เรียกครั้งเดียว callback ครั้งเดียว ลงบัญชีรายการเดียว

curl -X POST https://api.example.com/v2/payins \
  -H "Content-Type: application/json" \
  -H "X-API-Key: <your-api-key>" \
  -H "X-Timestamp: <unix-timestamp>" \
  -H "X-Signature: <hmac-sha256-of-path>" \
  -d '{
    "merchant_ref_id": "unique-order-ref-id-2025001",
    "currency_code": "THB",
    "request_amount": 1000,
    "customer_id": "0198cbc6-fd02-7459-a671-78c306d0a1ad",
    "customer_account_id": "0198cbc7-35ec-7c8c-8994-d3ac3e7f5255",
    "redirect_url": "https://merchant.example.com/payment/success"
  }'

{
  "id": "0198cbff-db9b-7b6a-9f82-6a55fdfb6575",
  "merchant_ref_id": "unique-order-ref-id-2025001",
  "status": "pending",
  "request_amount": 1000,
  "paypage_url": "https://pay.example.com/pay/0198cbff-db9b-7b6a-9f82-6a55fdfb6575"
}