import { AuthSession } from "./model/AuthSession";
import { FairMutex } from "./FairMutex";
/**
 * Maintains a global session state, even across package versions.
 *
 * This is to allow users to start auth sessions via the Bytescale JavaScript SDK, where due to versioning or other
 * bundling issues, the Bytescale Upload Widget has been bundled with a different Bytescale JavaScript SDK. In this
 * scenario, the user wouldn't be able to start an auth session with the Bytescale Upload Widget. Therefore, we use
 * global state (i.e. on the window) to ensure the session state can be shared between the user's instance of the
 * Bytescale JavaScript SDK and the Upload Widget's version of the Bytescale JavaScript SDK.
 *
 * Users also frequently have problems caused by them not keeping track of *Api and *Manager instances correctly, so
 * making this global prevents a lot of common mistakes.
 */
export declare class AuthSessionState {
    private static readonly stateKey;
    private static readonly mutexKey;
    /**
     * Called in the browser only.
     */
    static getMutex(): FairMutex;
    /**
     * Called in the browser only.
     */
    static setSession(session: AuthSession | undefined): void;
    /**
     * Called in the browser and in Node.js (so we check the env before calling env-specific code).
     */
    static getSession(): AuthSession | undefined;
}