import { TokenCacheStorage } from '../cache';
import { Config } from '../models';
import { Token } from '../models/token.model';
export type TokenRefreshFn = (config: Config) => Promise<Token>;
export declare function getTokenCache(): TokenCacheStorage | null;
export declare function getFreshAccessToken(config: Config, refreshFn: TokenRefreshFn, force?: boolean): Promise<string | null>;
export declare function updateProviderKey(config: Config, accessToken: string, providerKey: string): Promise<void>;