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StrictEpochSnapshot

hotshot_example_types::membership::strict_membership

Struct StrictEpochSnapshot 

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pub struct StrictEpochSnapshot<T, S>
where
    T: NodeType,
    S: TestStakeTable<T::SignatureKey, T::StateSignatureKey>,
{
    epoch: EpochNumber,
    first_epoch: Option<EpochNumber>,
    has_drb: bool,
    stake_table: Vec<PeerConfig<T>>,
    da_stake_table: Vec<PeerConfig<T>>,
    committee_keys: Vec<T::SignatureKey>,
    da_committee_keys: Vec<T::SignatureKey>,
    table: S,
    _phantom: PhantomData<T>,
}
Expand description

Per-epoch snapshot for StrictMembership.

Materializes the stake-table views at construction time so accessors can return borrowed iterators.

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§epoch: EpochNumber§first_epoch: Option<EpochNumber>§has_drb: bool§stake_table: Vec<PeerConfig<T>>§da_stake_table: Vec<PeerConfig<T>>§committee_keys: Vec<T::SignatureKey>§da_committee_keys: Vec<T::SignatureKey>§table: S§_phantom: PhantomData<T>

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impl<T, S> StrictEpochSnapshot<T, S>
where T: NodeType, S: TestStakeTable<T::SignatureKey, T::StateSignatureKey>,

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fn build( epoch: EpochNumber, first_epoch: Option<EpochNumber>, has_drb: bool, table: S, ) -> Self

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impl<T, S> Clone for StrictEpochSnapshot<T, S>
where T: NodeType, S: TestStakeTable<T::SignatureKey, T::StateSignatureKey>,

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fn clone(&self) -> Self

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<T, S> Debug for StrictEpochSnapshot<T, S>
where T: NodeType, S: TestStakeTable<T::SignatureKey, T::StateSignatureKey>,

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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<T, S> MembershipSnapshot<T> for StrictEpochSnapshot<T, S>
where T: NodeType, S: TestStakeTable<T::SignatureKey, T::StateSignatureKey>,

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type Error = StrictMembershipError

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type StakeTableHash = NoStakeTableHash

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fn epoch(&self) -> EpochNumber

The epoch this snapshot is bound to.
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fn first_epoch(&self) -> Option<EpochNumber>

The first epoch known to the membership (cached at snapshot creation).
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fn has_drb(&self) -> bool

Whether a randomized stake table (DRB result) was available for this epoch at the time the snapshot was captured.
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fn stake_table(&self) -> impl ExactSizeIterator<Item = &PeerConfig<T>> + Send

The (non-DA) stake table for this epoch. Read more
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fn da_stake_table(&self) -> impl ExactSizeIterator<Item = &PeerConfig<T>> + Send

The DA stake table for this epoch.
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fn committee_members( &self, _: ViewNumber, ) -> impl ExactSizeIterator<Item = &T::SignatureKey> + Send

The set of public keys with stake in this epoch, in stake-table order.
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fn da_committee_members( &self, _: ViewNumber, ) -> impl ExactSizeIterator<Item = &T::SignatureKey> + Send

The set of public keys in the DA committee for this epoch.
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fn stake(&self, key: &T::SignatureKey) -> Option<PeerConfig<T>>

The stake-table entry for key, or None if the key is not in the committee for this epoch.
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fn da_stake(&self, key: &T::SignatureKey) -> Option<PeerConfig<T>>

The DA stake-table entry for key, or None.
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fn has_stake(&self, key: &T::SignatureKey) -> bool

Whether key has stake in this epoch.
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fn has_da_stake(&self, key: &T::SignatureKey) -> bool

Whether key has DA stake in this epoch.
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fn lookup_leader( &self, view: ViewNumber, ) -> Result<T::SignatureKey, Self::Error>

The leader for view in this epoch. Read more
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fn stake_table_hash(&self) -> Option<Commitment<Self::StakeTableHash>>

The commitment of the stake table for this epoch, if available.
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fn total_nodes(&self) -> usize

Number of members in this epoch’s stake table.
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fn da_total_nodes(&self) -> usize

Number of members in this epoch’s DA committee.
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fn total_stake(&self) -> Uint<256, 4>

Sum of all stake in this epoch.
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fn total_da_stake(&self) -> Uint<256, 4>

Sum of all DA stake in this epoch.
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fn success_threshold(&self) -> Uint<256, 4>

Quorum (supermajority) threshold for this epoch.
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fn da_success_threshold(&self) -> Uint<256, 4>

DA quorum threshold for this epoch.
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fn failure_threshold(&self) -> Uint<256, 4>

Failure threshold (1/3 + 1) for this epoch.
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fn upgrade_threshold(&self) -> Uint<256, 4>

Threshold required for a protocol upgrade.
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fn leader( &self, view: ViewNumber, ) -> Result<<T as NodeType>::SignatureKey, Error>

The leader for view in this epoch, returning a HotShot-internal error type. Default impl wraps Self::lookup_leader.

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