Shopify/active_merchant — pull request #722 by capablemonkey (2013-06-08 22:07:47+00:00)
Title: Dwolla Integration major bug fix & improved tests

Following a failed Shopify deployment of our integration, we've made the following changes:

- Fixed notification and return to calculate the checkout request and callback/redirect signatures correctly.
- Updated tests to use real callback/redirect request data and improved helper signature generation test.
- Only check redirect signature if checkout didn't fail.