106 lines
2.1 KiB
JavaScript
106 lines
2.1 KiB
JavaScript
/*!
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* client.js - http client for wallets
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* Copyright (c) 2014-2015, Fedor Indutny (MIT License)
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* Copyright (c) 2014-2017, Christopher Jeffrey (MIT License).
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* https://github.com/bcoin-org/bcoin
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*/
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'use strict';
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const assert = require('assert');
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const {NodeClient} = require('bclient');
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const TX = require('../primitives/tx');
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const digest = require('bcrypto/lib/digest');
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const util = require('../utils/util');
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class WalletClient extends NodeClient {
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constructor(options) {
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super(options);
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}
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async open() {
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await super.open();
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this.listen('block connect', (entry, txs) => {
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this.emit('block connect', ...parseBlock(entry, txs));
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});
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this.listen('block disconnect', (entry) => {
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this.emit('block disconnect', parseEntry(entry));
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});
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this.listen('block rescan', (entry, txs) => {
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this.emit('block rescan', ...parseBlock(entry, txs));
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});
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this.listen('chain reset', (tip) => {
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this.emit('chain reset', parseEntry(tip));
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});
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this.listen('tx', (tx) => {
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this.emit('tx', TX.fromRaw(tx));
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});
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}
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async getTip() {
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return parseEntry(await super.getTip());
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}
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async getEntry(block) {
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if (typeof block === 'string')
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block = util.revHex(block);
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return parseEntry(await super.getEntry(block));
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}
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async send(tx) {
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return super.send(tx.toRaw());
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}
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async setFilter(filter) {
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return super.setFilter(filter.toRaw());
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}
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async rescan(start) {
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if (typeof start === 'string')
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start = util.revHex(start);
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return super.rescan(start);
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}
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}
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/*
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* Helpers
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*/
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function parseEntry(data) {
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assert(Buffer.isBuffer(data));
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assert(data.length >= 84);
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const h = digest.hash256(data.slice(0, 80));
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return {
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hash: h.toString('hex'),
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height: data.readUInt32LE(80, true),
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time: data.readUInt32LE(68, true)
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};
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}
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function parseBlock(entry, txs) {
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const block = parseEntry(entry);
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const out = [];
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for (const raw of txs) {
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const tx = TX.fromRaw(raw);
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out.push(tx);
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}
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return [block, out];
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}
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/*
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* Expose
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*/
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module.exports = WalletClient;
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