Rate Limiter is a configurable fee slope that can charge fees ranging from the configured base_fee up to 99% fee (MAX_FEE).

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Rate Limiter Formula

The rate limiter uses a progressive fee calculation with the following key components: Parameters:

• reference_amount (x₀): The base reference amount
• cliff_fee_numerator (c): The base fee rate
• fee_increment_bps (i): The fee increment in basis points
• max_limiter_duration: Duration for which the rate limiter is active

The formula depends on the relationship between input_amount and reference_amount: Case 1: input_amount ≤ reference_amount $$\text{Fee} = \text{Input Amount} \times \text{c}$$ Case 2: input_amount > reference_amount First, decompose the excess amount: $$\text{Input Amount} = x_0 + (a \times x_0 + b)$$ where:

• a: floor division of (Input Amount - x₀) / x₀
• b: remainder of (Input Amount - x₀) mod x₀

Then calculate fees based on whether we exceed the maximum index: Max Index can be calculated as: $$\text{Max Index} = \frac{\text{MAX\_FEE\_NUMERATOR} - c}{\text{fee\_increment\_numerator}}$$ where:

• fee_increment_numerator = (fee_increment_bps * FEE_DENOMINATOR) / 10_000

If a < max_index If a ≥ max_index