sailthru/sailthru-node-client — pull request #3 by TauZero (2012-02-20 21:43:57+00:00)
Title: Added receiveOptoutPost method for verifying postback requests. 

Accepts an object of parameters. Ensures that 'action', 'email', and 'sig' parameters are defined and that 'action' is defined as 'optout'. Verifies that 'sig' matches the signature hash generated from the other parameters and the api secret.