import { type NestMiddleware } from '@nestjs/common';
import type { NextFunction, Request, Response } from 'express';
import { OpraHttpNestjsAdapter } from './opra-http-nestjs-adapter.js';
/**
 * OpraMiddleware
 *
 * NestJS middleware that creates an OPRA context (HttpContext) for each HTTP request
 * and adds it to the request.
 */
export declare class OpraMiddleware implements NestMiddleware {
    protected opraAdapter: OpraHttpNestjsAdapter;
    constructor(opraAdapter: OpraHttpNestjsAdapter);
    /**
     * Processes requests and creates the OPRA context.
     *
     * @param req - Express request object.
     * @param res - Express response object.
     * @param next - Function that calls the next middleware.
     */
    use(req: Request, res: Response, next: NextFunction): void;
}