Handling Delivery Webhooks

const express = require('express');
const app = express();

app.use(express.json());

app.post('/api/webhooks/whatsapp', (req, res) => {
  const { referenceId, status, timestamp, error } = req.body;

  console.log(`Message ${referenceId} is now: ${status}`);

  if (status === 'failed') {
    console.error(`Reason: ${error.message}`);
  }

  // Always return 200 OK to acknowledge receipt!
  res.sendStatus(200); 
});

app.listen(3000, () => console.log('Webhook listener running on port 3000'));

{
  "event": "message.status",
  "referenceId": "msg_abc123def456",
  "status": "delivered",
  "timestamp": "2024-05-15T14:32:01Z"
}

{
  "event": "message.status",
  "referenceId": "msg_abc123def456",
  "status": "read",
  "timestamp": "2024-05-15T14:32:15Z"
}

{
  "event": "message.status",
  "referenceId": "msg_abc123def456",
  "status": "failed",
  "timestamp": "2024-05-15T14:32:00Z",
  "error": {
    "code": 131026,
    "message": "Message undeliverable because user is not on WhatsApp."
  }
}