import type { Context, MiddlewareHandler } from 'hono';
import type { AppBindings } from '../lib/types.js';
/**
 * Enhanced security middleware with better performance and comprehensive protection
 */
/**
 * Rate limiting with sliding window algorithm
 */
export declare function rateLimitOptimized(options: {
    windowMs: number;
    maxRequests: number;
    keyGenerator?: (c: Context<AppBindings>) => string;
    skipSuccessfulRequests?: boolean;
    skipFailedRequests?: boolean;
}): MiddlewareHandler<AppBindings>;
/**
 * Enhanced request validation with better error messages
 */
export declare function requestValidation(options: {
    maxBodySize?: number;
    allowedContentTypes?: string[];
    requireContentType?: boolean;
}): MiddlewareHandler<AppBindings>;
/**
 * Advanced security headers with CSP
 */
export declare function enhancedSecurityHeaders(): MiddlewareHandler<AppBindings>;
/**
 * Input sanitization middleware
 */
export declare function inputSanitization(): MiddlewareHandler<AppBindings>;
/**
 * Comprehensive request logging for security monitoring
 */
export declare function securityAuditLog(): MiddlewareHandler<AppBindings>;
/**
 * Simple rate limiter using the hono-rate-limiter package for easier implementation
 */
export declare function simpleRateLimit(options: {
    windowMs: number;
    limit: number;
    keyGenerator?: (c: Context<AppBindings>) => string;
    message?: string;
}): MiddlewareHandler<AppBindings>;
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