如何使用Nodejs在paypal结账中添加多个项目

npm install paypal-rest-sdk

var paypal = require('paypal-rest-sdk');

paypal.configure({
  'mode': 'sandbox', // 指定PayPal的运行环境，可以是sandbox或者live
  'client_id': 'YOUR_CLIENT_ID',
  'client_secret': 'YOUR_CLIENT_SECRET'
});

var payment = {
  "intent": "sale",
  "payer": {
    "payment_method": "paypal"
  },
  "redirect_urls": {
    "return_url": "http://localhost:3000/success",
    "cancel_url": "http://localhost:3000/cancel"
  },
  "transactions": [{
    "item_list": {
      "items": [{
        "name": "Item 1",
        "sku": "item1",
        "price": "10.00",
        "currency": "USD",
        "quantity": 1
      }, {
        "name": "Item 2",
        "sku": "item2",
        "price": "20.00",
        "currency": "USD",
        "quantity": 2
      }]
    },
    "amount": {
      "currency": "USD",
      "total": "50.00"
    },
    "description": "This is the payment description."
  }]
};

paypal.payment.create(payment, function(error, payment) {
  if (error) {
    throw error;
  } else {
    for (var i = 0; i < payment.links.length; i++) {
      if (payment.links[i].rel === 'approval_url') {
        console.log(payment.links[i].href);
      }
    }
  }
});