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LazyOverlay

reth_chain_state

Struct LazyOverlay 

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pub struct LazyOverlay<N: NodePrimitives = EthPrimitives> { /* private fields */ }
Expand description

Lazily computed trie overlay.

Captures the inputs needed to compute a TrieInputSorted and defers the actual computation until first access.

Blocks must be provided in reverse chain order (newest to oldest), so the first block is the chain tip and the last block is the oldest in-memory block in the chain segment.

§Fast Path vs Slow Path

  • Fast path: If the tip block’s cached anchored_trie_input is ready and its anchor_hash matches our expected anchor, we can reuse it directly (O(1)).
  • Slow path: Otherwise, we merge all ancestor blocks’ trie data into a new overlay.

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impl<N: NodePrimitives> LazyOverlay<N>

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pub fn new(blocks: Vec<ExecutedBlock<N>>) -> Self

Create a new lazy overlay from in-memory blocks.

§Arguments
  • blocks - Executed blocks in reverse chain order (newest to oldest)
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pub const fn num_blocks(&self) -> usize

Returns the number of in-memory blocks this overlay covers.

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pub fn anchor_hash(&self) -> Option<B256>

Returns the oldest anchor hash this overlay can serve.

This is the parent hash of the oldest block in the stored newest-to-oldest chain segment.

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pub fn has_anchor_hash(&self, hash: B256) -> bool

Returns true if there are no blocks in the overlay, or if one of the blocks has the given hash as a parent hash.

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pub fn get(&self, anchor_hash: B256) -> Arc<TrieInputSorted>

Returns the computed trie input for the requested anchor, computing it if necessary.

The first call triggers computation (which may block waiting for deferred data). Subsequent calls for the same anchor return the cached result immediately.

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pub fn as_overlay( &self, anchor_hash: B256, ) -> (Arc<TrieUpdatesSorted>, Arc<HashedPostStateSorted>)

Returns the overlay as (nodes, state) tuple for use with OverlayStateProviderFactory.

Trait Implementations§

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impl<N: Clone + NodePrimitives> Clone for LazyOverlay<N>

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fn clone(&self) -> LazyOverlay<N>

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl<N: NodePrimitives> Debug for LazyOverlay<N>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<N> Freeze for LazyOverlay<N>

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impl<N = EthPrimitives> !RefUnwindSafe for LazyOverlay<N>

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impl<N> Send for LazyOverlay<N>

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impl<N> Sync for LazyOverlay<N>

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impl<N> Unpin for LazyOverlay<N>

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impl<N> UnsafeUnpin for LazyOverlay<N>

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impl<N = EthPrimitives> !UnwindSafe for LazyOverlay<N>

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🔬This is a nightly-only experimental API. (clone_to_uninit #126799)
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Size: 32 bytes