Mercanet
Liferay supports Mercanet as a payment method out-of-the-box. Since Mercanet accepts only EUR, the store’s primary currency must be EUR.
Prerequisites
Generate Credentials
Before configuring your store to use Mercanet, you must generate the following:
- Mercanet Merchant ID
- Secret Key
- Key Version
Set EUR as the Primary Store Currency
When using Mercanet, your store must use Euro as the primary currency.
- 
Open the Global Menu (  ) and navigate to Commerce → Currencies. ) and navigate to Commerce → Currencies.
- 
Click Actions (  ) next to Euro and select Set as Primary. ) next to Euro and select Set as Primary.
Euro is now set as the primary currency.

Activate Mercanet as a payment method
- 
Open the Global Menu (  ) and navigate to Commerce → Channels. ) and navigate to Commerce → Channels.
- 
Select a channel. 
- 
Scroll down then click Edit next to Authorize.Net. 
- 
Switch the Active toggle to Yes. 
- 
Click Save. 
- 
Go to Configuration. 
- 
Enter the following details: - Merchant ID
- Secret Key
- Key Version
 
- 
Select the desired environment settings in the Environment drop-down menu. 
- 
Click Save.