aboutsummaryrefslogtreecommitdiffstats
path: root/app/scripts/controllers/transactions.js
blob: a652c327889415b5a717925d6d8ba2cbd1cadb9e (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
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
const EventEmitter = require('events')
const extend = require('xtend')
const clone = require('clone')
const ObservableStore = require('obs-store')
const ethUtil = require('ethereumjs-util')
const EthQuery = require('ethjs-query')
const TxProviderUtil = require('../lib/tx-utils')
const PendingTransactionUtils = require('../lib/pending-tx-watchers')
const getStack = require('../lib/util').getStack
const createId = require('../lib/random-id')
const NonceTracker = require('../lib/nonce-tracker')

module.exports = class TransactionController extends EventEmitter {
  constructor (opts) {
    super()
    this.store = new ObservableStore(extend({
      transactions: [],
    }, opts.initState))
    this.memStore = new ObservableStore({})
    this.networkStore = opts.networkStore || new ObservableStore({})
    this.preferencesStore = opts.preferencesStore || new ObservableStore({})
    this.txHistoryLimit = opts.txHistoryLimit
    this.provider = opts.provider
    this.blockTracker = opts.blockTracker
    this.signEthTx = opts.signTransaction
    this.ethStore = opts.ethStore

    this.nonceTracker = new NonceTracker({
      provider: this.provider,
      getPendingTransactions: (address) => {
        return this.getFilteredTxList({
          from: address,
          status: 'submitted',
          err: undefined,
        })
      },
    })
    this.query = new EthQuery(this.provider)
    this.txProviderUtils = new TxProviderUtil(this.provider)

    this.pendingTxUtils = new PendingTransactionUtils({
      provider: this.provider,
      nonceTracker: this.nonceTracker,
      getBalance: (address) => this.ethStore.getState().accounts[address].balance,
      publishTransaction: this.txProviderUtils.publishTransaction.bind(this.txProviderUtils),
      getPendingTransactions: (address) => {
        return this.getFilteredTxList({
          from: address,
          status: 'submitted',
        })
      },
    })

    this.pendingTxUtils.on('txWarning', this.updateTx.bind(this))
    this.pendingTxUtils.on('txFailed', this.setTxStatusFailed.bind(this))
    this.pendingTxUtils.on('txConfirmed', this.setTxStatusConfirmed.bind(this))

    this.blockTracker.on('rawBlock', this.pendingTxUtils.checkForTxInBlock.bind(this))
    // this is a little messy but until ethstore has been either
    // removed or redone this is to guard against the race condition
    // where ethStore hasent been populated by the results yet
    this.blockTracker.once('latest', () => this.blockTracker.on('latest', this.pendingTxUtils.resubmitPendingTxs.bind(this)))
    this.blockTracker.on('sync', this.pendingTxUtils.queryPendingTxs.bind(this))
    // memstore is computed from a few different stores
    this._updateMemstore()
    this.store.subscribe(() => this._updateMemstore())
    this.networkStore.subscribe(() => this._updateMemstore())
    this.preferencesStore.subscribe(() => this._updateMemstore())
  }

  getState () {
    return this.memStore.getState()
  }

  getNetwork () {
    return this.networkStore.getState()
  }

  getSelectedAddress () {
    return this.preferencesStore.getState().selectedAddress
  }

  // Returns the number of txs for the current network.
  getTxCount () {
    return this.getTxList().length
  }

  // Returns the full tx list across all networks
  getFullTxList () {
    return this.store.getState().transactions
  }

  getUnapprovedTxCount () {
    return Object.keys(this.getUnapprovedTxList()).length
  }

  getPendingTxCount () {
    return this.getTxsByMetaData('status', 'signed').length
  }

  // Returns the tx list
  getTxList () {
    const network = this.getNetwork()
    const fullTxList = this.getFullTxList()
    return this.getTxsByMetaData('metamaskNetworkId', network, fullTxList)
  }

  // gets tx by Id and returns it
  getTx (txId) {
    const txList = this.getTxList()
    const txMeta = txList.find(txData => txData.id === txId)
    return txMeta
  }
  getUnapprovedTxList () {
    const txList = this.getTxList()
    return txList.filter((txMeta) => txMeta.status === 'unapproved')
    .reduce((result, tx) => {
      result[tx.id] = tx
      return result
    }, {})
  }

  updateTx (txMeta) {
    // create txMeta snapshot for history
    const txMetaForHistory = clone(txMeta)
    // dont include previous history in this snapshot
    delete txMetaForHistory.history
    // add stack to help understand why tx was updated
    txMetaForHistory.stack = getStack()
    // add snapshot to tx history
    if (!txMeta.history) txMeta.history = []
    txMeta.history.push(txMetaForHistory)

    const txId = txMeta.id
    const txList = this.getFullTxList()
    const index = txList.findIndex(txData => txData.id === txId)
    if (!txMeta.history) txMeta.history = []
    txMeta.history.push(txMetaForHistory)

    txList[index] = txMeta
    this._saveTxList(txList)
    this.emit('update')
  }

  // Adds a tx to the txlist
  addTx (txMeta) {
    const txCount = this.getTxCount()
    const network = this.getNetwork()
    const fullTxList = this.getFullTxList()
    const txHistoryLimit = this.txHistoryLimit

