Crate sc_consensus_epochs

Generic utilities for epoch-based consensus engines.

Modules

• migration
  Migration types for epoch changes.

Structs

• EpochChanges
  Tree of all epoch changes across all seen forks. Data stored in tree is the hash and block number of the block signaling the epoch change, and the epoch that was signalled at that block.
• EpochHeader
  Header of epoch data, consisting of start and end slot.
• EpochIdentifier
  Epoch identifier.
• GapEpochs
  A pair of epochs for the gap block download validation. Block gap is created after the warp sync is complete. Blocks are imported both at the tip of the chain and at the start of the gap. This holds a pair of epochs that are required to validate headers at the start of the gap. Since gap download does not allow forks we don’t need to keep a tree of epochs.
• HeaderBackendDescendentBuilder
  Wrapper to get around unconstrained type errors when implementing IsDescendentOfBuilder for header backends.
• IncrementedEpoch
  A fresh, incremented epoch to import into the underlying fork-tree.

Enums

• EpochIdentifierPosition
  Position of the epoch identifier.
• PersistedEpoch
  Persisted epoch stored in EpochChanges.
• PersistedEpochHeader
  Persisted epoch header stored in ForkTree.
• ViableEpoch
  The viable epoch under which a block can be verified.
• ViableEpochDescriptor
  Descriptor for a viable epoch.

Traits

• Epoch
  Epoch data, distinguish whether it is genesis or not.
• IsDescendentOfBuilder
  A builder for is_descendent_of functions.

Functions

• descendent_query
  Produce a descendent query object given the client.

Type Definitions

• EpochChangesFor
  Type alias to produce the epoch-changes tree from a block type.
• SharedEpochChanges
  A shared epoch changes tree.