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Blockchains are exceptional in that, as soon as a transaction has become recorded and confirmed, it may possibly?�t be changed. The ledger only permits a person-way information modification.Щоб по?а?и ?о?г?вл?, ко?и???ва?ам по???бно за?е?????ва?и ака?н?, п?ой?и ве?и??ка??? о?оби, к?пи?и/депон