/**
 * Bumped whenever the account-scoped stores are emptied for another account
 * (an account switch, a sign-out). A fetch captures it before awaiting the
 * server and drops its result if it has changed since: the data belongs to
 * an account that is no longer on screen, and writing it would show - and
 * let the user act on - one account's folders or filters in another.
 */
let epoch = 0;

export function currentStoreEpoch(): number {
  return epoch;
}

export function bumpStoreEpoch(): void {
  epoch++;
}