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app_old_rabbitmq.js
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/*
This is a program for an elite, narrow group of several Epic Box operators in the world.
If you are not one of them, reading this code is pointless.
*/
// Rabbitmq driver
const amqplib = require( 'amqplib/callback_api')
// Html server used for websockets server
const {createServer} = require("http")
// Used for execute rust module which fast check addreses and verify signatures
const { execFile } = require('node:child_process')
// Mogodb driver for externally store messageid and slates for ver 2.0.0. of epicbox, tp work with answer by wallet with slate id message
// const { MongoClient } = require('mongodb');
// For generate uid message id for Slate sending to wallet.
const uid = require('uid2')
// Websocket for communicate with other epicboxes, and Websocket Server for receive all ws connections from wallets
const { WebSocket, WebSocketServer } = require('ws')
var challenge = "7WUDtkSaKyGRUnQ22rE3QUXChV8DmA6NnunDYP4vheTpc"
// change to your epicbox domaina
const epicbox_domain = "epicbox.fastepic.eu"
const epicbox_port = 443
// change to your port - standard is 3423 - remeber to open locale firewall - in linux sudo ufw 3424 allow
// you can run many instance of this epicbox - simpel copy folder with other name and change this port to next which you want
// remeber to correct set nginx to switch between different instances of epic box - read more in my git about it.
const localepicboxserviceport = 3424
// where is your RabbitMq ... all instances of epicboxes which works udner your domain must use the same RabbitMq
// so if you have this epicbox on other computer then RabbitMq change to correct ip and remeber to set firewall to open correct ports for RabiitMq
const rabbitmqaddress = 'amqp://localhost';
// interval for check in intervals if new Slates are for connected wallets ( it is not the same what interval in wallets ! )
var interval = null
// for RabbitMq connection
var rabbitconn = null
//
// Path to rust executable app. All epicbox instances can use the same path if has access to it.
// must be compiled like descibed in Readme.md
//
const pathtoepicboxlib = "./epicboxlib/target/release/epicboxlib"
// html webpage displayed when you open domain in webbrowser. Information about other main epicbox servers.
// this webpage can be rather small in size
const html = "<!DOCTYPE html>\n\
<html>\n\
<head>\n\
<title>Epicbox</title>\n\
<style>a:link {\n\
color: orange;\n\
} a:visited {\n\
color: orange;\n\
}</style>\n\
</head>\n\
<body style='background-color: #242222; color: lightgray; margin-left: 20px;''>\n\
\n\
<h1>Epicbox servers.</h1>\n\
<p>Asia, Australia - epicbox.hyperbig.com</p>\n\
<p>North America, South America - epicbox.epic.tech</p>\n\
<p>US East Cost - epicbox.epicnet.us</p>\n\
<p>Africa, Europe - epicbox.fastepic.eu</p>\n\
<br>\n\
<p>More about Epic</p>\n\
<a href='https://epic.tech'>Epic Cash main webpage</a>\n\
<br>\n\
<br>\n\
Example use in toml file.\n\
\n\
<pre>\n\
<code>\n\
\n\
[epicbox]\n\
epicbox_domain = 'epicbox.fastepic.eu'\n\
epicbox_port = 443\n\
epicbox_protocol_unsecure = false\n\
epicbox_address_index = 0\n\
epicbox_listener_interval = 10\n\
\n\
</code>\n\
</pre>\n\
\n\
</body>\n\
</html>"
const requestListener = function (req, res) {
res.writeHead(200)
res.end(html);
}
//
// HTTMl server creation with function for receives requests
// Used by WebSocketServer
//
const server = createServer(requestListener);
// uncommented WebSocket creation with option for zip messages
/*
const wss = new WebSocketServer({
//port: 3425,
server:server,
perMessageDeflate: {
zlibDeflateOptions: {
// See zlib defaults.
chunkSize: 1024,
memLevel: 7,
level: 3
},
zlibInflateOptions: {
chunkSize: 10 * 1024
},
// Other options settable:
clientNoContextTakeover: true, // Defaults to negotiated value.
serverNoContextTakeover: true, // Defaults to negotiated value.
serverMaxWindowBits: 10, // Defaults to negotiated value.
