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I am trying to set up permissions so that when clients want to use my PayPal integration service, I take them through the process of giving my software permission to make express checkout payments on their behalf.

So far, I have followed these steps (I am using the PayPal permissions SDK for .Net):

  1. Use requestPermissions to add the "EXPRESS_CHECKOUT" permission to return the access token.
  2. Use getAccessToken (passing the token and verification code) to obtain the token secret
  3. I then store the token and token secret for future payments.
  4. I attempt to test a payment using the sandbox environment using the ProfileFactory.createPermissionAPIProfile() and generating the signature using "com.paypal.sdk.core.OauthSignature.getAuthHeader". One thing I am not completely sure of here is what is passed as the API URL, I am passing "https://api.sandbox.paypal.com/2.0/"

Now, when I do this and call "SetExpressCheckout", I get an error message saying I don't have permission.

So, I wanted to debug this to test what permissions I have, so I call GetPermissions passing the token but the response object is null? This is really odd, I would expect an error if there was a problem, I cannot see any reason why a null value is returned?

Anyone can help point me in the right direction? Thanks in advance.

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我们使用 NVP API 并代表第三方执行 API 调用，您必须在 API 请求的主题中发送第三方的 PayPal ID。SOAP API 具有相同的元素。

API 文档说这是 authorizing_account_emailaddress，尽管我们发送了 PayPal ID 并且有效。

于 2012-06-11T15:44:18.547 回答