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NonFinalizedBlocksListener

zebra_state

Struct NonFinalizedBlocksListener 

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pub struct NonFinalizedBlocksListener(pub Arc<Receiver<(Hash, Arc<Block>)>>);
Expand description

A listener for changes in the non-finalized state.

Tuple Fields§

§0: Arc<Receiver<(Hash, Arc<Block>)>>

Implementations§

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impl NonFinalizedBlocksListener

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async fn take_and_send_blocks<'a>( sender: &Sender<(Hash, Arc<Block>)>, non_finalized_state: &'a NonFinalizedState, take_cond: impl Fn(&&ContextuallyVerifiedBlock) -> bool + Copy + 'a, ) -> Result<(), SendError<(Hash, Arc<Block>)>>

Sends the blocks in non_finalized_state that satisfy take_cond to sender, in ascending height order.

Walks each chain from its tip downwards, taking blocks while take_cond holds and stopping at the first block that fails it, so it sends the blocks a listener hasn’t been sent yet by stopping at the first block it already has.

Returns an error if the receiver has been dropped.

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pub fn spawn( non_finalized_state_receiver: WatchReceiver<NonFinalizedState>, known_chain_tips: HashSet<Hash>, ) -> Self

Spawns a task to listen for changes in the non-finalized state and sends any blocks in the non-finalized state to the caller that have not already been sent.

known_chain_tips holds the hashes of chain tips the caller already has. On the first send only, each non-finalized chain is walked from its tip downwards and blocks are sent until a hash in this set is reached, so any block at or below a known tip on the same chain is skipped. If it is empty, every block currently in the non-finalized state is sent. After the first send, those blocks are already tracked as sent, so later sends only forward blocks that weren’t in the previously seen non-finalized state.

Returns a new instance of NonFinalizedBlocksListener for the caller to listen for new blocks in the non-finalized state.

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pub fn unwrap(self) -> Receiver<(Hash, Arc<Block>)>

Consumes self, unwrapping the inner Arc and returning the non-finalized state change channel receiver.

§Panics

If the Arc has more than one strong reference, this will panic.

Trait Implementations§

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impl Clone for NonFinalizedBlocksListener

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fn clone(&self) -> NonFinalizedBlocksListener

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for NonFinalizedBlocksListener

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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 Eq for NonFinalizedBlocksListener

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impl PartialEq for NonFinalizedBlocksListener

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

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more

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Size: 8 bytes