import { NextRequest, NextResponse } from 'next/server';
import { CentinelMiddleware } from './core/CentinelMiddleware';
import type { CentinelConfig } from './types';
export default function middleware(req: NextRequest): Promise<NextResponse<unknown>>;
/**
 * Creates a Centinel middleware function with sequential validation.
 * The validation runs before allowing the request to proceed.
 *
 * @param config - Centinel configuration object
 * @returns Configured middleware function
 *
 * @example
 * ```typescript
 * // middleware.ts
 * import { createCentinelMiddleware } from '@centinel/nextjs';
 *
 * export default createCentinelMiddleware({
 *   siteKey: process.env.CENTINEL_SITE_KEY!,
 *   secretKey: process.env.CENTINEL_SECRET_KEY!
 * });
 *
 * export const config = {
 *   matcher: ['/api/:path*', '/dashboard/:path*']
 * };
 * ```
 */
export declare function createCentinelMiddleware(config: CentinelConfig): (req: NextRequest) => Promise<NextResponse<unknown>>;
/**
 * Creates a Centinel middleware function using environment variables for configuration.
 *
 * @returns Configured middleware function
 *
 * @example
 * ```typescript
 * // middleware.ts
 * import { createCentinelMiddlewareFromEnv } from '@centinel/nextjs';
 *
 * export default createCentinelMiddlewareFromEnv();
 *
 * export const config = {
 *   matcher: ['/api/:path*', '/dashboard/:path*']
 * };
 * ```
 */
export declare function createCentinelMiddlewareFromEnv(): (req: NextRequest) => Promise<NextResponse<unknown>>;
export { CentinelMiddleware };
export type { CentinelConfig };