/// <reference types="node" />
export = fetch;
/**
 * @callback FetchCallback
 * @param {Error | null} err
 * @param {Object | null} [json]
 * @param {IncomingMessage} [res]
 */
/**
 * @param {RequestOptions & JsonRequestOptions} options
 * @param {null | string | JsonObject | Readable | FetchCallback} data
 * @param {FetchCallback} [callback]
 * @returns {ClientRequest}
 */
declare function fetch(options: RequestOptions & JsonRequestOptions, data: null | string | JsonObject | Readable | FetchCallback, callback?: FetchCallback | undefined): ClientRequest;
declare namespace fetch {
    export { FetchCallback, RequestOptions, ClientRequest, IncomingMessage, Readable, Failure, Logger, JsonRequestOptions, JsonValue, JsonArray, JsonObject };
}
type RequestOptions = import('http').RequestOptions;
type JsonRequestOptions = {
    timeout?: number | undefined;
    expect?: number | number[] | undefined;
    stream?: boolean | undefined;
    log?: logger.Logger | undefined;
};
type JsonObject = {
    [k: string]: JsonValue;
};
type Readable = import('stream').Readable;
type FetchCallback = (err: Error | null, json?: any | null, res?: http.IncomingMessage | undefined) => any;
type ClientRequest = import('http').ClientRequest;
type IncomingMessage = import('http').IncomingMessage;
type Failure = import('@studio/fail').Failure;
type Logger = import('@studio/log').Logger;
type JsonValue = undefined | null | boolean | number | string | JsonValue[] | JsonObject;
type JsonArray = JsonValue[];
import logger = require("@studio/log");
import http = require("http");