BTC addresses use Base58 (like Base64 but with out related character: IOl0+/) and will have to start with either one, 3, bc1q or bc1p dependant upon what sort of address it really is. Ethereum addresses are unique identifiers accustomed to mail, receive, and retailer Ether (ETH) about the Ethereum community. https://vanitytron96306.mybuzzblog.com/9170488/random-eth-wallet-address-for-dummies