import WebSocketMetrics from './websocket-metrics';
declare type OnClosedParams = {
    code: number;
    reason: string;
};
export interface EventListener {
    onOpened: (() => any);
    onClosed: ((event: OnClosedParams) => any);
    onMessage: ((data: ArrayBuffer) => any);
}
export default abstract class WebSocketClient {
    private readonly _url;
    private readonly _listener;
    protected constructor(url: string, listener: EventListener);
    get url(): string;
    abstract get isConnecting(): boolean;
    abstract get isConnected(): boolean;
    abstract get metrics(): WebSocketMetrics;
    protected notifyOnOpened(): void;
    protected notifyOnClosed(event: OnClosedParams): void;
    protected notifyOnMessage(data: ArrayBuffer): void;
    abstract close(): void;
    abstract send(data: ArrayBufferLike | Blob | ArrayBufferView): Promise<void>;
}
export {};
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