Pruebas

cloudflared tunnel --url localhost:3000

{
  "url": "https://abc123.trycloudflare.com/webhook"
}

// Incorrecto: usando el body parseado
const signature = crypto
  .createHmac('sha256', secret)
  .update(JSON.stringify(req.body))
  .digest('hex');

// Correcto: usando el body en crudo
app.use('/webhook', express.raw({ type: 'application/json' }));
app.post('/webhook', (req, res) => {
  const signature = crypto
    .createHmac('sha256', secret)
    .update(req.body) // Buffer en crudo
    .digest('hex');
});