invoice.settled

app.post('/webhooks/settlx', express.raw({ type: 'application/json' }), async (req, res) => {
  // Verify signature first — see Webhook Overview for full verification code
  verifySignature(req);

  const event = JSON.parse(req.body);

  if (event.event === 'invoice.settled') {
    const { invoice, settlement, fees } = event.data;

    // Always identify the order by your own metadata, not by invoice.id
    const orderId = invoice.metadata?.orderId;
    if (!orderId) {
      console.error('Missing orderId in invoice metadata', invoice.id);
      return res.status(200).json({ received: true }); // Acknowledge but log the issue
    }

    // Use eventId for idempotency — store it and skip if already processed
    const alreadyProcessed = await db.events.exists(event.eventId);
    if (alreadyProcessed) {
      return res.status(200).json({ received: true });
    }
    await db.events.insert(event.eventId);

    // netAmount is what landed in your wallet after all fees
    const amountReceived = settlement.netAmount;
    const currency = settlement.currency;

    // Fulfill the order
    await db.orders.update(orderId, { status: 'fulfilled' });
    await fulfillOrder(orderId, { amountReceived, currency });

    console.log(`Order ${orderId} fulfilled. Received ${amountReceived} ${currency}.`);
  }

  res.status(200).json({ received: true });
});