E-commerce

[Client] → Checkout site → [Votre backend] → izipay.paymentIntents.create()
                                                 ↓
                                          intent.paymentUrl
                                                 ↓
[Client] redirigé → [Widget IzichangePay] → paye en crypto
                                                 ↓
                            [IzichangePay] webhook payment_intent.completed
                                                 ↓
                            [Votre backend] marque la commande payée
                                                 ↓
                            Auto-settlement déclenché → XOF sur Wave/MoMo

// POST /api/checkout
import { izipay } from './lib/izipay';

export default async function checkout(req, res) {
  const order = await db.orders.create({
    userId: req.user.id,
    items: req.body.items,
    totalXof: computeTotal(req.body.items),
    status: 'pending_payment',
  });

  const intent = await izipay.paymentIntents.create({
    requestedCurrencyType: 'fiat',
    currencyRequested: 'XOF',
    amountRequested: order.totalXof,
    acceptedCoins: ['USDT.TRC20', 'USDT.BEP20', 'USDC.BEP20'],
    merchantReference: order.id,
    returnUrl: `${process.env.SITE_URL}/orders/${order.id}/done`,
    metadata: { orderId: order.id, userId: req.user.id },
    idempotencyKey: `checkout-${order.id}`,
  });

  await db.orders.update({ id: order.id, izipayIntentId: intent.id });
  res.redirect(intent.paymentUrl);
}

// POST /webhooks/izipay
app.post('/webhooks/izipay', express.raw({ type: 'application/json' }), async (req, res) => {
  const event = IziPayClient.validateWebhook(req.body, req.headers['x-izipay-signature'], SECRET);

  if (event.type === 'payment_intent.completed') {
    const { intentId, merchantReference } = event.data;

    // Idempotence côté receveur
    const order = await db.orders.findById(merchantReference);
    if (!order || order.status === 'paid') return res.json({ received: true });

    await db.orders.markPaid(order.id, { izipayIntentId: intentId, paidAt: new Date() });
    await queue.add('send-order-confirmation-email', { orderId: order.id });
  }

  if (event.type === 'settlement.completed') {
    // Optionnel : tracer dans votre compta
    await db.settlements.insert(event.data);
  }

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