Struct FilterPersistence 

pub struct FilterPersistence { /* private fields */ }

Cuckoo filter persistence manager.

Stores and retrieves filter state from SQLite for fast startup.

Implementations

impl FilterPersistence

pub async fn new(sqlite_path: &str) -> Result<Self, StorageError>

Create a new filter persistence manager.

Uses the same SQLite file as the WAL for simplicity.

pub fn from_pool(pool: AnyPool) -> Self

Create from existing pool (share with WAL).

pub async fn save( &self, filter_id: &str, filter_bytes: &[u8], merkle_root: &[u8; 32], entry_count: usize, ) -> Result<(), StorageError>

Save filter state with current merkle root.

pub async fn load( &self, filter_id: &str, ) -> Result<Option<SavedFilterState>, StorageError>

Load filter state if it exists.

pub async fn delete(&self, filter_id: &str) -> Result<(), StorageError>

Delete saved filter state.

pub async fn is_filter_current( &self, filter_id: &str, current_root: &[u8; 32], ) -> Result<bool, StorageError>

Check if a saved filter matches the current merkle root.

If it matches, the filter can be trusted immediately.