, nil)
+			eOut.value = v.Interface()
+		}
+		if eIn.enc != nil {
+			eOut.enc = make([]byte, len(eIn.enc))
+			copy(eOut.enc, eIn.enc)
+		}
+
+		out[extNum] = eOut
+	}
+}
diff --git a/vendor/github.com/golang/protobuf/proto/decode.go b/vendor/github.com/golang/protobuf/proto/decode.go
new file mode 100644
index 000000000..aa207298f
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/decode.go
@@ -0,0 +1,970 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2010 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package proto
+
+/*
+ * Routines for decoding protocol buffer data to construct in-memory representations.
+ */
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"reflect"
+)
+
+// errOverflow is returned when an integer is too large to be represented.
+var errOverflow = errors.New("proto: integer overflow")
+
+// ErrInternalBadWireType is returned by generated code when an incorrect
+// wire type is encountered. It does not get returned to user code.
+var ErrInternalBadWireType = errors.New("proto: internal error: bad wiretype for oneof")
+
+// The fundamental decoders that interpret bytes on the wire.
+// Those that take integer types all return uint64 and are
+// therefore of type valueDecoder.
+
+// DecodeVarint reads a varint-encoded integer from the slice.
+// It returns the integer and the number of bytes consumed, or
+// zero if there is not enough.
+// This is the format for the
+// int32, int64, uint32, uint64, bool, and enum
+// protocol buffer types.
+func DecodeVarint(buf []byte) (x uint64, n int) {
+	for shift := uint(0); shift < 64; shift += 7 {
+		if n >= len(buf) {
+			return 0, 0
+		}
+		b := uint64(buf[n])
+		n++
+		x |= (b & 0x7F) << shift
+		if (b & 0x80) == 0 {
+			return x, n
+		}
+	}
+
+	// The number is too large to represent in a 64-bit value.
+	return 0, 0
+}
+
+func (p *Buffer) decodeVarintSlow() (x uint64, err error) {
+	i := p.index
+	l := len(p.buf)
+
+	for shift := uint(0); shift < 64; shift += 7 {
+		if i >= l {
+			err = io.ErrUnexpectedEOF
+			return
+		}
+		b := p.buf[i]
+		i++
+		x |= (uint64(b) & 0x7F) << shift
+		if b < 0x80 {
+			p.index = i
+			return
+		}
+	}
+
+	// The number is too large to represent in a 64-bit value.
+	err = errOverflow
+	return
+}
+
+// DecodeVarint reads a varint-encoded integer from the Buffer.
+// This is the format for the
+// int32, int64, uint32, uint64, bool, and enum
+// protocol buffer types.
+func (p *Buffer) DecodeVarint() (x uint64, err error) {
+	i := p.index
+	buf := p.buf
+
+	if i >= len(buf) {
+		return 0, io.ErrUnexpectedEOF
+	} else if buf[i] < 0x80 {
+		p.index++
+		return uint64(buf[i]), nil
+	} else if len(buf)-i < 10 {
+		return p.decodeVarintSlow()
+	}
+
+	var b uint64
+	// we already checked the first byte
+	x = uint64(buf[i]) - 0x80
+	i++
+
+	b = uint64(buf[i])
+	i++
+	x += b << 7
+	if b&0x80 == 0 {
+		goto done
+	}
+	x -= 0x80 << 7
+
+	b = uint64(buf[i])
+	i++
+	x += b << 14
+	if b&0x80 == 0 {
+		goto done
+	}
+	x -= 0x80 << 14
+
+	b = uint64(buf[i])
+	i++
+	x += b << 21
+	if b&0x80 == 0 {
+		goto done
+	}
+	x -= 0x80 << 21
+
+	b = uint64(buf[i])
+	i++
+	x += b << 28
+	if b&0x80 == 0 {
+		goto done
+	}
+	x -= 0x80 << 28
+
+	b = uint64(buf[i])
+	i++
+	x += b << 35
+	if b&0x80 == 0 {
+		goto done
+	}
+	x -= 0x80 << 35
+
+	b = uint64(buf[i])
+	i++
+	x += b << 42
+	if b&0x80 == 0 {
+		goto done
+	}
+	x -= 0x80 << 42
+
+	b = uint64(buf[i])
+	i++
+	x += b << 49
+	if b&0x80 == 0 {
+		goto done
+	}
+	x -= 0x80 << 49
+
+	b = uint64(buf[i])
+	i++
+	x += b << 56
+	if b&0x80 == 0 {
+		goto done
+	}
+	x -= 0x80 << 56
+
+	b = uint64(buf[i])
+	i++
+	x += b << 63
+	if b&0x80 == 0 {
+		goto done
+	}
+	// x -= 0x80 << 63 // Always zero.
+
+	return 0, errOverflow
+
+done:
+	p.index = i
+	return x, nil
+}
+
+// DecodeFixed64 reads a 64-bit integer from the Buffer.
+// This is the format for the
+// fixed64, sfixed64, and double protocol buffer types.
+func (p *Buffer) DecodeFixed64() (x uint64, err error) {
+	// x, err already 0
+	i := p.index + 8
+	if i < 0 || i > len(p.buf) {
+		err = io.ErrUnexpectedEOF
+		return
+	}
+	p.index = i
+
+	x = uint64(p.buf[i-8])
+	x |= uint64(p.buf[i-7]) << 8
+	x |= uint64(p.buf[i-6]) << 16
+	x |= uint64(p.buf[i-5]) << 24
+	x |= uint64(p.buf[i-4]) << 32
+	x |= uint64(p.buf[i-3]) << 40
+	x |= uint64(p.buf[i-2]) << 48
+	x |= uint64(p.buf[i-1]) << 56
+	return
+}
+
+// DecodeFixed32 reads a 32-bit integer from the Buffer.
+// This is the format for the
+// fixed32, sfixed32, and float protocol buffer types.
+func (p *Buffer) DecodeFixed32() (x uint64, err error) {
+	// x, err already 0
+	i := p.index + 4
+	if i < 0 || i > len(p.buf) {
+		err = io.ErrUnexpectedEOF
+		return
+	}
+	p.index = i
+
+	x = uint64(p.buf[i-4])
+	x |= uint64(p.buf[i-3]) << 8
+	x |= uint64(p.buf[i-2]) << 16
+	x |= uint64(p.buf[i-1]) << 24
+	return
+}
+
+// DecodeZigzag64 reads a zigzag-encoded 64-bit integer
+// from the Buffer.
+// This is the format used for the sint64 protocol buffer type.
+func (p *Buffer) DecodeZigzag64() (x uint64, err error) {
+	x, err = p.DecodeVarint()
+	if err != nil {
+		return
+	}
+	x = (x >> 1) ^ uint64((int64(x&1)<<63)>>63)
+	return
+}
+
+// DecodeZigzag32 reads a zigzag-encoded 32-bit integer
+// from  the Buffer.
+// This is the format used for the sint32 protocol buffer type.
+func (p *Buffer) DecodeZigzag32() (x uint64, err error) {
+	x, err = p.DecodeVarint()
+	if err != nil {
+		return
+	}
+	x = uint64((uint32(x) >> 1) ^ uint32((int32(x&1)<<31)>>31))
+	return
+}
+
+// These are not ValueDecoders: they produce an array of bytes or a string.
+// bytes, embedded messages
+
+// DecodeRawBytes reads a count-delimited byte buffer from the Buffer.
+// This is the format used for the bytes protocol buffer
+// type and for embedded messages.
+func (p *Buffer) DecodeRawBytes(alloc bool) (buf []byte, err error) {
+	n, err := p.DecodeVarint()
+	if err != nil {
+		return nil, err
+	}
+
+	nb := int(n)
+	if nb < 0 {
+		return nil, fmt.Errorf("proto: bad byte length %d", nb)
+	}
+	end := p.index + nb
+	if end < p.index || end > len(p.buf) {
+		return nil, io.ErrUnexpectedEOF
+	}
+
+	if !alloc {
+		// todo: check if can get more uses of alloc=false
+		buf = p.buf[p.index:end]
+		p.index += nb
+		return
+	}
+
+	buf = make([]byte, nb)
+	copy(buf, p.buf[p.index:])
+	p.index += nb
+	return
+}
+
+// DecodeStringBytes reads an encoded string from the Buffer.
+// This is the format used for the proto2 string type.
+func (p *Buffer) DecodeStringBytes() (s string, err error) {
+	buf, err := p.DecodeRawBytes(false)
+	if err != nil {
+		return
+	}
+	return string(buf), nil
+}
+
+// Skip the next item in the buffer. Its wire type is decoded and presented as an argument.
+// If the protocol buffer has extensions, and the field matches, add it as an extension.
+// Otherwise, if the XXX_unrecognized field exists, append the skipped data there.
+func (o *Buffer) skipAndSave(t reflect.Type, tag, wire int, base structPointer, unrecField field) error {
+	oi := o.index
+
+	err := o.skip(t, tag, wire)
+	if err != nil {
+		return err
+	}
+
+	if !unrecField.IsValid() {
+		return nil
+	}
+
+	ptr := structPointer_Bytes(base, unrecField)
+
+	// Add the skipped field to struct field
+	obuf := o.buf
+
+	o.buf = *ptr
+	o.EncodeVarint(uint64(tag<<3 | wire))
+	*ptr = append(o.buf, obuf[oi:o.index]...)
+
+	o.buf = obuf
+
+	return nil
+}
+
+// Skip the next item in the buffer. Its wire type is decoded and presented as an argument.
+func (o *Buffer) skip(t reflect.Type, tag, wire int) error {
+
+	var u uint64
+	var err error
+
+	switch wire {
+	case WireVarint:
+		_, err = o.DecodeVarint()
+	case WireFixed64:
+		_, err = o.DecodeFixed64()
+	case WireBytes:
+		_, err = o.DecodeRawBytes(false)
+	case WireFixed32:
+		_, err = o.DecodeFixed32()
+	case WireStartGroup:
+		for {
+			u, err = o.DecodeVarint()
+			if err != nil {
+				break
+			}
+			fwire := int(u & 0x7)
+			if fwire == WireEndGroup {
+				break
+			}
+			ftag := int(u >> 3)
+			err = o.skip(t, ftag, fwire)
+			if err != nil {
+				break
+			}
+		}
+	default:
+		err = fmt.Errorf("proto: can't skip unknown wire type %d for %s", wire, t)
+	}
+	return err
+}
+
+// Unmarshaler is the interface representing objects that can
+// unmarshal themselves.  The method should reset the receiver before
+// decoding starts.  The argument points to data that may be
+// overwritten, so implementations should not keep references to the
+// buffer.
+type Unmarshaler interface {
+	Unmarshal([]byte) error
+}
+
+// Unmarshal parses the protocol buffer representation in buf and places the
+// decoded result in pb.  If the struct underlying pb does not match
+// the data in buf, the results can be unpredictable.
+//
+// Unmarshal resets pb before starting to unmarshal, so any
+// existing data in pb is always removed. Use UnmarshalMerge
+// to preserve and append to existing data.
+func Unmarshal(buf []byte, pb Message) error {
+	pb.Reset()
+	return UnmarshalMerge(buf, pb)
+}
+
+// UnmarshalMerge parses the protocol buffer representation in buf and
+// writes the decoded result to pb.  If the struct underlying pb does not match
+// the data in buf, the results can be unpredictable.
+//
+// UnmarshalMerge merges into existing data in pb.
+// Most code should use Unmarshal instead.
+func UnmarshalMerge(buf []byte, pb Message) error {
+	// If the object can unmarshal itself, let it.
+	if u, ok := pb.(Unmarshaler); ok {
+		return u.Unmarshal(buf)
+	}
+	return NewBuffer(buf).Unmarshal(pb)
+}
+
+// DecodeMessage reads a count-delimited message from the Buffer.
+func (p *Buffer) DecodeMessage(pb Message) error {
+	enc, err := p.DecodeRawBytes(false)
+	if err != nil {
+		return err
+	}
+	return NewBuffer(enc).Unmarshal(pb)
+}
+
+// DecodeGroup reads a tag-delimited group from the Buffer.
+func (p *Buffer) DecodeGroup(pb Message) error {
+	typ, base, err := getbase(pb)
+	if err != nil {
+		return err
+	}
+	return p.unmarshalType(typ.Elem(), GetProperties(typ.Elem()), true, base)
+}
+
+// Unmarshal parses the protocol buffer representation in the
+// Buffer and places the decoded result in pb.  If the struct
+// underlying pb does not match the data in the buffer, the results can be
+// unpredictable.
+//
+// Unlike proto.Unmarshal, this does not reset pb before starting to unmarshal.
+func (p *Buffer) Unmarshal(pb Message) error {
+	// If the object can unmarshal itself, let it.
+	if u, ok := pb.(Unmarshaler); ok {
+		err := u.Unmarshal(p.buf[p.index:])
+		p.index = len(p.buf)
+		return err
+	}
+
+	typ, base, err := getbase(pb)
+	if err != nil {
+		return err
+	}
+
+	err = p.unmarshalType(typ.Elem(), GetProperties(typ.Elem()), false, base)
+
+	if collectStats {
+		stats.Decode++
+	}
+
+	return err
+}
+
+// unmarshalType does the work of unmarshaling a structure.
+func (o *Buffer) unmarshalType(st reflect.Type, prop *StructProperties, is_group bool, base structPointer) error {
+	var state errorState
+	required, reqFields := prop.reqCount, uint64(0)
+
+	var err error
+	for err == nil && o.index < len(o.buf) {
+		oi := o.index
+		var u uint64
+		u, err = o.DecodeVarint()
+		if err != nil {
+			break
+		}
+		wire := int(u & 0x7)
+		if wire == WireEndGroup {
+			if is_group {
+				if required > 0 {
+					// Not enough information to determine the exact field.
+					// (See below.)
+					return &RequiredNotSetError{"{Unknown}"}
+				}
+				return nil // input is satisfied
+			}
+			return fmt.Errorf("proto: %s: wiretype end group for non-group", st)
+		}
+		tag := int(u >> 3)
+		if tag <= 0 {
+			return fmt.Errorf("proto: %s: illegal tag %d (wire type %d)", st, tag, wire)
+		}
+		fieldnum, ok := prop.decoderTags.get(tag)
+		if !ok {
+			// Maybe it's an extension?
+			if prop.extendable {
+				if e, _ := extendable(structPointer_Interface(base, st)); isExtensionField(e, int32(tag)) {
+					if err = o.skip(st, tag, wire); err == nil {
+						extmap := e.extensionsWrite()
+						ext := extmap[int32(tag)] // may be missing
+						ext.enc = append(ext.enc, o.buf[oi:o.index]...)
+						extmap[int32(tag)] = ext
+					}
+					continue
+				}
+			}
+			// Maybe it's a oneof?
+			if prop.oneofUnmarshaler != nil {
+				m := structPointer_Interface(base, st).(Message)
+				// First return value indicates whether tag is a oneof field.
+				ok, err = prop.oneofUnmarshaler(m, tag, wire, o)
+				if err == ErrInternalBadWireType {
+					// Map the error to something more descriptive.
+					// Do the formatting here to save generated code space.
+					err = fmt.Errorf("bad wiretype for oneof field in %T", m)
+				}
+				if ok {
+					continue
+				}
+			}
+			err = o.skipAndSave(st, tag, wire, base, prop.unrecField)
+			continue
+		}
+		p := prop.Prop[fieldnum]
+
+		if p.dec == nil {
+			fmt.Fprintf(os.Stderr, "proto: no protobuf decoder for %s.%s\n", st, st.Field(fieldnum).Name)
+			continue
+		}
+		dec := p.dec
+		if wire != WireStartGroup && wire != p.WireType {
+			if wire == WireBytes && p.packedDec != nil {
+				// a packable field
+				dec = p.packedDec
+			} else {
+				err = fmt.Errorf("proto: bad wiretype for field %s.%s: got wiretype %d, want %d", st, st.Field(fieldnum).Name, wire, p.WireType)
+				continue
+			}
+		}
+		decErr := dec(o, p, base)
+		if decErr != nil && !state.shouldContinue(decErr, p) {
+			err = decErr
+		}
+		if err == nil && p.Required {
+			// Successfully decoded a required field.
+			if tag <= 64 {
+				// use bitmap for fields 1-64 to catch field reuse.
+				var mask uint64 = 1 << uint64(tag-1)
+				if reqFields&mask == 0 {
+					// new required field
+					reqFields |= mask
+					required--
+				}
+			} else {
+				// This is imprecise. It can be fooled by a required field
+				// with a tag > 64 that is encoded twice; that's very rare.
+				// A fully correct implementation would require allocating
+				// a data structure, which we would like to avoid.
+				required--
+			}
+		}
+	}
+	if err == nil {
+		if is_group {
+			return io.ErrUnexpectedEOF
+		}
+		if state.err != nil {
+			return state.err
+		}
+		if required > 0 {
+			// Not enough information to determine the exact field. If we use extra
+			// CPU, we could determine the field only if the missing required field
+			// has a tag <= 64 and we check reqFields.
+			return &RequiredNotSetError{"{Unknown}"}
+		}
+	}
+	return err
+}
+
+// Individual type decoders
+// For each,
+//	u is the decoded value,
+//	v is a pointer to the field (pointer) in the struct
+
+// Sizes of the pools to allocate inside the Buffer.
+// The goal is modest amortization and allocation
+// on at least 16-byte boundaries.
+const (
+	boolPoolSize   = 16
+	uint32PoolSize = 8
+	uint64PoolSize = 4
+)
+
+// Decode a bool.
+func (o *Buffer) dec_bool(p *Properties, base structPointer) error {
+	u, err := p.valDec(o)
+	if err != nil {
+		return err
+	}
+	if len(o.bools) == 0 {
+		o.bools = make([]bool, boolPoolSize)
+	}
+	o.bools[0] = u != 0
+	*structPointer_Bool(base, p.field) = &o.bools[0]
+	o.bools = o.bools[1:]
+	return nil
+}
+
+func (o *Buffer) dec_proto3_bool(p *Properties, base structPointer) error {
+	u, err := p.valDec(o)
+	if err != nil {
+		return err
+	}
+	*structPointer_BoolVal(base, p.field) = u != 0
+	return nil
+}
+
+// Decode an int32.
+func (o *Buffer) dec_int32(p *Properties, base structPointer) error {
+	u, err := p.valDec(o)
+	if err != nil {
+		return err
+	}
+	word32_Set(structPointer_Word32(base, p.field), o, uint32(u))
+	return nil
+}
+
+func (o *Buffer) dec_proto3_int32(p *Properties, base structPointer) error {
+	u, err := p.valDec(o)
+	if err != nil {
+		return err
+	}
+	word32Val_Set(structPointer_Word32Val(base, p.field), uint32(u))
+	return nil
+}
+
+// Decode an int64.
+func (o *Buffer) dec_int64(p *Properties, base structPointer) error {
+	u, err := p.valDec(o)
+	if err != nil {
+		return err
+	}
+	word64_Set(structPointer_Word64(base, p.field), o, u)
+	return nil
+}
+
+func (o *Buffer) dec_proto3_int64(p *Properties, base structPointer) error {
+	u, err := p.valDec(o)
+	if err != nil {
+		return err
+	}
+	word64Val_Set(structPointer_Word64Val(base, p.field), o, u)
+	return nil
+}
+
+// Decode a string.
+func (o *Buffer) dec_string(p *Properties, base structPointer) error {
+	s, err := o.DecodeStringBytes()
+	if err != nil {
+		return err
+	}
+	*structPointer_String(base, p.field) = &s
+	return nil
+}
+
+func (o *Buffer) dec_proto3_string(p *Properties, base structPointer) error {
+	s, err := o.DecodeStringBytes()
+	if err != nil {
+		return err
+	}
+	*structPointer_StringVal(base, p.field) = s
+	return nil
+}
+
+// Decode a slice of bytes ([]byte).
+func (o *Buffer) dec_slice_byte(p *Properties, base structPointer) error {
+	b, err := o.DecodeRawBytes(true)
+	if err != nil {
+		return err
+	}
+	*structPointer_Bytes(base, p.field) = b
+	return nil
+}
+
+// Decode a slice of bools ([]bool).
+func (o *Buffer) dec_slice_bool(p *Properties, base structPointer) error {
+	u, err := p.valDec(o)
+	if err != nil {
+		return err
+	}
+	v := structPointer_BoolSlice(base, p.field)
+	*v = append(*v, u != 0)
+	return nil
+}
+
+// Decode a slice of bools ([]bool) in packed format.
+func (o *Buffer) dec_slice_packed_bool(p *Properties, base structPointer) error {
+	v := structPointer_BoolSlice(base, p.field)
+
+	nn, err := o.DecodeVarint()
+	if err != nil {
+		return err
+	}
+	nb := int(nn) // number of bytes of encoded bools
+	fin := o.index + nb
+	if fin < o.index {
+		return errOverflow
+	}
+
+	y := *v
+	for o.index < fin {
+		u, err := p.valDec(o)
+		if err != nil {
+			return err
+		}
+		y = append(y, u != 0)
+	}
+
+	*v = y
+	return nil
+}
+
+// Decode a slice of int32s ([]int32).
+func (o *Buffer) dec_slice_int32(p *Properties, base structPointer) error {
+	u, err := p.valDec(o)
+	if err != nil {
+		return err
+	}
+	structPointer_Word32Slice(base, p.field).Append(uint32(u))
+	return nil
+}
+
+// Decode a slice of int32s ([]int32) in packed format.
+func (o *Buffer) dec_slice_packed_int32(p *Properties, base structPointer) error {
+	v := structPointer_Word32Slice(base, p.field)
+
+	nn, err := o.DecodeVarint()
+	if err != nil {
+		return err
+	}
+	nb := int(nn) // number of bytes of encoded int32s
+
+	fin := o.index + nb
+	if fin < o.index {
+		return errOverflow
+	}
+	for o.index < fin {
+		u, err := p.valDec(o)
+		if err != nil {
+			return err
+		}
+		v.Append(uint32(u))
+	}
+	return nil
+}
+
+// Decode a slice of int64s ([]int64).
+func (o *Buffer) dec_slice_int64(p *Properties, base structPointer) error {
+	u, err := p.valDec(o)
+	if err != nil {
+		return err
+	}
+
+	structPointer_Word64Slice(base, p.field).Append(u)
+	return nil
+}
+
+// Decode a slice of int64s ([]int64) in packed format.
+func (o *Buffer) dec_slice_packed_int64(p *Properties, base structPointer) error {
+	v := structPointer_Word64Slice(base, p.field)
+
+	nn, err := o.DecodeVarint()
+	if err != nil {
+		return err
+	}
+	nb := int(nn) // number of bytes of encoded int64s
+
+	fin := o.index + nb
+	if fin < o.index {
+		return errOverflow
+	}
+	for o.index < fin {
+		u, err := p.valDec(o)
+		if err != nil {
+			return err
+		}
+		v.Append(u)
+	}
+	return nil
+}
+
+// Decode a slice of strings ([]string).
+func (o *Buffer) dec_slice_string(p *Properties, base structPointer) error {
+	s, err := o.DecodeStringBytes()
+	if err != nil {
+		return err
+	}
+	v := structPointer_StringSlice(base, p.field)
+	*v = append(*v, s)
+	return nil
+}
+
+// Decode a slice of slice of bytes ([][]byte).
+func (o *Buffer) dec_slice_slice_byte(p *Properties, base structPointer) error {
+	b, err := o.DecodeRawBytes(true)
+	if err != nil {
+		return err
+	}
+	v := structPointer_BytesSlice(base, p.field)
+	*v = append(*v, b)
+	return nil
+}
+
+// Decode a map field.
+func (o *Buffer) dec_new_map(p *Properties, base structPointer) error {
+	raw, err := o.DecodeRawBytes(false)
+	if err != nil {
+		return err
+	}
+	oi := o.index       // index at the end of this map entry
+	o.index -= len(raw) // move buffer back to start of map entry
+
+	mptr := structPointer_NewAt(base, p.field, p.mtype) // *map[K]V
+	if mptr.Elem().IsNil() {
+		mptr.Elem().Set(reflect.MakeMap(mptr.Type().Elem()))
+	}
+	v := mptr.Elem() // map[K]V
+
+	// Prepare addressable doubly-indirect placeholders for the key and value types.
+	// See enc_new_map for why.
+	keyptr := reflect.New(reflect.PtrTo(p.mtype.Key())).Elem() // addressable *K
+	keybase := toStructPointer(keyptr.Addr())                  // **K
+
+	var valbase structPointer
+	var valptr reflect.Value
+	switch p.mtype.Elem().Kind() {
+	case reflect.Slice:
+		// []byte
+		var dummy []byte
+		valptr = reflect.ValueOf(&dummy)  // *[]byte
+		valbase = toStructPointer(valptr) // *[]byte
+	case reflect.Ptr:
+		// message; valptr is **Msg; need to allocate the intermediate pointer
+		valptr = reflect.New(reflect.PtrTo(p.mtype.Elem())).Elem() // addressable *V
+		valptr.Set(reflect.New(valptr.Type().Elem()))
+		valbase = toStructPointer(valptr)
+	default:
+		// everything else
+		valptr = reflect.New(reflect.PtrTo(p.mtype.Elem())).Elem() // addressable *V
+		valbase = toStructPointer(valptr.Addr())                   // **V
+	}
+
+	// Decode.
+	// This parses a restricted wire format, namely the encoding of a message
+	// with two fields. See enc_new_map for the format.
+	for o.index < oi {
+		// tagcode for key and value properties are always a single byte
+		// because they have tags 1 and 2.
+		tagcode := o.buf[o.index]
+		o.index++
+		switch tagcode {
+		case p.mkeyprop.tagcode[0]:
+			if err := p.mkeyprop.dec(o, p.mkeyprop, keybase); err != nil {
+				return err
+			}
+		case p.mvalprop.tagcode[0]:
+			if err := p.mvalprop.dec(o, p.mvalprop, valbase); err != nil {
+				return err
+			}
+		default:
+			// TODO: Should we silently skip this instead?
+			return fmt.Errorf("proto: bad map data tag %d", raw[0])
+		}
+	}
+	keyelem, valelem := keyptr.Elem(), valptr.Elem()
+	if !keyelem.IsValid() {
+		keyelem = reflect.Zero(p.mtype.Key())
+	}
+	if !valelem.IsValid() {
+		valelem = reflect.Zero(p.mtype.Elem())
+	}
+
+	v.SetMapIndex(keyelem, valelem)
+	return nil
+}
+
+// Decode a group.
+func (o *Buffer) dec_struct_group(p *Properties, base structPointer) error {
+	bas := structPointer_GetStructPointer(base, p.field)
+	if structPointer_IsNil(bas) {
+		// allocate new nested message
+		bas = toStructPointer(reflect.New(p.stype))
+		structPointer_SetStructPointer(base, p.field, bas)
+	}
+	return o.unmarshalType(p.stype, p.sprop, true, bas)
+}
+
+// Decode an embedded message.
+func (o *Buffer) dec_struct_message(p *Properties, base structPointer) (err error) {
+	raw, e := o.DecodeRawBytes(false)
+	if e != nil {
+		return e
+	}
+
+	bas := structPointer_GetStructPointer(base, p.field)
+	if structPointer_IsNil(bas) {
+		// allocate new nested message
+		bas = toStructPointer(reflect.New(p.stype))
+		structPointer_SetStructPointer(base, p.field, bas)
+	}
+
+	// If the object can unmarshal itself, let it.
+	if p.isUnmarshaler {
+		iv := structPointer_Interface(bas, p.stype)
+		return iv.(Unmarshaler).Unmarshal(raw)
+	}
+
+	obuf := o.buf
+	oi := o.index
+	o.buf = raw
+	o.index = 0
+
+	err = o.unmarshalType(p.stype, p.sprop, false, bas)
+	o.buf = obuf
+	o.index = oi
+
+	return err
+}
+
+// Decode a slice of embedded messages.
+func (o *Buffer) dec_slice_struct_message(p *Properties, base structPointer) error {
+	return o.dec_slice_struct(p, false, base)
+}
+
+// Decode a slice of embedded groups.
+func (o *Buffer) dec_slice_struct_group(p *Properties, base structPointer) error {
+	return o.dec_slice_struct(p, true, base)
+}
+
+// Decode a slice of structs ([]*struct).
+func (o *Buffer) dec_slice_struct(p *Properties, is_group bool, base structPointer) error {
+	v := reflect.New(p.stype)
+	bas := toStructPointer(v)
+	structPointer_StructPointerSlice(base, p.field).Append(bas)
+
+	if is_group {
+		err := o.unmarshalType(p.stype, p.sprop, is_group, bas)
+		return err
+	}
+
+	raw, err := o.DecodeRawBytes(false)
+	if err != nil {
+		return err
+	}
+
+	// If the object can unmarshal itself, let it.
+	if p.isUnmarshaler {
+		iv := v.Interface()
+		return iv.(Unmarshaler).Unmarshal(raw)
+	}
+
+	obuf := o.buf
+	oi := o.index
+	o.buf = raw
+	o.index = 0
+
+	err = o.unmarshalType(p.stype, p.sprop, is_group, bas)
+
+	o.buf = obuf
+	o.index = oi
+
+	return err
+}
diff --git a/vendor/github.com/golang/protobuf/proto/encode.go b/vendor/github.com/golang/protobuf/proto/encode.go
new file mode 100644
index 000000000..8b84d1b22
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/encode.go
@@ -0,0 +1,1362 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2010 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package proto
+
+/*
+ * Routines for encoding data into the wire format for protocol buffers.
+ */
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"sort"
+)
+
+// RequiredNotSetError is the error returned if Marshal is called with
+// a protocol buffer struct whose required fields have not
+// all been initialized. It is also the error returned if Unmarshal is
+// called with an encoded protocol buffer that does not include all the
+// required fields.
+//
+// When printed, RequiredNotSetError reports the first unset required field in a
+// message. If the field cannot be precisely determined, it is reported as
+// "{Unknown}".
+type RequiredNotSetError struct {
+	field string
+}
+
+func (e *RequiredNotSetError) Error() string {
+	return fmt.Sprintf("proto: required field %q not set", e.field)
+}
+
+var (
+	// errRepeatedHasNil is the error returned if Marshal is called with
+	// a struct with a repeated field containing a nil element.
+	errRepeatedHasNil = errors.New("proto: repeated field has nil element")
+
+	// errOneofHasNil is the error returned if Marshal is called with
+	// a struct with a oneof field containing a nil element.
+	errOneofHasNil = errors.New("proto: oneof field has nil value")
+
+	// ErrNil is the error returned if Marshal is called with nil.
+	ErrNil = errors.New("proto: Marshal called with nil")
+
+	// ErrTooLarge is the error returned if Marshal is called with a
+	// message that encodes to >2GB.
+	ErrTooLarge = errors.New("proto: message encodes to over 2 GB")
+)
+
+// The fundamental encoders that put bytes on the wire.
+// Those that take integer types all accept uint64 and are
+// therefore of type valueEncoder.
+
+const maxVarintBytes = 10 // maximum length of a varint
+
+// maxMarshalSize is the largest allowed size of an encoded protobuf,
+// since C++ and Java use signed int32s for the size.
+const maxMarshalSize = 1<<31 - 1
+
+// EncodeVarint returns the varint encoding of x.
+// This is the format for the
+// int32, int64, uint32, uint64, bool, and enum
+// protocol buffer types.
+// Not used by the package itself, but helpful to clients
+// wishing to use the same encoding.
+func EncodeVarint(x uint64) []byte {
+	var buf [maxVarintBytes]byte
+	var n int
+	for n = 0; x > 127; n++ {
+		buf[n] = 0x80 | uint8(x&0x7F)
+		x >>= 7
+	}
+	buf[n] = uint8(x)
+	n++
+	return buf[0:n]
+}
+
+// EncodeVarint writes a varint-encoded integer to the Buffer.
+// This is the format for the
+// int32, int64, uint32, uint64, bool, and enum
+// protocol buffer types.
+func (p *Buffer) EncodeVarint(x uint64) error {
+	for x >= 1<<7 {
+		p.buf = append(p.buf, uint8(x&0x7f|0x80))
+		x >>= 7
+	}
+	p.buf = append(p.buf, uint8(x))
+	return nil
+}
+
+// SizeVarint returns the varint encoding size of an integer.
+func SizeVarint(x uint64) int {
+	return sizeVarint(x)
+}
+
+func sizeVarint(x uint64) (n int) {
+	for {
+		n++
+		x >>= 7
+		if x == 0 {
+			break
+		}
+	}
+	return n
+}
+
+// EncodeFixed64 writes a 64-bit integer to the Buffer.
+// This is the format for the
+// fixed64, sfixed64, and double protocol buffer types.
+func (p *Buffer) EncodeFixed64(x uint64) error {
+	p.buf = append(p.buf,
+		uint8(x),
+		uint8(x>>8),
+		uint8(x>>16),
+		uint8(x>>24),
+		uint8(x>>32),
+		uint8(x>>40),
+		uint8(x>>48),
+		uint8(x>>56))
+	return nil
+}
+
+func sizeFixed64(x uint64) int {
+	return 8
+}
+
+// EncodeFixed32 writes a 32-bit integer to the Buffer.
+// This is the format for the
+// fixed32, sfixed32, and float protocol buffer types.
+func (p *Buffer) EncodeFixed32(x uint64) error {
+	p.buf = append(p.buf,
+		uint8(x),
+		uint8(x>>8),
+		uint8(x>>16),
+		uint8(x>>24))
+	return nil
+}
+
+func sizeFixed32(x uint64) int {
+	return 4
+}
+
+// EncodeZigzag64 writes a zigzag-encoded 64-bit integer
+// to the Buffer.
+// This is the format used for the sint64 protocol buffer type.
+func (p *Buffer) EncodeZigzag64(x uint64) error {
+	// use signed number to get arithmetic right shift.
+	return p.EncodeVarint((x << 1) ^ uint64((int64(x) >> 63)))
+}
+
+func sizeZigzag64(x uint64) int {
+	return sizeVarint((x << 1) ^ uint64((int64(x) >> 63)))
+}
+
+// EncodeZigzag32 writes a zigzag-encoded 32-bit integer
+// to the Buffer.
+// This is the format used for the sint32 protocol buffer type.
+func (p *Buffer) EncodeZigzag32(x uint64) error {
+	// use signed number to get arithmetic right shift.
+	return p.EncodeVarint(uint64((uint32(x) << 1) ^ uint32((int32(x) >> 31))))
+}
+
+func sizeZigzag32(x uint64) int {
+	return sizeVarint(uint64((uint32(x) << 1) ^ uint32((int32(x) >> 31))))
+}
+
+// EncodeRawBytes writes a count-delimited byte buffer to the Buffer.
+// This is the format used for the bytes protocol buffer
+// type and for embedded messages.
+func (p *Buffer) EncodeRawBytes(b []byte) error {
+	p.EncodeVarint(uint64(len(b)))
+	p.buf = append(p.buf, b...)
+	return nil
+}
+
+func sizeRawBytes(b []byte) int {
+	return sizeVarint(uint64(len(b))) +
+		len(b)
+}
+
+// EncodeStringBytes writes an encoded string to the Buffer.
+// This is the format used for the proto2 string type.
+func (p *Buffer) EncodeStringBytes(s string) error {
+	p.EncodeVarint(uint64(len(s)))
+	p.buf = append(p.buf, s...)
+	return nil
+}
+
+func sizeStringBytes(s string) int {
+	return sizeVarint(uint64(len(s))) +
+		len(s)
+}
+
+// Marshaler is the interface representing objects that can marshal themselves.
+type Marshaler interface {
+	Marshal() ([]byte, error)
+}
+
+// Marshal takes the protocol buffer
+// and encodes it into the wire format, returning the data.
+func Marshal(pb Message) ([]byte, error) {
+	// Can the object marshal itself?
+	if m, ok := pb.(Marshaler); ok {
+		return m.Marshal()
+	}
+	p := NewBuffer(nil)
+	err := p.Marshal(pb)
+	if p.buf == nil && err == nil {
+		// Return a non-nil slice on success.
+		return []byte{}, nil
+	}
+	return p.buf, err
+}
+
+// EncodeMessage writes the protocol buffer to the Buffer,
+// prefixed by a varint-encoded length.
+func (p *Buffer) EncodeMessage(pb Message) error {
+	t, base, err := getbase(pb)
+	if structPointer_IsNil(base) {
+		return ErrNil
+	}
+	if err == nil {
+		var state errorState
+		err = p.enc_len_struct(GetProperties(t.Elem()), base, &state)
+	}
+	return err
+}
+
+// Marshal takes the protocol buffer
+// and encodes it into the wire format, writing the result to the
+// Buffer.
+func (p *Buffer) Marshal(pb Message) error {
+	// Can the object marshal itself?
+	if m, ok := pb.(Marshaler); ok {
+		data, err := m.Marshal()
+		p.buf = append(p.buf, data...)
+		return err
+	}
+
+	t, base, err := getbase(pb)
+	if structPointer_IsNil(base) {
+		return ErrNil
+	}
+	if err == nil {
+		err = p.enc_struct(GetProperties(t.Elem()), base)
+	}
+
+	if collectStats {
+		(stats).Encode++ // Parens are to work around a goimports bug.
+	}
+
+	if len(p.buf) > maxMarshalSize {
+		return ErrTooLarge
+	}
+	return err
+}
+
+// Size returns the encoded size of a protocol buffer.
+func Size(pb Message) (n int) {
+	// Can the object marshal itself?  If so, Size is slow.
+	// TODO: add Size to Marshaler, or add a Sizer interface.
+	if m, ok := pb.(Marshaler); ok {
+		b, _ := m.Marshal()
+		return len(b)
+	}
+
+	t, base, err := getbase(pb)
+	if structPointer_IsNil(base) {
+		return 0
+	}
+	if err == nil {
+		n = size_struct(GetProperties(t.Elem()), base)
+	}
+
+	if collectStats {
+		(stats).Size++ // Parens are to work around a goimports bug.
+	}
+
+	return
+}
+
+// Individual type encoders.
+
+// Encode a bool.
+func (o *Buffer) enc_bool(p *Properties, base structPointer) error {
+	v := *structPointer_Bool(base, p.field)
+	if v == nil {
+		return ErrNil
+	}
+	x := 0
+	if *v {
+		x = 1
+	}
+	o.buf = append(o.buf, p.tagcode...)
+	p.valEnc(o, uint64(x))
+	return nil
+}
+
+func (o *Buffer) enc_proto3_bool(p *Properties, base structPointer) error {
+	v := *structPointer_BoolVal(base, p.field)
+	if !v {
+		return ErrNil
+	}
+	o.buf = append(o.buf, p.tagcode...)
+	p.valEnc(o, 1)
+	return nil
+}
+
+func size_bool(p *Properties, base structPointer) int {
+	v := *structPointer_Bool(base, p.field)
+	if v == nil {
+		return 0
+	}
+	return len(p.tagcode) + 1 // each bool takes exactly one byte
+}
+
+func size_proto3_bool(p *Properties, base structPointer) int {
+	v := *structPointer_BoolVal(base, p.field)
+	if !v && !p.oneof {
+		return 0
+	}
+	return len(p.tagcode) + 1 // each bool takes exactly one byte
+}
+
+// Encode an int32.
+func (o *Buffer) enc_int32(p *Properties, base structPointer) error {
+	v := structPointer_Word32(base, p.field)
+	if word32_IsNil(v) {
+		return ErrNil
+	}
+	x := int32(word32_Get(v)) // permit sign extension to use full 64-bit range
+	o.buf = append(o.buf, p.tagcode...)
+	p.valEnc(o, uint64(x))
+	return nil
+}
+
+func (o *Buffer) enc_proto3_int32(p *Properties, base structPointer) error {
+	v := structPointer_Word32Val(base, p.field)
+	x := int32(word32Val_Get(v)) // permit sign extension to use full 64-bit range
+	if x == 0 {
+		return ErrNil
+	}
+	o.buf = append(o.buf, p.tagcode...)