    // checks if the length of the tx history is
    // longer then desired persistence limit
    // and then if it is removes only confirmed
    // or rejected tx's.
    // not tx's that are pending or unapproved
    if (txCount > txHistoryLimit - 1) {
      const index = fullTxList.findIndex((metaTx) => ((metaTx.status === 'confirmed' || metaTx.status === 'rejected') && network === txMeta.metamaskNetworkId))
      fullTxList.splice(index, 1)
    }
    fullTxList.push(txMeta)
    this._saveTxList(fullTxList)
    this.emit('update')

    this.once(`${txMeta.id}:signed`, function (txId) {
      this.removeAllListeners(`${txMeta.id}:rejected`)
    })
    this.once(`${txMeta.id}:rejected`, function (txId) {
      this.removeAllListeners(`${txMeta.id}:signed`)
    })

    this.emit('updateBadge')
    this.emit(`${txMeta.id}:unapproved`, txMeta)
  }

  async newUnapprovedTransaction (txParams) {
    log.debug(`MetaMaskController newUnapprovedTransaction ${JSON.stringify(txParams)}`)
    const txMeta = await this.addUnapprovedTransaction(txParams)
    this.emit('newUnaprovedTx', txMeta)
    // listen for tx completion (success, fail)
    return new Promise((resolve, reject) => {
      this.once(`${txMeta.id}:finished`, (completedTx) => {
        switch (completedTx.status) {
          case 'submitted':
            return resolve(completedTx.hash)
          case 'rejected':
            return reject(new Error('MetaMask Tx Signature: User denied transaction signature.'))
          default:
            return reject(new Error(`MetaMask Tx Signature: Unknown problem: ${JSON.stringify(completedTx.txParams)}`))
        }
      })
    })
  }

  async addUnapprovedTransaction (txParams) {
    // validate
    await this.txProviderUtils.validateTxParams(txParams)
    // construct txMeta
    const txMeta = {
      id: createId(),
      time: (new Date()).getTime(),
      status: 'unapproved',
      metamaskNetworkId: this.getNetwork(),
      txParams: txParams,
      history: [],
    }
    // add default tx params
    await this.addTxDefaults(txMeta)
    // save txMeta
    this.addTx(txMeta)
    return txMeta
  }

  async addTxDefaults (txMeta) {
    const txParams = txMeta.txParams
    // ensure value
    txParams.value = txParams.value || '0x0'
    if (!txParams.gasPrice) {
      const gasPrice = await this.query.gasPrice()
      txParams.gasPrice = gasPrice
    }
    // set gasLimit
    return await this.txProviderUtils.analyzeGasUsage(txMeta)
  }

  async updateAndApproveTransaction (txMeta) {
    this.updateTx(txMeta)
    await this.approveTransaction(txMeta.id)
  }

  async approveTransaction (txId) {
    let nonceLock
    try {
      // approve
      this.setTxStatusApproved(txId)
      // get next nonce
      const txMeta = this.getTx(txId)
      const fromAddress = txMeta.txParams.from
      // wait for a nonce
      nonceLock = await this.nonceTracker.getNonceLock(fromAddress)
      // add nonce to txParams
      txMeta.txParams.nonce = nonceLock.nextNonce
      // add nonce debugging information to txMeta
      txMeta.nonceDetails = nonceLock.nonceDetails
      this.updateTx(txMeta)
      // sign transaction
      const rawTx = await this.signTransaction(txId)
      await this.publishTransaction(txId, rawTx)
      // must set transaction to submitted/failed before releasing lock
      nonceLock.releaseLock()
    } catch (err) {
      if (!err.message) err.message = 'Transaction failed during approval'
      this.setTxStatusFailed(txId, err)
      // must set transaction to submitted/failed before releasing lock
      if (nonceLock) nonceLock.releaseLock()
      // continue with error chain
      throw err
    }
  }

  async signTransaction (txId) {
    const txMeta = this.getTx(txId)
    const txParams = txMeta.txParams
    const fromAddress = txParams.from
    // add network/chain id
    txParams.chainId = this.getChainId()
    const ethTx = this.txProviderUtils.buildEthTxFromParams(txParams)
    await this.signEthTx(ethTx, fromAddress)
    this.setTxStatusSigned(txMeta.id)
    const rawTx = ethUtil.bufferToHex(ethTx.serialize())
    return rawTx
  }

  async publishTransaction (txId, rawTx) {
    const txMeta = this.getTx(txId)
    txMeta.rawTx = rawTx
    this.updateTx(txMeta)
    const txHash = await this.txProviderUtils.publishTransaction(rawTx)
    this.setTxHash(txId, txHash)
    this.setTxStatusSubmitted(txId)
  }

  async cancelTransaction (txId) {
    this.setTxStatusRejected(txId)
  }


  getChainId () {
    const networkState = this.networkStore.getState()
    const getChainId = parseInt(networkState)
    if (Number.isNaN(getChainId)) {
      return 0
    } else {
      return getChainId
    }
  }

