Enum polkadot_node_subsystem::messages::CandidateBackingMessage

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pub enum CandidateBackingMessage {
    GetBackedCandidates(Vec<(CandidateHash, H256)>, Sender<Vec<BackedCandidate>>),
    CanSecond(CanSecondRequest, Sender<bool>),
    Second(H256, CandidateReceipt, PersistedValidationData, PoV),
    Statement(H256, Signed<StatementWithPVD, CompactStatement>),
}
Expand description

Messages received by the Candidate Backing subsystem.

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GetBackedCandidates(Vec<(CandidateHash, H256)>, Sender<Vec<BackedCandidate>>)

Requests a set of backable candidates attested by the subsystem.

Each pair is (candidate_hash, candidate_relay_parent).

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CanSecond(CanSecondRequest, Sender<bool>)

Request the subsystem to check whether it’s allowed to second given candidate. The rule is to only fetch collations that are either built on top of the root of some fragment tree or have a parent node which represents backed candidate.

Always responses with false if async backing is disabled for candidate’s relay parent.

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Second(H256, CandidateReceipt, PersistedValidationData, PoV)

Note that the Candidate Backing subsystem should second the given candidate in the context of the given relay-parent (ref. by hash). This candidate must be validated.

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Statement(H256, Signed<StatementWithPVD, CompactStatement>)

Note a validator’s statement about a particular candidate in the context of the given relay-parent. Disagreements about validity must be escalated to a broader check by the Disputes Subsystem, though that escalation is deferred until the approval voting stage to guarantee availability. Agreements are simply tallied until a quorum is reached.

Trait Implementations§

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impl AssociateOutgoing for CandidateBackingMessage

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type OutgoingMessages = CandidateBackingOutgoingMessages

The associated outgoing messages for a subsystem that consumes the message Self.
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impl Debug for CandidateBackingMessage

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

Formats the value using the given formatter. Read more
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impl From<CandidateBackingMessage> for AllMessages

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fn from(message: CandidateBackingMessage) -> AllMessages

Converts to this type from the input type.
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impl From<CandidateBackingMessage> for CollatorProtocolOutgoingMessages

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fn from(message: CandidateBackingMessage) -> CollatorProtocolOutgoingMessages

Converts to this type from the input type.
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impl From<CandidateBackingMessage> for ProvisionerOutgoingMessages

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fn from(message: CandidateBackingMessage) -> ProvisionerOutgoingMessages

Converts to this type from the input type.
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impl From<CandidateBackingMessage> for StatementDistributionOutgoingMessages

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fn from( message: CandidateBackingMessage ) -> StatementDistributionOutgoingMessages

Converts to this type from the input type.
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impl TryFrom<AllMessages> for CandidateBackingMessage

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type Error = ()

The type returned in the event of a conversion error.
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fn try_from( message: AllMessages ) -> Result<CandidateBackingMessage, <CandidateBackingMessage as TryFrom<AllMessages>>::Error>

Performs the conversion.

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