微信支付接口返回SIGN_ERROR，原因？The WeChat payment interface returns SIGN_ERROR, why?
微信支付接口返回SIGN_ERROR，原因？Request-ID 08E587DC8106109F0518AAB3B74C20931F28A3CA01-269546525
小程序支付返回的结果，上面是Request-ID
{"code":"SIGN_ERROR","detail":{"detail":{"issue":"sign not match"},"field":"signature","location":"authorization","sign_information":{"method":"POST","sign_message_length":346,"truncated_sign_message":"POSTn/v3/pay/transactions/jsapin1614218212n901c7e7d20deb585115a209ed06ff8dan{"appid"n","url":"/v3/pay/transactions/jsapi"}},"message":"错误的签名，验签失败"}
Request ID 08e587dc8106109f0518aab3b74c20931f28a3ca01-269546525 is the result of payment returned by the applet. The above is the result of request ID {"code": "sign"_ ERROR","detail":{"detail":{"issue":"sign not match"},"field":"signature","location":"authorization","sign_ information":{"method":"POST","sign_ message_ length":346,"truncated_ sign_ Message ":" post / V3 / pay / transactions / jsapi "}," message ":" wrong signature, signature verification failed "}"
回答：
签名错误问题可以按照以下几点进行排查：
1、使用签名检查工具校验签名算法是否有误
2、确认秘钥是否有误（服务商模式使用服务商商户号秘钥，秘钥是在商户平台配置，如果同一商户号调用其它接口成功可排除是秘钥问题）
3、确认接口实际的请求参数与生成签名原串的参数一致，不能增加或缺少参数（可通过打印签名原串进行排查）
4、确认参数的大小写，参数名与接口文档一致
5、签名原串的参数值使用原始值，不需要encode
6、接口需要使用UTF-8编码
如果还不能解决你的问题，请前往请前往微信支付V3文档， 点击右下角“技术咨询”实时寻求技术帮助。
参考https://developers.weixin.qq.com/community/develop/doc/0000a4be9a8d5081d94b4e4c051c09
后端的签名错误
群主管理都是支付大佬
你好，请参考这个排查问题，谢谢~
https://developers.weixin.qq.com/community/develop/doc/0000a4be9a8d5081d94b4e4c051c09