Generate a Unity script which allows you to access your Animator values without having to use string variables.

1. Import the ScriptableAnimator.cs into your Unity Project
2. Open up your Animator in the Inspector and hit the "Generate Script" Button. This creates a two new Scripts in the Folder "Assets/Generated/Animator" A State.cs, which is just a helper class, and a class with the name of your AnimatorController like "PlayerAnimator.cs"
3. Add this PlayerAnimator Script to the same Object the Anomator is attached to 4 Done!

Store a Reference in the Script you wan't to use the Animator

using IG.Generated.gAnimator;
...
private PlayerAnimator animator;

  private void Awake()
  {
    animator = GetComponent<PlayerAnimator>();
  }

// set a Trigger
animator.Parameter.SetJump();
// set a value
animator.Parameter.Running = true;

The scripted Animator stores the animations in the same layered way the animator does, so if you want to call a animation on your "Base" Layer you would call animator.base.attack.Play(); If you use substates you could start the substate with the entrystate exactly the same by calling animator.base.substate.Play(); or play a childstate by calling animator.base.substate.child.Play();