pub struct SystemContextHandle<TYPES: NodeType, I: NodeImplementation<TYPES>> {
    pub(crate) output_event_stream: (Sender<Event<TYPES>>, InactiveReceiver<Event<TYPES>>),
    pub(crate) internal_event_stream: (Sender<Arc<HotShotEvent<TYPES>>>, InactiveReceiver<Arc<HotShotEvent<TYPES>>>),
    pub(crate) consensus_registry: ConsensusTaskRegistry<HotShotEvent<TYPES>>,
    pub(crate) network_registry: NetworkTaskRegistry,
    pub hotshot: Arc<SystemContext<TYPES, I>>,
    pub(crate) storage: Arc<RwLock<I::Storage>>,
    pub network: Arc<I::Network>,
    pub memberships: Arc<Memberships<TYPES>>,
}
Expand description

Event streaming handle for a SystemContext instance running in the background

This type provides the means to message and interact with a background SystemContext instance, allowing the ability to receive Events from it, send transactions to it, and interact with the underlying storage.

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§output_event_stream: (Sender<Event<TYPES>>, InactiveReceiver<Event<TYPES>>)

The sender and receiver, to allow the application to communicate with HotShot.

§internal_event_stream: (Sender<Arc<HotShotEvent<TYPES>>>, InactiveReceiver<Arc<HotShotEvent<TYPES>>>)

access to the internal event stream, in case we need to, say, shut something down

§consensus_registry: ConsensusTaskRegistry<HotShotEvent<TYPES>>

registry for controlling consensus tasks

§network_registry: NetworkTaskRegistry

registry for controlling network tasks

§hotshot: Arc<SystemContext<TYPES, I>>

Internal reference to the underlying SystemContext

§storage: Arc<RwLock<I::Storage>>

Reference to the internal storage for consensus datum.

§network: Arc<I::Network>

Networks used by the instance of hotshot

§memberships: Arc<Memberships<TYPES>>

Memberships used by consensus

Implementations§

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impl<TYPES: NodeType, I: NodeImplementation<TYPES> + 'static> SystemContextHandle<TYPES, I>

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pub fn add_task<S: TaskState<Event = HotShotEvent<TYPES>> + 'static>( &mut self, task_state: S )

Adds a hotshot consensus-related task to the SystemContextHandle.

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pub fn event_stream(&self) -> impl Stream<Item = Event<TYPES>>

obtains a stream to expose to the user

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pub fn event_stream_known_impl(&self) -> Receiver<Event<TYPES>>

HACK so we can know the types when running tests… there are two cleaner solutions:

  • make the stream generic and in nodetypes or nodeimpelmentation
  • type wrapper
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pub fn internal_event_stream_known_impl( &self ) -> Receiver<Arc<HotShotEvent<TYPES>>>

HACK so we can know the types when running tests… there are two cleaner solutions:

  • make the stream generic and in nodetypes or nodeimpelmentation
  • type wrapper NOTE: this is only used for sanity checks in our tests
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pub async fn decided_state(&self) -> Arc<TYPES::ValidatedState>

Get the last decided validated state of the SystemContext instance.

§Panics

If the internal consensus is in an inconsistent state.

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pub async fn state( &self, view: TYPES::Time ) -> Option<Arc<TYPES::ValidatedState>>

Get the validated state from a given view.

Returns the requested state, if the SystemContext is tracking this view. Consensus tracks views that have not yet been decided but could be in the future. This function may return None if the requested view has already been decided (but see decided_state) or if there is no path for the requested view to ever be decided.

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pub async fn decided_leaf(&self) -> Leaf<TYPES>

Get the last decided leaf of the SystemContext instance.

§Panics

If the internal consensus is in an inconsistent state.

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pub fn try_decided_leaf(&self) -> Option<Leaf<TYPES>>

Tries to get the most recent decided leaf, returning instantly if we can’t acquire the lock.

§Panics

Panics if internal consensus is in an inconsistent state.

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pub async fn submit_transaction( &self, tx: TYPES::Transaction ) -> Result<(), HotShotError<TYPES>>

Submits a transaction to the backing SystemContext instance.

The current node broadcasts the transaction to all nodes on the network.

§Errors

Will return a HotShotError if some error occurs in the underlying SystemContext instance.

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pub fn consensus(&self) -> Arc<RwLock<Consensus<TYPES>>>

Get the underlying consensus state for this SystemContext

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pub async fn shut_down(&mut self)

Shut down the the inner hotshot and wait until all background threads are closed.

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pub fn next_view_timeout(&self) -> u64

return the timeout for a view of the underlying SystemContext

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pub async fn leader(&self, view_number: TYPES::Time) -> TYPES::SignatureKey

Wrapper for HotShotConsensusApi’s leader function

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pub fn public_key(&self) -> TYPES::SignatureKey

Wrapper to get this node’s public key

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pub async fn cur_view(&self) -> TYPES::Time

Wrapper to get the view number this node is on.

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pub fn storage(&self) -> Arc<RwLock<I::Storage>>

Provides a reference to the underlying storage for this SystemContext, allowing access to historical data

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pub fn spawn_initial_timeout_task(&self) -> JoinHandle<()>

A helper function to spawn the initial timeout task from a given SystemContextHandle.

Trait Implementations§

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impl<TYPES: NodeType, I: NodeImplementation<TYPES>> ConsensusApi<TYPES, I> for SystemContextHandle<TYPES, I>

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fn total_nodes(&self) -> NonZeroUsize

Total number of nodes in the network. Also known as n.
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fn builder_timeout(&self) -> Duration

The maximum amount of time a leader can wait to get a block from a builder.
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fn send_event<'life0, 'async_trait>( &'life0 self, event: Event<TYPES> ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Notify the system of an event within hotshot-consensus.
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fn public_key(&self) -> &TYPES::SignatureKey

Get a reference to the public key.
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fn private_key(&self) -> &<TYPES::SignatureKey as SignatureKey>::PrivateKey

Get a reference to the private key.

Auto Trait Implementations§

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impl<TYPES, I> Freeze for SystemContextHandle<TYPES, I>

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impl<TYPES, I> !RefUnwindSafe for SystemContextHandle<TYPES, I>

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impl<TYPES, I> Send for SystemContextHandle<TYPES, I>

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impl<TYPES, I> Sync for SystemContextHandle<TYPES, I>

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impl<TYPES, I> Unpin for SystemContextHandle<TYPES, I>

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impl<TYPES, I> !UnwindSafe for SystemContextHandle<TYPES, I>

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Change the background color to black
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Change the background color to red
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Change the background color to green
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Change the background color to yellow
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Change the background color to magenta
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Change the background color to purple
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Change the background color to cyan
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Change the foreground color to white
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Change the background color to white
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Change the foreground color to the terminal default
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Change the background color to the terminal default
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Change the foreground color to bright black
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Change the background color to bright black
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Change the foreground color to bright red
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Change the background color to bright red
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Change the foreground color to bright green
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Change the background color to bright green
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Change the foreground color to bright yellow
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Change the background color to bright yellow
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Change the foreground color to bright blue
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Change the background color to bright blue
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Change the foreground color to bright magenta
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Change the background color to bright magenta
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Change the foreground color to bright purple
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Change the background color to bright purple
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Change the foreground color to bright cyan
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Change the background color to bright cyan
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Change the foreground color to bright white
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Change the background color to bright white
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Make the text bold
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Make the text dim
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Make the text italicized
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Swap the foreground and background colors
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Hide the text
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Set the foreground color to a specific RGB value.
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Set the background color to a specific RGB value.
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Sets the foreground color to an RGB value.
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Apply a runtime-determined style
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more