Replace ErrNotFound and ErrRangeOutOfBounds to core/object package in order
to share them across the libraries.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement Delete method on DB structure that adds deleted addresses to
tombstone index. Do not attach addresses from tombstone index to Select
result. Return error from Get method if address is presented in tombstone
index.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Implement bolt-based metabase that is going to be used in local object
storage. Implement Put/Get/Select methods.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
