使用电商收付通完成二级商户进件后，使用该商户唤起小程序支付（使用的是服务商统一下单接口）

Array

(

    [appid] => XXXXXXXXXXX

    [attach] => {"device":"mini","order_type":1,"order_sn":["SO200730133749208140000050"]}

    [body] => XXXXXXXXXXX商品

    [goods_tag] => 

    [mch_id] => XXXXXXXXXXX

    [nonce_str] => pveiuvt8e64ukk8z7mkg011x2n5dl4ct

    [notify_url] => https://XXXXXXXXXXX.html

    [openid] => XXXXXXXXXXX

    [out_trade_no] => 20200730145602408640000052

    [spbill_create_ip] => 192.168.112.1

    [sub_appid] =>XXXXXXXXXXX

    [sub_mch_id] => XXXXXXXXXXX

    [time_expire] => 20200730150603

    [time_start] => 20200730145603

    [total_fee] => 3

    [trade_type] => JSAPI

    [sign] => 6541281749E926108CC5C2B2BB13727A

)

Array

(

    [return_code] => FAIL

    [return_msg] => sub_mch_id与sub_appid不匹配

)