function utilCrypto.isEthereumAddressimport { utilCrypto } from "https://dotland.deno.dev/x/polkadot@0.2.23/mod.ts"; const { isEthereumAddress } = utilCrypto; isEthereumAddress(address?: HexString | string): booleanParametersoptionaladdress: HexString | stringReturnsboolean