import WebSocket from 'isomorphic-ws';
import { WsTopic } from '../../types/websockets/client.js';
import { MessageEventLike } from '../requestUtils.js';
/**
 * Normalised internal format for a request (subscribe/unsubscribe/etc) on a topic, with optional parameters.
 *
 * - Topic: the topic this event is for
 * - Payload: the parameters to include, optional. E.g. auth requires key + sign. Some topics allow configurable parameters.
 * - Category: required for bybit, since different categories have different public endpoints
 */
export interface WsTopicRequest<TWSTopic extends string = string, TWSPayload = unknown> {
    topic: TWSTopic;
    payload?: TWSPayload;
}
/**
 * Conveniently allow users to request a topic either as string topics or objects (containing string topic + params)
 */
export type WsTopicRequestOrStringTopic<TWSTopic extends string, TWSPayload = unknown> = WsTopicRequest<TWSTopic, TWSPayload> | string;
/** Should be one WS key per unique URL */
export declare const WS_KEY_MAP: {
    readonly spotPublicV1: "spotPublicV1";
    readonly spotPrivateV1: "spotPrivateV1";
    readonly futuresPublicV1: "futuresPublicV1";
    readonly futuresPrivateV1: "futuresPrivateV1";
    readonly futuresPublicV2: "futuresPublicV2";
    readonly futuresPrivateV2: "futuresPrivateV2";
};
/** This is used to differentiate between each of the available websocket streams */
export type WsKey = (typeof WS_KEY_MAP)[keyof typeof WS_KEY_MAP];
/**
 * Some exchanges have two livenet environments, some have test environments, some dont. This allows easy flexibility for different exchanges.
 * Examples:
 *  - One livenet and one testnet: NetworkMap<'livenet' | 'testnet'>
 *  - One livenet, sometimes two, one testnet: NetworkMap<'livenet' | 'testnet', 'livenet2'>
 *  - Only one livenet, no other networks: NetworkMap<'livenet'>
 */
type NetworkMap<TRequiredKeys extends string, TOptionalKeys extends string | undefined = undefined> = Record<TRequiredKeys, string> & (TOptionalKeys extends string ? Record<TOptionalKeys, string | undefined> : Record<TRequiredKeys, string>);
export declare const WS_BASE_URL_MAP: Record<WsKey, NetworkMap<'livenet', 'demo'>>;
export declare const WS_ERROR_ENUM: {
    INVALID_ACCESS_KEY: string;
};
export declare function neverGuard(x: never, msg: string): Error;
/**
 * ws.terminate() is undefined in browsers.
 * This only works in node.js, not in browsers.
 * Does nothing if `ws` is undefined. Does nothing in browsers.
 */
export declare function safeTerminateWs(ws?: WebSocket | any, fallbackToClose?: boolean): boolean;
/**
 * Users can conveniently pass topics as strings or objects (object has topic name + optional params).
 *
 * This method normalises topics into objects (object has topic name + optional params).
 */
export declare function getNormalisedTopicRequests(wsTopicRequests: WsTopicRequestOrStringTopic<string>[]): WsTopicRequest<WsTopic>[];
/**
 * WebSocket.ping() is not available in browsers. This is a simple check used to
 * disable heartbeats in browers, for exchanges that use native WebSocket ping/pong frames.
 */
export declare function isWSPingFrameAvailable(): boolean;
/**
 * WebSocket.pong() is not available in browsers. This is a simple check used to
 * disable heartbeats in browers, for exchanges that use native WebSocket ping/pong frames.
 */
export declare function isWSPongFrameAvailable(): boolean;
export declare function decompressMessageEvent(event: MessageEventLike<Buffer<ArrayBufferLike>>): Promise<MessageEventLike<any>>;
export {};