/* * @Description: 微信各种支付 * @Author: chtao * @Email: victoryct@163.com * @Github: https://github.com/LadyYang * @Date: 2020-06-18 23:24:38 * @LastEditors: chtao * @LastEditTime: 2020-08-02 17:02:03 * @FilePath: \wx-gzh\lib\pay.ts */ import crypto from 'crypto'; import { parseString } from 'xml2js'; import { promisify } from 'util'; import WeChat from '..'; import { post } from '../utils'; const ps = promisify(parseString); function raw(args: { [P: string]: string | number }) { return Object.keys(args) .sort() .reduce((prev, key) => { prev += '&' + key + '=' + args[key]; return prev; }, '') .substr(1); } // 签名 function sign( this: WeChat, options: { attach: string; body: string; nonce_str: string; openid: string; out_trade_no: string; total_fee: number; trade_type: string; } ) { const ret = { appid: this.appID, attach: options.attach, body: options.body, mch_id: this.payOptions!.mch_id, nonce_str: options.nonce_str, notify_url: this.payOptions!.notify_url, openid: options.openid, out_trade_no: options.out_trade_no, spbill_create_ip: this.payOptions!.client_ip, total_fee: options.total_fee, trade_type: options.trade_type, }; const string = raw(ret) + '&key=' + this.payOptions!.key; return crypto .createHash('md5') .update(string, 'utf8') .digest('hex') .toUpperCase(); } //签名加密算法,jsapi 第二次的签名 function signSecond( this: WeChat, options: { timeStamp: string; nonceStr: string; package: string; signType: string; } ) { const ret = { appId: this.appID, timeStamp: options.timeStamp, nonceStr: options.nonceStr, package: options.package, signType: options.signType, }; const string = raw(ret) + '&key=' + this.payOptions!.key; return crypto .createHash('md5') .update(string, 'utf8') .digest('hex') .toUpperCase(); } function createNonceStr() { return Math.random().toString(36).substr(2, 30); } function createTimeStamp() { return Math.floor(new Date().getTime() / 1000) + ''; } function getBookingNo() { const date = new Date(); const year = date.getFullYear(); const month = date.getMonth() + 1; const day = date.getDate(); return '' + year + month + day + Math.random().toString(10).substr(2, 30); } async function order( this: WeChat, options: { attach: string; body: string; openid: string; total_fee: number; trade_type: string; } ) { const nonce_str = createNonceStr(); const out_trade_no = getBookingNo(); options.total_fee *= 100; const url = 'https://api.mch.weixin.qq.com/pay/unifiedorder'; const formData = ` ${this.appID} ${this.payOptions!.mch_id} ${this.payOptions!.notify_url} ${this.payOptions!.client_ip} ${options.attach} ${options.body} ${nonce_str} ${options.openid} ${out_trade_no} ${options.total_fee} ${options.trade_type} ${sign.call(this, { ...options, nonce_str, out_trade_no, })}`; const result: any = await post(url, formData, false); return await ps(result); } export async function createJSAPIPayOrder( this: WeChat, options: { payType: string; num: string; price: number; openid: string; body?: string; } ) { const attach = options.num + 'wxpay' + options.payType + 'wxpay' + options.openid; return await order.call(this, { ...options, attach, body: options.payType, total_fee: options.price, trade_type: 'JSAPI', }); } export async function createH5PayOrder( this: WeChat, options: { payType: string; num: string; price: number; openid: string; body?: string; } ) { const attach = options.num + 'wxpay' + options.payType + 'wxpay' + options.openid; const orderResult: any = await order.call(this, { ...options, attach, body: options.payType, total_fee: options.price, trade_type: 'JSAPI', }); if ( orderResult.xml.return_code[0] === 'SUCCESS' && orderResult.xml.result_code[0] === 'SUCCESS' ) { const timeStamp = createTimeStamp(); const nonceStr = orderResult.xml.nonce_str[0]; const _package = 'prepay_id=' + orderResult.xml.prepay_id[0]; const signType = 'MD5'; const paySign = signSecond.call(this, { timeStamp, nonceStr, package: _package, signType, }); return { appId: this.appID, timestamp: timeStamp, nonceStr: nonceStr, package: _package, signType: signType, paySign: paySign, }; } else { throw JSON.stringify(orderResult); } }