aboutsummaryrefslogtreecommitdiffstats
path: root/app/scripts/keyring-controller.js
blob: 16df6efa66c1f9cf15c3f6daca0a4c735a818c09 (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
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
const ethUtil = require('ethereumjs-util')
const BN = ethUtil.BN
const bip39 = require('bip39')
const EventEmitter = require('events').EventEmitter
const ObservableStore = require('obs-store')
const filter = require('promise-filter')
const encryptor = require('browser-passworder')
const sigUtil = require('eth-sig-util')
const normalizeAddress = sigUtil.normalize
// Keyrings:
const SimpleKeyring = require('eth-simple-keyring')
const HdKeyring = require('eth-hd-keyring')
const keyringTypes = [
  SimpleKeyring,
  HdKeyring,
]

class KeyringController extends EventEmitter {

  // PUBLIC METHODS
  //
  // THE FIRST SECTION OF METHODS ARE PUBLIC-FACING,
  // MEANING THEY ARE USED BY CONSUMERS OF THIS CLASS.
  //
  // THEIR SURFACE AREA SHOULD BE CHANGED WITH GREAT CARE.

  constructor (opts) {
    super()
    const initState = opts.initState || {}
    this.keyringTypes = keyringTypes
    this.store = new ObservableStore(initState)
    this.memStore = new ObservableStore({
      isUnlocked: false,
      keyringTypes: this.keyringTypes.map(krt => krt.type),
      keyrings: [],
      identities: {},
    })
    this.ethStore = opts.ethStore
    this.encryptor = encryptor
    this.keyrings = []
    this.getNetwork = opts.getNetwork
  }

  // Full Update
  // returns Promise( @object state )
  //
  // Emits the `update` event and
  // returns a Promise that resolves to the current state.
  //
  // Frequently used to end asynchronous chains in this class,
  // indicating consumers can often either listen for updates,
  // or accept a state-resolving promise to consume their results.
  //
  // Not all methods end with this, that might be a nice refactor.
  fullUpdate () {
    this.emit('update')
    return Promise.resolve(this.memStore.getState())
  }

  // Create New Vault And Keychain
  // @string password - The password to encrypt the vault with
  //
  // returns Promise( @object state )
  //
  // Destroys any old encrypted storage,
  // creates a new encrypted store with the given password,
  // randomly creates a new HD wallet with 1 account,
  // faucets that account on the testnet.
  createNewVaultAndKeychain (password) {
    return this.persistAllKeyrings(password)
    .then(this.createFirstKeyTree.bind(this))
    .then(this.fullUpdate.bind(this))
  }

  // CreateNewVaultAndRestore
  // @string password - The password to encrypt the vault with
  // @string seed - The BIP44-compliant seed phrase.
  //
  // returns Promise( @object state )
  //
  // Destroys any old encrypted storage,
  // creates a new encrypted store with the given password,
  // creates a new HD wallet from the given seed with 1 account.
  createNewVaultAndRestore (password, seed) {
    if (typeof password !== 'string') {
      return Promise.reject('Password must be text.')
    }

    if (!bip39.validateMnemonic(seed)) {
      return Promise.reject('Seed phrase is invalid.')
    }

    this.clearKeyrings()

    return this.persistAllKeyrings(password)
    .then(() => {
      return this.addNewKeyring('HD Key Tree', {
        mnemonic: seed,
        numberOfAccounts: 1,
      })
    })
    .then((firstKeyring) => {
      return firstKeyring.getAccounts()
    })
    .then((accounts) => {
      const firstAccount = accounts[0]
      if (!firstAccount) throw new Error('KeyringController - First Account not found.')
      const hexAccount = normalizeAddress(firstAccount)
      this.emit('newAccount', hexAccount)
      return this.setupAccounts(accounts)
    })
    .then(this.persistAllKeyrings.bind(this, password))
    .then(this.fullUpdate.bind(this))
  }

  // Set Locked
  // returns Promise( @object state )
  //
  // This method deallocates all secrets, and effectively locks metamask.
  setLocked () {
    // set locked
    this.password = null
    this.memStore.updateState({ isUnlocked: false })
    // remove keyrings
    this.keyrings = []
    this._updateMemStoreKeyrings()
    return this.fullUpdate()
  }

