cc-zos-vouching/lib/helpers/validateAddress.js

Vouching logic for the EVM packages of the ZeppelinOS smart contract platform

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = validateAddress;
function validateAddress(address) {
  if (!address) return false;
  if (address === '0x0000000000000000000000000000000000000000') return false;
  if (address.substring(0, 2) !== "0x") return false;

  // Basic validation: length, valid characters, etc
  if (!/^(0x)?[0-9a-f]{40}$/i.test(address)) return false;

  // Checksum validation.
  const raw = address.replace('0x', '');
  const allLowerCase = raw.toLowerCase() === raw;
  const allUppercase = raw.toUpperCase() === raw;
  if (allLowerCase || allUppercase) {
    return true; // accepts addreses with no checksum data
  } else {
    const checksum = ethjs.toChecksumAddress(address);
    if (address !== checksum) return false;
  }

  return true;
}