export interface HasExpiresAt {
    expires_at: null | number;
}
export default interface TokenStorageInterface<T> {
    hasAccessToken(): Promise<boolean>;
    getAccessToken(): Promise<null | string>;
    getAccessTokenObject(): Promise<null | (T & HasExpiresAt)>;
    logout(): Promise<void>;
    generateToken(parameters: unknown): Promise<T & HasExpiresAt>;
    refreshToken(): Promise<T & HasExpiresAt>;
    getCurrentTokenExpiresIn(): Promise<number | null>;
}