Proof using.
unfold update_elections_data_appendEntries.
intros. repeat break_match; auto.
Qed.

Lemma leaderLogs_update_elections_data_requestVote :
forall h src t ci lli llt st,
leaderLogs (update_elections_data_requestVote h src t ci lli llt st) =
leaderLogs (fst st).