How I can add a IP field in contact form email magento 2

by |Published September 29, 2019

How I can add a IP field in contact form email?
I added this field to the email template

{{IP}} {{var data.ip}}

but where I can get the data?

in magento 1 I used this in indexController.php:

        // Add the IP..
         $postObject->setData(
             'ip', 
             $_SERVER['REMOTE_ADDR'] 
          );

Any help would be appreciated.