I have successfully integrated qr code wechat payment. It is pretty much pointless for mobile website. Client wants something more usable. After some research I have found that H5 payment should do. The thing is I am getting error and can't find anything on the web regarding the issue. The support is probably the worst I have ever dealt with. They tried to point to wrong config being used but when got full payloads, request and responses haven't come back with anything useful.
endpoint: https://api.mch.weixin.qq.com/pay/unifiedorder
payload:
<xml>
<appid><![CDATA[*appid*]]></appid>
<mch_id>*merchantId*</mch_id>
<body><![CDATA[Tickets]]></body>
<detail><![CDATA[{"goods_detail":[[{"goods_id":"3_81","goods_name":"Wicked - 7 June 2018 07:30pm - STALLS K36","quantity":1,"price":1}]]}]]></detail>
<out_trade_no>*11111*</out_trade_no>
<fee_type><![CDATA[CNY]]></fee_type>
<total_fee>1</total_fee>
<spbill_create_ip><![CDATA[192.168.22.1]]></spbill_create_ip>
<time_expire>20180602063844</time_expire>
<notify_url><![CDATA[https://xyz2.local/wechat/confirmation/dfsdfs/erefdav]]></notify_url>
<trade_type><![CDATA[MWEB]]></trade_type>
<nonce_str><![CDATA[*nonce*]]></nonce_str>
<sign><![CDATA[*sign*]]></sign>
</xml>
response:
<xml>
<return_code><![CDATA[FAIL]]></return_code>
<return_msg><![CDATA[商户号该产品权限预开通中，请等待产品开通后重试]]></return_msg>
</xml>
For wechat integration I am using this library: omnipay-wechat All the data between ** is correctly populated. Google translation doesn't make much sense to me. Tried to google for the error in Chinese but haven't found anything helpful.
Wasted already a lot of time.. Hope there is somebody witch wechat payment expierience that can point me to the right direction.
The H5 payment is NOT opened by default. You have to request the approval.