// Below options specified as default values.
concurrencyLimit: 10, // Limits zlib concurrency for perf.
threshold: 1024 // Size (in bytes) below which messages
// should not be compressed if context takeover is disabled.
}
})*/
//WebSocket creation using HTTML server
const wss = new WebSocketServer({
server:server,
})
// function pon connectione - run when wallets connect by webscoket to epicbox
wss.on('connection', function connection(ws, req) {
ws.epicboxver = null;
ws.iphere = null;
// it is taken from nginx
if(req.headers['x-forwarded-for']) ws.iphere = req.headers['x-forwarded-for'].split(',')[0].trim();
const ip2 = req.socket.remoteAddress;
console.log(`[${new Date().toLocaleTimeString()}] Connection from ip `, ws.iphere, " nginx/firewall ", ip2)
ws.queueforsubscribe = null
ws.on('close', (code, reason)=>{
try{
if(ws.queueforsubscribe!=null) {
console.log("Socket close for ", ws.queueforsubscribe)
ws.queueforsubscribe = null;
ws.channelforsubscribe.close((err)=>{
if(err!=null) console.error(err)
ws.channelforsubscribe = null;
})
}
console.log( `[${new Date().toLocaleTimeString()}] Close by code: `, code, " and reason ", reason.toString())
} catch(err){
console.error(err)
}
})
ws.on('error', (errws) =>{
console.error(errws)
try{
if(ws.queueforsubscribe!=null) {
ws.queueforsubscribe = null;
ws.channelforsubscribe,close((errorch)=>{
console.error(errorch)
ws.channelforsubscribe = null;
});
}
} catch(err){
console.error(err)
}
});
//
// Standard method send by wallets or by epicboxes to epicbox
// one Made is added for receive accept from wallets ( epicbox 2.0.0 suggestion )
//
ws.on('message', function message(data) {
// console.log('received: %s', data)
try{
if(data.toString()=="ping") { ws.send("pong"); /*console.log("ping");*/ return; }
if(data.toString()=="pong") {ws.send("ping"); /*console.log("pong");*/return;}
let json=JSON.parse(data)
if(json.type=="Challenge") {
console.log(json)
console.log('[%s][%s] -> [%s] send return [%s]', new Date().toLocaleTimeString(), ws.iphere, "Challenge", challenge)
ws,send(JSON.stringify({"type": "Challenge","str": challenge}))
} else if(json.type=="Subscribe") {
console.log(json)
console.log('[%s][%s] -> [%s]', new Date().toLocaleTimeString(), ws.iphere, "Subscribe")
subscribe(ws, json)
} else if(json.type=="Unsubscribe") {
console.log(json)
console.log('[%s][%s] -> [%s]', new Date().toLocaleTimeString(), ws.iphere, "Unsubscribe")
unsubscribe(ws, json)
} else if(json.type=="PostSlate"){
console.log('[%s][%s] -> [%s]', new Date().toLocaleTimeString(), ws.iphere, "PostSlate")
postslate(ws, json)
} else if(json.type=="Made"){
console.log('[%s][%s] -> [%s]', new Date().toLocaleTimeString(), ws.iphere, "Made")
made(ws, json)
} else console.log('received: %s', data);
} catch(err){
}
});
// here we send Challenge to wallet or other epicbox when connected
let jsonhello = {"type":"Challenge","str":challenge}
ws.send(JSON.stringify(jsonhello));
});
//
// Subscribe function run when wallet send Subscribe message
//
async function subscribe(ws, json){
console.log("subscribe ", json.address)
try{
