const crypto  = require('crypto');
const request = require('request');
const qs      = require('qs');let config = {appId: '1234567890',gatewayUrl: 'https://openapi.alipay.com/gateway.do',privateKey: 'PKCS1（非JAVA适用）私钥',publicKey: '支付宝公钥',
};/*** 定义业务参数*/
let biz_content = {create_start_time: '2017-11-30 00:00:01',create_end_time: '2017-12-01 23:59:59',page_num: 1,page_size: 20
};/*** 定义公共参数*/
let data = {app_id: config.appId,version: '1.0',format: 'json',sign_type: 'RSA2',method: 'alipay.marketing.voucher.templatelist.query',timestamp: "2017-12-06 11:52:01",auth_token: '',alipay_sdk: 'alipay-sdk-php-20161101',charset: 'utf-8',biz_content: JSON.stringify(biz_content),app_auth_token: '授权给商户的token',
};/*** 参数排序，转换为字符串*/
let params = [];
for(let name in data) {let val = data[name];if (name == 'sign' || !val) {continue;}params.push(`${name}=${val}`);
}
let queryStr = params.sort().join('&');/*** sign加密处理*/
let key = "-----BEGIN RSA PRIVATE KEY-----\n" +(function() {let arr = [];let offset = 0;while (true) {let str = config.privateKey.substr(offset, 64);if (str == '') {break;}arr.push(str);offset += 64;}return arr.join("\n");})() +"\n-----END RSA PRIVATE KEY-----";
let sign = crypto.createSign('RSA-SHA256');
sign.update(queryStr);
data.sign = sign.sign(key, 'base64');/*** 发送请求*/
let url = config.gatewayUrl + '?' + qs.stringify(data);
request.get(url, function(e, response, res) {console.log(res);
});

商户：授权，获得app auth token，创建优惠卷

用户：访问链接，根据merchant_pid，shop_id 获得优惠卷模版，发送优惠卷