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SecNodeTracker.js
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SecNodeTracker.js
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const LocalStorage = require('node-localstorage').LocalStorage;
const local = new LocalStorage('./config');
const fs = require('fs');
const Client = require('bitcoin-core');
const Zcash = require('zcash');
let host = local.getItem('rpchost') || local.getItem('rpcbind');
if (!host) host = 'localhost';
const cfg = {
host: host,
port: local.getItem('rpcport'),
ssl: {
enabled: false
},
username: local.getItem('rpcuser'),
password: local.getItem('rpcpassword')
}
const errmsg = "Unable to connect to zend. Please check the zen rpc settings and ensure zend is running";
const os = process.platform;
const logtime = () => {
return (new Date()).toISOString().replace(/T/, ' ').replace(/\..+/, '') + " GMT" + " --";
}
class SecNode {
constructor(corerpc, zenrpc) {
this.corerpc = corerpc;
this.zenrpc = zenrpc;
this.statsInterval = 1000 * 60 * 6;
this.statsTimer = null;
this.statsLoop = () => {
this.collectStats();
};
this.configcount = 0;
this.chalStart = null;
this.chalRunning = false;
this.opTimer = null;
this.opTimerInterval = 1000 * 2;
this.amt = 0.0001;
this.fee = 0.0001;
this.minChalBal = .01;
this.defaultMemTime = 45;
this.memBefore = {};
this.memNearEnd = {};
this.waiting = false;
this.zenDownInterval = 1000 * 61;
this.zenDownTimer = null;
this.zenDownLoop = () => {
this.getPrimaryAddress((err, amt) => {
if (err) {
console.error(logtime(), err);
} else {
console.log(logtime(), 'Zen connected.');
clearInterval(this.zenDownTimer);
this.collectStats();
}
});
};
}
static auto() {
let corerpc = new Client(cfg);
let zenrpc = new Zcash(cfg);
return new SecNode(corerpc, zenrpc);
}
initialize() {
this.statsTimer = setInterval(this.statsLoop, this.statsInterval);
}
getPrimaryAddress(cb) {
const self = this;
this.corerpc.getAddressesByAccount("", (err, data) => {
if (err) {
self.waiting = true;
if (err.code == -28) {
console.log(logtime(), "Zend: " + err.message);
return cb('Waiting on zend');
} else {
console.log(logtime(), "Zend error: " + err.message);
return cb(errmsg);
}
}
self.waiting = false;
return cb(null, data[0]);
});
}
getAddrWithBal(cb) {
const self = this;
let lastChalBlockNum = local.getItem('lastChalBlock');
self.corerpc.getInfo()
.then((data) => {
let valid = true;
if (lastChalBlockNum && data.blocks - parseInt(lastChalBlockNum) < 5) valid = false;
return valid;
})
.then((valid) => {
this.zenrpc.z_listaddresses()
.then((results) => {
if (results.length == 0) {
console.log("No private address found. Please create one using 'zen_cli z_getnewaddress' and send at least 1 ZEN for challenges split into 4 or more transactions");
return cb(null)
}
let called = false;
let addrbal;
let count = 0;
for (let i = 0; i < results.length; i++) {
const addr = results[i];
self.zenrpc.z_getbalance(addr)
.then((bal) => {
return { addr, bal }
})
.then((addrbal) => {
count++;
if (addrbal.bal > .001 && !called) {
called = true;
cb(null, { "addr": addrbal.addr, "bal": addrbal.bal, "valid": valid, "lastChalBlock": lastChalBlockNum });
}
if (count === results.length && !called) {
cb(null, { "addr": addrbal.addr, "bal": addrbal.bal, "valid": valid, "lastChalBlock": lastChalBlockNum });
}
});
}
});
});
}
execChallenge(chal) {
var self = this;
console.log(logtime(), "Start challenge. " + chal.crid);
if (self.chalRunning) {
let resp = { "crid": chal.crid, "status": "error", "error": "Previous challenge still running. " + self.crid }
resp.ident = self.ident;
self.socket.emit("chalresp", resp)
console.log(logtime(), "Challenge " + self.crid + " is currently running. Failed " + chal.crid)
return
}
if (os == 'linux') self.memBefore = self.getProcMeminfo(false);
self.crid = chal.crid
self.corerpc.getBlockHash(chal.blocknum, (err, hash) => {
if (err) {
let resp = { "crid": chal.crid, "status": "failed", "error": "unable to get blockhash from zen" }
self.chalRunning = false;
resp.ident = self.ident;
self.socket.emit("chalresp", resp);
