云开发支付
代码前提：只需要替换两个与自己相关的参数key和mch_id
1、小程序开通微信支付成功，去公众平台(https://mp.weixin.qq.com/)；
成功后可以知道自己的mch_id，即商户号。
2、去这里：商户平台(https://pay.weixin.qq.com/)，获取key = API密钥
小程序端：
wx.cloud.callFunction({ name: 'wepay', success: res => { console.log(res.result) if (!res.result.appId) return wx.requestPayment({ ...res.result, success: res => { console.log(res) } }) }}) |
云函数wepay：
const key = "ABC...XYZ"//换成你的商户key，32位const mch_id = "1413092000"//换成你的商户号//以下全部照抄即可const cloud = require('wx-server-sdk')const rp = require('request-promise')const crypto = require('crypto')cloud.init()function getSign(args) { let sa = [] for (let k in args) sa.push(k + '=' + args[k]) sa.push('key=' + key) return crypto.createHash('md5').update(sa.join('&'), 'utf8').digest('hex').toUpperCase()}function getXml(args) { let sa = [] for (let k in args) sa.push('<' + k + '>' + args[k] + '</' + k + '>') sa.push('<sign>' + getSign(args) + '</sign>') return '<xml>' + sa.join('') + '</xml>'}exports.main = async (event, context) => { const wxContext = cloud.getWXContext() let appId = appid = wxContext.APPID let openid = wxContext.OPENID let attach = 'attach' let body = 'body' let total_fee = 1 let notify_url = "https://mysite.com/notify" let spbill_create_ip = "118.89.40.200" let nonceStr = nonce_str = Math.random().toString(36).substr(2, 15) let timeStamp = parseInt(Date.now() / 1000) + '' let out_trade_no = "otn" + nonce_str + timeStamp let trade_type = "JSAPI" let xmlArgs = { appid, attach, body, mch_id, nonce_str, notify_url, openid, out_trade_no, spbill_create_ip, total_fee, trade_type } let xml = (await rp({ url: "https://api.mch.weixin.qq.com/pay/unifiedorder", method: 'POST', body: getXml(xmlArgs) })).toString("utf-8") if (xml.indexOf('prepay_id') < 0) return xml let prepay_id = xml.split("<prepay_id><![CDATA[")[1].split("]]></prepay_id>")[0] let payArgs = { appId, nonceStr, package: ('prepay_id=' + prepay_id), signType: 'MD5', timeStamp } return { ...payArgs, paySign: getSign(payArgs) }} |
packge.json:
{ "name": "wepay", "version": "1.0.0", "description": "", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1" }, "author": "", "license": "ISC", "dependencies": { "wx-server-sdk": "latest", "crypto": "^1.0.1", "request-promise": "^4.2.2" }} |
