Baileys.js

const P = require('pino')
const { delay, DisconnectReason, useSingleFileAuthState } = require('@adiwajshing/baileys')
const makeWASocket = require('@adiwajshing/baileys').default;

// start a connection
const startSock = () => {

    const { state, saveState } = useSingleFileAuthState('./auth.json')

    const sock = makeWASocket({
        logger: P({ level: 'fatal' }),
        printQRInTerminal: true,
        auth: state,
    });

    const sendMessageWTyping = async (msg, jid) => {
        await sock.presenceSubscribe(jid)
        await delay(500)

        await sock.sendPresenceUpdate('composing', jid)
        await delay(2000)

        await sock.sendPresenceUpdate('paused', jid)

        await sock.sendMessage(jid, msg)
    }

    sock.ev.on('chats.set', item => console.log(`recv ${item.chats.length} chats (is latest: ${item.isLatest})`))
    sock.ev.on('messages.set', item => console.log(`recv ${item.messages.length} messages (is latest: ${item.isLatest})`))
    sock.ev.on('contacts.set', item => console.log(`recv ${item.contacts.length} contacts`))

    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 sendMessageWTyping({ text: 'maraba amk' }, msg.key.remoteJid)
        }
    })

    sock.ev.on('messages.update', m => console.log(m))
    sock.ev.on('message-receipt.update', m => console.log(m))
    sock.ev.on('presence.update', m => console.log(m))
    sock.ev.on('chats.update', m => console.log(m))
    sock.ev.on('contacts.upsert', m => console.log(m))

    sock.ev.on('creds.update', saveState)

    sock.ev.on('connection.update', function (update, connection2) {
        let _a, _b;
        let connection = update.connection, lastDisconnect = update.lastDisconnect;
        if (connection === 'close') {
            // reconnect if not logged out
            if (((_b = (_a = lastDisconnect.error) === null || _a === void 0 ? void 0 : _a.output) === null || _b === void 0 ? void 0 : _b.statusCode) !== DisconnectReason.loggedOut) {
                startSock()
            }
            else {
                console.log('connection closed');
            }
        }
        console.log('connection update', update);
    });


    return sock
}

startSock()