/// <reference types="node" />
import EventEmitter from "eventemitter3";
export type WSBgMsg = {
    type: WebSocketPluginCSType;
    url?: string;
    data?: string | Buffer | ArrayBuffer;
};
export declare enum WebSocketPluginCSType {
    Connect = "connect",
    Open = "open",
    Close = "close",
    Error = "error",
    Data = "data"
}
export type WebSocketPluginEvent = {
    message: (ev: {
        type: "message";
        data: any;
    }) => void;
    error: (ev: {
        type: "error";
        error: Error;
    }) => void;
    open: (ev: {
        type: "open";
    }) => void;
    close: (ev: {
        type: "close";
    }) => void;
};
export type PluginConnectMSG = {
    type: "open" | "data" | "connect" | "error";
    url?: string;
    data?: string | Buffer | ArrayBuffer;
};
export default class WSContentScript extends EventEmitter<WebSocketPluginEvent> {
    readonly url: string;
    private port;
    private open;
    onmessage: (ev: {
        type: "message";
        data: any;
    }) => void;
    onclose: (ev: {
        type: "close";
    }) => void;
    onerror: (ev: {
        type: "error";
        error: any;
    }) => void;
    onopen: (ev: {
        type: "open";
    }) => void;
    get writable(): boolean;
    get readable(): boolean;
    get destroyed(): boolean;
    get isOpen(): boolean;
    get readyState(): number;
    isPaused(): boolean;
    constructor(url: string);
    private initEvent;
    private initConnect;
    addEventListener(event: keyof WebSocketPluginEvent, handle: (...args: any[]) => void): void;
    send(data: Buffer | string | ArrayBuffer): void;
    close(): void;
}