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old_finalized_hash

cumulus_client_consensus_common

Function old_finalized_hash 

Source 
pub fn old_finalized_hash<C, Block>(
    client: &C,
    tree_route: &[Block::Hash],
    fallback_parent: Block::Hash,
) -> Block::Hash
where
    C: HeaderBackend<Block>,
    Block: BlockT,
Expand description

Resolve the previously-finalized block hash: the parent of the first block in tree_route, or fallback_parent (the just-finalized header’s parent) when the route is empty or that header can’t be loaded.