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DAG

snarkos_node_bft::helpers::dag

Struct DAG 

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pub struct DAG<N: Network> { /* private fields */ }
Expand description

Maintains a directed acyclic graph (DAG) of certificates, from which we build a totally-ordered blockchain.

The DAG is updated in rounds, where each validator adds at most one new batch. Certificates older than GC are removed, as they are not longer needed.

Invariants:

  • For each entry in graph there is a corresponding certificate ID in recent_committed_ids.
  • last_committed_round, if >0, is equal to the largest key in recent_commit_ids.

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impl<N: Network> DAG<N>

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pub fn new() -> Self

Initializes a new DAG.

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pub const fn graph( &self, ) -> &BTreeMap<u64, HashMap<Address<N>, BatchCertificate<N>>>

Returns the DAG.

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pub const fn last_committed_round(&self) -> u64

Returns the latest round a certificate was committed to.

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pub fn is_recently_committed( &self, round: u64, certificate_id: Field<N>, ) -> bool

Returns true if the given certificate ID was recently committed.

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pub fn contains_certificate_in_round( &self, round: u64, certificate_id: Field<N>, ) -> bool

Returns true if the given certificate ID exists in the given round.

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pub fn get_certificate_for_round_with_author( &self, round: u64, author: Address<N>, ) -> Option<BatchCertificate<N>>

Returns the batch certificate for the given round and author.

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pub fn get_certificate_for_round_with_id( &self, round: u64, certificate_id: Field<N>, ) -> Option<BatchCertificate<N>>

Returns the batch certificate for the given round and certificate ID.

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pub fn get_certificates_for_round( &self, round: u64, ) -> Option<HashMap<Address<N>, BatchCertificate<N>>>

Returns the batch certificates for the given round.

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pub fn insert(&mut self, certificate: BatchCertificate<N>)

Inserts a certificate into the DAG.

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pub fn commit(&mut self, certificate: &BatchCertificate<N>, max_gc_rounds: u64)

Commits a certificate, removing all certificates for this author at or before this round from the DAG.

Trait Implementations§

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impl<N: Debug + Network> Debug for DAG<N>

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

Formats the value using the given formatter. Read more
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impl<N: Network> Default for DAG<N>

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fn default() -> Self

Initializes a new DAG.

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