@dapperlabs/dappauth/utils.js

A util to prove actionable control ('ownership') over a public Ethereum address using eth_sign

function isHexString(value) {
  return (
    typeof value === 'string' &&
    value.length % 2 === 0 &&
    value.match(/^0x[0-9A-Fa-f]*$/)
  );
}

function removeHexPrefix(value) {
  return value.slice(0, 2) === '0x' ? value.slice(2) : value;
}

function mergeErrors(errEOA, errCA) {
  const msgEOA = errEOA
    ? `errored with: ${errEOA.toString()}`
    : 'returned false';
  return `Authorisation check failed and errored in 2 alternative flows. 'External Owned Account' check ${msgEOA} . 'Contract Account' check errored with: ${errCA.toString()}`;
}

module.exports = {
  isHexString,
  removeHexPrefix,
  mergeErrors,
};