/**
 * Authentication Middleware
 *
 * Provides JWT and API key authentication for HTTP endpoints
 */
import { Request, Response, NextFunction } from "express";
import { JwtPayload } from "../auth/jwt.js";
declare global {
    namespace Express {
        interface Request {
            user?: JwtPayload;
            authMethod?: "jwt" | "api_key";
        }
    }
}
export interface AuthMiddlewareOptions {
    apiKey?: string;
    jwtPublicKey: string;
    requireAuth?: boolean;
}
/**
 * Create authentication middleware that supports both JWT and API key
 */
export declare function createAuthMiddleware(options: AuthMiddlewareOptions): (req: Request, res: Response, next: NextFunction) => void;
/**
 * Middleware to require JWT authentication (no API key fallback)
 */
export declare function requireJWT(jwtPublicKey: string): (req: Request, res: Response, next: NextFunction) => void;
/**
 * Optional authentication middleware (allows unauthenticated requests)
 */
export declare function optionalAuth(options: AuthMiddlewareOptions): (req: Request, res: Response, next: NextFunction) => void;