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This commit is contained in:
wborgeaud 2021-10-07 22:41:30 +02:00
parent e531eda576
commit 64d386051b
1 changed files with 3 additions and 4 deletions
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7
src/hash/path_compression.rs
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@ -74,7 +74,7 @@ pub(crate) fn decompress_merkle_proofs<F: RichField>(
.iter()
.map(|p| p.siblings.iter())
.collect::<Vec<_>>();
// Fill the `seen` map from the bottom of the tree to the top.
// Fill the `seen` map from the bottom of the tree to the cap.
for depth in 0..height - cap_height {
for (&i, p) in leaves_indices.iter().zip(siblings.iter_mut()) {
let index = (i + num_leaves) >> depth;
@ -93,14 +93,13 @@ pub(crate) fn decompress_merkle_proofs<F: RichField>(
}
}
// For every index, go up the tree by querying `seen` to get node values.
for (&i, p) in leaves_indices.iter().zip(compressed_proofs) {
for &i in leaves_indices {
let mut decompressed_proof = MerkleProof {
siblings: Vec::new(),
};
let mut index = i + num_leaves;
for _ in 0..height - cap_height {
let sibling_index = index ^ 1;
// dbg!(index, sibling_index);
let h = seen[&sibling_index];
decompressed_proof.siblings.push(h);
index >>= 1;
@ -125,7 +124,7 @@ mod tests {
fn test_path_compression() {
type F = CrandallField;
let h = 10;
let cap_height = 0;
let cap_height = 3;
let vs = (0..1 << h).map(|_| vec![F::rand()]).collect::<Vec<_>>();
let mt = MerkleTree::new(vs.clone(), cap_height);