自适应货币

// Note: POST /payments is deprecated. Checkout sessions don't accept
// `adaptive_currency_fees_inclusive` for one-time payments, so this override
// still runs through the one-time payment route.
const payment = await client.payments.create({
  product_cart: [{ product_id: 'pdt_abc', quantity: 1 }],
  customer: { customer_id: 'cus_123' },
  billing: { country: 'US' },
  adaptive_currency_fees_inclusive: true, // override the business setting for this payment
  return_url: 'https://yoursite.com/return'
});

const session = await client.checkoutSessions.create({
  product_cart: [
    {
      product_id: 'pdt_one_time_or_subscription',
      quantity: 1
    }
  ],
  billing_currency: 'AED',
  return_url: 'https://example.com/return'
});