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VoteValue

linera_chain::data_types

Struct VoteValue 

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pub struct VoteValue(/* private fields */);
Expand description

The value a validator signs when voting: the value hash, round, certificate kind, the unlocking round (for ValidatedBlock votes), the first-round attestation (for ConfirmedBlock votes), and the justification commitment.

The unlocking round is the consensus device behind fault attributability: by signing it, a validator asserts “I have not voted to confirm a block other than this one in any round at or above the unlocking round”. None means an unlocking round of 0, i.e. the strongest claim (“…in any round”), and is used for freshly proposed blocks and for ConfirmedBlock/Timeout votes, which carry no unlocking round.

The bool is the first-round attestation: it is true only when a ConfirmedBlock vote confirms a block in the chain’s first round, and is always false for ValidatedBlock and Timeout votes.

The final hash is the justification commitment: the hash of the quorum this vote cites (see CommittedQuorum), which transitively commits to the whole justification chain below it. By signing it, the voter attests that they verified the cited quorum, so certificates are verified by checking only their top quorum’s signatures. A ValidatedBlock vote cites the quorum that justifies its unlocking round (None for a fresh proposal); a ConfirmedBlock vote cites the quorum that validated the block in the same round (None when confirming in the chain’s first round); Timeout votes cite nothing.

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impl Clone for VoteValue

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fn clone(&self) -> VoteValue

Returns a duplicate 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 Debug for VoteValue

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for VoteValue

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Hash for VoteValue

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for VoteValue

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fn eq(&self, other: &VoteValue) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for VoteValue

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl BcsSignable<'_> for VoteValue

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impl Eq for VoteValue

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impl StructuralPartialEq for VoteValue

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The archived version of the pointer metadata for this type.
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fn get_hash<H, B>(value: &H, build_hasher: &B) -> u64
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🔬This is a nightly-only experimental API. (clone_to_uninit)
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