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package ethui
import (
"bytes"
"fmt"
"github.com/ethereum/eth-go"
"github.com/ethereum/eth-go/ethchain"
"github.com/ethereum/eth-go/ethdb"
"github.com/ethereum/eth-go/ethpub"
"github.com/ethereum/eth-go/ethutil"
"github.com/go-qml/qml"
"github.com/obscuren/mutan"
"math/big"
"strings"
)
type Gui struct {
// The main application window
win *qml.Window
// QML Engine
engine *qml.Engine
component *qml.Common
// The ethereum interface
eth *eth.Ethereum
// The public Ethereum library
lib *EthLib
txDb *ethdb.LDBDatabase
addr []byte
pub *ethpub.PEthereum
}
// Create GUI, but doesn't start it
func New(ethereum *eth.Ethereum) *Gui {
lib := &EthLib{stateManager: ethereum.StateManager(), blockChain: ethereum.BlockChain(), txPool: ethereum.TxPool()}
db, err := ethdb.NewLDBDatabase("tx_database")
if err != nil {
panic(err)
}
data, _ := ethutil.Config.Db.Get([]byte("KeyRing"))
// On first run we won't have any keys yet, so this would crash.
// Therefor we check if we are ready to actually start this process
var addr []byte
if len(data) > 0 {
key := ethutil.Config.Db.GetKeys()[0]
addr = key.Address()
//ethereum.StateManager().WatchAddr(addr)
}
pub := ethpub.NewPEthereum(ethereum.StateManager(), ethereum.BlockChain(), ethereum.TxPool())
return &Gui{eth: ethereum, lib: lib, txDb: db, addr: addr, pub: pub}
}
func (gui *Gui) Start(assetPath string) {
defer gui.txDb.Close()
// Register ethereum functions
qml.RegisterTypes("Ethereum", 1, 0, []qml.TypeSpec{{
Init: func(p *ethpub.PBlock, obj qml.Object) { p.Number = 0; p.Hash = "" },
}, {
Init: func(p *ethpub.PTx, obj qml.Object) { p.Value = ""; p.Hash = ""; p.Address = "" },
}})
ethutil.Config.SetClientString(fmt.Sprintf("/Ethereal v%s", "0.5.0 RC2"))
ethutil.Config.Log.Infoln("[GUI] Starting GUI")
// Create a new QML engine
gui.engine = qml.NewEngine()
context := gui.engine.Context()
// Expose the eth library and the ui library to QML
context.SetVar("eth", gui)
uiLib := NewUiLib(gui.engine, gui.eth, assetPath)
context.SetVar("ui", uiLib)
// Load the main QML interface
data, _ := ethutil.Config.Db.Get([]byte("KeyRing"))
var err error
var component qml.Object
firstRun := len(data) == 0
if firstRun {
component, err = gui.engine.LoadFile(uiLib.AssetPath("qml/first_run.qml"))
} else {
component, err = gui.engine.LoadFile(uiLib.AssetPath("qml/wallet.qml"))
}
if err != nil {
ethutil.Config.Log.Infoln("FATAL: asset not found: you can set an alternative asset path on on the command line using option 'asset_path'")
panic(err)
}
gui.win = component.CreateWindow(nil)
uiLib.win = gui.win
db := &Debugger{gui.win, make(chan bool)}
gui.lib.Db = db
uiLib.Db = db
// Add the ui as a log system so we can log directly to the UGI
ethutil.Config.Log.AddLogSystem(gui)
// Loads previous blocks
if firstRun == false {
go gui.setInitialBlockChain()
go gui.readPreviousTransactions()
go gui.update()
}
gui.win.Show()
gui.win.Wait()
gui.eth.Stop()
}
func (gui *Gui) setInitialBlockChain() {
// Load previous 10 blocks
chain := gui.eth.BlockChain().GetChain(gui.eth.BlockChain().CurrentBlock.Hash(), 10)