+	p.valEnc(o, uint64(x))
+	return nil
+}
+
+func size_int32(p *Properties, base structPointer) (n int) {
+	v := structPointer_Word32(base, p.field)
+	if word32_IsNil(v) {
+		return 0
+	}
+	x := int32(word32_Get(v)) // permit sign extension to use full 64-bit range
+	n += len(p.tagcode)
+	n += p.valSize(uint64(x))
+	return
+}
+
+func size_proto3_int32(p *Properties, base structPointer) (n int) {
+	v := structPointer_Word32Val(base, p.field)
+	x := int32(word32Val_Get(v)) // permit sign extension to use full 64-bit range
+	if x == 0 && !p.oneof {
+		return 0
+	}
+	n += len(p.tagcode)
+	n += p.valSize(uint64(x))
+	return
+}
+
+// Encode a uint32.
+// Exactly the same as int32, except for no sign extension.
+func (o *Buffer) enc_uint32(p *Properties, base structPointer) error {
+	v := structPointer_Word32(base, p.field)
+	if word32_IsNil(v) {
+		return ErrNil
+	}
+	x := word32_Get(v)
+	o.buf = append(o.buf, p.tagcode...)
+	p.valEnc(o, uint64(x))
+	return nil
+}
+
+func (o *Buffer) enc_proto3_uint32(p *Properties, base structPointer) error {
+	v := structPointer_Word32Val(base, p.field)
+	x := word32Val_Get(v)
+	if x == 0 {
+		return ErrNil
+	}
+	o.buf = append(o.buf, p.tagcode...)
+	p.valEnc(o, uint64(x))
+	return nil
+}
+
+func size_uint32(p *Properties, base structPointer) (n int) {
+	v := structPointer_Word32(base, p.field)
+	if word32_IsNil(v) {
+		return 0
+	}
+	x := word32_Get(v)
+	n += len(p.tagcode)
+	n += p.valSize(uint64(x))
+	return
+}
+
+func size_proto3_uint32(p *Properties, base structPointer) (n int) {
+	v := structPointer_Word32Val(base, p.field)
+	x := word32Val_Get(v)
+	if x == 0 && !p.oneof {
+		return 0
+	}
+	n += len(p.tagcode)
+	n += p.valSize(uint64(x))
+	return
+}
+
+// Encode an int64.
+func (o *Buffer) enc_int64(p *Properties, base structPointer) error {
+	v := structPointer_Word64(base, p.field)
+	if word64_IsNil(v) {
+		return ErrNil
+	}
+	x := word64_Get(v)
+	o.buf = append(o.buf, p.tagcode...)
+	p.valEnc(o, x)
+	return nil
+}
+
+func (o *Buffer) enc_proto3_int64(p *Properties, base structPointer) error {
+	v := structPointer_Word64Val(base, p.field)
+	x := word64Val_Get(v)
+	if x == 0 {
+		return ErrNil
+	}
+	o.buf = append(o.buf, p.tagcode...)
+	p.valEnc(o, x)
+	return nil
+}
+
+func size_int64(p *Properties, base structPointer) (n int) {
+	v := structPointer_Word64(base, p.field)
+	if word64_IsNil(v) {
+		return 0
+	}
+	x := word64_Get(v)
+	n += len(p.tagcode)
+	n += p.valSize(x)
+	return
+}
+
+func size_proto3_int64(p *Properties, base structPointer) (n int) {
+	v := structPointer_Word64Val(base, p.field)
+	x := word64Val_Get(v)
+	if x == 0 && !p.oneof {
+		return 0
+	}
+	n += len(p.tagcode)
+	n += p.valSize(x)
+	return
+}
+
+// Encode a string.
+func (o *Buffer) enc_string(p *Properties, base structPointer) error {
+	v := *structPointer_String(base, p.field)
+	if v == nil {
+		return ErrNil
+	}
+	x := *v
+	o.buf = append(o.buf, p.tagcode...)
+	o.EncodeStringBytes(x)
+	return nil
+}
+
+func (o *Buffer) enc_proto3_string(p *Properties, base structPointer) error {
+	v := *structPointer_StringVal(base, p.field)
+	if v == "" {
+		return ErrNil
+	}
+	o.buf = append(o.buf, p.tagcode...)
+	o.EncodeStringBytes(v)
+	return nil
+}
+
+func size_string(p *Properties, base structPointer) (n int) {
+	v := *structPointer_String(base, p.field)
+	if v == nil {
+		return 0
+	}
+	x := *v
+	n += len(p.tagcode)
+	n += sizeStringBytes(x)
+	return
+}
+
+func size_proto3_string(p *Properties, base structPointer) (n int) {
+	v := *structPointer_StringVal(base, p.field)
+	if v == "" && !p.oneof {
+		return 0
+	}
+	n += len(p.tagcode)
+	n += sizeStringBytes(v)
+	return
+}
+
+// All protocol buffer fields are nillable, but be careful.
+func isNil(v reflect.Value) bool {
+	switch v.Kind() {
+	case reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
+		return v.IsNil()
+	}
+	return false
+}
+
+// Encode a message struct.
+func (o *Buffer) enc_struct_message(p *Properties, base structPointer) error {
+	var state errorState
+	structp := structPointer_GetStructPointer(base, p.field)
+	if structPointer_IsNil(structp) {
+		return ErrNil
+	}
+
+	// Can the object marshal itself?
+	if p.isMarshaler {
+		m := structPointer_Interface(structp, p.stype).(Marshaler)
+		data, err := m.Marshal()
+		if err != nil && !state.shouldContinue(err, nil) {
+			return err
+		}
+		o.buf = append(o.buf, p.tagcode...)
+		o.EncodeRawBytes(data)
+		return state.err
+	}
+
+	o.buf = append(o.buf, p.tagcode...)
+	return o.enc_len_struct(p.sprop, structp, &state)
+}
+
+func size_struct_message(p *Properties, base structPointer) int {
+	structp := structPointer_GetStructPointer(base, p.field)
+	if structPointer_IsNil(structp) {
+		return 0
+	}
+
+	// Can the object marshal itself?
+	if p.isMarshaler {
+		m := structPointer_Interface(structp, p.stype).(Marshaler)
+		data, _ := m.Marshal()
+		n0 := len(p.tagcode)
+		n1 := sizeRawBytes(data)
+		return n0 + n1
+	}
+
+	n0 := len(p.tagcode)
+	n1 := size_struct(p.sprop, structp)
+	n2 := sizeVarint(uint64(n1)) // size of encoded length
+	return n0 + n1 + n2
+}
+
+// Encode a group struct.
+func (o *Buffer) enc_struct_group(p *Properties, base structPointer) error {
+	var state errorState
+	b := structPointer_GetStructPointer(base, p.field)
+	if structPointer_IsNil(b) {
+		return ErrNil
+	}
+
+	o.EncodeVarint(uint64((p.Tag << 3) | WireStartGroup))
+	err := o.enc_struct(p.sprop, b)
+	if err != nil && !state.shouldContinue(err, nil) {
+		return err
+	}
+	o.EncodeVarint(uint64((p.Tag << 3) | WireEndGroup))
+	return state.err
+}
+
+func size_struct_group(p *Properties, base structPointer) (n int) {
+	b := structPointer_GetStructPointer(base, p.field)
+	if structPointer_IsNil(b) {
+		return 0
+	}
+
+	n += sizeVarint(uint64((p.Tag << 3) | WireStartGroup))
+	n += size_struct(p.sprop, b)
+	n += sizeVarint(uint64((p.Tag << 3) | WireEndGroup))
+	return
+}
+
+// Encode a slice of bools ([]bool).
+func (o *Buffer) enc_slice_bool(p *Properties, base structPointer) error {
+	s := *structPointer_BoolSlice(base, p.field)
+	l := len(s)
+	if l == 0 {
+		return ErrNil
+	}
+	for _, x := range s {
+		o.buf = append(o.buf, p.tagcode...)
+		v := uint64(0)
+		if x {
+			v = 1
+		}
+		p.valEnc(o, v)
+	}
+	return nil
+}
+
+func size_slice_bool(p *Properties, base structPointer) int {
+	s := *structPointer_BoolSlice(base, p.field)
+	l := len(s)
+	if l == 0 {
+		return 0
+	}
+	return l * (len(p.tagcode) + 1) // each bool takes exactly one byte
+}
+
+// Encode a slice of bools ([]bool) in packed format.
+func (o *Buffer) enc_slice_packed_bool(p *Properties, base structPointer) error {
+	s := *structPointer_BoolSlice(base, p.field)
+	l := len(s)
+	if l == 0 {
+		return ErrNil
+	}
+	o.buf = append(o.buf, p.tagcode...)
+	o.EncodeVarint(uint64(l)) // each bool takes exactly one byte
+	for _, x := range s {
+		v := uint64(0)
+		if x {
+			v = 1
+		}
+		p.valEnc(o, v)
+	}
+	return nil
+}
+
+func size_slice_packed_bool(p *Properties, base structPointer) (n int) {
+	s := *structPointer_BoolSlice(base, p.field)
+	l := len(s)
+	if l == 0 {
+		return 0
+	}
+	n += len(p.tagcode)
+	n += sizeVarint(uint64(l))
+	n += l // each bool takes exactly one byte
+	return
+}
+
+// Encode a slice of bytes ([]byte).
+func (o *Buffer) enc_slice_byte(p *Properties, base structPointer) error {
+	s := *structPointer_Bytes(base, p.field)
+	if s == nil {
+		return ErrNil
+	}
+	o.buf = append(o.buf, p.tagcode...)
+	o.EncodeRawBytes(s)
+	return nil
+}
+
+func (o *Buffer) enc_proto3_slice_byte(p *Properties, base structPointer) error {
+	s := *structPointer_Bytes(base, p.field)
+	if len(s) == 0 {
+		return ErrNil
+	}
+	o.buf = append(o.buf, p.tagcode...)
+	o.EncodeRawBytes(s)
+	return nil
+}
+
+func size_slice_byte(p *Properties, base structPointer) (n int) {
+	s := *structPointer_Bytes(base, p.field)
+	if s == nil && !p.oneof {
+		return 0
+	}
+	n += len(p.tagcode)
+	n += sizeRawBytes(s)
+	return
+}
+
+func size_proto3_slice_byte(p *Properties, base structPointer) (n int) {
+	s := *structPointer_Bytes(base, p.field)
+	if len(s) == 0 && !p.oneof {
+		return 0
+	}
+	n += len(p.tagcode)
+	n += sizeRawBytes(s)
+	return
+}
+
+// Encode a slice of int32s ([]int32).
+func (o *Buffer) enc_slice_int32(p *Properties, base structPointer) error {
+	s := structPointer_Word32Slice(base, p.field)
+	l := s.Len()
+	if l == 0 {
+		return ErrNil
+	}
+	for i := 0; i < l; i++ {
+		o.buf = append(o.buf, p.tagcode...)
+		x := int32(s.Index(i)) // permit sign extension to use full 64-bit range
+		p.valEnc(o, uint64(x))
+	}
+	return nil
+}
+
+func size_slice_int32(p *Properties, base structPointer) (n int) {
+	s := structPointer_Word32Slice(base, p.field)
+	l := s.Len()
+	if l == 0 {
+		return 0
+	}
+	for i := 0; i < l; i++ {
+		n += len(p.tagcode)
+		x := int32(s.Index(i)) // permit sign extension to use full 64-bit range
+		n += p.valSize(uint64(x))
+	}
+	return
+}
+
+// Encode a slice of int32s ([]int32) in packed format.
+func (o *Buffer) enc_slice_packed_int32(p *Properties, base structPointer) error {
+	s := structPointer_Word32Slice(base, p.field)
+	l := s.Len()
+	if l == 0 {
+		return ErrNil
+	}
+	// TODO: Reuse a Buffer.
+	buf := NewBuffer(nil)
+	for i := 0; i < l; i++ {
+		x := int32(s.Index(i)) // permit sign extension to use full 64-bit range
+		p.valEnc(buf, uint64(x))
+	}
+
+	o.buf = append(o.buf, p.tagcode...)
+	o.EncodeVarint(uint64(len(buf.buf)))
+	o.buf = append(o.buf, buf.buf...)
+	return nil
+}
+
+func size_slice_packed_int32(p *Properties, base structPointer) (n int) {
+	s := structPointer_Word32Slice(base, p.field)
+	l := s.Len()
+	if l == 0 {
+		return 0
+	}
+	var bufSize int
+	for i := 0; i < l; i++ {
+		x := int32(s.Index(i)) // permit sign extension to use full 64-bit range
+		bufSize += p.valSize(uint64(x))
+	}
+
+	n += len(p.tagcode)
+	n += sizeVarint(uint64(bufSize))
+	n += bufSize
+	return
+}
+
+// Encode a slice of uint32s ([]uint32).
+// Exactly the same as int32, except for no sign extension.
+func (o *Buffer) enc_slice_uint32(p *Properties, base structPointer) error {
+	s := structPointer_Word32Slice(base, p.field)
+	l := s.Len()
+	if l == 0 {
+		return ErrNil
+	}
+	for i := 0; i < l; i++ {
+		o.buf = append(o.buf, p.tagcode...)
+		x := s.Index(i)
+		p.valEnc(o, uint64(x))
+	}
+	return nil
+}
+
+func size_slice_uint32(p *Properties, base structPointer) (n int) {
+	s := structPointer_Word32Slice(base, p.field)
+	l := s.Len()
+	if l == 0 {
+		return 0
+	}
+	for i := 0; i < l; i++ {
+		n += len(p.tagcode)
+		x := s.Index(i)
+		n += p.valSize(uint64(x))
+	}
+	return
+}
+
+// Encode a slice of uint32s ([]uint32) in packed format.
+// Exactly the same as int32, except for no sign extension.
+func (o *Buffer) enc_slice_packed_uint32(p *Properties, base structPointer) error {
+	s := structPointer_Word32Slice(base, p.field)
+	l := s.Len()
+	if l == 0 {
+		return ErrNil
+	}
+	// TODO: Reuse a Buffer.
+	buf := NewBuffer(nil)
+	for i := 0; i < l; i++ {
+		p.valEnc(buf, uint64(s.Index(i)))
+	}
+
+	o.buf = append(o.buf, p.tagcode...)
+	o.EncodeVarint(uint64(len(buf.buf)))
+	o.buf = append(o.buf, buf.buf...)
+	return nil
+}
+
+func size_slice_packed_uint32(p *Properties, base structPointer) (n int) {
+	s := structPointer_Word32Slice(base, p.field)
+	l := s.Len()
+	if l == 0 {
+		return 0
+	}
+	var bufSize int
+	for i := 0; i < l; i++ {
+		bufSize += p.valSize(uint64(s.Index(i)))
+	}
+
+	n += len(p.tagcode)
+	n += sizeVarint(uint64(bufSize))
+	n += bufSize
+	return
+}
+
+// Encode a slice of int64s ([]int64).
+func (o *Buffer) enc_slice_int64(p *Properties, base structPointer) error {
+	s := structPointer_Word64Slice(base, p.field)
+	l := s.Len()
+	if l == 0 {
+		return ErrNil
+	}
+	for i := 0; i < l; i++ {
+		o.buf = append(o.buf, p.tagcode...)
+		p.valEnc(o, s.Index(i))
+	}
+	return nil
+}
+
+func size_slice_int64(p *Properties, base structPointer) (n int) {
+	s := structPointer_Word64Slice(base, p.field)
+	l := s.Len()
+	if l == 0 {
+		return 0
+	}
+	for i := 0; i < l; i++ {
+		n += len(p.tagcode)
+		n += p.valSize(s.Index(i))
+	}
+	return
+}
+
+// Encode a slice of int64s ([]int64) in packed format.
+func (o *Buffer) enc_slice_packed_int64(p *Properties, base structPointer) error {
+	s := structPointer_Word64Slice(base, p.field)
+	l := s.Len()
+	if l == 0 {
+		return ErrNil
+	}
+	// TODO: Reuse a Buffer.
+	buf := NewBuffer(nil)
+	for i := 0; i < l; i++ {
+		p.valEnc(buf, s.Index(i))
+	}
+
+	o.buf = append(o.buf, p.tagcode...)
+	o.EncodeVarint(uint64(len(buf.buf)))
+	o.buf = append(o.buf, buf.buf...)
+	return nil
+}
+
+func size_slice_packed_int64(p *Properties, base structPointer) (n int) {
+	s := structPointer_Word64Slice(base, p.field)
+	l := s.Len()
+	if l == 0 {
+		return 0
+	}
+	var bufSize int
+	for i := 0; i < l; i++ {
+		bufSize += p.valSize(s.Index(i))
+	}
+
+	n += len(p.tagcode)
+	n += sizeVarint(uint64(bufSize))
+	n += bufSize
+	return
+}
+
+// Encode a slice of slice of bytes ([][]byte).
+func (o *Buffer) enc_slice_slice_byte(p *Properties, base structPointer) error {
+	ss := *structPointer_BytesSlice(base, p.field)
+	l := len(ss)
+	if l == 0 {
+		return ErrNil
+	}
+	for i := 0; i < l; i++ {
+		o.buf = append(o.buf, p.tagcode...)
+		o.EncodeRawBytes(ss[i])
+	}
+	return nil
+}
+
+func size_slice_slice_byte(p *Properties, base structPointer) (n int) {
+	ss := *structPointer_BytesSlice(base, p.field)
+	l := len(ss)
+	if l == 0 {
+		return 0
+	}
+	n += l * len(p.tagcode)
+	for i := 0; i < l; i++ {
+		n += sizeRawBytes(ss[i])
+	}
+	return
+}
+
+// Encode a slice of strings ([]string).
+func (o *Buffer) enc_slice_string(p *Properties, base structPointer) error {
+	ss := *structPointer_StringSlice(base, p.field)
+	l := len(ss)
+	for i := 0; i < l; i++ {
+		o.buf = append(o.buf, p.tagcode...)
+		o.EncodeStringBytes(ss[i])
+	}
+	return nil
+}
+
+func size_slice_string(p *Properties, base structPointer) (n int) {
+	ss := *structPointer_StringSlice(base, p.field)
+	l := len(ss)
+	n += l * len(p.tagcode)
+	for i := 0; i < l; i++ {
+		n += sizeStringBytes(ss[i])
+	}
+	return
+}
+
+// Encode a slice of message structs ([]*struct).
+func (o *Buffer) enc_slice_struct_message(p *Properties, base structPointer) error {
+	var state errorState
+	s := structPointer_StructPointerSlice(base, p.field)
+	l := s.Len()
+
+	for i := 0; i < l; i++ {
+		structp := s.Index(i)
+		if structPointer_IsNil(structp) {
+			return errRepeatedHasNil
+		}
+
+		// Can the object marshal itself?
+		if p.isMarshaler {
+			m := structPointer_Interface(structp, p.stype).(Marshaler)
+			data, err := m.Marshal()
+			if err != nil && !state.shouldContinue(err, nil) {
+				return err
+			}
+			o.buf = append(o.buf, p.tagcode...)
+			o.EncodeRawBytes(data)
+			continue
+		}
+
+		o.buf = append(o.buf, p.tagcode...)
+		err := o.enc_len_struct(p.sprop, structp, &state)
+		if err != nil && !state.shouldContinue(err, nil) {
+			if err == ErrNil {
+				return errRepeatedHasNil
+			}
+			return err
+		}
+	}
+	return state.err
+}
+
+func size_slice_struct_message(p *Properties, base structPointer) (n int) {
+	s := structPointer_StructPointerSlice(base, p.field)
+	l := s.Len()
+	n += l * len(p.tagcode)
+	for i := 0; i < l; i++ {
+		structp := s.Index(i)
+		if structPointer_IsNil(structp) {
+			return // return the size up to this point
+		}
+
+		// Can the object marshal itself?
+		if p.isMarshaler {
+			m := structPointer_Interface(structp, p.stype).(Marshaler)
+			data, _ := m.Marshal()
+			n += sizeRawBytes(data)
+			continue
+		}
+
+		n0 := size_struct(p.sprop, structp)
+		n1 := sizeVarint(uint64(n0)) // size of encoded length
+		n += n0 + n1
+	}
+	return
+}
+
+// Encode a slice of group structs ([]*struct).
+func (o *Buffer) enc_slice_struct_group(p *Properties, base structPointer) error {
+	var state errorState
+	s := structPointer_StructPointerSlice(base, p.field)
+	l := s.Len()
+
+	for i := 0; i < l; i++ {
+		b := s.Index(i)
+		if structPointer_IsNil(b) {
+			return errRepeatedHasNil
+		}
+
+		o.EncodeVarint(uint64((p.Tag << 3) | WireStartGroup))
+
+		err := o.enc_struct(p.sprop, b)
+
+		if err != nil && !state.shouldContinue(err, nil) {
+			if err == ErrNil {
+				return errRepeatedHasNil
+			}
+			return err
+		}
+
+		o.EncodeVarint(uint64((p.Tag << 3) | WireEndGroup))
+	}
+	return state.err
+}
+
+func size_slice_struct_group(p *Properties, base structPointer) (n int) {
+	s := structPointer_StructPointerSlice(base, p.field)
+	l := s.Len()
+
+	n += l * sizeVarint(uint64((p.Tag<<3)|WireStartGroup))
+	n += l * sizeVarint(uint64((p.Tag<<3)|WireEndGroup))
+	for i := 0; i < l; i++ {
+		b := s.Index(i)
+		if structPointer_IsNil(b) {
+			return // return size up to this point
+		}
+
+		n += size_struct(p.sprop, b)
+	}
+	return
+}
+
+// Encode an extension map.
+func (o *Buffer) enc_map(p *Properties, base structPointer) error {
+	exts := structPointer_ExtMap(base, p.field)
+	if err := encodeExtensionsMap(*exts); err != nil {
+		return err
+	}
+
+	return o.enc_map_body(*exts)
+}
+
+func (o *Buffer) enc_exts(p *Properties, base structPointer) error {
+	exts := structPointer_Extensions(base, p.field)
+
+	v, mu := exts.extensionsRead()
+	if v == nil {
+		return nil
+	}
+
+	mu.Lock()
+	defer mu.Unlock()
+	if err := encodeExtensionsMap(v); err != nil {
+		return err
+	}
+
+	return o.enc_map_body(v)
+}
+
+func (o *Buffer) enc_map_body(v map[int32]Extension) error {
+	// Fast-path for common cases: zero or one extensions.
+	if len(v) <= 1 {
+		for _, e := range v {
+			o.buf = append(o.buf, e.enc...)
+		}
+		return nil
+	}
+
+	// Sort keys to provide a deterministic encoding.
+	keys := make([]int, 0, len(v))
+	for k := range v {
+		keys = append(keys, int(k))
+	}
+	sort.Ints(keys)
+
+	for _, k := range keys {
+		o.buf = append(o.buf, v[int32(k)].enc...)
+	}
+	return nil
+}
+
+func size_map(p *Properties, base structPointer) int {
+	v := structPointer_ExtMap(base, p.field)
+	return extensionsMapSize(*v)
+}
+
+func size_exts(p *Properties, base structPointer) int {
+	v := structPointer_Extensions(base, p.field)
+	return extensionsSize(v)
+}
+
+// Encode a map field.
+func (o *Buffer) enc_new_map(p *Properties, base structPointer) error {
+	var state errorState // XXX: or do we need to plumb this through?
+
+	/*
+		A map defined as
+			map<key_type, value_type> map_field = N;
+		is encoded in the same way as
+			message MapFieldEntry {
+				key_type key = 1;
+				value_type value = 2;
+			}
+			repeated MapFieldEntry map_field = N;
+	*/
+
+	v := structPointer_NewAt(base, p.field, p.mtype).Elem() // map[K]V
+	if v.Len() == 0 {
+		return nil
+	}
+
+	keycopy, valcopy, keybase, valbase := mapEncodeScratch(p.mtype)
+
+	enc := func() error {
+		if err := p.mkeyprop.enc(o, p.mkeyprop, keybase); err != nil {
+			return err
+		}
+		if err := p.mvalprop.enc(o, p.mvalprop, valbase); err != nil && err != ErrNil {
+			return err
+		}
+		return nil
+	}
+
+	// Don't sort map keys. It is not required by the spec, and C++ doesn't do it.
+	for _, key := range v.MapKeys() {
+		val := v.MapIndex(key)
+
+		keycopy.Set(key)
+		valcopy.Set(val)
+
+		o.buf = append(o.buf, p.tagcode...)
+		if err := o.enc_len_thing(enc, &state); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func size_new_map(p *Properties, base structPointer) int {
+	v := structPointer_NewAt(base, p.field, p.mtype).Elem() // map[K]V
+
+	keycopy, valcopy, keybase, valbase := mapEncodeScratch(p.mtype)
+
+	n := 0
+	for _, key := range v.MapKeys() {
+		val := v.MapIndex(key)
+		keycopy.Set(key)
+		valcopy.Set(val)
+
+		// Tag codes for key and val are the responsibility of the sub-sizer.
+		keysize := p.mkeyprop.size(p.mkeyprop, keybase)
+		valsize := p.mvalprop.size(p.mvalprop, valbase)
+		entry := keysize + valsize
+		// Add on tag code and length of map entry itself.
+		n += len(p.tagcode) + sizeVarint(uint64(entry)) + entry
+	}
+	return n
+}
+
+// mapEncodeScratch returns a new reflect.Value matching the map's value type,
+// and a structPointer suitable for passing to an encoder or sizer.
+func mapEncodeScratch(mapType reflect.Type) (keycopy, valcopy reflect.Value, keybase, valbase structPointer) {
+	// Prepare addressable doubly-indirect placeholders for the key and value types.
+	// This is needed because the element-type encoders expect **T, but the map iteration produces T.
+
+	keycopy = reflect.New(mapType.Key()).Elem()                 // addressable K
+	keyptr := reflect.New(reflect.PtrTo(keycopy.Type())).Elem() // addressable *K
+	keyptr.Set(keycopy.Addr())                                  //
+	keybase = toStructPointer(keyptr.Addr())                    // **K
+
+	// Value types are more varied and require special handling.
+	switch mapType.Elem().Kind() {
+	case reflect.Slice:
+		// []byte
+		var dummy []byte
+		valcopy = reflect.ValueOf(&dummy).Elem() // addressable []byte
+		valbase = toStructPointer(valcopy.Addr())
+	case reflect.Ptr:
+		// message; the generated field type is map[K]*Msg (so V is *Msg),
+		// so we only need one level of indirection.
+		valcopy = reflect.New(mapType.Elem()).Elem() // addressable V
+		valbase = toStructPointer(valcopy.Addr())
+	default:
+		// everything else
+		valcopy = reflect.New(mapType.Elem()).Elem()                // addressable V
+		valptr := reflect.New(reflect.PtrTo(valcopy.Type())).Elem() // addressable *V
+		valptr.Set(valcopy.Addr())                                  //
+		valbase = toStructPointer(valptr.Addr())                    // **V
+	}
+	return
+}
+
+// Encode a struct.
+func (o *Buffer) enc_struct(prop *StructProperties, base structPointer) error {
+	var state errorState
+	// Encode fields in tag order so that decoders may use optimizations
+	// that depend on the ordering.
+	// https://developers.google.com/protocol-buffers/docs/encoding#order
+	for _, i := range prop.order {
+		p := prop.Prop[i]
+		if p.enc != nil {
+			err := p.enc(o, p, base)
+			if err != nil {
+				if err == ErrNil {
+					if p.Required && state.err == nil {
+						state.err = &RequiredNotSetError{p.Name}
+					}
+				} else if err == errRepeatedHasNil {
+					// Give more context to nil values in repeated fields.
+					return errors.New("repeated field " + p.OrigName + " has nil element")
+				} else if !state.shouldContinue(err, p) {
+					return err
+				}
+			}
+			if len(o.buf) > maxMarshalSize {
+				return ErrTooLarge
+			}
+		}
+	}
+
+	// Do oneof fields.
+	if prop.oneofMarshaler != nil {
+		m := structPointer_Interface(base, prop.stype).(Message)
+		if err := prop.oneofMarshaler(m, o); err == ErrNil {
+			return errOneofHasNil
+		} else if err != nil {
+			return err
+		}
+	}
+
+	// Add unrecognized fields at the end.
+	if prop.unrecField.IsValid() {
+		v := *structPointer_Bytes(base, prop.unrecField)
+		if len(o.buf)+len(v) > maxMarshalSize {
+			return ErrTooLarge
+		}
+		if len(v) > 0 {
+			o.buf = append(o.buf, v...)
+		}
+	}
+
+	return state.err
+}
+
+func size_struct(prop *StructProperties, base structPointer) (n int) {
+	for _, i := range prop.order {
+		p := prop.Prop[i]
+		if p.size != nil {
+			n += p.size(p, base)
+		}
+	}
+
+	// Add unrecognized fields at the end.
+	if prop.unrecField.IsValid() {
+		v := *structPointer_Bytes(base, prop.unrecField)
+		n += len(v)
+	}
+
+	// Factor in any oneof fields.
+	if prop.oneofSizer != nil {
+		m := structPointer_Interface(base, prop.stype).(Message)
+		n += prop.oneofSizer(m)
+	}
+
+	return
+}
+
+var zeroes [20]byte // longer than any conceivable sizeVarint
+
+// Encode a struct, preceded by its encoded length (as a varint).
+func (o *Buffer) enc_len_struct(prop *StructProperties, base structPointer, state *errorState) error {
+	return o.enc_len_thing(func() error { return o.enc_struct(prop, base) }, state)
+}
+
+// Encode something, preceded by its encoded length (as a varint).
+func (o *Buffer) enc_len_thing(enc func() error, state *errorState) error {
+	iLen := len(o.buf)
+	o.buf = append(o.buf, 0, 0, 0, 0) // reserve four bytes for length
+	iMsg := len(o.buf)
+	err := enc()
+	if err != nil && !state.shouldContinue(err, nil) {
+		return err
+	}
+	lMsg := len(o.buf) - iMsg
+	lLen := sizeVarint(uint64(lMsg))
+	switch x := lLen - (iMsg - iLen); {
+	case x > 0: // actual length is x bytes larger than the space we reserved
+		// Move msg x bytes right.
+		o.buf = append(o.buf, zeroes[:x]...)
+		copy(o.buf[iMsg+x:], o.buf[iMsg:iMsg+lMsg])
+	case x < 0: // actual length is x bytes smaller than the space we reserved
+		// Move msg x bytes left.
+		copy(o.buf[iMsg+x:], o.buf[iMsg:iMsg+lMsg])
+		o.buf = o.buf[:len(o.buf)+x] // x is negative
+	}
+	// Encode the length in the reserved space.
+	o.buf = o.buf[:iLen]
+	o.EncodeVarint(uint64(lMsg))
+	o.buf = o.buf[:len(o.buf)+lMsg]
+	return state.err
+}
+
+// errorState maintains the first error that occurs and updates that error
+// with additional context.
+type errorState struct {
+	err error
+}
+
+// shouldContinue reports whether encoding should continue upon encountering the
+// given error. If the error is RequiredNotSetError, shouldContinue returns true
+// and, if this is the first appearance of that error, remembers it for future
+// reporting.
+//
+// If prop is not nil, it may update any error with additional context about the
+// field with the error.
+func (s *errorState) shouldContinue(err error, prop *Properties) bool {
+	// Ignore unset required fields.
+	reqNotSet, ok := err.(*RequiredNotSetError)
+	if !ok {
+		return false
+	}
+	if s.err == nil {
+		if prop != nil {
+			err = &RequiredNotSetError{prop.Name + "." + reqNotSet.field}
+		}
+		s.err = err
+	}
+	return true
+}
diff --git a/vendor/github.com/golang/protobuf/proto/equal.go b/vendor/github.com/golang/protobuf/proto/equal.go
new file mode 100644
index 000000000..2ed1cf596
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/equal.go
@@ -0,0 +1,300 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2011 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Protocol buffer comparison.
+
+package proto
+
+import (
+	"bytes"
+	"log"
+	"reflect"
+	"strings"
+)
+
+/*
+Equal returns true iff protocol buffers a and b are equal.
+The arguments must both be pointers to protocol buffer structs.
+
+Equality is defined in this way:
+  - Two messages are equal iff they are the same type,
+    corresponding fields are equal, unknown field sets
+    are equal, and extensions sets are equal.
+  - Two set scalar fields are equal iff their values are equal.
+    If the fields are of a floating-point type, remember that
+    NaN != x for all x, including NaN. If the message is defined
+    in a proto3 .proto file, fields are not "set"; specifically,
+    zero length proto3 "bytes" fields are equal (nil == {}).
+  - Two repeated fields are equal iff their lengths are the same,
+    and their corresponding elements are equal. Note a "bytes" field,
+    although represented by []byte, is not a repeated field and the
+    rule for the scalar fields described above applies.
+  - Two unset fields are equal.
+  - Two unknown field sets are equal if their current
+    encoded state is equal.
+  - Two extension sets are equal iff they have corresponding
+    elements that are pairwise equal.
+  - Two map fields are equal iff their lengths are the same,
+    and they contain the same set of elements. Zero-length map
+    fields are equal.
+  - Every other combination of things are not equal.
+
+The return value is undefined if a and b are not protocol buffers.
+*/
+func Equal(a, b Message) bool {
+	if a == nil || b == nil {
+		return a == b
+	}
+	v1, v2 := reflect.ValueOf(a), reflect.ValueOf(b)
+	if v1.Type() != v2.Type() {
+		return false
+	}
+	if v1.Kind() == reflect.Ptr {
+		if v1.IsNil() {
+			return v2.IsNil()
+		}
+		if v2.IsNil() {
+			return false
+		}
+		v1, v2 = v1.Elem(), v2.Elem()
+	}
+	if v1.Kind() != reflect.Struct {
+		return false
+	}
+	return equalStruct(v1, v2)
+}
+
+// v1 and v2 are known to have the same type.
+func equalStruct(v1, v2 reflect.Value) bool {
+	sprop := GetProperties(v1.Type())
+	for i := 0; i < v1.NumField(); i++ {
+		f := v1.Type().Field(i)
+		if strings.HasPrefix(f.Name, "XXX_") {
+			continue
+		}
+		f1, f2 := v1.Field(i), v2.Field(i)
+		if f.Type.Kind() == reflect.Ptr {
+			if n1, n2 := f1.IsNil(), f2.IsNil(); n1 && n2 {
+				// both unset
+				continue
+			} else if n1 != n2 {
+				// set/unset mismatch
+				return false
+			}
+			b1, ok := f1.Interface().(raw)
+			if ok {
+				b2 := f2.Interface().(raw)
+				// RawMessage
+				if !bytes.Equal(b1.Bytes(), b2.Bytes()) {
+					return false
+				}
+				continue
+			}
+			f1, f2 = f1.Elem(), f2.Elem()
+		}
+		if !equalAny(f1, f2, sprop.Prop[i]) {
+			return false
+		}
+	}
+
+	if em1 := v1.FieldByName("XXX_InternalExtensions"); em1.IsValid() {
+		em2 := v2.FieldByName("XXX_InternalExtensions")
+		if !equalExtensions(v1.Type(), em1.Interface().(XXX_InternalExtensions), em2.Interface().(XXX_InternalExtensions)) {
+			return false
+		}
+	}
+
+	if em1 := v1.FieldByName("XXX_extensions"); em1.IsValid() {
+		em2 := v2.FieldByName("XXX_extensions")
+		if !equalExtMap(v1.Type(), em1.Interface().(map[int32]Extension), em2.Interface().(map[int32]Extension)) {
+			return false
+		}
+	}
+
+	uf := v1.FieldByName("XXX_unrecognized")
+	if !uf.IsValid() {
+		return true
+	}
+
+	u1 := uf.Bytes()
+	u2 := v2.FieldByName("XXX_unrecognized").Bytes()
+	if !bytes.Equal(u1, u2) {
+		return false
+	}
+
+	return true
+}
+
+// v1 and v2 are known to have the same type.
+// prop may be nil.
+func equalAny(v1, v2 reflect.Value, prop *Properties) bool {
+	if v1.Type() == protoMessageType {
+		m1, _ := v1.Interface().(Message)
+		m2, _ := v2.Interface().(Message)
+		return Equal(m1, m2)
+	}
+	switch v1.Kind() {
+	case reflect.Bool:
+		return v1.Bool() == v2.Bool()
+	case reflect.Float32, reflect.Float64:
+		return v1.Float() == v2.Float()
+	case reflect.Int32, reflect.Int64:
+		return v1.Int() == v2.Int()
+	case reflect.Interface:
+		// Probably a oneof field; compare the inner values.
+		n1, n2 := v1.IsNil(), v2.IsNil()
+		if n1 || n2 {
+			return n1 == n2
+		}
+		e1, e2 := v1.Elem(), v2.Elem()
+		if e1.Type() != e2.Type() {
+			return false
+		}
+		return equalAny(e1, e2, nil)
+	case reflect.Map:
+		if v1.Len() != v2.Len() {
+			return false
+		}
+		for _, key := range v1.MapKeys() {
+			val2 := v2.MapIndex(key)
+			if !val2.IsValid() {
+				// This key was not found in the second map.
+				return false
+			}
+			if !equalAny(v1.MapIndex(key), val2, nil) {
+				return false
+			}
+		}
+		return true
+	case reflect.Ptr:
+		// Maps may have nil values in them, so check for nil.
+		if v1.IsNil() && v2.IsNil() {
+			return true
+		}
+		if v1.IsNil() != v2.IsNil() {
+			return false
+		}
+		return equalAny(v1.Elem(), v2.Elem(), prop)
+	case reflect.Slice:
+		if v1.Type().Elem().Kind() == reflect.Uint8 {
+			// short circuit: []byte
+
+			// Edge case: if this is in a proto3 message, a zero length
+			// bytes field is considered the zero value.
+			if prop != nil && prop.proto3 && v1.Len() == 0 && v2.Len() == 0 {
+				return true
+			}
+			if v1.IsNil() != v2.IsNil() {
+				return false
+			}
+			return bytes.Equal(v1.Interface().([]byte), v2.Interface().([]byte))
+		}
+
+		if v1.Len() != v2.Len() {
+			return false
+		}
+		for i := 0; i < v1.Len(); i++ {
+			if !equalAny(v1.Index(i), v2.Index(i), prop) {
+				return false
+			}
+		}
+		return true
+	case reflect.String:
+		return v1.Interface().(string) == v2.Interface().(string)
+	case reflect.Struct:
+		return equalStruct(v1, v2)
+	case reflect.Uint32, reflect.Uint64:
+		return v1.Uint() == v2.Uint()
+	}
+
+	// unknown type, so not a protocol buffer
+	log.Printf("proto: don't know how to compare %v", v1)
+	return false
+}
+
+// base is the struct type that the extensions are based on.
+// x1 and x2 are InternalExtensions.
+func equalExtensions(base reflect.Type, x1, x2 XXX_InternalExtensions) bool {
+	em1, _ := x1.extensionsRead()
+	em2, _ := x2.extensionsRead()
+	return equalExtMap(base, em1, em2)
+}
+
+func equalExtMap(base reflect.Type, em1, em2 map[int32]Extension) bool {
+	if len(em1) != len(em2) {
+		return false
+	}
+
+	for extNum, e1 := range em1 {
+		e2, ok := em2[extNum]
+		if !ok {
+			return false
+		}
+
+		m1, m2 := e1.value, e2.value
+
+		if m1 != nil && m2 != nil {
+			// Both are unencoded.
+			if !equalAny(reflect.ValueOf(m1), reflect.ValueOf(m2), nil) {
+				return false
+			}
+			continue
+		}
+
+		// At least one is encoded. To do a semantically correct comparison
+		// we need to unmarshal them first.
+		var desc *ExtensionDesc
+		if m := extensionMaps[base]; m != nil {
+			desc = m[extNum]
+		}
+		if desc == nil {
+			log.Printf("proto: don't know how to compare extension %d of %v", extNum, base)
+			continue
+		}
+		var err error
+		if m1 == nil {
+			m1, err = decodeExtension(e1.enc, desc)
+		}
+		if m2 == nil && err == nil {
+			m2, err = decodeExtension(e2.enc, desc)
+		}
+		if err != nil {
+			// The encoded form is invalid.
+			log.Printf("proto: badly encoded extension %d of %v: %v", extNum, base, err)
+			return false
+		}
+		if !equalAny(reflect.ValueOf(m1), reflect.ValueOf(m2), nil) {
+			return false
+		}
+	}
+
+	return true
+}
diff --git a/vendor/github.com/golang/protobuf/proto/extensions.go b/vendor/github.com/golang/protobuf/proto/extensions.go
new file mode 100644
index 000000000..eaad21831
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/extensions.go
@@ -0,0 +1,587 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2010 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package proto
+
+/*
+ * Types and routines for supporting protocol buffer extensions.
