mirror of
https://github.com/BlueWallet/BlueWallet.git
synced 2024-11-20 10:12:01 +01:00
369 lines
11 KiB
JavaScript
369 lines
11 KiB
JavaScript
import { LegacyWallet } from './legacy-wallet';
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import Frisbee from 'frisbee';
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import { WatchOnlyWallet } from './watch-only-wallet';
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const bip39 = require('bip39');
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export class AbstractHDWallet extends LegacyWallet {
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constructor() {
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super();
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this.type = 'abstract';
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this.next_free_address_index = 0;
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this.next_free_change_address_index = 0;
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this.internal_addresses_cache = {}; // index => address
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this.external_addresses_cache = {}; // index => address
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this._xpub = ''; // cache
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this.usedAddresses = [];
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this._address_to_wif_cache = {};
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}
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generate() {
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throw new Error('Not implemented');
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}
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allowSend() {
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return false;
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}
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getTransactions() {
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// need to reformat txs, as we are expected to return them in blockcypher format,
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// but they are from blockchain.info actually (for all hd wallets)
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let txs = [];
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for (let tx of this.transactions) {
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txs.push(AbstractHDWallet.convertTx(tx));
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}
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return txs;
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}
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static convertTx(tx) {
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// console.log('converting', tx);
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var clone = Object.assign({}, tx);
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clone.received = new Date(clone.time * 1000).toISOString();
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clone.outputs = clone.out;
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if (clone.confirmations === undefined) {
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clone.confirmations = 0;
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}
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for (let o of clone.outputs) {
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o.addresses = [o.addr];
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}
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for (let i of clone.inputs) {
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if (i.prev_out && i.prev_out.addr) {
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i.addresses = [i.prev_out.addr];
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}
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}
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if (!clone.value) {
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let value = 0;
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for (let inp of clone.inputs) {
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if (inp.prev_out && inp.prev_out.xpub) {
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// our owned
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value -= inp.prev_out.value;
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}
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}
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for (let out of clone.out) {
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if (out.xpub) {
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// to us
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value += out.value;
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}
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}
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clone.value = value;
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}
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return clone;
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}
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setSecret(newSecret) {
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this.secret = newSecret.trim().toLowerCase();
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this.secret = this.secret.replace(/[^a-zA-Z0-9]/g, ' ').replace(/\s+/g, ' ');
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return this;
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}
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/**
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* @return {Boolean} is mnemonic in `this.secret` valid
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*/
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validateMnemonic() {
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return bip39.validateMnemonic(this.secret);
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}
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getMnemonicToSeedHex() {
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return bip39.mnemonicToSeedHex(this.secret);
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}
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getTypeReadable() {
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throw new Error('Not implemented');
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}
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/**
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* Derives from hierarchy, returns next free address
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* (the one that has no transactions). Looks for several,
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* gives up if none found, and returns the used one
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*
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* @return {Promise.<string>}
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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 = 0; c < Math.max(5, this.usedAddresses.length); c++) {
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if (this.next_free_address_index + c < 0) continue;
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let address = this._getExternalAddressByIndex(this.next_free_address_index + c);
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this.external_addresses_cache[this.next_free_address_index + c] = address; // updating cache just for any case
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let WatchWallet = new WatchOnlyWallet();
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WatchWallet.setSecret(address);
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await WatchWallet.fetchTransactions();
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if (WatchWallet.transactions.length === 0) {
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// found free address
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freeAddress = WatchWallet.getAddress();
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this.next_free_address_index += c; // now points to _this one_
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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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* Derives from hierarchy, returns next free CHANGE address
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* (the one that has no transactions). Looks for several,
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* gives up if none found, and returns the used one
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*
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* @return {Promise.<string>}
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*/
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async getChangeAddressAsync() {
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// looking for free internal address
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let freeAddress = '';
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let c;
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for (c = 0; c < Math.max(5, this.usedAddresses.length); c++) {
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if (this.next_free_change_address_index + c < 0) continue;
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let address = this._getInternalAddressByIndex(this.next_free_change_address_index + c);
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this.internal_addresses_cache[this.next_free_change_address_index + c] = address; // updating cache just for any case
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let WatchWallet = new WatchOnlyWallet();
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WatchWallet.setSecret(address);
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await WatchWallet.fetchTransactions();
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if (WatchWallet.transactions.length === 0) {
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// found free address
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freeAddress = WatchWallet.getAddress();
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this.next_free_change_address_index += c; // now points to _this one_
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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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* Should not be used in HD wallets
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*
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* @deprecated
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* @return {string}
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*/
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getAddress() {
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return '';
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}
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_getExternalWIFByIndex(index) {
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throw new Error('Not implemented');
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}
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_getInternalWIFByIndex(index) {
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throw new Error('Not implemented');
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}
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_getExternalAddressByIndex(index) {
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throw new Error('Not implemented');
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}
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_getInternalAddressByIndex(index) {
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throw new Error('Not implemented');
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}
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getXpub() {
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throw new Error('Not implemented');
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}
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/**
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* @inheritDoc
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*/
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async fetchBalance() {
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try {
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const api = new Frisbee({ baseURI: 'https://blockchain.info' });
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let response = await api.get('/balance?active=' + this.getXpub());
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if (response && response.body) {
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for (let xpub of Object.keys(response.body)) {
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this.balance = response.body[xpub].final_balance / 100000000;
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}
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this._lastBalanceFetch = +new Date();
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} else {
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throw new Error('Could not fetch balance from API: ' + response.err);
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}
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} catch (err) {
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console.warn(err);
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}
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}
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/**
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* Async function to fetch all transactions. Use getter to get actual txs.