console.error(logtime(), `Challenge Error: unable to get blockhash for challenge id ${chal.crid} block ${chal.blocknum}`);
if (!self.zenDownTimer) self.zenDownTimer = setInterval(self.zenDownLoop, self.zenDownInterval);
return
}
if (self.zenDownTimer) clearInterval(self.zenDownTimer);
self.corerpc.getBlock(hash, (err, block) => {
let msgBuff = new Buffer.from(block.merkleroot);
let amts = [{ "address": chal.sendto, "amount": self.amt, "memo": msgBuff.toString('hex') }];
self.getAddrWithBal((err, result) => {
if (err) return console.error(err);
let zaddr = result.addr;
if (result.bal == 0) {
console.log(logtime(), "Challenge private address balance is 0 at the moment. Cannot perform challenge");
}
console.log('Using ' + zaddr + ' for challenge. bal=' + result.bal)
if (zaddr && result.bal > 0) {
self.zenrpc.z_sendmany(zaddr, amts, 1, self.fee)
.then(opid => {
console.log("OperationId=" + opid);
self.chalStart = new Date();
self.chalRunning = true;
self.opTimer = setInterval(() => {
self.checkOp(opid, chal);
}
, self.opTimerInterval);
return
})
.catch(err => {
let resp = { "crid": chal.crid, "status": "error", "error": err }
resp.ident = self.ident;
console.error(logtime(), "Challenge: unable to create and send transaction.");
console.error(err);
self.socket.emit("chalresp", resp)
}
);
} else {
let resp = { "crid": chal.crid, "status": "error", "error": "no available balance found or 0" }
resp.ident = self.ident;
console.log("challenge: unable to find address with balance or balance 0.");
self.socket.emit("chalresp", resp)
}
});
});
})
}
checkOp(opid, chal) {
let self = this;
if (!self.chalRunning) {
console.log(logtime(), "Clearing timer");
clearInterval(self.opTimer);
return;
}
self.zenrpc.z_getoperationstatus([opid])
.then(operation => {
let elapsed = (((new Date()) - self.chalStart) / 1000).toFixed(0);
if (operation.length == 0) {
if (elapsed < 12) return
// if here then operation lost or unavailable.
self.chalRunning = false;
let resp = { "crid": chal.crid, "status": "failed", "error": "No operation found." }
resp.ident = self.ident;
self.socket.emit("chalresp", resp);
console.log(logtime(), "Challenge submit: failed. Could not find zen operation.");
console.log(logtime(), "Clearing timer");
clearInterval(self.opTimer);
return;
}
let op = operation[0];
if (elapsed % 10 === 0) console.log(logtime(), "Elapsed challenge time=" + elapsed + " status=" + op.status);
if (op.status == "success") {
console.log(logtime(), "Challenge submit: " + op.status);
let resp = {
"crid": chal.crid,
"status": op.status,
"txid": op.result.txid,
"execSeconds": op.execution_secs,
"created": op.creation_time
}
if (os == 'linux') {
resp.memBefore = self.memBefore,
resp.memNearEnd = self.memNearEnd
}
console.log(logtime(), `Challenge result:${op.status} seconds:${op.execution_secs}`);
resp.ident = self.ident;
self.chalRunning = false;
self.socket.emit("chalresp", resp);
local.setItem('lastExecSec', (op.execution_secs).toFixed(2));
self.getBlockHeight(true);
//clear the operation from queue
self.zenrpc.z_getoperationresult([opid]);
} else if (op.status == "failed") {
console.log(logtime(), `Challenge result:${op.status}`)
console.log(op.error.message);
let resp = { "crid": chal.crid, "status": op.status, "error": op.error.message }
self.chalRunning = false;
resp.ident = self.ident;
self.socket.emit("chalresp", resp);
//clear the operation from queue
self.zenrpc.z_getoperationresult([opid]);
} else if (os == 'linux' && op.status == "executing") {
let last = local.getItem('lastExecSec') || self.defaultMemTime;
if (last - elapsed < 12) {
self.memNearEnd = self.getProcMeminfo(false)
}
}
return
})
.catch(err => {
self.chalRunning = false;
console.error("challenge error");
console.error(err);
clearInterval(self.opTimer);
return
});
}
getConfig(req, trkver, hw) {
// node version, trkver, and hw
const self = this;
this.corerpc.getInfo()
.then((data) => {
let node = {
"version": data.version,
"protocolversion": data.protocolversion,
"wallet.version": data.walletversion
}
if (!self.ident.nid && req.nid) self.ident.nid = req.nid;
