import type { HttpMiddleware } from "@egomobile/http-server";
import type { JsonVersion } from "../types/index.js";
import type { Nilable } from "../types/internal.js";
import type { IBodyParserMiddlewareOptions } from "./index.js";
/**
 * Options for 'json()' function.
 */
export interface IJsonOptions extends IBodyParserMiddlewareOptions {
    /**
     * The custom version.
     */
    version?: Nilable<JsonVersion>;
}
/**
 * Creates a new middleware, which reads input data as UTF-8
 * string and tries to parse it to JSON object and writes this
 * object to `body` property of the current request context.
 *
 * @param {Nilable<IJsonOptions>} [options] Custom options.
 */
export declare function json(): HttpMiddleware<any, any>;
export declare function json(options: Nilable<IJsonOptions>): HttpMiddleware<any, any>;