Struct hotshot::SystemContext

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pub struct SystemContext<TYPES: NodeType, I: NodeImplementation<TYPES>> {
Show 17 fields pub(crate) public_key: TYPES::SignatureKey, pub(crate) private_key: <TYPES::SignatureKey as SignatureKey>::PrivateKey, pub config: HotShotConfig<TYPES::SignatureKey>, pub networks: Arc<Networks<TYPES, I>>, pub memberships: Arc<Memberships<TYPES>>, pub(crate) metrics: Arc<ConsensusMetricsValue>, pub(crate) consensus: Arc<RwLock<Consensus<TYPES>>>, pub(crate) instance_state: Arc<TYPES::InstanceState>, pub(crate) version: Arc<RwLock<Version>>, pub(crate) start_view: TYPES::Time, pub(crate) output_event_stream: (Sender<Event<TYPES>>, InactiveReceiver<Event<TYPES>>), pub(crate) external_event_stream: (Sender<Event<TYPES>>, InactiveReceiver<Event<TYPES>>), pub(crate) anchored_leaf: Leaf<TYPES>, pub(crate) internal_event_stream: (Sender<Arc<HotShotEvent<TYPES>>>, InactiveReceiver<Arc<HotShotEvent<TYPES>>>), pub id: u64, pub storage: Arc<RwLock<I::Storage>>, pub decided_upgrade_certificate: Arc<RwLock<Option<UpgradeCertificate<TYPES>>>>,
}
Expand description

Holds the state needed to participate in HotShot consensus

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§public_key: TYPES::SignatureKey

The public key of this node

§private_key: <TYPES::SignatureKey as SignatureKey>::PrivateKey

The private key of this node

§config: HotShotConfig<TYPES::SignatureKey>

Configuration items for this hotshot instance

§networks: Arc<Networks<TYPES, I>>

Networks used by the instance of hotshot

§memberships: Arc<Memberships<TYPES>>

Memberships used by consensus

§metrics: Arc<ConsensusMetricsValue>

the metrics that the implementor is using.

§consensus: Arc<RwLock<Consensus<TYPES>>>

The hotstuff implementation

§instance_state: Arc<TYPES::InstanceState>

Immutable instance state

§version: Arc<RwLock<Version>>

The network version

§start_view: TYPES::Time

The view to enter when first starting consensus

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

Access to the output event stream.

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

External event stream for communication with the application.

§anchored_leaf: Leaf<TYPES>

Anchored leaf provided by the initializer.

§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

§id: u64

uid for instrumentation

§storage: Arc<RwLock<I::Storage>>

Reference to the internal storage for consensus datum.

§decided_upgrade_certificate: Arc<RwLock<Option<UpgradeCertificate<TYPES>>>>

a potential upgrade certificate that has been decided on by the consensus tasks.

Implementations§

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impl<TYPES: NodeType, I: NodeImplementation<TYPES>> SystemContext<TYPES, I>

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pub fn new( public_key: TYPES::SignatureKey, private_key: <TYPES::SignatureKey as SignatureKey>::PrivateKey, nonce: u64, config: HotShotConfig<TYPES::SignatureKey>, memberships: Memberships<TYPES>, networks: Networks<TYPES, I>, initializer: HotShotInitializer<TYPES>, metrics: ConsensusMetricsValue, storage: I::Storage ) -> Arc<Self>

Creates a new Arc<SystemContext> with the given configuration options.

To do a full initialization, use fn init instead, which will set up background tasks as well.

§Errors
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pub async fn start_consensus(&self)

“Starts” consensus by sending a QcFormed, ViewChange, and ValidatedStateUpdated events

§Panics

Panics if sending genesis fails

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pub(crate) async fn send_external_event(&self, event: Event<TYPES>)

Emit an external event

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pub async fn publish_transaction_async( &self, transaction: TYPES::Transaction, decided_upgrade_certificate: Arc<RwLock<Option<UpgradeCertificate<TYPES>>>> ) -> Result<(), HotShotError<TYPES>>

Publishes a transaction asynchronously to the network.

§Errors

Always returns Ok; does not return an error if the transaction couldn’t be published to the network

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

Returns a copy of the consensus struct

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pub fn instance_state(&self) -> Arc<TYPES::InstanceState>

Returns a copy of the instance state

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

Returns a copy of the last decided leaf

§Panics

Panics if internal leaf for consensus is inconsistent

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

[Non-blocking] instantly returns a copy of the last decided leaf if it is available to be read. If not, we return None.

§Panics

Panics if internal state for consensus is inconsistent

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pub async fn decided_state(&self) -> Arc<TYPES::ValidatedState>

Returns the last decided validated state.

§Panics

Panics if internal state for consensus is inconsistent

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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 init( public_key: TYPES::SignatureKey, private_key: <TYPES::SignatureKey as SignatureKey>::PrivateKey, node_id: u64, config: HotShotConfig<TYPES::SignatureKey>, memberships: Memberships<TYPES>, networks: Networks<TYPES, I>, initializer: HotShotInitializer<TYPES>, metrics: ConsensusMetricsValue, storage: I::Storage ) -> Result<(SystemContextHandle<TYPES, I>, Sender<Arc<HotShotEvent<TYPES>>>, Receiver<Arc<HotShotEvent<TYPES>>>), HotShotError<TYPES>>

Initializes a new SystemContext and does the work of setting up all the background tasks

Assumes networking implementation is already primed.

Underlying HotShot instance starts out paused, and must be unpaused

Upon encountering an unrecoverable error, such as a failure to send to a broadcast channel, the HotShot instance will log the error and shut down.

To construct a SystemContext without setting up tasks, use fn new instead.

§Errors

Can throw an error if Self::new fails.

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pub fn next_view_timeout(&self) -> u64

return the timeout for a view for self

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impl<TYPES: NodeType, I: NodeImplementation<TYPES>> SystemContext<TYPES, I>

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pub async fn run_tasks(&self) -> SystemContextHandle<TYPES, I>

Spawn all tasks that operate on SystemContextHandle.

For a list of which tasks are being spawned, see this module’s documentation.

Trait Implementations§

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impl<TYPES: NodeType, I: NodeImplementation<TYPES>> Clone for SystemContext<TYPES, I>

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fn clone(&self) -> Self

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more

Auto Trait Implementations§

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

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

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

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

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

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

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

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