spree/spree — pull request #2235 by jhawthorn (2012-11-23 05:27:07+00:00)
Title: Always pass Spree::Payment's currency to  gateway

@gmacdougall's work gave Spree::Payment a currency (same currency as order). This causes that currency always passed to the gateway as the :currency option.

This allows multiple currencies to be used with a payment method, and should save some configuration for single currency sites.