微信单品优惠退款排查
## 背景
同一个商户，同一个满5000-300的单品活动，同一个商品，有的订单可以部分退款，有的订单无法部分退款，提示请全额退款错误
经过认真检查，没有违反任何单品优惠退款的规则，订单金额=单品总价，退款商品goods_id正确，退款金额<订单总金额
退款均请求单品退款接口：https://api.mch.weixin.qq.com/secapi/pay/refundv2
### 可部分退款订单：4200002014202311119476757956
**支付请求参数**
"request_body": {
"body": "XX商城小程序",
"total_fee": 500000,
"fee_type": "CNY",
"spbill_create_ip": "172.22.193.194",
"notify_url": "XXXXXXXXXX",
"trade_type": "JSAPI",
"out_trade_no": "3023111148957838433321",
"sub_appid": "wx69XXXXX494428ce",
"time_start": "20231111213557",
"time_expire": "20231111214057",
"product_id": "3023111148957838433321",
"device_info": "1212021-XX",
"detail": "{\"goods_detail\":[{\"goods_id\":\"71936\",\"goods_name\":\"XX心 · 客房餐饮XX\",\"quantity\":50,\"price\":10000}]}",
"sub_openid": "oy_u45WwvobyFziWCmkj-x4EqFiw",
"scene_info": "{\"store_info\":{\"id\":\"XXX\",\"name\":\"XXXXXXXu5e97\\u603b\\u90e8\"}}",
"profit_sharing": "Y",
"version": "1.0",
"appid": "wx0b0XXXXXXdef401",
"mch_id": "122XXXX702",
"sub_mch_id": "155XXXX491",
"nonce_str": "siTadfoWbj7Gq93v",
"sign": "D29416D6AB3AD9762E7C1D75240E0349"
}
"response_body": {
"return_code": "SUCCESS",
"return_msg": "OK",
"result_code": "SUCCESS",
"mch_id": "122xxxx702",
"appid": "wx0b0XXXXdef401",
"openid": "ox-6_wcki8OY-zeRZkwhhcjCTuLY",
"is_subscribe": "N",
"sub_mch_id": "155XXXX491",
"sub_appid": "wx692XXXXX4428ce",
"sub_openid": "oy_u45WwvobyFziWCmkj-x4EqFiw",
"sub_is_subscribe": "N",
"device_info": "1212021-xxxx",
"trade_type": "JSAPI",
"trade_state": "SUCCESS",
"bank_type": "BOC_DEBIT",
"total_fee": "500000",
"fee_type": "CNY",
"cash_fee": "470000",
"cash_fee_type": "CNY",
"transaction_id": "4200002014202311119476757956",
"out_trade_no": "3023111148957838433321",
"attach": [],
"time_end": "20231111213603",
"trade_state_desc": "支付成功",
"nonce_str": "q4FKsxJkNCtu52GH",
"sign": "7E130582C72667A31F50BA26CD0889ED",
"promotion_detail": "{\"promotion_detail\":[{\"promotion_id\":\"53124272468\",\"name\":\"满5000减300\",\"scope\":\"SINGLE\",\"type\":\"DISCOUNT\",\"amount\":30000,\"activity_id\":\"18078318\",\"wxpay_contribute\":0,\"merchant_contribute\":30000,\"other_contribute\":0,\"goods_detail\":[{\"goods_id\":\"71936\",\"quantity\":50,\"price\":10000,\"discount_amount\":30000,\"goods_remark\":\"\"}]}]}",
"version": "1.0"
}
**退请求参数**
"request_body": {
"out_refund_no": "2024021562697832923106",
"out_trade_no": "3023111148957838433321",
"total_fee": 500000,
"refund_fee": 230000,
"op_user_id": "10001",
"notify_url": "XXXXXX",
"detail": "{\"goods_detail\":[{\"goods_id\":\"71936\",\"goods_name\":\"XX心 · 客房餐饮XX\",\"price\":10000,\"refund_amount\":230000,\"refund_quantity\":23}]}",
"sign_type": "HMAC-SHA256",
"appid": "wx0XXX0cdef401",
"mch_id": "122XXXX702",
"sub_mch_id": "155XXXX491",
"nonce_str": "Q95duFlEUJDcgr6X",
"sign": "15fa8006b1d099dc754fcc15cbe57589e91b2024d3cebc46c6eeda276b732290"
},
"response_body": {
"return_code": "SUCCESS",
"return_msg": "OK",
"result_code": "SUCCESS",
"appid": "wx0bXXXXXXef401",
"mch_id": "122XXXX02",
"sub_mch_id": "155XXXX491",
"nonce_str": "ZbvMY8fjFschuRDj",
"sign": "A8C06222CE4EDA086BA7960CC60F713C8F8EC68DB3739070AC3B32749431B7BF",
"transaction_id": "4200002014202311119476757956",
"out_trade_no": "3023111148957838433321",
"out_refund_no": "2024021562697832923106",
"refund_id": "50303207872024021521876165951",
"refund_fee": "230000",
"total_fee": "500000",
"cash_fee": "470000",
"cash_refund_fee": "216200",
