This is a simple package that will get you Vive wand input from OpenVR.
The script will give you all the inputs you need, like VRInput.LeftTriggerMagnitude or VRInput.RightGripDown. Remember to add using VRI; at the top of whatever script you are working in to use it.
You can edit the prefab settings to change the thresholds of what is considered to activate the trigger.
The only changes this script will do to your Unity project, is adding more entries to the Input Manager.
This package is not for production, but to help better understand these docs without examples.