使用 paypal-rest-sdk 时出错。请帮助我

Posted 2023-02-22

【中文标题】使用 paypal-rest-sdk 时出错。请帮助我

【英文标题】：Getting error while using paypal-rest-sdk.Please help me

【发布时间】：2021-12-26 06:21:43

【问题描述】：

当我在下面的代码中使用应付金额为 1 美元时，它工作正常。 工作代码）

const express = require("express");
const router = express.Router();
const paypal = require("paypal-rest-sdk");
paypal.configure(
  mode: "sandbox", //sandbox or live
  client_id: process.env.ID,
  client_secret: process.env.SECRET,
);

router.get("/success", (req, res) => 
 
  const payerId = req.query.PayerID;
  const paymentId = req.query.paymentId;
  const execute_payment_json = 
    payer_id: payerId,
    transactions: [
      
        amount: 
          currency: "USD",
          total: "1.00",
        ,
      ,
    ],
  ;

  paypal.payment.execute(
    paymentId,
    execute_payment_json,
    async (error, payment) => 
      if (error) 
        console.log(error.response);
        throw error;
       else 
        // await Cart.deleteMany();
        // req.flash("success", " order placed ");
        res.send("success")
      
    
  );
);

router.post("/pay", (req, res) => 
  console.log("hii balajee.....")
  const create_payment_json = 
    intent: "sale",
    payer: 
      payment_method: "paypal",
    ,
    redirect_urls: 
      return_url:
        process.env.RETURN_URL || "http://localhost:3000/success",
      cancel_url:
        process.env.CANCEL_URL || "http://localhost:3000/cancel",
    ,
    transactions: [
      
        item_list: 
          items: [
            
              name: "Red Sox Hat",
              sku: "001",
              price: "1.00",
              currency: "USD",
              quantity: 1,
            ,
          ],
        ,
        amount: 
          currency: "USD",
          total: "1.00",
        ,
        description: "This is the payment description.",
      ,
    ],
  ;

  paypal.payment.create(create_payment_json, function (error, payment) 
    if (error) 
      throw error;
     else 
      for (let i = 0; i < payment.links.length; i++) 
        if (payment.links[i].rel === "approval_url") 
          res.redirect(payment.links[i].href);
        
      
    
  );
);

router.get("/cancel", (req, res) => 
//   req.flash("error", "payment cancelled try again");
//   res.redirect("/");
    res.send("done");
);
module.exports = router;

但是当应付金额不是硬编码时。我的意思是应付付款来自客户端，然后我收到错误）：

  name: 'VALIDATION_ERROR',
  details: [
    
      field: 'purchase_units[0]',
      issue: 'Item amount must add up to specified amount subtotal (or total if amount details not specified)'
    
  ],
  message: 'Invalid request - see details',
  information_link: 'https://developer.paypal.com/docs/api/payments/#errors',
  debug_id: 'c683329377177',
  httpStatusCode: 400

(node:17812) UnhandledPromiseRejectionWarning: Error: Response Status : 400

当数据来自客户端时，我使用下面的代码。只是上面代码的一些修改）：

const express = require("express");
const router = express.Router();
const paypal = require("paypal-rest-sdk");
var fees=0;
paypal.configure(
  mode: "sandbox", //sandbox or live
  client_id: process.env.ID,
  client_secret: process.env.SECRET,
);

router.get("/success", (req, res) => 
 
  const payerId = req.query.PayerID;
  const paymentId = req.query.paymentId;
  const execute_payment_json = 
    payer_id: payerId,
    transactions: [
      
        amount: 
          currency: "USD",
          total: fees,
        ,
      ,
    ],
  ;

  paypal.payment.execute(
    paymentId,
    execute_payment_json,
    async (error, payment) => 
      if (error) 
        console.log(error.response);
        throw error;
       else 
        // await Cart.deleteMany();
        // req.flash("success", " order placed ");
        res.send("success")
      
    
  );
);

router.post("/pay", (req, res) => 

  fees= parseInt(req.body.paided);
  console.log(fees);
  const create_payment_json = 
    intent: "sale",
    payer: 
      payment_method: "paypal",
    ,
    redirect_urls: 
      return_url:
        process.env.RETURN_URL || "http://localhost:3000/success",
      cancel_url:
        process.env.CANCEL_URL || "http://localhost:3000/cancel",
    ,
    transactions: [
      
        item_list: 
          items: [
            
              name: "Red Sox Hat",
              sku: "001",
              price: parseInt(req.body.paided),
              currency: "USD",
              quantity: 1,
            ,
          ],
        ,
        amount: 
          currency: "USD",
          total: parseInt(req.body.paided),
        ,
        description: "This is the payment description.",
      ,
    ],
  ;

  paypal.payment.create(create_payment_json, function (error, payment) 
    if (error) 
      throw error;
     else 
      for (let i = 0; i < payment.links.length; i++) 
        if (payment.links[i].rel === "approval_url") 
          res.redirect(payment.links[i].href);
        
      
    
  );
);

router.get("/cancel", (req, res) => 
//   req.flash("error", "payment cancelled try again");
//   res.redirect("/");
    res.send("done");
);
module.exports = router;

我不知道这里出了什么问题。我完全迷失了。我尝试了很多，但无法解决这个错误。请帮助我。 谢谢。

【参考方案1】：

您正在使用已弃用的 SDK，用于已弃用的 v1/payments REST API。

改用 v2/checkout/orders API。有一个 Checkout-NodeJS-SDK 可用。

按照Set up standard payments 指南在您的服务器上创建两条路线，一条用于“创建订单”，一条用于“捕获订单”documented here。两个路由都应该只返回 JSON 数据（没有 html 或文本）。在第二条路线中，当捕获 API 成功时，您应该将其生成的付款详细信息存储在您的数据库中（特别是 purchase_units[0].payments.captures[0].id，这是 PayPal 交易 ID）并执行任何必要的业务逻辑（例如发送确认电子邮件或预订产品）立即在将您的返回 JSON 转发给前端调用者。

将这 2 条路由与前端审批流程配对：https://developer.paypal.com/demo/checkout/#/pattern/server

此解决方案不使用任何重定向。不应从您的网站重定向到批准 URL。