import { HNSW } from './main';
import { DBSchema, IDBPDatabase } from 'idb';
type SerializedIndex = ReturnType<HNSW['toJSON']>;
interface HNSWDB extends DBSchema {
    'hnsw-index': {
        key: string;
        value: SerializedIndex;
    };
}
export declare class HNSWWithDB extends HNSW {
    dbName: string;
    db: IDBPDatabase<HNSWDB> | null;
    private constructor();
    /**
     * Creates an IndexedDB-backed HNSW instance.
     */
    static create(M: number, efConstruction: number, dbName: string, efSearch?: number): Promise<HNSWWithDB>;
    private initDB;
    /**
     * Closes the current IndexedDB connection if open.
     */
    close(): void;
    /**
     * Persists the current graph to IndexedDB.
     */
    saveIndex(): Promise<void>;
    /**
     * Loads a persisted graph from IndexedDB if present.
     */
    loadIndex(): Promise<void>;
    /**
     * Deletes persisted graph data and re-initializes the backing DB.
     */
    deleteIndex(): Promise<void>;
}
export {};