Refund Transaction (refund)

This is an API for the merchant system to send a refund request for a transaction through the VNPAY Payment Gateway.

Note:

• refund is one of the functions restricted by VNPAY in the sandbox environment, you need to contact VNPAY for support.
• See more at issue#12

Refund

import { Refund, RefundResponse, dateFormat, getDateInGMT7, VnpTransactionType } from 'vnpay';

/* ... */

/**
 * The date must be in GMT+7 timezone
 * And formatted as `yyyyMMddHHmmss`
 * Use the `getDateInGMT7` and `dateFormat` functions to convert
 */
const refundRequestDate = dateFormat(getDateInGMT7(new Date('2024/05/26')));
const orderCreatedAt = dateFormat(getDateInGMT7(new Date('2024/05/21')));

const result: RefundResponse = await vnpay.refund({
    vnp_Amount: 10000,
    vnp_CreateBy: 'giang',
    vnp_CreateDate: refundRequestDate,
    vnp_IpAddr: '127.0.0.1',
    vnp_OrderInfo: 'Test order',
    vnp_RequestId: '123456',
    vnp_TransactionDate: orderCreatedAt,
    vnp_TransactionType: VnpTransactionType.FULL_REFUND,
    vnp_TxnRef: '123456',
    vnp_Locale: VnpLocale.EN,
    // vnp_TransactionNo: 123456, // optional
} as Refund);

Properties

Refund

Property	Type	Description
vnp_Amount	number	The amount to be refunded to the customer. This amount is less than or equal to the transaction amount.
vnp_CreateBy	string	The person initiating the refund. It could be the username of the merchant who performs the refund.
vnp_CreateDate	number	The time the refund request is made (Request Date) GMT+7.
vnp_IpAddr	string	IP address of the server executing the API call.
vnp_OrderInfo	string	Description of the refund request (Request description).
vnp_RequestId	string	The merchant's system-generated code for each refund request. This code is unique and used to distinguish refund requests. It must not be duplicated within a day.
vnp_TransactionDate	number	The time the transaction is recorded on the merchant's website, calculated in GMT+7.
vnp_TransactionNo	number	The transaction code recorded in the VNPAY system.
vnp_TransactionType	VnpTransactionType	The type of transaction in the VNPAY system.
vnp_TxnRef	string	The payment transaction code of the merchant's system sent to VNPAY for payment request.

RefundResponse

Property	Type	Description
isSuccess	boolean	The result of the request.
isVerified	boolean	The result of data integrity verification when received from VNPay.
message	string	Verification message.
...	...	Other parameters that VNPay will return, refer here.

See more properties that VNPay will return at VNPay.

tip

The parameters that VNPay returns are also in the RefundResponse object.