import type { Authentication } from './Authentication';
export interface TokenProviderOptions {
    initialToken?: string | null;
}
export declare class TokenProvider implements Authentication {
    private readonly callback;
    private readonly options;
    private tokenPromise;
    constructor(callback: () => Promise<string>, options?: TokenProviderOptions);
    token(): Promise<string>;
    refreshToken(): Promise<string>;
    isPublic(): boolean;
}