  // Submit Password
  // @string password
  //
  // returns Promise( @object state )
  //
  // Attempts to decrypt the current vault and load its keyrings
  // into memory.
  //
  // Temporarily also migrates any old-style vaults first, as well.
  // (Pre MetaMask 3.0.0)
  submitPassword (password) {
    return this.unlockKeyrings(password)
    .then((keyrings) => {
      this.keyrings = keyrings
      return this.fullUpdate()
    })
  }

  // Add New Keyring
  // @string type
  // @object opts
  //
  // returns Promise( @Keyring keyring )
  //
  // Adds a new Keyring of the given `type` to the vault
  // and the current decrypted Keyrings array.
  //
  // All Keyring classes implement a unique `type` string,
  // and this is used to retrieve them from the keyringTypes array.
  addNewKeyring (type, opts) {
    const Keyring = this.getKeyringClassForType(type)
    const keyring = new Keyring(opts)
    return keyring.deserialize(opts)
    .then(() => {
      return keyring.getAccounts()
    })
    .then((accounts) => {
      return this.checkForDuplicate(type, accounts)
    })
    .then((checkedAccounts) => {
      this.keyrings.push(keyring)
      return this.setupAccounts(checkedAccounts)
    })
    .then(() => this.persistAllKeyrings())
    .then(() => this.fullUpdate())
    .then(() => {
      this._updateMemStoreKeyrings()
      return keyring
    })
  }

  // For now just checks for simple key pairs
  // but in the future
  // should possibly add HD and other types
  //
  checkForDuplicate (type, newAccount) {
    return this.getAccounts()
    .then((accounts) => {
      switch (type) {
        case 'Simple Key Pair':
          let isNotIncluded = !accounts.find((key) => key === newAccount[0] || key === ethUtil.stripHexPrefix(newAccount[0]))
          return (isNotIncluded) ? Promise.resolve(newAccount) : Promise.reject(new Error('The account you\'re are trying to import is a duplicate'))
        default:
          return Promise.resolve(newAccount)
      }
    })
  }


  // Add New Account
  // @number keyRingNum
  //
  // returns Promise( @object state )
  //
  // Calls the `addAccounts` method on the Keyring
  // in the kryings array at index `keyringNum`,
  // and then saves those changes.
  addNewAccount (selectedKeyring) {
    return selectedKeyring.addAccounts(1)
    .then(this.setupAccounts.bind(this))
    .then(this.persistAllKeyrings.bind(this))
    .then(this.fullUpdate.bind(this))
  }

  // Save Account Label
  // @string account
  // @string label
  //
  // returns Promise( @string label )
  //
  // Persists a nickname equal to `label` for the specified account.
  saveAccountLabel (account, label) {
    try {
      const hexAddress = normalizeAddress(account)
      // update state on diskStore
      const state = this.store.getState()
      const walletNicknames = state.walletNicknames || {}
      walletNicknames[hexAddress] = label
      this.store.updateState({ walletNicknames })
      // update state on memStore
      const identities = this.memStore.getState().identities
      identities[hexAddress].name = label
      this.memStore.updateState({ identities })
      return Promise.resolve(label)
    } catch (err) {
      return Promise.reject(err)
    }
  }

  // Export Account
  // @string address
  //
  // returns Promise( @string privateKey )
  //
  // Requests the private key from the keyring controlling
  // the specified address.
  //
  // Returns a Promise that may resolve with the private key string.
  exportAccount (address) {
    try {
      return this.getKeyringForAccount(address)
      .then((keyring) => {
        return keyring.exportAccount(normalizeAddress(address))
      })
    } catch (e) {
      return Promise.reject(e)
    }
  }


  // SIGNING METHODS
  //
  // This method signs tx and returns a promise for
  // TX Manager to update the state after signing

  signTransaction (ethTx, _fromAddress) {
    const fromAddress = normalizeAddress(_fromAddress)
    return this.getKeyringForAccount(fromAddress)
    .then((keyring) => {
      return keyring.signTransaction(fromAddress, ethTx)
    })
  }

  // Sign Message
  // @object msgParams
  //
  // returns Promise(@buffer rawSig)
  //
  // Attempts to sign the provided @object msgParams.
  signMessage (msgParams) {
    const address = normalizeAddress(msgParams.from)
    return this.getKeyringForAccount(address)
    .then((keyring) => {
      return keyring.signMessage(address, msgParams.data)
    })
  }

  // Sign Personal Message
  // @object msgParams
  //
  // returns Promise(@buffer rawSig)
  //
  // Attempts to sign the provided @object msgParams.
  // Prefixes the hash before signing as per the new geth behavior.
  signPersonalMessage (msgParams) {
    const address = normalizeAddress(msgParams.from)
    return this.getKeyringForAccount(address)
    .then((keyring) => {
      return keyring.signPersonalMessage(address, msgParams.data)
    })
  }

  // PRIVATE METHODS
  //
  // THESE METHODS ARE ONLY USED INTERNALLY TO THE KEYRING-CONTROLLER
  // AND SO MAY BE CHANGED MORE LIBERALLY THAN THE ABOVE METHODS.

