Weixin Pay Open Platform

1. API intro

Applicable object:Common modeInstitutional mode

Request URL: https://apihk.mch.weixin.qq.com/v3/global/refunds/id/{refund_id}
OR
https://apihk.mch.weixin.qq.com/v3/global/refunds/out-refund-no/{out_refund_no}

Request method: GET

rate limitt:150qps

Pathparameter is a path parameter.

Queryparameter needs to be passed in the request URL.

Bodyparameter needs to be passed in the request JSON.

2. Request Parameters

Name	Variable Name	Type	Required	Description
Merchant ID	mchid	string[1,32]	Yes	Query Merchant ID assigned by WeChat Pay Note: Only forCommon mode Example: 1900000109
Sub-merchant ID	sub_mchid	string[1,32]	Yes	Query Merchant ID assigned to sub-merchants by WeChat Pay Note: Only forInstitutional mode Example: 1900000109
Institution's Merchant ID	sp_mchid	string[1,32]	Yes	Body Merchant ID assigned to merchants by WeChat Pay Note: Only forInstitutional mode Example: 1900000100
WeChat Pay refund order No.	refund_id	string[1,32]	choose one to submit	Path WeChat Pay refund order No. Example: 1217752501201407033233368018
Merchant refund No.	out_refund_no	string[1,64]	choose one to submit	Path Returned refund order No. Example: 1217752501201407033233368018

Request Eample

WeChat Pay refund order NoMerchant refund No


https://apihk.mch.weixin.qq.com/v3/global/refunds/id/50201308462021060109285031309?sp_mchid=126464383&sub_mchid=426157911


https://apihk.mch.weixin.qq.com/v3/global/refunds/out-refund-no/TK88s610005?sp_mchid=126464383&sub_mchid=426157911


									{
										"stock_id": ".NET",
										"limit": 10,
									}


									{
										"stock_id": "Python",
										"stock_creator_mchid": "123456",
										"limit": 10,
									}

3. Response Parameters

Response for successful request:

Name

Variable Name

Type

Required

Description

WeChat Pay refund order No.

id

string[1,32]

choose one to submit

WeChat Pay refund order No.
Example: 1217752501201407033233368018

Merchant refund No.

out_refund_no

string[1,64]

Returned refund order No.
Example: 1217752501201407033233368018

WeChat Pay transaction order No.

transaction_id

string[1,32]

Yes

WeChat Pay transaction order No.
Example: 1217752501201407033233368018

Original merchant transaction order No.

out_trade_no

string[1,64]

Yes

The returned original transaction order No.
Example: 1217752501201407033233368018

Refund channel

channel

string[1,16]

No

ORIGINAL：Refund to the paying account
BALANCE：Refund to the balance
OTHER_BALANCE：Refund to other balance accounts in case of original account error
OTHER_BANKCARD：Refund to other bank cards if there is something wrong with the original bank card.
Example: ORIGINAL

Refund receiving account

recv_account

string[1,64]

No

Refund receiving party of the current refund order
1） Refund to bank cards：
{Bank name}{Card type}{Last numbers of the bank card}
2）Refund to the balance of the paying use:
The balance of the paying user
3）Refund to the Mini Fund of the paying user:
The Mini Fund of the paying use
Example: China Merchants Bank Credit Card 0403

Refund source

fund_source

string[1,30]

No

REFUND_SOURCE_UNSETTLED_FUNDS：Refund with unsettled funds (default)
REFUND_SOURCE_RECHARGE_FUNDS：Refund with available balance
Example: REFUND_SOURCE_UNSETTLED_FUNDS

Refund completion time

success_time

string[1,64]

No

Refund completion time, which is returned when the refund status is successful.
Example: 2018-06-08T10:34:56+08:00

Refund creation time

create_time

string[1,64]

Yes

Refund acceptance time
Example: 2018-06-08T10:34:56+08:00

Refund status

status

string[1,16]

Yes

Refund status:
SUCCESS：Refund successful
REFUNDCLOSE：Refund closed
PROCESSING：Refund in process
ABNORMAL: The refund is abnormal. When the refund is made to the bank, the user’s card is found to be invalid or frozen, which leads to the failure of the original bank card refund. You can go to [Service Provider Platform -> Transaction] to manually process the refund
Example: SUCCESS

Refund amount

amount

object

Yes

Information on the refund amount. For more information, see the description below.

