import type { IMemoryBackend, MemoryEntry, MemoryEntryUpdate, MemoryQuery, SearchOptions, SearchResult, BackendStats, HealthCheckResult } from './types.js';
export interface RvfBackendConfig {
    databasePath: string;
    dimensions?: number;
    metric?: 'cosine' | 'euclidean' | 'dot';
    quantization?: 'fp32' | 'fp16' | 'int8';
    hnswM?: number;
    hnswEfConstruction?: number;
    maxElements?: number;
    verbose?: boolean;
    defaultNamespace?: string;
    autoPersistInterval?: number;
}
export declare class RvfBackend implements IMemoryBackend {
    private entries;
    private keyIndex;
    private hnswIndex;
    private nativeDb;
    private config;
    private initialized;
    private dirty;
    private persisting;
    private persistTimer;
    private queryTimes;
    private searchTimes;
    constructor(config: RvfBackendConfig);
    initialize(): Promise<void>;
    shutdown(): Promise<void>;
    store(entry: MemoryEntry): Promise<void>;
    get(id: string): Promise<MemoryEntry | null>;
    getByKey(namespace: string, key: string): Promise<MemoryEntry | null>;
    update(id: string, updateData: MemoryEntryUpdate): Promise<MemoryEntry | null>;
    delete(id: string): Promise<boolean>;
    query(q: MemoryQuery): Promise<MemoryEntry[]>;
    search(embedding: Float32Array, options: SearchOptions): Promise<SearchResult[]>;
    bulkInsert(entries: MemoryEntry[]): Promise<void>;
    bulkDelete(ids: string[]): Promise<number>;
    count(namespace?: string): Promise<number>;
    listNamespaces(): Promise<string[]>;
    clearNamespace(namespace: string): Promise<number>;
    getStats(): Promise<BackendStats>;
    healthCheck(): Promise<HealthCheckResult>;
    private tryNativeInit;
    private compositeKey;
    private bruteForceSearch;
    private recordTiming;
    private avg;
    private loadFromDisk;
    private persistToDisk;
}
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