Struct Bip143PrecomputedHashes 

pub struct Bip143PrecomputedHashes {
    pub hash_prevouts: [u8; 32],
    pub hash_sequence: [u8; 32],
    pub hash_outputs: [u8; 32],
}

Precomputed hash components for BIP143 sighash. These are computed once per transaction and reused for all inputs.

Fields

hash_prevouts: [u8; 32]

SHA256(SHA256(all input prevouts)) - 0 if ANYONECANPAY

hash_sequence: [u8; 32]

SHA256(SHA256(all input sequences)) - 0 if ANYONECANPAY/NONE/SINGLE

hash_outputs: [u8; 32]

SHA256(SHA256(all outputs)) - varies by sighash type

Implementations

impl Bip143PrecomputedHashes

pub fn compute( tx: &Transaction, _prevout_values: &[i64], _prevout_script_pubkeys: &[&[u8]], ) -> Bip143PrecomputedHashes

Compute precomputed hashes for a transaction. This is the expensive part - compute once, reuse for all inputs. Production: uses thread-local buffer to avoid 3 Vec allocs per SegWit tx.

Trait Implementations

impl Clone for Bip143PrecomputedHashes

fn clone(&self) -> Bip143PrecomputedHashes

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Bip143PrecomputedHashes

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.