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rust-bitcoin-unsafe-fast
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impl Encodable for Annex to avoid allocation

This commit is contained in:
Riccardo Casatta 2021-07-16 15:05:15 +02:00
parent 1a7afed068
commit 2b3b22f559
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GPG Key ID: FD986A969E450397
2 changed files with 9 additions and 3 deletions
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2
src/consensus/encode.rs
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@ -600,7 +600,7 @@ impl_vec!(u64);
#[cfg(feature = "std")] impl_vec!((u32, Address));
#[cfg(feature = "std")] impl_vec!(AddrV2Message);
fn consensus_encode_with_size<S: io::Write>(data: &[u8], mut s: S) -> Result<usize, io::Error> {
pub(crate) fn consensus_encode_with_size<S: io::Write>(data: &[u8], mut s: S) -> Result<usize, io::Error> {
let vi_len = VarInt(data.len() as u64).consensus_encode(&mut s)?;
s.emit_slice(&data)?;
Ok(vi_len + data.len())

10
src/util/sighash.rs
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@ -20,7 +20,7 @@
//!
pub use blockdata::transaction::SigHashType as LegacySigHashType;
use consensus::Encodable;
use consensus::{encode, Encodable};
use core::fmt;
use core::ops::{Deref, DerefMut};
use hashes::{sha256, sha256d, Hash};
@ -344,7 +344,7 @@ impl<R: Deref<Target = Transaction>> SigHashCache<R> {
// includes the mandatory 0x50 prefix.
if let Some(annex) = annex {
let mut enc = sha256::Hash::engine();
annex.as_bytes().to_vec().consensus_encode(&mut enc)?;
annex.consensus_encode(&mut enc)?;
let hash = sha256::Hash::from_engine(enc);
hash.consensus_encode(&mut writer)?;
}
@ -626,6 +626,12 @@ impl<'a> Annex<'a> {
}
}
impl<'a> Encodable for Annex<'a> {
fn consensus_encode<W: io::Write>(&self, writer: W) -> Result<usize, io::Error> {
encode::consensus_encode_with_size(&self.0, writer)
}
}
#[cfg(test)]
mod tests {
use consensus::deserialize;