How to activate and invoke "iframe" custom template

Hello everyone!

A prospect customer ask us if Kore could use html iframe to embed some external page into a message node (Payment html page)

We told them that Kore has a function that is could do this.

We saw that in the sdk chatWindow.js there is a iframe custom template

Could you be so kind to give us a guide of how to activate the iframe custom template and how invoke it in a message node, and also give us an example of how to catch the payload response in a variable.

Kind Regards!