Remove nil if-statement from IDFromV2 function to which avoids checking the
correctness of the identifier format. From now IDFromV2 returns format error
on nil argument.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Replace owner.NEO3Wallet usage with owner.ID usage. Functions that process
the wallet address convert it to the owner identifier through the public
method.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