Name

Variable Name

Type

Required

Description

Refund amount

refund

int

Yes

Refund amount. The minimum unit of the currency can only be an integer. The refund amount cannot exceed the original order amount. If a voucher was used, the backend will refund proportionally.
Example: 888

Currency type

currency

string[1,16]

No

Three-letter code in accordance with ISO 4217.
Example: CNY

Refund amount to user

payer_refund

int

Yes

The amount refunded to the user, excluding all voucher amount
Example: 888

Payment currency

payer_currency

string[1,16]

Yes

Three-letter code in accordance with ISO 4217.
Example: CNY

Settlement Currency Refund Amount

settlement_refund

int

Yes

The refund amount corresponding to the merchant's settlement currency, the smallest unit of the currency, which can only be an integer.
Example: 888

Settlement Currency

settlement_currency

string[1,16]

Yes

Settlement currency, a three-letter code that conforms to the ISO 4217 standard, see the currency type on the currency list.
Example: HKD

Exchange rate

exchange_rate

object

Yes

Exchange rate information

Name	Variable Name	Type	Required	Description
Exchange rate type	type	string[1,16]	No	When the priced currency and the payment currency are the same, type="SETTLEMENT_RATE", i.e. the exchange rate between the [real-time] priced currency and the settlement currency. When the priced currency and the payment currency are different, type="USERPAYMENT_RATE", i.e. the exchange rate between the [original payment] priced currency and the payment currency. Example: SETTLEMENT_RATE
Exchange rate value	rate	int	No	The rate value is the exchange rate multiplied by the 8th power of 10. If the exchange ratio is 1, then rate=100000000. If the exchange ratio is 6.5, then rate=650000000. Example: 8000000

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Refund Source & Amount

from

array

No

This parameter is used to specify the fund source and amount for cross-border funds-distribution orders.
If this parameter is not specified for a funds-distribution order, the refund will be made from the undistributed refundable balance of the order by default, and the shortfall will be made up by the advance refund amount.
The specific fund source and amount are subject to the "from" field in the response parameter.
This parameter applies to usage scenarios meeting the following conditions:
1. The order is a cross-border funds-distribution order. Do not specify this parameter for non-cross-border orders.
Parameter passing needs to meet the following conditions:
1. The sum of the fund amount from the advance refundable balance and the fund amount from the undistributed refundable balance of the order is equal to the refund amount;
2. The fund sources cannot be duplicated.
If any of the above conditions are not met, an error will be returned.

Name	Variable Name	Type	Required	Description
Fund Source	fund_source	string[1,32]	Yes	The source of the refund, which can be any of the enumerated values below. Enumerated values: FUNDS_REFUNDABLE_BALANCE : Advance refundable balance ORDER_REFUNDABLE_BALANCE : Undistributed refundable balance Example：ORDER_REFUNDABLE_BALANCE
Fund Amount	amount	int	Yes	The amount funded from a source, which can only be an integer in the smallest unit of currency. Example：888

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Discount refund details

detail

array

No

Discount refund info. For more information, see the description below.

Name	Variable Name	Type	Required	Description
Voucher ID	promotion_id	string[1,32]	Yes	Voucher or discount ID Example: 109519
Discount range	scope	string[1,32]	No	GLOBAL- All-item voucher SINGLE- Single-item discount Example: SINGLE
Discount type	type	string[1,32]	No	COUPON- Vouchers, which are a kind of top-up vouchers that require fund settlement (the voucher currency of overseas merchants is the same as the payment currency). DISCOUNT- Discount vouchers, which are a kind of top-up-free discount vouchers that require no fund settlement (the voucher currency of overseas merchants is the same as the priced currency). Example: DISCOUNT
Discount voucher price	amount	int	No	The amount for which the user enjoys a discount (Voucher amount = Amount contributed by WeChat + Amount contributed by the merchant + Amount contributed by others) Example: 5
Voucher refund amount	refund_amount	int	No	Voucher amount refunded proportionally Example: 5
Currency type	currency	string[1,16]	Yes	Three-letter code in accordance with ISO 4217. Example: CNY

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Response for failed request:

Name

Variable Name

Type

Required

Description

Returned status code

code

string[1,32]

Yes

Error code. See the error code list for the enumerated values.

Returned information

message

string[1,256]

Yes

Returned message. It indicates the reason for the error if not empty.

Detailed error description

detail

object

No

It is returned when code is PARAM_ERROR. Details will be described below.