+ */
+
+import (
+	"errors"
+	"fmt"
+	"reflect"
+	"strconv"
+	"sync"
+)
+
+// ErrMissingExtension is the error returned by GetExtension if the named extension is not in the message.
+var ErrMissingExtension = errors.New("proto: missing extension")
+
+// ExtensionRange represents a range of message extensions for a protocol buffer.
+// Used in code generated by the protocol compiler.
+type ExtensionRange struct {
+	Start, End int32 // both inclusive
+}
+
+// extendableProto is an interface implemented by any protocol buffer generated by the current
+// proto compiler that may be extended.
+type extendableProto interface {
+	Message
+	ExtensionRangeArray() []ExtensionRange
+	extensionsWrite() map[int32]Extension
+	extensionsRead() (map[int32]Extension, sync.Locker)
+}
+
+// extendableProtoV1 is an interface implemented by a protocol buffer generated by the previous
+// version of the proto compiler that may be extended.
+type extendableProtoV1 interface {
+	Message
+	ExtensionRangeArray() []ExtensionRange
+	ExtensionMap() map[int32]Extension
+}
+
+// extensionAdapter is a wrapper around extendableProtoV1 that implements extendableProto.
+type extensionAdapter struct {
+	extendableProtoV1
+}
+
+func (e extensionAdapter) extensionsWrite() map[int32]Extension {
+	return e.ExtensionMap()
+}
+
+func (e extensionAdapter) extensionsRead() (map[int32]Extension, sync.Locker) {
+	return e.ExtensionMap(), notLocker{}
+}
+
+// notLocker is a sync.Locker whose Lock and Unlock methods are nops.
+type notLocker struct{}
+
+func (n notLocker) Lock()   {}
+func (n notLocker) Unlock() {}
+
+// extendable returns the extendableProto interface for the given generated proto message.
+// If the proto message has the old extension format, it returns a wrapper that implements
+// the extendableProto interface.
+func extendable(p interface{}) (extendableProto, bool) {
+	if ep, ok := p.(extendableProto); ok {
+		return ep, ok
+	}
+	if ep, ok := p.(extendableProtoV1); ok {
+		return extensionAdapter{ep}, ok
+	}
+	return nil, false
+}
+
+// XXX_InternalExtensions is an internal representation of proto extensions.
+//
+// Each generated message struct type embeds an anonymous XXX_InternalExtensions field,
+// thus gaining the unexported 'extensions' method, which can be called only from the proto package.
+//
+// The methods of XXX_InternalExtensions are not concurrency safe in general,
+// but calls to logically read-only methods such as has and get may be executed concurrently.
+type XXX_InternalExtensions struct {
+	// The struct must be indirect so that if a user inadvertently copies a
+	// generated message and its embedded XXX_InternalExtensions, they
+	// avoid the mayhem of a copied mutex.
+	//
+	// The mutex serializes all logically read-only operations to p.extensionMap.
+	// It is up to the client to ensure that write operations to p.extensionMap are
+	// mutually exclusive with other accesses.
+	p *struct {
+		mu           sync.Mutex
+		extensionMap map[int32]Extension
+	}
+}
+
+// extensionsWrite returns the extension map, creating it on first use.
+func (e *XXX_InternalExtensions) extensionsWrite() map[int32]Extension {
+	if e.p == nil {
+		e.p = new(struct {
+			mu           sync.Mutex
+			extensionMap map[int32]Extension
+		})
+		e.p.extensionMap = make(map[int32]Extension)
+	}
+	return e.p.extensionMap
+}
+
+// extensionsRead returns the extensions map for read-only use.  It may be nil.
+// The caller must hold the returned mutex's lock when accessing Elements within the map.
+func (e *XXX_InternalExtensions) extensionsRead() (map[int32]Extension, sync.Locker) {
+	if e.p == nil {
+		return nil, nil
+	}
+	return e.p.extensionMap, &e.p.mu
+}
+
+var extendableProtoType = reflect.TypeOf((*extendableProto)(nil)).Elem()
+var extendableProtoV1Type = reflect.TypeOf((*extendableProtoV1)(nil)).Elem()
+
+// ExtensionDesc represents an extension specification.
+// Used in generated code from the protocol compiler.
+type ExtensionDesc struct {
+	ExtendedType  Message     // nil pointer to the type that is being extended
+	ExtensionType interface{} // nil pointer to the extension type
+	Field         int32       // field number
+	Name          string      // fully-qualified name of extension, for text formatting
+	Tag           string      // protobuf tag style
+	Filename      string      // name of the file in which the extension is defined
+}
+
+func (ed *ExtensionDesc) repeated() bool {
+	t := reflect.TypeOf(ed.ExtensionType)
+	return t.Kind() == reflect.Slice && t.Elem().Kind() != reflect.Uint8
+}
+
+// Extension represents an extension in a message.
+type Extension struct {
+	// When an extension is stored in a message using SetExtension
+	// only desc and value are set. When the message is marshaled
+	// enc will be set to the encoded form of the message.
+	//
+	// When a message is unmarshaled and contains extensions, each
+	// extension will have only enc set. When such an extension is
+	// accessed using GetExtension (or GetExtensions) desc and value
+	// will be set.
+	desc  *ExtensionDesc
+	value interface{}
+	enc   []byte
+}
+
+// SetRawExtension is for testing only.
+func SetRawExtension(base Message, id int32, b []byte) {
+	epb, ok := extendable(base)
+	if !ok {
+		return
+	}
+	extmap := epb.extensionsWrite()
+	extmap[id] = Extension{enc: b}
+}
+
+// isExtensionField returns true iff the given field number is in an extension range.
+func isExtensionField(pb extendableProto, field int32) bool {
+	for _, er := range pb.ExtensionRangeArray() {
+		if er.Start <= field && field <= er.End {
+			return true
+		}
+	}
+	return false
+}
+
+// checkExtensionTypes checks that the given extension is valid for pb.
+func checkExtensionTypes(pb extendableProto, extension *ExtensionDesc) error {
+	var pbi interface{} = pb
+	// Check the extended type.
+	if ea, ok := pbi.(extensionAdapter); ok {
+		pbi = ea.extendableProtoV1
+	}
+	if a, b := reflect.TypeOf(pbi), reflect.TypeOf(extension.ExtendedType); a != b {
+		return errors.New("proto: bad extended type; " + b.String() + " does not extend " + a.String())
+	}
+	// Check the range.
+	if !isExtensionField(pb, extension.Field) {
+		return errors.New("proto: bad extension number; not in declared ranges")
+	}
+	return nil
+}
+
+// extPropKey is sufficient to uniquely identify an extension.
+type extPropKey struct {
+	base  reflect.Type
+	field int32
+}
+
+var extProp = struct {
+	sync.RWMutex
+	m map[extPropKey]*Properties
+}{
+	m: make(map[extPropKey]*Properties),
+}
+
+func extensionProperties(ed *ExtensionDesc) *Properties {
+	key := extPropKey{base: reflect.TypeOf(ed.ExtendedType), field: ed.Field}
+
+	extProp.RLock()
+	if prop, ok := extProp.m[key]; ok {
+		extProp.RUnlock()
+		return prop
+	}
+	extProp.RUnlock()
+
+	extProp.Lock()
+	defer extProp.Unlock()
+	// Check again.
+	if prop, ok := extProp.m[key]; ok {
+		return prop
+	}
+
+	prop := new(Properties)
+	prop.Init(reflect.TypeOf(ed.ExtensionType), "unknown_name", ed.Tag, nil)
+	extProp.m[key] = prop
+	return prop
+}
+
+// encode encodes any unmarshaled (unencoded) extensions in e.
+func encodeExtensions(e *XXX_InternalExtensions) error {
+	m, mu := e.extensionsRead()
+	if m == nil {
+		return nil // fast path
+	}
+	mu.Lock()
+	defer mu.Unlock()
+	return encodeExtensionsMap(m)
+}
+
+// encode encodes any unmarshaled (unencoded) extensions in e.
+func encodeExtensionsMap(m map[int32]Extension) error {
+	for k, e := range m {
+		if e.value == nil || e.desc == nil {
+			// Extension is only in its encoded form.
+			continue
+		}
+
+		// We don't skip extensions that have an encoded form set,
+		// because the extension value may have been mutated after
+		// the last time this function was called.
+
+		et := reflect.TypeOf(e.desc.ExtensionType)
+		props := extensionProperties(e.desc)
+
+		p := NewBuffer(nil)
+		// If e.value has type T, the encoder expects a *struct{ X T }.
+		// Pass a *T with a zero field and hope it all works out.
+		x := reflect.New(et)
+		x.Elem().Set(reflect.ValueOf(e.value))
+		if err := props.enc(p, props, toStructPointer(x)); err != nil {
+			return err
+		}
+		e.enc = p.buf
+		m[k] = e
+	}
+	return nil
+}
+
+func extensionsSize(e *XXX_InternalExtensions) (n int) {
+	m, mu := e.extensionsRead()
+	if m == nil {
+		return 0
+	}
+	mu.Lock()
+	defer mu.Unlock()
+	return extensionsMapSize(m)
+}
+
+func extensionsMapSize(m map[int32]Extension) (n int) {
+	for _, e := range m {
+		if e.value == nil || e.desc == nil {
+			// Extension is only in its encoded form.
+			n += len(e.enc)
+			continue
+		}
+
+		// We don't skip extensions that have an encoded form set,
+		// because the extension value may have been mutated after
+		// the last time this function was called.
+
+		et := reflect.TypeOf(e.desc.ExtensionType)
+		props := extensionProperties(e.desc)
+
+		// If e.value has type T, the encoder expects a *struct{ X T }.
+		// Pass a *T with a zero field and hope it all works out.
+		x := reflect.New(et)
+		x.Elem().Set(reflect.ValueOf(e.value))
+		n += props.size(props, toStructPointer(x))
+	}
+	return
+}
+
+// HasExtension returns whether the given extension is present in pb.
+func HasExtension(pb Message, extension *ExtensionDesc) bool {
+	// TODO: Check types, field numbers, etc.?
+	epb, ok := extendable(pb)
+	if !ok {
+		return false
+	}
+	extmap, mu := epb.extensionsRead()
+	if extmap == nil {
+		return false
+	}
+	mu.Lock()
+	_, ok = extmap[extension.Field]
+	mu.Unlock()
+	return ok
+}
+
+// ClearExtension removes the given extension from pb.
+func ClearExtension(pb Message, extension *ExtensionDesc) {
+	epb, ok := extendable(pb)
+	if !ok {
+		return
+	}
+	// TODO: Check types, field numbers, etc.?
+	extmap := epb.extensionsWrite()
+	delete(extmap, extension.Field)
+}
+
+// GetExtension parses and returns the given extension of pb.
+// If the extension is not present and has no default value it returns ErrMissingExtension.
+func GetExtension(pb Message, extension *ExtensionDesc) (interface{}, error) {
+	epb, ok := extendable(pb)
+	if !ok {
+		return nil, errors.New("proto: not an extendable proto")
+	}
+
+	if err := checkExtensionTypes(epb, extension); err != nil {
+		return nil, err
+	}
+
+	emap, mu := epb.extensionsRead()
+	if emap == nil {
+		return defaultExtensionValue(extension)
+	}
+	mu.Lock()
+	defer mu.Unlock()
+	e, ok := emap[extension.Field]
+	if !ok {
+		// defaultExtensionValue returns the default value or
+		// ErrMissingExtension if there is no default.
+		return defaultExtensionValue(extension)
+	}
+
+	if e.value != nil {
+		// Already decoded. Check the descriptor, though.
+		if e.desc != extension {
+			// This shouldn't happen. If it does, it means that
+			// GetExtension was called twice with two different
+			// descriptors with the same field number.
+			return nil, errors.New("proto: descriptor conflict")
+		}
+		return e.value, nil
+	}
+
+	v, err := decodeExtension(e.enc, extension)
+	if err != nil {
+		return nil, err
+	}
+
+	// Remember the decoded version and drop the encoded version.
+	// That way it is safe to mutate what we return.
+	e.value = v
+	e.desc = extension
+	e.enc = nil
+	emap[extension.Field] = e
+	return e.value, nil
+}
+
+// defaultExtensionValue returns the default value for extension.
+// If no default for an extension is defined ErrMissingExtension is returned.
+func defaultExtensionValue(extension *ExtensionDesc) (interface{}, error) {
+	t := reflect.TypeOf(extension.ExtensionType)
+	props := extensionProperties(extension)
+
+	sf, _, err := fieldDefault(t, props)
+	if err != nil {
+		return nil, err
+	}
+
+	if sf == nil || sf.value == nil {
+		// There is no default value.
+		return nil, ErrMissingExtension
+	}
+
+	if t.Kind() != reflect.Ptr {
+		// We do not need to return a Ptr, we can directly return sf.value.
+		return sf.value, nil
+	}
+
+	// We need to return an interface{} that is a pointer to sf.value.
+	value := reflect.New(t).Elem()
+	value.Set(reflect.New(value.Type().Elem()))
+	if sf.kind == reflect.Int32 {
+		// We may have an int32 or an enum, but the underlying data is int32.
+		// Since we can't set an int32 into a non int32 reflect.value directly
+		// set it as a int32.
+		value.Elem().SetInt(int64(sf.value.(int32)))
+	} else {
+		value.Elem().Set(reflect.ValueOf(sf.value))
+	}
+	return value.Interface(), nil
+}
+
+// decodeExtension decodes an extension encoded in b.
+func decodeExtension(b []byte, extension *ExtensionDesc) (interface{}, error) {
+	o := NewBuffer(b)
+
+	t := reflect.TypeOf(extension.ExtensionType)
+
+	props := extensionProperties(extension)
+
+	// t is a pointer to a struct, pointer to basic type or a slice.
+	// Allocate a "field" to store the pointer/slice itself; the
+	// pointer/slice will be stored here. We pass
+	// the address of this field to props.dec.
+	// This passes a zero field and a *t and lets props.dec
+	// interpret it as a *struct{ x t }.
+	value := reflect.New(t).Elem()
+
+	for {
+		// Discard wire type and field number varint. It isn't needed.
+		if _, err := o.DecodeVarint(); err != nil {
+			return nil, err
+		}
+
+		if err := props.dec(o, props, toStructPointer(value.Addr())); err != nil {
+			return nil, err
+		}
+
+		if o.index >= len(o.buf) {
+			break
+		}
+	}
+	return value.Interface(), nil
+}
+
+// GetExtensions returns a slice of the extensions present in pb that are also listed in es.
+// The returned slice has the same length as es; missing extensions will appear as nil elements.
+func GetExtensions(pb Message, es []*ExtensionDesc) (extensions []interface{}, err error) {
+	epb, ok := extendable(pb)
+	if !ok {
+		return nil, errors.New("proto: not an extendable proto")
+	}
+	extensions = make([]interface{}, len(es))
+	for i, e := range es {
+		extensions[i], err = GetExtension(epb, e)
+		if err == ErrMissingExtension {
+			err = nil
+		}
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+// ExtensionDescs returns a new slice containing pb's extension descriptors, in undefined order.
+// For non-registered extensions, ExtensionDescs returns an incomplete descriptor containing
+// just the Field field, which defines the extension's field number.
+func ExtensionDescs(pb Message) ([]*ExtensionDesc, error) {
+	epb, ok := extendable(pb)
+	if !ok {
+		return nil, fmt.Errorf("proto: %T is not an extendable proto.Message", pb)
+	}
+	registeredExtensions := RegisteredExtensions(pb)
+
+	emap, mu := epb.extensionsRead()
+	if emap == nil {
+		return nil, nil
+	}
+	mu.Lock()
+	defer mu.Unlock()
+	extensions := make([]*ExtensionDesc, 0, len(emap))
+	for extid, e := range emap {
+		desc := e.desc
+		if desc == nil {
+			desc = registeredExtensions[extid]
+			if desc == nil {
+				desc = &ExtensionDesc{Field: extid}
+			}
+		}
+
+		extensions = append(extensions, desc)
+	}
+	return extensions, nil
+}
+
+// SetExtension sets the specified extension of pb to the specified value.
+func SetExtension(pb Message, extension *ExtensionDesc, value interface{}) error {
+	epb, ok := extendable(pb)
+	if !ok {
+		return errors.New("proto: not an extendable proto")
+	}
+	if err := checkExtensionTypes(epb, extension); err != nil {
+		return err
+	}
+	typ := reflect.TypeOf(extension.ExtensionType)
+	if typ != reflect.TypeOf(value) {
+		return errors.New("proto: bad extension value type")
+	}
+	// nil extension values need to be caught early, because the
+	// encoder can't distinguish an ErrNil due to a nil extension
+	// from an ErrNil due to a missing field. Extensions are
+	// always optional, so the encoder would just swallow the error
+	// and drop all the extensions from the encoded message.
+	if reflect.ValueOf(value).IsNil() {
+		return fmt.Errorf("proto: SetExtension called with nil value of type %T", value)
+	}
+
+	extmap := epb.extensionsWrite()
+	extmap[extension.Field] = Extension{desc: extension, value: value}
+	return nil
+}
+
+// ClearAllExtensions clears all extensions from pb.
+func ClearAllExtensions(pb Message) {
+	epb, ok := extendable(pb)
+	if !ok {
+		return
+	}
+	m := epb.extensionsWrite()
+	for k := range m {
+		delete(m, k)
+	}
+}
+
+// A global registry of extensions.
+// The generated code will register the generated descriptors by calling RegisterExtension.
+
+var extensionMaps = make(map[reflect.Type]map[int32]*ExtensionDesc)
+
+// RegisterExtension is called from the generated code.
+func RegisterExtension(desc *ExtensionDesc) {
+	st := reflect.TypeOf(desc.ExtendedType).Elem()
+	m := extensionMaps[st]
+	if m == nil {
+		m = make(map[int32]*ExtensionDesc)
+		extensionMaps[st] = m
+	}
+	if _, ok := m[desc.Field]; ok {
+		panic("proto: duplicate extension registered: " + st.String() + " " + strconv.Itoa(int(desc.Field)))
+	}
+	m[desc.Field] = desc
+}
+
+// RegisteredExtensions returns a map of the registered extensions of a
+// protocol buffer struct, indexed by the extension number.
+// The argument pb should be a nil pointer to the struct type.
+func RegisteredExtensions(pb Message) map[int32]*ExtensionDesc {
+	return extensionMaps[reflect.TypeOf(pb).Elem()]
+}
diff --git a/vendor/github.com/golang/protobuf/proto/lib.go b/vendor/github.com/golang/protobuf/proto/lib.go
new file mode 100644
index 000000000..1c225504a
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/lib.go
@@ -0,0 +1,897 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2010 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+/*
+Package proto converts data structures to and from the wire format of
+protocol buffers.  It works in concert with the Go source code generated
+for .proto files by the protocol compiler.
+
+A summary of the properties of the protocol buffer interface
+for a protocol buffer variable v:
+
+  - Names are turned from camel_case to CamelCase for export.
+  - There are no methods on v to set fields; just treat
+	them as structure fields.
+  - There are getters that return a field's value if set,
+	and return the field's default value if unset.
+	The getters work even if the receiver is a nil message.
+  - The zero value for a struct is its correct initialization state.
+	All desired fields must be set before marshaling.
+  - A Reset() method will restore a protobuf struct to its zero state.
+  - Non-repeated fields are pointers to the values; nil means unset.
+	That is, optional or required field int32 f becomes F *int32.
+  - Repeated fields are slices.
+  - Helper functions are available to aid the setting of fields.
+	msg.Foo = proto.String("hello") // set field
+  - Constants are defined to hold the default values of all fields that
+	have them.  They have the form Default_StructName_FieldName.
+	Because the getter methods handle defaulted values,
+	direct use of these constants should be rare.
+  - Enums are given type names and maps from names to values.
+	Enum values are prefixed by the enclosing message's name, or by the
+	enum's type name if it is a top-level enum. Enum types have a String
+	method, and a Enum method to assist in message construction.
+  - Nested messages, groups and enums have type names prefixed with the name of
+	the surrounding message type.
+  - Extensions are given descriptor names that start with E_,
+	followed by an underscore-delimited list of the nested messages
+	that contain it (if any) followed by the CamelCased name of the
+	extension field itself.  HasExtension, ClearExtension, GetExtension
+	and SetExtension are functions for manipulating extensions.
+  - Oneof field sets are given a single field in their message,
+	with distinguished wrapper types for each possible field value.
+  - Marshal and Unmarshal are functions to encode and decode the wire format.
+
+When the .proto file specifies `syntax="proto3"`, there are some differences:
+
+  - Non-repeated fields of non-message type are values instead of pointers.
+  - Enum types do not get an Enum method.
+
+The simplest way to describe this is to see an example.
+Given file test.proto, containing
+
+	package example;
+
+	enum FOO { X = 17; }
+
+	message Test {
+	  required string label = 1;
+	  optional int32 type = 2 [default=77];
+	  repeated int64 reps = 3;
+	  optional group OptionalGroup = 4 {
+	    required string RequiredField = 5;
+	  }
+	  oneof union {
+	    int32 number = 6;
+	    string name = 7;
+	  }
+	}
+
+The resulting file, test.pb.go, is:
+
+	package example
+
+	import proto "github.com/golang/protobuf/proto"
+	import math "math"
+
+	type FOO int32
+	const (
+		FOO_X FOO = 17
+	)
+	var FOO_name = map[int32]string{
+		17: "X",
+	}
+	var FOO_value = map[string]int32{
+		"X": 17,
+	}
+
+	func (x FOO) Enum() *FOO {
+		p := new(FOO)
+		*p = x
+		return p
+	}
+	func (x FOO) String() string {
+		return proto.EnumName(FOO_name, int32(x))
+	}
+	func (x *FOO) UnmarshalJSON(data []byte) error {
+		value, err := proto.UnmarshalJSONEnum(FOO_value, data)
+		if err != nil {
+			return err
+		}
+		*x = FOO(value)
+		return nil
+	}
+
+	type Test struct {
+		Label         *string             `protobuf:"bytes,1,req,name=label" json:"label,omitempty"`
+		Type          *int32              `protobuf:"varint,2,opt,name=type,def=77" json:"type,omitempty"`
+		Reps          []int64             `protobuf:"varint,3,rep,name=reps" json:"reps,omitempty"`
+		Optionalgroup *Test_OptionalGroup `protobuf:"group,4,opt,name=OptionalGroup" json:"optionalgroup,omitempty"`
+		// Types that are valid to be assigned to Union:
+		//	*Test_Number
+		//	*Test_Name
+		Union            isTest_Union `protobuf_oneof:"union"`
+		XXX_unrecognized []byte       `json:"-"`
+	}
+	func (m *Test) Reset()         { *m = Test{} }
+	func (m *Test) String() string { return proto.CompactTextString(m) }
+	func (*Test) ProtoMessage() {}
+
+	type isTest_Union interface {
+		isTest_Union()
+	}
+
+	type Test_Number struct {
+		Number int32 `protobuf:"varint,6,opt,name=number"`
+	}
+	type Test_Name struct {
+		Name string `protobuf:"bytes,7,opt,name=name"`
+	}
+
+	func (*Test_Number) isTest_Union() {}
+	func (*Test_Name) isTest_Union()   {}
+
+	func (m *Test) GetUnion() isTest_Union {
+		if m != nil {
+			return m.Union
+		}
+		return nil
+	}
+	const Default_Test_Type int32 = 77
+
+	func (m *Test) GetLabel() string {
+		if m != nil && m.Label != nil {
+			return *m.Label
+		}
+		return ""
+	}
+
+	func (m *Test) GetType() int32 {
+		if m != nil && m.Type != nil {
+			return *m.Type
+		}
+		return Default_Test_Type
+	}
+
+	func (m *Test) GetOptionalgroup() *Test_OptionalGroup {
+		if m != nil {
+			return m.Optionalgroup
+		}
+		return nil
+	}
+
+	type Test_OptionalGroup struct {
+		RequiredField *string `protobuf:"bytes,5,req" json:"RequiredField,omitempty"`
+	}
+	func (m *Test_OptionalGroup) Reset()         { *m = Test_OptionalGroup{} }
+	func (m *Test_OptionalGroup) String() string { return proto.CompactTextString(m) }
+
+	func (m *Test_OptionalGroup) GetRequiredField() string {
+		if m != nil && m.RequiredField != nil {
+			return *m.RequiredField
+		}
+		return ""
+	}
+
+	func (m *Test) GetNumber() int32 {
+		if x, ok := m.GetUnion().(*Test_Number); ok {
+			return x.Number
+		}
+		return 0
+	}
+
+	func (m *Test) GetName() string {
+		if x, ok := m.GetUnion().(*Test_Name); ok {
+			return x.Name
+		}
+		return ""
+	}
+
+	func init() {
+		proto.RegisterEnum("example.FOO", FOO_name, FOO_value)
+	}
+
+To create and play with a Test object:
+
+	package main
+
+	import (
+		"log"
+
+		"github.com/golang/protobuf/proto"
+		pb "./example.pb"
+	)
+
+	func main() {
+		test := &pb.Test{
+			Label: proto.String("hello"),
+			Type:  proto.Int32(17),
+			Reps:  []int64{1, 2, 3},
+			Optionalgroup: &pb.Test_OptionalGroup{
+				RequiredField: proto.String("good bye"),
+			},
+			Union: &pb.Test_Name{"fred"},
+		}
+		data, err := proto.Marshal(test)
+		if err != nil {
+			log.Fatal("marshaling error: ", err)
+		}
+		newTest := &pb.Test{}
+		err = proto.Unmarshal(data, newTest)
+		if err != nil {
+			log.Fatal("unmarshaling error: ", err)
+		}
+		// Now test and newTest contain the same data.
+		if test.GetLabel() != newTest.GetLabel() {
+			log.Fatalf("data mismatch %q != %q", test.GetLabel(), newTest.GetLabel())
+		}
+		// Use a type switch to determine which oneof was set.
+		switch u := test.Union.(type) {
+		case *pb.Test_Number: // u.Number contains the number.
+		case *pb.Test_Name: // u.Name contains the string.
+		}
+		// etc.
+	}
+*/
+package proto
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"reflect"
+	"sort"
+	"strconv"
+	"sync"
+)
+
+// Message is implemented by generated protocol buffer messages.
+type Message interface {
+	Reset()
+	String() string
+	ProtoMessage()
+}
+
+// Stats records allocation details about the protocol buffer encoders
+// and decoders.  Useful for tuning the library itself.
+type Stats struct {
+	Emalloc uint64 // mallocs in encode
+	Dmalloc uint64 // mallocs in decode
+	Encode  uint64 // number of encodes
+	Decode  uint64 // number of decodes
+	Chit    uint64 // number of cache hits
+	Cmiss   uint64 // number of cache misses
+	Size    uint64 // number of sizes
+}
+
+// Set to true to enable stats collection.
+const collectStats = false
+
+var stats Stats
+
+// GetStats returns a copy of the global Stats structure.
+func GetStats() Stats { return stats }
+
+// A Buffer is a buffer manager for marshaling and unmarshaling
+// protocol buffers.  It may be reused between invocations to
+// reduce memory usage.  It is not necessary to use a Buffer;
+// the global functions Marshal and Unmarshal create a
+// temporary Buffer and are fine for most applications.
+type Buffer struct {
+	buf   []byte // encode/decode byte stream
+	index int    // read point
+
+	// pools of basic types to amortize allocation.
+	bools   []bool
+	uint32s []uint32
+	uint64s []uint64
+
+	// extra pools, only used with pointer_reflect.go
+	int32s   []int32
+	int64s   []int64
+	float32s []float32
+	float64s []float64
+}
+
+// NewBuffer allocates a new Buffer and initializes its internal data to
+// the contents of the argument slice.
+func NewBuffer(e []byte) *Buffer {
+	return &Buffer{buf: e}
+}
+
+// Reset resets the Buffer, ready for marshaling a new protocol buffer.
+func (p *Buffer) Reset() {
+	p.buf = p.buf[0:0] // for reading/writing
+	p.index = 0        // for reading
+}
+
+// SetBuf replaces the internal buffer with the slice,
+// ready for unmarshaling the contents of the slice.
+func (p *Buffer) SetBuf(s []byte) {
+	p.buf = s
+	p.index = 0
+}
+
+// Bytes returns the contents of the Buffer.
+func (p *Buffer) Bytes() []byte { return p.buf }
+
+/*
+ * Helper routines for simplifying the creation of optional fields of basic type.
+ */
+
+// Bool is a helper routine that allocates a new bool value
+// to store v and returns a pointer to it.
+func Bool(v bool) *bool {
+	return &v
+}
+
+// Int32 is a helper routine that allocates a new int32 value
+// to store v and returns a pointer to it.
+func Int32(v int32) *int32 {
+	return &v
+}
+
+// Int is a helper routine that allocates a new int32 value
+// to store v and returns a pointer to it, but unlike Int32
+// its argument value is an int.
+func Int(v int) *int32 {
+	p := new(int32)
+	*p = int32(v)
+	return p
+}
+
+// Int64 is a helper routine that allocates a new int64 value
+// to store v and returns a pointer to it.
+func Int64(v int64) *int64 {
+	return &v
+}
+
+// Float32 is a helper routine that allocates a new float32 value
+// to store v and returns a pointer to it.
+func Float32(v float32) *float32 {
+	return &v
+}
+
+// Float64 is a helper routine that allocates a new float64 value
+// to store v and returns a pointer to it.
+func Float64(v float64) *float64 {
+	return &v
+}
+
+// Uint32 is a helper routine that allocates a new uint32 value
+// to store v and returns a pointer to it.
+func Uint32(v uint32) *uint32 {
+	return &v
+}
+
+// Uint64 is a helper routine that allocates a new uint64 value
+// to store v and returns a pointer to it.
+func Uint64(v uint64) *uint64 {
+	return &v
+}
+
+// String is a helper routine that allocates a new string value
+// to store v and returns a pointer to it.
+func String(v string) *string {
+	return &v
+}
+
+// EnumName is a helper function to simplify printing protocol buffer enums
+// by name.  Given an enum map and a value, it returns a useful string.
+func EnumName(m map[int32]string, v int32) string {
+	s, ok := m[v]
+	if ok {
+		return s
+	}
+	return strconv.Itoa(int(v))
+}
+
+// UnmarshalJSONEnum is a helper function to simplify recovering enum int values
+// from their JSON-encoded representation. Given a map from the enum's symbolic
+// names to its int values, and a byte buffer containing the JSON-encoded
+// value, it returns an int32 that can be cast to the enum type by the caller.
+//
+// The function can deal with both JSON representations, numeric and symbolic.
+func UnmarshalJSONEnum(m map[string]int32, data []byte, enumName string) (int32, error) {
+	if data[0] == '"' {
+		// New style: enums are strings.
+		var repr string
+		if err := json.Unmarshal(data, &repr); err != nil {
+			return -1, err
+		}
+		val, ok := m[repr]
+		if !ok {
+			return 0, fmt.Errorf("unrecognized enum %s value %q", enumName, repr)
+		}
+		return val, nil
+	}
+	// Old style: enums are ints.
+	var val int32
+	if err := json.Unmarshal(data, &val); err != nil {
+		return 0, fmt.Errorf("cannot unmarshal %#q into enum %s", data, enumName)
+	}
+	return val, nil
+}
+
+// DebugPrint dumps the encoded data in b in a debugging format with a header
+// including the string s. Used in testing but made available for general debugging.
+func (p *Buffer) DebugPrint(s string, b []byte) {
+	var u uint64
+
+	obuf := p.buf
+	index := p.index
+	p.buf = b
+	p.index = 0
+	depth := 0
+
+	fmt.Printf("\n--- %s ---\n", s)
+
+out:
+	for {
+		for i := 0; i < depth; i++ {
+			fmt.Print("  ")
+		}
+
+		index := p.index
+		if index == len(p.buf) {
+			break
+		}
+
+		op, err := p.DecodeVarint()
+		if err != nil {
+			fmt.Printf("%3d: fetching op err %v\n", index, err)
+			break out
+		}
+		tag := op >> 3
+		wire := op & 7
+
+		switch wire {
+		default:
+			fmt.Printf("%3d: t=%3d unknown wire=%d\n",
+				index, tag, wire)
+			break out
+
+		case WireBytes:
+			var r []byte
+
+			r, err = p.DecodeRawBytes(false)
+			if err != nil {
+				break out
+			}
+			fmt.Printf("%3d: t=%3d bytes [%d]", index, tag, len(r))
+			if len(r) <= 6 {
+				for i := 0; i < len(r); i++ {
+					fmt.Printf(" %.2x", r[i])
+				}
+			} else {
+				for i := 0; i < 3; i++ {
+					fmt.Printf(" %.2x", r[i])
+				}
+				fmt.Printf(" ..")
+				for i := len(r) - 3; i < len(r); i++ {
+					fmt.Printf(" %.2x", r[i])
+				}
+			}
+			fmt.Printf("\n")
+
+		case WireFixed32:
+			u, err = p.DecodeFixed32()
+			if err != nil {
+				fmt.Printf("%3d: t=%3d fix32 err %v\n", index, tag, err)
+				break out
+			}
+			fmt.Printf("%3d: t=%3d fix32 %d\n", index, tag, u)
+
+		case WireFixed64:
+			u, err = p.DecodeFixed64()
+			if err != nil {
+				fmt.Printf("%3d: t=%3d fix64 err %v\n", index, tag, err)
+				break out
+			}
+			fmt.Printf("%3d: t=%3d fix64 %d\n", index, tag, u)
+
+		case WireVarint:
+			u, err = p.DecodeVarint()
+			if err != nil {
+				fmt.Printf("%3d: t=%3d varint err %v\n", index, tag, err)
+				break out
+			}
+			fmt.Printf("%3d: t=%3d varint %d\n", index, tag, u)
+
+		case WireStartGroup:
+			fmt.Printf("%3d: t=%3d start\n", index, tag)
+			depth++
+
+		case WireEndGroup:
+			depth--
+			fmt.Printf("%3d: t=%3d end\n", index, tag)
+		}
+	}
+
+	if depth != 0 {
+		fmt.Printf("%3d: start-end not balanced %d\n", p.index, depth)
+	}
+	fmt.Printf("\n")
+
+	p.buf = obuf
+	p.index = index
+}
+
+// SetDefaults sets unset protocol buffer fields to their default values.
+// It only modifies fields that are both unset and have defined defaults.
+// It recursively sets default values in any non-nil sub-messages.
+func SetDefaults(pb Message) {
+	setDefaults(reflect.ValueOf(pb), true, false)
+}
+
+// v is a pointer to a struct.
+func setDefaults(v reflect.Value, recur, zeros bool) {
+	v = v.Elem()
+
+	defaultMu.RLock()
+	dm, ok := defaults[v.Type()]
+	defaultMu.RUnlock()
+	if !ok {
+		dm = buildDefaultMessage(v.Type())
+		defaultMu.Lock()
+		defaults[v.Type()] = dm
+		defaultMu.Unlock()
+	}
+
+	for _, sf := range dm.scalars {
+		f := v.Field(sf.index)
+		if !f.IsNil() {
+			// field already set
+			continue
+		}
+		dv := sf.value
+		if dv == nil && !zeros {
+			// no explicit default, and don't want to set zeros
+			continue
+		}
+		fptr := f.Addr().Interface() // **T
+		// TODO: Consider batching the allocations we do here.
+		switch sf.kind {
+		case reflect.Bool:
+			b := new(bool)
+			if dv != nil {
+				*b = dv.(bool)
+			}
+			*(fptr.(**bool)) = b
+		case reflect.Float32:
+			f := new(float32)
+			if dv != nil {
+				*f = dv.(float32)
+			}
+			*(fptr.(**float32)) = f
+		case reflect.Float64:
+			f := new(float64)
+			if dv != nil {
+				*f = dv.(float64)
+			}
+			*(fptr.(**float64)) = f
+		case reflect.Int32:
+			// might be an enum
+			if ft := f.Type(); ft != int32PtrType {
+				// enum
+				f.Set(reflect.New(ft.Elem()))
+				if dv != nil {
+					f.Elem().SetInt(int64(dv.(int32)))
+				}
+			} else {
+				// int32 field
+				i := new(int32)
+				if dv != nil {
+					*i = dv.(int32)
+				}
+				*(fptr.(**int32)) = i
+			}
+		case reflect.Int64:
+			i := new(int64)
+			if dv != nil {
+				*i = dv.(int64)
+			}
+			*(fptr.(**int64)) = i
+		case reflect.String:
+			s := new(string)
+			if dv != nil {
+				*s = dv.(string)
+			}
+			*(fptr.(**string)) = s
+		case reflect.Uint8:
+			// exceptional case: []byte
+			var b []byte
+			if dv != nil {
+				db := dv.([]byte)
+				b = make([]byte, len(db))
+				copy(b, db)
+			} else {
+				b = []byte{}
+			}
+			*(fptr.(*[]byte)) = b
+		case reflect.Uint32:
+			u := new(uint32)
+			if dv != nil {
+				*u = dv.(uint32)
+			}
+			*(fptr.(**uint32)) = u
+		case reflect.Uint64:
+			u := new(uint64)
+			if dv != nil {
+				*u = dv.(uint64)
+			}
+			*(fptr.(**uint64)) = u
+		default:
+			log.Printf("proto: can't set default for field %v (sf.kind=%v)", f, sf.kind)
+		}
+	}
+
+	for _, ni := range dm.nested {
+		f := v.Field(ni)
+		// f is *T or []*T or map[T]*T
+		switch f.Kind() {
+		case reflect.Ptr:
+			if f.IsNil() {
+				continue
+			}
+			setDefaults(f, recur, zeros)
+
+		case reflect.Slice:
+			for i := 0; i < f.Len(); i++ {
+				e := f.Index(i)
+				if e.IsNil() {
+					continue
+				}
+				setDefaults(e, recur, zeros)
+			}
+
+		case reflect.Map:
+			for _, k := range f.MapKeys() {
+				e := f.MapIndex(k)
+				if e.IsNil() {
+					continue
+				}
+				setDefaults(e, recur, zeros)
+			}
+		}
+	}
+}
+
+var (
+	// defaults maps a protocol buffer struct type to a slice of the fields,
+	// with its scalar fields set to their proto-declared non-zero default values.
+	defaultMu sync.RWMutex
+	defaults  = make(map[reflect.Type]defaultMessage)
+
+	int32PtrType = reflect.TypeOf((*int32)(nil))
+)
+
+// defaultMessage represents information about the default values of a message.
+type defaultMessage struct {
+	scalars []scalarField
+	nested  []int // struct field index of nested messages
+}
+
+type scalarField struct {
+	index int          // struct field index
+	kind  reflect.Kind // element type (the T in *T or []T)
+	value interface{}  // the proto-declared default value, or nil
+}
+
+// t is a struct type.
+func buildDefaultMessage(t reflect.Type) (dm defaultMessage) {
+	sprop := GetProperties(t)
+	for _, prop := range sprop.Prop {
+		fi, ok := sprop.decoderTags.get(prop.Tag)
+		if !ok {
+			// XXX_unrecognized
+			continue
+		}
+		ft := t.Field(fi).Type
+
+		sf, nested, err := fieldDefault(ft, prop)
+		switch {
+		case err != nil:
+			log.Print(err)
+		case nested:
+			dm.nested = append(dm.nested, fi)
+		case sf != nil:
+			sf.index = fi
+			dm.scalars = append(dm.scalars, *sf)
+		}
+	}
+
+	return dm
+}
+
+// fieldDefault returns the scalarField for field type ft.
+// sf will be nil if the field can not have a default.
+// nestedMessage will be true if this is a nested message.
+// Note that sf.index is not set on return.
