Signed-off-by: Elizaveta Chichindaeva <elizaveta@nspcc.ru>
Also use neo-go private key wrapper where possible, as it already has methods for (un)marshaling. Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
Signed-off-by: Alex Vanin <alexey@nspcc.ru>