var timestamp = (Date.parse(new Date()) / 1000).toString();

var a = 'appId=' + res.data.appid

+ '&nonceStr=' + res.data.nonce_str

+ '&package=prepay_id=' + res.data.prepay_id

+ '&signType=MD5'

+ '&timeStamp=' + timestamp

+ '&key=8e062b0ca08db01e7d3a0b233d80f693';

var paySign = crypt.hex_md5(a).toUpperCase();

wx.requestPayment({

    'timeStamp': timestamp,

    'nonceStr': res.data.nonce_str,

    'package': 'prepay_id='+res.data.prepay_id,

    'signType': 'MD5',

    'paySign': paySign,

    'success': function (res) {

        console.log(res)

    },

    'fail': function (res) {

        console.log(res)

    }

})

总是签名失败 ，那校验工具是自己随便填的，和他一样也没用，大佬看看这里面还有什么坑？