Track BSC node sync status

checkSync.js

//checks if local noded is sync then sends SMS message using Twillio
document.title = "Sync Watcher"
const Web3 = require("web3")
const net = require('net');

const state = {
    messageSent: false,
    watcherInterval: null,
    lastSyncStatus: null,
    previousStatuses: [0, 0, 0],
    lastOutOfSyncTime: null,
    outOfSyncGaps: []
}
const accountSid = 'xxxxxxxxxxxxxxxxx';
const authToken = 'yyyyyyyyyyyyyyyyyyyy';
const client = require('twilio')(accountSid, authToken);

//will send message only once, so you can take action and resync or rest the watcher by setting state.messageSent to false
async function sendMessage(message) {
    if (state.messageSent) return

    console.log(`Sending message ${new Date().toISOString()} `, message)
    let response = await client.messages
        .create({
            body: message,
            messagingServiceSid: 'MGwwwwwwwwwwwwwwwwwwwwww',
            to: '+12345678910'
        })

    console.log('sent message ', message, response);
    state.messageSent = true
}

function start() {
    console.log(`started`)
    
    state.watcherInterval = setInterval(watcher, 60000)
}
async function watcher() {
    //initConnections
    let web3 = new Web3(new Web3.providers.IpcProvider('/root/mainnet/geth.ipc', net));
    let isSyncing = await web3.eth.isSyncing()
    state.lastSyncStatus = { time: new Date(), isSyncing }
    let status = 0
    if (isSyncing !== false) {

        console.log(`Lost sync ${new Date()} status =`, isSyncing)
        if (state.lastOutOfSyncTime !== null) {
            let gap = (Date.now() - state.lastOutOfSyncTime) / 60_000
            state.outOfSyncGaps.push(gap)
        }
        state.lastOutOfSyncTime = Date.now()
        status = 1
    }
    //check all three previous ==1
    if (state.previousStatuses.reduce((a, b) => a + b, 0) == 3) {
        sendMessage(`Node lost sync ${new Date()}`)
    }
    state.previousStatuses.push(status)
    state.previousStatuses.shift()
}