milksad
/
rust-bitcoin-unsafe-fast
14
0
Fork 0
Code Issues Pull Requests Activity

Remove repeated tap branch hash computing logic

This commit is contained in:
Dr Maxim Orlovsky 2022-03-31 15:21:36 +02:00
parent 1b28375658
commit f3ebfd6f8b
No known key found for this signature in database
GPG Key ID: FFC0250947E5C6F7
1 changed files with 6 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
src/util/taproot.rs
View File

@ -576,16 +576,9 @@ impl NodeInfo {
b_leaf.merkle_branch.push(a.hash)?; // add hashing partner
all_leaves.push(b_leaf);
}
let mut eng = TapBranchHash::engine();
if a.hash < b.hash {
eng.input(&a.hash);
eng.input(&b.hash);
} else {
eng.input(&b.hash);
eng.input(&a.hash);
};
let hash = TapBranchHash::from_node_hashes(a.hash, b.hash);
Ok(Self {
hash: sha256::Hash::from_engine(eng),
hash: sha256::Hash::from_inner(hash.into_inner()),
leaves: all_leaves,
})
}
@ -790,16 +783,11 @@ impl ControlBlock {
let mut curr_hash = TapBranchHash::from_inner(leaf_hash.into_inner());
// Verify the proof
for elem in self.merkle_branch.as_inner() {
let mut eng = TapBranchHash::engine();
if curr_hash.as_inner() < elem.as_inner() {
eng.input(&curr_hash);
eng.input(elem);
} else {
eng.input(elem);
eng.input(&curr_hash);
}
// Recalculate the curr hash as parent hash
curr_hash = TapBranchHash::from_engine(eng);
curr_hash = TapBranchHash::from_node_hashes(
sha256::Hash::from_inner(curr_hash.into_inner()),
*elem
);
}
// compute the taptweak
let tweak = TapTweakHash::from_key_and_tweak(self.internal_key, Some(curr_hash));