Signal-Desktop/ts/util/hasExpired.ts

const env = window.getEnvironment();

const NINETY_ONE_DAYS = 86400 * 91 * 1000;

export function hasExpired() {
  const { getExpiration, log } = window;

  let buildExpiration = 0;

  try {
    buildExpiration = parseInt(getExpiration(), 10);
    if (buildExpiration) {
      log.info('Build expires: ', new Date(buildExpiration).toISOString());
    }
  } catch (e) {
    log.error('Error retrieving build expiration date', e.stack);

    return true;
  }

  const tooFarIntoFuture = Date.now() + NINETY_ONE_DAYS < buildExpiration;

  if (tooFarIntoFuture) {
    log.error(
      'Build expiration is set too far into the future',
      buildExpiration
    );
  }

  if (env === 'production') {
    return Date.now() > buildExpiration && tooFarIntoFuture;
  }

  return buildExpiration && Date.now() > buildExpiration;
}