NODE_KOA_PAYJS_DEMO

payjs.api.js

const uuid = require('uuid')
const md5 = require('md5')
const qs = require('query-string')
const Router = require('koa-router')
const apiRoute = new Router()

const NOTIFY_URL = ''
const CALLBACK_URL = ''
const MCHID = '🆔'
const KEY = '🗝'
const API = 'https://payjs.cn/api/cashier'

apiRoute.get('/pay', (ctx, next) => {
  const { title: body, fee: total_fee } = ctx.query
  const params = { 
    mchid: MCHID,
    out_trade_no: uuid.v4().replace(/-/gi, ''),
    body,
    total_fee
  }
  if (NOTIFY_URL) {
    params.notify_url = NOTIFY_URL
  }
  if (CALLBACK_URL) {
    params.callback_url = CALLBACK_URL 
  }

  params.sign = sign(params)
  const redirectURL = API + '?' + qs.stringify(params)
  console.log('✨ REDIRECT URL 🔗 :', redirectURL)
  ctx.redirect(redirectURL)
})

module.exports = apiRoute

function sign(_) {
  return md5(qs.stringify(_) + `&key=${KEY}`).toUpperCase()
}