import { StoredManagerState } from "../types.js";
import { IClientStorageAdapter } from "./IClientStorageAdapter.js";
export interface IndexedDbStorageAdapterOptions {
    dbName?: string;
    storeName?: string;
    idbFactory?: IDBFactory;
}
/**
 * IndexedDB storage adapter for client-side DEM caching in browsers.
 */
export declare class IndexedDbStorageAdapter implements IClientStorageAdapter {
    private dbName;
    private storeName;
    private idbFactory;
    private dbPromise;
    /**
     * Initializes an IndexedDbStorageAdapter instance.
     *
     * @param options - Configuration options for database name, store name, and IDBFactory.
     */
    constructor(options?: IndexedDbStorageAdapterOptions);
    /**
     * Retrieves or initializes the underlying IDBDatabase connection.
     *
     * @returns A promise resolving to the IDBDatabase instance.
     * @throws {DEMError} Throws DEMErrorCode.STORAGE_NOT_SUPPORTED when IndexedDB is unavailable.
     */
    private getDb;
    /**
     * Persists manager state record to IndexedDB object store.
     *
     * @param className - The name identifier of the manager class.
     * @param state - Complete snapshot of the manager state.
     */
    saveManagerState<T = unknown>(className: string, state: StoredManagerState<T>): Promise<void>;
    /**
     * Retrieves stored manager state from IndexedDB store.
     *
     * @param className - The name identifier of the manager class.
     * @returns Parsed state object or null if absent.
     */
    loadManagerState<T = unknown>(className: string): Promise<StoredManagerState<T> | null>;
    /**
     * Removes saved manager state for given class name from IndexedDB.
     *
     * @param className - The name identifier of the manager class.
     */
    clearManagerState(className: string): Promise<void>;
    /**
     * Purges all stored records in the IndexedDB object store.
     */
    clearAll(): Promise<void>;
}