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evernode_monitor.js
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evernode_monitor.js
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const { XrplClient } = require('xrpl-client')
const lib = require('xrpl-accountlib');
const { exit } = require('process');
const fs = require('fs')
const { createTransport } = require('nodemailer');
const path = require('path');
const { ALPN_ENABLED } = require('constants');
const { Console } = require('console');
require('dotenv').config({ path: path.resolve(__dirname, '.env') })
const verboseLog = process.env.verboseLog == "true";
const consoleLog = (msg) => {
console.log(new Date().toISOString() + " " + msg)
}
const logVerbose = (msg) => {
if (verboseLog) {
consoleLog(msg)
}
}
logVerbose("Original account string = " + process.env.accounts);
logVerbose("accounts length after split = " + process.env.accounts.split('\n').length);
const accounts = process.env.accounts.split('\n');
var reputationAccounts = [];
if (process.env.reputationAccounts != null)
reputationAccounts = process.env.reputationAccounts.split('\n');
const evrDestinationAccount = process.env.evrDestinationAccount;
const evrDestinationAccountTag = process.env.evrDestinationAccountTag;
const xahSourceAccount = process.env.xahSourceAccount;
var secret = "";
var keypair;
if (process.env.secret) {
secret = process.env.secret;
lib.derive.familySeed(secret);
keypair = lib.derive.familySeed(secret)
}
const run_evr_withdrawal = process.env.run_evr_withdrawal == "true";
const run_xah_balance_monitor = process.env.run_xah_balance_monitor == "true";
const run_heartbeat_monitor = process.env.run_heartbeat_monitor == "true";
const xahaud = process.env.xahaud;
const client = new XrplClient(xahaud);
const minutes_from_last_heartbeat_alert_threshold = process.env.minutes_from_last_heartbeat_alert_threshold;
const alert_repeat_interval_in_minutes = process.env.alert_repeat_interval_in_minutes;
const xah_balance_threshold = process.env.xah_balance_threshold * 1000000;
const evr_balance_threshold = process.env.evr_balance_threshold * 1;
const minimum_evr_transfer = process.env.minimum_evr_transfer * 1;
const refill_amount = process.env.refill_amount * 1000000;
const evr_refill_amount = process.env.evr_refill_amount * 1;
const smtpKey = process.env.smtpKey;
const smtpEmail = process.env.smtpEmail;
const destinationEmail = process.env.destinationEmail || process.env.smtpEmail;
const transporter = createTransport({
host: "smtp-relay.sendinblue.com",
port: 587,
auth: {
user: smtpEmail,
pass: smtpKey,
},
});
const heartbeatAccount = process.env.heartbeatAccount;
const myDate = new Date().toUTCString();
const monitor_balance = async () => {
consoleLog("Monitoring the account XAH balance...");
var sourceAccountId = accounts[0];
var sourceAccount = null;
var sequence = 0;
var allAccounts = accounts.concat(reputationAccounts);
logVerbose("accounts = " + allAccounts.length);
for (const account of allAccounts) {
if (account) {
const { account_data } = await client.send({ command: "account_info", account: account });
var sourceData = await client.send({ command: "account_info", account: xahSourceAccount });
var sequence = sourceData.account_data.Sequence;
if (account != xahSourceAccount) {
logVerbose("Balance for account " + account + " is " + account_data.Balance);
if (parseInt(account_data.Balance) < xah_balance_threshold) {
const filePath = path.resolve(__dirname, 'balanceLow-' + account + '.txt');
consoleLog("Account balance for " + account + " is " + account_data.Balance + ", sending funds");
consoleLog("Source account balance = " + sourceData.account_data.Balance);
if (sourceData.account_data.Balance < xah_balance_threshold) {
consoleLog("Not enough funds in first account to fill other accounts");
if (!fs.existsSync(filePath)) {
