Available on DBC

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.

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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.

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Requirements for Rate Limiter

Quote Token Only

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).

Single Swap Per Transaction

Rate limiter doesn’t allow user to send multiple swap instructions (or CPI) to the same pool in 1 transaction.

Mutually Exclusive with Fee Scheduler

Developers have to choose between using Fee Scheduler or Rate Limiter for their pool.

Max Limiter Duration ≤ 12 Hours

Max limiter duration must be less than or equal to 12 hours.

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…

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Which Launch Pools support Rate Limiter?

Rate Limiter is available as an option for Dynamic Bonding Curve (DBC). Rate Limiter for DAMM v2 is coming soon.