Shopify/active_merchant — pull request #1463 by dppcode (2014-11-17 21:09:40+00:00)
Title: Add void_release method to usaepay transaction gateway.

Also adds a security hash to usaepay transaction gateway api requests.

The void:release method indicates to USAEpay that when the transaction is voided it should immediately send an instruction to the institution to release the funds. With a plain void, the instruction is not sent until the batch closes.