INET Checkout Session

{
  "orderId": "{{orderId}}",
  "totalAmount": {{totalAmount}},
  "items": [
    { "name": "{{productName}}", "qty": 1, "amount": {{price}} }
  ],
  "allowedPayTypes": ["QR", "QRCS"],
  "successUrl": "https://example.com/success",
  "outputVariable": "checkoutSession"
}