php - 使用paypal付款时会返回错误

Question

当我使用此 API“ https://api.sandbox.paypal.com/v1/payments/payment ”获取“approval_url”时。

它给出的错误如下：

{"name":"VALIDATION_ERROR","details":[{"field":"redirect_urls","issue":"当 payment_method 为 'paypal' 时必须填写此字段"}],"message":"无效请求

查看详细信息 ","information_link":" https://developer.paypal.com/docs/api/payments/#errors ","debug_id":"e48112ca1cd19"}

我已经提到了参数。这是我的阵列。

{  
    "intent":"sale",
    "experience_profile_id":"XP-AAAA-AAAA-AAAA-AAAA",
    "payer":{  
        "payment_method":"paypal"
    },
    "transactions":[  
        {  
            "amount":{  
                "total":"9.00",
                "currency":"EUR"
            }
        }
    ]
},
"redirect_urls":{  
    "return_url":"http://example.com/success",
    "cancel_url":"http:/example.com/error"
}

请让我知道是什么问题。

提前致谢