Fix Baileys QR Display Bug for Whatsapp web app

Hi,

I am building a small Node.js service that connects to WhatsApp Web using the Baileys library and generates a QR code so users can link their WhatsApp account.

The project is deployed on Railway and runs an Express server.

My goal is simple:

Create a WhatsApp session per store.

Generate a QR code for linking WhatsApp.

Send messages later using the session.

The server starts correctly and the endpoint /session/create works.However, the QR code is never generated, and the endpoint /session/qr/:store_id always returns:

QR nu este gata. Refresh in cateva secunde.

So it seems the connection.update event is not returning the qr value, or the session is not properly initialized.

What I need help with:

Fix the QR generation so it appears reliably

Make sure the session connects correctly with Baileys

Ensure the Express endpoint /session/qr/:store_id returns the QR image

Ideally add stable reconnection logic

Tech stack:

Node.js

Express

Baileys (@whiskeysockets/baileys)

QRCode package

Hosted on Railway

I will provide my current index.js file. The code is already mostly implemented but something in the session/QR flow is not working.

If possible, I would also like:

stable multi-session support (one WhatsApp per store)

clean working code

Thanks!