import { Observable, Subject } from 'rxjs';
import { ReachMessage } from './proto/reach';
/**
 * A class for managing communications between a Reach Protocol device (server) and client.
 * @remarks This should be implemented appropriately for the data transport method being used, such as BLE.
 */
export declare abstract class NetworkAccess {
    protected onMessageSubject: Subject<Uint8Array>;
    /**
     * Observable fired whenever new raw data is received from the Reach Protocol device (server).
     */
    onMessage$: Observable<Uint8Array>;
    /**
     * Sends data to a Reach Protocol device (server).  This method should return upon successful transmission of the data.
     * @param bytes - The raw bytes to be sent, generally containing a Reach Protocol message
     */
    abstract sendBytes(bytes: Uint8Array): void | Promise<void | Uint8Array>;
    /**
     * Sends a provided Reach Protocol message to the device via the provided method for sending bytes.
     * @param message - The message to be sent to the device.
     * @param classicHeader - Whether the legacy "classic" header format should be used.  Defaults to false.
     * @returns The return from the {@link sendBytes} function call
     */
    send(message: ReachMessage, classicHeader?: boolean): void | Promise<void | Uint8Array>;
    /**
     * A method to be called whenever bytes are received from the Reach Protocol device (server).
     * These bytes are then parsed as a Reach Protocol message.
     * @param bytes - The raw bytes from the device
     */
    received(bytes: Uint8Array): void;
}