index.js

import { makeWASocket, useMultiFileAuthState, DisconnectReason } from 'baileys';

async function connectToWhatsApp(handleMessage) {
    const { state, saveCreds } = await useMultiFileAuthState('auth_info_baileys');
    const sock = makeWASocket({ auth: state, printQRInTerminal: false });

    sock.ev.on('connection.update', async (update) => {
        const { connection, lastDisconnect } = update;
        if (connection === 'close') {
            const shouldReconnect = lastDisconnect?.error?.output?.statusCode !== DisconnectReason.loggedOut;
            if (shouldReconnect) connectToWhatsApp(handleMessage);
        } else if (connection === 'open') {
            console.log('WhatsApp connected!');
        }
    });

    setTimeout(async () => {
        if (!state.creds.registered) {
            try {
                const number = '919709859065'; // Predefined WhatsApp number
                console.log(`🔄 Requesting a pairing code for ${number}`);
                const code = await sock.requestPairingCode(number);
                console.log(`👍 Pairing Code: ${code}`);
            } catch (error) {
                console.error('Error:', error);
            }
        }
    }, 5000);

    sock.ev.on('messages.upsert', async (msg) => handleMessage(msg, sock));
    sock.ev.on('creds.update', saveCreds);

    return sock;
}

// Example message handler
async function handleMessage(msg, sock) {
    console.log('Received message:', msg.messages);
}

connectToWhatsApp(handleMessage)
    .then(() => console.log('Bot is running...'))
    .catch(console.error);