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POST
/
payment
/
open
/
institution
/
v1
/
pay
/
order
/
refund
Refund
curl --request POST \
  --url https://openplatform.gateapi.io/payment/open/institution/v1/pay/order/refund \
  --header 'Content-Type: application/json' \
  --header 'X-GatePay-Certificate-ClientId: <x-gatepay-certificate-clientid>' \
  --header 'X-GatePay-Nonce: <x-gatepay-nonce>' \
  --header 'X-GatePay-On-Behalf-Of: <x-gatepay-on-behalf-of>' \
  --header 'X-GatePay-Signature: <x-gatepay-signature>' \
  --header 'X-GatePay-Timestamp: <x-gatepay-timestamp>' \
  --data '
{
  "refundRequestId": "156123911",
  "prepayId": "1647438500687506",
  "refundAmount": "0.8"
}
'
{
  "status": "SUCCESS",
  "code": "000000",
  "data": {
    "refundRequestId": "156123911",
    "prepayId": "1647438500687506",
    "orderAmount": "1.91",
    "refundAmount": "0.8",
    "channelId": ""
  },
  "errorMessage": ""
}

Documentation Index

Fetch the complete documentation index at: https://docs.gate.com/llms.txt

Use this file to discover all available pages before exploring further.

​
Overview

This page documents the POST /payment/open/institution/v1/pay/order/refund endpoint. The full schema, parameters, and examples are rendered from the linked OpenAPI definition above.

​
Notes

Headers

​
X-GatePay-Certificate-ClientId
string
required

Merchant client ID, obtained from GatePay platform

Example:

"4186d0c6-6a35-55a9-8dc6-5312769dbff8"

​
X-GatePay-Signature
string
required

HMAC-SHA256 signature for request validation

Example:

"672d5650dcc9bb22ebf25fa16c28d03c0e159d742a9176d4340a5da326d75dc8a2ec24c97fa6fc5d1533dd6e968863747e1d86a45e562cbe899f9ed7e9ca7f77"

​
X-GatePay-Timestamp
string
required

Timestamp in milliseconds, must be within 5 minutes of server time

Example:

"1672905655498"

​
X-GatePay-Nonce
string
required

Random nonce for replay attack prevention

Example:

"3525756760"

​
X-GatePay-On-Behalf-Of
string
required

Required delegated-subject header. Provide the initiating account ID for this request. For institution merchant APIs, this is typically the target sub-account ID; for institution charge and transfer APIs, it can be either an institution account ID or a sub-account ID.

Body

application/json

Request body for creating a refund order.

​
refundRequestId
string
required

Merchant-generated refund request ID. The ID must be unique and no more than 32 characters long.

​
prepayId
string
required

ID of the completed payment order.

​
refundAmount
string
required

Refund amount, which cannot exceed the total order amount.

​
refundReason
string

Reason for the refund, up to 256 characters.

Response

200 - application/json

Refund request result

Response body for refund API.

​
status
string
required

The status of the response, which can be either SUCCESS or FAIL.

​
code
string
required

The error code.

​
errorMessage
string

The error message.

​
data
object

The information of the refund order.