Crate sp_consensus_babe

Primitives for BABE.

Modules

• digests
  Private implementation details of BABE digests.
• inherents
  Inherents for BABE

Structs

• BabeConfiguration
  Configuration data used by the BABE consensus engine.
• BabeConfigurationV1
  Configuration data used by the BABE consensus engine.
• BabeEpochConfiguration
  Configuration data used by the BABE consensus engine that may change with epochs.
• Epoch
  BABE epoch information
• OpaqueKeyOwnershipProof
  An opaque type used to represent the key ownership proof at the runtime API boundary. The inner value is an encoded representation of the actual key ownership proof which will be parameterized when defining the runtime. At the runtime API boundary this type is unknown and as such we keep this opaque representation, implementors of the runtime API will have to make sure that all usages of OpaqueKeyOwnershipProof refer to the same type.
• Slot
  Unit type wrapper that represents a slot.
• SlotDuration
  A slot duration defined in milliseconds.
• VrfPreOutput
  VRF pre-output type suitable for schnorrkel operations.
• VrfProof
  VRF proof type suitable for schnorrkel operations.
• VrfSignData
  VRF input ready to be used for VRF sign and verify operations.
• VrfSignature
  VRF signature data
• VrfTranscript
  Transcript ready to be used for VRF related operations.

Enums

• AllowedSlots
  Types of allowed slots.
• ConsensusLog
  An consensus log item for BABE.

Constants

• BABE_ENGINE_ID
  The ConsensusEngineId of BABE.
• KEY_TYPE
  Key type for BABE module.
• MEDIAN_ALGORITHM_CARDINALITY
  How many blocks to wait before running the median algorithm for relative time This will not vary from chain to chain as it is not dependent on slot duration or epoch length.
• PUBLIC_KEY_LENGTH
  The length of the public key
• RANDOMNESS_LENGTH
  VRF output length for per-slot randomness.
• RANDOMNESS_VRF_CONTEXT
  VRF context used for per-slot randomness generation.

Traits

• BabeApi
  API necessary for block authorship with BABE.

Functions

• check_equivocation_proof
  Verifies the equivocation proof by making sure that: both headers have different hashes, are targeting the same slot, and have valid signatures by the same authority.
• epoch_index
  Returns the epoch index the given slot belongs to.
• epoch_start_slot
  Returns the first slot at the given epoch index.
• make_vrf_sign_data
  Make VRF signing data suitable for BABE’s protocol.
• make_vrf_transcript
  Make VRF input suitable for BABE’s randomness generation.

Type Aliases

• AuthorityId
  A Babe authority identifier. Necessarily equivalent to the schnorrkel public key used in the main Babe module. If that ever changes, then this must, too.
• AuthorityIndex
  The index of an authority.
• AuthorityPair
  A Babe authority keypair. Necessarily equivalent to the schnorrkel public key used in the main Babe module. If that ever changes, then this must, too.
• AuthoritySignature
  A Babe authority signature.
• BabeAuthorityWeight
  The weight of an authority.
• BabeBlockWeight
  The cumulative weight of a BABE block, i.e. sum of block weights starting at this block until the genesis block.
• EquivocationProof
  An equivocation proof for multiple block authorships on the same slot (i.e. double vote).
• Randomness
  Randomness type required by BABE operations.
• VrfInput
  VRF input.