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* Also, sets internals:
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* `this.internal_addresses_cache`
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* `this.external_addresses_cache`
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*
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* @returns {Promise<void>}
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*/
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async fetchTransactions() {
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try {
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const api = new Frisbee({ baseURI: 'https://blockchain.info' });
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this.transactions = [];
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let offset = 0;
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while (1) {
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let response = await api.get('/multiaddr?active=' + this.getXpub() + '&n=100&offset=' + offset);
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if (response && response.body) {
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if (response.body.txs && response.body.txs.length === 0) {
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break;
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}
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let latestBlock = false;
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if (response.body.info && response.body.info.latest_block) {
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latestBlock = response.body.info.latest_block.height;
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}
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this._lastTxFetch = +new Date();
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// processing TXs and adding to internal memory
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if (response.body.txs) {
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for (let tx of response.body.txs) {
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let value = 0;
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for (let input of tx.inputs) {
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// ----- INPUTS
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if (input.prev_out.xpub) {
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// sent FROM US
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value -= input.prev_out.value;
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// setting internal caches to help ourselves in future...
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let path = input.prev_out.xpub.path.split('/');
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if (path[path.length - 2] === '1') {
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// change address
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this.next_free_change_address_index = Math.max(path[path.length - 1] * 1 + 1, this.next_free_change_address_index);
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// setting to point to last maximum known change address + 1
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}
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if (path[path.length - 2] === '0') {
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// main (aka external) address
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this.next_free_address_index = Math.max(path[path.length - 1] * 1 + 1, this.next_free_address_index);
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// setting to point to last maximum known main address + 1
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}
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// done with cache
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}
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}
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for (let output of tx.out) {
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// ----- OUTPUTS
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if (output.xpub) {
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// sent TO US (change)
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value += output.value;
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// setting internal caches to help ourselves in future...
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let path = output.xpub.path.split('/');
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if (path[path.length - 2] === '1') {
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// change address
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this.next_free_change_address_index = Math.max(path[path.length - 1] * 1 + 1, this.next_free_change_address_index);
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// setting to point to last maximum known change address + 1
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}
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if (path[path.length - 2] === '0') {
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// main (aka external) address
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this.next_free_address_index = Math.max(path[path.length - 1] * 1 + 1, this.next_free_address_index);
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// setting to point to last maximum known main address + 1
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}
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// done with cache
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}
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}
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tx.value = value; // new BigNumber(value).div(100000000).toString() * 1;
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if (!tx.confirmations && latestBlock) {
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tx.confirmations = latestBlock - tx.block_height;
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}
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this.transactions.push(tx);
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}
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if (response.body.txs.length < 100) {
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// this fetch yilded less than page size, thus requesting next batch makes no sense
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break;
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}
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} else {
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break; // error ?
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}
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} else {
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throw new Error('Could not fetch transactions from API: ' + response.err); // breaks here
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}
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offset += 100;
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}
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} catch (err) {
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console.warn(err);
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}
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}
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/**
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* Given that `address` is in our HD hierarchy, try to find
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* corresponding WIF
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*
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* @param address {String} In our HD hierarchy
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* @return {String} WIF if found
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*/
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_getWifForAddress(address) {
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if (this._address_to_wif_cache[address]) return this._address_to_wif_cache[address]; // cache hit
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// fast approach, first lets iterate over all addressess we have in cache
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for (let index of Object.keys(this.internal_addresses_cache)) {
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if (this._getInternalAddressByIndex(index) === address) {
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return (this._address_to_wif_cache[address] = this._getInternalWIFByIndex(index));
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}
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}
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for (let index of Object.keys(this.external_addresses_cache)) {
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if (this._getExternalAddressByIndex(index) === address) {
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return (this._address_to_wif_cache[address] = this._getExternalWIFByIndex(index));
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}
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}
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// no luck - lets iterate over all addressess we have up to first unused address index
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for (let c = 0; c <= this.next_free_change_address_index + 3; c++) {
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let possibleAddress = this._getInternalAddressByIndex(c);
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if (possibleAddress === address) {
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return (this._address_to_wif_cache[address] = this._getInternalWIFByIndex(c));
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}
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}
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for (let c = 0; c <= this.next_free_address_index + 3; c++) {
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let possibleAddress = this._getExternalAddressByIndex(c);
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if (possibleAddress === address) {
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return (this._address_to_wif_cache[address] = this._getExternalWIFByIndex(c));
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}
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}
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throw new Error('Could not find WIF for ' + address);
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}
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createTx() {
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throw new Error('Not implemented');
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}
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}
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