Method of detecting key code with new input system (without declaring that key)

Hi,

I believe this question has been asked many times before but I can't get a straight answer from searching the forum.

There is a function that processes any key press but it requires to know what that key is:

Code (CSharp):

1. public void OnKeyDown(KeyCode key)
2. {
3.   ...
4.   e.KeyCode = key;
5.   OnEvent(e);
6.   ...
7. }

It is registered with the unity input system like this:

Code (CSharp):

1. UI.S.started += ctx => OnKeyDown(KeyCode.S);

I am looking for a way to do this without looping through a list of available keys as it is inefficient. I just would like to know what key code I am getting from the input system, without explicitly registering that key, as is done above.

The motivation is simple: I have a system that I do not know which hot key the software will want to use in the future and I do not want and am unable to bind keys explicitly in code because I do not own all the code that is interested in using the input system.

Thanks in advance!