alipay.trade.refund(统一收单交易退款接口)如何判断退款是否成功

1、通过同步返回的信息来判断退款

  调用退款接口成功同步返回信息示例：

{"alipay_trade_refund_response":{"code":"10000","msg":"Success","buyer_logon_id":"150****8675","buyer_user_id":"2088702939584880","fund_change":"Y","gmt_refund_pay":"2018-08-01 14:16:22","out_trade_no":"201881141452422","refund_fee":"0.01","send_back_fee":"0.00","trade_no":"2018080121001004890510526853"},"sign":"HxpAjxLvEE8LdNhiwsNZ1