  // receives a txHash records the tx as signed
  setTxHash (txId, txHash) {
    // Add the tx hash to the persisted meta-tx object
    const txMeta = this.getTx(txId)
    txMeta.hash = txHash
    this.updateTx(txMeta)
  }

  /*
  Takes an object of fields to search for eg:
  let thingsToLookFor = {
    to: '0x0..',
    from: '0x0..',
    status: 'signed',
    err: undefined,
  }
  and returns a list of tx with all
  options matching

  ****************HINT****************
  | `err: undefined` is like looking |
  | for a tx with no err             |
  | so you can also search txs that  |
  | dont have something as well by   |
  | setting the value as undefined   |
  ************************************

  this is for things like filtering a the tx list
  for only tx's from 1 account
  or for filltering for all txs from one account
  and that have been 'confirmed'
  */
  getFilteredTxList (opts) {
    let filteredTxList
    Object.keys(opts).forEach((key) => {
      filteredTxList = this.getTxsByMetaData(key, opts[key], filteredTxList)
    })
    return filteredTxList
  }

  getTxsByMetaData (key, value, txList = this.getTxList()) {
    return txList.filter((txMeta) => {
      if (txMeta.txParams[key]) {
        return txMeta.txParams[key] === value
      } else {
        return txMeta[key] === value
      }
    })
  }

  // STATUS METHODS
  // get::set status

  // should return the status of the tx.
  getTxStatus (txId) {
    const txMeta = this.getTx(txId)
    return txMeta.status
  }

  // should update the status of the tx to 'rejected'.
  setTxStatusRejected (txId) {
    this._setTxStatus(txId, 'rejected')
  }

  // should update the status of the tx to 'approved'.
  setTxStatusApproved (txId) {
    this._setTxStatus(txId, 'approved')
  }

  // should update the status of the tx to 'signed'.
  setTxStatusSigned (txId) {
    this._setTxStatus(txId, 'signed')
  }

  // should update the status of the tx to 'submitted'.
  setTxStatusSubmitted (txId) {
    this._setTxStatus(txId, 'submitted')
  }

  // should update the status of the tx to 'confirmed'.
  setTxStatusConfirmed (txId) {
    this._setTxStatus(txId, 'confirmed')
  }

  setTxStatusFailed (txId, reason) {
    const txMeta = this.getTx(txId)
    txMeta.err = reason
    this.updateTx(txMeta)
    this._setTxStatus(txId, 'failed')
  }

  // merges txParams obj onto txData.txParams
  // use extend to ensure that all fields are filled
  updateTxParams (txId, txParams) {
    const txMeta = this.getTx(txId)
    txMeta.txParams = extend(txMeta.txParams, txParams)
    this.updateTx(txMeta)
  }

/* _____________________________________
|                                      |
|           PRIVATE METHODS            |
|______________________________________*/


  //  Should find the tx in the tx list and
  //  update it.
  //  should set the status in txData
  //    - `'unapproved'` the user has not responded
  //    - `'rejected'` the user has responded no!
  //    - `'approved'` the user has approved the tx
  //    - `'signed'` the tx is signed
  //    - `'submitted'` the tx is sent to a server
  //    - `'confirmed'` the tx has been included in a block.
  //    - `'failed'` the tx failed for some reason, included on tx data.
  _setTxStatus (txId, status) {
    const txMeta = this.getTx(txId)
    txMeta.status = status
    this.emit(`${txMeta.id}:${status}`, txId)
    if (status === 'submitted' || status === 'rejected') {
      this.emit(`${txMeta.id}:finished`, txMeta)
    }
    this.updateTx(txMeta)
    this.emit('updateBadge')
  }

  // Saves the new/updated txList.
  // Function is intended only for internal use
  _saveTxList (transactions) {
    this.store.updateState({ transactions })
  }

  _updateMemstore () {
    const unapprovedTxs = this.getUnapprovedTxList()
    const selectedAddressTxList = this.getFilteredTxList({
      from: this.getSelectedAddress(),
      metamaskNetworkId: this.getNetwork(),
    })
    this.memStore.updateState({ unapprovedTxs, selectedAddressTxList })
  }
}