first install woocommerce plugin for wordpress
then download the project and copy it in /wp-content/plugins/ directory
after refresh plugins page in admin you will see new plugin named Weenx Prepaid WooCommerce Gateway
you should activate it
after installing the plugin you can go to woocommerce->settings->payments and click on manage button of weenx prepaid row to see configuration of your gateway
gateway configuration
title defines title that will be shown to user when want to select the gateway
description you can specify this description to display to user after that gateway selected
sender id specific token that you should get from weenx
plain id specific token that you should get from weenx
encrypt id specific token that you should get from weenx
gateway url endpoint endpoint of weenx prepaid web service that by default is defined
after doing this two step you can use weenx prepaid gateway