LBox in RoR

I need a simple example of Converge (Elavon) Lightbox integration method ( https://developer.elavon.com/na/docs/converge/1.0.0/integration-guide/integration_methods/lightbox#develop-the-payment-processing-program ) in Ruby on Rails (Rails 4.1.8, Ruby 2.1.4). Ii need this by Sunday morning (in next 24-36 hours).