/// <reference types="node" />
import { SDKConfig } from '../SDKConfig';
import { UserInfo } from '../SDKContext';
/** A class containing framework-agnostic SDK methods */
export declare class SDKCore {
    private config;
    private urlHelper;
    private redirectHelper;
    private tokenExpirationTimeout?;
    constructor(config: SDKConfig);
    startLogin(state?: string): void;
    startRegister(state?: string): void;
    startLogout(): void;
    manageAccount(): void;
    fetchUserInfo<T = UserInfo>(): Promise<T>;
    refreshToken(): Promise<Response>;
    initAutoRefresh(): NodeJS.Timeout | undefined;
    handlePostRedirect(callback?: (state?: string) => void): void;
    get isLoggedIn(): boolean;
    /** The moment of access token expiration in milliseconds since epoch. */
    private get at_exp();
    /**
     * Schedules `onTokenExpiration` at moment of access token expiration.
     * SDKCore is not necessarily reactive like React, Angular, and Vue.
     * so `onTokenExpiration` is for reactive frameworks to hook in and perform actions as on token expiration.
     */
    private scheduleTokenExpiration;
}