Trait NonceStore 

pub trait NonceStore:
    Send
    + Sync
    + 'static {
    // Required method
    fn record_if_unseen<'life0, 'life1, 'async_trait>(
        &'life0 self,
        nonce: &'life1 str,
        expires_at: DateTime<Utc>,
    ) -> Pin<Box<dyn Future<Output = Result<bool, CoolError>> + Send + 'async_trait>>
       where 'life0: 'async_trait,
             'life1: 'async_trait,
             Self: 'async_trait;
}

Tracks the nonces of sealed envelopes that have already been verified inside the clock-skew window, so a captured-and-replayed request gets rejected the second time. Banks running multi-replica deployments back this with Redis so the rejection holds cluster-wide.

Required Methods

fn record_if_unseen<'life0, 'life1, 'async_trait>( &'life0 self, nonce: &'life1 str, expires_at: DateTime<Utc>, ) -> Pin<Box<dyn Future<Output = Result<bool, CoolError>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, Self: 'async_trait,

Attempt to register nonce as seen. Returns Ok(true) if it is the first time we see it (caller may proceed); Ok(false) if it was already recorded (caller should reject). Implementations must drop entries past expires_at to keep the working set bounded.

Implementors

impl NonceStore for InMemoryNonceStore