/**
 * @license
 * Copyright 2024 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { ByteString } from '../util/byte_string';
import { PersistencePromise } from './persistence_promise';
import { PersistenceTransaction } from './persistence_transaction';
/**
 * General purpose cache for global values.
 *
 * Global state that cuts across components should be saved here. Following are contained herein:
 *
 * `sessionToken` tracks server interaction across Listen and Write streams. This facilitates cache
 * synchronization and invalidation.
 */
export interface GlobalsCache {
    /**
     * Gets session token.
     */
    getSessionToken(transaction: PersistenceTransaction): PersistencePromise<ByteString>;
    /**
     * Sets session token.
     *
     * @param sessionToken - The new session token.
     */
    setSessionToken(transaction: PersistenceTransaction, sessionToken: ByteString): PersistencePromise<void>;
}