+func fieldDefault(ft reflect.Type, prop *Properties) (sf *scalarField, nestedMessage bool, err error) {
+	var canHaveDefault bool
+	switch ft.Kind() {
+	case reflect.Ptr:
+		if ft.Elem().Kind() == reflect.Struct {
+			nestedMessage = true
+		} else {
+			canHaveDefault = true // proto2 scalar field
+		}
+
+	case reflect.Slice:
+		switch ft.Elem().Kind() {
+		case reflect.Ptr:
+			nestedMessage = true // repeated message
+		case reflect.Uint8:
+			canHaveDefault = true // bytes field
+		}
+
+	case reflect.Map:
+		if ft.Elem().Kind() == reflect.Ptr {
+			nestedMessage = true // map with message values
+		}
+	}
+
+	if !canHaveDefault {
+		if nestedMessage {
+			return nil, true, nil
+		}
+		return nil, false, nil
+	}
+
+	// We now know that ft is a pointer or slice.
+	sf = &scalarField{kind: ft.Elem().Kind()}
+
+	// scalar fields without defaults
+	if !prop.HasDefault {
+		return sf, false, nil
+	}
+
+	// a scalar field: either *T or []byte
+	switch ft.Elem().Kind() {
+	case reflect.Bool:
+		x, err := strconv.ParseBool(prop.Default)
+		if err != nil {
+			return nil, false, fmt.Errorf("proto: bad default bool %q: %v", prop.Default, err)
+		}
+		sf.value = x
+	case reflect.Float32:
+		x, err := strconv.ParseFloat(prop.Default, 32)
+		if err != nil {
+			return nil, false, fmt.Errorf("proto: bad default float32 %q: %v", prop.Default, err)
+		}
+		sf.value = float32(x)
+	case reflect.Float64:
+		x, err := strconv.ParseFloat(prop.Default, 64)
+		if err != nil {
+			return nil, false, fmt.Errorf("proto: bad default float64 %q: %v", prop.Default, err)
+		}
+		sf.value = x
+	case reflect.Int32:
+		x, err := strconv.ParseInt(prop.Default, 10, 32)
+		if err != nil {
+			return nil, false, fmt.Errorf("proto: bad default int32 %q: %v", prop.Default, err)
+		}
+		sf.value = int32(x)
+	case reflect.Int64:
+		x, err := strconv.ParseInt(prop.Default, 10, 64)
+		if err != nil {
+			return nil, false, fmt.Errorf("proto: bad default int64 %q: %v", prop.Default, err)
+		}
+		sf.value = x
+	case reflect.String:
+		sf.value = prop.Default
+	case reflect.Uint8:
+		// []byte (not *uint8)
+		sf.value = []byte(prop.Default)
+	case reflect.Uint32:
+		x, err := strconv.ParseUint(prop.Default, 10, 32)
+		if err != nil {
+			return nil, false, fmt.Errorf("proto: bad default uint32 %q: %v", prop.Default, err)
+		}
+		sf.value = uint32(x)
+	case reflect.Uint64:
+		x, err := strconv.ParseUint(prop.Default, 10, 64)
+		if err != nil {
+			return nil, false, fmt.Errorf("proto: bad default uint64 %q: %v", prop.Default, err)
+		}
+		sf.value = x
+	default:
+		return nil, false, fmt.Errorf("proto: unhandled def kind %v", ft.Elem().Kind())
+	}
+
+	return sf, false, nil
+}
+
+// Map fields may have key types of non-float scalars, strings and enums.
+// The easiest way to sort them in some deterministic order is to use fmt.
+// If this turns out to be inefficient we can always consider other options,
+// such as doing a Schwartzian transform.
+
+func mapKeys(vs []reflect.Value) sort.Interface {
+	s := mapKeySorter{
+		vs: vs,
+		// default Less function: textual comparison
+		less: func(a, b reflect.Value) bool {
+			return fmt.Sprint(a.Interface()) < fmt.Sprint(b.Interface())
+		},
+	}
+
+	// Type specialization per https://developers.google.com/protocol-buffers/docs/proto#maps;
+	// numeric keys are sorted numerically.
+	if len(vs) == 0 {
+		return s
+	}
+	switch vs[0].Kind() {
+	case reflect.Int32, reflect.Int64:
+		s.less = func(a, b reflect.Value) bool { return a.Int() < b.Int() }
+	case reflect.Uint32, reflect.Uint64:
+		s.less = func(a, b reflect.Value) bool { return a.Uint() < b.Uint() }
+	}
+
+	return s
+}
+
+type mapKeySorter struct {
+	vs   []reflect.Value
+	less func(a, b reflect.Value) bool
+}
+
+func (s mapKeySorter) Len() int      { return len(s.vs) }
+func (s mapKeySorter) Swap(i, j int) { s.vs[i], s.vs[j] = s.vs[j], s.vs[i] }
+func (s mapKeySorter) Less(i, j int) bool {
+	return s.less(s.vs[i], s.vs[j])
+}
+
+// isProto3Zero reports whether v is a zero proto3 value.
+func isProto3Zero(v reflect.Value) bool {
+	switch v.Kind() {
+	case reflect.Bool:
+		return !v.Bool()
+	case reflect.Int32, reflect.Int64:
+		return v.Int() == 0
+	case reflect.Uint32, reflect.Uint64:
+		return v.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return v.Float() == 0
+	case reflect.String:
+		return v.String() == ""
+	}
+	return false
+}
+
+// ProtoPackageIsVersion2 is referenced from generated protocol buffer files
+// to assert that that code is compatible with this version of the proto package.
+const ProtoPackageIsVersion2 = true
+
+// ProtoPackageIsVersion1 is referenced from generated protocol buffer files
+// to assert that that code is compatible with this version of the proto package.
+const ProtoPackageIsVersion1 = true
diff --git a/vendor/github.com/golang/protobuf/proto/message_set.go b/vendor/github.com/golang/protobuf/proto/message_set.go
new file mode 100644
index 000000000..fd982decd
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/message_set.go
@@ -0,0 +1,311 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2010 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package proto
+
+/*
+ * Support for message sets.
+ */
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"reflect"
+	"sort"
+)
+
+// errNoMessageTypeID occurs when a protocol buffer does not have a message type ID.
+// A message type ID is required for storing a protocol buffer in a message set.
+var errNoMessageTypeID = errors.New("proto does not have a message type ID")
+
+// The first two types (_MessageSet_Item and messageSet)
+// model what the protocol compiler produces for the following protocol message:
+//   message MessageSet {
+//     repeated group Item = 1 {
+//       required int32 type_id = 2;
+//       required string message = 3;
+//     };
+//   }
+// That is the MessageSet wire format. We can't use a proto to generate these
+// because that would introduce a circular dependency between it and this package.
+
+type _MessageSet_Item struct {
+	TypeId  *int32 `protobuf:"varint,2,req,name=type_id"`
+	Message []byte `protobuf:"bytes,3,req,name=message"`
+}
+
+type messageSet struct {
+	Item             []*_MessageSet_Item `protobuf:"group,1,rep"`
+	XXX_unrecognized []byte
+	// TODO: caching?
+}
+
+// Make sure messageSet is a Message.
+var _ Message = (*messageSet)(nil)
+
+// messageTypeIder is an interface satisfied by a protocol buffer type
+// that may be stored in a MessageSet.
+type messageTypeIder interface {
+	MessageTypeId() int32
+}
+
+func (ms *messageSet) find(pb Message) *_MessageSet_Item {
+	mti, ok := pb.(messageTypeIder)
+	if !ok {
+		return nil
+	}
+	id := mti.MessageTypeId()
+	for _, item := range ms.Item {
+		if *item.TypeId == id {
+			return item
+		}
+	}
+	return nil
+}
+
+func (ms *messageSet) Has(pb Message) bool {
+	if ms.find(pb) != nil {
+		return true
+	}
+	return false
+}
+
+func (ms *messageSet) Unmarshal(pb Message) error {
+	if item := ms.find(pb); item != nil {
+		return Unmarshal(item.Message, pb)
+	}
+	if _, ok := pb.(messageTypeIder); !ok {
+		return errNoMessageTypeID
+	}
+	return nil // TODO: return error instead?
+}
+
+func (ms *messageSet) Marshal(pb Message) error {
+	msg, err := Marshal(pb)
+	if err != nil {
+		return err
+	}
+	if item := ms.find(pb); item != nil {
+		// reuse existing item
+		item.Message = msg
+		return nil
+	}
+
+	mti, ok := pb.(messageTypeIder)
+	if !ok {
+		return errNoMessageTypeID
+	}
+
+	mtid := mti.MessageTypeId()
+	ms.Item = append(ms.Item, &_MessageSet_Item{
+		TypeId:  &mtid,
+		Message: msg,
+	})
+	return nil
+}
+
+func (ms *messageSet) Reset()         { *ms = messageSet{} }
+func (ms *messageSet) String() string { return CompactTextString(ms) }
+func (*messageSet) ProtoMessage()     {}
+
+// Support for the message_set_wire_format message option.
+
+func skipVarint(buf []byte) []byte {
+	i := 0
+	for ; buf[i]&0x80 != 0; i++ {
+	}
+	return buf[i+1:]
+}
+
+// MarshalMessageSet encodes the extension map represented by m in the message set wire format.
+// It is called by generated Marshal methods on protocol buffer messages with the message_set_wire_format option.
+func MarshalMessageSet(exts interface{}) ([]byte, error) {
+	var m map[int32]Extension
+	switch exts := exts.(type) {
+	case *XXX_InternalExtensions:
+		if err := encodeExtensions(exts); err != nil {
+			return nil, err
+		}
+		m, _ = exts.extensionsRead()
+	case map[int32]Extension:
+		if err := encodeExtensionsMap(exts); err != nil {
+			return nil, err
+		}
+		m = exts
+	default:
+		return nil, errors.New("proto: not an extension map")
+	}
+
+	// Sort extension IDs to provide a deterministic encoding.
+	// See also enc_map in encode.go.
+	ids := make([]int, 0, len(m))
+	for id := range m {
+		ids = append(ids, int(id))
+	}
+	sort.Ints(ids)
+
+	ms := &messageSet{Item: make([]*_MessageSet_Item, 0, len(m))}
+	for _, id := range ids {
+		e := m[int32(id)]
+		// Remove the wire type and field number varint, as well as the length varint.
+		msg := skipVarint(skipVarint(e.enc))
+
+		ms.Item = append(ms.Item, &_MessageSet_Item{
+			TypeId:  Int32(int32(id)),
+			Message: msg,
+		})
+	}
+	return Marshal(ms)
+}
+
+// UnmarshalMessageSet decodes the extension map encoded in buf in the message set wire format.
+// It is called by generated Unmarshal methods on protocol buffer messages with the message_set_wire_format option.
+func UnmarshalMessageSet(buf []byte, exts interface{}) error {
+	var m map[int32]Extension
+	switch exts := exts.(type) {
+	case *XXX_InternalExtensions:
+		m = exts.extensionsWrite()
+	case map[int32]Extension:
+		m = exts
+	default:
+		return errors.New("proto: not an extension map")
+	}
+
+	ms := new(messageSet)
+	if err := Unmarshal(buf, ms); err != nil {
+		return err
+	}
+	for _, item := range ms.Item {
+		id := *item.TypeId
+		msg := item.Message
+
+		// Restore wire type and field number varint, plus length varint.
+		// Be careful to preserve duplicate items.
+		b := EncodeVarint(uint64(id)<<3 | WireBytes)
+		if ext, ok := m[id]; ok {
+			// Existing data; rip off the tag and length varint
+			// so we join the new data correctly.
+			// We can assume that ext.enc is set because we are unmarshaling.
+			o := ext.enc[len(b):]   // skip wire type and field number
+			_, n := DecodeVarint(o) // calculate length of length varint
+			o = o[n:]               // skip length varint
+			msg = append(o, msg...) // join old data and new data
+		}
+		b = append(b, EncodeVarint(uint64(len(msg)))...)
+		b = append(b, msg...)
+
+		m[id] = Extension{enc: b}
+	}
+	return nil
+}
+
+// MarshalMessageSetJSON encodes the extension map represented by m in JSON format.
+// It is called by generated MarshalJSON methods on protocol buffer messages with the message_set_wire_format option.
+func MarshalMessageSetJSON(exts interface{}) ([]byte, error) {
+	var m map[int32]Extension
+	switch exts := exts.(type) {
+	case *XXX_InternalExtensions:
+		m, _ = exts.extensionsRead()
+	case map[int32]Extension:
+		m = exts
+	default:
+		return nil, errors.New("proto: not an extension map")
+	}
+	var b bytes.Buffer
+	b.WriteByte('{')
+
+	// Process the map in key order for deterministic output.
+	ids := make([]int32, 0, len(m))
+	for id := range m {
+		ids = append(ids, id)
+	}
+	sort.Sort(int32Slice(ids)) // int32Slice defined in text.go
+
+	for i, id := range ids {
+		ext := m[id]
+		if i > 0 {
+			b.WriteByte(',')
+		}
+
+		msd, ok := messageSetMap[id]
+		if !ok {
+			// Unknown type; we can't render it, so skip it.
+			continue
+		}
+		fmt.Fprintf(&b, `"[%s]":`, msd.name)
+
+		x := ext.value
+		if x == nil {
+			x = reflect.New(msd.t.Elem()).Interface()
+			if err := Unmarshal(ext.enc, x.(Message)); err != nil {
+				return nil, err
+			}
+		}
+		d, err := json.Marshal(x)
+		if err != nil {
+			return nil, err
+		}
+		b.Write(d)
+	}
+	b.WriteByte('}')
+	return b.Bytes(), nil
+}
+
+// UnmarshalMessageSetJSON decodes the extension map encoded in buf in JSON format.
+// It is called by generated UnmarshalJSON methods on protocol buffer messages with the message_set_wire_format option.
+func UnmarshalMessageSetJSON(buf []byte, exts interface{}) error {
+	// Common-case fast path.
+	if len(buf) == 0 || bytes.Equal(buf, []byte("{}")) {
+		return nil
+	}
+
+	// This is fairly tricky, and it's not clear that it is needed.
+	return errors.New("TODO: UnmarshalMessageSetJSON not yet implemented")
+}
+
+// A global registry of types that can be used in a MessageSet.
+
+var messageSetMap = make(map[int32]messageSetDesc)
+
+type messageSetDesc struct {
+	t    reflect.Type // pointer to struct
+	name string
+}
+
+// RegisterMessageSetType is called from the generated code.
+func RegisterMessageSetType(m Message, fieldNum int32, name string) {
+	messageSetMap[fieldNum] = messageSetDesc{
+		t:    reflect.TypeOf(m),
+		name: name,
+	}
+}
diff --git a/vendor/github.com/golang/protobuf/proto/pointer_reflect.go b/vendor/github.com/golang/protobuf/proto/pointer_reflect.go
new file mode 100644
index 000000000..fb512e2e1
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/pointer_reflect.go
@@ -0,0 +1,484 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2012 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// +build appengine js
+
+// This file contains an implementation of proto field accesses using package reflect.
+// It is slower than the code in pointer_unsafe.go but it avoids package unsafe and can
+// be used on App Engine.
+
+package proto
+
+import (
+	"math"
+	"reflect"
+)
+
+// A structPointer is a pointer to a struct.
+type structPointer struct {
+	v reflect.Value
+}
+
+// toStructPointer returns a structPointer equivalent to the given reflect value.
+// The reflect value must itself be a pointer to a struct.
+func toStructPointer(v reflect.Value) structPointer {
+	return structPointer{v}
+}
+
+// IsNil reports whether p is nil.
+func structPointer_IsNil(p structPointer) bool {
+	return p.v.IsNil()
+}
+
+// Interface returns the struct pointer as an interface value.
+func structPointer_Interface(p structPointer, _ reflect.Type) interface{} {
+	return p.v.Interface()
+}
+
+// A field identifies a field in a struct, accessible from a structPointer.
+// In this implementation, a field is identified by the sequence of field indices
+// passed to reflect's FieldByIndex.
+type field []int
+
+// toField returns a field equivalent to the given reflect field.
+func toField(f *reflect.StructField) field {
+	return f.Index
+}
+
+// invalidField is an invalid field identifier.
+var invalidField = field(nil)
+
+// IsValid reports whether the field identifier is valid.
+func (f field) IsValid() bool { return f != nil }
+
+// field returns the given field in the struct as a reflect value.
+func structPointer_field(p structPointer, f field) reflect.Value {
+	// Special case: an extension map entry with a value of type T
+	// passes a *T to the struct-handling code with a zero field,
+	// expecting that it will be treated as equivalent to *struct{ X T },
+	// which has the same memory layout. We have to handle that case
+	// specially, because reflect will panic if we call FieldByIndex on a
+	// non-struct.
+	if f == nil {
+		return p.v.Elem()
+	}
+
+	return p.v.Elem().FieldByIndex(f)
+}
+
+// ifield returns the given field in the struct as an interface value.
+func structPointer_ifield(p structPointer, f field) interface{} {
+	return structPointer_field(p, f).Addr().Interface()
+}
+
+// Bytes returns the address of a []byte field in the struct.
+func structPointer_Bytes(p structPointer, f field) *[]byte {
+	return structPointer_ifield(p, f).(*[]byte)
+}
+
+// BytesSlice returns the address of a [][]byte field in the struct.
+func structPointer_BytesSlice(p structPointer, f field) *[][]byte {
+	return structPointer_ifield(p, f).(*[][]byte)
+}
+
+// Bool returns the address of a *bool field in the struct.
+func structPointer_Bool(p structPointer, f field) **bool {
+	return structPointer_ifield(p, f).(**bool)
+}
+
+// BoolVal returns the address of a bool field in the struct.
+func structPointer_BoolVal(p structPointer, f field) *bool {
+	return structPointer_ifield(p, f).(*bool)
+}
+
+// BoolSlice returns the address of a []bool field in the struct.
+func structPointer_BoolSlice(p structPointer, f field) *[]bool {
+	return structPointer_ifield(p, f).(*[]bool)
+}
+
+// String returns the address of a *string field in the struct.
+func structPointer_String(p structPointer, f field) **string {
+	return structPointer_ifield(p, f).(**string)
+}
+
+// StringVal returns the address of a string field in the struct.
+func structPointer_StringVal(p structPointer, f field) *string {
+	return structPointer_ifield(p, f).(*string)
+}
+
+// StringSlice returns the address of a []string field in the struct.
+func structPointer_StringSlice(p structPointer, f field) *[]string {
+	return structPointer_ifield(p, f).(*[]string)
+}
+
+// Extensions returns the address of an extension map field in the struct.
+func structPointer_Extensions(p structPointer, f field) *XXX_InternalExtensions {
+	return structPointer_ifield(p, f).(*XXX_InternalExtensions)
+}
+
+// ExtMap returns the address of an extension map field in the struct.
+func structPointer_ExtMap(p structPointer, f field) *map[int32]Extension {
+	return structPointer_ifield(p, f).(*map[int32]Extension)
+}
+
+// NewAt returns the reflect.Value for a pointer to a field in the struct.
+func structPointer_NewAt(p structPointer, f field, typ reflect.Type) reflect.Value {
+	return structPointer_field(p, f).Addr()
+}
+
+// SetStructPointer writes a *struct field in the struct.
+func structPointer_SetStructPointer(p structPointer, f field, q structPointer) {
+	structPointer_field(p, f).Set(q.v)
+}
+
+// GetStructPointer reads a *struct field in the struct.
+func structPointer_GetStructPointer(p structPointer, f field) structPointer {
+	return structPointer{structPointer_field(p, f)}
+}
+
+// StructPointerSlice the address of a []*struct field in the struct.
+func structPointer_StructPointerSlice(p structPointer, f field) structPointerSlice {
+	return structPointerSlice{structPointer_field(p, f)}
+}
+
+// A structPointerSlice represents the address of a slice of pointers to structs
+// (themselves messages or groups). That is, v.Type() is *[]*struct{...}.
+type structPointerSlice struct {
+	v reflect.Value
+}
+
+func (p structPointerSlice) Len() int                  { return p.v.Len() }
+func (p structPointerSlice) Index(i int) structPointer { return structPointer{p.v.Index(i)} }
+func (p structPointerSlice) Append(q structPointer) {
+	p.v.Set(reflect.Append(p.v, q.v))
+}
+
+var (
+	int32Type   = reflect.TypeOf(int32(0))
+	uint32Type  = reflect.TypeOf(uint32(0))
+	float32Type = reflect.TypeOf(float32(0))
+	int64Type   = reflect.TypeOf(int64(0))
+	uint64Type  = reflect.TypeOf(uint64(0))
+	float64Type = reflect.TypeOf(float64(0))
+)
+
+// A word32 represents a field of type *int32, *uint32, *float32, or *enum.
+// That is, v.Type() is *int32, *uint32, *float32, or *enum and v is assignable.
+type word32 struct {
+	v reflect.Value
+}
+
+// IsNil reports whether p is nil.
+func word32_IsNil(p word32) bool {
+	return p.v.IsNil()
+}
+
+// Set sets p to point at a newly allocated word with bits set to x.
+func word32_Set(p word32, o *Buffer, x uint32) {
+	t := p.v.Type().Elem()
+	switch t {
+	case int32Type:
+		if len(o.int32s) == 0 {
+			o.int32s = make([]int32, uint32PoolSize)
+		}
+		o.int32s[0] = int32(x)
+		p.v.Set(reflect.ValueOf(&o.int32s[0]))
+		o.int32s = o.int32s[1:]
+		return
+	case uint32Type:
+		if len(o.uint32s) == 0 {
+			o.uint32s = make([]uint32, uint32PoolSize)
+		}
+		o.uint32s[0] = x
+		p.v.Set(reflect.ValueOf(&o.uint32s[0]))
+		o.uint32s = o.uint32s[1:]
+		return
+	case float32Type:
+		if len(o.float32s) == 0 {
+			o.float32s = make([]float32, uint32PoolSize)
+		}
+		o.float32s[0] = math.Float32frombits(x)
+		p.v.Set(reflect.ValueOf(&o.float32s[0]))
+		o.float32s = o.float32s[1:]
+		return
+	}
+
+	// must be enum
+	p.v.Set(reflect.New(t))
+	p.v.Elem().SetInt(int64(int32(x)))
+}
+
+// Get gets the bits pointed at by p, as a uint32.
+func word32_Get(p word32) uint32 {
+	elem := p.v.Elem()
+	switch elem.Kind() {
+	case reflect.Int32:
+		return uint32(elem.Int())
+	case reflect.Uint32:
+		return uint32(elem.Uint())
+	case reflect.Float32:
+		return math.Float32bits(float32(elem.Float()))
+	}
+	panic("unreachable")
+}
+
+// Word32 returns a reference to a *int32, *uint32, *float32, or *enum field in the struct.
+func structPointer_Word32(p structPointer, f field) word32 {
+	return word32{structPointer_field(p, f)}
+}
+
+// A word32Val represents a field of type int32, uint32, float32, or enum.
+// That is, v.Type() is int32, uint32, float32, or enum and v is assignable.
+type word32Val struct {
+	v reflect.Value
+}
+
+// Set sets *p to x.
+func word32Val_Set(p word32Val, x uint32) {
+	switch p.v.Type() {
+	case int32Type:
+		p.v.SetInt(int64(x))
+		return
+	case uint32Type:
+		p.v.SetUint(uint64(x))
+		return
+	case float32Type:
+		p.v.SetFloat(float64(math.Float32frombits(x)))
+		return
+	}
+
+	// must be enum
+	p.v.SetInt(int64(int32(x)))
+}
+
+// Get gets the bits pointed at by p, as a uint32.
+func word32Val_Get(p word32Val) uint32 {
+	elem := p.v
+	switch elem.Kind() {
+	case reflect.Int32:
+		return uint32(elem.Int())
+	case reflect.Uint32:
+		return uint32(elem.Uint())
+	case reflect.Float32:
+		return math.Float32bits(float32(elem.Float()))
+	}
+	panic("unreachable")
+}
+
+// Word32Val returns a reference to a int32, uint32, float32, or enum field in the struct.
+func structPointer_Word32Val(p structPointer, f field) word32Val {
+	return word32Val{structPointer_field(p, f)}
+}
+
+// A word32Slice is a slice of 32-bit values.
+// That is, v.Type() is []int32, []uint32, []float32, or []enum.
+type word32Slice struct {
+	v reflect.Value
+}
+
+func (p word32Slice) Append(x uint32) {
+	n, m := p.v.Len(), p.v.Cap()
+	if n < m {
+		p.v.SetLen(n + 1)
+	} else {
+		t := p.v.Type().Elem()
+		p.v.Set(reflect.Append(p.v, reflect.Zero(t)))
+	}
+	elem := p.v.Index(n)
+	switch elem.Kind() {
+	case reflect.Int32:
+		elem.SetInt(int64(int32(x)))
+	case reflect.Uint32:
+		elem.SetUint(uint64(x))
+	case reflect.Float32:
+		elem.SetFloat(float64(math.Float32frombits(x)))
+	}
+}
+
+func (p word32Slice) Len() int {
+	return p.v.Len()
+}
+
+func (p word32Slice) Index(i int) uint32 {
+	elem := p.v.Index(i)
+	switch elem.Kind() {
+	case reflect.Int32:
+		return uint32(elem.Int())
+	case reflect.Uint32:
+		return uint32(elem.Uint())
+	case reflect.Float32:
+		return math.Float32bits(float32(elem.Float()))
+	}
+	panic("unreachable")
+}
+
+// Word32Slice returns a reference to a []int32, []uint32, []float32, or []enum field in the struct.
+func structPointer_Word32Slice(p structPointer, f field) word32Slice {
+	return word32Slice{structPointer_field(p, f)}
+}
+
+// word64 is like word32 but for 64-bit values.
+type word64 struct {
+	v reflect.Value
+}
+
+func word64_Set(p word64, o *Buffer, x uint64) {
+	t := p.v.Type().Elem()
+	switch t {
+	case int64Type:
+		if len(o.int64s) == 0 {
+			o.int64s = make([]int64, uint64PoolSize)
+		}
+		o.int64s[0] = int64(x)
+		p.v.Set(reflect.ValueOf(&o.int64s[0]))
+		o.int64s = o.int64s[1:]
+		return
+	case uint64Type:
+		if len(o.uint64s) == 0 {
+			o.uint64s = make([]uint64, uint64PoolSize)
+		}
+		o.uint64s[0] = x
+		p.v.Set(reflect.ValueOf(&o.uint64s[0]))
+		o.uint64s = o.uint64s[1:]
+		return
+	case float64Type:
+		if len(o.float64s) == 0 {
+			o.float64s = make([]float64, uint64PoolSize)
+		}
+		o.float64s[0] = math.Float64frombits(x)
+		p.v.Set(reflect.ValueOf(&o.float64s[0]))
+		o.float64s = o.float64s[1:]
+		return
+	}
+	panic("unreachable")
+}
+
+func word64_IsNil(p word64) bool {
+	return p.v.IsNil()
+}
+
+func word64_Get(p word64) uint64 {
+	elem := p.v.Elem()
+	switch elem.Kind() {
+	case reflect.Int64:
+		return uint64(elem.Int())
+	case reflect.Uint64:
+		return elem.Uint()
+	case reflect.Float64:
+		return math.Float64bits(elem.Float())
+	}
+	panic("unreachable")
+}
+
+func structPointer_Word64(p structPointer, f field) word64 {
+	return word64{structPointer_field(p, f)}
+}
+
+// word64Val is like word32Val but for 64-bit values.
+type word64Val struct {
+	v reflect.Value
+}
+
+func word64Val_Set(p word64Val, o *Buffer, x uint64) {
+	switch p.v.Type() {
+	case int64Type:
+		p.v.SetInt(int64(x))
+		return
+	case uint64Type:
+		p.v.SetUint(x)
+		return
+	case float64Type:
+		p.v.SetFloat(math.Float64frombits(x))
+		return
+	}
+	panic("unreachable")
+}
+
+func word64Val_Get(p word64Val) uint64 {
+	elem := p.v
+	switch elem.Kind() {
+	case reflect.Int64:
+		return uint64(elem.Int())
+	case reflect.Uint64:
+		return elem.Uint()
+	case reflect.Float64:
+		return math.Float64bits(elem.Float())
+	}
+	panic("unreachable")
+}
+
+func structPointer_Word64Val(p structPointer, f field) word64Val {
+	return word64Val{structPointer_field(p, f)}
+}
+
+type word64Slice struct {
+	v reflect.Value
+}
+
+func (p word64Slice) Append(x uint64) {
+	n, m := p.v.Len(), p.v.Cap()
+	if n < m {
+		p.v.SetLen(n + 1)
+	} else {
+		t := p.v.Type().Elem()
+		p.v.Set(reflect.Append(p.v, reflect.Zero(t)))
+	}
+	elem := p.v.Index(n)
+	switch elem.Kind() {
+	case reflect.Int64:
+		elem.SetInt(int64(int64(x)))
+	case reflect.Uint64:
+		elem.SetUint(uint64(x))
+	case reflect.Float64:
+		elem.SetFloat(float64(math.Float64frombits(x)))
+	}
+}
+
+func (p word64Slice) Len() int {
+	return p.v.Len()
+}
+
+func (p word64Slice) Index(i int) uint64 {
+	elem := p.v.Index(i)
+	switch elem.Kind() {
+	case reflect.Int64:
+		return uint64(elem.Int())
+	case reflect.Uint64:
+		return uint64(elem.Uint())
+	case reflect.Float64:
+		return math.Float64bits(float64(elem.Float()))
+	}
+	panic("unreachable")
+}
+
+func structPointer_Word64Slice(p structPointer, f field) word64Slice {
+	return word64Slice{structPointer_field(p, f)}
+}
diff --git a/vendor/github.com/golang/protobuf/proto/pointer_unsafe.go b/vendor/github.com/golang/protobuf/proto/pointer_unsafe.go
new file mode 100644
index 000000000..6b5567d47
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/pointer_unsafe.go
@@ -0,0 +1,270 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2012 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// +build !appengine,!js
+
+// This file contains the implementation of the proto field accesses using package unsafe.
+
+package proto
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+// NOTE: These type_Foo functions would more idiomatically be methods,
+// but Go does not allow methods on pointer types, and we must preserve
+// some pointer type for the garbage collector. We use these
+// funcs with clunky names as our poor approximation to methods.
+//
+// An alternative would be
+//	type structPointer struct { p unsafe.Pointer }
+// but that does not registerize as well.
+
+// A structPointer is a pointer to a struct.
+type structPointer unsafe.Pointer
+
+// toStructPointer returns a structPointer equivalent to the given reflect value.
+func toStructPointer(v reflect.Value) structPointer {
+	return structPointer(unsafe.Pointer(v.Pointer()))
+}
+
+// IsNil reports whether p is nil.
+func structPointer_IsNil(p structPointer) bool {
+	return p == nil
+}
+
+// Interface returns the struct pointer, assumed to have element type t,
+// as an interface value.
+func structPointer_Interface(p structPointer, t reflect.Type) interface{} {
+	return reflect.NewAt(t, unsafe.Pointer(p)).Interface()
+}
+
+// A field identifies a field in a struct, accessible from a structPointer.
+// In this implementation, a field is identified by its byte offset from the start of the struct.
+type field uintptr
+
+// toField returns a field equivalent to the given reflect field.
+func toField(f *reflect.StructField) field {
+	return field(f.Offset)
+}
+
+// invalidField is an invalid field identifier.
+const invalidField = ^field(0)
+
+// IsValid reports whether the field identifier is valid.
+func (f field) IsValid() bool {
+	return f != ^field(0)
+}
+
+// Bytes returns the address of a []byte field in the struct.
+func structPointer_Bytes(p structPointer, f field) *[]byte {
+	return (*[]byte)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+}
+
+// BytesSlice returns the address of a [][]byte field in the struct.
+func structPointer_BytesSlice(p structPointer, f field) *[][]byte {
+	return (*[][]byte)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+}
+
+// Bool returns the address of a *bool field in the struct.
+func structPointer_Bool(p structPointer, f field) **bool {
+	return (**bool)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+}
+
+// BoolVal returns the address of a bool field in the struct.
+func structPointer_BoolVal(p structPointer, f field) *bool {
+	return (*bool)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+}
+
+// BoolSlice returns the address of a []bool field in the struct.
+func structPointer_BoolSlice(p structPointer, f field) *[]bool {
+	return (*[]bool)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+}
+
+// String returns the address of a *string field in the struct.
+func structPointer_String(p structPointer, f field) **string {
+	return (**string)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+}
+
+// StringVal returns the address of a string field in the struct.
+func structPointer_StringVal(p structPointer, f field) *string {
+	return (*string)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+}
+
+// StringSlice returns the address of a []string field in the struct.
+func structPointer_StringSlice(p structPointer, f field) *[]string {
+	return (*[]string)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+}
+
+// ExtMap returns the address of an extension map field in the struct.
+func structPointer_Extensions(p structPointer, f field) *XXX_InternalExtensions {
+	return (*XXX_InternalExtensions)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+}
+
+func structPointer_ExtMap(p structPointer, f field) *map[int32]Extension {
+	return (*map[int32]Extension)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+}
+
+// NewAt returns the reflect.Value for a pointer to a field in the struct.
+func structPointer_NewAt(p structPointer, f field, typ reflect.Type) reflect.Value {
+	return reflect.NewAt(typ, unsafe.Pointer(uintptr(p)+uintptr(f)))
+}
+
+// SetStructPointer writes a *struct field in the struct.
+func structPointer_SetStructPointer(p structPointer, f field, q structPointer) {
+	*(*structPointer)(unsafe.Pointer(uintptr(p) + uintptr(f))) = q
+}
+
+// GetStructPointer reads a *struct field in the struct.
+func structPointer_GetStructPointer(p structPointer, f field) structPointer {
+	return *(*structPointer)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+}
+
+// StructPointerSlice the address of a []*struct field in the struct.
+func structPointer_StructPointerSlice(p structPointer, f field) *structPointerSlice {
+	return (*structPointerSlice)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+}
+
+// A structPointerSlice represents a slice of pointers to structs (themselves submessages or groups).
+type structPointerSlice []structPointer
+
+func (v *structPointerSlice) Len() int                  { return len(*v) }
+func (v *structPointerSlice) Index(i int) structPointer { return (*v)[i] }
+func (v *structPointerSlice) Append(p structPointer)    { *v = append(*v, p) }
+
+// A word32 is the address of a "pointer to 32-bit value" field.
+type word32 **uint32
+
+// IsNil reports whether *v is nil.
+func word32_IsNil(p word32) bool {
+	return *p == nil
+}
+
+// Set sets *v to point at a newly allocated word set to x.
+func word32_Set(p word32, o *Buffer, x uint32) {
+	if len(o.uint32s) == 0 {
+		o.uint32s = make([]uint32, uint32PoolSize)
+	}
+	o.uint32s[0] = x
+	*p = &o.uint32s[0]
+	o.uint32s = o.uint32s[1:]
+}
+
+// Get gets the value pointed at by *v.
+func word32_Get(p word32) uint32 {
+	return **p
+}
+
+// Word32 returns the address of a *int32, *uint32, *float32, or *enum field in the struct.
+func structPointer_Word32(p structPointer, f field) word32 {
+	return word32((**uint32)(unsafe.Pointer(uintptr(p) + uintptr(f))))
+}
+
+// A word32Val is the address of a 32-bit value field.
+type word32Val *uint32
+
+// Set sets *p to x.
+func word32Val_Set(p word32Val, x uint32) {
+	*p = x
+}
+
+// Get gets the value pointed at by p.
+func word32Val_Get(p word32Val) uint32 {
+	return *p
+}
+
+// Word32Val returns the address of a *int32, *uint32, *float32, or *enum field in the struct.
+func structPointer_Word32Val(p structPointer, f field) word32Val {
+	return word32Val((*uint32)(unsafe.Pointer(uintptr(p) + uintptr(f))))
+}
+
+// A word32Slice is a slice of 32-bit values.
+type word32Slice []uint32
+
+func (v *word32Slice) Append(x uint32)    { *v = append(*v, x) }
+func (v *word32Slice) Len() int           { return len(*v) }
+func (v *word32Slice) Index(i int) uint32 { return (*v)[i] }
+
+// Word32Slice returns the address of a []int32, []uint32, []float32, or []enum field in the struct.
+func structPointer_Word32Slice(p structPointer, f field) *word32Slice {
+	return (*word32Slice)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+}
+
+// word64 is like word32 but for 64-bit values.
+type word64 **uint64
+
+func word64_Set(p word64, o *Buffer, x uint64) {
+	if len(o.uint64s) == 0 {
+		o.uint64s = make([]uint64, uint64PoolSize)
+	}
+	o.uint64s[0] = x
+	*p = &o.uint64s[0]
+	o.uint64s = o.uint64s[1:]
+}
+
+func word64_IsNil(p word64) bool {
+	return *p == nil
+}
+
+func word64_Get(p word64) uint64 {
+	return **p
+}
+
+func structPointer_Word64(p structPointer, f field) word64 {
+	return word64((**uint64)(unsafe.Pointer(uintptr(p) + uintptr(f))))
+}
+
+// word64Val is like word32Val but for 64-bit values.
+type word64Val *uint64
+
+func word64Val_Set(p word64Val, o *Buffer, x uint64) {
+	*p = x
+}
+
+func word64Val_Get(p word64Val) uint64 {
+	return *p
+}
+
+func structPointer_Word64Val(p structPointer, f field) word64Val {
+	return word64Val((*uint64)(unsafe.Pointer(uintptr(p) + uintptr(f))))
+}
+
+// word64Slice is like word32Slice but for 64-bit values.
+type word64Slice []uint64
+
+func (v *word64Slice) Append(x uint64)    { *v = append(*v, x) }
+func (v *word64Slice) Len() int           { return len(*v) }
+func (v *word64Slice) Index(i int) uint64 { return (*v)[i] }
+
+func structPointer_Word64Slice(p structPointer, f field) *word64Slice {
+	return (*word64Slice)(unsafe.Pointer(uintptr(p) + uintptr(f)))
+}
diff --git a/vendor/github.com/golang/protobuf/proto/properties.go b/vendor/github.com/golang/protobuf/proto/properties.go
new file mode 100644
index 000000000..ec2289c00
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/properties.go
@@ -0,0 +1,872 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2010 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package proto
+
+/*
+ * Routines for encoding data into the wire format for protocol buffers.
+ */
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"reflect"
+	"sort"
+	"strconv"
+	"strings"
+	"sync"
+)
+
+const debug bool = false
+
+// Constants that identify the encoding of a value on the wire.
+const (
+	WireVarint     = 0
+	WireFixed64    = 1
+	WireBytes      = 2
+	WireStartGroup = 3
+	WireEndGroup   = 4
+	WireFixed32    = 5
+)
+
+const startSize = 10 // initial slice/string sizes
+
+// Encoders are defined in encode.go
+// An encoder outputs the full representation of a field, including its
+// tag and encoder type.
+type encoder func(p *Buffer, prop *Properties, base structPointer) error
+
+// A valueEncoder encodes a single integer in a particular encoding.
+type valueEncoder func(o *Buffer, x uint64) error
+
+// Sizers are defined in encode.go
+// A sizer returns the encoded size of a field, including its tag and encoder
+// type.
+type sizer func(prop *Properties, base structPointer) int
+
+// A valueSizer returns the encoded size of a single integer in a particular
+// encoding.
+type valueSizer func(x uint64) int
+
+// Decoders are defined in decode.go
+// A decoder creates a value from its wire representation.
+// Unrecognized subelements are saved in unrec.
+type decoder func(p *Buffer, prop *Properties, base structPointer) error
+
+// A valueDecoder decodes a single integer in a particular encoding.
+type valueDecoder func(o *Buffer) (x uint64, err error)
+
+// A oneofMarshaler does the marshaling for all oneof fields in a message.
+type oneofMarshaler func(Message, *Buffer) error
+
+// A oneofUnmarshaler does the unmarshaling for a oneof field in a message.
+type oneofUnmarshaler func(Message, int, int, *Buffer) (bool, error)
+
+// A oneofSizer does the sizing for all oneof fields in a message.
+type oneofSizer func(Message) int
+
+// tagMap is an optimization over map[int]int for typical protocol buffer
+// use-cases. Encoded protocol buffers are often in tag order with small tag
+// numbers.
+type tagMap struct {
+	fastTags []int
+	slowTags map[int]int
+}
+
+// tagMapFastLimit is the upper bound on the tag number that will be stored in
+// the tagMap slice rather than its map.
