/v2/payments/refund

POST /v2/payments/refund

The refundĀ API is used to initiate a refund of a successful payment, refund a transaction and return money to the payer. The transaction can be refunded partially or fully. This API returns SUCCESSĀ when deducting money from the merchant is successful.

Note:

1) The merchant/partner submits a refund request to wallets directly

2) Wallets determines whether the refund is successful based on its own payment status and respond to merchants/partners.

3) Multiple refund requests are supported for one successful payment, but the total refund amount can not be greater than the payment amount.

Message structure

Request

Property

Data type

Required

Description

Example

refundRequestIdStringĀ 

Yes

The unqiue ID of a refund generated by merchants.

  • Max. length: 64 characters.
  • This field is used for idempotence control. For the refund requests which are initiated with the sameĀ refundRequestIdĀ and reach a final status (S or F),Ā the walletĀ must return the unique result.

"2019112719074101000700000088881xxxx"

paymentIdStringĀ 

No

TheĀ unqiueĀ ID of the corresponding original payment.

Max. length: 64 characters.

"201911271907410100070000009999xxxx"

paymentRequestIdStringĀ 

No

The paymentRequestId for the corresponding original payment.

Max. length: 64 characters.

"20200101234567890133333xxxx"

refundAmountAmount

Yes

Refund amount.

{

Ā  Ā "currency": "USD",

Ā  Ā "value": "10000"

Ā }

refundReasonStringĀ 

No

Refund reason.

Max. length: 256 characters.

"have returned goods to the shop"

extendInfoStringĀ 

No

The extend information, wallets and merchants can put extending information in this property.

Max. length: 4096 characters.

"This is additional information"

Response

Property

Data type

Required

Description

Example

result

Result

Yes

The request result, which contains information such as status and error codes.

{

Ā  Ā "resultCode": "SUCCESS",

Ā  Ā "resultStatus": "S",

Ā  Ā "resultMessage": "success"

Ā }

refundIdStringĀ 

No

Unique refund order number. It isĀ generated by Wallet, which uniquely identifies the refund.

It is mandatory when the result.resultStatus is S.

Max. length: 64 characters.

"2019112719074101000700000019000xxxx"

refundTime

String/Datetime

No

Deduct money from merchant success time, after then will start to refund money to user.Ā which follows theĀ ISO 8601Ā standard.Ā It is mandatory when the result.resultStatus is S.

"2019-11-27T12:01:01+08:30"

extendInfoStringĀ 

No

The extensive information returned by wallets.

Max. length: 4096 characters.

"This is additional information"

Result Process Logic

In the response, the result.resultStatus field indicates the result of processing a request as follows.

resultStatus

DecriptionĀ 

S

The corresponding result.resultCode is "SUCCESS" and theĀ  result.resultMessageĀ  is "Success".

It means thatĀ the refund is successful, the merchant/partner can process as success.

A

The corresponding result.resultCode is "ACCEPT"; and theĀ  result.resultMessage varies based on different situations.

U

The corresponding result.resultCode is "UNKNOWN_EXCEPTION"Ā and result.resultMessageĀ  is "An API calling is failed, which is caused by unknown reasons.".Ā For details, see the Common error codes section.

It means that when handling the refund request, an unknown exception occurs. The merchant/partner can call the Refund Inquiry (inquiryRefund) API to query or retry this Refund (refund) API. Ā 

What needs to note is as follow:

  • U status (inquiry/retry still gets U) Ā can not set to fail or success on merchant/partner system.
  • U status (inquiry/retry still gets U) Ā should not refund/charge to user by offline (Maybe will make fund loss).

If other response (almost never occur), the merchant/partner should process like U.

F

That means this transaction is failed.Ā The corresponding result.resultCodeĀ  and result.resultMessage vary based on different situations.Ā 

It means that the refund is failed. The failure reasons can be the followings, but not limited to:Ā Ā 

  • The refund date time exceeds the allowable refund window (result.resultCode = REFUND_WINDOW_EXCEED).
  • The refund amount is greater than the payment amount.

For details, see the followingĀ Error codes section.

Error codes

Error codes are usually classified into the following categories:

  • Common error codes: are common for all Mini Program OpenAPIs. Ā 
  • API-specific error codes: are listed in the following table.
resultStatusresultCoderesultMessage
UREFUND_IN_PROCESSRefund is under processing.

F

REPEAT_REQ_INCONSISTENTRepeated submit, and requests are inconsistent.

F

PARTNER_STATUS_ABNORMAL

Partner status abnormal.

F

ORDER_NOT_EXISTOrder does not exist.

F

ORDER_STATUS_INVALIDOrder status is invalid.

F

REFUND_WINDOW_EXCEEDExceed Refund window.

F

REFUND_AMOUNT_EXCEEDThe total refund amount has exceed the payment amount.

F

PARTNER_BALANCE_NOT_ENOUGHThe partner balance is not enough.

F

CURRENCY_NOT_SUPPORTThe currency is not supported.

F

EXPIRED_AGENT_TOKEN

The agent token of Mini Program is expired.

F

INVALID_AGENT_TOKEN

The agent token of Mini Program is invalid.

Sample

For example, a wallet user applies for refund of 100 USD of a successful payment at the merchant/partner. So the merchant/partner will call this refund API to the wallet to refund money to users.

/v2/payments/refund
  1. User can start a refund request from the Mini Program or the merchant cashier.
  2. The merchant server calls this refund interface to refund.
  3. E-wallet returns the refund result to the merchant server.
  4. The merchant should return the refund result to the Mini Program or the merchant cashier.

Request

copy
{
  "refundRequestId": "2019112719074101000700000088881xxxx",
  "paymentId": "201911271907410100070000009999xxxx",
  "refundAmount": {
    "currency": "USD",
    "value": "10000"
  }
}
  • refundRequestId is the unique ID of this refund request, generated by merchant/partner, merchant/partner should make sure it is unique, because wallet will use refundRequestId to do idempotent process.
  • paymentIdĀ is the payment ID generated by Wallet, which is the unique payment identifier associated with this refund.
  • refundAmountĀ describes 100 USD should refund to user, refund amount should less than origin payment amount. The amount to pay out for this refund.refundAmount.currency and paymentAmount.currency in payment request are the same. And if there are multiple refunds for a particular payment, the total successful refunded amount cannot exceed the payment amount in the payment transaction.

Note:

  • paymentId and paymentRequestId can not both empty, wallet has to find out the origin payment order based on paymentId or paymentRequestId.

Response

copy
{
  "result": {
    "resultCode": "SUCCESS",
    "resultStatus": "S",
    "resultMessage": "success"
  },
  "refundId": "2019112719074101000700000019000xxxx",
  "refundTime": "2019-11-27T12:01:01+08:30"
}
  • result.resultStatus==S shows that the Wallet refund is successful.
  • refundId is generated by Wallet, uniquely identifies the refund.
  • refundTime describes the success date time of this refund.