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SnapSyncSession

reth_snap_sync

Struct SnapSyncSession 

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

One snap synchronization attempt, from the pivot it targets to the work it owns.

Targets come from the local chain, never from a peer: peers only supply state, which is authenticated against the target’s state root.

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impl SnapSyncSession

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pub fn new(policy: SnapPivotPolicy) -> Self

Creates a session waiting for its first eligible target.

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pub const fn state(&self) -> &SnapSyncSessionState

What the session is doing.

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pub const fn target(&self) -> Option<&SnapGeneration>

Pivot this session is anchored to, if it has one.

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pub fn is_cancelled(&self) -> bool

Returns whether this session has been cancelled.

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

Selects a target under head, or waits while no block is eligible.

A target no work has taken yet is replaced by a newer eligible one and dropped when none is eligible, since nothing authenticates against its root so far. Moving a target that work has taken is instead pivot advancement, which has to carry the downloaded state forward.

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pub fn start(&mut self) -> Option<(SnapGeneration, CancellationToken)>

Hands the selected target, and the token to watch, to the work downloading against it.

Taking the target is what starts it, so only the first caller gets one: a target already being downloaded has an owner, and a waiting or cancelled session has nothing to hand out.

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pub fn cancel(&mut self)

Signals outstanding work to stop and ends the session.

Terminal: a later attempt needs a new session.

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impl Debug for SnapSyncSession

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

Formats the value using the given formatter. Read more

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Size: 120 bytes