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Struct polkadot_service::LongestChain

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pub struct LongestChain<B, Block> { /* private fields */ }
Expand description

Implement Longest Chain Select implementation where ‘longest’ is defined as the highest number of blocks

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impl<B, Block> LongestChain<B, Block>
where B: Backend<Block>, Block: Block,

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pub fn new(backend: Arc<B>) -> LongestChain<B, Block>

Instantiate a new LongestChain for Backend B

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impl<B, Block> Clone for LongestChain<B, Block>

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fn clone(&self) -> LongestChain<B, Block>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<B, Block> SelectChain<Block> for LongestChain<B, Block>
where B: Backend<Block>, Block: Block,

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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.
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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.
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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§

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impl<B, Block> Freeze for LongestChain<B, Block>

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impl<B, Block> RefUnwindSafe for LongestChain<B, Block>
where Block: RefUnwindSafe, B: RefUnwindSafe,

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impl<B, Block> Send for LongestChain<B, Block>
where B: Sync + Send, Block: Send,

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impl<B, Block> Sync for LongestChain<B, Block>
where B: Sync + Send, Block: Sync,

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impl<B, Block> Unpin for LongestChain<B, Block>
where Block: Unpin,

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impl<B, Block> UnwindSafe for LongestChain<B, Block>
where B: RefUnwindSafe, Block: UnwindSafe,

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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