Struct exonum::messages::Prevote

pub struct Prevote { /* fields omitted */ }

Pre-vote for a new block.

Validation

A node panics if it has already sent a different Prevote for the same round.

Processing

Pre-vote is added to the list of known votes for the same proposal. If locked_round number from the message is bigger than in a node state, then a node replies with RequestPrevotes. If there are unknown transactions in the propose specified by propose_hash, RequestTransactions is sent in reply. Otherwise if all transactions are known and there are +2/3 pre-votes, then a node is locked to that proposal and Precommit is broadcast.

Generation

A node broadcasts Prevote in response to Propose when it has received all the transactions.

Methods

impl Prevote

fn new(
    validator: u16,
    height: u64,
    round: u32,
    propose_hash: &Hash,
    locked_round: u32,
    secret_key: &SecretKey
) -> Prevote

Creates messsage and sign it.

fn new_with_signature(
    validator: u16,
    height: u64,
    round: u32,
    propose_hash: &Hash,
    locked_round: u32,
    signature: &Signature
) -> Prevote

Creates message and appends existing signature.

fn message_id() -> u16

Returns message_id useable for matching.

fn service_id() -> u16

Returns service_id useable for matching.

fn validator(&self) -> u16

The validator id.

fn height(&self) -> u64

The height to which the message is related.

fn round(&self) -> u32

The round to which the message is related.

fn propose_hash(&self) -> &Hash

Hash of the corresponding Propose.

fn locked_round(&self) -> u32

Locked round.

Trait Implementations

impl Clone for Prevote

fn clone(&self) -> Prevote

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl PartialEq for Prevote

fn eq(&self, __arg_0: &Prevote) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &Prevote) -> bool

This method tests for !=.

impl Message for Prevote

fn raw(&self) -> &RawMessage

Returns raw message.

fn hash(&self) -> Hash

Returns hash of the RawMessage.

fn verify_signature(&self, pub_key: &PublicKey) -> bool

Verifies the message using given public key.

impl<'a> SegmentField<'a> for Prevote

fn item_size() -> Offset

size of item fixed part that this Field collect.

fn count(&self) -> Offset

count of items in collection

fn extend_buffer(&self, buffer: &mut Vec<u8>)

extend buffer with this collection

unsafe fn from_buffer(buffer: &'a [u8], from: Offset, count: Offset) -> Self

create collection from buffer

fn check_data(
    buffer: &'a [u8],
    from: CheckedOffset,
    count: CheckedOffset,
    latest_segment: CheckedOffset
) -> Result

check collection data

impl FromRaw for Prevote

fn from_raw(raw: RawMessage) -> Result<Prevote, Error>

Converts the raw message into the specific one.

impl StorageValue for Prevote

fn hash(&self) -> Hash

Returns a hash of the value.

fn into_bytes(self) -> Vec<u8>

Serialize a value into a vector of bytes.

fn from_bytes(value: Cow<[u8]>) -> Self

Deserialize a value from bytes.

impl Debug for Prevote

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

Formats the value using the given formatter.

impl ExonumJson for Prevote

fn deserialize_field<B>(
    value: &Value,
    buffer: &mut B,
    from: Offset,
    to: Offset
) -> Result<(), Box<Error>> where
    B: WriteBufferWrapper, 

write deserialized field in buffer on place.

fn serialize_field(&self) -> Result<Value, Box<Error>>

serialize field as json::Value

impl ExonumJsonDeserialize for Prevote

fn deserialize(value: &Value) -> Result<Self, Box<Error>>

deserialize json value.

impl<'de> Deserialize<'de> for Prevote

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

Deserialize this value from the given Serde deserializer.

impl Serialize for Prevote

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

Serialize this value into the given Serde serializer.

impl VoteMessage for Prevote

fn validator(&self) -> ValidatorId

Return validator if of the message.