Struct InMemoryConsumedEnvelopeLedger 

pub struct InMemoryConsumedEnvelopeLedger { /* private fields */ }

The single-process ledger: a set. Exists so the obligation is testable here and so a caller with one process needs no ceremony; anything distributed brings its own implementation of the trait.

Trait Implementations

impl ConsumedEnvelopeLedger for InMemoryConsumedEnvelopeLedger

fn spend(&mut self, envelope_id: &str) -> bool

Records envelope_id as spent iff it was not already; returns whether this call was the one that spent it. One atomic question, because separate “seen?” and “record!” calls are a check-then-act race — two concurrent presentations would both pass the check.

impl Debug for InMemoryConsumedEnvelopeLedger

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

Formats the value using the given formatter.

impl Default for InMemoryConsumedEnvelopeLedger

fn default() -> Self

Returns the “default value” for a type.