You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
84 lines
2.2 KiB
84 lines
2.2 KiB
/*!
|
|
* accounts/notification-web-sockets.js
|
|
* Copyright © 2019 – Katana Cryptographic Ltd. All Rights Reserved.
|
|
*/
|
|
'use strict'
|
|
|
|
const _ = require('lodash')
|
|
const zmq = require('zeromq/v5-compat')
|
|
const WebSocket = require('websocket')
|
|
const Logger = require('../lib/logger')
|
|
const network = require('../lib/bitcoin/network')
|
|
const keys = require('../keys')[network.key]
|
|
const status = require('./status')
|
|
const NotificationsService = require('./notifications-service')
|
|
|
|
|
|
/**
|
|
* A singleton providing a notifications server over web sockets
|
|
*/
|
|
class NotificationsServer {
|
|
|
|
/**
|
|
* Constructor
|
|
*/
|
|
constructor() {
|
|
// Http server
|
|
this.httpServer = null
|
|
// Notifications service
|
|
this.notifService = null
|
|
}
|
|
|
|
/**
|
|
* Attach the web sockets server to the listening web server
|
|
* @param {pushtx.HttpServer} httpServer - HTTP server
|
|
*/
|
|
attach(httpServer) {
|
|
this.httpServer = httpServer
|
|
|
|
if (this.notifService !== null) return
|
|
|
|
this.notifService = new NotificationsService(httpServer.server)
|
|
|
|
// Initialize the zmq socket for communications
|
|
// with the tracker
|
|
this._initTrackerSocket()
|
|
}
|
|
|
|
|
|
/**
|
|
* Initialize a zmq socket for notifications from the tracker
|
|
*/
|
|
_initTrackerSocket() {
|
|
this.sock = zmq.socket('sub')
|
|
this.sock.connect(`tcp://127.0.0.1:${keys.ports.tracker}`)
|
|
this.sock.subscribe('block')
|
|
this.sock.subscribe('transaction')
|
|
|
|
this.sock.on('message', (topic, message) => {
|
|
switch(topic.toString()) {
|
|
case 'block':
|
|
try {
|
|
const header = JSON.parse(message.toString())
|
|
this.notifService.notifyBlock(header)
|
|
} catch(e) {
|
|
Logger.error(e, 'API : NotificationServer._initTrackerSocket() : Error in block message')
|
|
}
|
|
break
|
|
case 'transaction':
|
|
try {
|
|
const tx = JSON.parse(message.toString())
|
|
this.notifService.notifyTransaction(tx)
|
|
} catch(e) {
|
|
Logger.error(e, 'API : NotificationServer._initTrackerSocket() : Error in transaction message')
|
|
}
|
|
break
|
|
default:
|
|
Logger.info(`API : Unknown ZMQ message topic: "${topic}"`)
|
|
}
|
|
})
|
|
}
|
|
|
|
}
|
|
|
|
module.exports = new NotificationsServer()
|
|
|