import { NestMiddleware } from '@nestjs/common';
import e, { Request, Response, NextFunction } from 'express';
import { SecurityService } from '../services/security.service';
import { SecurityConfigInterface } from '../interfaces/security-config.interface';
export declare class SecurityMiddleware implements NestMiddleware {
    private readonly securityService;
    private readonly config?;
    constructor(securityService: SecurityService, config?: SecurityConfigInterface);
    use(req: Request, res: Response, next: NextFunction): Promise<e.Response<any, Record<string, any>>>;
    private getClientIp;
    private checkSuspiciousActivity;
}
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