?????? ?? ??? ???????? ???? ?????????? ?? ????????????? ??? ????? ?? ????? ???? "? ??????? ?? ???????? ??? ??????????? ?????????".It can be "an open, dispersed ledger which will document transactions in between two get-togethers effectively As well as in a verifiable and everlasting way".[63] For use to be a distributed ledger, a blockchain is usua