It's just not possible to use maps in invokers/actors without this. And maps
have too many combinations to try pushing them into a type switch, that's
where reflection kicks in and solves it easily.
Signed-off-by: Roman Khimov <roman@nspcc.ru>
Signers are very important for notary checks and keeping/passing an additional
copy of them is very inconvenient. Exposing them from invoker makes them
available in actors too.
Signed-off-by: Roman Khimov <roman@nspcc.ru>
