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This PR implements an MEV-resistant pool that charges additional fees based on price movement during swaps. The core concept is solid - larger price movements incur higher fees to discourage MEV attacks. Here are my findings from testing and code review:

✅ What Works Well

• Tests pass: All existing tests continue to pass, and the new MEV resist pool tests work correctly
• Clean architecture: The wrapper pattern around BasePool is well-designed
• Path dependency tracking: Good addition of is_path_dependent() to distinguish pools where swap order matters

🔍 Areas for Improvement

1. Precision Concerns in u256_to_float_base_x128()

The new function converts U256 to f64, which could lose precision for large values:

pub fn u256_to_float_base_x128(x128: U256) -> f64 {
    x128.0[0] as f64 / 340282366920938463463374607431768211456f64
        + (x128.0[1] as f64 / 18446744073709551616f64)
        + x128.0[2] as f64
        + (x128.0[3] as f64 * 18446744073709551616f64)
}

f64 has ~15-17 decimal digits of precision, but U256 can represent much larger numbers. Consider documenting the precision limitations or using a more precise approach for critical calculations.

2. Duplicate Constants

You now have two related constants in different files:

• SQRT_TICK_SIZE = 1.00000049999987500006249996093752734372949220361326815796989439990616646 (tick.rs)
• LOG_BASE_SQRT_TICK_SIZE = 4.9999975000016666654...e-7 (util.rs)

These represent the same mathematical relationship (log(SQRT_TICK_SIZE)). Consider consolidating to avoid potential drift and make maintenance easier.

3. Clippy Warnings

The build shows several clippy warnings that should be addressed:

• Excessive precision in float constants
• Unnecessary map_or usage
• Useless conversions

Running cargo clippy --fix would clean these up.

4. Missing Documentation

The new public functions lack documentation comments. Consider adding docs for:

• approximate_sqrt_ratio_to_tick()
• u256_to_float_base_x128()
• The MEV resist pool validation logic

🧪 Testing Results

$ cargo test mev_resist
running 2 tests
test quoting::mev_resist_pool::tests::test_swap_output_amount_token0 ... ok
test quoting::mev_resist_pool::tests::test_swap_input_amount_token0 ... ok

The tests demonstrate the additional fee calculation working correctly for both exact input and exact output scenarios.

Overall this is a solid implementation of an interesting MEV resistance mechanism. The issues I've identified are mostly around code quality and maintainability rather than functional correctness.