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Blockchains are exceptional in that, once a transaction has become recorded and confirmed, it could?�t be transformed. The ledger only permits 1-way knowledge modification.То?г?ва?и ?о?н?ми к?ип?овал?? на ?по?овом?, ма?жинал?ном? ? ??�ючер?ном? ?инка?.Bitcoin halving occurs somewhere around each fou