Remove old ballots first so there won't be any
interference with votes of the same tx in the
future after `blockDiff` blocks.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
There are cases when NeoFS applications need to fetch netmap
snapshot of exact epoch. This method provides convenient atomic
way to do that.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
Sidechain contracts include alphabet contracts for governance
and audit, balance, container, neofsid, netmap, reputation
contracts.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
