Introduction

This webhook notification informs merchants when an order is successfully paid, fails.If needed, please provide the refund callback URL for configuration.

Upon payment completion, the payment result and user information are sent to the merchant in JSON format. The merchant should process and respond according to the documentation.
Notifications may be sent multiple times, so the merchant must be able to handle duplicate notifications correctly.
During backend notification interactions, if the merchant’s HTTP response does not equal 200 and the response does not include "success," the notification is considered failed, triggering a retry. Notifications are sent at the following intervals: every 2 minutes for the first 10 minutes, every 10 minutes for the first hour, and every hour for the next 12 hours.
The merchant must validate the signature of the payment result notification and verify that the returned order amount matches the merchant’s order amount to prevent "fake notifications" that could lead to financial loss.
When processing the notification, first check the business data status to determine if the notification has been processed. If not, proceed with handling; if it has been processed, return a success result. Use data locks for concurrency control before checking and processing data to avoid issues from function re-entry.
Fields that are empty (null or "") are not included in the signature.

Refund Webhook Parameters

Parameter	Signature Required	Type	Length	Description
refundType	Yes	string	64	Refund type
merchantOrderNo	Yes	string	64	Merchant order number
paymentOrderNo	Yes	string	64	ACH payment order number
orderStatus	Yes	string	16	Refund order status
tokenAmount	Yes	string	32	Token amount
fiatAmount	Yes	string	16	Fiat amount
fiatCurrency	Yes	string	16	Fiat currency
refundNetwork	Yes	string	32	Refund network (e.g., TRX)
refundToken	Yes	string	32	Refund token (e.g., USDT)
refundOrderNo	Yes	string	64	ACH refund order number
hxAddress	Yes	string	256	Hash address
sign	No	string	128	Signature Check on About the sign

Webhook Status

Code	Description
COMPLETED	Refund succeeded
FAILED	Refund failed

Webhook Parameter Example

{
      "faitAmount": "9.90000000",
      "fiatCurrency": "USD",
      "hxAddress": "05b40909e7dd03cd0c1303c1e740edaa682f15ea7ed4af3bca5adffbe10da277",
      "merchantOrderNo": "17304484880000",
      "orderStatus": "COMPLETED",
      "paymentOrderNo": "300317304490044680240",
      "refundNetwork": "TRX",
      "refundOrderNo": "300217304490044230335",
      "refundToken": "USDT",
      "refundType": "MERCHANT_APPROVE_REFUND",
      "sign": "C2A745E335DE17F3D0C6F2920CD62A96F6F8445E692ED5CDE7EED35BF8AF7B2BC298CC2440700A6F3323A71D18C5200B793286B340B8AB6B67F99424C1B3A154",
      "tokenAmount": "8.40000000"
}