Roku Developer Program

[abhishek]

Should we block any user action during the In App Purchase processing? 

What happens if the user presses back/ tries to cancel his transaction during the in app purchase processing?

Is there any callback/dialog appears in such cases from Roku?

[RokuJoel]

Please see the docs on the ChannelStore node under DoOrder

If the user does not approve the order, the orderStatus field will be set to a ContentNode with fields reflecting the completion status of the command.

if you observe the OrderStatus field of your ChannelStore node, you should be able to see if the value changes.
 - Joel