Struct DigestBatch 

pub struct DigestBatch<'a, P: Digest<'a>> { /* private fields */ }

Prepared states from one selected provider; no state cloning or source replay.

Implementations

impl<'a, P: Digest<'a>> DigestBatch<'a, P>

pub fn prepare<W: Work>( provider: &'a P, identities: OwnedVec<P::Identity>, execution: &W, field: &'static str, at: u64, ) -> Result<Self, DigestError<P::Error>>

Moves resolved identities into the current operation and initializes each once.

Identities must come from this selected provider’s resolver. They are sorted and deduplicated through its fallible semantic comparison, not OID/width equality. Admission precedes every callback, move and allocation. field/at identify the caller’s enclosing original source structure.

pub fn len(&self) -> usize

Number of unique resolved digest states, without rescanning identities.

pub fn is_empty(&self) -> bool

Whether no digest was requested.

pub fn run<S: Source, W: Work>( self, source: &mut S, execution: &W, ) -> Result<DigestMemo<'a, P>, PassError<S::Error, P::Error>>

Feeds the source once; outputs are finalized only after complete successful EOF.

A source or callback error drops every unfinished state and partial output. No partial digest is returned, and a source ignoring a refused write cannot make subsequent callbacks run or turn refusal into success.

pub fn run_requests<S: RequestSource<'a, P>, W: Work>( self, source: &mut S, execution: &W, ) -> PassResult<DigestMemo<'a, P>, S::Error, P::Error>

Completes algorithm-dependent derived inputs, once per distinct full identity. The callback receives the first ORIGINAL request ordinal, preserving the prepare mapping after identity sorting/deduplication.

TS101733 §6.5.1’s PoE preimage is eight hashes under the selected algorithm, so different algorithms cannot share one literal byte stream. All states, sticky stream errors, output widths and finalization use exactly the same kernels as Self::run. No raw-output constructor or unchecked digest/identity pair is exposed.