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贵高速更新了 更新了一个orderCheck的参数
orderCheck这个参数不是本地生成 他是请求云端返回的 开发文档中有说明
云函数即在云端（服务器端）运行的函数。在物理设计上，一个云函数可由多个文件组成，占用一定量的 CPU
内存等计算资源；各云函数完全独立；可分别部署在不同的地区。开发者无需购买、搭建服务器，只需编写函数代码并部署到云端即可在小程序端调用，同时云函数之间也可互相调用。
一个云函数的写法与一个在本地定义的 JavaScript 方法无异，代码运行在云端 Node.js 中。当云函数被小程序端调用时，定义的代码会被放在
Node.js 运行环境中执行。我们可以如在 Node.js 环境中使用 JavaScript 一样在云函数中进行网络请求等操作，而且我们还可以通过云函数后端
SDK 搭配使用多种服务，比如使用云函数 SDK 中提供的数据库和存储 API 进行数据库和存储的操作，这部分可参考数据库和 存储后端 API 文档。
云开发的云函数的独特优势在于与微信登录鉴权的无缝整合。当小程序端调用云函数时，云函数的传入参数中会被注入小程序端用户的 openid，开发者无需校验
openid 的正确性因为微信已经完成了这部分鉴权，开发者可以直接使用该 openid
exports.main = async (event, context) => { return new Promise((resolve, reject
) => { setTimeout(() => { resolve(event.a + event.b) }, 3000) }) } wx.cloud.
callFunction({ name: 'add', data: { a: 1, b: 2, }, success: function(res) {
console.log(res.result) // 3 }, fail: console.error }) const cloud = require(
'wx-server-sdk') cloud.init() const db = cloud.database() exports.main = async (
event, context) => { return db.collection('todos').get() }
