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104 lines
3.0 KiB
104 lines
3.0 KiB
import { LegacyWallet, HDSegwitP2SHWallet } from './';
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const bitcoin = require('bitcoinjs-lib');
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const bip39 = require('bip39');
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/**
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* HD Wallet (BIP39).
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* In particular, BIP44 (P2PKH legacy addressess)
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* @see https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki
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*/
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export class HDLegacyP2PKHWallet extends HDSegwitP2SHWallet {
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constructor() {
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super();
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this.type = 'HDlegacyP2PKH';
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}
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getTypeReadable() {
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return 'HD Legacy (BIP44 P2PKH)';
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}
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getXpub() {
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let mnemonic = this.secret;
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let seed = bip39.mnemonicToSeed(mnemonic);
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let root = bitcoin.HDNode.fromSeedBuffer(seed);
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let path = "m/44'/0'/0'";
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let child = root.derivePath(path).neutered();
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return child.toBase58();
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}
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_getExternalWIFByIndex(index) {
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index = index * 1; // cast to int
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let mnemonic = this.secret;
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let seed = bip39.mnemonicToSeed(mnemonic);
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let root = bitcoin.HDNode.fromSeedBuffer(seed);
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let path = "m/44'/0'/0'/0/" + index;
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let child = root.derivePath(path);
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return child.keyPair.toWIF();
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}
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_getInternalWIFByIndex(index) {
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index = index * 1; // cast to int
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let mnemonic = this.secret;
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let seed = bip39.mnemonicToSeed(mnemonic);
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let root = bitcoin.HDNode.fromSeedBuffer(seed);
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let path = "m/44'/0'/0'/1/" + index;
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let child = root.derivePath(path);
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return child.keyPair.toWIF();
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}
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_getExternalAddressByIndex(index) {
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index = index * 1; // cast to int
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let mnemonic = this.secret;
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let seed = bip39.mnemonicToSeed(mnemonic);
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let root = bitcoin.HDNode.fromSeedBuffer(seed);
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let path = "m/44'/0'/0'/0/" + index;
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let child = root.derivePath(path);
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let w = new LegacyWallet();
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w.setSecret(child.keyPair.toWIF());
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return w.getAddress();
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}
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_getInternalAddressByIndex(index) {
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index = index * 1; // cast to int
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let mnemonic = this.secret;
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let seed = bip39.mnemonicToSeed(mnemonic);
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let root = bitcoin.HDNode.fromSeedBuffer(seed);
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let path = "m/44'/0'/0'/1/" + index;
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let child = root.derivePath(path);
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let w = new LegacyWallet();
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w.setSecret(child.keyPair.toWIF());
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return w.getAddress();
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}
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/**
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* @inheritDoc
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*/
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async getAddressAsync() {
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// looking for free external address
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let freeAddress = '';
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let c;
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for (c = -1; c < 5; c++) {
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let Legacy = new LegacyWallet();
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Legacy.setSecret(this._getExternalWIFByIndex(this.next_free_address_index + c));
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await Legacy.fetchTransactions();
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if (Legacy.transactions.length === 0) {
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// found free address
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freeAddress = Legacy.getAddress();
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this.next_free_address_index += c + 1; // now points to the one _after_
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break;
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}
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}
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if (!freeAddress) {
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// could not find in cycle above, give up
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freeAddress = this._getExternalAddressByIndex(this.next_free_address_index + c); // we didnt check this one, maybe its free
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this.next_free_address_index += c + 1; // now points to the one _after_
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}
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return freeAddress;
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}
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}
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