使用服务商模式，服务商appid:wx1010a36d3025a16e,小程序 appid: wx9a63f9cfa365a915

  统一下单请求：

        {

        "appid":"wx1010a36d3025a16e",

        "body":"测试支付",

        "mch_id":"1602614783",

        "nonce_str":"2020102810213425588NO",

        "notify_url":"XXXXXXX",

        "openid":"oiHuo6UwgcGiAeoGe1sfkbBupA78",

        "out_trade_no":"2020102810213425588NO",

        "profit_sharing":"Y",

        "spbill_create_ip":"120.198.22.66",

        "sub_mch_id":"1603656898",

        "total_fee":1,

        "trade_type":"JSAPI",

        "sign":"58E76C007D83D322062255BE91C61FA5"

    }

    小程序调起支付API：

    wx.requestPayment(

    {

        'timeStamp': '1603852043',

        'nonceStr': '2020102810213425588NO',

        'package': 'prepay_id=wx28102723273479f7a28c3179341f3c0000',

        'signType': 'MD5',

        'paySign': '6F49F6F991B27B03D080DF36D38FDF38',

        'success':function(res){},

        'fail':function(res){},

        'complete':function(res){}

    })

服务商后台关联了小程序appid