SteamVRBooleanAction.cs

using Valve.VR;
using UnityEngine;
using UnityEngine.Events;

public class SteamVRBooleanAction : MonoBehaviour
{
    public SteamVR_Action_Boolean InputAction;
    public SteamVR_Input_Sources InputSource;
    [System.Serializable]
    public class Changed : UnityEvent<bool> {}
    public Changed OutputAction;

    private void Awake()
    {
        if (OutputAction == null)
            OutputAction = new Changed();
    }

    private void OnEnable()
    {
        InputAction[InputSource].onChange += OnChange;
    }

    private void OnDisable()
    {
        InputAction[InputSource].onChange -= OnChange;
    }

    private void OnChange(SteamVR_Action_Boolean action, SteamVR_Input_Sources source, bool state)
    {
        OutputAction.Invoke(state);
    }
}