Proof using name_map_bijective multi_map_congr.
move => net net' tr.
case => {net net' tr}.
- move => net net' p ms ms' out d l H_eq H_hnd H_eq'.
rewrite /tot_map_trace_occ /=.
have ->: tot_map_name (pDst p) = pDst (tot_map_packet p) by case: p H_eq H_hnd H_eq' => src dst m H_eq H_hnd H_eq'.
apply (@StepAsync_deliver _ _ _ _ _ (map tot_map_packet ms) (map tot_map_packet ms') (map tot_map_output out) (tot_map_data d) (tot_map_name_msgs l)).
* by rewrite /tot_map_net /= H_eq /= map_app.
* rewrite /=.
case: p H_eq H_hnd H_eq' => /= src dst m H_eq H_hnd H_eq'.
have H_q := tot_net_handlers_eq dst src m (nwState net dst).
rewrite /tot_mapped_net_handlers in H_q.
rewrite H_hnd in H_q.
rewrite H_q.
by rewrite tot_map_name_inv_inverse.
* rewrite /= H_eq' /= /tot_map_net /=.
rewrite -tot_map_update_packet_eq.
rewrite 2!map_app.
destruct p.
by rewrite tot_map_packet_map_eq.
- move => h net net' out inp d l H_hnd H_eq.
apply (@StepAsync_input _ _ _ _ _ _ _ (tot_map_data d) (tot_map_name_msgs l)).
rewrite /=.
have H_q := tot_input_handlers_eq h inp (nwState net h).
rewrite /tot_mapped_input_handlers /= in H_q.
rewrite H_hnd in H_q.
rewrite H_q.
by rewrite tot_map_name_inv_inverse.
rewrite /= H_eq /= /tot_map_net /=.
by rewrite -tot_map_update_eq map_app tot_map_packet_map_eq.
Qed.

Corollary step_async_tot_mapped_simulation_star_1 :
forall net tr,
@step_async_star _ multi_fst step_async_init net tr ->
@step_async_star _ multi_snd step_async_init (tot_map_net net) (map tot_map_trace_occ tr).