+const tagMapFastLimit = 1024
+
+func (p *tagMap) get(t int) (int, bool) {
+	if t > 0 && t < tagMapFastLimit {
+		if t >= len(p.fastTags) {
+			return 0, false
+		}
+		fi := p.fastTags[t]
+		return fi, fi >= 0
+	}
+	fi, ok := p.slowTags[t]
+	return fi, ok
+}
+
+func (p *tagMap) put(t int, fi int) {
+	if t > 0 && t < tagMapFastLimit {
+		for len(p.fastTags) < t+1 {
+			p.fastTags = append(p.fastTags, -1)
+		}
+		p.fastTags[t] = fi
+		return
+	}
+	if p.slowTags == nil {
+		p.slowTags = make(map[int]int)
+	}
+	p.slowTags[t] = fi
+}
+
+// StructProperties represents properties for all the fields of a struct.
+// decoderTags and decoderOrigNames should only be used by the decoder.
+type StructProperties struct {
+	Prop             []*Properties  // properties for each field
+	reqCount         int            // required count
+	decoderTags      tagMap         // map from proto tag to struct field number
+	decoderOrigNames map[string]int // map from original name to struct field number
+	order            []int          // list of struct field numbers in tag order
+	unrecField       field          // field id of the XXX_unrecognized []byte field
+	extendable       bool           // is this an extendable proto
+
+	oneofMarshaler   oneofMarshaler
+	oneofUnmarshaler oneofUnmarshaler
+	oneofSizer       oneofSizer
+	stype            reflect.Type
+
+	// OneofTypes contains information about the oneof fields in this message.
+	// It is keyed by the original name of a field.
+	OneofTypes map[string]*OneofProperties
+}
+
+// OneofProperties represents information about a specific field in a oneof.
+type OneofProperties struct {
+	Type  reflect.Type // pointer to generated struct type for this oneof field
+	Field int          // struct field number of the containing oneof in the message
+	Prop  *Properties
+}
+
+// Implement the sorting interface so we can sort the fields in tag order, as recommended by the spec.
+// See encode.go, (*Buffer).enc_struct.
+
+func (sp *StructProperties) Len() int { return len(sp.order) }
+func (sp *StructProperties) Less(i, j int) bool {
+	return sp.Prop[sp.order[i]].Tag < sp.Prop[sp.order[j]].Tag
+}
+func (sp *StructProperties) Swap(i, j int) { sp.order[i], sp.order[j] = sp.order[j], sp.order[i] }
+
+// Properties represents the protocol-specific behavior of a single struct field.
+type Properties struct {
+	Name     string // name of the field, for error messages
+	OrigName string // original name before protocol compiler (always set)
+	JSONName string // name to use for JSON; determined by protoc
+	Wire     string
+	WireType int
+	Tag      int
+	Required bool
+	Optional bool
+	Repeated bool
+	Packed   bool   // relevant for repeated primitives only
+	Enum     string // set for enum types only
+	proto3   bool   // whether this is known to be a proto3 field; set for []byte only
+	oneof    bool   // whether this is a oneof field
+
+	Default    string // default value
+	HasDefault bool   // whether an explicit default was provided
+	def_uint64 uint64
+
+	enc           encoder
+	valEnc        valueEncoder // set for bool and numeric types only
+	field         field
+	tagcode       []byte // encoding of EncodeVarint((Tag<<3)|WireType)
+	tagbuf        [8]byte
+	stype         reflect.Type      // set for struct types only
+	sprop         *StructProperties // set for struct types only
+	isMarshaler   bool
+	isUnmarshaler bool
+
+	mtype    reflect.Type // set for map types only
+	mkeyprop *Properties  // set for map types only
+	mvalprop *Properties  // set for map types only
+
+	size    sizer
+	valSize valueSizer // set for bool and numeric types only
+
+	dec    decoder
+	valDec valueDecoder // set for bool and numeric types only
+
+	// If this is a packable field, this will be the decoder for the packed version of the field.
+	packedDec decoder
+}
+
+// String formats the properties in the protobuf struct field tag style.
+func (p *Properties) String() string {
+	s := p.Wire
+	s = ","
+	s += strconv.Itoa(p.Tag)
+	if p.Required {
+		s += ",req"
+	}
+	if p.Optional {
+		s += ",opt"
+	}
+	if p.Repeated {
+		s += ",rep"
+	}
+	if p.Packed {
+		s += ",packed"
+	}
+	s += ",name=" + p.OrigName
+	if p.JSONName != p.OrigName {
+		s += ",json=" + p.JSONName
+	}
+	if p.proto3 {
+		s += ",proto3"
+	}
+	if p.oneof {
+		s += ",oneof"
+	}
+	if len(p.Enum) > 0 {
+		s += ",enum=" + p.Enum
+	}
+	if p.HasDefault {
+		s += ",def=" + p.Default
+	}
+	return s
+}
+
+// Parse populates p by parsing a string in the protobuf struct field tag style.
+func (p *Properties) Parse(s string) {
+	// "bytes,49,opt,name=foo,def=hello!"
+	fields := strings.Split(s, ",") // breaks def=, but handled below.
+	if len(fields) < 2 {
+		fmt.Fprintf(os.Stderr, "proto: tag has too few fields: %q\n", s)
+		return
+	}
+
+	p.Wire = fields[0]
+	switch p.Wire {
+	case "varint":
+		p.WireType = WireVarint
+		p.valEnc = (*Buffer).EncodeVarint
+		p.valDec = (*Buffer).DecodeVarint
+		p.valSize = sizeVarint
+	case "fixed32":
+		p.WireType = WireFixed32
+		p.valEnc = (*Buffer).EncodeFixed32
+		p.valDec = (*Buffer).DecodeFixed32
+		p.valSize = sizeFixed32
+	case "fixed64":
+		p.WireType = WireFixed64
+		p.valEnc = (*Buffer).EncodeFixed64
+		p.valDec = (*Buffer).DecodeFixed64
+		p.valSize = sizeFixed64
+	case "zigzag32":
+		p.WireType = WireVarint
+		p.valEnc = (*Buffer).EncodeZigzag32
+		p.valDec = (*Buffer).DecodeZigzag32
+		p.valSize = sizeZigzag32
+	case "zigzag64":
+		p.WireType = WireVarint
+		p.valEnc = (*Buffer).EncodeZigzag64
+		p.valDec = (*Buffer).DecodeZigzag64
+		p.valSize = sizeZigzag64
+	case "bytes", "group":
+		p.WireType = WireBytes
+		// no numeric converter for non-numeric types
+	default:
+		fmt.Fprintf(os.Stderr, "proto: tag has unknown wire type: %q\n", s)
+		return
+	}
+
+	var err error
+	p.Tag, err = strconv.Atoi(fields[1])
+	if err != nil {
+		return
+	}
+
+	for i := 2; i < len(fields); i++ {
+		f := fields[i]
+		switch {
+		case f == "req":
+			p.Required = true
+		case f == "opt":
+			p.Optional = true
+		case f == "rep":
+			p.Repeated = true
+		case f == "packed":
+			p.Packed = true
+		case strings.HasPrefix(f, "name="):
+			p.OrigName = f[5:]
+		case strings.HasPrefix(f, "json="):
+			p.JSONName = f[5:]
+		case strings.HasPrefix(f, "enum="):
+			p.Enum = f[5:]
+		case f == "proto3":
+			p.proto3 = true
+		case f == "oneof":
+			p.oneof = true
+		case strings.HasPrefix(f, "def="):
+			p.HasDefault = true
+			p.Default = f[4:] // rest of string
+			if i+1 < len(fields) {
+				// Commas aren't escaped, and def is always last.
+				p.Default += "," + strings.Join(fields[i+1:], ",")
+				break
+			}
+		}
+	}
+}
+
+func logNoSliceEnc(t1, t2 reflect.Type) {
+	fmt.Fprintf(os.Stderr, "proto: no slice oenc for %T = []%T\n", t1, t2)
+}
+
+var protoMessageType = reflect.TypeOf((*Message)(nil)).Elem()
+
+// Initialize the fields for encoding and decoding.
+func (p *Properties) setEncAndDec(typ reflect.Type, f *reflect.StructField, lockGetProp bool) {
+	p.enc = nil
+	p.dec = nil
+	p.size = nil
+
+	switch t1 := typ; t1.Kind() {
+	default:
+		fmt.Fprintf(os.Stderr, "proto: no coders for %v\n", t1)
+
+	// proto3 scalar types
+
+	case reflect.Bool:
+		p.enc = (*Buffer).enc_proto3_bool
+		p.dec = (*Buffer).dec_proto3_bool
+		p.size = size_proto3_bool
+	case reflect.Int32:
+		p.enc = (*Buffer).enc_proto3_int32
+		p.dec = (*Buffer).dec_proto3_int32
+		p.size = size_proto3_int32
+	case reflect.Uint32:
+		p.enc = (*Buffer).enc_proto3_uint32
+		p.dec = (*Buffer).dec_proto3_int32 // can reuse
+		p.size = size_proto3_uint32
+	case reflect.Int64, reflect.Uint64:
+		p.enc = (*Buffer).enc_proto3_int64
+		p.dec = (*Buffer).dec_proto3_int64
+		p.size = size_proto3_int64
+	case reflect.Float32:
+		p.enc = (*Buffer).enc_proto3_uint32 // can just treat them as bits
+		p.dec = (*Buffer).dec_proto3_int32
+		p.size = size_proto3_uint32
+	case reflect.Float64:
+		p.enc = (*Buffer).enc_proto3_int64 // can just treat them as bits
+		p.dec = (*Buffer).dec_proto3_int64
+		p.size = size_proto3_int64
+	case reflect.String:
+		p.enc = (*Buffer).enc_proto3_string
+		p.dec = (*Buffer).dec_proto3_string
+		p.size = size_proto3_string
+
+	case reflect.Ptr:
+		switch t2 := t1.Elem(); t2.Kind() {
+		default:
+			fmt.Fprintf(os.Stderr, "proto: no encoder function for %v -> %v\n", t1, t2)
+			break
+		case reflect.Bool:
+			p.enc = (*Buffer).enc_bool
+			p.dec = (*Buffer).dec_bool
+			p.size = size_bool
+		case reflect.Int32:
+			p.enc = (*Buffer).enc_int32
+			p.dec = (*Buffer).dec_int32
+			p.size = size_int32
+		case reflect.Uint32:
+			p.enc = (*Buffer).enc_uint32
+			p.dec = (*Buffer).dec_int32 // can reuse
+			p.size = size_uint32
+		case reflect.Int64, reflect.Uint64:
+			p.enc = (*Buffer).enc_int64
+			p.dec = (*Buffer).dec_int64
+			p.size = size_int64
+		case reflect.Float32:
+			p.enc = (*Buffer).enc_uint32 // can just treat them as bits
+			p.dec = (*Buffer).dec_int32
+			p.size = size_uint32
+		case reflect.Float64:
+			p.enc = (*Buffer).enc_int64 // can just treat them as bits
+			p.dec = (*Buffer).dec_int64
+			p.size = size_int64
+		case reflect.String:
+			p.enc = (*Buffer).enc_string
+			p.dec = (*Buffer).dec_string
+			p.size = size_string
+		case reflect.Struct:
+			p.stype = t1.Elem()
+			p.isMarshaler = isMarshaler(t1)
+			p.isUnmarshaler = isUnmarshaler(t1)
+			if p.Wire == "bytes" {
+				p.enc = (*Buffer).enc_struct_message
+				p.dec = (*Buffer).dec_struct_message
+				p.size = size_struct_message
+			} else {
+				p.enc = (*Buffer).enc_struct_group
+				p.dec = (*Buffer).dec_struct_group
+				p.size = size_struct_group
+			}
+		}
+
+	case reflect.Slice:
+		switch t2 := t1.Elem(); t2.Kind() {
+		default:
+			logNoSliceEnc(t1, t2)
+			break
+		case reflect.Bool:
+			if p.Packed {
+				p.enc = (*Buffer).enc_slice_packed_bool
+				p.size = size_slice_packed_bool
+			} else {
+				p.enc = (*Buffer).enc_slice_bool
+				p.size = size_slice_bool
+			}
+			p.dec = (*Buffer).dec_slice_bool
+			p.packedDec = (*Buffer).dec_slice_packed_bool
+		case reflect.Int32:
+			if p.Packed {
+				p.enc = (*Buffer).enc_slice_packed_int32
+				p.size = size_slice_packed_int32
+			} else {
+				p.enc = (*Buffer).enc_slice_int32
+				p.size = size_slice_int32
+			}
+			p.dec = (*Buffer).dec_slice_int32
+			p.packedDec = (*Buffer).dec_slice_packed_int32
+		case reflect.Uint32:
+			if p.Packed {
+				p.enc = (*Buffer).enc_slice_packed_uint32
+				p.size = size_slice_packed_uint32
+			} else {
+				p.enc = (*Buffer).enc_slice_uint32
+				p.size = size_slice_uint32
+			}
+			p.dec = (*Buffer).dec_slice_int32
+			p.packedDec = (*Buffer).dec_slice_packed_int32
+		case reflect.Int64, reflect.Uint64:
+			if p.Packed {
+				p.enc = (*Buffer).enc_slice_packed_int64
+				p.size = size_slice_packed_int64
+			} else {
+				p.enc = (*Buffer).enc_slice_int64
+				p.size = size_slice_int64
+			}
+			p.dec = (*Buffer).dec_slice_int64
+			p.packedDec = (*Buffer).dec_slice_packed_int64
+		case reflect.Uint8:
+			p.dec = (*Buffer).dec_slice_byte
+			if p.proto3 {
+				p.enc = (*Buffer).enc_proto3_slice_byte
+				p.size = size_proto3_slice_byte
+			} else {
+				p.enc = (*Buffer).enc_slice_byte
+				p.size = size_slice_byte
+			}
+		case reflect.Float32, reflect.Float64:
+			switch t2.Bits() {
+			case 32:
+				// can just treat them as bits
+				if p.Packed {
+					p.enc = (*Buffer).enc_slice_packed_uint32
+					p.size = size_slice_packed_uint32
+				} else {
+					p.enc = (*Buffer).enc_slice_uint32
+					p.size = size_slice_uint32
+				}
+				p.dec = (*Buffer).dec_slice_int32
+				p.packedDec = (*Buffer).dec_slice_packed_int32
+			case 64:
+				// can just treat them as bits
+				if p.Packed {
+					p.enc = (*Buffer).enc_slice_packed_int64
+					p.size = size_slice_packed_int64
+				} else {
+					p.enc = (*Buffer).enc_slice_int64
+					p.size = size_slice_int64
+				}
+				p.dec = (*Buffer).dec_slice_int64
+				p.packedDec = (*Buffer).dec_slice_packed_int64
+			default:
+				logNoSliceEnc(t1, t2)
+				break
+			}
+		case reflect.String:
+			p.enc = (*Buffer).enc_slice_string
+			p.dec = (*Buffer).dec_slice_string
+			p.size = size_slice_string
+		case reflect.Ptr:
+			switch t3 := t2.Elem(); t3.Kind() {
+			default:
+				fmt.Fprintf(os.Stderr, "proto: no ptr oenc for %T -> %T -> %T\n", t1, t2, t3)
+				break
+			case reflect.Struct:
+				p.stype = t2.Elem()
+				p.isMarshaler = isMarshaler(t2)
+				p.isUnmarshaler = isUnmarshaler(t2)
+				if p.Wire == "bytes" {
+					p.enc = (*Buffer).enc_slice_struct_message
+					p.dec = (*Buffer).dec_slice_struct_message
+					p.size = size_slice_struct_message
+				} else {
+					p.enc = (*Buffer).enc_slice_struct_group
+					p.dec = (*Buffer).dec_slice_struct_group
+					p.size = size_slice_struct_group
+				}
+			}
+		case reflect.Slice:
+			switch t2.Elem().Kind() {
+			default:
+				fmt.Fprintf(os.Stderr, "proto: no slice elem oenc for %T -> %T -> %T\n", t1, t2, t2.Elem())
+				break
+			case reflect.Uint8:
+				p.enc = (*Buffer).enc_slice_slice_byte
+				p.dec = (*Buffer).dec_slice_slice_byte
+				p.size = size_slice_slice_byte
+			}
+		}
+
+	case reflect.Map:
+		p.enc = (*Buffer).enc_new_map
+		p.dec = (*Buffer).dec_new_map
+		p.size = size_new_map
+
+		p.mtype = t1
+		p.mkeyprop = &Properties{}
+		p.mkeyprop.init(reflect.PtrTo(p.mtype.Key()), "Key", f.Tag.Get("protobuf_key"), nil, lockGetProp)
+		p.mvalprop = &Properties{}
+		vtype := p.mtype.Elem()
+		if vtype.Kind() != reflect.Ptr && vtype.Kind() != reflect.Slice {
+			// The value type is not a message (*T) or bytes ([]byte),
+			// so we need encoders for the pointer to this type.
+			vtype = reflect.PtrTo(vtype)
+		}
+		p.mvalprop.init(vtype, "Value", f.Tag.Get("protobuf_val"), nil, lockGetProp)
+	}
+
+	// precalculate tag code
+	wire := p.WireType
+	if p.Packed {
+		wire = WireBytes
+	}
+	x := uint32(p.Tag)<<3 | uint32(wire)
+	i := 0
+	for i = 0; x > 127; i++ {
+		p.tagbuf[i] = 0x80 | uint8(x&0x7F)
+		x >>= 7
+	}
+	p.tagbuf[i] = uint8(x)
+	p.tagcode = p.tagbuf[0 : i+1]
+
+	if p.stype != nil {
+		if lockGetProp {
+			p.sprop = GetProperties(p.stype)
+		} else {
+			p.sprop = getPropertiesLocked(p.stype)
+		}
+	}
+}
+
+var (
+	marshalerType   = reflect.TypeOf((*Marshaler)(nil)).Elem()
+	unmarshalerType = reflect.TypeOf((*Unmarshaler)(nil)).Elem()
+)
+
+// isMarshaler reports whether type t implements Marshaler.
+func isMarshaler(t reflect.Type) bool {
+	// We're checking for (likely) pointer-receiver methods
+	// so if t is not a pointer, something is very wrong.
+	// The calls above only invoke isMarshaler on pointer types.
+	if t.Kind() != reflect.Ptr {
+		panic("proto: misuse of isMarshaler")
+	}
+	return t.Implements(marshalerType)
+}
+
+// isUnmarshaler reports whether type t implements Unmarshaler.
+func isUnmarshaler(t reflect.Type) bool {
+	// We're checking for (likely) pointer-receiver methods
+	// so if t is not a pointer, something is very wrong.
+	// The calls above only invoke isUnmarshaler on pointer types.
+	if t.Kind() != reflect.Ptr {
+		panic("proto: misuse of isUnmarshaler")
+	}
+	return t.Implements(unmarshalerType)
+}
+
+// Init populates the properties from a protocol buffer struct tag.
+func (p *Properties) Init(typ reflect.Type, name, tag string, f *reflect.StructField) {
+	p.init(typ, name, tag, f, true)
+}
+
+func (p *Properties) init(typ reflect.Type, name, tag string, f *reflect.StructField, lockGetProp bool) {
+	// "bytes,49,opt,def=hello!"
+	p.Name = name
+	p.OrigName = name
+	if f != nil {
+		p.field = toField(f)
+	}
+	if tag == "" {
+		return
+	}
+	p.Parse(tag)
+	p.setEncAndDec(typ, f, lockGetProp)
+}
+
+var (
+	propertiesMu  sync.RWMutex
+	propertiesMap = make(map[reflect.Type]*StructProperties)
+)
+
+// GetProperties returns the list of properties for the type represented by t.
+// t must represent a generated struct type of a protocol message.
+func GetProperties(t reflect.Type) *StructProperties {
+	if t.Kind() != reflect.Struct {
+		panic("proto: type must have kind struct")
+	}
+
+	// Most calls to GetProperties in a long-running program will be
+	// retrieving details for types we have seen before.
+	propertiesMu.RLock()
+	sprop, ok := propertiesMap[t]
+	propertiesMu.RUnlock()
+	if ok {
+		if collectStats {
+			stats.Chit++
+		}
+		return sprop
+	}
+
+	propertiesMu.Lock()
+	sprop = getPropertiesLocked(t)
+	propertiesMu.Unlock()
+	return sprop
+}
+
+// getPropertiesLocked requires that propertiesMu is held.
+func getPropertiesLocked(t reflect.Type) *StructProperties {
+	if prop, ok := propertiesMap[t]; ok {
+		if collectStats {
+			stats.Chit++
+		}
+		return prop
+	}
+	if collectStats {
+		stats.Cmiss++
+	}
+
+	prop := new(StructProperties)
+	// in case of recursive protos, fill this in now.
+	propertiesMap[t] = prop
+
+	// build properties
+	prop.extendable = reflect.PtrTo(t).Implements(extendableProtoType) ||
+		reflect.PtrTo(t).Implements(extendableProtoV1Type)
+	prop.unrecField = invalidField
+	prop.Prop = make([]*Properties, t.NumField())
+	prop.order = make([]int, t.NumField())
+
+	for i := 0; i < t.NumField(); i++ {
+		f := t.Field(i)
+		p := new(Properties)
+		name := f.Name
+		p.init(f.Type, name, f.Tag.Get("protobuf"), &f, false)
+
+		if f.Name == "XXX_InternalExtensions" { // special case
+			p.enc = (*Buffer).enc_exts
+			p.dec = nil // not needed
+			p.size = size_exts
+		} else if f.Name == "XXX_extensions" { // special case
+			p.enc = (*Buffer).enc_map
+			p.dec = nil // not needed
+			p.size = size_map
+		} else if f.Name == "XXX_unrecognized" { // special case
+			prop.unrecField = toField(&f)
+		}
+		oneof := f.Tag.Get("protobuf_oneof") // special case
+		if oneof != "" {
+			// Oneof fields don't use the traditional protobuf tag.
+			p.OrigName = oneof
+		}
+		prop.Prop[i] = p
+		prop.order[i] = i
+		if debug {
+			print(i, " ", f.Name, " ", t.String(), " ")
+			if p.Tag > 0 {
+				print(p.String())
+			}
+			print("\n")
+		}
+		if p.enc == nil && !strings.HasPrefix(f.Name, "XXX_") && oneof == "" {
+			fmt.Fprintln(os.Stderr, "proto: no encoder for", f.Name, f.Type.String(), "[GetProperties]")
+		}
+	}
+
+	// Re-order prop.order.
+	sort.Sort(prop)
+
+	type oneofMessage interface {
+		XXX_OneofFuncs() (func(Message, *Buffer) error, func(Message, int, int, *Buffer) (bool, error), func(Message) int, []interface{})
+	}
+	if om, ok := reflect.Zero(reflect.PtrTo(t)).Interface().(oneofMessage); ok {
+		var oots []interface{}
+		prop.oneofMarshaler, prop.oneofUnmarshaler, prop.oneofSizer, oots = om.XXX_OneofFuncs()
+		prop.stype = t
+
+		// Interpret oneof metadata.
+		prop.OneofTypes = make(map[string]*OneofProperties)
+		for _, oot := range oots {
+			oop := &OneofProperties{
+				Type: reflect.ValueOf(oot).Type(), // *T
+				Prop: new(Properties),
+			}
+			sft := oop.Type.Elem().Field(0)
+			oop.Prop.Name = sft.Name
+			oop.Prop.Parse(sft.Tag.Get("protobuf"))
+			// There will be exactly one interface field that
+			// this new value is assignable to.
+			for i := 0; i < t.NumField(); i++ {
+				f := t.Field(i)
+				if f.Type.Kind() != reflect.Interface {
+					continue
+				}
+				if !oop.Type.AssignableTo(f.Type) {
+					continue
+				}
+				oop.Field = i
+				break
+			}
+			prop.OneofTypes[oop.Prop.OrigName] = oop
+		}
+	}
+
+	// build required counts
+	// build tags
+	reqCount := 0
+	prop.decoderOrigNames = make(map[string]int)
+	for i, p := range prop.Prop {
+		if strings.HasPrefix(p.Name, "XXX_") {
+			// Internal fields should not appear in tags/origNames maps.
+			// They are handled specially when encoding and decoding.
+			continue
+		}
+		if p.Required {
+			reqCount++
+		}
+		prop.decoderTags.put(p.Tag, i)
+		prop.decoderOrigNames[p.OrigName] = i
+	}
+	prop.reqCount = reqCount
+
+	return prop
+}
+
+// Return the Properties object for the x[0]'th field of the structure.
+func propByIndex(t reflect.Type, x []int) *Properties {
+	if len(x) != 1 {
+		fmt.Fprintf(os.Stderr, "proto: field index dimension %d (not 1) for type %s\n", len(x), t)
+		return nil
+	}
+	prop := GetProperties(t)
+	return prop.Prop[x[0]]
+}
+
+// Get the address and type of a pointer to a struct from an interface.
+func getbase(pb Message) (t reflect.Type, b structPointer, err error) {
+	if pb == nil {
+		err = ErrNil
+		return
+	}
+	// get the reflect type of the pointer to the struct.
+	t = reflect.TypeOf(pb)
+	// get the address of the struct.
+	value := reflect.ValueOf(pb)
+	b = toStructPointer(value)
+	return
+}
+
+// A global registry of enum types.
+// The generated code will register the generated maps by calling RegisterEnum.
+
+var enumValueMaps = make(map[string]map[string]int32)
+
+// RegisterEnum is called from the generated code to install the enum descriptor
+// maps into the global table to aid parsing text format protocol buffers.
+func RegisterEnum(typeName string, unusedNameMap map[int32]string, valueMap map[string]int32) {
+	if _, ok := enumValueMaps[typeName]; ok {
+		panic("proto: duplicate enum registered: " + typeName)
+	}
+	enumValueMaps[typeName] = valueMap
+}
+
+// EnumValueMap returns the mapping from names to integers of the
+// enum type enumType, or a nil if not found.
+func EnumValueMap(enumType string) map[string]int32 {
+	return enumValueMaps[enumType]
+}
+
+// A registry of all linked message types.
+// The string is a fully-qualified proto name ("pkg.Message").
+var (
+	protoTypes    = make(map[string]reflect.Type)
+	revProtoTypes = make(map[reflect.Type]string)
+)
+
+// RegisterType is called from generated code and maps from the fully qualified
+// proto name to the type (pointer to struct) of the protocol buffer.
+func RegisterType(x Message, name string) {
+	if _, ok := protoTypes[name]; ok {
+		// TODO: Some day, make this a panic.
+		log.Printf("proto: duplicate proto type registered: %s", name)
+		return
+	}
+	t := reflect.TypeOf(x)
+	protoTypes[name] = t
+	revProtoTypes[t] = name
+}
+
+// MessageName returns the fully-qualified proto name for the given message type.
+func MessageName(x Message) string {
+	type xname interface {
+		XXX_MessageName() string
+	}
+	if m, ok := x.(xname); ok {
+		return m.XXX_MessageName()
+	}
+	return revProtoTypes[reflect.TypeOf(x)]
+}
+
+// MessageType returns the message type (pointer to struct) for a named message.
+func MessageType(name string) reflect.Type { return protoTypes[name] }
+
+// A registry of all linked proto files.
+var (
+	protoFiles = make(map[string][]byte) // file name => fileDescriptor
+)
+
+// RegisterFile is called from generated code and maps from the
+// full file name of a .proto file to its compressed FileDescriptorProto.
+func RegisterFile(filename string, fileDescriptor []byte) {
+	protoFiles[filename] = fileDescriptor
+}
+
+// FileDescriptor returns the compressed FileDescriptorProto for a .proto file.
+func FileDescriptor(filename string) []byte { return protoFiles[filename] }
diff --git a/vendor/github.com/golang/protobuf/proto/text.go b/vendor/github.com/golang/protobuf/proto/text.go
new file mode 100644
index 000000000..965876bf0
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/text.go
@@ -0,0 +1,854 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2010 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package proto
+
+// Functions for writing the text protocol buffer format.
+
+import (
+	"bufio"
+	"bytes"
+	"encoding"
+	"errors"
+	"fmt"
+	"io"
+	"log"
+	"math"
+	"reflect"
+	"sort"
+	"strings"
+)
+
+var (
+	newline         = []byte("\n")
+	spaces          = []byte("                                        ")
+	gtNewline       = []byte(">\n")
+	endBraceNewline = []byte("}\n")
+	backslashN      = []byte{'\\', 'n'}
+	backslashR      = []byte{'\\', 'r'}
+	backslashT      = []byte{'\\', 't'}
+	backslashDQ     = []byte{'\\', '"'}
+	backslashBS     = []byte{'\\', '\\'}
+	posInf          = []byte("inf")
+	negInf          = []byte("-inf")
+	nan             = []byte("nan")
+)
+
+type writer interface {
+	io.Writer
+	WriteByte(byte) error
+}
+
+// textWriter is an io.Writer that tracks its indentation level.
+type textWriter struct {
+	ind      int
+	complete bool // if the current position is a complete line
+	compact  bool // whether to write out as a one-liner
+	w        writer
+}
+
+func (w *textWriter) WriteString(s string) (n int, err error) {
+	if !strings.Contains(s, "\n") {
+		if !w.compact && w.complete {
+			w.writeIndent()
+		}
+		w.complete = false
+		return io.WriteString(w.w, s)
+	}
+	// WriteString is typically called without newlines, so this
+	// codepath and its copy are rare.  We copy to avoid
+	// duplicating all of Write's logic here.
+	return w.Write([]byte(s))
+}
+
+func (w *textWriter) Write(p []byte) (n int, err error) {
+	newlines := bytes.Count(p, newline)
+	if newlines == 0 {
+		if !w.compact && w.complete {
+			w.writeIndent()
+		}
+		n, err = w.w.Write(p)
+		w.complete = false
+		return n, err
+	}
+
+	frags := bytes.SplitN(p, newline, newlines+1)
+	if w.compact {
+		for i, frag := range frags {
+			if i > 0 {
+				if err := w.w.WriteByte(' '); err != nil {
+					return n, err
+				}
+				n++
+			}
+			nn, err := w.w.Write(frag)
+			n += nn
+			if err != nil {
+				return n, err
+			}
+		}
+		return n, nil
+	}
+
+	for i, frag := range frags {
+		if w.complete {
+			w.writeIndent()
+		}
+		nn, err := w.w.Write(frag)
+		n += nn
+		if err != nil {
+			return n, err
+		}
+		if i+1 < len(frags) {
+			if err := w.w.WriteByte('\n'); err != nil {
+				return n, err
+			}
+			n++
+		}
+	}
+	w.complete = len(frags[len(frags)-1]) == 0
+	return n, nil
+}
+
+func (w *textWriter) WriteByte(c byte) error {
+	if w.compact && c == '\n' {
+		c = ' '
+	}
+	if !w.compact && w.complete {
+		w.writeIndent()
+	}
+	err := w.w.WriteByte(c)
+	w.complete = c == '\n'
+	return err
+}
+
+func (w *textWriter) indent() { w.ind++ }
+
+func (w *textWriter) unindent() {
+	if w.ind == 0 {
+		log.Print("proto: textWriter unindented too far")
+		return
+	}
+	w.ind--
+}
+
+func writeName(w *textWriter, props *Properties) error {
+	if _, err := w.WriteString(props.OrigName); err != nil {
+		return err
+	}
+	if props.Wire != "group" {
+		return w.WriteByte(':')
+	}
+	return nil
+}
+
+// raw is the interface satisfied by RawMessage.
+type raw interface {
+	Bytes() []byte
+}
+
+func requiresQuotes(u string) bool {
+	// When type URL contains any characters except [0-9A-Za-z./\-]*, it must be quoted.
+	for _, ch := range u {
+		switch {
+		case ch == '.' || ch == '/' || ch == '_':
+			continue
+		case '0' <= ch && ch <= '9':
+			continue
+		case 'A' <= ch && ch <= 'Z':
+			continue
+		case 'a' <= ch && ch <= 'z':
+			continue
+		default:
+			return true
+		}
+	}
+	return false
+}
+
+// isAny reports whether sv is a google.protobuf.Any message
+func isAny(sv reflect.Value) bool {
+	type wkt interface {
+		XXX_WellKnownType() string
+	}
+	t, ok := sv.Addr().Interface().(wkt)
+	return ok && t.XXX_WellKnownType() == "Any"
+}
+
+// writeProto3Any writes an expanded google.protobuf.Any message.
+//
+// It returns (false, nil) if sv value can't be unmarshaled (e.g. because
+// required messages are not linked in).
+//
+// It returns (true, error) when sv was written in expanded format or an error
+// was encountered.
+func (tm *TextMarshaler) writeProto3Any(w *textWriter, sv reflect.Value) (bool, error) {
+	turl := sv.FieldByName("TypeUrl")
+	val := sv.FieldByName("Value")
+	if !turl.IsValid() || !val.IsValid() {
+		return true, errors.New("proto: invalid google.protobuf.Any message")
+	}
+
+	b, ok := val.Interface().([]byte)
+	if !ok {
+		return true, errors.New("proto: invalid google.protobuf.Any message")
+	}
+
+	parts := strings.Split(turl.String(), "/")
+	mt := MessageType(parts[len(parts)-1])
+	if mt == nil {
+		return false, nil
+	}
+	m := reflect.New(mt.Elem())
+	if err := Unmarshal(b, m.Interface().(Message)); err != nil {
+		return false, nil
+	}
+	w.Write([]byte("["))
+	u := turl.String()
+	if requiresQuotes(u) {
+		writeString(w, u)
+	} else {
+		w.Write([]byte(u))
+	}
+	if w.compact {
+		w.Write([]byte("]:<"))
+	} else {
+		w.Write([]byte("]: <\n"))
+		w.ind++
+	}
+	if err := tm.writeStruct(w, m.Elem()); err != nil {
+		return true, err
+	}
+	if w.compact {
+		w.Write([]byte("> "))
+	} else {
+		w.ind--
+		w.Write([]byte(">\n"))
+	}
+	return true, nil
+}
+
+func (tm *TextMarshaler) writeStruct(w *textWriter, sv reflect.Value) error {
+	if tm.ExpandAny && isAny(sv) {
+		if canExpand, err := tm.writeProto3Any(w, sv); canExpand {
+			return err
+		}
+	}
+	st := sv.Type()
+	sprops := GetProperties(st)
+	for i := 0; i < sv.NumField(); i++ {
+		fv := sv.Field(i)
+		props := sprops.Prop[i]
+		name := st.Field(i).Name
+
+		if strings.HasPrefix(name, "XXX_") {
+			// There are two XXX_ fields:
+			//   XXX_unrecognized []byte
+			//   XXX_extensions   map[int32]proto.Extension
+			// The first is handled here;
+			// the second is handled at the bottom of this function.
+			if name == "XXX_unrecognized" && !fv.IsNil() {
+				if err := writeUnknownStruct(w, fv.Interface().([]byte)); err != nil {
+					return err
+				}
+			}
+			continue
+		}
+		if fv.Kind() == reflect.Ptr && fv.IsNil() {
+			// Field not filled in. This could be an optional field or
+			// a required field that wasn't filled in. Either way, there
+			// isn't anything we can show for it.
+			continue
+		}
+		if fv.Kind() == reflect.Slice && fv.IsNil() {
+			// Repeated field that is empty, or a bytes field that is unused.
+			continue
+		}
+
+		if props.Repeated && fv.Kind() == reflect.Slice {
+			// Repeated field.
+			for j := 0; j < fv.Len(); j++ {
+				if err := writeName(w, props); err != nil {
+					return err
+				}
+				if !w.compact {
+					if err := w.WriteByte(' '); err != nil {
+						return err
+					}
+				}
+				v := fv.Index(j)
+				if v.Kind() == reflect.Ptr && v.IsNil() {
+					// A nil message in a repeated field is not valid,
+					// but we can handle that more gracefully than panicking.
+					if _, err := w.Write([]byte("<nil>\n")); err != nil {
+						return err
+					}
+					continue
+				}
+				if err := tm.writeAny(w, v, props); err != nil {
+					return err
+				}
+				if err := w.WriteByte('\n'); err != nil {
+					return err
+				}
+			}
+			continue
+		}
+		if fv.Kind() == reflect.Map {
+			// Map fields are rendered as a repeated struct with key/value fields.
+			keys := fv.MapKeys()
+			sort.Sort(mapKeys(keys))
+			for _, key := range keys {
+				val := fv.MapIndex(key)
+				if err := writeName(w, props); err != nil {
+					return err
+				}
+				if !w.compact {
+					if err := w.WriteByte(' '); err != nil {
+						return err
+					}
+				}
+				// open struct
+				if err := w.WriteByte('<'); err != nil {
+					return err
+				}
+				if !w.compact {
+					if err := w.WriteByte('\n'); err != nil {
+						return err
+					}
+				}
+				w.indent()
+				// key
+				if _, err := w.WriteString("key:"); err != nil {
+					return err
+				}
+				if !w.compact {
+					if err := w.WriteByte(' '); err != nil {
+						return err
+					}
+				}
+				if err := tm.writeAny(w, key, props.mkeyprop); err != nil {
+					return err
+				}
+				if err := w.WriteByte('\n'); err != nil {
+					return err
+				}
+				// nil values aren't legal, but we can avoid panicking because of them.
+				if val.Kind() != reflect.Ptr || !val.IsNil() {
+					// value
+					if _, err := w.WriteString("value:"); err != nil {
+						return err
+					}
+					if !w.compact {
+						if err := w.WriteByte(' '); err != nil {
+							return err
+						}
+					}
+					if err := tm.writeAny(w, val, props.mvalprop); err != nil {
+						return err
+					}
+					if err := w.WriteByte('\n'); err != nil {
+						return err
+					}
+				}
+				// close struct
+				w.unindent()
+				if err := w.WriteByte('>'); err != nil {
+					return err
+				}
+				if err := w.WriteByte('\n'); err != nil {
+					return err
+				}
+			}
+			continue
+		}
+		if props.proto3 && fv.Kind() == reflect.Slice && fv.Len() == 0 {
+			// empty bytes field
+			continue
+		}
+		if fv.Kind() != reflect.Ptr && fv.Kind() != reflect.Slice {
+			// proto3 non-repeated scalar field; skip if zero value
+			if isProto3Zero(fv) {
+				continue
+			}
+		}
+
+		if fv.Kind() == reflect.Interface {
+			// Check if it is a oneof.
+			if st.Field(i).Tag.Get("protobuf_oneof") != "" {
+				// fv is nil, or holds a pointer to generated struct.
+				// That generated struct has exactly one field,
+				// which has a protobuf struct tag.
+				if fv.IsNil() {
+					continue
+				}
+				inner := fv.Elem().Elem() // interface -> *T -> T
+				tag := inner.Type().Field(0).Tag.Get("protobuf")
+				props = new(Properties) // Overwrite the outer props var, but not its pointee.
+				props.Parse(tag)
+				// Write the value in the oneof, not the oneof itself.
+				fv = inner.Field(0)
+
+				// Special case to cope with malformed messages gracefully:
+				// If the value in the oneof is a nil pointer, don't panic
+				// in writeAny.
+				if fv.Kind() == reflect.Ptr && fv.IsNil() {
+					// Use errors.New so writeAny won't render quotes.
+					msg := errors.New("/* nil */")
+					fv = reflect.ValueOf(&msg).Elem()
+				}
+			}
+		}
+
+		if err := writeName(w, props); err != nil {
+			return err
+		}
+		if !w.compact {
+			if err := w.WriteByte(' '); err != nil {
+				return err
+			}
+		}
+		if b, ok := fv.Interface().(raw); ok {
+			if err := writeRaw(w, b.Bytes()); err != nil {
+				return err
+			}
+			continue
+		}
+
+		// Enums have a String method, so writeAny will work fine.
+		if err := tm.writeAny(w, fv, props); err != nil {
+			return err
+		}
+
+		if err := w.WriteByte('\n'); err != nil {
+			return err
+		}
+	}
+
+	// Extensions (the XXX_extensions field).
+	pv := sv.Addr()
+	if _, ok := extendable(pv.Interface()); ok {
+		if err := tm.writeExtensions(w, pv); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// writeRaw writes an uninterpreted raw message.
