import { StorageAdapter } from './storage_adapter';
/**
 * Adapter for managing data persistence using localStorage.
 * This adapter extends the base `StorageAdapter` class and provides
 * methods to interact with the localStorage API.
 */
export declare class LocalStorageAdapter extends StorageAdapter {
    private readonly storageKey;
    /**
     * Creates an instance of LocalStorageAdapter.
     *
     * @param {string} [storageKey='cache-local-storage'] - The key used to store data in localStorage.
     */
    constructor(storageKey?: string);
    /**
     * Connects the adapter by initializing the localStorage space if it doesn't already exist.
     *
     * @returns {Promise<void>} A promise that resolves once the connection is ready.
     */
    connect(): Promise<void>;
    /**
     * Adds a key-value pair to the localStorage data.
     *
     * @param {string} key - The key associated with the value.
     * @param {unknown} value - The value to store.
     * @returns {Promise<void>} A promise that resolves once the data is stored.
     */
    add(key: string, value: unknown): Promise<void>;
    /**
     * Retrieves a value associated with a given key from localStorage.
     *
     * @param {string} key - The key to retrieve.
     * @returns {Promise<unknown | null>} A promise resolving to the value, or null if the key doesn't exist.
     */
    get(key: string): Promise<unknown | null>;
    /**
     * Retrieves all data stored in localStorage under the adapter's key.
     *
     * @returns {Promise<Record<string, unknown>>} A promise resolving to an object containing all stored data.
     */
    getAll(): Promise<Record<string, unknown>>;
    /**
     * Deletes a specific key and its associated value from localStorage.
     *
     * @param {string} key - The key to delete.
     * @returns {Promise<void>} A promise that resolves once the key is deleted.
     */
    delete(key: string): Promise<void>;
    /**
     * Clears all data stored under the adapter's key in localStorage.
     *
     * @returns {Promise<void>} A promise that resolves once the data is cleared.
     */
    clear(): Promise<void>;
    /**
     * Sets the data in localStorage under the adapter's key.
     *
     * @private
     * @param {Record<string, unknown>} data - The data to store.
     */
    private _setStorageData;
}