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make SelectChain async (#9128)

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* make SelectChain async

* make JustificationImport async
This commit is contained in:
André Silva
2021-06-20 12:01:09 +01:00
committed by GitHub
parent 650fc2f9c9
commit a26ec52450
18 changed files with 800 additions and 454 deletions
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substrate/primitives/consensus/common/src/select_chain.rs
+8 -7
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@@ -33,23 +33,24 @@ use sp_runtime::traits::{Block as BlockT, NumberFor};
/// some implementations.
///
/// Non-deterministically finalizing chains may only use the `_authoring` functions.
#[async_trait::async_trait]
pub trait SelectChain<Block: BlockT>: Sync + Send + Clone {
/// Get all leaves of the chain: block hashes that have no children currently.
/// 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.
fn leaves(&self) -> Result<Vec<<Block as BlockT>::Hash>, Error>;
async fn leaves(&self) -> Result<Vec<<Block as BlockT>::Hash>, Error>;
/// Among those `leaves` deterministically pick one chain as the generally
/// best chain to author new blocks upon and probably finalize.
fn best_chain(&self) -> Result<<Block as BlockT>::Header, Error>;
/// best chain to author new blocks upon and probably (but not necessarily)
/// finalize.
async fn best_chain(&self) -> Result<<Block as BlockT>::Header, Error>;
/// Get the best descendent of `target_hash` that we should attempt to
/// finalize next, if any. It is valid to return the given `target_hash`
/// itself if no better descendent exists.
fn finality_target(
async fn finality_target(
&self,
target_hash: <Block as BlockT>::Hash,
_maybe_max_number: Option<NumberFor<Block>>
_maybe_max_number: Option<NumberFor<Block>>,
) -> Result<Option<<Block as BlockT>::Hash>, Error> {
Ok(Some(target_hash))
}