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78 lines
1.9 KiB
78 lines
1.9 KiB
6 years ago
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/*!
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* pushtx/pushtx-processor.js
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* Copyright © 2019 – Katana Cryptographic Ltd. All Rights Reserved.
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*/
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'use strict'
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const bitcoin = require('bitcoinjs-lib')
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const zmq = require('zeromq')
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const Logger = require('../lib/logger')
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const errors = require('../lib/errors')
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const RpcClient = require('../lib/bitcoind-rpc/rpc-client')
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const network = require('../lib/bitcoin/network')
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const keys = require('../keys')[network.key]
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const status = require('./status')
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/**
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* A singleton providing a wrapper
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* for pushing transactions with the local bitcoind
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*/
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class PushTxProcessor {
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/**
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* Constructor
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*/
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constructor() {
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this.notifSock = null
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// Initialize the rpc client
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this.rpcClient = new RpcClient()
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}
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/**
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* Initialize the sockets for notifications
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*/
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initNotifications(config) {
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// Notification socket for the tracker
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this.notifSock = zmq.socket('pub')
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this.notifSock.bindSync(config.uriSocket)
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}
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/**
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* Push transactions to the Bitcoin network
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* @param {string} rawtx - raw bitcoin transaction in hex format
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* @returns {string} returns the txid of the transaction
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*/
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async pushTx(rawtx) {
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let value = 0
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// Attempt to parse incoming TX hex as a bitcoin Transaction
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try {
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const tx = bitcoin.Transaction.fromHex(rawtx)
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for (let output of tx.outs)
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value += output.value
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Logger.info('Push for ' + (value / 1e8).toFixed(8) + ' BTC')
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} catch(e) {
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throw errors.tx.PARSE
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}
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// At this point, the raw hex parses as a legitimate transaction.
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// Attempt to send via RPC to the bitcoind instance
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try {
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const txid = await this.rpcClient.sendrawtransaction(rawtx)
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Logger.info('Pushed!')
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// Update the stats
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status.updateStats(value)
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// Notify the tracker
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this.notifSock.send(['pushtx', rawtx])
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return txid
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} catch(err) {
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Logger.info('Push failed')
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throw err
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}
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}
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}
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module.exports = new PushTxProcessor()
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