script needed for steamvr. VR developers only.

We have an existing game project that uses steamvr and already has existing mapped buttons to existing actions. We want a script that can retrieve the current button bindings to those actions and display them on a ui canvas showing the action and the corresponding button mapping. It needs to be able to looks up bindings for the following vr controllers in steam vr, oculus, htc vive, and knuckles. You must have access to all of this dev hardware to verify the script works.