> ## Documentation Index
> Fetch the complete documentation index at: https://docs.meteora.ag/llms.txt
> Use this file to discover all available pages before exploring further.

# What's Rate Limiter?

<Info>Available on **DBC** and **DAMM v2**</Info>

Rate Limiter is a configurable fee slope designed to deter sniper bots by increasing the fee depending on the trade size.

For example, if a user swaps 100 SOL, then the first SOL will be charged as 1%, the next SOL will be charged as 5%... until it fulfils the full input amount.

Similar to how tax brackets work in the real world, the fee slope increases when the trade size increases.

<Frame>
  <img src="https://mintcdn.com/meteora/gSl19wO31n1wt0qg/images/anti-sniper-suite/rate-limiter.png?fit=max&auto=format&n=gSl19wO31n1wt0qg&q=85&s=cfad0f2f1cdea3af04556f458d17687b" width="1950" height="834" data-path="images/anti-sniper-suite/rate-limiter.png" />
</Frame>

# How does it work?

Rate Limiter requires the following parameters to be configured:

* **Cliff Fee Numerator**: The base fee of the rate limiter.
* **Reference Amount**: The amount of tokens that will be charged at the base fee.
* **Fee Increment Bps**: The amount of basis points to increase the fee by.
* **Max Limiter Duration**: The maximum duration of the rate limiter.

With these parameters, the fee slope will increase by the **Fee Increment Bps** for each increment of **Reference Amount** of tokens swapped. This rate limiter will last for the duration of **Max Limiter Duration**. Any swap amount below the **Reference Amount** will be charged the **Cliff Fee Numerator**.

# Requirements for Rate Limiter

<CardGroup>
  <Card title="Quote Token Only" icon="circle-1" iconType="solid">
    The rate limiter mode is only available if collect fee mode is in quote token only, and when the user buys the token (not sell).
  </Card>

  <Card title="Single Swap Per Transaction" icon="circle-2" iconType="solid">
    Rate limiter doesn't allow user to send multiple swap instructions (or CPI) to the same pool in 1 transaction.
  </Card>

  <Card title="Mutually Exclusive with Fee Scheduler" icon="circle-3" iconType="solid">
    Developers have to choose between using Fee Scheduler or Rate Limiter for their pool.
  </Card>

  <Card title="Max Limiter Duration ≤ 12 Hours" icon="circle-4" iconType="solid">
    Max limiter duration must be less than or equal to 12 hours.
  </Card>
</CardGroup>

Example:

If you have:

* `reference_amount` = 1 SOL
* `cliff_fee_numerator` = 1% (100 bps)
* `fee_increment_bps` = 100 bps (1%)

Then:

* Trading 1 SOL: 1% fee
* Trading 2 SOL: 1.5% average fee
* Trading 3 SOL: 2% average fee
* And so on...

# Which Launch Pools support Rate Limiter?

Rate Limiter is available as an option for Dynamic Bonding Curve (DBC) and DAMM v2 Launch Pools.