我们在接入V3版本的“电商收付通-合单支付-合单下单H5支付API”时，调用 https://api.mch.weixin.qq.com/v3/combine-transactions/h5 接口时，一直返回“{"code": "SIGN_ERROR","message": "签名错误"}”，但是调用证书下载接口和图片上传接口是可以成功的。使用工具为Postman,脚本为官方提供的Pre-request脚本，使用官方提供的验签工具，验签是没有问题的
相关问题
我们在接入V3版本的“电商收付通-合单支付-合单下单H5支付API”时，调用 https://api.mch.weixin.qq.com/v3/combine-transactions/h5 接口时，一直返回“{"code": "SIGN_ERROR","message": "签名错误"}”，但是调用证书下载接口和图片上传接口是可以成功的。使用工具为Postman,脚本为官方提供的Pre-request脚本，使用官方提供的验签工具，验签是没有问题的
1 个回答
问题已解决，是sub_mchid传错了。。
{"combine_appid":"wx0f3034714a7186cf","combine_mchid":"1531389481","combine_out_trade_no":"LBZHD16040252196602929","combine_payer_info":{"openid":"oC1HU5Fa4SKPnEepd78Wfbdko2p0"},"notify_url":"https://cloud.bisenaccess.com/pay/wxLbHbPayNotifyRes","sub_orders":[{"amount":{"total_amount":1,"currency":"CNY"},"attach":"合单商户","description":"路内停车缴费","mchid":"1545505541","out_trade_no":"LBHD16040252196556468","sub_mchid":"1545505541"},{"amount":{"total_amount":1,"currency":"CNY"},"attach":"合单商户","description":"路内停车缴费","mchid":"1545505541","out_trade_no":"LBHD16040252196606193","sub_mchid":"1545505541"}],"time_expire":"2020-10-30T11:03:39+08:00","time_start":"2020-10-30T10:33:39+08:00"}请问这个参数有问题吗？一直报XML格式错误