/// <reference types="node" />
/// <reference types="jest" />
import { HelmetData } from "react-helmet";
export interface ILayoutOptions {
    [key: string]: any;
    assets: {
        [key: string]: string;
    };
    body: string;
    initialState: string;
    head: HelmetData;
}
export interface IReactEngineOptions {
    layout?: string;
    isProdEnv?: boolean;
}
export declare function getInitialState(options: any): string;
export declare function getMarkupWithDoctype(markup: string): string;
export declare function generateMarkup(req: NodeRequire, filePath: string, options: any, defaultLayout: string): string;
declare const _default: (engineOptions?: IReactEngineOptions, req?: NodeRequire) => (filePath: string, options: any, callback: any) => any;
export default _default;