// check if wallet wants use ver 2.0.0
if(json.hasOwnProperty("ver") && json.ver=="2.0.0") ws.epicboxver = "2.0.0";
// start check using externally rust program for verify signature send from wallet
const child = execFile(pathtoepicboxlib, ["verifysignature", json.address , challenge, json.signature], (error, stdout, stderr) => {
if (error) {
throw error;
}
var isTrueSet = (stdout === 'true');
// if sugnature is OK
if(isTrueSet) {
// here we store address of wallet which is queue in RabbitMq
ws.queueforsubscribe = json.address
// open Channel in RabbitMq and assert Queue for wallet address to check if new Slates waiting for it
rabbitconn.createChannel((err1, ch2) => {
if (err1) throw err1;
ch2.assertQueue(json.address,{expires:86400000 });
ws.send(JSON.stringify({type:"Ok"}))
try {
// read the first SLate from RabbitMq and send to wallet using Slate message
if(json.address!=null) ch2.get(json.address, {noAck:false}, (err, msgrabbit)=>{
if(msgrabbit!=false && err==null) {
console.log("try send for ", json.address)
let fromrabbit = JSON.parse(msgrabbit.content.toString("utf8"))
let answer= {}
answer.type="Slate"
answer.from = msgrabbit.properties.headers["epicbox-reply-to"]
answer.str = fromrabbit.str
answer.signature = fromrabbit.signature
answer.challenge = fromrabbit.challenge
//answer.challenge = "testchallenge"
//let answerstr = JSON.stringify(answer)
let answerstr = null
let binar = null
// chekc if wallet use 2.0.0 - if use write messageid in externally mongdb for accept when wallet answer by Made message on ws
if(json.hasOwnProperty("ver") && json.ver=="2.0.0" && msgrabbit.properties.hasOwnProperty("messageId")){
let messageid = msgrabbit.properties.messageId
answer.epicboxmsgid = messageid
answer.ver = json.ver
answerstr = JSON.stringify(answer)
//binar = Buffer.from(answerstr, 'latin1');
//ws.send(binar, { binary: true })
ws.send(answerstr)
} else {
// standard answer fro ver 1.0.0 of epicbox
answerstr = JSON.stringify(answer)
//console.log(answer)
//binar = Buffer.from(answerstr, 'latin1');
//ws.send(binar, { binary: true })
ws.send(answerstr)
ch2.ack(msgrabbit)
}
} else {
// console.log("msgrabbit ", msgrabbit)
//console.log("Error ", err)
}
});
// store in ws channel and rabbitmq queue for later close and destroy when wallet send Unsubscribe message
ws.channelforsubscribe = ch2
ws.queueforsubscribe = json.address
} catch(err){
console.log(err)
}
})
} else {
console.log("Signature error")
ws.send(JSON.stringify({type:"Error", kind:"signature error", description:"Signature error"}))
}
});
} catch(err){
console.log(err)
ws.send(JSON.stringify({type:"Error", kind:"signature error", description:"Signature error"}))
}
}
//
// run when wallet sent Unsuscribe Message
//
async function unsubscribe(ws, json){
try{
// fast send Ok message to wallet, because unsubscribe rather always without error
ws.send(JSON.stringify({type:"Ok"}))
} catch(e) {
console.log(e)
}
try{
console.log("unsubscibe ", ws.queueforsubscribe)
if(ws.queueforsubscribe!=null) {
if(ws.queueforsubscribe!=json.address) {
console.log("Different subcribed and unsubscribe address ????")
