微信退款返回的几种情况

1、订单已经全额退款返回后再请求退款时：

{ "appid": "wx88888888", "err_code": "ERROR", "err_code_des": "订单已全额退款", "mch_id": "158888888", "nonce_str": "zPT5P04rREEM68yW", "result_code": "FAIL", "return_code": "SUCCESS", "return_msg": "OK", "sign": "1B154A09280A5D6EC148C37A746BA282" }

2、同一个退款号退还不同金额返回或者订单的总金额输入不正确

{ "appid": "wx88888888", "err_code": "REFUND_FEE_MISMATCH", "err_code_des": "订单金额或退款金额与之前请求不一致，请核实后再试", "mch_id": "188888888", "nonce_str": "KGUWO8LLO2BGbvJb", "result_code": "FAIL", "return_code": "SUCCESS", "return_msg": "OK", "sign": "6701AE818027A28EE325B88CC67D48D5" }

3、退款成功

{ "appid": "wx88888888", "cash_fee": "10", "cash_refund_fee": "10", "coupon_refund_count": "0", "coupon_refund_fee": "0", "mch_id": "188888888", "nonce_str": "Dx173KdBSJm8RR0J", "out_refund_no": "B516111547726007", "out_trade_no": "B516111547726007", "refund_channel": [], "refund_fee": "10", "refund_id": "50300604212020051600550537447", "result_code": "SUCCESS", "return_code": "SUCCESS", "return_msg": "OK", "sign": "ED091E5DFFD340F00DED4E67A94A9B5C", "total_fee": "10", "transaction_id": "4200000560202005168434734774" }

4、部分退款的金额不大于总金额，但是和之前加在一起大于总金额时或者先有部分退款再全款退时

{ "appid": "wx88888888", "err_code": "INVALID_REQUEST", "err_code_des": "refund_fee大于可退金额", "mch_id": "188888888", "nonce_str": "Da1KJvHV8cYtofZE", "result_code": "FAIL", "return_code": "SUCCESS", "return_msg": "OK", "sign": "4740747F6232B9F24745F40854358435" }

5、退款金额大于总金额时

{ "return_code": "FAIL", "return_msg": "invalid refund_fee" //无效的退款 }