Alphabet contracts are holders of NEO token in sidechain.
Inner ring nodes control sidechain validators list through
voting of alphabet contracts.
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>