We have already pre-configured the plugin, now let's move on to the payment configuration. To do this, from the administration menu choose Settings -> Store -> Payment methods
Here we see three methods coming from our plugin:
Let's move to the settings of the last one, we will look at its settings and change its name
As you can see, this method has an availability rule set to "Tpay only PLN". Thanks to this rule our payment will appear on the customer's list of choices only if the currency of the order is PLN.