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StateCache

tempo_transaction_pool::state_cache

Struct StateCache 

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pub(crate) struct StateCache {
    accounts: DashMap<Address, Option<AccountInfo>, DefaultHashBuilder>,
    storage: DashMap<(Address, U256), U256, DefaultHashBuilder>,
    contracts: DashMap<B256, Bytecode, DefaultHashBuilder>,
    account_count: AtomicUsize,
    storage_count: AtomicUsize,
    contract_count: AtomicUsize,
}
Expand description

Concurrent cache of raw state reads anchored to a specific tip.

Transaction validation repeatedly reads the same state (system contract configuration, fee token slots, sender accounts) for every transaction. This cache shares those reads across all concurrent validation calls so only the first access hits the underlying state provider.

The validator replaces the cache whenever a new head block is processed, mirroring the lifecycle of its cached EVM environment.

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§accounts: DashMap<Address, Option<AccountInfo>, DefaultHashBuilder>

Cached basic account info, including non-existent accounts (None).

§storage: DashMap<(Address, U256), U256, DefaultHashBuilder>

Cached storage values keyed by account and slot.

§contracts: DashMap<B256, Bytecode, DefaultHashBuilder>

Cached bytecode keyed by code hash.

§account_count: AtomicUsize

Approximate entry counts for cap enforcement; DashMap::len locks every shard and is too expensive for the insert path. Racing inserts may overshoot the caps slightly.

§storage_count: AtomicUsize§contract_count: AtomicUsize

Implementations§

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impl StateCache

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const MAX_ACCOUNTS: usize

Maximum number of cached accounts.

The caps bound memory if a flood of unique accounts is validated within a single block interval; once reached, additional reads fall through to the state provider.

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const MAX_STORAGE_SLOTS: usize

Maximum number of cached storage slots.

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const MAX_CONTRACTS: usize

Maximum number of cached contracts.

Trait Implementations§

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impl Debug for StateCache

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

Formats the value using the given formatter. Read more
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impl Default for StateCache

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fn default() -> StateCache

Returns the “default value” for a type. Read more

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fn from(t: T) -> T

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impl<TxEnv, T> FromRecoveredTx<&T> for TxEnv
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fn from_recovered_tx(tx: &&T, sender: Address) -> TxEnv

Builds a [TxEnv] from a transaction and a sender address.
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fn from_encoded_tx(tx: &&T, sender: Address, encoded: Bytes) -> TxEnv

Builds a [TxEnv] from a transaction, its sender, and encoded transaction bytes.
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Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 120 bytes