export interface HeartbeatClientOptions {
    /**
     * Signer window to send and receive heartbeat messages from
     */
    signerWindow: Window;
    /**
     * Callback when first heartbeat has been received
     */
    onEstablish: (origin: string, status: 'pending' | 'ready') => void;
    /**
     * Reasonable time in milliseconds in which the communication channel needs to be established
     * @default 10000
     */
    establishTimeout?: number;
    /**
     * Callback when no heartbeats have been received for `establishTimeout` milliseconds
     */
    onEstablishTimeout: () => void;
    /**
     * Callback when status response has changed
     */
    onStatusChange: (status: 'pending' | 'ready') => void;
    /**
     * Reasonable time in milliseconds in which the communication channel can be pending
     * @default 300000
     */
    pendingTimeout?: number;
    /**
     * Callback when no heartbeats have been received for `pendingTimeout` milliseconds
     */
    onPendingTimeout: () => void;
    /**
     * Time in milliseconds of not receiving heartbeat responses after which the communication channel is disconnected
     * @default 5000
     */
    disconnectTimeout?: number;
    /**
     * Callback when no heartbeats have been received for `disconnectTimeout` milliseconds
     */
    onDisconnect: () => void;
    /**
     * Status polling rate in ms
     * @default 300
     */
    statusPollingRate?: number;
    /**
     * Relying party window, used to listen for incoming message events
     * @default globalThis.window
     */
    window?: Window;
    /**
     * Get random uuid implementation for status messages
     * @default globalThis.crypto
     */
    crypto?: Pick<Crypto, 'randomUUID'>;
}
export declare class HeartbeatClient {
    #private;
    constructor(options: HeartbeatClientOptions);
}