import { RequestHandler } from "express";
import { JwtPayload, VerifyOptions } from "jsonwebtoken";
declare global {
    namespace Express {
        interface Request {
            user?: JwtPayload;
            ctx?: {
                agent?: {
                    did?: string;
                    kid?: string;
                    session?: string;
                    scopes?: string[];
                    delegationRef?: string;
                    confidence?: string;
                    verifiedAt?: number;
                };
            };
        }
    }
}
export interface JWTAuthMiddlewareConfig extends VerifyOptions {
    secret: string;
}
/**
 * Middleware to authenticate requests using a JWT.
 * @param config - Configuration object containing the JWT secret and verify options.
 * @returns Express middleware function.
 *
 * @example
 * ```ts
 * const middleware = jwtAuthMiddleware({
 *   secret: process.env.JWT_SECRET!,
 *   algorithms: ["HS256"],
 *   issuer: "https://example.com",
 *   audience: "https://example.com",
 *   subject: "user-id",
 *   expiresIn: "1h",
 *   notBefore: "1h",
 *   clockTolerance: 30,
 * });
 * ```
 */
export declare function jwtAuthMiddleware(config: JWTAuthMiddlewareConfig): RequestHandler;