import { Socket } from 'net';
/**
 * Transmitter encodes RouterOS commands into properly framed buffers
 * and writes them to a socket. If the socket is not ready, it queues
 * the commands to be sent later.
 */
export declare class Transmitter {
    private socket;
    private pool;
    constructor(socket: Socket);
    /**
     * Sends a command line. If the socket isn't writable or if a backlog exists,
     * it queues the command instead.
     *
     * @param {string} data - Command or null to terminate a command group.
     */
    write(data: string): void;
    /**
     * Sends all previously queued commands once the socket is ready.
     */
    runPool(): void;
    /**
     * Encodes a string into RouterOS framed protocol using win1252.
     * Adds appropriate length prefix for each frame.
     *
     * @param {string|null} str
     * @returns {string} Encoded frame to be sent over the socket.
     */
    private encodeString;
}