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sumup / sumup-android-sdk

Sample App for the SumUp Android SDK
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Payment requests fail due to invalid access token.... #74

Closed ambrose-at-cordic closed 5 years ago

ambrose-at-cordic commented 5 years ago

We have been noticing that our customers using our driver app to process chip and pin payments via the Sumup SDK are failing due to "access token invalid" errors.

When we perform payments we always request a fresh token for each transaction yet, we have recently noticed that payments have been failing due to the token being invalid. I have also noted that the process in obtaining a token has changed as seems the grant_type should be "authorization_code" whereas we have been using "password" in our app.

I have also noticed that you have to make an authorization request to obatin the code and this would be used when requesting the token with the grant_type of "authorization_code".

Would this be the cause of these errors?

JullianSU commented 5 years ago

Hi,

Would you be able to share the set up you have and your client_id details at integration@sumup.com? From there, we will be able to look at your issue.

Many thanks,

ambrose-at-cordic commented 5 years ago

Hello @JullianSU , I had recently come back to looking at this as I had updated our app to use v3.2.0 of the SDK and had a recurrence of this issue. I had also shared the setup and client_id details at integration@sumup.com on thursday (20/06/2019). Just wondered if you had received it and again, if there is an issue in using the Resource Owner Password Credentials grant flow to obtain access token as opposed to use of the Authorization Code or the Client Credentials grants. Could this be related to the aouth issues that we have been seeing?