import { NotificationType, WebSocketOptions } from '../types';
declare class WebSocketService {
    private socket;
    private isConnected;
    private options;
    messageQueue: string[];
    constructor(options: WebSocketOptions);
    private trace;
    private safeWsUrl;
    private getWebSocketConstructor;
    private socketUrl;
    private connect;
    send(deliveryIds: string[]): void;
    close(): void;
    getMessage(event: MessageEvent): {
        type: NotificationType.Error;
        data: {
            requested: import("./WebSocket").SentMessage;
            error: string;
            code?: string | number;
            description?: string;
        };
    } | {
        type: NotificationType.Message;
        data: import("./WebSocket").MessageData<any>;
    };
}
export default WebSocketService;