Struct TopicLogSync 

pub struct TopicLogSync<T, S, L, E> {
    pub topic: T,
    pub store: S,
    pub event_tx: Sender<TopicLogSyncEvent<E>>,
    pub live_mode_rx: Option<Receiver<ToSync<Operation<E>>>>,
    pub buffer_capacity: usize,
    pub _phantom: PhantomData<L>,
}

Protocol for synchronizing logs which are associated with a generic T topic.

The mapping of T to a set of logs is handled on the application layer using an implementation of the TopicStore trait.

After sync is complete peers optionally enter “live-mode” where concurrently received and future messages will be sent directly to the application layer and forwarded to any concurrently running sync sessions. As we may receive messages from many sync sessions concurrently, messages forwarded to a sync session in live-mode are de-duplicated in order to avoid flooding the network with redundant data.

It is assumed that the T topic has been negotiated between parties prior to initiating this sync protocol.

Fields

topic: T

store: S

event_tx: Sender<TopicLogSyncEvent<E>>

live_mode_rx: Option<Receiver<ToSync<Operation<E>>>>

buffer_capacity: usize

_phantom: PhantomData<L>

Implementations

impl<T, S, L, E> TopicLogSync<T, S, L, E>

where T: Eq + StdHash + Serialize + for<'a> Deserialize<'a>, S: LogStore<Operation<E>, VerifyingKey, L, SeqNum, Hash> + TopicStore<T, VerifyingKey, L> + Clone + Send + 'static, L: LogId, E: Extensions,

pub fn new( topic: T, store: S, live_mode_rx: Option<Receiver<ToSync<Operation<E>>>>, event_tx: Sender<TopicLogSyncEvent<E>>, ) -> Self

Returns a new sync protocol instance, configured with a store and TopicStore implementation which associates the to-be-synced logs with a given topic.

pub fn new_with_capacity( topic: T, store: S, live_mode_rx: Option<Receiver<ToSync<Operation<E>>>>, event_tx: Sender<TopicLogSyncEvent<E>>, buffer_capacity: usize, ) -> Self

Instantiates a sync protocol with custom buffer capacity.

Trait Implementations

impl<T: Debug, S: Debug, L: Debug, E: Debug> Debug for TopicLogSync<T, S, L, E>

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

Formats the value using the given formatter.

impl<T, S, L, E> Protocol for TopicLogSync<T, S, L, E>

where T: Debug + Eq + StdHash + Serialize + for<'a> Deserialize<'a> + Send + 'static, S: LogStore<Operation<E>, VerifyingKey, L, SeqNum, Hash> + TopicStore<T, VerifyingKey, L> + Clone + Send + 'static, L: LogId + Debug + Send + 'static, E: Extensions + Send + 'static,

type Error = TopicLogSyncError

type Message = TopicLogSyncMessage<L, E>

type Output = ()

async fn run( self, sink: &mut (impl Sink<Self::Message, Error = impl Debug> + Unpin), stream: &mut (impl Stream<Item = Result<Self::Message, impl Debug>> + Unpin), ) -> Result<Self::Output, Self::Error>