for _, block := range chain {
gui.processBlock(block)
}
}
func (gui *Gui) readPreviousTransactions() {
it := gui.txDb.Db().NewIterator(nil, nil)
for it.Next() {
tx := ethchain.NewTransactionFromBytes(it.Value())
gui.win.Root().Call("addTx", ethpub.NewPTx(tx))
}
it.Release()
}
func (gui *Gui) processBlock(block *ethchain.Block) {
gui.win.Root().Call("addBlock", ethpub.NewPBlock(block))
}
// Simple go routine function that updates the list of peers in the GUI
func (gui *Gui) update() {
txChan := make(chan ethchain.TxMsg, 1)
gui.eth.TxPool().Subscribe(txChan)
state := gui.eth.StateManager().TransState()
unconfirmedFunds := new(big.Int)
gui.win.Root().Call("setWalletValue", fmt.Sprintf("%v", ethutil.CurrencyToString(state.GetStateObject(gui.addr).Amount)))
for {
select {
case txMsg := <-txChan:
tx := txMsg.Tx
if txMsg.Type == ethchain.TxPre {
object := state.GetStateObject(gui.addr)
if bytes.Compare(tx.Sender(), gui.addr) == 0 && object.Nonce <= tx.Nonce {
gui.win.Root().Call("addTx", ethpub.NewPTx(tx))
gui.txDb.Put(tx.Hash(), tx.RlpEncode())
object.Nonce += 1
state.SetStateObject(object)
unconfirmedFunds.Sub(unconfirmedFunds, tx.Value)
} else if bytes.Compare(tx.Recipient, gui.addr) == 0 {
gui.win.Root().Call("addTx", ethpub.NewPTx(tx))
gui.txDb.Put(tx.Hash(), tx.RlpEncode())
unconfirmedFunds.Add(unconfirmedFunds, tx.Value)
}
pos := "+"
if unconfirmedFunds.Cmp(big.NewInt(0)) >= 0 {
pos = "-"
}
val := ethutil.CurrencyToString(new(big.Int).Abs(ethutil.BigCopy(unconfirmedFunds)))
str := fmt.Sprintf("%v (%s %v)", ethutil.CurrencyToString(object.Amount), pos, val)
gui.win.Root().Call("setWalletValue", str)
} else {
object := state.GetStateObject(gui.addr)
if bytes.Compare(tx.Sender(), gui.addr) == 0 {
object.SubAmount(tx.Value)
} else if bytes.Compare(tx.Recipient, gui.addr) == 0 {
object.AddAmount(tx.Value)
}
gui.win.Root().Call("setWalletValue", fmt.Sprintf("%v", ethutil.CurrencyToString(object.Amount)))
state.SetStateObject(object)
}
}
}
}
// Logging functions that log directly to the GUI interface
func (gui *Gui) Println(v ...interface{}) {
str := strings.TrimRight(fmt.Sprintln(v...), "\n")
lines := strings.Split(str, "\n")
for _, line := range lines {
gui.win.Root().Call("addLog", line)
}
}
func (gui *Gui) Printf(format string, v ...interface{}) {
str := strings.TrimRight(fmt.Sprintf(format, v...), "\n")
lines := strings.Split(str, "\n")
for _, line := range lines {
gui.win.Root().Call("addLog", line)
}
}
func (gui *Gui) Transact(recipient, value, gas, gasPrice, data string) (*ethpub.PReceipt, error) {
keyPair := ethutil.Config.Db.GetKeys()[0]
return gui.pub.Transact(ethutil.Hex(keyPair.PrivateKey), recipient, value, gas, gasPrice, data)
}
func (gui *Gui) Create(recipient, value, gas, gasPrice, data string) (*ethpub.PReceipt, error) {
keyPair := ethutil.Config.Db.GetKeys()[0]
mainInput, initInput := mutan.PreProcess(data)
return gui.pub.Create(ethutil.Hex(keyPair.PrivateKey), value, gas, gasPrice, initInput, mainInput)
}
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