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rust-bitcoin-unsafe-fast
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bip158: Hash data instead of copying first 

Currently we copy data into a new buffer before passing it into the
hasher, we can just hash the data directly.

Internal change only, no external change.

Fix: #2917
This commit is contained in:
Tobin C. Harding 2024-07-04 09:30:36 +10:00
parent db72ea8b32
commit 6d3137ed87
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GPG Key ID: 40BF9E4C269D6607
1 changed files with 5 additions and 5 deletions
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10
bitcoin/src/bip158.rs
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@ -40,7 +40,7 @@
use core::cmp::{self, Ordering};
use core::fmt;
use hashes::{sha256d, siphash24};
use hashes::{sha256d, siphash24, HashEngine as _};
use internals::write_err;
use io::{BufRead, Write};
@ -115,10 +115,10 @@ pub struct BlockFilter {
impl FilterHash {
/// Computes the filter header from a filter hash and previous filter header.
pub fn filter_header(&self, previous_filter_header: FilterHeader) -> FilterHeader {
let mut header_data = [0u8; 64];
header_data[0..32].copy_from_slice(&self[..]);
header_data[32..64].copy_from_slice(&previous_filter_header[..]);
FilterHeader(sha256d::Hash::hash(&header_data))
let mut engine = sha256d::Hash::engine();
engine.input(self.as_ref());
engine.input(previous_filter_header.as_ref());
FilterHeader(sha256d::Hash::from_engine(engine))
}
}