/**
 * @public
 * @template {{}} ApiType
 * Create an RPC client that will relay any method that is called via `send`. It
 * listens to replies from the server via `receiver`.
 *
 * @param {MessagePort | MessagePortLike | MessagePortNode} channel MessagePort-like object that must implement an `.on('message')` event handler and a `.postMessage()` method.
 * @param {object} [options] Options object
 * @param {number} [options.timeout=5000] Optionally set timeout (default 5000)
 * @param {false | Omit<import('pino').BaseLogger, 'level' | 'silent'>} [options.logger = false] options.logger Set to `false` to disable logging, or pass a pino logger instance to enable logging
 * @param {(request: Omit<MsgRequestObj, 'metadata'>, next: (request: MsgRequestObj) => Promise<any>) => void} [options.onRequestHook] Optional hook to observe and modify a request and its metadata, and to await the response.
 * @returns {ClientApi<ApiType>}
 */
export function createClient<ApiType extends {}>(channel: MessagePort | MessagePortLike | MessagePortNode, { timeout, logger, onRequestHook }?: {
    timeout?: number | undefined;
    logger?: false | Omit<import("pino").BaseLogger, "level" | "silent"> | undefined;
    onRequestHook?: ((request: Omit<MsgRequestObj, "metadata">, next: (request: MsgRequestObj) => Promise<any>) => void) | undefined;
}): ClientApi<ApiType>;
export namespace createClient {
    /**
     * Close a client. Note this is a static method on `createClient` and it expects
     * a client created with `createClient` as its argument.
     *
     * @param {any} client A client created with `createClient`
     */
    function close(client: any): any;
}
export type MsgRequest = import("./lib/types.js").MsgRequest;
export type MsgResponse = import("./lib/types.js").MsgResponse;
export type MsgOn = import("./lib/types.js").MsgOn;
export type MsgOff = import("./lib/types.js").MsgOff;
export type MsgEmit = import("./lib/types.js").MsgEmit;
export type Message = import("./lib/types.js").Message;
export type Client = import("./lib/types.js").Client;
export type SubClient = import("./lib/types.js").SubClient;
export type ClientApi<ApiType extends {}> = import("./lib/types.js").ClientApi<ApiType>;
export type MessagePortLike = import("./lib/types.js").MessagePortLike;
export type MessagePortNode = import("worker_threads").MessagePort;
import type { MsgRequestObj } from './lib/types.js';