Struct ImmutableDataCache 

pub struct ImmutableDataCache {
    pub token_decimals: HashMap<Address, u8>,
}

Cache for immutable on-chain data that doesn’t change between blocks.

This includes:

• Token decimals (ERC20 decimals are immutable)

By caching this data, we avoid redundant RPC calls across block changes and process restarts.

Fields

token_decimals: HashMap<Address, u8>

Token address -> decimals

Implementations

impl ImmutableDataCache

pub fn load(path: &Path) -> Option<Self>

Load immutable data cache from disk (binary format).

Returns None if path cannot be read, fails the magic/version check, or the payload is not valid bincode for this type. Callers should treat None as “no cache yet” and start fresh.

pub fn save(&self, path: &Path) -> Result<(), PersistenceError>

Save immutable data cache to disk (binary format).

Creates the parent directory if it does not exist, then writes the bincode-serialized cache to path.

Errors

Returns an error if the parent directory cannot be created, if bincode serialization fails, or if writing the file fails.

pub fn get_token_decimals(&self, token: Address) -> Option<u8>

Get cached token decimals.

pub fn set_token_decimals(&mut self, token: Address, decimals: u8)

Cache token decimals.

pub fn is_empty(&self) -> bool

Check if the cache is empty.

pub fn len(&self) -> usize

Get the total number of cached entries.

Trait Implementations

impl Clone for ImmutableDataCache

fn clone(&self) -> ImmutableDataCache

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ImmutableDataCache

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

Formats the value using the given formatter.

impl Default for ImmutableDataCache

fn default() -> ImmutableDataCache

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ImmutableDataCache

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ImmutableDataCache

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.