Store the last transaction ID in a public property When there's a succesful transaction, stores the last transaction ID in an easy to access property. Allowing you to fetch the transaction ID by using $txn_id = $sp->TransactionId
Adding the ability to refund a transaction
Adding example of how to refund a transaction
Merge pull request #3 from philhawthorne/store-transaction-id

Store Transaction ID and Refund a Payment