upd

Code/Inventory/Usable/UseableBase.cs

@@ -0,0 +1,31 @@
+using Sandbox;
+
+namespace Sasalka;
+
+public abstract class UseableBase : Component, IUseable
+{
+	[Property] public float Cooldown { get; set; } = 0.5f;
+
+	private TimeSince _timeSinceUsed;
+
+	protected override void OnStart()
+	{
+		_timeSinceUsed = Cooldown;
+	}
+
+	public virtual bool CanUse()
+	{
+		return _timeSinceUsed >= Cooldown && !Inventar.IsInventoryOpen;
+	}
+
+	public virtual void Use()
+	{
+		if ( !CanUse() )
+			return;
+
+		OnUse();
+		_timeSinceUsed = 0;
+	}
+
+	protected abstract void OnUse();
+}