/**
 * Opacus Transport Base Interface
 */
import { OpacusFrame } from '../types';
export interface ITransport {
    connect(): Promise<void>;
    disconnect(): Promise<void>;
    send(frame: OpacusFrame): Promise<void>;
    onMessage(handler: (frame: OpacusFrame) => void): void;
    isConnected(): boolean;
}
export declare abstract class BaseTransport implements ITransport {
    protected messageHandler?: (frame: OpacusFrame) => void;
    protected connected: boolean;
    abstract connect(): Promise<void>;
    abstract disconnect(): Promise<void>;
    abstract send(frame: OpacusFrame): Promise<void>;
    onMessage(handler: (frame: OpacusFrame) => void): void;
    isConnected(): boolean;
    protected emit(frame: OpacusFrame): void;
}
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