Struct zebra_state::service::chain_tip::ChainTipChange
source · [−]pub struct ChainTipChange {
latest_chain_tip: LatestChainTip,
last_change_hash: Option<Hash>,
network: Network,
}
Expand description
A chain tip change monitor.
Awaits changes and resets of the state’s best chain tip,
returning the latest TipAction
once the state is updated.
Each cloned instance separately tracks the last block data it provided. If
the best chain fork has changed since the last tip change on that instance,
it returns a Reset
.
The chain tip data is based on:
- the best non-finalized chain tip, if available, or
- the finalized tip.
Fields
latest_chain_tip: LatestChainTip
The receiver for the current chain tip’s data.
last_change_hash: Option<Hash>
The most recent block::Hash
provided by this instance.
Note
If the best chain fork has changed, or some blocks have been skipped,
this hash will be different to the last returned ChainTipBlock.hash
.
network: Network
The network for the chain tip.
Implementations
sourceimpl ChainTipChange
impl ChainTipChange
sourcepub async fn wait_for_tip_change(&mut self) -> Result<TipAction, RecvError>
pub async fn wait_for_tip_change(&mut self) -> Result<TipAction, RecvError>
Wait until the tip has changed, then return the corresponding TipAction
.
The returned action describes how the tip has changed since the last call to this method.
If there have been no changes since the last time this method was called, it waits for the next tip change before returning.
If there have been multiple changes since the last time this method was called,
they are combined into a single TipAction::Reset
.
Returns an error if communication with the state is lost.
Note
If a lot of blocks are committed at the same time,
the change will skip some blocks, and return a Reset
.
sourcepub fn last_tip_change(&mut self) -> Option<TipAction>
pub fn last_tip_change(&mut self) -> Option<TipAction>
Returns:
Some(
TipAction
)
if there has been a change since the last time the method was called.None
if there has been no change.
See Self::wait_for_tip_change
for details.
sourcefn action(&self, block: ChainTipBlock) -> TipAction
fn action(&self, block: ChainTipBlock) -> TipAction
Return an action based on block
and the last change we returned.
sourcefn new(latest_chain_tip: LatestChainTip, network: Network) -> Self
fn new(latest_chain_tip: LatestChainTip, network: Network) -> Self
Create a new ChainTipChange
from a LatestChainTip
receiver and Network
.
sourceasync fn tip_block_change(&mut self) -> Result<ChainTipBlock, RecvError>
async fn tip_block_change(&mut self) -> Result<ChainTipBlock, RecvError>
Wait until the next chain tip change, then return the corresponding ChainTipBlock
.
Returns an error if communication with the state is lost.
Trait Implementations
sourceimpl Clone for ChainTipChange
impl Clone for ChainTipChange
Auto Trait Implementations
impl !RefUnwindSafe for ChainTipChange
impl Send for ChainTipChange
impl Sync for ChainTipChange
impl Unpin for ChainTipChange
impl !UnwindSafe for ChainTipChange
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WithDispatch
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sourcefn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
sourceimpl<T> WithSubscriber for T
impl<T> WithSubscriber for T
sourcefn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
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
sourcefn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more