import { SPAServerConfig } from './types';
import { Request, Response } from 'express';
import { IndexMiddleware } from './util';
export declare function createCSPIndexMiddleware(config: SPAServerConfig): Promise<IndexMiddleware>;
export declare function createNonceMiddleware(config: SPAServerConfig): (req: Request<import("express-serve-static-core").ParamsDictionary>, res: Response, next: () => unknown) => void;
export declare function createNonceIndexMiddleware(config: SPAServerConfig): Promise<IndexMiddleware>;