# 请求部分退款

向用户发送部分退款请求。关于退款流程和支持部分退款的支付方式的详细信息，请参阅我们的文档。


注：您可以在沙盒模式下调用此API方法，方法是在请求中传入测试支付的数据。关于沙盒模式访问和测试场景的详细信息，请参阅说明。





注意此API调用不包含project_id路径参数，因此您需要使用在您公司的所有项目中都有效的API密钥来设置授权。

Endpoint: PUT /merchants/{merchant_id}/reports/transactions/{transaction_id}/partial_refund
Version: 2.0
Security: basicAuth

## Path parameters:

  - `merchant_id` (integer, required)
    商户ID。

  - `transaction_id` (integer, required)
    交易ID。

## Request fields (application/json):

  - `description` (string, required)
    退款原因。

  - `refund_amount` (number, required)
    以购买货币表示的退款金额。

## Response 404 fields (application/json):

  - `message` (string)
    不存在所指定ID的交易。请检查支付凭据。否则请发送邮件至support@xsolla.com与艾克索拉支持人员联系。

## Response 422 fields (application/json):

  - `message` (string)
    无法接受退款

返回以下消息之一：
- Partial refund is unavailable for operations with user balance.
- Requested transaction is partial refund and cannot be canceled.
- Partial refund is unavailable for subscription payments.
- Refund cannot be completed due to a payment system error. Please try again 
  later.
- Requested partial refund amount exceeds payment amount.
- Requested partial refund amount is less than minimum amount specified by 
  payment system.
- Payment amount after partial refund will be less than allowable amount 
  specified by payment system.
- Dispute for this invoice is already opened. Can’t make a refund yet.

当前支付方式不支持部分退款

返回以下消息之一：
- Current payment method does not support partial refunds.
- Current transaction status does not allow refunds.
- Deadline for refund is exceeded.
- Partial refund is unavailable because discount was applied during payment 
  creation.

由于精确度位数错误无法执行部分退款

返回以下消息：
- Partial refund is unavailable because requested amount is specified with 
  incorrect precision for purchase currency.


## Response 204 fields

## Response 403 fields