Payzippy is an Indian payment gateway by flipkart.com. This plugin integrates Payzippy payment gateway with your Woocommerce store.
Since the payment gateway is still not complete from Payzippy's side, the currently supported method is credit card only. As soon as the payment gateway becomes ready the plugin will be updated.
Since SHA256 is a better method over MD5, we directly used it rather than providing a choice. We chose the better one for you and stripped off the less secure one.
That's scheduled for the next release. Stay tuned.
Drop me an email at vipulucky93[at]gmail[dot]com
I would me more than happy to get some help with the plugin. You can join me on Github