Ethereum, Ethereum 2.0, smart contract, EVM, ethash, DAG, Ethereum Classic, Polygon, BAT, Solidity, Gas, Chainlink, Vitalik Buterin, Gavin Wood, Ethereum Foundation, EIPs, ERC, Lighthouse ethereum client, Prysm, Ethereum clients, Ethereum Gossip Protocol, sETH, ETH1 address, Ganache, Aave