export declare class WebSocketAsync {
    private ws;
    private bufferedMessages;
    private awaiters;
    private closed;
    private onerror;
    private onclose;
    private onmessage;
    private dispatchMessages;
    constructor(ws: WebSocket);
    close(): void;
    send(data: any): void;
    sendBytes(data: ArrayBufferLike | Blob | ArrayBufferView): void;
    sendBytesControlled(data: ArrayBufferLike | Blob | ArrayBufferView, bytesThreshold: number): Promise<void>;
    private createTimeout;
    private registerPromise;
    refresh(p: Promise<any>): void;
    waitForClose(timeout?: number): Promise<void>;
    waitForMessage<T = any>(type: string, timeout?: number): Promise<Result<T>>;
    waitForAnyMessage<T = any>(timeout?: number): Promise<Result<T>>;
}
export declare type ResultValue<T> = {
    kind: "value";
    value: T;
};
export declare type ResultError = {
    kind: "error";
    error: string;
};
export declare type Result<T> = ResultValue<T> | ResultError;
export declare function value<T>(value: T): ResultValue<T>;
export declare function error(error: string): ResultError;
export declare function webSocket(url: string): Promise<Result<WebSocketAsync>>;