}
ws.queueforsubscribe = null;
ws.channelforsubscribe.close((err)=>{
if(err!=null) console.error(err)
ws.channelforsubscribe = null;
})
console.log("Unsubscribe ", json.address)
} else {
try {
// ws.send(JSON.stringify({type:"Error", kind:"Unsubscribe error", description:"unsubscibe too fast send"}));
} catch(err){
console.log("Problem to send to ws")
}
}
} catch(errr){
console.error(errr)
}
}
//
// Run when wallet or other epicbox want send to epicbox Slate
// it can send to other epicbox when to address domain is differnet when our epicbox domain
//
async function postslate(ws, json){
try {
console.log("postslate from ", json.from, "to ", json.to)
let from = json.from.split('@')
from = from[0]
// use externally rust program to verify addresses - it is the same which is used to verify signatures
const childadd = execFile(pathtoepicboxlib, ['verifyaddress', json.from, json.to], (erroradr, stdoutadr, stderradr) => {
if(erroradr){
throw erroradr
}
var isTrueSetadr = (stdoutadr === 'true');
if(isTrueSetadr) {
// use rust program to verify signatures
const child = execFile(pathtoepicboxlib, ["verifysignature", from , json.str, json.signature], (error, stdout, stderr) => {
if (error) {
throw error;
}
var isTrueSet = (stdout === 'true');
if(isTrueSet) {
preparePostSlate(ws, json, "")
} else {
// check again signatures --- why ? it is rather never used, but it is in orginal rust code.
const child2 = execFile(pathtoepicboxlib, ["verifysignature", from , challenge, json.signature], (error, stdout, stderr) => {
var isTrueSet2 = (stdout === 'true');
if(isTrueSet2){
preparePostSlate(ws, json, challenge);
} else {
ws.send(JSON.stringify({type:"Error", kind:"postslate error", description:"PostSlate error"}))
}
})
}
})
} else {
ws.send(JSON.stringify({type:"Error", kind:"postslate error", description:"PostSlate Addresses error"}))
}
})
} catch(err){
console.error("postslate ", err)
ws.send(JSON.stringify({type:"Error", kind:"postslate error", description:"PostSlate error"}))
}
}
//
// run only for wallets used ver 2.0.0
// for standard wallets never used
// it say by message Made that slate was received and correct made in wallet
// then epicbox can remove Slate from RabbotMq and message id from mongodb
//
function made(ws, json){
if(json.hasOwnProperty("epicboxmsgid") && ws.epicboxver=="2.0.0" && json.hasOwnProperty("ver") && json.ver=="2.0.0"){
// check signature by externally rust app
const child = execFile(pathtoepicboxlib, ["verifysignature", json.address , challenge, json.signature], (error, stdout, stderr) => {
if (error) {
throw error;
}
var isTrueSet = (stdout === 'true');
if(isTrueSet) {
rabbitconn.createChannel((err1, ch2) => {
if (err1) throw err1;
ch2.assertQueue(json.address,{expires:86400000 });
let made = false;
// read all messages from RabbitMq to find this one which could be ack ( removed from queue)
do{
ch2.get(json.address, {noAck:false}, (err, msgrabbit)=>{
if(msgrabbit) {
if(msgrabbit.properties.messageId == json.epicboxmsgid) {
ch2.ack(msgrabbit)
made = true;
console.log("message ack ", json.epicboxmsgid)
}
} else {
made = true
}
})
} while(made==true);
})
ws.send(JSON.stringify({type:"Ok"}))
} else {
ws.send(JSON.stringify({type:"Error", kind:"signature error", description:"Signature error"}))
}
})
} else {
ws.send(JSON.stringify({type:"Error", kind:"incorrect request", description:"Dont know this function without correct version"}))
}
}
//
// run from postslate or forpostpostslat
// prepare received Slate for store in RabbitMq or send to other epicbox if domain of to address is different from this epicbox domain
//
function preparePostSlate(ws, json, chall){
let str = JSON.parse(json.str)
let addressto= {}
addressto.publicKey = str.destination.public_key
addressto.domain = str.destination.domain
addressto.port = str.destination.port
if(addressto.port==null ) addressto.port = 443; else addressto.port = Number(addressto.port);
if(addressto.domain==epicbox_domain && addressto.port ===epicbox_port){
let signed_payload = {str: json.str, challenge: chall, signature: json.signature}
signed_payload = JSON.stringify(signed_payload)
rabbitconn.createChannel(function(error1, cha1) {
if (error1) {
throw error1;
}
cha1.assertQueue(addressto.publicKey, {durable:true, expires:86400000})
let buf = Buffer.from(signed_payload)
let epicboxreplyto = json.from
// here stored slate in RabbitMq - here is added messageId which is used in ver. 2.0.0
let result = cha1.sendToQueue(addressto.publicKey, buf, { headers:{durable:true, 'epicbox-reply-to': epicboxreplyto, 'x-expires': 86400000, 'content-length':buf.length}, expiration:86400000, messageId:uid(32)});
if(result) {
console.log("wrote to rabbit" );
ws.send(JSON.stringify({type:"Ok"}));
} else ws.send(JSON.stringify({type:"Error", kind:"Slate send error", description:"Slate problem"}));
})
} else {
// connect by wss to other epicbox
// when received Challange send by Message PostSlate Slate received from wallet.
