Trait sp_blockchain::ForkBackend

pub trait ForkBackend<Block: BlockT>:
    HeaderMetadata<Block>
    + HeaderBackend<Block>
    + Send
    + Sync {
    // Provided method
    fn expand_forks(
        &self,
        fork_heads: &[Block::Hash],
    ) -> Result<BTreeSet<Block::Hash>, Error> { ... }
}

Handles stale forks.

Provided Methods

fn expand_forks( &self, fork_heads: &[Block::Hash], ) -> Result<BTreeSet<Block::Hash>, Error>

Returns block hashes for provided fork heads. It skips the fork if when blocks are missing (e.g. warp-sync) and internal tree_route function fails.

Example: G — A1 — A2 — A3 — A4 ( < fork1 ) -––C4 — C5 ( < fork2 ) We finalize A3 and call expand_fork(C5). Result = (C5,C4).

Implementors

impl<Block, T> ForkBackend<Block> for T

where Block: BlockT, T: HeaderMetadata<Block> + HeaderBackend<Block> + Send + Sync,