Update
I did not have enough time in the video to show the refund functionality but it is included in the app. I can submit another short video demonstrating the simplicity of requesting a refund through the app. It is also part of the codebase. See the TransactionAdapter OnItemLongClickListener class for the details. The user can long press on a Payment transaction to show a popup menu with an option to request a refund for that payment. The user then enters a reason for the refund and submits. In the sandbox, the refund is processed immediately and the user is credited the amount of the refund.
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