Reach (https://withreach.com/) is a global payment processor. If you see things that reference GoInterpay its because they recently changed their name.
This file was written and meant for Ruby on Rails applications.
Because ActiveMerchant isn't accepting any new gateways, I figured it might be helpful to someone to add it here.
Ensure that ActiveMerchant is installed:
gem 'activemerchant'
To use this file copy it to your /lib/active_merchant/billing/ folder.
Reach Checkout API Guide:
Copyright Bryan Alexander 2019. All rights reserved.