1. // 云函数入口文件
    2. const cloud = require('wx-server-sdk')
    3. cloud.init()
    4. const app = require('tcb-admin-node');
    5. const {
    6.   WXPay,
    7.   WXPayConstants,
    8.   WXPayUtil
    9. } = require('wx-js-utils');
    10. const ip = require('ip');
    13. // 云函数入口函数
    14. exports.main = async (event, context) => {
    15.   const wxContext = cloud.getWXContext()
    16.   const eventObj = {
    17.     event,
    18.     openid: wxContext.OPENID,
    19.     appid: wxContext.APPID,
    20.     unionid: wxContext.UNIONID,
    21.     mchId: '1498441482',
    22.     key: 'a4169ddae4baaf62f7a1c6f437429eaf',
    23.   }
    25.   const good = event.good
    26.   console.log('232', event)
    27.   const wxpays = new WXPay({
    28.     appId: eventObj.appid,
    29.     mchId: eventObj.mchId,
    30.     key: eventObj.key,
    31.     timeout: 10000,
    32.     signType: WXPayConstants.SIGN_TYPE_MD5,
    33.     useSandbox: false // 不使用沙箱环境
    34.   })
    36.   //支付环节
    37.   const openid = eventObj.openid 
    40.   const curTime = Date.now();
    41.   const tradeNo = `${good.goodId}-${curTime}`;
    42.   const body = good.goodName;
    43.   const spbill_create_ip = ip.address() || '127.0.0.1';
    44.   // 云函数暂不支付 http 触发器，因此这里回调 notify_url 可以先随便填。
    45.   const notify_url = 'http://www.qq.com'; //'127.0.0.1';
    46.   const total_fee = Number(good.price);
    47.   const time_stamp = '' + Math.ceil(Date.now() / 1000);
    48.   const out_trade_no = `${tradeNo}`;    //支付id 即订单id
    49.   const sign_type = WXPayConstants.SIGN_TYPE_MD5;
    51.   let orderParam = {
    52.     body,
    53.     spbill_create_ip,
    54.     notify_url,
    55.     out_trade_no,
    56.     total_fee,
    57.     openid,
    58.     trade_type: 'JSAPI',
    59.     timeStamp: time_stamp,
    60.   };
    62.   // 调用 wx-js-utils 中的统一下单方法
    63.   const {
    64.     return_code,
    65.     ...payData
    66.   } = await wxpays.unifiedOrder(orderParam);
    68.   console.log('申请支付', out_trade_no )
    70.   let order_id = null;
    71.   if (return_code === 'SUCCESS' && payData.result_code === 'SUCCESS'){
    72.     const sign = WXPayUtil.generateSignature({
    73.       appId: eventObj.appid,
    74.       nonceStr: payData.nonce_str,
    75.       package: `prepay_id=${payData.prepay_id}`,
    76.       signType: 'MD5',
    77.       timeStamp: time_stamp
    78.     }, eventObj.key);
    80.     let payDatas = Object.assign(payData, { paySign: sign }, { timeStamp: time_stamp }, { out_trade_no: out_trade_no} )
    81.     console.log('支付签名', payDatas )
    84.     return payDatas
    85.   }
    88. }
    1. {
    2.   "name": "pay",
    3.   "version": "1.0.0",
    4.   "description": "",
    5.   "main": "index.js",
    6.   "scripts": {
    7.     "test": "echo \"Error: no test specified\" && exit 1"
    8.   },
    9.   "author": "",
    10.   "license": "ISC",
    11.   "dependencies": {
    12.     "wx-server-sdk": "latest",
    13.     "ip": "^1.1.5",
    14.     "request": "^2.87.0",
    15.     "tcb-admin-node": "^1.0.30",
    16.     "wx-js-utils": "0.0.4"
    17.   }
    18. }