Function substrate_relay_helper::messages::source::best_finalized_peer_header_at_self

pub async fn best_finalized_peer_header_at_self<SelfChain, PeerChain>(
    self_client: &impl Client<SelfChain>,
    at_self_hash: HashOf<SelfChain>,
) -> Result<Option<HeaderIdOf<PeerChain>>, SubstrateError>
where
    SelfChain: Chain,
    PeerChain: Chain,

Reads best PeerChain header known to the SelfChain using provided runtime API method.

Method is supposed to be the <PeerChain>FinalityApi::best_finalized() method.