test.js

const fs = require('fs')
const { Boom } = require('@hapi/boom')
const { 
    default: makeWASocket,
    AnyMessageContent,
    delay,
    DisconnectReason,
    fetchLatestBaileysVersion,
    useMultiFileAuthState
 } = require('@adiwajshing/baileys')
const P = require('pino')
const MAIN_LOGGER = P({ timestamp: () => `,"time":"${new Date().toJSON()}"` })
const logger = MAIN_LOGGER.child({ })
logger.level = 'error'

const startSock = async() => {
	global.callUsers = []
	const { state, saveCreds } = await useMultiFileAuthState('session')
	const { version, isLatest } = await fetchLatestBaileysVersion()
	console.log(`WhatsApp - v${version.join('.')} ${isLatest ? '- Last version' : ''}`)

	const sock = makeWASocket({
		version,
		logger,
		printQRInTerminal: true,
		auth: state,
	})
  
	sock.ev.on('messages.upsert', async m => {
		console.log(JSON.stringify(m, undefined, 2))

		const msg = m.messages[0]
		if(!msg.key.fromMe && m.type === 'notify') {
			console.log('replying to', m.messages[0].key.remoteJid)
			await sock.sendReadReceipt(msg.key.remoteJid, msg.key.participant, [msg.key.id])
			await sock.sendMessage(msg.key.remoteJid, {text: 'test!'})
		}

	})
	
	sock.ev.on('connection.update', (update) => {
		const { connection, lastDisconnect } = update
		if(connection === 'close') {
			if(new Boom(lastDisconnect.error)?.output?.statusCode !== DisconnectReason.loggedOut) {
				startSock()
			} else {
				console.log('Connection closed.')
			}
		}
		if (update.connection !== undefined) {
			console.log(`[Connection] ${update.connection}.`)
		}
	})
	
	sock.ev.on('creds.update', saveCreds)
	return sock
}

startSock()