Webhook

Event data

Parameter	Data Type	Description
merchantCode	String	Merchant Code
requestId	String	The requestId when creating refund request.
type	String	Webhook type: Default value "REFUND"
collectionTransId	String	Collection's TransactionId of current refund request
approvalStatus	String	Refund request status, Include: PENDING: Refund request is waiting for approval. APPROVED: Refund request was approved. REJECTED: Refund request was rejected.
status	String	Refund transaction status, Include: SUCCESS: Refund transaction was successful FAILED: Refund transaction was failed
bankSwiftCode	String	Refund/Remitout bank swift code.
bankAccountNumber	String	Refund to bank acount number
bankAccountName	String	Refund to bank acount name.
amount	Number	Amount of refund request in VND
note	String	Note for refund request
failedReason	String	Return failed reason from banking system if refund transaction was failed
createdAt	Datetime String (ISO 8601)	Record created time
secureHash	String (Base64)	Use SHA256 to hash the above parameters (Not include optional params) (sort the key by Alphabet order) + Secret Key (configured on Merchant Portal, in the Collection service menu)

Sample data

{
  "merchantCode": "FVPLLB",
  "requestId": "REFUND-629570097321",
  "collectionTransId": "FT193341033222",
  "amount": 123456,
  "bankSwiftCode": "MCOBVNVX",
  "bankAccountNumber": "9698890000",
  "bankAccountName": "SUMTING WONG",
  "status": "PROCESSING",
  "approvalStatus": "PENDING",
  "createdAt": "2025-05-26T02:43:45.689Z",
  "note": "Test create refund request",
  "secureHash": "vNWPuLtvgzXpB5GKqQPyZEpM+Dbohf2wGjN2/8ho6e4="
}

With the secretKey "SumtingWong@123", the string used to create secureHash will be:

123456PENDINGSUMTING WONG9698890000MCOBVNVXFT193341033222FVPLLBTest create refund requestREFUND-629570097321PROCESSINGREFUNDSumtingWong@123