EAZZYPAY payment workflow works the exact same way, as the already integrated Safaricom M-PESA. The API backend is the same one used to the used by Safaricom, Apigee. Please find link below for documentation from the bank.
Any one willing to build it???
https://drive.google.com/open?id=1CuNX46WGAanjs9RFvKgQwf1AJx9xHJBi