aboutsummaryrefslogtreecommitdiffstats
path: root/app/scripts/background.js
blob: 4f537b30a774b03f0de90d3d4aa060963a055c37 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
const urlUtil = require('url')
const Dnode = require('dnode')
const eos = require('end-of-stream')
const combineStreams = require('pumpify')
const extend = require('xtend')
const EthStore = require('eth-store')
const MetaMaskProvider = require('web3-provider-engine/zero.js')
const ObjectMultiplex = require('./lib/obj-multiplex')
const PortStream = require('./lib/port-stream.js')
const IdentityStore = require('./lib/idStore')
const createUnlockRequestNotification = require('./lib/notifications.js').createUnlockRequestNotification
const createTxNotification = require('./lib/notifications.js').createTxNotification
const createMsgNotification = require('./lib/notifications.js').createMsgNotification
const configManager = require('./lib/config-manager-singleton')
const messageManager = require('./lib/message-manager')
const setupMultiplex = require('./lib/stream-utils.js').setupMultiplex
const HostStore = require('./lib/remote-store.js').HostStore
const Web3 = require('web3')

//
// connect to other contexts
//

chrome.runtime.onConnect.addListener(connectRemote)
function connectRemote(remotePort){
  var isMetaMaskInternalProcess = (remotePort.name === 'popup')
  var portStream = new PortStream(remotePort)
  if (isMetaMaskInternalProcess) {
    // communication with popup
    setupTrustedCommunication(portStream, 'MetaMask')
  } else {
    // communication with page
    var originDomain = urlUtil.parse(remotePort.sender.url).hostname
    setupUntrustedCommunication(portStream, originDomain)
  }
}

function setupUntrustedCommunication(connectionStream, originDomain){
  // setup multiplexing
  var mx = setupMultiplex(connectionStream)
  // connect features
  setupProviderConnection(mx.createStream('provider'), originDomain)
  setupPublicConfig(mx.createStream('publicConfig'))
}

function setupTrustedCommunication(connectionStream, originDomain){
  // setup multiplexing
  var mx = setupMultiplex(connectionStream)
  // connect features
  setupControllerConnection(mx.createStream('controller'))
  setupProviderConnection(mx.createStream('provider'), originDomain)
}

//
// state and network
//

var providerConfig = configManager.getProvider()
var idStore = new IdentityStore()

var providerOpts = {
  rpcUrl: configManager.getCurrentRpcAddress(),
  // account mgmt
  getAccounts: function(cb){
    var selectedAddress = idStore.getSelectedAddress()
    var result = selectedAddress ? [selectedAddress] : []
    cb(null, result)
  },
  // tx signing
  approveTransaction: newUnsignedTransaction,
  signTransaction: idStore.signTransaction.bind(idStore),
  // msg signing
  approveMessage: newUnsignedMessage,
  signMessage: idStore.signMessage.bind(idStore),
}
var provider = MetaMaskProvider(providerOpts)
var web3 = new Web3(provider)
idStore.web3 = web3
idStore.getNetwork(3)

// log new blocks
provider.on('block', function(block){
  console.log('BLOCK CHANGED:', '#'+block.number.toString('hex'), '0x'+block.hash.toString('hex'))
})

var ethStore = new EthStore(provider)
idStore.setStore(ethStore)

function getState(){
  var state = extend(
    ethStore.getState(),
    idStore.getState(),
    configManager.getConfig()
  )
  return state
}

//
// public store
//

// get init state
var initPublicState = extend(
  idStoreToPublic(idStore.getState()),
  configToPublic(configManager.getConfig())
)

var publicConfigStore = new HostStore(initPublicState)

// subscribe to changes
configManager.subscribe(function(state){
  storeSetFromObj(publicConfigStore, configToPublic(state))
})
idStore.on('update', function(state){
  storeSetFromObj(publicConfigStore, idStoreToPublic(state))
})

// idStore substate
function idStoreToPublic(state){
  return {
    selectedAddress: state.selectedAddress,
  }
}
// config substate
function configToPublic(state){
  return {
    provider: state.provider,
  }
}
// dump obj into store
function storeSetFromObj(store, obj){
  Object.keys(obj).forEach(function(key){
    store.set(key, obj[key])
  })
}


