curl --request POST \
  --url https://api-dev.paymentoptions.com/api/v1/server-to-server-interface/refund \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "transactionId": "9dfd39ec-eb4a-4f8b-a526-17abf140a717",
  "amount": 1000,
  "merchant_id": "< Merchant ID >",
  "notes": "Refund amount captured/purchased"
}
'

{
  "success": true,
  "status_code": 201,
  "is_live": false,
  "transaction_type": "REFUND",
  "gateway_response": {
    "version": "1",
    "type": "INFO",
    "message": "金額が正常に払い戻されました。",
    "code": "INFO0002"
  },
  "merchant_details": {
    "legal_name": "Tink15 Factory",
    "mid": "< Merchant ID >",
    "merchant_txn_ref": "qwe"
  },
  "payment_details": {
    "amount": 1000,
    "response_code": 0,
    "auth_code": "264302",
    "currency": "JPY",
    "payment_method": "ECMC-SSL",
    "scheme": "MASTERCARD",
    "card": {
      "name": "John Doe",
      "number": "5200000000001005",
      "exp_month": "12",
      "exp_year": "29"
    },
    "additional_data": {
      "payment_data_source": {
        "type": "card"
      }
    }
  },
  "transaction_details": {
    "id": "626fa81d-9819-4947-bb9b-b0f11e00a50e",
    "ref": 74824,
    "timestamp": "2024-11-25T08:51:52.000Z",
    "merchant_txn_ref": "qwe"
  }
}