/**
 * Returns a consistent unique identifier for this browser (or the Node/Deno environment).
 *
 * If no identifier exists yet, one is generated and persisted.
 * @returns {string} The existing or newly generated browser identifier.
 */
export declare function getBrowserId(): string;
/**
 * Backwards-compatible alias for getBrowserId().
 * @returns {string} The existing or newly generated browser identifier.
 */
export declare function browserId(): string;
/**
 * Check whether a browser ID is already persisted without generating one.
 * @returns {boolean} True if a browser ID is currently persisted.
 */
export declare function hasBrowserId(): boolean;
/**
 * Delete any persisted browser ID from the underlying storage.
 * @returns {void}
 */
export declare function deleteBrowserId(): void;
/**
 * Force-generate a new browser ID, persist it, and return it.
 * @returns {string} The newly generated browser identifier.
 */
export declare function rotateBrowserId(): string;