Actualizacion del codigo para los ecommerce sobre la comision de transbank en las compras a su ultima version 2.2.2. Se realizo la actualizacion del codigo a su ultima version para las siguientes mejoras:
Fix: Restore broken woocommerce_pay4pay_get_current_gateway_settings filter (broken since 2.1.0 by accidental find-and-replace).
Fix: Undefined array key warnings for pay4pay_charges_minimum and pay4pay_charges_maximum in settings tab, fixes this forum issue.
Fix: Use proper getter method for product tax_class to avoid WooCommerce deprecation warning.
Fix: Replace deprecated global $woocommerce usage with WC() singleton.