-
Notifications
You must be signed in to change notification settings - Fork 2
/
hd-legacy-p2pkh-wallet.js
100 lines (82 loc) · 2.72 KB
/
hd-legacy-p2pkh-wallet.js
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
import { AbstractHDWallet } from './abstract-hd-wallet';
import bip39 from 'bip39';
import BigNumber from 'bignumber.js';
import signer from '../models/signer';
const bitcoin = require('bitcoinjs-lib');
const HDNode = require('bip32');
/**
* HD Wallet (BIP39).
* In particular, BIP44 (P2PKH legacy addressess)
* @see https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki
*/
export class HDLegacyP2PKHWallet extends AbstractHDWallet {
static type = 'HDlegacyP2PKH';
static typeReadable = 'HD Legacy (BIP44 P2PKH)';
allowSend() {
return true;
}
getXpub() {
if (this._xpub) {
return this._xpub; // cache hit
}
const mnemonic = this.secret;
const seed = bip39.mnemonicToSeed(mnemonic);
const root = bitcoin.bip32.fromSeed(seed);
const path = "m/44'/0'/0'";
const child = root.derivePath(path).neutered();
this._xpub = child.toBase58();
return this._xpub;
}
_getExternalWIFByIndex(index) {
return this._getWIFByIndex(false, index);
}
_getInternalWIFByIndex(index) {
return this._getWIFByIndex(true, index);
}
/**
* Get internal/external WIF by wallet index
* @param {Boolean} internal
* @param {Number} index
* @returns {*}
* @private
*/
_getWIFByIndex(internal, index) {
const mnemonic = this.secret;
const seed = bip39.mnemonicToSeed(mnemonic);
const root = HDNode.fromSeed(seed);
const path = `m/44'/0'/0'/${internal ? 1 : 0}/${index}`;
const child = root.derivePath(path);
return child.toWIF();
}
_getExternalAddressByIndex(index) {
index = index * 1; // cast to int
if (this.external_addresses_cache[index]) return this.external_addresses_cache[index]; // cache hit
const node = bitcoin.bip32.fromBase58(this.getXpub());
const address = bitcoin.payments.p2pkh({
pubkey: node.derive(0).derive(index).publicKey,
}).address;
return (this.external_addresses_cache[index] = address);
}
_getInternalAddressByIndex(index) {
index = index * 1; // cast to int
if (this.internal_addresses_cache[index]) return this.internal_addresses_cache[index]; // cache hit
const node = bitcoin.bip32.fromBase58(this.getXpub());
const address = bitcoin.payments.p2pkh({
pubkey: node.derive(1).derive(index).publicKey,
}).address;
return (this.internal_addresses_cache[index] = address);
}
createTx(utxos, amount, fee, address) {
for (let utxo of utxos) {
utxo.wif = this._getWifForAddress(utxo.address);
}
let amountPlusFee = parseFloat(new BigNumber(amount).plus(fee).toString(10));
return signer.createHDTransaction(
utxos,
address,
amountPlusFee,
fee,
this._getInternalAddressByIndex(this.next_free_change_address_index),
);
}
}