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82 lines
2.4 KiB
82 lines
2.4 KiB
import { AbstractHDElectrumWallet } from './abstract-hd-electrum-wallet';
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import bip39 from 'bip39';
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const bip32 = require('bip32');
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const bitcoinjs = require('bitcoinjs-lib');
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/**
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* HD Wallet (BIP39).
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* In particular, Breadwallet-compatible (Legacy addresses)
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*/
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export class HDLegacyBreadwalletWallet extends AbstractHDElectrumWallet {
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static type = 'HDLegacyBreadwallet';
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static typeReadable = 'HD Legacy Breadwallet (P2PKH)';
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/**
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* @see https://github.com/bitcoinjs/bitcoinjs-lib/issues/584
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* @see https://github.com/bitcoinjs/bitcoinjs-lib/issues/914
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* @see https://github.com/bitcoinjs/bitcoinjs-lib/issues/997
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*/
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getXpub() {
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if (this._xpub) {
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return this._xpub; // cache hit
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}
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const mnemonic = this.secret;
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const seed = bip39.mnemonicToSeed(mnemonic);
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const root = bip32.fromSeed(seed);
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const path = "m/0'";
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const child = root.derivePath(path).neutered();
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this._xpub = child.toBase58();
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return this._xpub;
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}
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_getExternalAddressByIndex(index) {
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index = index * 1; // cast to int
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if (this.external_addresses_cache[index]) return this.external_addresses_cache[index]; // cache hit
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const node = bitcoinjs.bip32.fromBase58(this.getXpub());
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const address = bitcoinjs.payments.p2pkh({
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pubkey: node.derive(0).derive(index).publicKey,
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}).address;
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return (this.external_addresses_cache[index] = address);
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}
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_getInternalAddressByIndex(index) {
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index = index * 1; // cast to int
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if (this.internal_addresses_cache[index]) return this.internal_addresses_cache[index]; // cache hit
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const node = bitcoinjs.bip32.fromBase58(this.getXpub());
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const address = bitcoinjs.payments.p2pkh({
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pubkey: node.derive(1).derive(index).publicKey,
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}).address;
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return (this.internal_addresses_cache[index] = address);
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}
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_getExternalWIFByIndex(index) {
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return this._getWIFByIndex(false, index);
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}
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_getInternalWIFByIndex(index) {
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return this._getWIFByIndex(true, index);
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}
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/**
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* Get internal/external WIF by wallet index
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* @param {Boolean} internal
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* @param {Number} index
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* @returns {*}
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* @private
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*/
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_getWIFByIndex(internal, index) {
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const mnemonic = this.secret;
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const seed = bip39.mnemonicToSeed(mnemonic);
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const root = bitcoinjs.bip32.fromSeed(seed);
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const path = `m/0'/${internal ? 1 : 0}/${index}`;
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const child = root.derivePath(path);
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return child.keyPair.toWIF();
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}
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}
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