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SnapPivotPolicy

reth_snap_sync

Struct SnapPivotPolicy 

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pub struct SnapPivotPolicy { /* private fields */ }
Expand description

Distance and history bounds that decide where a generation is anchored.

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impl SnapPivotPolicy

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pub const fn with_head_distance(self, head_distance: u64) -> Self

Returns this policy anchoring head_distance blocks behind the head.

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pub const fn with_advance_after(self, advance_after: u64) -> Self

Returns this policy re-anchoring once a pivot lags by advance_after blocks.

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pub const fn with_history(self, history: u64) -> Self

Returns this policy assuming history blocks of block access lists remain servable.

Defaults to the full EIP-7928 retention period, since applying lists beats downloading the state again.

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pub const fn pivot_block( &self, head: u64, finalized: Option<u64>, ) -> Option<u64>

Returns the block a pivot anchored under head targets.

Prefers a finalized block that peers still serve state for, since it cannot be reorged, and falls back to the head distance.

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pub const fn needs_advance(&self, generation: SnapGeneration, head: u64) -> bool

Returns whether generation should be re-anchored under head.

Advancing stays far cheaper than restarting, so this triggers well before peers stop serving the old root.

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pub const fn is_catchable(&self, generation: SnapGeneration, head: u64) -> bool

Returns whether the block access lists generation still needs remain servable.

Once they are not, its state cannot be carried forward and the attempt has to restart.

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pub fn select( &self, provider: &impl HeaderProvider, head: u64, finalized: Option<u64>, ) -> Result<Option<SnapGeneration>, SnapSyncError>

Returns a fresh generation for the canonical pivot under head.

A candidate that is not eligible falls back to the head distance; None means no candidate can anchor a sync yet.

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pub const fn is_finishable(&self, generation: SnapGeneration, head: u64) -> bool

Returns whether an interrupted generation is still worth finishing under head.

A fully downloaded generation only needs its trie rebuilt, so it always is.

Trait Implementations§

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impl Clone for SnapPivotPolicy

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fn clone(&self) -> SnapPivotPolicy

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 Copy for SnapPivotPolicy

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impl Debug for SnapPivotPolicy

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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 SnapPivotPolicy

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fn default() -> Self

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

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impl PartialEq for SnapPivotPolicy

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fn eq(&self, other: &SnapPivotPolicy) -> bool

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for SnapPivotPolicy

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🔬This is a nightly-only experimental API. (clone_to_uninit #126799)
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Size: 24 bytes