import { StorageAdapter } from './storage_adapter';
/**
 * Adapter for managing data persistence using IndexedDB.
 * This adapter extends the `StorageAdapter` class and provides
 * methods to interact with IndexedDB for storing and retrieving data.
 */
export declare class IndexedDBAdapter extends StorageAdapter {
    private readonly dbName;
    private readonly storeName;
    private db;
    /**
     * Creates an instance of IndexedDBAdapter.
     *
     * @param {string} [dbName='cacheDB'] - The name of the database.
     * @param {string} [storeName='cacheStore'] - The name of the object store.
     */
    constructor(dbName?: string, storeName?: string);
    /**
     * Connects the adapter by initializing the database and object store if they do not exist.
     *
     * @returns {Promise<void>} A promise that resolves once the connection is ready.
     */
    connect(): Promise<void>;
    /**
     * Adds a key-value pair to the object store.
     *
     * @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 the object store.
     *
     * @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 key-value pairs from the object store.
     *
     * @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 the object store.
     *
     * @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 from the object store.
     *
     * @returns {Promise<void>} A promise that resolves once the data is cleared.
     */
    clear(): Promise<void>;
    /**
     * Handles transactions for interacting with the object store.
     *
     * @private
     * @template T
     * @param {IDBTransactionMode} mode - The transaction mode (e.g., 'readonly', 'readwrite').
     * @param {(store: IDBObjectStore) => IDBRequest | Promise<T>} callback - A callback function to perform operations within the transaction.
     * @returns {Promise<T>} A promise resolving to the result of the transaction.
     */
    private _withTransaction;
    /**
     * Converts an IndexedDB request into a Promise.
     *
     * @private
     * @template T
     * @param {IDBRequest} request - The IndexedDB request to promisify.
     * @returns {Promise<T>} A promise resolving to the request result.
     */
    private _promisifyRequest;
}