publicgoodsw/braintree-go — pull request #6 by michaelsmanley (2014-12-15 19:05:37+00:00)
Title: expect multiple pairs in signature

This should bring the signature validation into compliance with the latest releases of Braintree's official SDKs. They now send multiple pipe-delimited signature/key pairs separated by ampersands. See https://github.com/braintree/braintree_php/blob/master/lib/Braintree/WebhookNotification.php for an example of another SDK with this functionality.