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" } } |