dart - Paypal 订单v2创建响应:请求的操作无法执行，语义上不正确或业务验证失败

Question

我正在尝试使用dart和PayPal API Orders V2创建付款订单
这是我在url https://api.sandbox.paypal.com/v2/checkout/orders上所做的请求
header 正确。这是 body :

{
  "intent": "CAPTURE",
  "purchase_units": [
    {
      "amount": {
        "currency_code": "EUR",
        "value": "5.0"
      },
      "items": [{
        "name": "First time",
        "unit_amount": {
          "currency_code": "EUR",
          "value": "2.0"
        },
        "quantity": "1"
      },
        {
          "name": "Second item",
          "unit_amount": {
            "currency_code": "EUR",
            "value": "3.0"
          },
          "quantity": "1"
        }]
    }
  ]
}

我收到此错误:

The requested action could not be performed, semantically incorrect,or failed business validation

如果我从正文中删除 items数组，则请求可以正常工作。

Answer 1

传递项目时，您的金额需要一个breakdown对象，如此处所述:https://developer.paypal.com/docs/api/orders/v2/#definition-amount_with_breakdown
一个例子:

                "purchase_units": [{
                    "description": "Stuff",
                    "amount": {
                        "value": "20.00",
                        "currency_code": "USD",
                        "breakdown": {
                            "item_total": {
                                "currency_code": "USD",
                                "value": "20.00"
                            },
                        }
                    },
                    "items": [
                        {
                            "unit_amount": {
                                "currency_code": "USD",
                                "value": "10.00"
                            },
                            "quantity": "1",
                            "name": "Item 1",
                        },
                        {
                            "unit_amount": {
                                "currency_code": "USD",
                                "value": "10.00"
                            },
                            "quantity": "1",
                            "name": "Item 2",
                        },
                    ],
                }]