Struct polkadot_service::LongestChain
source · pub struct LongestChain<B, Block> { /* private fields */ }
Expand description
Implement Longest Chain Select implementation where ‘longest’ is defined as the highest number of blocks
Implementations§
source§impl<B, Block> LongestChain<B, Block>
impl<B, Block> LongestChain<B, Block>
sourcepub fn new(backend: Arc<B>) -> LongestChain<B, Block>
pub fn new(backend: Arc<B>) -> LongestChain<B, Block>
Instantiate a new LongestChain for Backend B
Trait Implementations§
source§impl<B, Block> Clone for LongestChain<B, Block>
impl<B, Block> Clone for LongestChain<B, Block>
source§fn clone(&self) -> LongestChain<B, Block>
fn clone(&self) -> LongestChain<B, Block>
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl<B, Block> SelectChain<Block> for LongestChain<B, Block>
impl<B, Block> SelectChain<Block> for LongestChain<B, Block>
source§fn leaves<'life0, 'async_trait>(
&'life0 self,
) -> Pin<Box<dyn Future<Output = Result<Vec<<Block as Block>::Hash>, Error>> + Send + 'async_trait>>where
'life0: 'async_trait,
LongestChain<B, Block>: 'async_trait,
fn leaves<'life0, 'async_trait>(
&'life0 self,
) -> Pin<Box<dyn Future<Output = Result<Vec<<Block as Block>::Hash>, Error>> + Send + 'async_trait>>where
'life0: 'async_trait,
LongestChain<B, Block>: 'async_trait,
Get all leaves of the chain, i.e. block hashes that have no children currently.
Leaves that can never be finalized will not be returned.
source§fn best_chain<'life0, 'async_trait>(
&'life0 self,
) -> Pin<Box<dyn Future<Output = Result<<Block as Block>::Header, Error>> + Send + 'async_trait>>where
'life0: 'async_trait,
LongestChain<B, Block>: 'async_trait,
fn best_chain<'life0, 'async_trait>(
&'life0 self,
) -> Pin<Box<dyn Future<Output = Result<<Block as Block>::Header, Error>> + Send + 'async_trait>>where
'life0: 'async_trait,
LongestChain<B, Block>: 'async_trait,
Among those
leaves
deterministically pick one chain as the generally
best chain to author new blocks upon and probably (but not necessarily)
finalize.source§fn finality_target<'life0, 'async_trait>(
&'life0 self,
base_hash: <Block as Block>::Hash,
maybe_max_number: Option<<<Block as Block>::Header as Header>::Number>,
) -> Pin<Box<dyn Future<Output = Result<<Block as Block>::Hash, Error>> + Send + 'async_trait>>where
'life0: 'async_trait,
LongestChain<B, Block>: 'async_trait,
fn finality_target<'life0, 'async_trait>(
&'life0 self,
base_hash: <Block as Block>::Hash,
maybe_max_number: Option<<<Block as Block>::Header as Header>::Number>,
) -> Pin<Box<dyn Future<Output = Result<<Block as Block>::Hash, Error>> + Send + 'async_trait>>where
'life0: 'async_trait,
LongestChain<B, Block>: 'async_trait,
Get the best descendent of
base_hash
that we should attempt to
finalize next, if any. It is valid to return the given base_hash
itself if no better descendent exists.Auto Trait Implementations§
impl<B, Block> Freeze for LongestChain<B, Block>
impl<B, Block> RefUnwindSafe for LongestChain<B, Block>where
Block: RefUnwindSafe,
B: RefUnwindSafe,
impl<B, Block> Send for LongestChain<B, Block>
impl<B, Block> Sync for LongestChain<B, Block>
impl<B, Block> Unpin for LongestChain<B, Block>where
Block: Unpin,
impl<B, Block> UnwindSafe for LongestChain<B, Block>where
B: RefUnwindSafe,
Block: UnwindSafe,
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