await sendMail("Insufficient funds", "We tried to send XAH to " + account + " but the balance in " + xahSourceAccount + " is too low.\r\n\r\nPlease feed your source account.");
fs.writeFileSync(filePath, "Balance is too low");
}
}
else {
const tx = {
TransactionType: 'Payment',
Account: xahSourceAccount, //Destination account is use to fillEvernode accounts
Amount: (refill_amount).toString(),
//Destination: 'rYourWalletYouControl'
Destination: account_data.Account, //the account that has to be filled
DestinationTag: "", //*** set to YOUR exchange wallet TAG Note: no quotes << do not forget to set TAG
Fee: '12', //12 drops aka 0.000012 XAH, Note: Fee is XAH NOT EVR
NetworkID: '21337', //XAHAU Production ID
Sequence: sequence
}
const { signedTransaction } = lib.sign(tx, keypair)
consoleLog("sending the transaction " + JSON.stringify(tx));
//SUBmit sign TX to ledger
const submit = await client.send({ command: 'submit', 'tx_blob': signedTransaction })
consoleLog(submit.engine_result, submit.engine_result_message, submit.tx_json.hash);
if (fs.existsSync(filePath)) fs.rmSync(filePath);
sequence++;
}
}
}
}
}
for (const account of reputationAccounts) {
if (account) {
const { account_data } = await client.send({ command: "account_info", account: account });
var sourceData = await client.send({ command: "account_info", account: xahSourceAccount });
var sequence = sourceData.account_data.Sequence;
if (account != xahSourceAccount) {
var balance = await GetEvrBalance(account);
var sourceBalance = await GetEvrBalance(xahSourceAccount);
logVerbose("EVR Balance for account " + account + " is " + balance);
logVerbose("EVR Balance for source account " + xahSourceAccount + " is " + sourceBalance);
if (parseInt(balance) < evr_balance_threshold) {
const filePath = path.resolve(__dirname, 'balanceLow-' + account + '.txt');
consoleLog("Account EVR balance for " + account + " is " + balance + ", sending funds");
if (sourceBalance < evr_refill_amount) {
consoleLog("Not enough funds in first account to fill other accounts with EVR");
logVerbose("sourceBalance in EVR " + sourceBalance);
logVerbose("evr_refill_amount = " + evr_refill_amount);
if (!fs.existsSync(filePath)) {
await sendMail("Insufficient EVR funds", "We tried to send EVR to " + account + " but the balance in " + xahSourceAccount + " is too low.\r\n\r\nPlease feed your source account.");
fs.writeFileSync(filePath, "EVR Balance is too low");
}
}
else {
const tx = {
TransactionType: 'Payment',
Account: xahSourceAccount, //Destination account is use to fillEvernode accounts
Amount: {
"currency": "EVR",
"value": evr_refill_amount, //*** Change to balance (no quotes) or use "0.01" for testing low payment
"issuer": "rEvernodee8dJLaFsujS6q1EiXvZYmHXr8" //DO NOT CHANGE - this is the EVR Trustline Issuer address
},
Destination: account, //the account that has to be filled
DestinationTag: "", //*** set to YOUR exchange wallet TAG Note: no quotes << do not forget to set TAG
Fee: '12', //12 drops aka 0.000012 XAH, Note: Fee is XAH NOT EVR
NetworkID: '21337', //XAHAU Production ID
Sequence: sequence
}
const { signedTransaction } = lib.sign(tx, keypair)
consoleLog("sending the EVR transaction " + JSON.stringify(tx));
//SUBmit sign TX to ledger
const submit = await client.send({ command: 'submit', 'tx_blob': signedTransaction })
consoleLog(submit.engine_result, submit.engine_result_message, submit.tx_json.hash);
if (fs.existsSync(filePath)) fs.rmSync(filePath);
sequence++;
}
}
}
}
}
}
async function GetEvrBalance(account) {
logVerbose("getting the EVR balance for " + account);
let marker = ''
const l = []
var balance = 0
while (typeof marker === 'string') {
const lines = await client.send({ command: 'account_lines', account, marker: marker === '' ? undefined : marker })
marker = lines?.marker === marker ? null : lines?.marker