Name	Variable Name	Type	Required	Description
The location of incorrect parameter	field	string[1,256]	Yes	If the incorrect parameter is in the JSON for request body, it is populated with the JSON Pointer pointing to this parameter. If the incorrect parameter is in the request URL or querystring, it is populated with the variable name of this parameter.
Value of the incorrect parameter	value	string[1,256]	Yes	Value of the incorrect parameter
Cause of error	issue	string[1,256]	Yes	Cause of error
Location of the incorrect parameter	location	string[1,256]	No	body: The incorrect parameter is in the JSON for request body url: The incorrect parameter is in the request URL query: The incorrect parameter is in the querystring of the request

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Response Example:

No Accounts Order Return Example Accounts Order Return Example Exception Example


{
    "id": "50202002642022072801898085012",
    "out_refund_no": "20220724trade003refund001",
    "transaction_id": "4200000010202207280683365840",
    "out_trade_no": "20220724trade003",
    "channel": "ORIGINAL",
    "status": "SUCCESS",
    "recv_account": "China Merchants Bank Credit Card 0403",
    "fund_source": "REFUND_SOURCE_UNSETTLED_FUNDS",
    "success_time": "2022-07-28T15:44:24+08:00",
    "create_time": "2022-07-28T15:44:07+08:00",
    "amount": {
        "refund": 500,
        "currency": "CNY",
        "payer_refund": 250,
        "payer_currency": "CNY",
        "settlement_refund": 578,
        "settlement_currency": "HKD",
        "exchange_rate": {
            "type": "SETTLEMENT_RATE",
            "rate": 86500000
        }
    },
    "detail": [
        {
            "promotion_id": "11006096615",
            "scope": "GLOBAL",
            "type": "COUPON",
            "amount": 500,
            "refund_amount": 250,
            "currency": "CNY"
        }
    ]
}


{
    "id": "50201702652022072801898085013",
    "out_refund_no": "20220724trade004refund001",
    "transaction_id": "4200000002202207282853224734",
    "out_trade_no": "20220724trade004",
    "channel": "ORIGINAL",
    "status": "SUCCESS",
    "recv_account": "China Merchants Bank Credit Card 0403",
    "fund_source": "REFUND_SOURCE_UNSETTLED_FUNDS",
    "success_time": "2022-07-28T15:52:15+08:00",
    "create_time": "2022-07-28T15:51:57+08:00",
    "amount": {
        "refund": 500,
        "currency": "CNY",
        "payer_refund": 250,
        "payer_currency": "CNY",
        "settlement_refund": 578,
        "settlement_currency": "HKD",
        "exchange_rate": {
            "type": "SETTLEMENT_RATE",
            "rate": 86490000
        },
        "from": [
            {
                "fund_source": "ORDER_REFUNDABLE_BALANCE",
                "amount": 300
            },
            {
                "fund_source": "FUNDS_REFUNDABLE_BALANCE",
                "amount": 200
            }
        ]
    },
    "detail": [
        {
            "promotion_id": "11006096908",
            "scope": "GLOBAL",
            "type": "COUPON",
            "amount": 500,
            "refund_amount": 250,
            "currency": "CNY"
        }
    ]
}


{
	"code": "INVALID_REQUEST",
	"message": "Parameter format verification error",
	"detail": {
		"field": "#/properties/payer",
		"value": "1346177081915535577",
		"issue": "Not in line with ALLOF schema",
		"location": "body"
	}
}

4. Error Codes

Error Message	Description	Solution
SYSTEM_ERROR	Errors returned from the API	Try call the API again.
INVALID_REQUEST	Invalid request	Check your program based on the error message returned by the API.
RESOURCE_NOT_EXISTS	Record not found	Record not found. Modify the parameter and try again.
REFUND_NOT_EXIST	Failed to view the refund order	Check whether the order No. and the order status (e.g. unpaid and paid but not refunded) are correct. If there is no refund order under the order, only this error code is returned.
INVALID_TRANSACTION_ID	Invalid transaction_id	Invalid request parameter. Check whether the original transaction No. exists and whether the API for initiating payment transaction returns failure.
PARAM_ERROR	Request parameter was not properly filled in as instructed.	Invalid request parameter. Re-check the parameter and then call the refund request again.
APPID_NOT_EXIST	APPID does not exist.	Check whether APPID is correct.
MCHID_NOT_EXIST	MCHID does not exist.	Check whether MCHID is correct.
REQUIRE_POST_METHOD	Use post method.	Check whether the request parameter is submitted via post method.
SIGN_ERROR	Signature error	Check if signature parameters and methods meet the algorithm requirements.

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Payments

Funding Products

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Query Single Refund API

1. API intro

2. Request Parameters

Request Eample

3. Response Parameters

Response for successful request:

Response for failed request:

Response Example:

4. Error Codes