+func writeRaw(w *textWriter, b []byte) error {
+	if err := w.WriteByte('<'); err != nil {
+		return err
+	}
+	if !w.compact {
+		if err := w.WriteByte('\n'); err != nil {
+			return err
+		}
+	}
+	w.indent()
+	if err := writeUnknownStruct(w, b); err != nil {
+		return err
+	}
+	w.unindent()
+	if err := w.WriteByte('>'); err != nil {
+		return err
+	}
+	return nil
+}
+
+// writeAny writes an arbitrary field.
+func (tm *TextMarshaler) writeAny(w *textWriter, v reflect.Value, props *Properties) error {
+	v = reflect.Indirect(v)
+
+	// Floats have special cases.
+	if v.Kind() == reflect.Float32 || v.Kind() == reflect.Float64 {
+		x := v.Float()
+		var b []byte
+		switch {
+		case math.IsInf(x, 1):
+			b = posInf
+		case math.IsInf(x, -1):
+			b = negInf
+		case math.IsNaN(x):
+			b = nan
+		}
+		if b != nil {
+			_, err := w.Write(b)
+			return err
+		}
+		// Other values are handled below.
+	}
+
+	// We don't attempt to serialise every possible value type; only those
+	// that can occur in protocol buffers.
+	switch v.Kind() {
+	case reflect.Slice:
+		// Should only be a []byte; repeated fields are handled in writeStruct.
+		if err := writeString(w, string(v.Bytes())); err != nil {
+			return err
+		}
+	case reflect.String:
+		if err := writeString(w, v.String()); err != nil {
+			return err
+		}
+	case reflect.Struct:
+		// Required/optional group/message.
+		var bra, ket byte = '<', '>'
+		if props != nil && props.Wire == "group" {
+			bra, ket = '{', '}'
+		}
+		if err := w.WriteByte(bra); err != nil {
+			return err
+		}
+		if !w.compact {
+			if err := w.WriteByte('\n'); err != nil {
+				return err
+			}
+		}
+		w.indent()
+		if etm, ok := v.Interface().(encoding.TextMarshaler); ok {
+			text, err := etm.MarshalText()
+			if err != nil {
+				return err
+			}
+			if _, err = w.Write(text); err != nil {
+				return err
+			}
+		} else if err := tm.writeStruct(w, v); err != nil {
+			return err
+		}
+		w.unindent()
+		if err := w.WriteByte(ket); err != nil {
+			return err
+		}
+	default:
+		_, err := fmt.Fprint(w, v.Interface())
+		return err
+	}
+	return nil
+}
+
+// equivalent to C's isprint.
+func isprint(c byte) bool {
+	return c >= 0x20 && c < 0x7f
+}
+
+// writeString writes a string in the protocol buffer text format.
+// It is similar to strconv.Quote except we don't use Go escape sequences,
+// we treat the string as a byte sequence, and we use octal escapes.
+// These differences are to maintain interoperability with the other
+// languages' implementations of the text format.
+func writeString(w *textWriter, s string) error {
+	// use WriteByte here to get any needed indent
+	if err := w.WriteByte('"'); err != nil {
+		return err
+	}
+	// Loop over the bytes, not the runes.
+	for i := 0; i < len(s); i++ {
+		var err error
+		// Divergence from C++: we don't escape apostrophes.
+		// There's no need to escape them, and the C++ parser
+		// copes with a naked apostrophe.
+		switch c := s[i]; c {
+		case '\n':
+			_, err = w.w.Write(backslashN)
+		case '\r':
+			_, err = w.w.Write(backslashR)
+		case '\t':
+			_, err = w.w.Write(backslashT)
+		case '"':
+			_, err = w.w.Write(backslashDQ)
+		case '\\':
+			_, err = w.w.Write(backslashBS)
+		default:
+			if isprint(c) {
+				err = w.w.WriteByte(c)
+			} else {
+				_, err = fmt.Fprintf(w.w, "\\%03o", c)
+			}
+		}
+		if err != nil {
+			return err
+		}
+	}
+	return w.WriteByte('"')
+}
+
+func writeUnknownStruct(w *textWriter, data []byte) (err error) {
+	if !w.compact {
+		if _, err := fmt.Fprintf(w, "/* %d unknown bytes */\n", len(data)); err != nil {
+			return err
+		}
+	}
+	b := NewBuffer(data)
+	for b.index < len(b.buf) {
+		x, err := b.DecodeVarint()
+		if err != nil {
+			_, err := fmt.Fprintf(w, "/* %v */\n", err)
+			return err
+		}
+		wire, tag := x&7, x>>3
+		if wire == WireEndGroup {
+			w.unindent()
+			if _, err := w.Write(endBraceNewline); err != nil {
+				return err
+			}
+			continue
+		}
+		if _, err := fmt.Fprint(w, tag); err != nil {
+			return err
+		}
+		if wire != WireStartGroup {
+			if err := w.WriteByte(':'); err != nil {
+				return err
+			}
+		}
+		if !w.compact || wire == WireStartGroup {
+			if err := w.WriteByte(' '); err != nil {
+				return err
+			}
+		}
+		switch wire {
+		case WireBytes:
+			buf, e := b.DecodeRawBytes(false)
+			if e == nil {
+				_, err = fmt.Fprintf(w, "%q", buf)
+			} else {
+				_, err = fmt.Fprintf(w, "/* %v */", e)
+			}
+		case WireFixed32:
+			x, err = b.DecodeFixed32()
+			err = writeUnknownInt(w, x, err)
+		case WireFixed64:
+			x, err = b.DecodeFixed64()
+			err = writeUnknownInt(w, x, err)
+		case WireStartGroup:
+			err = w.WriteByte('{')
+			w.indent()
+		case WireVarint:
+			x, err = b.DecodeVarint()
+			err = writeUnknownInt(w, x, err)
+		default:
+			_, err = fmt.Fprintf(w, "/* unknown wire type %d */", wire)
+		}
+		if err != nil {
+			return err
+		}
+		if err = w.WriteByte('\n'); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func writeUnknownInt(w *textWriter, x uint64, err error) error {
+	if err == nil {
+		_, err = fmt.Fprint(w, x)
+	} else {
+		_, err = fmt.Fprintf(w, "/* %v */", err)
+	}
+	return err
+}
+
+type int32Slice []int32
+
+func (s int32Slice) Len() int           { return len(s) }
+func (s int32Slice) Less(i, j int) bool { return s[i] < s[j] }
+func (s int32Slice) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
+
+// writeExtensions writes all the extensions in pv.
+// pv is assumed to be a pointer to a protocol message struct that is extendable.
+func (tm *TextMarshaler) writeExtensions(w *textWriter, pv reflect.Value) error {
+	emap := extensionMaps[pv.Type().Elem()]
+	ep, _ := extendable(pv.Interface())
+
+	// Order the extensions by ID.
+	// This isn't strictly necessary, but it will give us
+	// canonical output, which will also make testing easier.
+	m, mu := ep.extensionsRead()
+	if m == nil {
+		return nil
+	}
+	mu.Lock()
+	ids := make([]int32, 0, len(m))
+	for id := range m {
+		ids = append(ids, id)
+	}
+	sort.Sort(int32Slice(ids))
+	mu.Unlock()
+
+	for _, extNum := range ids {
+		ext := m[extNum]
+		var desc *ExtensionDesc
+		if emap != nil {
+			desc = emap[extNum]
+		}
+		if desc == nil {
+			// Unknown extension.
+			if err := writeUnknownStruct(w, ext.enc); err != nil {
+				return err
+			}
+			continue
+		}
+
+		pb, err := GetExtension(ep, desc)
+		if err != nil {
+			return fmt.Errorf("failed getting extension: %v", err)
+		}
+
+		// Repeated extensions will appear as a slice.
+		if !desc.repeated() {
+			if err := tm.writeExtension(w, desc.Name, pb); err != nil {
+				return err
+			}
+		} else {
+			v := reflect.ValueOf(pb)
+			for i := 0; i < v.Len(); i++ {
+				if err := tm.writeExtension(w, desc.Name, v.Index(i).Interface()); err != nil {
+					return err
+				}
+			}
+		}
+	}
+	return nil
+}
+
+func (tm *TextMarshaler) writeExtension(w *textWriter, name string, pb interface{}) error {
+	if _, err := fmt.Fprintf(w, "[%s]:", name); err != nil {
+		return err
+	}
+	if !w.compact {
+		if err := w.WriteByte(' '); err != nil {
+			return err
+		}
+	}
+	if err := tm.writeAny(w, reflect.ValueOf(pb), nil); err != nil {
+		return err
+	}
+	if err := w.WriteByte('\n'); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (w *textWriter) writeIndent() {
+	if !w.complete {
+		return
+	}
+	remain := w.ind * 2
+	for remain > 0 {
+		n := remain
+		if n > len(spaces) {
+			n = len(spaces)
+		}
+		w.w.Write(spaces[:n])
+		remain -= n
+	}
+	w.complete = false
+}
+
+// TextMarshaler is a configurable text format marshaler.
+type TextMarshaler struct {
+	Compact   bool // use compact text format (one line).
+	ExpandAny bool // expand google.protobuf.Any messages of known types
+}
+
+// Marshal writes a given protocol buffer in text format.
+// The only errors returned are from w.
+func (tm *TextMarshaler) Marshal(w io.Writer, pb Message) error {
+	val := reflect.ValueOf(pb)
+	if pb == nil || val.IsNil() {
+		w.Write([]byte("<nil>"))
+		return nil
+	}
+	var bw *bufio.Writer
+	ww, ok := w.(writer)
+	if !ok {
+		bw = bufio.NewWriter(w)
+		ww = bw
+	}
+	aw := &textWriter{
+		w:        ww,
+		complete: true,
+		compact:  tm.Compact,
+	}
+
+	if etm, ok := pb.(encoding.TextMarshaler); ok {
+		text, err := etm.MarshalText()
+		if err != nil {
+			return err
+		}
+		if _, err = aw.Write(text); err != nil {
+			return err
+		}
+		if bw != nil {
+			return bw.Flush()
+		}
+		return nil
+	}
+	// Dereference the received pointer so we don't have outer < and >.
+	v := reflect.Indirect(val)
+	if err := tm.writeStruct(aw, v); err != nil {
+		return err
+	}
+	if bw != nil {
+		return bw.Flush()
+	}
+	return nil
+}
+
+// Text is the same as Marshal, but returns the string directly.
+func (tm *TextMarshaler) Text(pb Message) string {
+	var buf bytes.Buffer
+	tm.Marshal(&buf, pb)
+	return buf.String()
+}
+
+var (
+	defaultTextMarshaler = TextMarshaler{}
+	compactTextMarshaler = TextMarshaler{Compact: true}
+)
+
+// TODO: consider removing some of the Marshal functions below.
+
+// MarshalText writes a given protocol buffer in text format.
+// The only errors returned are from w.
+func MarshalText(w io.Writer, pb Message) error { return defaultTextMarshaler.Marshal(w, pb) }
+
+// MarshalTextString is the same as MarshalText, but returns the string directly.
+func MarshalTextString(pb Message) string { return defaultTextMarshaler.Text(pb) }
+
+// CompactText writes a given protocol buffer in compact text format (one line).
+func CompactText(w io.Writer, pb Message) error { return compactTextMarshaler.Marshal(w, pb) }
+
+// CompactTextString is the same as CompactText, but returns the string directly.
+func CompactTextString(pb Message) string { return compactTextMarshaler.Text(pb) }
diff --git a/vendor/github.com/golang/protobuf/proto/text_parser.go b/vendor/github.com/golang/protobuf/proto/text_parser.go
new file mode 100644
index 000000000..5e14513f2
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/text_parser.go
@@ -0,0 +1,895 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2010 The Go Authors.  All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package proto
+
+// Functions for parsing the Text protocol buffer format.
+// TODO: message sets.
+
+import (
+	"encoding"
+	"errors"
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+	"unicode/utf8"
+)
+
+// Error string emitted when deserializing Any and fields are already set
+const anyRepeatedlyUnpacked = "Any message unpacked multiple times, or %q already set"
+
+type ParseError struct {
+	Message string
+	Line    int // 1-based line number
+	Offset  int // 0-based byte offset from start of input
+}
+
+func (p *ParseError) Error() string {
+	if p.Line == 1 {
+		// show offset only for first line
+		return fmt.Sprintf("line 1.%d: %v", p.Offset, p.Message)
+	}
+	return fmt.Sprintf("line %d: %v", p.Line, p.Message)
+}
+
+type token struct {
+	value    string
+	err      *ParseError
+	line     int    // line number
+	offset   int    // byte number from start of input, not start of line
+	unquoted string // the unquoted version of value, if it was a quoted string
+}
+
+func (t *token) String() string {
+	if t.err == nil {
+		return fmt.Sprintf("%q (line=%d, offset=%d)", t.value, t.line, t.offset)
+	}
+	return fmt.Sprintf("parse error: %v", t.err)
+}
+
+type textParser struct {
+	s            string // remaining input
+	done         bool   // whether the parsing is finished (success or error)
+	backed       bool   // whether back() was called
+	offset, line int
+	cur          token
+}
+
+func newTextParser(s string) *textParser {
+	p := new(textParser)
+	p.s = s
+	p.line = 1
+	p.cur.line = 1
+	return p
+}
+
+func (p *textParser) errorf(format string, a ...interface{}) *ParseError {
+	pe := &ParseError{fmt.Sprintf(format, a...), p.cur.line, p.cur.offset}
+	p.cur.err = pe
+	p.done = true
+	return pe
+}
+
+// Numbers and identifiers are matched by [-+._A-Za-z0-9]
+func isIdentOrNumberChar(c byte) bool {
+	switch {
+	case 'A' <= c && c <= 'Z', 'a' <= c && c <= 'z':
+		return true
+	case '0' <= c && c <= '9':
+		return true
+	}
+	switch c {
+	case '-', '+', '.', '_':
+		return true
+	}
+	return false
+}
+
+func isWhitespace(c byte) bool {
+	switch c {
+	case ' ', '\t', '\n', '\r':
+		return true
+	}
+	return false
+}
+
+func isQuote(c byte) bool {
+	switch c {
+	case '"', '\'':
+		return true
+	}
+	return false
+}
+
+func (p *textParser) skipWhitespace() {
+	i := 0
+	for i < len(p.s) && (isWhitespace(p.s[i]) || p.s[i] == '#') {
+		if p.s[i] == '#' {
+			// comment; skip to end of line or input
+			for i < len(p.s) && p.s[i] != '\n' {
+				i++
+			}
+			if i == len(p.s) {
+				break
+			}
+		}
+		if p.s[i] == '\n' {
+			p.line++
+		}
+		i++
+	}
+	p.offset += i
+	p.s = p.s[i:len(p.s)]
+	if len(p.s) == 0 {
+		p.done = true
+	}
+}
+
+func (p *textParser) advance() {
+	// Skip whitespace
+	p.skipWhitespace()
+	if p.done {
+		return
+	}
+
+	// Start of non-whitespace
+	p.cur.err = nil
+	p.cur.offset, p.cur.line = p.offset, p.line
+	p.cur.unquoted = ""
+	switch p.s[0] {
+	case '<', '>', '{', '}', ':', '[', ']', ';', ',', '/':
+		// Single symbol
+		p.cur.value, p.s = p.s[0:1], p.s[1:len(p.s)]
+	case '"', '\'':
+		// Quoted string
+		i := 1
+		for i < len(p.s) && p.s[i] != p.s[0] && p.s[i] != '\n' {
+			if p.s[i] == '\\' && i+1 < len(p.s) {
+				// skip escaped char
+				i++
+			}
+			i++
+		}
+		if i >= len(p.s) || p.s[i] != p.s[0] {
+			p.errorf("unmatched quote")
+			return
+		}
+		unq, err := unquoteC(p.s[1:i], rune(p.s[0]))
+		if err != nil {
+			p.errorf("invalid quoted string %s: %v", p.s[0:i+1], err)
+			return
+		}
+		p.cur.value, p.s = p.s[0:i+1], p.s[i+1:len(p.s)]
+		p.cur.unquoted = unq
+	default:
+		i := 0
+		for i < len(p.s) && isIdentOrNumberChar(p.s[i]) {
+			i++
+		}
+		if i == 0 {
+			p.errorf("unexpected byte %#x", p.s[0])
+			return
+		}
+		p.cur.value, p.s = p.s[0:i], p.s[i:len(p.s)]
+	}
+	p.offset += len(p.cur.value)
+}
+
+var (
+	errBadUTF8 = errors.New("proto: bad UTF-8")
+	errBadHex  = errors.New("proto: bad hexadecimal")
+)
+
+func unquoteC(s string, quote rune) (string, error) {
+	// This is based on C++'s tokenizer.cc.
+	// Despite its name, this is *not* parsing C syntax.
+	// For instance, "\0" is an invalid quoted string.
+
+	// Avoid allocation in trivial cases.
+	simple := true
+	for _, r := range s {
+		if r == '\\' || r == quote {
+			simple = false
+			break
+		}
+	}
+	if simple {
+		return s, nil
+	}
+
+	buf := make([]byte, 0, 3*len(s)/2)
+	for len(s) > 0 {
+		r, n := utf8.DecodeRuneInString(s)
+		if r == utf8.RuneError && n == 1 {
+			return "", errBadUTF8
+		}
+		s = s[n:]
+		if r != '\\' {
+			if r < utf8.RuneSelf {
+				buf = append(buf, byte(r))
+			} else {
+				buf = append(buf, string(r)...)
+			}
+			continue
+		}
+
+		ch, tail, err := unescape(s)
+		if err != nil {
+			return "", err
+		}
+		buf = append(buf, ch...)
+		s = tail
+	}
+	return string(buf), nil
+}
+
+func unescape(s string) (ch string, tail string, err error) {
+	r, n := utf8.DecodeRuneInString(s)
+	if r == utf8.RuneError && n == 1 {
+		return "", "", errBadUTF8
+	}
+	s = s[n:]
+	switch r {
+	case 'a':
+		return "\a", s, nil
+	case 'b':
+		return "\b", s, nil
+	case 'f':
+		return "\f", s, nil
+	case 'n':
+		return "\n", s, nil
+	case 'r':
+		return "\r", s, nil
+	case 't':
+		return "\t", s, nil
+	case 'v':
+		return "\v", s, nil
+	case '?':
+		return "?", s, nil // trigraph workaround
+	case '\'', '"', '\\':
+		return string(r), s, nil
+	case '0', '1', '2', '3', '4', '5', '6', '7', 'x', 'X':
+		if len(s) < 2 {
+			return "", "", fmt.Errorf(`\%c requires 2 following digits`, r)
+		}
+		base := 8
+		ss := s[:2]
+		s = s[2:]
+		if r == 'x' || r == 'X' {
+			base = 16
+		} else {
+			ss = string(r) + ss
+		}
+		i, err := strconv.ParseUint(ss, base, 8)
+		if err != nil {
+			return "", "", err
+		}
+		return string([]byte{byte(i)}), s, nil
+	case 'u', 'U':
+		n := 4
+		if r == 'U' {
+			n = 8
+		}
+		if len(s) < n {
+			return "", "", fmt.Errorf(`\%c requires %d digits`, r, n)
+		}
+
+		bs := make([]byte, n/2)
+		for i := 0; i < n; i += 2 {
+			a, ok1 := unhex(s[i])
+			b, ok2 := unhex(s[i+1])
+			if !ok1 || !ok2 {
+				return "", "", errBadHex
+			}
+			bs[i/2] = a<<4 | b
+		}
+		s = s[n:]
+		return string(bs), s, nil
+	}
+	return "", "", fmt.Errorf(`unknown escape \%c`, r)
+}
+
+// Adapted from src/pkg/strconv/quote.go.
+func unhex(b byte) (v byte, ok bool) {
+	switch {
+	case '0' <= b && b <= '9':
+		return b - '0', true
+	case 'a' <= b && b <= 'f':
+		return b - 'a' + 10, true
+	case 'A' <= b && b <= 'F':
+		return b - 'A' + 10, true
+	}
+	return 0, false
+}
+
+// Back off the parser by one token. Can only be done between calls to next().
+// It makes the next advance() a no-op.
+func (p *textParser) back() { p.backed = true }
+
+// Advances the parser and returns the new current token.
+func (p *textParser) next() *token {
+	if p.backed || p.done {
+		p.backed = false
+		return &p.cur
+	}
+	p.advance()
+	if p.done {
+		p.cur.value = ""
+	} else if len(p.cur.value) > 0 && isQuote(p.cur.value[0]) {
+		// Look for multiple quoted strings separated by whitespace,
+		// and concatenate them.
+		cat := p.cur
+		for {
+			p.skipWhitespace()
+			if p.done || !isQuote(p.s[0]) {
+				break
+			}
+			p.advance()
+			if p.cur.err != nil {
+				return &p.cur
+			}
+			cat.value += " " + p.cur.value
+			cat.unquoted += p.cur.unquoted
+		}
+		p.done = false // parser may have seen EOF, but we want to return cat
+		p.cur = cat
+	}
+	return &p.cur
+}
+
+func (p *textParser) consumeToken(s string) error {
+	tok := p.next()
+	if tok.err != nil {
+		return tok.err
+	}
+	if tok.value != s {
+		p.back()
+		return p.errorf("expected %q, found %q", s, tok.value)
+	}
+	return nil
+}
+
+// Return a RequiredNotSetError indicating which required field was not set.
+func (p *textParser) missingRequiredFieldError(sv reflect.Value) *RequiredNotSetError {
+	st := sv.Type()
+	sprops := GetProperties(st)
+	for i := 0; i < st.NumField(); i++ {
+		if !isNil(sv.Field(i)) {
+			continue
+		}
+
+		props := sprops.Prop[i]
+		if props.Required {
+			return &RequiredNotSetError{fmt.Sprintf("%v.%v", st, props.OrigName)}
+		}
+	}
+	return &RequiredNotSetError{fmt.Sprintf("%v.<unknown field name>", st)} // should not happen
+}
+
+// Returns the index in the struct for the named field, as well as the parsed tag properties.
+func structFieldByName(sprops *StructProperties, name string) (int, *Properties, bool) {
+	i, ok := sprops.decoderOrigNames[name]
+	if ok {
+		return i, sprops.Prop[i], true
+	}
+	return -1, nil, false
+}
+
+// Consume a ':' from the input stream (if the next token is a colon),
+// returning an error if a colon is needed but not present.
+func (p *textParser) checkForColon(props *Properties, typ reflect.Type) *ParseError {
+	tok := p.next()
+	if tok.err != nil {
+		return tok.err
+	}
+	if tok.value != ":" {
+		// Colon is optional when the field is a group or message.
+		needColon := true
+		switch props.Wire {
+		case "group":
+			needColon = false
+		case "bytes":
+			// A "bytes" field is either a message, a string, or a repeated field;
+			// those three become *T, *string and []T respectively, so we can check for
+			// this field being a pointer to a non-string.
+			if typ.Kind() == reflect.Ptr {
+				// *T or *string
+				if typ.Elem().Kind() == reflect.String {
+					break
+				}
+			} else if typ.Kind() == reflect.Slice {
+				// []T or []*T
+				if typ.Elem().Kind() != reflect.Ptr {
+					break
+				}
+			} else if typ.Kind() == reflect.String {
+				// The proto3 exception is for a string field,
+				// which requires a colon.
+				break
+			}
+			needColon = false
+		}
+		if needColon {
+			return p.errorf("expected ':', found %q", tok.value)
+		}
+		p.back()
+	}
+	return nil
+}
+
+func (p *textParser) readStruct(sv reflect.Value, terminator string) error {
+	st := sv.Type()
+	sprops := GetProperties(st)
+	reqCount := sprops.reqCount
+	var reqFieldErr error
+	fieldSet := make(map[string]bool)
+	// A struct is a sequence of "name: value", terminated by one of
+	// '>' or '}', or the end of the input.  A name may also be
+	// "[extension]" or "[type/url]".
+	//
+	// The whole struct can also be an expanded Any message, like:
+	// [type/url] < ... struct contents ... >
+	for {
+		tok := p.next()
+		if tok.err != nil {
+			return tok.err
+		}
+		if tok.value == terminator {
+			break
+		}
+		if tok.value == "[" {
+			// Looks like an extension or an Any.
+			//
+			// TODO: Check whether we need to handle
+			// namespace rooted names (e.g. ".something.Foo").
+			extName, err := p.consumeExtName()
+			if err != nil {
+				return err
+			}
+
+			if s := strings.LastIndex(extName, "/"); s >= 0 {
+				// If it contains a slash, it's an Any type URL.
+				messageName := extName[s+1:]
+				mt := MessageType(messageName)
+				if mt == nil {
+					return p.errorf("unrecognized message %q in google.protobuf.Any", messageName)
+				}
+				tok = p.next()
+				if tok.err != nil {
+					return tok.err
+				}
+				// consume an optional colon
+				if tok.value == ":" {
+					tok = p.next()
+					if tok.err != nil {
+						return tok.err
+					}
+				}
+				var terminator string
+				switch tok.value {
+				case "<":
+					terminator = ">"
+				case "{":
+					terminator = "}"
+				default:
+					return p.errorf("expected '{' or '<', found %q", tok.value)
+				}
+				v := reflect.New(mt.Elem())
+				if pe := p.readStruct(v.Elem(), terminator); pe != nil {
+					return pe
+				}
+				b, err := Marshal(v.Interface().(Message))
+				if err != nil {
+					return p.errorf("failed to marshal message of type %q: %v", messageName, err)
+				}
+				if fieldSet["type_url"] {
+					return p.errorf(anyRepeatedlyUnpacked, "type_url")
+				}
+				if fieldSet["value"] {
+					return p.errorf(anyRepeatedlyUnpacked, "value")
+				}
+				sv.FieldByName("TypeUrl").SetString(extName)
+				sv.FieldByName("Value").SetBytes(b)
+				fieldSet["type_url"] = true
+				fieldSet["value"] = true
+				continue
+			}
+
+			var desc *ExtensionDesc
+			// This could be faster, but it's functional.
+			// TODO: Do something smarter than a linear scan.
+			for _, d := range RegisteredExtensions(reflect.New(st).Interface().(Message)) {
+				if d.Name == extName {
+					desc = d
+					break
+				}
+			}
+			if desc == nil {
+				return p.errorf("unrecognized extension %q", extName)
+			}
+
+			props := &Properties{}
+			props.Parse(desc.Tag)
+
+			typ := reflect.TypeOf(desc.ExtensionType)
+			if err := p.checkForColon(props, typ); err != nil {
+				return err
+			}
+
+			rep := desc.repeated()
+
+			// Read the extension structure, and set it in
+			// the value we're constructing.
+			var ext reflect.Value
+			if !rep {
+				ext = reflect.New(typ).Elem()
+			} else {
+				ext = reflect.New(typ.Elem()).Elem()
+			}
+			if err := p.readAny(ext, props); err != nil {
+				if _, ok := err.(*RequiredNotSetError); !ok {
+					return err
+				}
+				reqFieldErr = err
+			}
+			ep := sv.Addr().Interface().(Message)
+			if !rep {
+				SetExtension(ep, desc, ext.Interface())
+			} else {
+				old, err := GetExtension(ep, desc)
+				var sl reflect.Value
+				if err == nil {
+					sl = reflect.ValueOf(old) // existing slice
+				} else {
+					sl = reflect.MakeSlice(typ, 0, 1)
+				}
+				sl = reflect.Append(sl, ext)
+				SetExtension(ep, desc, sl.Interface())
+			}
+			if err := p.consumeOptionalSeparator(); err != nil {
+				return err
+			}
+			continue
+		}
+
+		// This is a normal, non-extension field.
+		name := tok.value
+		var dst reflect.Value
+		fi, props, ok := structFieldByName(sprops, name)
+		if ok {
+			dst = sv.Field(fi)
+		} else if oop, ok := sprops.OneofTypes[name]; ok {
+			// It is a oneof.
+			props = oop.Prop
+			nv := reflect.New(oop.Type.Elem())
+			dst = nv.Elem().Field(0)
+			field := sv.Field(oop.Field)
+			if !field.IsNil() {
+				return p.errorf("field '%s' would overwrite already parsed oneof '%s'", name, sv.Type().Field(oop.Field).Name)
+			}
+			field.Set(nv)
+		}
+		if !dst.IsValid() {
+			return p.errorf("unknown field name %q in %v", name, st)
+		}
+
+		if dst.Kind() == reflect.Map {
+			// Consume any colon.
+			if err := p.checkForColon(props, dst.Type()); err != nil {
+				return err
+			}
+
+			// Construct the map if it doesn't already exist.
+			if dst.IsNil() {
+				dst.Set(reflect.MakeMap(dst.Type()))
+			}
+			key := reflect.New(dst.Type().Key()).Elem()
+			val := reflect.New(dst.Type().Elem()).Elem()
+
+			// The map entry should be this sequence of tokens:
+			//	< key : KEY value : VALUE >
+			// However, implementations may omit key or value, and technically
+			// we should support them in any order.  See b/28924776 for a time
+			// this went wrong.
+
+			tok := p.next()
+			var terminator string
+			switch tok.value {
+			case "<":
+				terminator = ">"
+			case "{":
+				terminator = "}"
+			default:
+				return p.errorf("expected '{' or '<', found %q", tok.value)
+			}
+			for {
+				tok := p.next()
+				if tok.err != nil {
+					return tok.err
+				}
+				if tok.value == terminator {
+					break
+				}
+				switch tok.value {
+				case "key":
+					if err := p.consumeToken(":"); err != nil {
+						return err
+					}
+					if err := p.readAny(key, props.mkeyprop); err != nil {
+						return err
+					}
+					if err := p.consumeOptionalSeparator(); err != nil {
+						return err
+					}
+				case "value":
+					if err := p.checkForColon(props.mvalprop, dst.Type().Elem()); err != nil {
+						return err
+					}
+					if err := p.readAny(val, props.mvalprop); err != nil {
+						return err
+					}
+					if err := p.consumeOptionalSeparator(); err != nil {
+						return err
+					}
+				default:
+					p.back()
+					return p.errorf(`expected "key", "value", or %q, found %q`, terminator, tok.value)
+				}
+			}
+
+			dst.SetMapIndex(key, val)
+			continue
+		}
+
+		// Check that it's not already set if it's not a repeated field.
+		if !props.Repeated && fieldSet[name] {
+			return p.errorf("non-repeated field %q was repeated", name)
+		}
+
+		if err := p.checkForColon(props, dst.Type()); err != nil {
+			return err
+		}
+
+		// Parse into the field.
+		fieldSet[name] = true
+		if err := p.readAny(dst, props); err != nil {
+			if _, ok := err.(*RequiredNotSetError); !ok {
+				return err
+			}
+			reqFieldErr = err
+		}
+		if props.Required {
+			reqCount--
+		}
+
+		if err := p.consumeOptionalSeparator(); err != nil {
+			return err
+		}
+
+	}
+
+	if reqCount > 0 {
+		return p.missingRequiredFieldError(sv)
+	}
+	return reqFieldErr
+}
+
+// consumeExtName consumes extension name or expanded Any type URL and the
+// following ']'. It returns the name or URL consumed.
+func (p *textParser) consumeExtName() (string, error) {
+	tok := p.next()
+	if tok.err != nil {
+		return "", tok.err
+	}
+
+	// If extension name or type url is quoted, it's a single token.
+	if len(tok.value) > 2 && isQuote(tok.value[0]) && tok.value[len(tok.value)-1] == tok.value[0] {
+		name, err := unquoteC(tok.value[1:len(tok.value)-1], rune(tok.value[0]))
+		if err != nil {
+			return "", err
+		}
+		return name, p.consumeToken("]")
+	}
+
+	// Consume everything up to "]"
+	var parts []string
+	for tok.value != "]" {
+		parts = append(parts, tok.value)
+		tok = p.next()
+		if tok.err != nil {
+			return "", p.errorf("unrecognized type_url or extension name: %s", tok.err)
+		}
+	}
+	return strings.Join(parts, ""), nil
+}
+
+// consumeOptionalSeparator consumes an optional semicolon or comma.
+// It is used in readStruct to provide backward compatibility.
+func (p *textParser) consumeOptionalSeparator() error {
+	tok := p.next()
+	if tok.err != nil {
+		return tok.err
+	}
+	if tok.value != ";" && tok.value != "," {
+		p.back()
+	}
+	return nil
+}
+
+func (p *textParser) readAny(v reflect.Value, props *Properties) error {
+	tok := p.next()
+	if tok.err != nil {
+		return tok.err
+	}
+	if tok.value == "" {
+		return p.errorf("unexpected EOF")
+	}
+
+	switch fv := v; fv.Kind() {
+	case reflect.Slice:
+		at := v.Type()
+		if at.Elem().Kind() == reflect.Uint8 {
+			// Special case for []byte
+			if tok.value[0] != '"' && tok.value[0] != '\'' {
+				// Deliberately written out here, as the error after
+				// this switch statement would write "invalid []byte: ...",
+				// which is not as user-friendly.
+				return p.errorf("invalid string: %v", tok.value)
+			}
+			bytes := []byte(tok.unquoted)
+			fv.Set(reflect.ValueOf(bytes))
+			return nil
+		}
+		// Repeated field.
+		if tok.value == "[" {
+			// Repeated field with list notation, like [1,2,3].
+			for {
+				fv.Set(reflect.Append(fv, reflect.New(at.Elem()).Elem()))
+				err := p.readAny(fv.Index(fv.Len()-1), props)
+				if err != nil {
+					return err
+				}
+				tok := p.next()
+				if tok.err != nil {
+					return tok.err
+				}
+				if tok.value == "]" {
+					break
+				}
+				if tok.value != "," {
+					return p.errorf("Expected ']' or ',' found %q", tok.value)
+				}
+			}
+			return nil
+		}
+		// One value of the repeated field.
+		p.back()
+		fv.Set(reflect.Append(fv, reflect.New(at.Elem()).Elem()))
+		return p.readAny(fv.Index(fv.Len()-1), props)
+	case reflect.Bool:
+		// true/1/t/True or false/f/0/False.
+		switch tok.value {
+		case "true", "1", "t", "True":
+			fv.SetBool(true)
+			return nil
+		case "false", "0", "f", "False":
+			fv.SetBool(false)
+			return nil
+		}
+	case reflect.Float32, reflect.Float64:
+		v := tok.value
+		// Ignore 'f' for compatibility with output generated by C++, but don't
+		// remove 'f' when the value is "-inf" or "inf".
+		if strings.HasSuffix(v, "f") && tok.value != "-inf" && tok.value != "inf" {
+			v = v[:len(v)-1]
+		}
+		if f, err := strconv.ParseFloat(v, fv.Type().Bits()); err == nil {
+			fv.SetFloat(f)
+			return nil
+		}
+	case reflect.Int32:
+		if x, err := strconv.ParseInt(tok.value, 0, 32); err == nil {
+			fv.SetInt(x)
+			return nil
+		}
+
+		if len(props.Enum) == 0 {
+			break
+		}
+		m, ok := enumValueMaps[props.Enum]
+		if !ok {
+			break
+		}
+		x, ok := m[tok.value]
+		if !ok {
+			break
+		}
+		fv.SetInt(int64(x))
+		return nil
+	case reflect.Int64:
+		if x, err := strconv.ParseInt(tok.value, 0, 64); err == nil {
+			fv.SetInt(x)
+			return nil
+		}
+
+	case reflect.Ptr:
+		// A basic field (indirected through pointer), or a repeated message/group
+		p.back()
+		fv.Set(reflect.New(fv.Type().Elem()))
+		return p.readAny(fv.Elem(), props)
+	case reflect.String:
+		if tok.value[0] == '"' || tok.value[0] == '\'' {
+			fv.SetString(tok.unquoted)
+			return nil
+		}
+	case reflect.Struct:
+		var terminator string
+		switch tok.value {
+		case "{":
+			terminator = "}"
+		case "<":
+			terminator = ">"
+		default:
+			return p.errorf("expected '{' or '<', found %q", tok.value)
+		}
+		// TODO: Handle nested messages which implement encoding.TextUnmarshaler.
+		return p.readStruct(fv, terminator)
+	case reflect.Uint32:
+		if x, err := strconv.ParseUint(tok.value, 0, 32); err == nil {
+			fv.SetUint(x)
+			return nil
+		}
+	case reflect.Uint64:
+		if x, err := strconv.ParseUint(tok.value, 0, 64); err == nil {
+			fv.SetUint(x)
+			return nil
+		}
+	}
+	return p.errorf("invalid %v: %v", v.Type(), tok.value)
+}
+
+// UnmarshalText reads a protocol buffer in Text format. UnmarshalText resets pb
+// before starting to unmarshal, so any existing data in pb is always removed.
+// If a required field is not set and no other error occurs,
+// UnmarshalText returns *RequiredNotSetError.
+func UnmarshalText(s string, pb Message) error {
+	if um, ok := pb.(encoding.TextUnmarshaler); ok {
+		err := um.UnmarshalText([]byte(s))
+		return err
+	}
+	pb.Reset()
+	v := reflect.ValueOf(pb)
+	if pe := newTextParser(s).readStruct(v.Elem(), ""); pe != nil {
+		return pe
+	}
+	return nil
+}
diff --git a/vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/Makefile b/vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/Makefile
new file mode 100644
index 000000000..41a2d04d0
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/Makefile
@@ -0,0 +1,36 @@
+# Go support for Protocol Buffers - Google's data interchange format
+#
+# Copyright 2010 The Go Authors.  All rights reserved.
+# https://github.com/golang/protobuf
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Not stored here, but descriptor.proto is in https://github.com/google/protobuf/
+# at src/google/protobuf/descriptor.proto
+regenerate:
+	@echo WARNING! THIS RULE IS PROBABLY NOT RIGHT FOR YOUR INSTALLATION
+	protoc --go_out=../../../../.. -I$(HOME)/src/protobuf/include $(HOME)/src/protobuf/include/google/protobuf/descriptor.proto
diff --git a/vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/descriptor.pb.go b/vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/descriptor.pb.go
new file mode 100644
index 000000000..63cf2c80a
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/protoc-gen-go/descriptor/descriptor.pb.go
@@ -0,0 +1,2152 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google/protobuf/descriptor.proto
+
+/*
+Package descriptor is a generated protocol buffer package.
+
+It is generated from these files:
+	google/protobuf/descriptor.proto
+
+It has these top-level messages:
+	FileDescriptorSet
+	FileDescriptorProto
+	DescriptorProto
+	FieldDescriptorProto
+	OneofDescriptorProto
+	EnumDescriptorProto
+	EnumValueDescriptorProto
+	ServiceDescriptorProto
+	MethodDescriptorProto
+	FileOptions
+	MessageOptions
+	FieldOptions
+	OneofOptions
+	EnumOptions
+	EnumValueOptions
+	ServiceOptions
+	MethodOptions
+	UninterpretedOption
+	SourceCodeInfo
+	GeneratedCodeInfo
+*/
+package descriptor
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type FieldDescriptorProto_Type int32
+
+const (
+	// 0 is reserved for errors.
+	// Order is weird for historical reasons.
+	FieldDescriptorProto_TYPE_DOUBLE FieldDescriptorProto_Type = 1
+	FieldDescriptorProto_TYPE_FLOAT  FieldDescriptorProto_Type = 2
+	// Not ZigZag encoded.  Negative numbers take 10 bytes.  Use TYPE_SINT64 if
+	// negative values are likely.
+	FieldDescriptorProto_TYPE_INT64  FieldDescriptorProto_Type = 3
+	FieldDescriptorProto_TYPE_UINT64 FieldDescriptorProto_Type = 4
+	// Not ZigZag encoded.  Negative numbers take 10 bytes.  Use TYPE_SINT32 if
+	// negative values are likely.
+	FieldDescriptorProto_TYPE_INT32   FieldDescriptorProto_Type = 5
+	FieldDescriptorProto_TYPE_FIXED64 FieldDescriptorProto_Type = 6
+	FieldDescriptorProto_TYPE_FIXED32 FieldDescriptorProto_Type = 7
+	FieldDescriptorProto_TYPE_BOOL    FieldDescriptorProto_Type = 8
+	FieldDescriptorProto_TYPE_STRING  FieldDescriptorProto_Type = 9
+	// Tag-delimited aggregate.
+	// Group type is deprecated and not supported in proto3. However, Proto3
+	// implementations should still be able to parse the group wire format and
+	// treat group fields as unknown fields.
