export declare class HnswIndex {
    protected readonly maxLayer: number;
    protected readonly maxNumberOfNeighbors: number;
    protected readonly efConstruction: number;
    protected readonly efSearch: number;
    protected readonly nodes: Map<string, Node>;
    protected entrypointKey: string | null;
    constructor(maxLayer?: number, maxNumberOfNeighbors?: number, efConstruction?: number, efSearch?: number);
    has(key: string): boolean;
    getVector(key: string): number[] | null;
    insert(key: string, vector: number[]): void;
    search(query: number[], k: number): string[];
    delete(key: string): boolean;
    private cosineSimilarity;
    protected assignLayer(): number;
    private searchLayer;
    private selectNeighbors;
    private shrinkNeighbors;
    private findNewEntrypoint;
}
export declare class Node {
    readonly key: string;
    maxLayer: number;
    readonly neighbors: Map<number, string[]>;
    readonly vector: number[];
    constructor(key: string, vector: number[], maxLayer: number);
}
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