Proof using.
intros.
unfold update_elections_data_appendEntries.
repeat break_match; subst; simpl in *; auto.
Qed.

Lemma update_elections_data_requestVote_leaderLogs :
forall h h' t lli llt st,
leaderLogs (update_elections_data_requestVote h h' t h' lli llt st) =
leaderLogs (fst st).