public class HPComponent : MonoBehaviour, IEntityComponent
{
    // Start is called before the first frame update
    public int hp = 100, hpMax = 100;
    public int invincibleTimer = 0;
//...

This component holds the concepts for health and invincibility time. Its rather simple, so if you need more from it either extend from this class or change it.

Methods

public void Revive()

Sets hp to equal max and puts the invincibleTimer to 10 frames/ticks

public void UpdateComponent()

Updates the invincibleTimer

public bool IsInvincible()

returns true if invincibleTimer > 0, else false

public void TakeDamage(int dmg, int invincibleFrames)

If not invincible, take damage and set invincibleTimer = invincibleFrames

public void SetInvincibleTimer(int i)

Set invincibleTimer to whatever you need to. Helps for say dodge rolls or whatever