Function shift

packages/browser/src/transports/offline.ts:87–101

(store: Store)

/** Pop the oldest value from the store */
export function shift(store: Store): Promise<Uint8Array | string | undefined> {
  return store(store => {
    return keys(store).then(keys => {
      const firstKey = keys[0];
      if (firstKey == null) {
        return undefined;
      }

      return promisifyRequest(store.get(firstKey)).then(value => {
        store.delete(firstKey);
        return promisifyRequest(store.transaction).then(() => value);
      });
    });
  });
}

export interface BrowserOfflineTransportOptions extends Omit<OfflineTransportOptions, 'createStore'> {
  /**