/**
 * Rate Limit Middleware
 *
 * Limits connections and message rate per IP/user.
 */
import type { StreamMiddleware, RateLimitConfig } from '@plyaz/types/core';
/**
 * Create a rate limit middleware.
 *
 * @param config - Rate limit configuration
 * @returns Middleware function
 *
 * @example
 * ```typescript
 * const middleware = createRateLimitMiddleware({
 *   maxConnectionsPerIp: 5,
 *   maxMessagesPerSecond: 50,
 * });
 *
 * chain.use(middleware);
 * ```
 */
export declare function createRateLimitMiddleware(config?: RateLimitConfig): StreamMiddleware;
/**
 * Clean up rate limit tracking for a connection.
 * Call when a connection is closed.
 *
 * @param connectionId - Connection ID to clean up
 * @param ip - IP address of the connection
 */
export declare function cleanupRateLimitTracking(connectionId: string, ip?: string): void;
/**
 * Get current rate limit stats.
 */
export declare function getRateLimitStats(): {
    connectionsByIp: Map<string, number>;
    totalConnections: number;
};
//# sourceMappingURL=RateLimitMiddleware.d.ts.map