// 云函数入口文件 const cloud = require('wx-server-sdk') const mysql = require('mysql2/promise')   cloud.init() // 使用当前云环境 // 云函数入口函数 exports.main = async (event, context) => {   const wxContext=cloud.getWXContext()   try{     const connection =await mysql.createConnection({       host:"",       database:"xxs",       user:"root",       password:"",       port:"3306"     })     const[rows,fields]=await connection.execute("INSERT INTO integral_list (open_id,create_time) VALUES('"+ wxContext.OPENID +"' ,NOW() ) ")     const[rows1,fields1]=await connection.execute("UPDATE sys_customer SET integral = integral+1 WHERE open_id='"+ wxContext.OPENID +"' ")      connection.end();     return rows;   }   catch(err){     console.log("连接错误！",err)     return err;   } } 这是代码,调用报错,实在找不到语法哪里有错误 WAServiceMainContext.js?t=wechat&s=1692146197700&v=2.33.0:1 Error: cloud.callFunction:fail Error: errCode: -504002 functions execute fail | errMsg: Runtime.UserCodeSyntaxError: SyntaxError: Unexpected token '('     at Object.module.exports.load (:35115/var/runtime/node12/UserFunction.js:32)     at Runtime.handleOnce (:35115/var/runtime/node12/Runtime.engine.js:99)     at Timeout._onTimeout (:35115/var/runtime/node12/Runtime.engine.js:56)     at listOnTimeout (:35115/appservice/internal/timers.js:549)     at processTimers (:35115/appservice/internal/timers.js:492) (callId: 1692165600795-0.494791146595986) (trace: 14:0:0 start->14:0:1 system error (Error: errCode: -504002 functions execute fail | errMsg: Runtime.UserCodeSyntaxError: SyntaxError: Unexpected token '('     at Object.module.exports.load (:35115/var/runtime/node12/UserFunction.js:32)     at Runtime.handleOnce (:35115/var/runtime/node12/Runtime.engine.js:99)     at Timeout._onTimeout (:35115/var/runtime/node12/Runtime.engine.js:56)     at listOnTimeout (:35115/appservice/internal/timers.js:549)     at processTimers (:35115/appservice/internal/timers.js:492)), abort)     at O (<anonymous>:1:163208)     at <anonymous>:1:195232(env: Windows,mp,1.06.2306020; lib: 2.33.0)

我在 project.config.json中配置了"cloudfunctionRoot": "cloud/",然后重新编译没有生成文件

<xml>     <nonce_str>88630f9a9e9c4b33b064d0afe42e03c3</nonce_str>     <out_trade_no>33513711643181625117</out_trade_no>     <out_refund_no>33513711643181625117</out_refund_no>     <appid>wxfc5c98bc94248dd4</appid>     <refund_fee>100</refund_fee>     <total_fee>100</total_fee>     <sign>3CEB59A0D616DC44D7BA6EB211A41350</sign>     <mch_id>1800008281</mch_id>     <sub_mch_id>1619744204</sub_mch_id> </xml> https://api.mch.weixin.qq.com/secapi/pay/refund 服务商模式调用的这个退款接口，一直报签名错误