//consoleLog(`Got ${lines.lines.length} results`)
lines.lines.forEach(t => {
if (t.currency == "EVR") {
logVerbose(JSON.stringify(t))
balance = balance + t.balance
logVerbose("EVR balance for account " + account + " increased by " + t.balance);
}
})
}
return balance;
}
const transfer_funds = async () => {
consoleLog("Starting the funds transfer batch...");
for (const account of accounts) {
if (account != "") {
logVerbose("start the transferring process on account " + account);
if (account != evrDestinationAccount) {
logVerbose("getting account data on account " + account);
const { account_data } = await client.send({ command: "account_info", account })
let marker = ''
const l = []
var balance = 0
while (typeof marker === 'string') {
const lines = await client.send({ command: 'account_lines', account, marker: marker === '' ? undefined : marker })
marker = lines?.marker === marker ? null : lines?.marker
//consoleLog(`Got ${lines.lines.length} results`)
lines.lines.forEach(t => {
if (t.currency == "EVR") {
logVerbose(JSON.stringify(t))
balance = balance + t.balance
}
})
}
//check just the EVRs balance is > 0 if not go to start of for loop with continue
if (balance <= minimum_evr_transfer) {
logVerbose('# EVR Balance is below the minumum required to send the funds for account ' + account);
continue;
}
//Destination Adress and TAG set in.env file
const tag = process.env.tag;
//send all funds to your chosen Exchange, Xaman or other Xahau account
logVerbose("Balance = " + balance + ", preparing the payment transaction on account " + account);
const tx = {
TransactionType: 'Payment',
Account: account,
Amount: {
"currency": "EVR",
"value": balance, //*** Change to balance (no quotes) or use "0.01" for testing low payment
"issuer": "rEvernodee8dJLaFsujS6q1EiXvZYmHXr8" //DO NOT CHANGE - this is the EVR Trustline Issuer address
},
//Destination: 'rYourWalletYouControl'
Destination: evrDestinationAccount, //your exchnage or xaman wallet address
DestinationTag: evrDestinationAccountTag, //*** set to YOUR exchange wallet TAG Note: no quotes << do not forget to set TAG
Fee: '12', //12 drops aka 0.000012 XAH, Note: Fee is XAH NOT EVR
NetworkID: '21337', //XAHAU Production ID
Sequence: account_data.Sequence
}
logVerbose("signing the transaction on account " + account);
const { signedTransaction } = lib.sign(tx, keypair)
logVerbose(JSON.stringify(tx))
//SUBmit sign TX to ledger
consoleLog("sending the EVR payment transaction on account " + account);
const submit = await client.send({ command: 'submit', 'tx_blob': signedTransaction })
consoleLog("Payment sent, result = " + submit.engine_result);
} //end of for loop
}
}
}
const monitor_heartbeat = async () => {
consoleLog("Checking account heartbeat...");
var accountIndex = 1;
for (const account of accounts) {
logVerbose("checking account heartbeat on account " + account);
await checkAccountHeartBeat(account, accountIndex);
accountIndex++;
}
}
function getMinutesBetweenDates(startDate, endDate) {
const diff = endDate - startDate;
return (diff / 60000);
}
async function checkAccountHeartBeat(account, accountIndex) {
var ledgerIndex = -1;
const filePath = path.resolve(__dirname, account + '.txt');
var accountFailed = fs.existsSync(filePath);
var date_failure = new Date();
if (accountFailed) {
date_failure = new Date(Date.parse(fs.readFileSync(filePath, 'utf8')));
logVerbose("account " + account + " is in status failed since " + date_failure);
const diffMinutes = getMinutesBetweenDates(date_failure, new Date());
logVerbose("diffMinutes = " + diffMinutes);
logVerbose("alert_repeat_interval_in_minutes = " + alert_repeat_interval_in_minutes);
if (alert_repeat_interval_in_minutes > 0 && diffMinutes > alert_repeat_interval_in_minutes) {
accountFailed = false;
}
}
while (true) {
let marker = '';
const l = [];
while (typeof marker === 'string') {
