import { ConnectionOptions, PoolOptions } from "mysql2/promise";
import { DBnxHandler } from "./handler.js";
export declare class DBnx {
    #private;
    ref: symbol;
    constructor(dbConfig: ConnectionOptions | PoolOptions | string, usePool?: boolean, logger?: (log: any) => void);
    constructor(dbConfig: ConnectionOptions | PoolOptions | string, logger?: (log: any) => void);
    constructor(dbConfig: ConnectionOptions | PoolOptions | string);
    /**
     * Establishes a database connection using either a connection pool or a single connection.
     * @param {function} [props] - Optional callback function for success or error handling.
     * @returns {DBnx} - The current instance of DBnx.
     */
    connect(props?: (err?: any, success?: any) => void): DBnxHandler;
}
export default DBnx;