Configuring SMARTy Pay plugin
Choose WooCommerce → Settings in the admin's console and proceed to the Payments tab. Choose SMARTy Pay in the payment gateways list and proceed to the settings.
Fill in Merchant API Key and Merchant API Secret - these values can be found in your SMARTy Pay Merchant Admin.
You can leave the rest of the settings as they are.
After saving your settings, you will have SMARTy Pay payments available on your website.
You might also need to choose the correct currency in WooCommerce → Settings → General.
After you activate the SMARTy Pay plugin, new currencies will become available in the list.