Struct ReplayCache 

pub struct ReplayCache { /* private fields */ }

TTL-based replay cache with automatic expiration and O(1) eviction

Uses VecDeque to track insertion order for constant-time removal of oldest entries when the cache reaches capacity, avoiding O(n log n) sorting overhead.

Implementations

impl ReplayCache

pub fn new() -> Self

Create a new replay cache with default settings

Default TTL: 5 minutes (longer than handshake timeout) Default max entries: 10,000

pub fn with_settings(ttl: Duration, max_entries: usize) -> Self

Create a replay cache with custom settings

pub fn is_replay( &mut self, peer_id: &str, nonce: &[u8; 16], timestamp: u64, ) -> bool

Check if a nonce/timestamp combination has been seen recently

Returns true if the combination is a replay (already seen), false if new. Automatically cleans up expired entries during the check.

pub fn stats(&self) -> CacheStats

Get current cache statistics

pub fn clear(&mut self)

Clear all entries (useful for testing or manual cache reset)

Trait Implementations

impl Debug for ReplayCache

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

Formats the value using the given formatter.

impl Default for ReplayCache

fn default() -> Self

Returns the “default value” for a type.