@polkadot/util-crypto/ethereum/isAddress.js

A collection of useful crypto utilities for @polkadot

import { isHex } from '@polkadot/util';
import { isEthereumChecksum } from './isChecksum.js';
export function isEthereumAddress(address) {
    if (!address || address.length !== 42 || !isHex(address)) {
        return false;
    }
    else if (/^(0x)?[0-9a-f]{40}$/.test(address) || /^(0x)?[0-9A-F]{40}$/.test(address)) {
        return true;
    }
    return isEthereumChecksum(address);
}