Rate limiting for Unity

RateLimiter.cs

using UnityEngine;

[CreateAssetMenu (menuName = "Problematic/Rate Limiter")]
public class RateLimiter : ScriptableObject
{
	[SerializeField]
	float capacity;
	[SerializeField]
	float fillRate;

	TokenBucket tokenBucket;

	void OnEnable ()
	{
		tokenBucket = new TokenBucket (capacity, fillRate);
	}

	public float Tokens {
		get {
			return tokenBucket.Tokens;
		}
	}

	public bool Consume (float count)
	{
		return tokenBucket.Consume (count);
	}
}

TokenBucket.cs

using UnityEngine;

[System.Serializable]
public class TokenBucket
{
	[SerializeField]
	float capacity;
	[SerializeField]
	[Tooltip ("Tokens per second added to the bucket")]
	float fillRate;
	float tokens = 0;
	float timestamp = 0;

	public float Tokens {
		get {
			if (tokens < capacity) {
				float now = Time.time;
				var delta = fillRate * (now - timestamp);
				tokens = Mathf.Min (capacity, tokens + delta);
				timestamp = now;
			}

			return tokens;
		}
	}

	public TokenBucket (float capacity, float fillRate)
	{
		this.capacity = capacity;
		this.fillRate = fillRate;
		timestamp = Time.time;
	}

	public bool Consume (float count)
	{
		if (Tokens >= count) {
			tokens -= count;
			return true;
		}

		return false;
	}

	public override string ToString ()
	{
		return string.Format ("[TokenBucket: capacity={0}, fillRate={1}, tokens={2}, timestamp={3}]", capacity, fillRate, tokens, timestamp);
	}
}