// Initialize FusionPay
const fusionpay = new FusionPay({
  apiKey: 'your_api_key'
});

// Create payment
const payment = await fusionpay.createPayment({
  amount: 100,
  currency: 'USD',
  description: 'Order #123',
  successUrl: 'https://your-site.com/success',
  cancelUrl: 'https://your-site.com/cancel'
});

// Handle webhook
app.post('/webhook', fusionpay.handleWebhook(async (event) => {
  if (event.type === 'payment.succeeded') {
    await fulfillOrder(event.data);
  }
}));