logVerbose("getting last 5 transactions on account " + account + " with last ledger " + ledgerIndex);
const response = await client.send({
"id": 2,
"command": "account_tx",
"account": account,
"ledger_index_min": -1,
"ledger_index_max": ledgerIndex,
"binary": false,
"limit": 5,
"forward": false, marker: marker === '' ? undefined : marker
})
marker = response?.marker === marker ? null : response?.marker
// It gets the last 5 transactions and looks for the last heartbeat
var i = 0;
for (var tIndex = 0; tIndex < response.transactions.length; tIndex++) {
var transaction = response.transactions[tIndex];
ledgerIndex = transaction.tx.ledger_index - 1;
logVerbose(JSON.stringify(transaction.tx));
logVerbose(tIndex + " " + 2 + " new ledgerIndex = " + ledgerIndex);
var utcMilliseconds = 1000 * (transaction.tx.date + 946684800);
var transactionDate = new Date(0); // The 0 there is the key, which sets the date to the epoch
var date = new Date();
var now_utc = Date.UTC(date.getUTCFullYear(), date.getUTCMonth(),
date.getUTCDate(), date.getUTCHours(),
date.getUTCMinutes(), date.getUTCSeconds());
if (now_utc - utcMilliseconds > 1000 * 60 * minutes_from_last_heartbeat_alert_threshold) {
consoleLog("Handling failure for too old heartbeat transaction, account failed = " + accountFailed);
await handleFailure(account, accountFailed, filePath, accountIndex);
return;
}
if (transaction.tx.Destination == heartbeatAccount) {
//consoleLog("System running regularly " + account + "");
if (fs.existsSync(filePath)) {
await sendSuccess(account, accountIndex);
fs.rmSync(filePath);
}
return;
}
}
if (response.transactions.length < 5) {
consoleLog("Handling failure for no heartbeat transactions, account failed = " + accountFailed);
await handleFailure(account, accountFailed, filePath);
return;
}
}
}
}
async function handleFailure(account, accountFailed, filePath, accountIndex) {
if (!accountFailed) {
await sendFailure(account, accountIndex);
fs.writeFileSync(filePath, new Date().toString())
}
consoleLog("ALERT, SYSTEM STOPPED " + account);
}
async function sendFailure(account, accountIndex) {
var subject = "Failure in Evernode heartbeat " + accountIndex.toString();
var text = "Failure in retrieving Evernode heartbeat for account " + account + " (" + accountIndex.toString() + ")";
await sendMail(subject, text);
}
async function sendSuccess(account, accountIndex) {
var subject = "Evernode heartbeat restored " + accountIndex.toString();
var text = "Evernode heartbeat restored in account " + account + " (" + accountIndex.toString() + ")";
await sendMail(subject, text);
}
async function sendMail(subject, text) {
var mailOptions = {
from: smtpEmail,
to: destinationEmail,
subject: subject,
text: text
};
consoleLog("SENDING MAIL " + JSON.stringify(mailOptions));
if (!smtpEmail) {
consoleLog("smtp email not set in .env file. Email is not sent");
return;
}
await transporter.sendMail(mailOptions, function (error, info) {
if (error) {
consoleLog(error);
} else {
consoleLog('Email sent: ' + info.response);
}
});
}
function validate() {
if (!accounts || accounts.length == 0 || accounts[0] == "") {
consoleLog("no accounts set in .env file.");
return false;
}
if (!secret && (run_evr_withdrawal || run_xah_balance_monitor)) {
consoleLog("secret not set in .env file.");
return false;
}
return true;
}
const main = async () => {
var valid = validate();
if (valid) {
if (run_evr_withdrawal) { await transfer_funds() };
if (run_heartbeat_monitor) await monitor_heartbeat();
if (run_xah_balance_monitor) await monitor_balance();
}
client.close();
consoleLog('Shutting down...');
// Workaround so all queued emails are sent.
// I had to explicitly call the exit() function as the application was not stopping
// in case of Xahaud request failure, I don't know why.
setTimeout(function () {
exit();
}, 10000);
};
main()