aboutsummaryrefslogtreecommitdiffstats
path: root/app/scripts/lib/tx-state-manager.js
blob: 4493889bf881f55c339eb19dc0e3bfecce6b3bf6 (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
const extend = require('xtend')
const EventEmitter = require('events')
const ObservableStore = require('obs-store')
const ethUtil = require('ethereumjs-util')
const txStateHistoryHelper = require('./tx-state-history-helper')

module.exports = class TransactionStateManger extends EventEmitter {
  constructor ({ initState, txHistoryLimit, getNetwork }) {
    super()

    this.store = new ObservableStore(
      extend({
        transactions: [],
    }, initState))
    this.txHistoryLimit = txHistoryLimit
    this.getNetwork = getNetwork
  }

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

  getTxList () {
    const network = this.getNetwork()
    const fullTxList = this.getFullTxList()
    return fullTxList.filter((txMeta) => txMeta.metamaskNetworkId === network)
  }

  getFullTxList () {
    return this.store.getState().transactions
  }

  // Returns the tx list
  getUnapprovedTxList () {
    const txList = this.getTxsByMetaData('status', 'unapproved')
    return txList.reduce((result, tx) => {
      result[tx.id] = tx
      return result
    }, {})
  }

  getPendingTransactions (address) {
    const opts = { status: 'submitted' }
    if (address) opts.from = address
    return this.getFilteredTxList(opts)
  }

  addTx (txMeta) {
    this.once(`${txMeta.id}:signed`, function (txId) {
      this.removeAllListeners(`${txMeta.id}:rejected`)
    })
    this.once(`${txMeta.id}:rejected`, function (txId) {
      this.removeAllListeners(`${txMeta.id}:signed`)
    })
    // initialize history
    txMeta.history = []
    // capture initial snapshot of txMeta for history
    const snapshot = txStateHistoryHelper.snapshotFromTxMeta(txMeta)
    txMeta.history.push(snapshot)

    const transactions = this.getFullTxList()
    const txCount = this.getTxCount()
    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 = transactions.findIndex((metaTx) => metaTx.status === 'confirmed' || metaTx.status === 'rejected')
      transactions.splice(index, 1)
    }
    transactions.push(txMeta)
    this._saveTxList(transactions)
    return txMeta
  }
  // gets tx by Id and returns it
  getTx (txId) {
    const txMeta = this.getTxsByMetaData('id', txId)[0]
    return txMeta
  }

  updateTx (txMeta) {
    if (txMeta.txParams) {
      Object.keys(txMeta.txParams).forEach((key) => {
        let value = txMeta.txParams[key]
        if (typeof value !== 'string') console.error(`${key}: ${value} in txParams is not a string`)
        if (!ethUtil.isHexPrefixed(value)) console.error('is not hex prefixed, anything on txParams must be hex prefixed')
      })
    }

    // create txMeta snapshot for history
    const currentState = txStateHistoryHelper.snapshotFromTxMeta(txMeta)
    // recover previous tx state obj
    const previousState = txStateHistoryHelper.replayHistory(txMeta.history)
    // generate history entry and add to history
    const entry = txStateHistoryHelper.generateHistoryEntry(previousState, currentState)
    txMeta.history.push(entry)

    // commit txMeta to state
    const txId = txMeta.id
    const txList = this.getFullTxList()
    const index = txList.findIndex(txData => txData.id === txId)
    txList[index] = txMeta
    this._saveTxList(txList)
  }


  // 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)
  }

/*
  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, initialList) {
    let filteredTxList = initialList
    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
  // statuses:
  //    - `'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.

  // 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, err) {
    const txMeta = this.getTx(txId)
    txMeta.err = {
      message: err.toString(),
      stack: err.stack,
    }
    this.updateTx(txMeta)
    this._setTxStatus(txId, 'failed')
  }

//
//           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)
    this.emit(`tx:status-update`, txId, status)
    if (status === 'submitted' || status === 'rejected') {
      this.emit(`${txMeta.id}:finished`, txMeta)
    }
    this.updateTx(txMeta)
    this.emit('update:badge')
  }

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