import { LockingCache } from "@scienta/locking-cache";
import { AuthClient, AuthenticationClientOptions } from "./auth-client";
import { TokenCache } from "./token-interceptor";
export declare class LockingTokenCache implements TokenCache {
    private readonly lockingCache;
    defaultLockTimeout: number;
    constructor(lockingCache?: LockingCache<string>, defaultLockTimeout?: number);
    getToken(authClient: AuthClient): Promise<string | null | undefined>;
    protected generateTokenCacheKey(authOptions: AuthenticationClientOptions): string;
    private hashKey;
}