baileys_whatsapp_connection_with_qr_auth_and_reconnect.ts

1import makeWASocket, { 
2    DisconnectReason, 
3    useMultiFileAuthState 
4} from '@kurtucoben/baileys'
5import { Boom } from '@hapi/boom'
6
7async function connectToWhatsApp() {
8    // 1. Initialize authentication state
9    const { state, saveCreds } = await useMultiFileAuthState('auth_info_baileys')
10
11    // 2. Create the socket connection
12    const sock = makeWASocket({
13        // can provide additional config here
14        auth: state,
15        printQRInTerminal: true
16    })
17
18    // 3. Listen for connection updates (QR code, connection status)
19    sock.ev.on('connection.update', (update) => {
20        const { connection, lastDisconnect } = update
21        if(connection === 'close') {
22            const shouldReconnect = (lastDisconnect?.error as Boom)?.output?.statusCode !== DisconnectReason.loggedOut
23            console.log('connection closed due to ', lastDisconnect?.error, ', reconnecting ', shouldReconnect)
24            // reconnect if not logged out
25            if(shouldReconnect) {
26                connectToWhatsApp()
27            }
28        } else if(connection === 'open') {
29            console.log('opened connection')
30        }
31    })
32
33    // 4. Save credentials whenever they are updated
34    sock.ev.on('creds.update', saveCreds)
35
36    // 5. Example: Listen for incoming messages
37    sock.ev.on('messages.upsert', async m => {
38        console.log('replying to', m.messages[0].key.remoteJid)
39        await sock.sendMessage(m.messages[0].key.remoteJid!, { text: 'Hello there!' })
40    })
41}
42
43// run the function
44connectToWhatsApp()