PORT_BLOCKCHAIN_USER = 1111
PORT_BANK_SELLER = 2222
PORT_BANK_USER = 3333
PORT_SELLER_USER = 4444
PORT_EXCHANGE_BANK = 5555
PORT_EXCHANGE_BLOCKCHAIN = 6666
TITLE_BLOCKCHAIN = 'blockChain'
TITLE_EXCHANGE_CENTER = 'exchange'
TITLE_BANK = 'bank'
TITLE_SELLER = 'seller'
TITLE_USER = 'user'