+	FieldDescriptorProto_TYPE_GROUP   FieldDescriptorProto_Type = 10
+	FieldDescriptorProto_TYPE_MESSAGE FieldDescriptorProto_Type = 11
+	// New in version 2.
+	FieldDescriptorProto_TYPE_BYTES    FieldDescriptorProto_Type = 12
+	FieldDescriptorProto_TYPE_UINT32   FieldDescriptorProto_Type = 13
+	FieldDescriptorProto_TYPE_ENUM     FieldDescriptorProto_Type = 14
+	FieldDescriptorProto_TYPE_SFIXED32 FieldDescriptorProto_Type = 15
+	FieldDescriptorProto_TYPE_SFIXED64 FieldDescriptorProto_Type = 16
+	FieldDescriptorProto_TYPE_SINT32   FieldDescriptorProto_Type = 17
+	FieldDescriptorProto_TYPE_SINT64   FieldDescriptorProto_Type = 18
+)
+
+var FieldDescriptorProto_Type_name = map[int32]string{
+	1:  "TYPE_DOUBLE",
+	2:  "TYPE_FLOAT",
+	3:  "TYPE_INT64",
+	4:  "TYPE_UINT64",
+	5:  "TYPE_INT32",
+	6:  "TYPE_FIXED64",
+	7:  "TYPE_FIXED32",
+	8:  "TYPE_BOOL",
+	9:  "TYPE_STRING",
+	10: "TYPE_GROUP",
+	11: "TYPE_MESSAGE",
+	12: "TYPE_BYTES",
+	13: "TYPE_UINT32",
+	14: "TYPE_ENUM",
+	15: "TYPE_SFIXED32",
+	16: "TYPE_SFIXED64",
+	17: "TYPE_SINT32",
+	18: "TYPE_SINT64",
+}
+var FieldDescriptorProto_Type_value = map[string]int32{
+	"TYPE_DOUBLE":   1,
+	"TYPE_FLOAT":    2,
+	"TYPE_INT64":    3,
+	"TYPE_UINT64":   4,
+	"TYPE_INT32":    5,
+	"TYPE_FIXED64":  6,
+	"TYPE_FIXED32":  7,
+	"TYPE_BOOL":     8,
+	"TYPE_STRING":   9,
+	"TYPE_GROUP":    10,
+	"TYPE_MESSAGE":  11,
+	"TYPE_BYTES":    12,
+	"TYPE_UINT32":   13,
+	"TYPE_ENUM":     14,
+	"TYPE_SFIXED32": 15,
+	"TYPE_SFIXED64": 16,
+	"TYPE_SINT32":   17,
+	"TYPE_SINT64":   18,
+}
+
+func (x FieldDescriptorProto_Type) Enum() *FieldDescriptorProto_Type {
+	p := new(FieldDescriptorProto_Type)
+	*p = x
+	return p
+}
+func (x FieldDescriptorProto_Type) String() string {
+	return proto.EnumName(FieldDescriptorProto_Type_name, int32(x))
+}
+func (x *FieldDescriptorProto_Type) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(FieldDescriptorProto_Type_value, data, "FieldDescriptorProto_Type")
+	if err != nil {
+		return err
+	}
+	*x = FieldDescriptorProto_Type(value)
+	return nil
+}
+func (FieldDescriptorProto_Type) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{3, 0} }
+
+type FieldDescriptorProto_Label int32
+
+const (
+	// 0 is reserved for errors
+	FieldDescriptorProto_LABEL_OPTIONAL FieldDescriptorProto_Label = 1
+	FieldDescriptorProto_LABEL_REQUIRED FieldDescriptorProto_Label = 2
+	FieldDescriptorProto_LABEL_REPEATED FieldDescriptorProto_Label = 3
+)
+
+var FieldDescriptorProto_Label_name = map[int32]string{
+	1: "LABEL_OPTIONAL",
+	2: "LABEL_REQUIRED",
+	3: "LABEL_REPEATED",
+}
+var FieldDescriptorProto_Label_value = map[string]int32{
+	"LABEL_OPTIONAL": 1,
+	"LABEL_REQUIRED": 2,
+	"LABEL_REPEATED": 3,
+}
+
+func (x FieldDescriptorProto_Label) Enum() *FieldDescriptorProto_Label {
+	p := new(FieldDescriptorProto_Label)
+	*p = x
+	return p
+}
+func (x FieldDescriptorProto_Label) String() string {
+	return proto.EnumName(FieldDescriptorProto_Label_name, int32(x))
+}
+func (x *FieldDescriptorProto_Label) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(FieldDescriptorProto_Label_value, data, "FieldDescriptorProto_Label")
+	if err != nil {
+		return err
+	}
+	*x = FieldDescriptorProto_Label(value)
+	return nil
+}
+func (FieldDescriptorProto_Label) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor0, []int{3, 1}
+}
+
+// Generated classes can be optimized for speed or code size.
+type FileOptions_OptimizeMode int32
+
+const (
+	FileOptions_SPEED FileOptions_OptimizeMode = 1
+	// etc.
+	FileOptions_CODE_SIZE    FileOptions_OptimizeMode = 2
+	FileOptions_LITE_RUNTIME FileOptions_OptimizeMode = 3
+)
+
+var FileOptions_OptimizeMode_name = map[int32]string{
+	1: "SPEED",
+	2: "CODE_SIZE",
+	3: "LITE_RUNTIME",
+}
+var FileOptions_OptimizeMode_value = map[string]int32{
+	"SPEED":        1,
+	"CODE_SIZE":    2,
+	"LITE_RUNTIME": 3,
+}
+
+func (x FileOptions_OptimizeMode) Enum() *FileOptions_OptimizeMode {
+	p := new(FileOptions_OptimizeMode)
+	*p = x
+	return p
+}
+func (x FileOptions_OptimizeMode) String() string {
+	return proto.EnumName(FileOptions_OptimizeMode_name, int32(x))
+}
+func (x *FileOptions_OptimizeMode) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(FileOptions_OptimizeMode_value, data, "FileOptions_OptimizeMode")
+	if err != nil {
+		return err
+	}
+	*x = FileOptions_OptimizeMode(value)
+	return nil
+}
+func (FileOptions_OptimizeMode) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{9, 0} }
+
+type FieldOptions_CType int32
+
+const (
+	// Default mode.
+	FieldOptions_STRING       FieldOptions_CType = 0
+	FieldOptions_CORD         FieldOptions_CType = 1
+	FieldOptions_STRING_PIECE FieldOptions_CType = 2
+)
+
+var FieldOptions_CType_name = map[int32]string{
+	0: "STRING",
+	1: "CORD",
+	2: "STRING_PIECE",
+}
+var FieldOptions_CType_value = map[string]int32{
+	"STRING":       0,
+	"CORD":         1,
+	"STRING_PIECE": 2,
+}
+
+func (x FieldOptions_CType) Enum() *FieldOptions_CType {
+	p := new(FieldOptions_CType)
+	*p = x
+	return p
+}
+func (x FieldOptions_CType) String() string {
+	return proto.EnumName(FieldOptions_CType_name, int32(x))
+}
+func (x *FieldOptions_CType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(FieldOptions_CType_value, data, "FieldOptions_CType")
+	if err != nil {
+		return err
+	}
+	*x = FieldOptions_CType(value)
+	return nil
+}
+func (FieldOptions_CType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{11, 0} }
+
+type FieldOptions_JSType int32
+
+const (
+	// Use the default type.
+	FieldOptions_JS_NORMAL FieldOptions_JSType = 0
+	// Use JavaScript strings.
+	FieldOptions_JS_STRING FieldOptions_JSType = 1
+	// Use JavaScript numbers.
+	FieldOptions_JS_NUMBER FieldOptions_JSType = 2
+)
+
+var FieldOptions_JSType_name = map[int32]string{
+	0: "JS_NORMAL",
+	1: "JS_STRING",
+	2: "JS_NUMBER",
+}
+var FieldOptions_JSType_value = map[string]int32{
+	"JS_NORMAL": 0,
+	"JS_STRING": 1,
+	"JS_NUMBER": 2,
+}
+
+func (x FieldOptions_JSType) Enum() *FieldOptions_JSType {
+	p := new(FieldOptions_JSType)
+	*p = x
+	return p
+}
+func (x FieldOptions_JSType) String() string {
+	return proto.EnumName(FieldOptions_JSType_name, int32(x))
+}
+func (x *FieldOptions_JSType) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(FieldOptions_JSType_value, data, "FieldOptions_JSType")
+	if err != nil {
+		return err
+	}
+	*x = FieldOptions_JSType(value)
+	return nil
+}
+func (FieldOptions_JSType) EnumDescriptor() ([]byte, []int) { return fileDescriptor0, []int{11, 1} }
+
+// Is this method side-effect-free (or safe in HTTP parlance), or idempotent,
+// or neither? HTTP based RPC implementation may choose GET verb for safe
+// methods, and PUT verb for idempotent methods instead of the default POST.
+type MethodOptions_IdempotencyLevel int32
+
+const (
+	MethodOptions_IDEMPOTENCY_UNKNOWN MethodOptions_IdempotencyLevel = 0
+	MethodOptions_NO_SIDE_EFFECTS     MethodOptions_IdempotencyLevel = 1
+	MethodOptions_IDEMPOTENT          MethodOptions_IdempotencyLevel = 2
+)
+
+var MethodOptions_IdempotencyLevel_name = map[int32]string{
+	0: "IDEMPOTENCY_UNKNOWN",
+	1: "NO_SIDE_EFFECTS",
+	2: "IDEMPOTENT",
+}
+var MethodOptions_IdempotencyLevel_value = map[string]int32{
+	"IDEMPOTENCY_UNKNOWN": 0,
+	"NO_SIDE_EFFECTS":     1,
+	"IDEMPOTENT":          2,
+}
+
+func (x MethodOptions_IdempotencyLevel) Enum() *MethodOptions_IdempotencyLevel {
+	p := new(MethodOptions_IdempotencyLevel)
+	*p = x
+	return p
+}
+func (x MethodOptions_IdempotencyLevel) String() string {
+	return proto.EnumName(MethodOptions_IdempotencyLevel_name, int32(x))
+}
+func (x *MethodOptions_IdempotencyLevel) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(MethodOptions_IdempotencyLevel_value, data, "MethodOptions_IdempotencyLevel")
+	if err != nil {
+		return err
+	}
+	*x = MethodOptions_IdempotencyLevel(value)
+	return nil
+}
+func (MethodOptions_IdempotencyLevel) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor0, []int{16, 0}
+}
+
+// The protocol compiler can output a FileDescriptorSet containing the .proto
+// files it parses.
+type FileDescriptorSet struct {
+	File             []*FileDescriptorProto `protobuf:"bytes,1,rep,name=file" json:"file,omitempty"`
+	XXX_unrecognized []byte                 `json:"-"`
+}
+
+func (m *FileDescriptorSet) Reset()                    { *m = FileDescriptorSet{} }
+func (m *FileDescriptorSet) String() string            { return proto.CompactTextString(m) }
+func (*FileDescriptorSet) ProtoMessage()               {}
+func (*FileDescriptorSet) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+func (m *FileDescriptorSet) GetFile() []*FileDescriptorProto {
+	if m != nil {
+		return m.File
+	}
+	return nil
+}
+
+// Describes a complete .proto file.
+type FileDescriptorProto struct {
+	Name    *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Package *string `protobuf:"bytes,2,opt,name=package" json:"package,omitempty"`
+	// Names of files imported by this file.
+	Dependency []string `protobuf:"bytes,3,rep,name=dependency" json:"dependency,omitempty"`
+	// Indexes of the public imported files in the dependency list above.
+	PublicDependency []int32 `protobuf:"varint,10,rep,name=public_dependency,json=publicDependency" json:"public_dependency,omitempty"`
+	// Indexes of the weak imported files in the dependency list.
+	// For Google-internal migration only. Do not use.
+	WeakDependency []int32 `protobuf:"varint,11,rep,name=weak_dependency,json=weakDependency" json:"weak_dependency,omitempty"`
+	// All top-level definitions in this file.
+	MessageType []*DescriptorProto        `protobuf:"bytes,4,rep,name=message_type,json=messageType" json:"message_type,omitempty"`
+	EnumType    []*EnumDescriptorProto    `protobuf:"bytes,5,rep,name=enum_type,json=enumType" json:"enum_type,omitempty"`
+	Service     []*ServiceDescriptorProto `protobuf:"bytes,6,rep,name=service" json:"service,omitempty"`
+	Extension   []*FieldDescriptorProto   `protobuf:"bytes,7,rep,name=extension" json:"extension,omitempty"`
+	Options     *FileOptions              `protobuf:"bytes,8,opt,name=options" json:"options,omitempty"`
+	// This field contains optional information about the original source code.
+	// You may safely remove this entire field without harming runtime
+	// functionality of the descriptors -- the information is needed only by
+	// development tools.
+	SourceCodeInfo *SourceCodeInfo `protobuf:"bytes,9,opt,name=source_code_info,json=sourceCodeInfo" json:"source_code_info,omitempty"`
+	// The syntax of the proto file.
+	// The supported values are "proto2" and "proto3".
+	Syntax           *string `protobuf:"bytes,12,opt,name=syntax" json:"syntax,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *FileDescriptorProto) Reset()                    { *m = FileDescriptorProto{} }
+func (m *FileDescriptorProto) String() string            { return proto.CompactTextString(m) }
+func (*FileDescriptorProto) ProtoMessage()               {}
+func (*FileDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+func (m *FileDescriptorProto) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *FileDescriptorProto) GetPackage() string {
+	if m != nil && m.Package != nil {
+		return *m.Package
+	}
+	return ""
+}
+
+func (m *FileDescriptorProto) GetDependency() []string {
+	if m != nil {
+		return m.Dependency
+	}
+	return nil
+}
+
+func (m *FileDescriptorProto) GetPublicDependency() []int32 {
+	if m != nil {
+		return m.PublicDependency
+	}
+	return nil
+}
+
+func (m *FileDescriptorProto) GetWeakDependency() []int32 {
+	if m != nil {
+		return m.WeakDependency
+	}
+	return nil
+}
+
+func (m *FileDescriptorProto) GetMessageType() []*DescriptorProto {
+	if m != nil {
+		return m.MessageType
+	}
+	return nil
+}
+
+func (m *FileDescriptorProto) GetEnumType() []*EnumDescriptorProto {
+	if m != nil {
+		return m.EnumType
+	}
+	return nil
+}
+
+func (m *FileDescriptorProto) GetService() []*ServiceDescriptorProto {
+	if m != nil {
+		return m.Service
+	}
+	return nil
+}
+
+func (m *FileDescriptorProto) GetExtension() []*FieldDescriptorProto {
+	if m != nil {
+		return m.Extension
+	}
+	return nil
+}
+
+func (m *FileDescriptorProto) GetOptions() *FileOptions {
+	if m != nil {
+		return m.Options
+	}
+	return nil
+}
+
+func (m *FileDescriptorProto) GetSourceCodeInfo() *SourceCodeInfo {
+	if m != nil {
+		return m.SourceCodeInfo
+	}
+	return nil
+}
+
+func (m *FileDescriptorProto) GetSyntax() string {
+	if m != nil && m.Syntax != nil {
+		return *m.Syntax
+	}
+	return ""
+}
+
+// Describes a message type.
+type DescriptorProto struct {
+	Name           *string                           `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Field          []*FieldDescriptorProto           `protobuf:"bytes,2,rep,name=field" json:"field,omitempty"`
+	Extension      []*FieldDescriptorProto           `protobuf:"bytes,6,rep,name=extension" json:"extension,omitempty"`
+	NestedType     []*DescriptorProto                `protobuf:"bytes,3,rep,name=nested_type,json=nestedType" json:"nested_type,omitempty"`
+	EnumType       []*EnumDescriptorProto            `protobuf:"bytes,4,rep,name=enum_type,json=enumType" json:"enum_type,omitempty"`
+	ExtensionRange []*DescriptorProto_ExtensionRange `protobuf:"bytes,5,rep,name=extension_range,json=extensionRange" json:"extension_range,omitempty"`
+	OneofDecl      []*OneofDescriptorProto           `protobuf:"bytes,8,rep,name=oneof_decl,json=oneofDecl" json:"oneof_decl,omitempty"`
+	Options        *MessageOptions                   `protobuf:"bytes,7,opt,name=options" json:"options,omitempty"`
+	ReservedRange  []*DescriptorProto_ReservedRange  `protobuf:"bytes,9,rep,name=reserved_range,json=reservedRange" json:"reserved_range,omitempty"`
+	// Reserved field names, which may not be used by fields in the same message.
+	// A given name may only be reserved once.
+	ReservedName     []string `protobuf:"bytes,10,rep,name=reserved_name,json=reservedName" json:"reserved_name,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *DescriptorProto) Reset()                    { *m = DescriptorProto{} }
+func (m *DescriptorProto) String() string            { return proto.CompactTextString(m) }
+func (*DescriptorProto) ProtoMessage()               {}
+func (*DescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{2} }
+
+func (m *DescriptorProto) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *DescriptorProto) GetField() []*FieldDescriptorProto {
+	if m != nil {
+		return m.Field
+	}
+	return nil
+}
+
+func (m *DescriptorProto) GetExtension() []*FieldDescriptorProto {
+	if m != nil {
+		return m.Extension
+	}
+	return nil
+}
+
+func (m *DescriptorProto) GetNestedType() []*DescriptorProto {
+	if m != nil {
+		return m.NestedType
+	}
+	return nil
+}
+
+func (m *DescriptorProto) GetEnumType() []*EnumDescriptorProto {
+	if m != nil {
+		return m.EnumType
+	}
+	return nil
+}
+
+func (m *DescriptorProto) GetExtensionRange() []*DescriptorProto_ExtensionRange {
+	if m != nil {
+		return m.ExtensionRange
+	}
+	return nil
+}
+
+func (m *DescriptorProto) GetOneofDecl() []*OneofDescriptorProto {
+	if m != nil {
+		return m.OneofDecl
+	}
+	return nil
+}
+
+func (m *DescriptorProto) GetOptions() *MessageOptions {
+	if m != nil {
+		return m.Options
+	}
+	return nil
+}
+
+func (m *DescriptorProto) GetReservedRange() []*DescriptorProto_ReservedRange {
+	if m != nil {
+		return m.ReservedRange
+	}
+	return nil
+}
+
+func (m *DescriptorProto) GetReservedName() []string {
+	if m != nil {
+		return m.ReservedName
+	}
+	return nil
+}
+
+type DescriptorProto_ExtensionRange struct {
+	Start            *int32 `protobuf:"varint,1,opt,name=start" json:"start,omitempty"`
+	End              *int32 `protobuf:"varint,2,opt,name=end" json:"end,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *DescriptorProto_ExtensionRange) Reset()         { *m = DescriptorProto_ExtensionRange{} }
+func (m *DescriptorProto_ExtensionRange) String() string { return proto.CompactTextString(m) }
+func (*DescriptorProto_ExtensionRange) ProtoMessage()    {}
+func (*DescriptorProto_ExtensionRange) Descriptor() ([]byte, []int) {
+	return fileDescriptor0, []int{2, 0}
+}
+
+func (m *DescriptorProto_ExtensionRange) GetStart() int32 {
+	if m != nil && m.Start != nil {
+		return *m.Start
+	}
+	return 0
+}
+
+func (m *DescriptorProto_ExtensionRange) GetEnd() int32 {
+	if m != nil && m.End != nil {
+		return *m.End
+	}
+	return 0
+}
+
+// Range of reserved tag numbers. Reserved tag numbers may not be used by
+// fields or extension ranges in the same message. Reserved ranges may
+// not overlap.
+type DescriptorProto_ReservedRange struct {
+	Start            *int32 `protobuf:"varint,1,opt,name=start" json:"start,omitempty"`
+	End              *int32 `protobuf:"varint,2,opt,name=end" json:"end,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *DescriptorProto_ReservedRange) Reset()         { *m = DescriptorProto_ReservedRange{} }
+func (m *DescriptorProto_ReservedRange) String() string { return proto.CompactTextString(m) }
+func (*DescriptorProto_ReservedRange) ProtoMessage()    {}
+func (*DescriptorProto_ReservedRange) Descriptor() ([]byte, []int) {
+	return fileDescriptor0, []int{2, 1}
+}
+
+func (m *DescriptorProto_ReservedRange) GetStart() int32 {
+	if m != nil && m.Start != nil {
+		return *m.Start
+	}
+	return 0
+}
+
+func (m *DescriptorProto_ReservedRange) GetEnd() int32 {
+	if m != nil && m.End != nil {
+		return *m.End
+	}
+	return 0
+}
+
+// Describes a field within a message.
+type FieldDescriptorProto struct {
+	Name   *string                     `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Number *int32                      `protobuf:"varint,3,opt,name=number" json:"number,omitempty"`
+	Label  *FieldDescriptorProto_Label `protobuf:"varint,4,opt,name=label,enum=google.protobuf.FieldDescriptorProto_Label" json:"label,omitempty"`
+	// If type_name is set, this need not be set.  If both this and type_name
+	// are set, this must be one of TYPE_ENUM, TYPE_MESSAGE or TYPE_GROUP.
+	Type *FieldDescriptorProto_Type `protobuf:"varint,5,opt,name=type,enum=google.protobuf.FieldDescriptorProto_Type" json:"type,omitempty"`
+	// For message and enum types, this is the name of the type.  If the name
+	// starts with a '.', it is fully-qualified.  Otherwise, C++-like scoping
+	// rules are used to find the type (i.e. first the nested types within this
+	// message are searched, then within the parent, on up to the root
+	// namespace).
+	TypeName *string `protobuf:"bytes,6,opt,name=type_name,json=typeName" json:"type_name,omitempty"`
+	// For extensions, this is the name of the type being extended.  It is
+	// resolved in the same manner as type_name.
+	Extendee *string `protobuf:"bytes,2,opt,name=extendee" json:"extendee,omitempty"`
+	// For numeric types, contains the original text representation of the value.
+	// For booleans, "true" or "false".
+	// For strings, contains the default text contents (not escaped in any way).
+	// For bytes, contains the C escaped value.  All bytes >= 128 are escaped.
+	// TODO(kenton):  Base-64 encode?
+	DefaultValue *string `protobuf:"bytes,7,opt,name=default_value,json=defaultValue" json:"default_value,omitempty"`
+	// If set, gives the index of a oneof in the containing type's oneof_decl
+	// list.  This field is a member of that oneof.
+	OneofIndex *int32 `protobuf:"varint,9,opt,name=oneof_index,json=oneofIndex" json:"oneof_index,omitempty"`
+	// JSON name of this field. The value is set by protocol compiler. If the
+	// user has set a "json_name" option on this field, that option's value
+	// will be used. Otherwise, it's deduced from the field's name by converting
+	// it to camelCase.
+	JsonName         *string       `protobuf:"bytes,10,opt,name=json_name,json=jsonName" json:"json_name,omitempty"`
+	Options          *FieldOptions `protobuf:"bytes,8,opt,name=options" json:"options,omitempty"`
+	XXX_unrecognized []byte        `json:"-"`
+}
+
+func (m *FieldDescriptorProto) Reset()                    { *m = FieldDescriptorProto{} }
+func (m *FieldDescriptorProto) String() string            { return proto.CompactTextString(m) }
+func (*FieldDescriptorProto) ProtoMessage()               {}
+func (*FieldDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{3} }
+
+func (m *FieldDescriptorProto) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *FieldDescriptorProto) GetNumber() int32 {
+	if m != nil && m.Number != nil {
+		return *m.Number
+	}
+	return 0
+}
+
+func (m *FieldDescriptorProto) GetLabel() FieldDescriptorProto_Label {
+	if m != nil && m.Label != nil {
+		return *m.Label
+	}
+	return FieldDescriptorProto_LABEL_OPTIONAL
+}
+
+func (m *FieldDescriptorProto) GetType() FieldDescriptorProto_Type {
+	if m != nil && m.Type != nil {
+		return *m.Type
+	}
+	return FieldDescriptorProto_TYPE_DOUBLE
+}
+
+func (m *FieldDescriptorProto) GetTypeName() string {
+	if m != nil && m.TypeName != nil {
+		return *m.TypeName
+	}
+	return ""
+}
+
+func (m *FieldDescriptorProto) GetExtendee() string {
+	if m != nil && m.Extendee != nil {
+		return *m.Extendee
+	}
+	return ""
+}
+
+func (m *FieldDescriptorProto) GetDefaultValue() string {
+	if m != nil && m.DefaultValue != nil {
+		return *m.DefaultValue
+	}
+	return ""
+}
+
+func (m *FieldDescriptorProto) GetOneofIndex() int32 {
+	if m != nil && m.OneofIndex != nil {
+		return *m.OneofIndex
+	}
+	return 0
+}
+
+func (m *FieldDescriptorProto) GetJsonName() string {
+	if m != nil && m.JsonName != nil {
+		return *m.JsonName
+	}
+	return ""
+}
+
+func (m *FieldDescriptorProto) GetOptions() *FieldOptions {
+	if m != nil {
+		return m.Options
+	}
+	return nil
+}
+
+// Describes a oneof.
+type OneofDescriptorProto struct {
+	Name             *string       `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Options          *OneofOptions `protobuf:"bytes,2,opt,name=options" json:"options,omitempty"`
+	XXX_unrecognized []byte        `json:"-"`
+}
+
+func (m *OneofDescriptorProto) Reset()                    { *m = OneofDescriptorProto{} }
+func (m *OneofDescriptorProto) String() string            { return proto.CompactTextString(m) }
+func (*OneofDescriptorProto) ProtoMessage()               {}
+func (*OneofDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{4} }
+
+func (m *OneofDescriptorProto) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *OneofDescriptorProto) GetOptions() *OneofOptions {
+	if m != nil {
+		return m.Options
+	}
+	return nil
+}
+
+// Describes an enum type.
+type EnumDescriptorProto struct {
+	Name             *string                     `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Value            []*EnumValueDescriptorProto `protobuf:"bytes,2,rep,name=value" json:"value,omitempty"`
+	Options          *EnumOptions                `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"`
+	XXX_unrecognized []byte                      `json:"-"`
+}
+
+func (m *EnumDescriptorProto) Reset()                    { *m = EnumDescriptorProto{} }
+func (m *EnumDescriptorProto) String() string            { return proto.CompactTextString(m) }
+func (*EnumDescriptorProto) ProtoMessage()               {}
+func (*EnumDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
+
+func (m *EnumDescriptorProto) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *EnumDescriptorProto) GetValue() []*EnumValueDescriptorProto {
+	if m != nil {
+		return m.Value
+	}
+	return nil
+}
+
+func (m *EnumDescriptorProto) GetOptions() *EnumOptions {
+	if m != nil {
+		return m.Options
+	}
+	return nil
+}
+
+// Describes a value within an enum.
+type EnumValueDescriptorProto struct {
+	Name             *string           `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Number           *int32            `protobuf:"varint,2,opt,name=number" json:"number,omitempty"`
+	Options          *EnumValueOptions `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"`
+	XXX_unrecognized []byte            `json:"-"`
+}
+
+func (m *EnumValueDescriptorProto) Reset()                    { *m = EnumValueDescriptorProto{} }
+func (m *EnumValueDescriptorProto) String() string            { return proto.CompactTextString(m) }
+func (*EnumValueDescriptorProto) ProtoMessage()               {}
+func (*EnumValueDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
+
+func (m *EnumValueDescriptorProto) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *EnumValueDescriptorProto) GetNumber() int32 {
+	if m != nil && m.Number != nil {
+		return *m.Number
+	}
+	return 0
+}
+
+func (m *EnumValueDescriptorProto) GetOptions() *EnumValueOptions {
+	if m != nil {
+		return m.Options
+	}
+	return nil
+}
+
+// Describes a service.
+type ServiceDescriptorProto struct {
+	Name             *string                  `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	Method           []*MethodDescriptorProto `protobuf:"bytes,2,rep,name=method" json:"method,omitempty"`
+	Options          *ServiceOptions          `protobuf:"bytes,3,opt,name=options" json:"options,omitempty"`
+	XXX_unrecognized []byte                   `json:"-"`
+}
+
+func (m *ServiceDescriptorProto) Reset()                    { *m = ServiceDescriptorProto{} }
+func (m *ServiceDescriptorProto) String() string            { return proto.CompactTextString(m) }
+func (*ServiceDescriptorProto) ProtoMessage()               {}
+func (*ServiceDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
+
+func (m *ServiceDescriptorProto) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *ServiceDescriptorProto) GetMethod() []*MethodDescriptorProto {
+	if m != nil {
+		return m.Method
+	}
+	return nil
+}
+
+func (m *ServiceDescriptorProto) GetOptions() *ServiceOptions {
+	if m != nil {
+		return m.Options
+	}
+	return nil
+}
+
+// Describes a method of a service.
+type MethodDescriptorProto struct {
+	Name *string `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
+	// Input and output type names.  These are resolved in the same way as
+	// FieldDescriptorProto.type_name, but must refer to a message type.
+	InputType  *string        `protobuf:"bytes,2,opt,name=input_type,json=inputType" json:"input_type,omitempty"`
+	OutputType *string        `protobuf:"bytes,3,opt,name=output_type,json=outputType" json:"output_type,omitempty"`
+	Options    *MethodOptions `protobuf:"bytes,4,opt,name=options" json:"options,omitempty"`
+	// Identifies if client streams multiple client messages
+	ClientStreaming *bool `protobuf:"varint,5,opt,name=client_streaming,json=clientStreaming,def=0" json:"client_streaming,omitempty"`
+	// Identifies if server streams multiple server messages
+	ServerStreaming  *bool  `protobuf:"varint,6,opt,name=server_streaming,json=serverStreaming,def=0" json:"server_streaming,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *MethodDescriptorProto) Reset()                    { *m = MethodDescriptorProto{} }
+func (m *MethodDescriptorProto) String() string            { return proto.CompactTextString(m) }
+func (*MethodDescriptorProto) ProtoMessage()               {}
+func (*MethodDescriptorProto) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
+
+const Default_MethodDescriptorProto_ClientStreaming bool = false
+const Default_MethodDescriptorProto_ServerStreaming bool = false
+
+func (m *MethodDescriptorProto) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *MethodDescriptorProto) GetInputType() string {
+	if m != nil && m.InputType != nil {
+		return *m.InputType
+	}
+	return ""
+}
+
+func (m *MethodDescriptorProto) GetOutputType() string {
+	if m != nil && m.OutputType != nil {
+		return *m.OutputType
+	}
+	return ""
+}
+
+func (m *MethodDescriptorProto) GetOptions() *MethodOptions {
+	if m != nil {
+		return m.Options
+	}
+	return nil
+}
+
+func (m *MethodDescriptorProto) GetClientStreaming() bool {
+	if m != nil && m.ClientStreaming != nil {
+		return *m.ClientStreaming
+	}
+	return Default_MethodDescriptorProto_ClientStreaming
+}
+
+func (m *MethodDescriptorProto) GetServerStreaming() bool {
+	if m != nil && m.ServerStreaming != nil {
+		return *m.ServerStreaming
+	}
+	return Default_MethodDescriptorProto_ServerStreaming
+}
+
+type FileOptions struct {
+	// Sets the Java package where classes generated from this .proto will be
+	// placed.  By default, the proto package is used, but this is often
+	// inappropriate because proto packages do not normally start with backwards
+	// domain names.
+	JavaPackage *string `protobuf:"bytes,1,opt,name=java_package,json=javaPackage" json:"java_package,omitempty"`
+	// If set, all the classes from the .proto file are wrapped in a single
+	// outer class with the given name.  This applies to both Proto1
+	// (equivalent to the old "--one_java_file" option) and Proto2 (where
+	// a .proto always translates to a single class, but you may want to
+	// explicitly choose the class name).
+	JavaOuterClassname *string `protobuf:"bytes,8,opt,name=java_outer_classname,json=javaOuterClassname" json:"java_outer_classname,omitempty"`
+	// If set true, then the Java code generator will generate a separate .java
+	// file for each top-level message, enum, and service defined in the .proto
+	// file.  Thus, these types will *not* be nested inside the outer class
+	// named by java_outer_classname.  However, the outer class will still be
+	// generated to contain the file's getDescriptor() method as well as any
+	// top-level extensions defined in the file.
+	JavaMultipleFiles *bool `protobuf:"varint,10,opt,name=java_multiple_files,json=javaMultipleFiles,def=0" json:"java_multiple_files,omitempty"`
+	// This option does nothing.
+	JavaGenerateEqualsAndHash *bool `protobuf:"varint,20,opt,name=java_generate_equals_and_hash,json=javaGenerateEqualsAndHash" json:"java_generate_equals_and_hash,omitempty"`
+	// If set true, then the Java2 code generator will generate code that
+	// throws an exception whenever an attempt is made to assign a non-UTF-8
+	// byte sequence to a string field.
+	// Message reflection will do the same.
+	// However, an extension field still accepts non-UTF-8 byte sequences.
+	// This option has no effect on when used with the lite runtime.
+	JavaStringCheckUtf8 *bool                     `protobuf:"varint,27,opt,name=java_string_check_utf8,json=javaStringCheckUtf8,def=0" json:"java_string_check_utf8,omitempty"`
+	OptimizeFor         *FileOptions_OptimizeMode `protobuf:"varint,9,opt,name=optimize_for,json=optimizeFor,enum=google.protobuf.FileOptions_OptimizeMode,def=1" json:"optimize_for,omitempty"`
+	// Sets the Go package where structs generated from this .proto will be
+	// placed. If omitted, the Go package will be derived from the following:
+	//   - The basename of the package import path, if provided.
+	//   - Otherwise, the package statement in the .proto file, if present.
+	//   - Otherwise, the basename of the .proto file, without extension.
+	GoPackage *string `protobuf:"bytes,11,opt,name=go_package,json=goPackage" json:"go_package,omitempty"`
+	// Should generic services be generated in each language?  "Generic" services
+	// are not specific to any particular RPC system.  They are generated by the
+	// main code generators in each language (without additional plugins).
+	// Generic services were the only kind of service generation supported by
+	// early versions of google.protobuf.
+	//
+	// Generic services are now considered deprecated in favor of using plugins
+	// that generate code specific to your particular RPC system.  Therefore,
+	// these default to false.  Old code which depends on generic services should
+	// explicitly set them to true.
+	CcGenericServices   *bool `protobuf:"varint,16,opt,name=cc_generic_services,json=ccGenericServices,def=0" json:"cc_generic_services,omitempty"`
+	JavaGenericServices *bool `protobuf:"varint,17,opt,name=java_generic_services,json=javaGenericServices,def=0" json:"java_generic_services,omitempty"`
+	PyGenericServices   *bool `protobuf:"varint,18,opt,name=py_generic_services,json=pyGenericServices,def=0" json:"py_generic_services,omitempty"`
+	// Is this file deprecated?
+	// Depending on the target platform, this can emit Deprecated annotations
+	// for everything in the file, or it will be completely ignored; in the very
+	// least, this is a formalization for deprecating files.
+	Deprecated *bool `protobuf:"varint,23,opt,name=deprecated,def=0" json:"deprecated,omitempty"`
+	// Enables the use of arenas for the proto messages in this file. This applies
+	// only to generated classes for C++.
+	CcEnableArenas *bool `protobuf:"varint,31,opt,name=cc_enable_arenas,json=ccEnableArenas,def=0" json:"cc_enable_arenas,omitempty"`
+	// Sets the objective c class prefix which is prepended to all objective c
+	// generated classes from this .proto. There is no default.
+	ObjcClassPrefix *string `protobuf:"bytes,36,opt,name=objc_class_prefix,json=objcClassPrefix" json:"objc_class_prefix,omitempty"`
+	// Namespace for generated classes; defaults to the package.
+	CsharpNamespace *string `protobuf:"bytes,37,opt,name=csharp_namespace,json=csharpNamespace" json:"csharp_namespace,omitempty"`
+	// By default Swift generators will take the proto package and CamelCase it
+	// replacing '.' with underscore and use that to prefix the types/symbols
+	// defined. When this options is provided, they will use this value instead
+	// to prefix the types/symbols defined.
+	SwiftPrefix *string `protobuf:"bytes,39,opt,name=swift_prefix,json=swiftPrefix" json:"swift_prefix,omitempty"`
+	// Sets the php class prefix which is prepended to all php generated classes
+	// from this .proto. Default is empty.
+	PhpClassPrefix *string `protobuf:"bytes,40,opt,name=php_class_prefix,json=phpClassPrefix" json:"php_class_prefix,omitempty"`
+	// The parser stores options it doesn't recognize here. See above.
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+}
+
+func (m *FileOptions) Reset()                    { *m = FileOptions{} }
+func (m *FileOptions) String() string            { return proto.CompactTextString(m) }
+func (*FileOptions) ProtoMessage()               {}
+func (*FileOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{9} }
+
+var extRange_FileOptions = []proto.ExtensionRange{
+	{1000, 536870911},
+}
+
+func (*FileOptions) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_FileOptions
+}
+
+const Default_FileOptions_JavaMultipleFiles bool = false
+const Default_FileOptions_JavaStringCheckUtf8 bool = false
+const Default_FileOptions_OptimizeFor FileOptions_OptimizeMode = FileOptions_SPEED
+const Default_FileOptions_CcGenericServices bool = false
+const Default_FileOptions_JavaGenericServices bool = false
+const Default_FileOptions_PyGenericServices bool = false
+const Default_FileOptions_Deprecated bool = false
+const Default_FileOptions_CcEnableArenas bool = false
+
+func (m *FileOptions) GetJavaPackage() string {
+	if m != nil && m.JavaPackage != nil {
+		return *m.JavaPackage
+	}
+	return ""
+}
+
+func (m *FileOptions) GetJavaOuterClassname() string {
+	if m != nil && m.JavaOuterClassname != nil {
+		return *m.JavaOuterClassname
+	}
+	return ""
+}
+
+func (m *FileOptions) GetJavaMultipleFiles() bool {
+	if m != nil && m.JavaMultipleFiles != nil {
+		return *m.JavaMultipleFiles
+	}
+	return Default_FileOptions_JavaMultipleFiles
+}
+
+func (m *FileOptions) GetJavaGenerateEqualsAndHash() bool {
+	if m != nil && m.JavaGenerateEqualsAndHash != nil {
+		return *m.JavaGenerateEqualsAndHash
+	}
+	return false
+}
+
+func (m *FileOptions) GetJavaStringCheckUtf8() bool {
+	if m != nil && m.JavaStringCheckUtf8 != nil {
+		return *m.JavaStringCheckUtf8
+	}
+	return Default_FileOptions_JavaStringCheckUtf8
+}
+
+func (m *FileOptions) GetOptimizeFor() FileOptions_OptimizeMode {
+	if m != nil && m.OptimizeFor != nil {
+		return *m.OptimizeFor
+	}
+	return Default_FileOptions_OptimizeFor
+}
+
+func (m *FileOptions) GetGoPackage() string {
+	if m != nil && m.GoPackage != nil {
+		return *m.GoPackage
+	}
+	return ""
+}
+
+func (m *FileOptions) GetCcGenericServices() bool {
+	if m != nil && m.CcGenericServices != nil {
+		return *m.CcGenericServices
+	}
+	return Default_FileOptions_CcGenericServices
+}
+
+func (m *FileOptions) GetJavaGenericServices() bool {
+	if m != nil && m.JavaGenericServices != nil {
+		return *m.JavaGenericServices
+	}
+	return Default_FileOptions_JavaGenericServices
+}
+
+func (m *FileOptions) GetPyGenericServices() bool {
+	if m != nil && m.PyGenericServices != nil {
+		return *m.PyGenericServices
+	}
+	return Default_FileOptions_PyGenericServices
+}
+
+func (m *FileOptions) GetDeprecated() bool {
+	if m != nil && m.Deprecated != nil {
+		return *m.Deprecated
+	}
+	return Default_FileOptions_Deprecated
+}
+
+func (m *FileOptions) GetCcEnableArenas() bool {
+	if m != nil && m.CcEnableArenas != nil {
+		return *m.CcEnableArenas
+	}
+	return Default_FileOptions_CcEnableArenas
+}
+
+func (m *FileOptions) GetObjcClassPrefix() string {
+	if m != nil && m.ObjcClassPrefix != nil {
+		return *m.ObjcClassPrefix
+	}
+	return ""
+}
+
+func (m *FileOptions) GetCsharpNamespace() string {
+	if m != nil && m.CsharpNamespace != nil {
+		return *m.CsharpNamespace
+	}
+	return ""
+}
+
+func (m *FileOptions) GetSwiftPrefix() string {
+	if m != nil && m.SwiftPrefix != nil {
+		return *m.SwiftPrefix
+	}
+	return ""
+}
+
+func (m *FileOptions) GetPhpClassPrefix() string {
+	if m != nil && m.PhpClassPrefix != nil {
+		return *m.PhpClassPrefix
+	}
+	return ""
+}
+
+func (m *FileOptions) GetUninterpretedOption() []*UninterpretedOption {
+	if m != nil {
+		return m.UninterpretedOption
+	}
+	return nil
+}
+
+type MessageOptions struct {
+	// Set true to use the old proto1 MessageSet wire format for extensions.
