import SQLite3, { Database } from 'sqlite3';
export declare function set(db: Database, key: string, value: string): Promise<SQLite3.RunResult>;
export declare function add(db: Database, key: string, value: string): Promise<SQLite3.RunResult>;
export declare function del(db: Database, key: string): Promise<SQLite3.RunResult>;
export declare function get(db: Database, key: string): Promise<string | undefined>;
export declare function has(db: Database, key: string): Promise<boolean>;
export declare function clean(db: Database, keyPrefix?: string, expirationTime?: number, vacuum?: boolean): Promise<void>;
export declare function hash(text: string): string;
export declare function set_xjson(db: Database, key: string, object: any, limit?: number): Promise<SQLite3.RunResult>;
export declare function get_xjson(db: Database, key: string): Promise<any>;
export default class KTVMap {
    private readonly dbPath;
    constructor(dbPath: string);
    readonly db: Database;
    set_xjson(key: string, object: any, limit?: number): Promise<SQLite3.RunResult>;
    get_xjson(key: string): Promise<any>;
    set_xjson_p(key: string, object: any): Promise<SQLite3.RunResult>;
    get_xjson_p(key: string): Promise<any>;
    set(key: string, value: string): Promise<SQLite3.RunResult>;
    add(key: string, value: string): Promise<SQLite3.RunResult>;
    delete(key: string): Promise<SQLite3.RunResult>;
    get(key: string): Promise<string | undefined>;
    has(key: string): Promise<boolean>;
    clean(keyPrefix?: string, expirationTime?: number, vacuum?: boolean): Promise<void>;
}
export declare function queryIdByHashes(db: Database, hashes: string[]): Promise<Map<string, number>>;
export declare function queryValueByIds(db: Database, ids: number[]): Promise<Map<number, string>>;
export declare function queryHashByHashes(db: Database, hashes: string[]): Promise<Set<string>>;
export declare function tryInsertHashValues(db: Database, hashValues: [string, string][]): Promise<void>;
export declare function saveHashValues(db: Database, hashValues: [string, string][]): Promise<Map<string, number>>;
export declare function hello(): Promise<void>;
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