  // Create First Key Tree
  // returns @Promise
  //
  // Clears the vault,
  // creates a new one,
  // creates a random new HD Keyring with 1 account,
  // makes that account the selected account,
  // faucets that account on testnet,
  // puts the current seed words into the state tree.
  createFirstKeyTree () {
    this.clearKeyrings()
    return this.addNewKeyring('HD Key Tree', { numberOfAccounts: 1 })
    .then((keyring) => {
      return keyring.getAccounts()
    })
    .then((accounts) => {
      const firstAccount = accounts[0]
      if (!firstAccount) throw new Error('KeyringController - No account found on keychain.')
      const hexAccount = normalizeAddress(firstAccount)
      this.emit('newAccount', hexAccount)
      this.emit('newVault', hexAccount)
      return this.setupAccounts(accounts)
    })
    .then(this.persistAllKeyrings.bind(this))
  }

  // Setup Accounts
  // @array accounts
  //
  // returns @Promise(@object account)
  //
  // Initializes the provided account array
  // Gives them numerically incremented nicknames,
  // and adds them to the ethStore for regular balance checking.
  setupAccounts (accounts) {
    return this.getAccounts()
    .then((loadedAccounts) => {
      const arr = accounts || loadedAccounts
      return Promise.all(arr.map((account) => {
        return this.getBalanceAndNickname(account)
      }))
    })
  }

  // Get Balance And Nickname
  // @string account
  //
  // returns Promise( @string label )
  //
  // Takes an account address and an iterator representing
  // the current number of named accounts.
  getBalanceAndNickname (account) {
    if (!account) {
      throw new Error('Problem loading account.')
    }
    const address = normalizeAddress(account)
    this.ethStore.addAccount(address)
    return this.createNickname(address)
  }

  // Create Nickname
  // @string address
  //
  // returns Promise( @string label )
  //
  // Takes an address, and assigns it an incremented nickname, persisting it.
  createNickname (address) {
    const hexAddress = normalizeAddress(address)
    const identities = this.memStore.getState().identities
    const currentIdentityCount = Object.keys(identities).length + 1
    const nicknames = this.store.getState().walletNicknames || {}
    const existingNickname = nicknames[hexAddress]
    const name = existingNickname || `Account ${currentIdentityCount}`
    identities[hexAddress] = {
      address: hexAddress,
      name,
    }
    this.memStore.updateState({ identities })
    return this.saveAccountLabel(hexAddress, name)
  }

  // Persist All Keyrings
  // @password string
  //
  // returns Promise
  //
  // Iterates the current `keyrings` array,
  // serializes each one into a serialized array,
  // encrypts that array with the provided `password`,
  // and persists that encrypted string to storage.
  persistAllKeyrings (password = this.password) {
    if (typeof password === 'string') {
      this.password = password
      this.memStore.updateState({ isUnlocked: true })
    }
    return Promise.all(this.keyrings.map((keyring) => {
      return Promise.all([keyring.type, keyring.serialize()])
      .then((serializedKeyringArray) => {
        // Label the output values on each serialized Keyring:
        return {
          type: serializedKeyringArray[0],
          data: serializedKeyringArray[1],
        }
      })
    }))
    .then((serializedKeyrings) => {
      return this.encryptor.encrypt(this.password, serializedKeyrings)
    })
    .then((encryptedString) => {
      this.store.updateState({ vault: encryptedString })
      return true
    })
  }

