Section PartialMapSimulations.
Context {base_fst : BaseParams}.
Context {base_snd : BaseParams}.
Context {multi_fst : MultiParams base_fst}.
Context {multi_snd : MultiParams base_snd}.
Context {base_map : BaseParamsPartialMap base_fst base_snd}.
Context {name_map : MultiParamsNameTotalMap multi_fst multi_snd}.
Context {msg_map : MultiParamsMsgPartialMap multi_fst multi_snd}.
Context {name_map_bijective : MultiParamsNameTotalMapBijective name_map}.
Context {multi_map_congr : MultiParamsPartialMapCongruency base_map name_map msg_map}.
Definition pt_map_trace_occ (e : @name _ multi_fst * (@input base_fst + list (@output base_fst))) :
option (@name _ multi_snd * (@input base_snd + list (@output base_snd))) :=
match e with
| (n, inl io) =>
match pt_map_input io with
| Some io' => Some (tot_map_name n, inl io')
| None => None
end
| (n, inr out) => Some (tot_map_name n, inr (filterMap pt_map_output out))
end.
Definition pt_map_packet (p : @packet _ multi_fst)  :=
match p with
| mkPacket src dst m =>
match pt_map_msg m with
| Some m' => Some (mkPacket (tot_map_name src) (tot_map_name dst) m')
| None => None
end
end.
Definition pt_map_net (net : @network _ multi_fst) : @network _ multi_snd :=
{| nwPackets := filterMap pt_map_packet net.(nwPackets) ;
nwState := fun n => pt_map_data (net.(nwState) (tot_map_name_inv n)) |}.
Proof using name_map_bijective multi_map_congr msg_map.
apply functional_extensionality => n.
have H_eq := pt_init_handlers_eq.
rewrite H_eq {H_eq}.
by rewrite tot_map_name_inverse_inv.
Qed.
Proof using.
elim => //=.
case => /= n m l IH dst.
rewrite /pt_map_name_msg /=.
case pt_map_msg => [m'|] H_eq //=.
by rewrite IH.
Qed.

Lemma filterMap_pt_map_packet_map_eq :
forall l h,
filterMap pt_map_packet (map (fun m : name * msg => {| pSrc := h; pDst := fst m; pBody := snd m |}) l) =
map (fun m : name * msg => {| pSrc := tot_map_name h; pDst := fst m; pBody := snd m |}) (filterMap pt_map_name_msg l).