sc_consensus_subspace::archiver

Struct SegmentHeadersStore

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pub struct SegmentHeadersStore<AS> { /* private fields */ }
Expand description

Persistent storage of segment headers.

It maintains all known segment headers. During sync from DSN it is possible that this data structure contains segment headers that from the point of view of the tip of the current chain are “in the future”. This is expected and must be accounted for in the archiver and other places.

Segment headers are stored in batches (which is more efficient to store and retrieve). Each next batch contains distinct segment headers with monotonically increasing segment indices. During instantiation all previously stored batches will be read and in-memory representation of the whole contents will be created such that queries to this data structure are quick and not involving any disk I/O.

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impl<AS> SegmentHeadersStore<AS>
where AS: AuxStore,

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pub fn new( aux_store: Arc<AS>, confirmation_depth_k: BlockNumber, ) -> Result<Self>

Create new instance

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pub fn last_segment_header(&self) -> Option<SegmentHeader>

Returns last observed segment header

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pub fn max_segment_index(&self) -> Option<SegmentIndex>

Returns last observed segment index

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pub fn add_segment_headers( &self, segment_headers: &[SegmentHeader], ) -> Result<()>

Add segment headers.

Multiple can be inserted for efficiency purposes.

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pub fn get_segment_header( &self, segment_index: SegmentIndex, ) -> Option<SegmentHeader>

Get a single segment header

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pub fn segment_headers_for_block( &self, block_number: BlockNumber, ) -> Vec<SegmentHeader>

Get segment headers that are expected to be included at specified block number.

Trait Implementations§

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impl<AS> Clone for SegmentHeadersStore<AS>

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<AS: Debug> Debug for SegmentHeadersStore<AS>

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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<AS> Freeze for SegmentHeadersStore<AS>

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impl<AS> !RefUnwindSafe for SegmentHeadersStore<AS>

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impl<AS> Send for SegmentHeadersStore<AS>
where AS: Sync + Send,

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impl<AS> Sync for SegmentHeadersStore<AS>
where AS: Sync + Send,

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impl<AS> Unpin for SegmentHeadersStore<AS>

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impl<AS> !UnwindSafe for SegmentHeadersStore<AS>

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