Struct CacheConfig 

pub struct CacheConfig {
    pub cache_dir: PathBuf,
    pub chain_id: u64,
    pub maintain_addresses: HashSet<Address>,
    pub maintain_slots: HashMap<Address, HashSet<U256>>,
}

Configuration for disk-based caching of EVM state.

Enables on-disk persistence of fetched fork state. Cache files are laid out per chain under cache_dir (see CacheConfig::binary_state_cache_path and the other path helpers), so multiple chains can share one base directory without colliding.

The maintain_* fields drive selective retention when state is reloaded: maintain_addresses whitelists accounts whose storage is kept in full, while maintain_slots whitelists individual slots for accounts whose remaining storage should be purged. Together they let a cache load keep only the long-lived state worth reusing and drop the rest.

Fields

cache_dir: PathBuf

Base directory for cache files.

chain_id: u64

Chain ID for namespace isolation.

maintain_addresses: HashSet<Address>

Addresses whose entire storage is preserved on cache load.

maintain_slots: HashMap<Address, HashSet<U256>>

Addresses with specific slots to preserve (all other slots purged).

Implementations

impl CacheConfig

pub fn new( cache_dir: impl Into<PathBuf>, chain_id: u64, maintain_addresses: HashSet<Address>, maintain_slots: HashMap<Address, HashSet<U256>>, ) -> Self

Create a new cache configuration.

cache_dir is the base directory for all per-chain cache files, chain_id namespaces them, and maintain_addresses / maintain_slots select which state survives a reload (see the type-level docs).

pub fn binary_state_cache_path(&self) -> PathBuf

Get the path for the EVM state cache file (bincode format).

This cache stores the complete EVM state (accounts + storage) in bincode format for fast serialization/deserialization.

Trait Implementations

impl Clone for CacheConfig

fn clone(&self) -> CacheConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CacheConfig

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

Formats the value using the given formatter.