小程序发起支付提示签名错误?
【请求地址】:https://api.mch.weixin.qq.com/pay/unifiedorder 【请求数据】:<xml> <appid>wx4sss6d4aaa5ddd38</appid> <mch_id>1601110111</mch_id> <nonce_str>1111111111058</nonce_str> <sign>QQQ20D5450CE111632001ZZZ2F2BBC0C</sign> <sign_type>MD5</sign_type> <body>订单:20210820233238</body> <attach><![CDATA[00000002]]></attach> <out_trade_no>20210820233238</out_trade_no> <total_fee>2</total_fee> <spbill_create_ip>0:0:0:0:0:0:0:1</spbill_create_ip> <notify_url>https://dev-mall.xxxxxxx.com/wx/order/pay-notify</notify_url> <trade_type>JSAPI</trade_type> <openid>on8Im5Q3A6PFaaaaa4DaFTRBIsBc</openid> </xml> 【响应数据】:<xml><return_code><![CDATA[FAIL]]></return_code> <return_msg><![CDATA[签名错误,请检查后再试]]></return_msg> </xml>