Last September, Ethereum crossed the Rubicon. The blockchain, which had until then operated under a proof-of-work (Pow) architecture similar to those underpinning cryptocurrencies such as bitcoin, switched to an entirely new mechanism known as proof of stake (Pos).
Under the old system, block creators known as ‘miners’ would be given Ethereum’s cryptocurrency ether (ETH) in return for decrypting hexadecimal numerical codes. Under Pos, members of the network – now known as ‘validators’ – stake
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