??????????? ??? ????? ???????, ??? ????? ?????? ??? ???????? ??. ???? ???????? ??? ?? ?????? ?? ???? ???? ?? ????????? ??? ?? ???? ???? ?? ?????????.It is "an open, dispersed ledger that could record transactions in between two functions efficiently and in a verifiable and lasting way".[63] For use for a dispersed ledger, a blockchain is usually