java - SetExpressCheckout with tax, 购物车商品总金额与订单金额不匹配

Question

我有下面的代码可以从 paypal 获取 token ，但不知何故 paypal 一直向我发送错误消息，提示购物车商品总数与订单金额不符。我在这里做错了什么？

                    <ebl:PaymentDetails>
                    <ebl:OrderTotal currencyID="USD">21.70</ebl:OrderTotal>
                    <ebl:TaxTotal currencyID="USD">1.70</ebl:TaxTotal>
                    <ebl:ButtonSource>PayPal_SDK</ebl:ButtonSource>
                    <ebl:PaymentDetailsItem>
                        <ebl:Name>Product A</ebl:Name>
                        <ebl:Quantity>1</ebl:Quantity>
                        <ebl:Tax currencyID="USD">1.70</ebl:Tax>
                        <ebl:Amount currencyID="USD">20.00</ebl:Amount>
                    </ebl:PaymentDetailsItem>
                </ebl:PaymentDetails>

如果我合并税金和金额，它会按预期工作(参见下面的示例)。我想单独征税，以便用户知道他们为产品支付了多少税。

                    <ebl:PaymentDetails>
                    <ebl:OrderTotal currencyID="USD">21.70</ebl:OrderTotal>
                    <ebl:ButtonSource>PayPal_SDK</ebl:ButtonSource>
                    <ebl:PaymentDetailsItem>
                        <ebl:Name>Product A</ebl:Name>
                        <ebl:Quantity>1</ebl:Quantity>
                        <ebl:Amount currencyID="USD">21.70</ebl:Amount>
                    </ebl:PaymentDetailsItem>
                </ebl:PaymentDetails>

Answer 1

好的，所以我需要包含 itemTotal、taxTotal 和 orderTotal 才能使其正常工作。

                    <ebl:PaymentDetails>
                    <ebl:OrderTotal currencyID="USD">43.40</ebl:OrderTotal>
                    <ebl:ItemTotal currencyID="USD">40.00</ebl:ItemTotal>
                    <ebl:TaxTotal currencyID="USD">3.40</ebl:TaxTotal>
                    <ebl:ButtonSource>PayPal_SDK</ebl:ButtonSource>
                    <ebl:PaymentDetailsItem>
                        <ebl:Name>Product A</ebl:Name>
                        <ebl:Quantity>1</ebl:Quantity>
                        <ebl:Tax currencyID="USD">1.70</ebl:Tax>
                        <ebl:Amount currencyID="USD">20.00</ebl:Amount>
                    </ebl:PaymentDetailsItem>
                    <ebl:PaymentDetailsItem>
                        <ebl:Name></ebl:Name>
                        <ebl:Quantity>2</ebl:Quantity>
                        <ebl:Tax currencyID="USD">0.85</ebl:Tax>
                        <ebl:Amount currencyID="USD">10.00</ebl:Amount>
                    </ebl:PaymentDetailsItem>
                </ebl:PaymentDetails>