<appid>小程序appid</appid>
<mch_id>微信分配商户号</mch_id>
<nonce_str>ddnx2rmmcja3jl8c1q5siy7ibadi2s82</nonce_str>
<sign>336801AEFEA8A484D1B0332C5CD2CBA7</sign>
<body>测试商品</body>
<attach>wx190410172223v4zqygm</attach>
<out_trade_no>xym1554887079818</out_trade_no>
<total_fee>2</total_fee>
<spbill_create_ip>127.0.0.1</spbill_create_ip>
<time_expire>20190410215000</time_expire>
<notify_url> notify_url </notify_url>
<trade_type>JSAPI</trade_type>
<openid>openid</openid>
你好，请在首页搜索签名错误
关键字，以获得以下解答链接：https://developers.weixin.qq.com/community/develop/doc/000808700a0668a01168b900656800?highLine=%25E7%25AD%25BE%25E5%2590%258D%25E9%2594%2599%25E8%25AF%25AF
返回签名错误,不知道什么原因