/**
 * Storage options
 */
interface StorageOptions {
    storageType?: 'localStorage' | 'sessionStorage' | 'none';
    storagePrefix?: string;
}
/**
 * Checks if localStorage is available
 * @returns Whether localStorage is available
 */
export declare function isLocalStorageAvailable(): boolean;
/**
 * Checks if sessionStorage is available
 * @returns Whether sessionStorage is available
 */
export declare function isSessionStorageAvailable(): boolean;
/**
 * Checks if IndexedDB is available
 * @returns Whether IndexedDB is available
 */
export declare function isIndexedDBAvailable(): boolean;
/**
 * Saves a value to localStorage
 * @param key - Storage key
 * @param value - Value to store
 * @returns Whether the operation was successful
 */
export declare function saveToLocalStorage(key: string, value: string): boolean;
/**
 * Retrieves a value from localStorage
 * @param key - Storage key
 * @returns Retrieved value or null if not found
 */
export declare function getFromLocalStorage<T>(key: string): T | null;
/**
 * Removes a value from localStorage
 * @param key - Storage key
 * @returns Whether the operation was successful
 */
export declare function removeFromLocalStorage(key: string): boolean;
/**
 * Saves a value to sessionStorage
 * @param key - Storage key
 * @param value - Value to store
 * @returns Whether the operation was successful
 */
export declare function saveToSessionStorage(key: string, value: string): boolean;
/**
 * Retrieves a value from sessionStorage
 * @param key - Storage key
 * @returns Retrieved value or null if not found
 */
export declare function getFromSessionStorage<T>(key: string): T | null;
/**
 * Removes a value from sessionStorage
 * @param key - Storage key
 * @returns Whether the operation was successful
 */
export declare function removeFromSessionStorage(key: string): boolean;
/**
 * Storage utilities for UserDNA
 */
export declare const Storage: {
    getKey: (prefix?: string) => string;
    /**
     * Saves fingerprint data to the specified storage
     * @param data - Data to store
     * @param options - Storage options
     * @returns Whether the operation was successful
     */
    save: (data: any, options?: StorageOptions) => boolean;
    /**
     * Retrieves fingerprint data from the specified storage
     * @param options - Storage options
     * @returns Retrieved data or null if not found
     */
    get: <T>(options?: StorageOptions) => T | null;
};
export {};