export type ConnectedHandler = () => Promise<void>;
export type DisconnectedHandler = () => Promise<void>;
/**
 * Represents the lifecycle state for a Chronicle connection.
 */
export declare class ConnectionLifecycle {
    private readonly _onConnected;
    private readonly _onDisconnected;
    private readonly _onFailed;
    private _failure?;
    private _isConnected;
    private _connectionId;
    /**
     * Gets whether the connection is currently connected.
     */
    get isConnected(): boolean;
    /** Gets the terminal connection failure, if recovery has stopped. */
    get failure(): Error | undefined;
    /**
     * Gets the current connection identifier.
     */
    get connectionId(): string;
    /**
     * Registers a callback for when the connection is connected.
     * @param handler - Callback to invoke on connect.
     * @returns A function that unsubscribes the callback.
     */
    onConnected(handler: ConnectedHandler): () => void;
    /**
     * Registers a callback for when the connection is disconnected.
     * @param handler - Callback to invoke on disconnect.
     * @returns A function that unsubscribes the callback.
     */
    onDisconnected(handler: DisconnectedHandler): () => void;
    /** Registers a callback for a terminal connection failure. */
    onFailed(handler: (error: Error) => Promise<void>): () => void;
    /** Stops recovery and notifies observers of the terminal connection failure. */
    failed(error: Error, onError: (error: unknown) => void): Promise<void>;
    /**
     * Marks lifecycle as connected and invokes connected handlers.
     */
    connected(onError: (error: unknown) => void): Promise<void>;
    /**
     * Marks lifecycle as disconnected and invokes disconnected handlers.
     */
    disconnected(onError: (error: unknown) => void): Promise<void>;
    private invokeHandler;
}
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