+	// This is provided for backwards-compatibility with the MessageSet wire
+	// format.  You should not use this for any other reason:  It's less
+	// efficient, has fewer features, and is more complicated.
+	//
+	// The message must be defined exactly as follows:
+	//   message Foo {
+	//     option message_set_wire_format = true;
+	//     extensions 4 to max;
+	//   }
+	// Note that the message cannot have any defined fields; MessageSets only
+	// have extensions.
+	//
+	// All extensions of your type must be singular messages; e.g. they cannot
+	// be int32s, enums, or repeated messages.
+	//
+	// Because this is an option, the above two restrictions are not enforced by
+	// the protocol compiler.
+	MessageSetWireFormat *bool `protobuf:"varint,1,opt,name=message_set_wire_format,json=messageSetWireFormat,def=0" json:"message_set_wire_format,omitempty"`
+	// Disables the generation of the standard "descriptor()" accessor, which can
+	// conflict with a field of the same name.  This is meant to make migration
+	// from proto1 easier; new code should avoid fields named "descriptor".
+	NoStandardDescriptorAccessor *bool `protobuf:"varint,2,opt,name=no_standard_descriptor_accessor,json=noStandardDescriptorAccessor,def=0" json:"no_standard_descriptor_accessor,omitempty"`
+	// Is this message deprecated?
+	// Depending on the target platform, this can emit Deprecated annotations
+	// for the message, or it will be completely ignored; in the very least,
+	// this is a formalization for deprecating messages.
+	Deprecated *bool `protobuf:"varint,3,opt,name=deprecated,def=0" json:"deprecated,omitempty"`
+	// Whether the message is an automatically generated map entry type for the
+	// maps field.
+	//
+	// For maps fields:
+	//     map<KeyType, ValueType> map_field = 1;
+	// The parsed descriptor looks like:
+	//     message MapFieldEntry {
+	//         option map_entry = true;
+	//         optional KeyType key = 1;
+	//         optional ValueType value = 2;
+	//     }
+	//     repeated MapFieldEntry map_field = 1;
+	//
+	// Implementations may choose not to generate the map_entry=true message, but
+	// use a native map in the target language to hold the keys and values.
+	// The reflection APIs in such implementions still need to work as
+	// if the field is a repeated message field.
+	//
+	// NOTE: Do not set the option in .proto files. Always use the maps syntax
+	// instead. The option should only be implicitly set by the proto compiler
+	// parser.
+	MapEntry *bool `protobuf:"varint,7,opt,name=map_entry,json=mapEntry" json:"map_entry,omitempty"`
+	// The parser stores options it doesn't recognize here. See above.
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+}
+
+func (m *MessageOptions) Reset()                    { *m = MessageOptions{} }
+func (m *MessageOptions) String() string            { return proto.CompactTextString(m) }
+func (*MessageOptions) ProtoMessage()               {}
+func (*MessageOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{10} }
+
+var extRange_MessageOptions = []proto.ExtensionRange{
+	{1000, 536870911},
+}
+
+func (*MessageOptions) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_MessageOptions
+}
+
+const Default_MessageOptions_MessageSetWireFormat bool = false
+const Default_MessageOptions_NoStandardDescriptorAccessor bool = false
+const Default_MessageOptions_Deprecated bool = false
+
+func (m *MessageOptions) GetMessageSetWireFormat() bool {
+	if m != nil && m.MessageSetWireFormat != nil {
+		return *m.MessageSetWireFormat
+	}
+	return Default_MessageOptions_MessageSetWireFormat
+}
+
+func (m *MessageOptions) GetNoStandardDescriptorAccessor() bool {
+	if m != nil && m.NoStandardDescriptorAccessor != nil {
+		return *m.NoStandardDescriptorAccessor
+	}
+	return Default_MessageOptions_NoStandardDescriptorAccessor
+}
+
+func (m *MessageOptions) GetDeprecated() bool {
+	if m != nil && m.Deprecated != nil {
+		return *m.Deprecated
+	}
+	return Default_MessageOptions_Deprecated
+}
+
+func (m *MessageOptions) GetMapEntry() bool {
+	if m != nil && m.MapEntry != nil {
+		return *m.MapEntry
+	}
+	return false
+}
+
+func (m *MessageOptions) GetUninterpretedOption() []*UninterpretedOption {
+	if m != nil {
+		return m.UninterpretedOption
+	}
+	return nil
+}
+
+type FieldOptions struct {
+	// The ctype option instructs the C++ code generator to use a different
+	// representation of the field than it normally would.  See the specific
+	// options below.  This option is not yet implemented in the open source
+	// release -- sorry, we'll try to include it in a future version!
+	Ctype *FieldOptions_CType `protobuf:"varint,1,opt,name=ctype,enum=google.protobuf.FieldOptions_CType,def=0" json:"ctype,omitempty"`
+	// The packed option can be enabled for repeated primitive fields to enable
+	// a more efficient representation on the wire. Rather than repeatedly
+	// writing the tag and type for each element, the entire array is encoded as
+	// a single length-delimited blob. In proto3, only explicit setting it to
+	// false will avoid using packed encoding.
+	Packed *bool `protobuf:"varint,2,opt,name=packed" json:"packed,omitempty"`
+	// The jstype option determines the JavaScript type used for values of the
+	// field.  The option is permitted only for 64 bit integral and fixed types
+	// (int64, uint64, sint64, fixed64, sfixed64).  By default these types are
+	// represented as JavaScript strings.  This avoids loss of precision that can
+	// happen when a large value is converted to a floating point JavaScript
+	// numbers.  Specifying JS_NUMBER for the jstype causes the generated
+	// JavaScript code to use the JavaScript "number" type instead of strings.
+	// This option is an enum to permit additional types to be added,
+	// e.g. goog.math.Integer.
+	Jstype *FieldOptions_JSType `protobuf:"varint,6,opt,name=jstype,enum=google.protobuf.FieldOptions_JSType,def=0" json:"jstype,omitempty"`
+	// Should this field be parsed lazily?  Lazy applies only to message-type
+	// fields.  It means that when the outer message is initially parsed, the
+	// inner message's contents will not be parsed but instead stored in encoded
+	// form.  The inner message will actually be parsed when it is first accessed.
+	//
+	// This is only a hint.  Implementations are free to choose whether to use
+	// eager or lazy parsing regardless of the value of this option.  However,
+	// setting this option true suggests that the protocol author believes that
+	// using lazy parsing on this field is worth the additional bookkeeping
+	// overhead typically needed to implement it.
+	//
+	// This option does not affect the public interface of any generated code;
+	// all method signatures remain the same.  Furthermore, thread-safety of the
+	// interface is not affected by this option; const methods remain safe to
+	// call from multiple threads concurrently, while non-const methods continue
+	// to require exclusive access.
+	//
+	//
+	// Note that implementations may choose not to check required fields within
+	// a lazy sub-message.  That is, calling IsInitialized() on the outer message
+	// may return true even if the inner message has missing required fields.
+	// This is necessary because otherwise the inner message would have to be
+	// parsed in order to perform the check, defeating the purpose of lazy
+	// parsing.  An implementation which chooses not to check required fields
+	// must be consistent about it.  That is, for any particular sub-message, the
+	// implementation must either *always* check its required fields, or *never*
+	// check its required fields, regardless of whether or not the message has
+	// been parsed.
+	Lazy *bool `protobuf:"varint,5,opt,name=lazy,def=0" json:"lazy,omitempty"`
+	// Is this field deprecated?
+	// Depending on the target platform, this can emit Deprecated annotations
+	// for accessors, or it will be completely ignored; in the very least, this
+	// is a formalization for deprecating fields.
+	Deprecated *bool `protobuf:"varint,3,opt,name=deprecated,def=0" json:"deprecated,omitempty"`
+	// For Google-internal migration only. Do not use.
+	Weak *bool `protobuf:"varint,10,opt,name=weak,def=0" json:"weak,omitempty"`
+	// The parser stores options it doesn't recognize here. See above.
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+}
+
+func (m *FieldOptions) Reset()                    { *m = FieldOptions{} }
+func (m *FieldOptions) String() string            { return proto.CompactTextString(m) }
+func (*FieldOptions) ProtoMessage()               {}
+func (*FieldOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{11} }
+
+var extRange_FieldOptions = []proto.ExtensionRange{
+	{1000, 536870911},
+}
+
+func (*FieldOptions) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_FieldOptions
+}
+
+const Default_FieldOptions_Ctype FieldOptions_CType = FieldOptions_STRING
+const Default_FieldOptions_Jstype FieldOptions_JSType = FieldOptions_JS_NORMAL
+const Default_FieldOptions_Lazy bool = false
+const Default_FieldOptions_Deprecated bool = false
+const Default_FieldOptions_Weak bool = false
+
+func (m *FieldOptions) GetCtype() FieldOptions_CType {
+	if m != nil && m.Ctype != nil {
+		return *m.Ctype
+	}
+	return Default_FieldOptions_Ctype
+}
+
+func (m *FieldOptions) GetPacked() bool {
+	if m != nil && m.Packed != nil {
+		return *m.Packed
+	}
+	return false
+}
+
+func (m *FieldOptions) GetJstype() FieldOptions_JSType {
+	if m != nil && m.Jstype != nil {
+		return *m.Jstype
+	}
+	return Default_FieldOptions_Jstype
+}
+
+func (m *FieldOptions) GetLazy() bool {
+	if m != nil && m.Lazy != nil {
+		return *m.Lazy
+	}
+	return Default_FieldOptions_Lazy
+}
+
+func (m *FieldOptions) GetDeprecated() bool {
+	if m != nil && m.Deprecated != nil {
+		return *m.Deprecated
+	}
+	return Default_FieldOptions_Deprecated
+}
+
+func (m *FieldOptions) GetWeak() bool {
+	if m != nil && m.Weak != nil {
+		return *m.Weak
+	}
+	return Default_FieldOptions_Weak
+}
+
+func (m *FieldOptions) GetUninterpretedOption() []*UninterpretedOption {
+	if m != nil {
+		return m.UninterpretedOption
+	}
+	return nil
+}
+
+type OneofOptions struct {
+	// The parser stores options it doesn't recognize here. See above.
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+}
+
+func (m *OneofOptions) Reset()                    { *m = OneofOptions{} }
+func (m *OneofOptions) String() string            { return proto.CompactTextString(m) }
+func (*OneofOptions) ProtoMessage()               {}
+func (*OneofOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{12} }
+
+var extRange_OneofOptions = []proto.ExtensionRange{
+	{1000, 536870911},
+}
+
+func (*OneofOptions) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_OneofOptions
+}
+
+func (m *OneofOptions) GetUninterpretedOption() []*UninterpretedOption {
+	if m != nil {
+		return m.UninterpretedOption
+	}
+	return nil
+}
+
+type EnumOptions struct {
+	// Set this option to true to allow mapping different tag names to the same
+	// value.
+	AllowAlias *bool `protobuf:"varint,2,opt,name=allow_alias,json=allowAlias" json:"allow_alias,omitempty"`
+	// Is this enum deprecated?
+	// Depending on the target platform, this can emit Deprecated annotations
+	// for the enum, or it will be completely ignored; in the very least, this
+	// is a formalization for deprecating enums.
+	Deprecated *bool `protobuf:"varint,3,opt,name=deprecated,def=0" json:"deprecated,omitempty"`
+	// The parser stores options it doesn't recognize here. See above.
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+}
+
+func (m *EnumOptions) Reset()                    { *m = EnumOptions{} }
+func (m *EnumOptions) String() string            { return proto.CompactTextString(m) }
+func (*EnumOptions) ProtoMessage()               {}
+func (*EnumOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{13} }
+
+var extRange_EnumOptions = []proto.ExtensionRange{
+	{1000, 536870911},
+}
+
+func (*EnumOptions) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_EnumOptions
+}
+
+const Default_EnumOptions_Deprecated bool = false
+
+func (m *EnumOptions) GetAllowAlias() bool {
+	if m != nil && m.AllowAlias != nil {
+		return *m.AllowAlias
+	}
+	return false
+}
+
+func (m *EnumOptions) GetDeprecated() bool {
+	if m != nil && m.Deprecated != nil {
+		return *m.Deprecated
+	}
+	return Default_EnumOptions_Deprecated
+}
+
+func (m *EnumOptions) GetUninterpretedOption() []*UninterpretedOption {
+	if m != nil {
+		return m.UninterpretedOption
+	}
+	return nil
+}
+
+type EnumValueOptions struct {
+	// Is this enum value deprecated?
+	// Depending on the target platform, this can emit Deprecated annotations
+	// for the enum value, or it will be completely ignored; in the very least,
+	// this is a formalization for deprecating enum values.
+	Deprecated *bool `protobuf:"varint,1,opt,name=deprecated,def=0" json:"deprecated,omitempty"`
+	// The parser stores options it doesn't recognize here. See above.
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+}
+
+func (m *EnumValueOptions) Reset()                    { *m = EnumValueOptions{} }
+func (m *EnumValueOptions) String() string            { return proto.CompactTextString(m) }
+func (*EnumValueOptions) ProtoMessage()               {}
+func (*EnumValueOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{14} }
+
+var extRange_EnumValueOptions = []proto.ExtensionRange{
+	{1000, 536870911},
+}
+
+func (*EnumValueOptions) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_EnumValueOptions
+}
+
+const Default_EnumValueOptions_Deprecated bool = false
+
+func (m *EnumValueOptions) GetDeprecated() bool {
+	if m != nil && m.Deprecated != nil {
+		return *m.Deprecated
+	}
+	return Default_EnumValueOptions_Deprecated
+}
+
+func (m *EnumValueOptions) GetUninterpretedOption() []*UninterpretedOption {
+	if m != nil {
+		return m.UninterpretedOption
+	}
+	return nil
+}
+
+type ServiceOptions struct {
+	// Is this service deprecated?
+	// Depending on the target platform, this can emit Deprecated annotations
+	// for the service, or it will be completely ignored; in the very least,
+	// this is a formalization for deprecating services.
+	Deprecated *bool `protobuf:"varint,33,opt,name=deprecated,def=0" json:"deprecated,omitempty"`
+	// The parser stores options it doesn't recognize here. See above.
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+}
+
+func (m *ServiceOptions) Reset()                    { *m = ServiceOptions{} }
+func (m *ServiceOptions) String() string            { return proto.CompactTextString(m) }
+func (*ServiceOptions) ProtoMessage()               {}
+func (*ServiceOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{15} }
+
+var extRange_ServiceOptions = []proto.ExtensionRange{
+	{1000, 536870911},
+}
+
+func (*ServiceOptions) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_ServiceOptions
+}
+
+const Default_ServiceOptions_Deprecated bool = false
+
+func (m *ServiceOptions) GetDeprecated() bool {
+	if m != nil && m.Deprecated != nil {
+		return *m.Deprecated
+	}
+	return Default_ServiceOptions_Deprecated
+}
+
+func (m *ServiceOptions) GetUninterpretedOption() []*UninterpretedOption {
+	if m != nil {
+		return m.UninterpretedOption
+	}
+	return nil
+}
+
+type MethodOptions struct {
+	// Is this method deprecated?
+	// Depending on the target platform, this can emit Deprecated annotations
+	// for the method, or it will be completely ignored; in the very least,
+	// this is a formalization for deprecating methods.
+	Deprecated       *bool                           `protobuf:"varint,33,opt,name=deprecated,def=0" json:"deprecated,omitempty"`
+	IdempotencyLevel *MethodOptions_IdempotencyLevel `protobuf:"varint,34,opt,name=idempotency_level,json=idempotencyLevel,enum=google.protobuf.MethodOptions_IdempotencyLevel,def=0" json:"idempotency_level,omitempty"`
+	// The parser stores options it doesn't recognize here. See above.
+	UninterpretedOption          []*UninterpretedOption `protobuf:"bytes,999,rep,name=uninterpreted_option,json=uninterpretedOption" json:"uninterpreted_option,omitempty"`
+	proto.XXX_InternalExtensions `json:"-"`
+	XXX_unrecognized             []byte `json:"-"`
+}
+
+func (m *MethodOptions) Reset()                    { *m = MethodOptions{} }
+func (m *MethodOptions) String() string            { return proto.CompactTextString(m) }
+func (*MethodOptions) ProtoMessage()               {}
+func (*MethodOptions) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{16} }
+
+var extRange_MethodOptions = []proto.ExtensionRange{
+	{1000, 536870911},
+}
+
+func (*MethodOptions) ExtensionRangeArray() []proto.ExtensionRange {
+	return extRange_MethodOptions
+}
+
+const Default_MethodOptions_Deprecated bool = false
+const Default_MethodOptions_IdempotencyLevel MethodOptions_IdempotencyLevel = MethodOptions_IDEMPOTENCY_UNKNOWN
+
+func (m *MethodOptions) GetDeprecated() bool {
+	if m != nil && m.Deprecated != nil {
+		return *m.Deprecated
+	}
+	return Default_MethodOptions_Deprecated
+}
+
+func (m *MethodOptions) GetIdempotencyLevel() MethodOptions_IdempotencyLevel {
+	if m != nil && m.IdempotencyLevel != nil {
+		return *m.IdempotencyLevel
+	}
+	return Default_MethodOptions_IdempotencyLevel
+}
+
+func (m *MethodOptions) GetUninterpretedOption() []*UninterpretedOption {
+	if m != nil {
+		return m.UninterpretedOption
+	}
+	return nil
+}
+
+// A message representing a option the parser does not recognize. This only
+// appears in options protos created by the compiler::Parser class.
+// DescriptorPool resolves these when building Descriptor objects. Therefore,
+// options protos in descriptor objects (e.g. returned by Descriptor::options(),
+// or produced by Descriptor::CopyTo()) will never have UninterpretedOptions
+// in them.
+type UninterpretedOption struct {
+	Name []*UninterpretedOption_NamePart `protobuf:"bytes,2,rep,name=name" json:"name,omitempty"`
+	// The value of the uninterpreted option, in whatever type the tokenizer
+	// identified it as during parsing. Exactly one of these should be set.
+	IdentifierValue  *string  `protobuf:"bytes,3,opt,name=identifier_value,json=identifierValue" json:"identifier_value,omitempty"`
+	PositiveIntValue *uint64  `protobuf:"varint,4,opt,name=positive_int_value,json=positiveIntValue" json:"positive_int_value,omitempty"`
+	NegativeIntValue *int64   `protobuf:"varint,5,opt,name=negative_int_value,json=negativeIntValue" json:"negative_int_value,omitempty"`
+	DoubleValue      *float64 `protobuf:"fixed64,6,opt,name=double_value,json=doubleValue" json:"double_value,omitempty"`
+	StringValue      []byte   `protobuf:"bytes,7,opt,name=string_value,json=stringValue" json:"string_value,omitempty"`
+	AggregateValue   *string  `protobuf:"bytes,8,opt,name=aggregate_value,json=aggregateValue" json:"aggregate_value,omitempty"`
+	XXX_unrecognized []byte   `json:"-"`
+}
+
+func (m *UninterpretedOption) Reset()                    { *m = UninterpretedOption{} }
+func (m *UninterpretedOption) String() string            { return proto.CompactTextString(m) }
+func (*UninterpretedOption) ProtoMessage()               {}
+func (*UninterpretedOption) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{17} }
+
+func (m *UninterpretedOption) GetName() []*UninterpretedOption_NamePart {
+	if m != nil {
+		return m.Name
+	}
+	return nil
+}
+
+func (m *UninterpretedOption) GetIdentifierValue() string {
+	if m != nil && m.IdentifierValue != nil {
+		return *m.IdentifierValue
+	}
+	return ""
+}
+
+func (m *UninterpretedOption) GetPositiveIntValue() uint64 {
+	if m != nil && m.PositiveIntValue != nil {
+		return *m.PositiveIntValue
+	}
+	return 0
+}
+
+func (m *UninterpretedOption) GetNegativeIntValue() int64 {
+	if m != nil && m.NegativeIntValue != nil {
+		return *m.NegativeIntValue
+	}
+	return 0
+}
+
+func (m *UninterpretedOption) GetDoubleValue() float64 {
+	if m != nil && m.DoubleValue != nil {
+		return *m.DoubleValue
+	}
+	return 0
+}
+
+func (m *UninterpretedOption) GetStringValue() []byte {
+	if m != nil {
+		return m.StringValue
+	}
+	return nil
+}
+
+func (m *UninterpretedOption) GetAggregateValue() string {
+	if m != nil && m.AggregateValue != nil {
+		return *m.AggregateValue
+	}
+	return ""
+}
+
+// The name of the uninterpreted option.  Each string represents a segment in
+// a dot-separated name.  is_extension is true iff a segment represents an
+// extension (denoted with parentheses in options specs in .proto files).
+// E.g.,{ ["foo", false], ["bar.baz", true], ["qux", false] } represents
+// "foo.(bar.baz).qux".
+type UninterpretedOption_NamePart struct {
+	NamePart         *string `protobuf:"bytes,1,req,name=name_part,json=namePart" json:"name_part,omitempty"`
+	IsExtension      *bool   `protobuf:"varint,2,req,name=is_extension,json=isExtension" json:"is_extension,omitempty"`
+	XXX_unrecognized []byte  `json:"-"`
+}
+
+func (m *UninterpretedOption_NamePart) Reset()         { *m = UninterpretedOption_NamePart{} }
+func (m *UninterpretedOption_NamePart) String() string { return proto.CompactTextString(m) }
+func (*UninterpretedOption_NamePart) ProtoMessage()    {}
+func (*UninterpretedOption_NamePart) Descriptor() ([]byte, []int) {
+	return fileDescriptor0, []int{17, 0}
+}
+
+func (m *UninterpretedOption_NamePart) GetNamePart() string {
+	if m != nil && m.NamePart != nil {
+		return *m.NamePart
+	}
+	return ""
+}
+
+func (m *UninterpretedOption_NamePart) GetIsExtension() bool {
+	if m != nil && m.IsExtension != nil {
+		return *m.IsExtension
+	}
+	return false
+}
+
+// Encapsulates information about the original source file from which a
+// FileDescriptorProto was generated.
+type SourceCodeInfo struct {
+	// A Location identifies a piece of source code in a .proto file which
+	// corresponds to a particular definition.  This information is intended
+	// to be useful to IDEs, code indexers, documentation generators, and similar
+	// tools.
+	//
+	// For example, say we have a file like:
+	//   message Foo {
+	//     optional string foo = 1;
+	//   }
+	// Let's look at just the field definition:
+	//   optional string foo = 1;
+	//   ^       ^^     ^^  ^  ^^^
+	//   a       bc     de  f  ghi
+	// We have the following locations:
+	//   span   path               represents
+	//   [a,i)  [ 4, 0, 2, 0 ]     The whole field definition.
+	//   [a,b)  [ 4, 0, 2, 0, 4 ]  The label (optional).
+	//   [c,d)  [ 4, 0, 2, 0, 5 ]  The type (string).
+	//   [e,f)  [ 4, 0, 2, 0, 1 ]  The name (foo).
+	//   [g,h)  [ 4, 0, 2, 0, 3 ]  The number (1).
+	//
+	// Notes:
+	// - A location may refer to a repeated field itself (i.e. not to any
+	//   particular index within it).  This is used whenever a set of elements are
+	//   logically enclosed in a single code segment.  For example, an entire
+	//   extend block (possibly containing multiple extension definitions) will
+	//   have an outer location whose path refers to the "extensions" repeated
+	//   field without an index.
+	// - Multiple locations may have the same path.  This happens when a single
+	//   logical declaration is spread out across multiple places.  The most
+	//   obvious example is the "extend" block again -- there may be multiple
+	//   extend blocks in the same scope, each of which will have the same path.
+	// - A location's span is not always a subset of its parent's span.  For
+	//   example, the "extendee" of an extension declaration appears at the
+	//   beginning of the "extend" block and is shared by all extensions within
+	//   the block.
+	// - Just because a location's span is a subset of some other location's span
+	//   does not mean that it is a descendent.  For example, a "group" defines
+	//   both a type and a field in a single declaration.  Thus, the locations
+	//   corresponding to the type and field and their components will overlap.
+	// - Code which tries to interpret locations should probably be designed to
+	//   ignore those that it doesn't understand, as more types of locations could
+	//   be recorded in the future.
+	Location         []*SourceCodeInfo_Location `protobuf:"bytes,1,rep,name=location" json:"location,omitempty"`
+	XXX_unrecognized []byte                     `json:"-"`
+}
+
+func (m *SourceCodeInfo) Reset()                    { *m = SourceCodeInfo{} }
+func (m *SourceCodeInfo) String() string            { return proto.CompactTextString(m) }
+func (*SourceCodeInfo) ProtoMessage()               {}
+func (*SourceCodeInfo) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{18} }
+
+func (m *SourceCodeInfo) GetLocation() []*SourceCodeInfo_Location {
+	if m != nil {
+		return m.Location
+	}
+	return nil
+}
+
+type SourceCodeInfo_Location struct {
+	// Identifies which part of the FileDescriptorProto was defined at this
+	// location.
+	//
+	// Each element is a field number or an index.  They form a path from
+	// the root FileDescriptorProto to the place where the definition.  For
+	// example, this path:
+	//   [ 4, 3, 2, 7, 1 ]
+	// refers to:
+	//   file.message_type(3)  // 4, 3
+	//       .field(7)         // 2, 7
+	//       .name()           // 1
+	// This is because FileDescriptorProto.message_type has field number 4:
+	//   repeated DescriptorProto message_type = 4;
+	// and DescriptorProto.field has field number 2:
+	//   repeated FieldDescriptorProto field = 2;
+	// and FieldDescriptorProto.name has field number 1:
+	//   optional string name = 1;
+	//
+	// Thus, the above path gives the location of a field name.  If we removed
+	// the last element:
+	//   [ 4, 3, 2, 7 ]
+	// this path refers to the whole field declaration (from the beginning
+	// of the label to the terminating semicolon).
+	Path []int32 `protobuf:"varint,1,rep,packed,name=path" json:"path,omitempty"`
+	// Always has exactly three or four elements: start line, start column,
+	// end line (optional, otherwise assumed same as start line), end column.
+	// These are packed into a single field for efficiency.  Note that line
+	// and column numbers are zero-based -- typically you will want to add
+	// 1 to each before displaying to a user.
+	Span []int32 `protobuf:"varint,2,rep,packed,name=span" json:"span,omitempty"`
+	// If this SourceCodeInfo represents a complete declaration, these are any
+	// comments appearing before and after the declaration which appear to be
+	// attached to the declaration.
+	//
+	// A series of line comments appearing on consecutive lines, with no other
+	// tokens appearing on those lines, will be treated as a single comment.
+	//
+	// leading_detached_comments will keep paragraphs of comments that appear
+	// before (but not connected to) the current element. Each paragraph,
+	// separated by empty lines, will be one comment element in the repeated
+	// field.
+	//
+	// Only the comment content is provided; comment markers (e.g. //) are
+	// stripped out.  For block comments, leading whitespace and an asterisk
+	// will be stripped from the beginning of each line other than the first.
+	// Newlines are included in the output.
+	//
+	// Examples:
+	//
+	//   optional int32 foo = 1;  // Comment attached to foo.
+	//   // Comment attached to bar.
+	//   optional int32 bar = 2;
+	//
+	//   optional string baz = 3;
+	//   // Comment attached to baz.
+	//   // Another line attached to baz.
+	//
+	//   // Comment attached to qux.
+	//   //
+	//   // Another line attached to qux.
+	//   optional double qux = 4;
+	//
+	//   // Detached comment for corge. This is not leading or trailing comments
+	//   // to qux or corge because there are blank lines separating it from
+	//   // both.
+	//
+	//   // Detached comment for corge paragraph 2.
+	//
+	//   optional string corge = 5;
+	//   /* Block comment attached
+	//    * to corge.  Leading asterisks
+	//    * will be removed. */
+	//   /* Block comment attached to
+	//    * grault. */
+	//   optional int32 grault = 6;
+	//
+	//   // ignored detached comments.
+	LeadingComments         *string  `protobuf:"bytes,3,opt,name=leading_comments,json=leadingComments" json:"leading_comments,omitempty"`
+	TrailingComments        *string  `protobuf:"bytes,4,opt,name=trailing_comments,json=trailingComments" json:"trailing_comments,omitempty"`
+	LeadingDetachedComments []string `protobuf:"bytes,6,rep,name=leading_detached_comments,json=leadingDetachedComments" json:"leading_detached_comments,omitempty"`
+	XXX_unrecognized        []byte   `json:"-"`
+}
+
+func (m *SourceCodeInfo_Location) Reset()                    { *m = SourceCodeInfo_Location{} }
+func (m *SourceCodeInfo_Location) String() string            { return proto.CompactTextString(m) }
+func (*SourceCodeInfo_Location) ProtoMessage()               {}
+func (*SourceCodeInfo_Location) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{18, 0} }
+
+func (m *SourceCodeInfo_Location) GetPath() []int32 {
+	if m != nil {
+		return m.Path
+	}
+	return nil
+}
+
+func (m *SourceCodeInfo_Location) GetSpan() []int32 {
+	if m != nil {
+		return m.Span
+	}
+	return nil
+}
+
+func (m *SourceCodeInfo_Location) GetLeadingComments() string {
+	if m != nil && m.LeadingComments != nil {
+		return *m.LeadingComments
+	}
+	return ""
+}
+
+func (m *SourceCodeInfo_Location) GetTrailingComments() string {
+	if m != nil && m.TrailingComments != nil {
+		return *m.TrailingComments
+	}
+	return ""
+}
+
+func (m *SourceCodeInfo_Location) GetLeadingDetachedComments() []string {
+	if m != nil {
+		return m.LeadingDetachedComments
+	}
+	return nil
+}
+
+// Describes the relationship between generated code and its original source
+// file. A GeneratedCodeInfo message is associated with only one generated
+// source file, but may contain references to different source .proto files.
+type GeneratedCodeInfo struct {
+	// An Annotation connects some span of text in generated code to an element
+	// of its generating .proto file.
+	Annotation       []*GeneratedCodeInfo_Annotation `protobuf:"bytes,1,rep,name=annotation" json:"annotation,omitempty"`
+	XXX_unrecognized []byte                          `json:"-"`
+}
+
+func (m *GeneratedCodeInfo) Reset()                    { *m = GeneratedCodeInfo{} }
+func (m *GeneratedCodeInfo) String() string            { return proto.CompactTextString(m) }
+func (*GeneratedCodeInfo) ProtoMessage()               {}
+func (*GeneratedCodeInfo) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{19} }
+
+func (m *GeneratedCodeInfo) GetAnnotation() []*GeneratedCodeInfo_Annotation {
+	if m != nil {
+		return m.Annotation
+	}
+	return nil
+}
+
+type GeneratedCodeInfo_Annotation struct {
+	// Identifies the element in the original source .proto file. This field
+	// is formatted the same as SourceCodeInfo.Location.path.
+	Path []int32 `protobuf:"varint,1,rep,packed,name=path" json:"path,omitempty"`
+	// Identifies the filesystem path to the original source .proto.
+	SourceFile *string `protobuf:"bytes,2,opt,name=source_file,json=sourceFile" json:"source_file,omitempty"`
+	// Identifies the starting offset in bytes in the generated code
+	// that relates to the identified object.
+	Begin *int32 `protobuf:"varint,3,opt,name=begin" json:"begin,omitempty"`
+	// Identifies the ending offset in bytes in the generated code that
+	// relates to the identified offset. The end offset should be one past
+	// the last relevant byte (so the length of the text = end - begin).
+	End              *int32 `protobuf:"varint,4,opt,name=end" json:"end,omitempty"`
+	XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *GeneratedCodeInfo_Annotation) Reset()         { *m = GeneratedCodeInfo_Annotation{} }
+func (m *GeneratedCodeInfo_Annotation) String() string { return proto.CompactTextString(m) }
+func (*GeneratedCodeInfo_Annotation) ProtoMessage()    {}
+func (*GeneratedCodeInfo_Annotation) Descriptor() ([]byte, []int) {
+	return fileDescriptor0, []int{19, 0}
+}
+
+func (m *GeneratedCodeInfo_Annotation) GetPath() []int32 {
+	if m != nil {
+		return m.Path
+	}
+	return nil
+}
+
+func (m *GeneratedCodeInfo_Annotation) GetSourceFile() string {
+	if m != nil && m.SourceFile != nil {
+		return *m.SourceFile
+	}
+	return ""
+}
+
+func (m *GeneratedCodeInfo_Annotation) GetBegin() int32 {
+	if m != nil && m.Begin != nil {
+		return *m.Begin
+	}
+	return 0
+}
+
+func (m *GeneratedCodeInfo_Annotation) GetEnd() int32 {
+	if m != nil && m.End != nil {
+		return *m.End
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterType((*FileDescriptorSet)(nil), "google.protobuf.FileDescriptorSet")
+	proto.RegisterType((*FileDescriptorProto)(nil), "google.protobuf.FileDescriptorProto")
+	proto.RegisterType((*DescriptorProto)(nil), "google.protobuf.DescriptorProto")
+	proto.RegisterType((*DescriptorProto_ExtensionRange)(nil), "google.protobuf.DescriptorProto.ExtensionRange")
+	proto.RegisterType((*DescriptorProto_ReservedRange)(nil), "google.protobuf.DescriptorProto.ReservedRange")
+	proto.RegisterType((*FieldDescriptorProto)(nil), "google.protobuf.FieldDescriptorProto")
+	proto.RegisterType((*OneofDescriptorProto)(nil), "google.protobuf.OneofDescriptorProto")
+	proto.RegisterType((*EnumDescriptorProto)(nil), "google.protobuf.EnumDescriptorProto")
+	proto.RegisterType((*EnumValueDescriptorProto)(nil), "google.protobuf.EnumValueDescriptorProto")
+	proto.RegisterType((*ServiceDescriptorProto)(nil), "google.protobuf.ServiceDescriptorProto")
+	proto.RegisterType((*MethodDescriptorProto)(nil), "google.protobuf.MethodDescriptorProto")
+	proto.RegisterType((*FileOptions)(nil), "google.protobuf.FileOptions")
+	proto.RegisterType((*MessageOptions)(nil), "google.protobuf.MessageOptions")
+	proto.RegisterType((*FieldOptions)(nil), "google.protobuf.FieldOptions")
+	proto.RegisterType((*OneofOptions)(nil), "google.protobuf.OneofOptions")
+	proto.RegisterType((*EnumOptions)(nil), "google.protobuf.EnumOptions")
+	proto.RegisterType((*EnumValueOptions)(nil), "google.protobuf.EnumValueOptions")
+	proto.RegisterType((*ServiceOptions)(nil), "google.protobuf.ServiceOptions")
+	proto.RegisterType((*MethodOptions)(nil), "google.protobuf.MethodOptions")
+	proto.RegisterType((*UninterpretedOption)(nil), "google.protobuf.UninterpretedOption")
+	proto.RegisterType((*UninterpretedOption_NamePart)(nil), "google.protobuf.UninterpretedOption.NamePart")
+	proto.RegisterType((*SourceCodeInfo)(nil), "google.protobuf.SourceCodeInfo")
+	proto.RegisterType((*SourceCodeInfo_Location)(nil), "google.protobuf.SourceCodeInfo.Location")
+	proto.RegisterType((*GeneratedCodeInfo)(nil), "google.protobuf.GeneratedCodeInfo")
+	proto.RegisterType((*GeneratedCodeInfo_Annotation)(nil), "google.protobuf.GeneratedCodeInfo.Annotation")
+	proto.RegisterEnum("google.protobuf.FieldDescriptorProto_Type", FieldDescriptorProto_Type_name, FieldDescriptorProto_Type_value)
+	proto.RegisterEnum("google.protobuf.FieldDescriptorProto_Label", FieldDescriptorProto_Label_name, FieldDescriptorProto_Label_value)
+	proto.RegisterEnum("google.protobuf.FileOptions_OptimizeMode", FileOptions_OptimizeMode_name, FileOptions_OptimizeMode_value)
+	proto.RegisterEnum("google.protobuf.FieldOptions_CType", FieldOptions_CType_name, FieldOptions_CType_value)
+	proto.RegisterEnum("google.protobuf.FieldOptions_JSType", FieldOptions_JSType_name, FieldOptions_JSType_value)
+	proto.RegisterEnum("google.protobuf.MethodOptions_IdempotencyLevel", MethodOptions_IdempotencyLevel_name, MethodOptions_IdempotencyLevel_value)
+}
+
+func init() { proto.RegisterFile("google/protobuf/descriptor.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
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+	0xa2, 0x9d, 0x52, 0x7d, 0x6a, 0x94, 0xe7, 0x2f, 0x90, 0x17, 0x03, 0x40, 0x33, 0xd0, 0x87, 0xb6,
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+	0x9e, 0xae, 0x79, 0x2a, 0xcf, 0xd9, 0xd5, 0xea, 0x91, 0x91, 0x12, 0x73, 0xb0, 0x35, 0x06, 0x98,
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+	0xc4, 0x6e, 0x46, 0x78, 0x13, 0x72, 0x27, 0x74, 0x64, 0x58, 0xc1, 0xbb, 0xa4, 0x18, 0x84, 0xaf,
+	0x9d, 0xd9, 0xe8, 0xb5, 0xf3, 0xe0, 0x77, 0x29, 0xd8, 0xd0, 0xec, 0xf1, 0x6c, 0xbc, 0x07, 0x68,
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+	0xef, 0x8e, 0x6c, 0x93, 0x58, 0xa3, 0xe9, 0xef, 0x60, 0xfc, 0x1f, 0xed, 0xc6, 0x88, 0x5a, 0x37,
+	0x46, 0x76, 0xec, 0x57, 0xb1, 0x7b, 0xd3, 0x7f, 0xbf, 0x4d, 0x67, 0x0e, 0x7b, 0x07, 0x7f, 0x4e,
+	0x6f, 0x1d, 0x8a, 0x6f, 0xf5, 0xc2, 0xdc, 0x28, 0x74, 0x68, 0x52, 0x8d, 0xcd, 0xf7, 0x7f, 0x01,
+	0x00, 0x00, 0xff, 0xff, 0x8e, 0x54, 0xe7, 0xef, 0x60, 0x1b, 0x00, 0x00,
+}
diff --git a/vendor/vendor.json b/vendor/vendor.json
index b65870c24..8be10b94f 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -105,6 +105,18 @@
 			"revisionTime": "2017-07-10T16:04:46Z"
 		},
 		{
+			"checksumSHA1": "yqF125xVSkmfLpIVGrLlfE05IUk=",
+			"path": "github.com/golang/protobuf/proto",
+			"revision": "748d386b5c1ea99658fd69fe9f03991ce86a90c1",
+			"revisionTime": "2017-07-26T21:28:29Z"
+		},
+		{
+			"checksumSHA1": "Z1gJ3PKzwBpOoPnTSEM5yd0zHYA=",
+			"path": "github.com/golang/protobuf/protoc-gen-go/descriptor",
+			"revision": "748d386b5c1ea99658fd69fe9f03991ce86a90c1",
+			"revisionTime": "2017-07-26T21:28:29Z"
+		},
+		{
 			"checksumSHA1": "p/8vSviYF91gFflhrt5vkyksroo=",
 			"path": "github.com/golang/snappy",
 			"revision": "553a641470496b2327abcac10b36396bd98e45c9",