import { Db } from 'mongodb';
export declare class MongoConnect {
    private _readyConnection;
    private _connection;
    private _db;
    private static _instance;
    private constructor();
    static readonly Instance: MongoConnect;
    connect(connectionString?: string, database?: string): Promise<Db>;
    readonly connection: Promise<any>;
    readonly db: any;
    gracefulExit(): void;
}
export declare const MongoConnection: MongoConnect;
export default MongoConnection;