actionType:                      CREATE
receiverList.receiver(0).email:  ...
receiverList.receiver(0).amount: 5
currencyCode:                    EUR
cancelUrl:                       ...
returnUrl:                       ...
requestEnvelope.errorLanguage:   en_US

然后我用这个URL启动了嵌入式支付流程：
https://www.sandbox.paypal.com/webapps/adaptivepayment/flow/pay?expType=light&payKey= …

灯箱再次关闭后,当我在付费键上调用@L_403_3@方法时,它会给我(以及其他值)：

paymentInfoList.paymentInfo(0).transactionStatus: COMPLETED
status:                                           COMPLETED
actionType:                                       CREATE

显然付款已经执行,但我还没有调用ExecutePay方法.

docs状态(在“PayRequest字段”主题下)：

actionType xs:string

(required) Whether the Pay request pays the receiver or whether the
Pay request is set up to create a payment request,but not fulfill the
payment until the ExecutePayment is called.

Allowable values are:
[…]
CREATE – Use this option to set up the payment instructions with SetPaymentOptions and then execute the payment at a later time with
the ExecutePayment.

我错过了什么？