let config = { node: node, trkver: trkver, hw: hw }
self.socket.emit("node", { type: "config", ident: self.ident, config: config });
})
.catch(err => {
console.error("Get config ", err);
}
);
}
collectStats() {
const self = this;
if (!self.socket.connected || self.waiting) return;
if (!self.ident.nid) {
console.log(logtime(), 'Unable to collect stats without a nodeid.');
return;
}
self.getStats((err, stats) => {
if (err) {
console.error(logtime(), "Stat check failed. " + err);
if (self.ident) {
self.socket.emit("node", { type: "down", ident: self.ident });
}
if (!self.zenDownTimer) self.zenDownTimer = setInterval(self.zenDownLoop, self.zenDownInterval);
} else {
if (self.zenDownTimer) clearInterval(self.zenDownTimer);
self.getTLSPeers((err, tlsPeers) => {
if (err) console.log(logtime(), "Unable to get peers from zen. " + err);
stats.tlsPeers = tlsPeers;
self.socket.emit("node", { type: "stats", stats: stats, ident: self.ident });
let display = "";
for (let s in stats) {
if (s !== 'tlsPeers') display += `${s}:${stats[s]} `;
}
console.log(logtime(), `Stat check: connected to:${self.ident.con.cur} ${display}`);
});
}
})
}
getStats(cb) {
var self = this;
if (self.waiting) return cb("Waiting for zend");
this.corerpc.getInfo()
.then((data) => {
self.zenrpc.z_getoperationstatus()
.then(ops => {
let count = 0;
for (let op of ops) {
op.status == 'queued' ? count++ : null;
}
self.getAddrWithBal((err, addrBal) => {
if (err) return cb(err)
let stats = {
"blocks": data.blocks,
"peers": data.connections,
"bal": addrBal.bal,
"isValidBal": addrBal.valid,
"queueDepth": count,
"lastChalBlock": addrBal.lastChalBlock,
"lastExecSec": local.getItem('lastExecSec')
}
if (addrBal.bal < self.minChalBal && addrBal.valid) console.log(logtime(), "Low challenge balance. " + addrBal.bal)
if (self.ident) {
return cb(null, stats);
} else {
return cb('ident not set');
}
})
})
})
.catch(err => {
let msg = err.cause ? err.cause : err.message;
console.error(logtime(), 'Stat check: unable to access zen.');
return cb(err);
});
}
getNetworks(req, cb) {
const self = this;
this.corerpc.getNetworkInfo()
.then((data) => {
let nets = data.localaddresses;
if (req) {
if (!self.ident.nid && req.nid) self.ident.nid = req.nid;
self.socket.emit("node", { type: "networks", ident: self.ident, nets });
} else {
cb(null, nets)
}
})
.catch(err => {
console.error(logtime(), 'get networks ' + err);
}
);
}
getTLSPeers(cb) {
const self = this;
this.corerpc.getPeerInfo()
.then((data) => {
let peers = [];
for (let i = 0; i < data.length; i++) {
let p = data[i];
if (p.inbound == false) {
let ip = p.addr.indexOf(']') != -1 ? p.addr.substr(1, p.addr.indexOf(']') - 1) : p.addr.substr(0, p.addr.indexOf(":"));
let peer = { ip, tls: p.tls_verified };
peers.push(peer);
}
}
cb(null, peers)
})
.catch(err => {
console.error(logtime(), 'Zen - can not get peers');
cb(err)
}
);
}
getBlockHeight(setLast) {
const self = this;
this.corerpc.getInfo()
.then((data) => {
if (setLast) local.setItem('lastChalBlock', data.blocks);
return data.blocks;
})
.catch(err => {
let msg = err.cause ? err.cause : err;
console.log(logtime(), "getBlockHeight " + msg);
return
});
}
getProcMeminfo(display, cb) {
if (cb && typeof cb === 'function') {
return fs.readFile('/proc/meminfo', (err, meminfo) => {
if (err) {
return cb(err);
}
return cb(null, _formatProcMeminfo(meminfo, display));
});
}
let meminfo = fs.readFileSync('/proc/meminfo');
return _formatProcMeminfo(meminfo, display);
}
}
const _formatProcMeminfo = (meminfo, display) => {
let lines = meminfo.toString().split('\n');
let disp = "";
let data = {};
let toGb = 1000 * 1024;
lines.forEach((line) => {
let row = line.split(':');
let item = row[0]
if (item == 'MemTotal' ||
item == 'MemFree' ||
item == 'MemAvailable' ||
item == 'SwapTotal' ||
item == 'SwapFree') {
let num = parseInt(row[1].trim().split(' ')[0]);
if (display) {
disp += item + ": " + (num / toGb).toFixed(2) + "GB ";
} else {
data[item] = (num / toGb).toFixed(2) + "GB"
}
}
});
if (display) return disp;
return data;
};
module.exports = SecNode;