import { CyphlensErrorCallback, CyphlensEvent, DisconnectEvent, EventCallback, EventType, FileKeyEvent, StatusType, TwoFactorEvent } from './types';
import { DEFAULT_BASE_URL } from "./constants";
export { EventType, StatusType, DEFAULT_BASE_URL, };
export type { EventCallback, TwoFactorEvent, CyphlensErrorCallback, DisconnectEvent, CyphlensEvent, FileKeyEvent };
export declare class Cyphlens {
    private baseUrl;
    private eventSource;
    private sessionID?;
    private onSuccess?;
    private onError?;
    private timeoutId;
    private isFileKeySwipe;
    /**
     * Initializes the Cyphlens service with a base URL.
     * @param baseUrl The base API URL for connecting to the Cyphlens service.
     * @param isFileKeySwipe set true if listening to FileKey swipe events
     */
    constructor(baseUrl?: string, isFileKeySwipe?: boolean);
    /**
     * Updates the base API URL.
     * @param baseUrl The new base URL.
     */
    setBaseUrl(baseUrl: string): void;
    /**
     * Updates the isFileKeySwipe flag.
     * @param isFileKeySwipe set true if listening to FileKey swipe events.
     */
    setIsFileKeySwipe(isFileKeySwipe: boolean): void;
    /**
     * Starts the Server-Sent Events (SSE) connection to listen for authentication events.
     * @returns The EventSource instance if successful, otherwise null.
     */
    private start;
    /**
     * Sets up a timeout to automatically stop the SSE connection when the event expires.
     * @param expiresAt The expiration timestamp (milliseconds).
     * @param createdAt The creation timestamp (milliseconds).
     */
    private setupTimeout;
    /**
     * Starts listening for authentication events.
     * @param sessionId The session ID used for authentication.
     * @param onData Callback function for handling successful authentication events.
     * @param onError Callback function for handling errors.
     * @returns The EventSource instance if successfully started, otherwise null.
     */
    listen(sessionId: string, onData?: EventCallback, onError?: CyphlensErrorCallback): EventSource | null;
    /**
     * Stops the SSE connection and clears any active timeouts.
     */
    stop(): void;
    /**
     * Handles browser visibility changes to restart the SSE connection when the page becomes visible.
     * This is primarily to prevent connection loss in Safari when the tab goes to the background.
     * Only applies to Mobile Safari.
     */
    private readonly onVisibilityChange;
}
export type CyphlensExports = {
    Cyphlens: typeof Cyphlens;
    EventType: typeof EventType;
    StatusType: typeof StatusType;
    TwoFactorEvent: TwoFactorEvent;
    CyphlensEvent: CyphlensEvent;
    DisconnectEvent: DisconnectEvent;
    EventCallback: EventCallback;
    CyphlensErrorCallback: CyphlensErrorCallback;
};
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