1. Download it here http://3.82.125.197/magento/.
2.Enter your store as an “administrator” user.
3.Disable cache management from “System -> cache management”
4.In the root directory where magento is installed you should do the following
a) In “path_to_magento \ app \ code \” a folder with the name “local” must be created.
b) Paste the EFika folder found in the downloaded .zip into the folder created earlier.
c) Paste the "Efika_GreenPay.xml" file into "path_to_magento \ app \ etc \ modules"
5. Restar magento
To configure our plugin you must go to "System> Configuration> Payment Methods", where the Magento configuration options will be displayed, and the "GreenPay" section must be selected.
In this section all the fields to be configured in our plugin are shown in the following image:
After adding the data, click save, and your customers will be able to pay by credit / debit cards.