How to make custom payment options?

Question

opencart

You need to make custom checkout fields when choosing a payment method.
At the moment, there is a default payment on delivery, you need to add more similar options (not modular options, because there is online payment, which I don’t need)
All that is needed from them, so that they worked tantamount to "pay on delivery", that is, no e-commerce, just that the selected custom option would be displayed in the admin panel
. It is possible to configure this functionality in the admin panel - not needed
. Is it possible to simply do this by additional inputs in the layout?

Answer 1

Duplicate module cod
Replace all values ​​of this module "cod" with for example tinkoff