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
|
const EventEmitter = require('events').EventEmitter
const hdkey = require('ethereumjs-wallet/hdkey')
const bip39 = require('bip39')
const ethUtil = require('ethereumjs-util')
// *Internal Deps
const sigUtil = require('../lib/sig-util')
// Options:
const hdPathString = `m/44'/60'/0'/0`
const type = 'HD Key Tree'
class HdKeyring extends EventEmitter {
/* PUBLIC METHODS */
constructor (opts = {}) {
super()
this.type = type
this.deserialize(opts)
}
serialize () {
return Promise.resolve({
mnemonic: this.mnemonic,
numberOfAccounts: this.wallets.length,
})
}
deserialize (opts = {}) {
this.opts = opts || {}
this.wallets = []
this.mnemonic = null
this.root = null
if (opts.mnemonic) {
this._initFromMnemonic(opts.mnemonic)
}
if (opts.numberOfAccounts) {
return this.addAccounts(opts.numberOfAccounts)
}
return Promise.resolve([])
}
addAccounts (numberOfAccounts = 1) {
if (!this.root) {
this._initFromMnemonic(bip39.generateMnemonic())
}
const oldLen = this.wallets.length
const newWallets = []
for (let i = oldLen; i < numberOfAccounts + oldLen; i++) {
const child = this.root.deriveChild(i)
const wallet = child.getWallet()
newWallets.push(wallet)
this.wallets.push(wallet)
}
const hexWallets = newWallets.map(w => w.getAddress().toString('hex'))
return Promise.resolve(hexWallets)
}
getAccounts () {
return Promise.resolve(this.wallets.map(w => w.getAddress().toString('hex')))
}
// tx is an instance of the ethereumjs-transaction class.
signTransaction (address, tx) {
const wallet = this._getWalletForAccount(address)
var privKey = wallet.getPrivateKey()
tx.sign(privKey)
return Promise.resolve(tx)
}
// For eth_sign, we need to sign transactions:
// hd
signMessage (withAccount, data) {
const wallet = this._getWalletForAccount(withAccount)
const message = ethUtil.stripHexPrefix(data)
var privKey = wallet.getPrivateKey()
var msgSig = ethUtil.ecsign(new Buffer(message, 'hex'), privKey)
var rawMsgSig = ethUtil.bufferToHex(sigUtil.concatSig(msgSig.v, msgSig.r, msgSig.s))
return Promise.resolve(rawMsgSig)
}
// For eth_sign, we need to sign transactions:
newGethSignMessage (withAccount, msgHex) {
const wallet = this._getWalletForAccount(withAccount)
const privKey = wallet.getPrivateKey()
const msgBuffer = ethUtil.toBuffer(msgHex)
const msgHash = ethUtil.hashPersonalMessage(msgBuffer)
const msgSig = ethUtil.ecsign(msgHash, privKey)
const rawMsgSig = ethUtil.bufferToHex(sigUtil.concatSig(msgSig.v, msgSig.r, msgSig.s))
return Promise.resolve(rawMsgSig)
}
exportAccount (address) {
const wallet = this._getWalletForAccount(address)
return Promise.resolve(wallet.getPrivateKey().toString('hex'))
}
/* PRIVATE METHODS */
_initFromMnemonic (mnemonic) {
this.mnemonic = mnemonic
const seed = bip39.mnemonicToSeed(mnemonic)
this.hdWallet = hdkey.fromMasterSeed(seed)
this.root = this.hdWallet.derivePath(hdPathString)
}
_getWalletForAccount (account) {
const targetAddress = sigUtil.normalize(account)
return this.wallets.find((w) => {
const address = w.getAddress().toString('hex')
return ((address === targetAddress) ||
(sigUtil.normalize(address) === targetAddress))
})
}
}
HdKeyring.type = type
module.exports = HdKeyring
|
