let chain_listener = &ChainListenerSet(chain_listeners_at_height);
let mut chain_notifier = ChainNotifier { header_cache, chain_listener };
chain_notifier.connect_blocks(common_ancestor, most_connected_blocks, &mut chain_poller)
- .await.or_else(|(e, _)| Err(e))?;
+ .await.map_err(|(e, _)| e)?;
}
Ok(best_header)