Struct diem_types::ledger_info::LedgerInfo

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pub struct LedgerInfo { /* private fields */ }
Expand description

This structure serves a dual purpose.

First, if this structure is signed by 2f+1 validators it signifies the state of the ledger at version version – it contains the transaction accumulator at that version which commits to all historical transactions. This structure may be expanded to include other information that is derived from that accumulator (e.g. the current time according to the time contract) to reduce the number of proofs a client must get.

Second, the structure contains a consensus_data_hash value. This is the hash of an internal data structure that represents a block that is voted on in HotStuff. If 2f+1 signatures are gathered on the same ledger info that represents a Quorum Certificate (QC) on the consensus data.

Combining these two concepts, when a validator votes on a block, B it votes for a LedgerInfo with the version being the latest version that will be committed if B gets 2f+1 votes. It sets consensus_data_hash to represent B so that if those 2f+1 votes are gathered a QC is formed on B.

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impl LedgerInfo

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pub fn new(commit_info: BlockInfo, consensus_data_hash: HashValue) -> Self

Constructs a LedgerInfo object based on the given commit info and vote data hash.

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pub fn genesis( genesis_state_root_hash: HashValue, validator_set: ValidatorSet ) -> Self

Create a new LedgerInfo at genesis with the given genesis state and initial validator set.

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pub fn commit_info(&self) -> &BlockInfo

The BlockInfo of a committed block.

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pub fn epoch(&self) -> u64

A series of wrapper functions for the data stored in the commit info. For the detailed information, please refer to BlockInfo

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pub fn next_block_epoch(&self) -> u64

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pub fn round(&self) -> Round

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pub fn consensus_block_id(&self) -> HashValue

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pub fn transaction_accumulator_hash(&self) -> HashValue

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pub fn version(&self) -> Version

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pub fn timestamp_usecs(&self) -> u64

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pub fn next_epoch_state(&self) -> Option<&EpochState>

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pub fn ends_epoch(&self) -> bool

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pub fn consensus_data_hash(&self) -> HashValue

Returns hash of consensus voting data in this LedgerInfo.

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pub fn pivot_decision(&self) -> Option<&PivotBlockDecision>

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pub fn set_consensus_data_hash(&mut self, consensus_data_hash: HashValue)

Trait Implementations§

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impl Clone for LedgerInfo

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fn clone(&self) -> LedgerInfo

Returns a copy 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 CryptoHash for LedgerInfo

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type Hasher = LedgerInfoHasher

The associated Hasher type which comes with a unique salt for this type.
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fn hash(&self) -> HashValue

Hashes the object and produces a HashValue.
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impl Debug for LedgerInfo

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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<'de> Deserialize<'de> for LedgerInfo

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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 Display for LedgerInfo

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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 PartialEq for LedgerInfo

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

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

This method 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 LedgerInfo

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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 TryFrom<&LedgerInfo> for TrustedState

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type Error = Error

The type returned in the event of a conversion error.
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fn try_from(ledger_info: &LedgerInfo) -> Result<Self>

Performs the conversion.
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impl Eq for LedgerInfo

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impl StructuralPartialEq for LedgerInfo

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