"promotion_detail": "{\"promotion_detail\":[{\"promotion_id\":\"53124272468\",\"scope\":\"SINGLE\",\"type\":\"DISCOUNT\",\"refund_amount\":13800,\"goods_detail\":[{\"goods_id\":\"71936\",\"price\":10000,\"refund_amount\":230000,\"refund_quantity\":23}]}]}"
},
-----------------------
### 不可退款订单：4200002010202311116838410445
**支付请求参数**
"request_body": {
"body": "XX商城小程序",
"total_fee": 500000,
"fee_type": "CNY",
"spbill_create_ip": "172.22.193.31",
"notify_url": "XXXXX",
"trade_type": "JSAPI",
"out_trade_no": "3023111152203967073128",
"sub_appid": "wx692XXXXX4428ce",
"time_start": "20231111223003",
"time_expire": "20231111223503",
"product_id": "3023111152203967073128",
"device_info": "1212021-xxxx",
"detail": "{\"goods_detail\":[{\"goods_id\":\"71936\",\"goods_name\":\"XX心 · 客房餐饮XX\",\"quantity\":50,\"price\":10000}]}",
"sub_openid": "oy_u45RFEpxpXlXqvX-EA569YD1U",
"scene_info": "{\"store_info\":{\"id\":\"xx\",\"name\":\"\xxxxx9152\\u5e97\\u603b\\u90e8\"}}",
"profit_sharing": "Y",
"version": "1.0",
"appid": "wx0b0xxxxx0cdef401",
"mch_id": "122xxxx702",
"sub_mch_id": "155xxxx491",
"nonce_str": "yVnRDQzKfIE9uY0c",
"sign": "20AFDF50FBB4F3CE2BCF9CA5937186C5"
},
"response_body": {
"return_code": "SUCCESS",
"return_msg": "OK",
"result_code": "SUCCESS",
"mch_id": "122xxxx702",
"appid": "wx0b0xxxx0cdef401",
"openid": "ox-6_wZdP7Sgn80HQCe884JPdLeU",
"is_subscribe": "N",
"sub_mch_id": "155xxxx491",
"sub_appid": "wx6924xxxxx4428ce",
"sub_openid": "oy_u45RFEpxpXlXqvX-EA569YD1U",
"sub_is_subscribe": "N",
"device_info": "1212021-xxxx",
"trade_type": "JSAPI",
"trade_state": "SUCCESS",
"bank_type": "GDB_CREDIT",
"total_fee": "500000",
"fee_type": "CNY",
"cash_fee": "470000",
"cash_fee_type": "CNY",
"transaction_id": "4200002010202311116838410445",
"out_trade_no": "3023111152203967073128",
"attach": [],
"time_end": "20231111223054",
"trade_state_desc": "支付成功",
"nonce_str": "nE9X7XhhnzcahN6J",
"sign": "F4C9CDB98CEF2DFC757642F7B4A6E893",
"promotion_detail": "{\"promotion_detail\":[{\"promotion_id\":\"53154054603\",\"name\":\"满5000减300\",\"scope\":\"SINGLE\",\"type\":\"DISCOUNT\",\"amount\":30000,\"activity_id\":\"18078318\",\"wxpay_contribute\":0,\"merchant_contribute\":30000,\"other_contribute\":0,\"goods_detail\":[{\"goods_id\":\"71936\",\"quantity\":50,\"price\":10000,\"discount_amount\":30000,\"goods_remark\":\"\"}]}]}",
"version": "1.0"
},
**退款请求参数**
"request_body": {
"out_refund_no": "2024020245284475031230",
"out_trade_no": "3023111152203967073128",
"total_fee": 500000,
"refund_fee": 330000,
"op_user_id": "10001",
"notify_url": "xxxxxx",
"detail": "{\"goods_detail\":[{\"goods_id\":\"71936\",\"goods_name\":\"凯悦心 · 客房餐饮随心兑\",\"price\":10000,\"refund_amount\":330000,\"refund_quantity\":33}]}",
"sign_type": "HMAC-SHA256",
"appid": "wx0bxxxxdef401",
"mch_id": "122xxxx702",
"sub_mch_id": "155xxxx491",
"nonce_str": "kIRzqiy7jQVuUG8g",
"sign": "ef70bbd28f6eba1e89050795ff001a9b21e2177fb183bcf762f5e4f556918e45"
},
"response_body": {
"return_code": "SUCCESS",
"return_msg": "OK",
"result_code": "FAIL",
"err_code": "ERROR",
"err_code_des": "请使用全额退款",
"appid": "wx0bxxxxxcdef401",
"mch_id": "122xxxx702",
"sub_mch_id": "155xxxx491",
"nonce_str": "ce54FDPJVyt5728F",
"sign": "341A2EEF78AC62B80D5EE1D39FE68FFF1E27C506F2AC8A3D0C871A0BEF5CEAFB"
},
敏感信息均使用XXXX脱敏，应该有微信单号即可，如果需要更详细的信息请回复留言，谢谢
没有请求时间点和完整参数没办法查，拿完整请求参数找在线技术支持查https://support.pay.weixin.qq.com/online-service?from=wechatpay