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Fix log2 precision loss #75

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merged 1 commit into from
Mar 11, 2024
Merged

Fix log2 precision loss #75

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8 changes: 6 additions & 2 deletions lightclient-circuits/src/ssz_merkle.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -37,8 +37,12 @@ pub fn ssz_merkleize_chunks<F: Field, CircuitBuilder: CommonCircuitBuilder<F>>(
MAX_INPUT_LEAFS_NOT_POW2
);

let len_even = chunks.len() + chunks.len() % 2;
let height = (len_even as f64).log2().ceil() as usize;
let height = if chunks.len() == 1 {
1
} else {
chunks.len().next_power_of_two().ilog2() as usize
};

for depth in 0..height {
// Pad to even length using 32 zero bytes assigned as constants.
let len_even = chunks.len() + chunks.len() % 2;
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