  // Unlock Keyrings
  // @string password
  //
  // returns Promise( @array keyrings )
  //
  // Attempts to unlock the persisted encrypted storage,
  // initializing the persisted keyrings to RAM.
  unlockKeyrings (password) {
    const encryptedVault = this.store.getState().vault
    if (!encryptedVault) {
      throw new Error('Cannot unlock without a previous vault.')
    }

    return this.encryptor.decrypt(password, encryptedVault)
    .then((vault) => {
      this.password = password
      this.memStore.updateState({ isUnlocked: true })
      vault.forEach(this.restoreKeyring.bind(this))
      return this.keyrings
    })
  }

  // Restore Keyring
  // @object serialized
  //
  // returns Promise( @Keyring deserialized )
  //
  // Attempts to initialize a new keyring from the provided
  // serialized payload.
  //
  // On success, returns the resulting @Keyring instance.
  restoreKeyring (serialized) {
    const { type, data } = serialized

    const Keyring = this.getKeyringClassForType(type)
    const keyring = new Keyring()
    return keyring.deserialize(data)
    .then(() => {
      return keyring.getAccounts()
    })
    .then((accounts) => {
      return this.setupAccounts(accounts)
    })
    .then(() => {
      this.keyrings.push(keyring)
      this._updateMemStoreKeyrings()
      return keyring
    })
  }

  // Get Keyring Class For Type
  // @string type
  //
  // Returns @class Keyring
  //
  // Searches the current `keyringTypes` array
  // for a Keyring class whose unique `type` property
  // matches the provided `type`,
  // returning it if it exists.
  getKeyringClassForType (type) {
    return this.keyringTypes.find(kr => kr.type === type)
  }

  getKeyringsByType (type) {
    return this.keyrings.filter((keyring) => keyring.type === type)
  }

  // Get Accounts
  // returns Promise( @Array[ @string accounts ] )
  //
  // Returns the public addresses of all current accounts
  // managed by all currently unlocked keyrings.
  getAccounts () {
    const keyrings = this.keyrings || []
    return Promise.all(keyrings.map(kr => kr.getAccounts()))
    .then((keyringArrays) => {
      return keyringArrays.reduce((res, arr) => {
        return res.concat(arr)
      }, [])
    })
  }

  // Get Keyring For Account
  // @string address
  //
  // returns Promise(@Keyring keyring)
  //
  // Returns the currently initialized keyring that manages
  // the specified `address` if one exists.
  getKeyringForAccount (address) {
    const hexed = normalizeAddress(address)
    log.debug(`KeyringController - getKeyringForAccount: ${hexed}`)

    return Promise.all(this.keyrings.map((keyring) => {
      return Promise.all([
        keyring,
        keyring.getAccounts(),
      ])
    }))
    .then(filter((candidate) => {
      const accounts = candidate[1].map(normalizeAddress)
      return accounts.includes(hexed)
    }))
    .then((winners) => {
      if (winners && winners.length > 0) {
        return winners[0][0]
      } else {
        throw new Error('No keyring found for the requested account.')
      }
    })
  }

  // Display For Keyring
  // @Keyring keyring
  //
  // returns Promise( @Object { type:String, accounts:Array } )
  //
  // Is used for adding the current keyrings to the state object.
  displayForKeyring (keyring) {
    return keyring.getAccounts()
    .then((accounts) => {
      return {
        type: keyring.type,
        accounts: accounts,
      }
    })
  }

  // Add Gas Buffer
  // @string gas (as hexadecimal value)
  //
  // returns @string bufferedGas (as hexadecimal value)
  //
  // Adds a healthy buffer of gas to an initial gas estimate.
  addGasBuffer (gas) {
    const gasBuffer = new BN('100000', 10)
    const bnGas = new BN(ethUtil.stripHexPrefix(gas), 16)
    const correct = bnGas.add(gasBuffer)
    return ethUtil.addHexPrefix(correct.toString(16))
  }

  // Clear Keyrings
  //
  // Deallocates all currently managed keyrings and accounts.
  // Used before initializing a new vault.
  clearKeyrings () {
    let accounts
    try {
      accounts = Object.keys(this.ethStore.getState())
    } catch (e) {
      accounts = []
    }
    accounts.forEach((address) => {
      this.ethStore.removeAccount(address)
    })

    // clear keyrings from memory
    this.keyrings = []
    this.memStore.updateState({
      keyrings: [],
      identities: {},
    })
  }

  _updateMemStoreKeyrings() {
    Promise.all(this.keyrings.map(this.displayForKeyring))
    .then((keyrings) => {
      this.memStore.updateState({ keyrings })
    })
  }

}

module.exports = KeyringController