Definition getStL n d (C : TPCCoh d) (pf : n \in nodes) : Log :=
match find log (getLocal n d) as f return _ = f -> _ with
Some v => fun epf => icast (sym_eq (cohStL C pf epf)) (dyn_val v)
| _ => fun epf => [::]
end (erefl _).

Lemma cn_in : cn \in nodes.