//
// remote features
//

function setupPublicConfig(stream){
  var storeStream = publicConfigStore.createStream()
  stream.pipe(storeStream).pipe(stream)
}

function setupProviderConnection(stream, originDomain){
  
  stream.on('data', function onRpcRequest(payload){
    // Append origin to rpc payload
    payload.origin = originDomain
    // Append origin to signature request
    if (payload.method === 'eth_sendTransaction') {
      payload.params[0].origin = originDomain
    } else if (payload.method === 'eth_sign') {
      payload.params.push(originDomain)
    }
    // handle rpc request
    provider.sendAsync(payload, function onPayloadHandled(err, response){
      logger(null, payload, response)
      try {
        stream.write(response)
      } catch (err) {
        logger(err)
      }
    })
  })

  function logger(err, request, response){
    if (err) return console.error(err.stack)
    if (!request.isMetamaskInternal) {
      console.log(`RPC (${originDomain}):`, request, '->', response)
      if (response.error) console.error('Error in RPC response:\n'+response.error.message)
    }
  }
}

function setupControllerConnection(stream){
  var dnode = Dnode({
    getState:           function(cb){ cb(null, getState()) },
    setRpcTarget:       setRpcTarget,
    setProviderType:    setProviderType,
    useEtherscanProvider: useEtherscanProvider,
    // forward directly to idStore
    createNewVault:     idStore.createNewVault.bind(idStore),
    recoverFromSeed:    idStore.recoverFromSeed.bind(idStore),
    submitPassword:     idStore.submitPassword.bind(idStore),
    setSelectedAddress: idStore.setSelectedAddress.bind(idStore),
    approveTransaction: idStore.approveTransaction.bind(idStore),
    cancelTransaction:  idStore.cancelTransaction.bind(idStore),
    signMessage:        idStore.signMessage.bind(idStore),
    cancelMessage:      idStore.cancelMessage.bind(idStore),
    setLocked:          idStore.setLocked.bind(idStore),
    clearSeedWordCache: idStore.clearSeedWordCache.bind(idStore),
    exportAccount:      idStore.exportAccount.bind(idStore),
    revealAccount:      idStore.revealAccount.bind(idStore),
    saveAccountLabel:   idStore.saveAccountLabel.bind(idStore),
  })
  stream.pipe(dnode).pipe(stream)
  dnode.on('remote', function(remote){

    // push updates to popup
    ethStore.on('update', sendUpdate)
    idStore.on('update', sendUpdate)
    // teardown on disconnect
    eos(stream, function unsubscribe(){
      ethStore.removeListener('update', sendUpdate)
    })
    function sendUpdate(){
      var state = getState()
      remote.sendUpdate(state)
    }

  })
}

//
// plugin badge text
//

idStore.on('update', updateBadge)

function updateBadge(state){
  var label = ''
  var unconfTxs = configManager.unconfirmedTxs()
  var unconfTxLen = Object.keys(unconfTxs).length
  var unconfMsgs = messageManager.unconfirmedMsgs()
  var unconfMsgLen = Object.keys(unconfMsgs).length
  var count = unconfTxLen + unconfMsgLen
  if (count) {
    label = String(count)
  }
  chrome.browserAction.setBadgeText({ text: label })
  chrome.browserAction.setBadgeBackgroundColor({ color: '#506F8B' })
}

//
// Add unconfirmed Tx + Msg
//

function newUnsignedTransaction(txParams, cb){
  var state = idStore.getState()
  if (!state.isUnlocked) {
    createUnlockRequestNotification({
      title: 'Account Unlock Request',
    })
    var txId = idStore.addUnconfirmedTransaction(txParams, cb)
  } else {
    addUnconfirmedTx(txParams, cb)    
  }
}

function newUnsignedMessage(msgParams, cb){
  var state = idStore.getState()
  if (!state.isUnlocked) {
    createUnlockRequestNotification({
      title: 'Account Unlock Request',
    })
    var msgId = idStore.addUnconfirmedMessage(msgParams, cb)
  } else {
    addUnconfirmedMsg(msgParams, cb)    
  }
}

function addUnconfirmedTx(txParams, cb){
  var txId = idStore.addUnconfirmedTransaction(txParams, cb)
  createTxNotification({
    title: 'New Unsigned Transaction',
    txParams: txParams,
    confirm: idStore.approveTransaction.bind(idStore, txId, noop),
    cancel: idStore.cancelTransaction.bind(idStore, txId),
  })
}

function addUnconfirmedMsg(msgParams, cb){
  var msgId = idStore.addUnconfirmedMessage(msgParams, cb)
  createMsgNotification({
    title: 'New Unsigned Message',
    msgParams: msgParams,
    confirm: idStore.approveMessage.bind(idStore, msgId, noop),
    cancel: idStore.cancelMessage.bind(idStore, msgId),
  })
}

//
// config
//

// called from popup
function setRpcTarget(rpcTarget){
  configManager.setRpcTarget(rpcTarget)
  chrome.runtime.reload()
  idStore.getNetwork(3) // 3 retry attempts
}

function setProviderType(type) {
  configManager.setProviderType(type)
  chrome.runtime.reload()
  idStore.getNetwork(3)
}

function useEtherscanProvider() {
  configManager.useEtherscanProvider()
  chrome.runtime.reload()
}

// util

function noop(){}