//
//
sock = new WebSocket("wss://"+addressto.domain+":"+addressto.port)
sock.on('error', console.error)
sock.on('open', ()=>{console.log("Connect "+addressto.domain+":"+addressto.port)})
sock.on('message',(mes)=>{
try{
ames = JSON.parse(mes)
if(ames.type=="Challenge") {
let reqqq = {type:"PostSlate", from:json.from, to:json.to, str:json.str, signature:json.signature}
sock.send(JSON.stringify(reqqq))
console.log("Send to wss://"+addressto.domain+":"+addressto.port)
}
if(ames.type=="Ok") {
console.log("Sent correct to wss://"+addressto.domain+":"+addressto.port)
ws.send(JSON.stringify({type:"Ok"}));
}
} catch(ee){
console.error(ee)
ws.send(JSON.stringify({type:"Error", kind:"Slate send error remote server", description:"Slate problem remote server"}));
}
})
}
}
//
// function warking in interval repeted in 3 sec. after finish loop
// it check all connected websockets to epicbox and if they are in Subscribe mode check if new Slate are waitng for it
// if new slate is ... when send it.
// check if wallet use 2.0.0 version
//
function forInterval(){
clearInterval(interval)
wss.clients.forEach(function each(client) {
if (client.readyState === 1 && client.queueforsubscribe!=null) {
try {
//console.log("try check and send ", client.queueforsubscribe)
client.channelforsubscribe.get(client.queueforsubscribe, {noAck:false}, (err, msgrabbit)=>{
if(msgrabbit!=false && err==null) {
console.log("try send ", client.queueforsubscribe)
let fromrabbit = JSON.parse(msgrabbit.content.toString("utf8"))
let answer= {}
answer.type="Slate"
answer.from = msgrabbit.properties.headers["epicbox-reply-to"]
answer.str = fromrabbit.str
answer.signature = fromrabbit.signature
answer.challenge = fromrabbit.challenge
let answerstr = null
if(client.epicboxver == "2.0.0" && msgrabbit.properties.hasOwnProperty("messageId")){
let messageid = msgrabbit.properties.messageId
answer.epicboxmsgid = messageid
answer.ver = json.ver
answerstr = JSON.stringify(answer)
client.send(answerstr)
} else {
answerstr = JSON.stringify(answer)
client.send(answerstr)
client.channelforsubscribe.ack(msgrabbit)
}
} else {
// console.log("msgrabbit ", msgrabbit)
//console.log("Error ", err)
}
})
} catch(err){
console.log(err)
}
}
});
interval = setInterval( forInterval, 3000);
}
//
// main starting function
//
async function main() {
amqplib.connect(rabbitmqaddress, (err, conn) => {
if (err) throw err;
rabbitconn = conn
server.listen(localepicboxserviceport)
interval = setInterval( forInterval, 5000);
})
return "Epicbox ready to work.";
}
main()
.then(console.log)
.catch(console.error)
// That's all
// It is one day created software and seven days finding bugs :)))
// If you has suggestion or something is starnge for you simple ask me on keybase or telegram
// Thank you for reading. Sorry my English.