/**
 * @file Rate Limiter
 * @version 1.0.0
 * @status STABLE - DO NOT MODIFY WITHOUT TESTS
 * @lastModified 2024-06-07
 *
 * Simple in-memory rate limiter to prevent API abuse
 *
 * IMPORTANT:
 * - Keep memory usage reasonable
 * - Use sliding window algorithm for accurate rate limiting
 *
 * Functionality:
 * - Request rate limiting
 * - Different limits for different operations
 * - Sliding window algorithm
 */
interface RateLimitOptions {
    windowMs: number;
    maxRequests: number;
}
export declare class RateLimiter {
    private limits;
    private buckets;
    /**
     * Create a new rate limiter
     */
    constructor();
    /**
     * Set a rate limit for a specific operation
     * @param operation Operation name
     * @param options Rate limit options
     */
    setLimit(operation: string, options: RateLimitOptions): void;
    /**
     * Check if an operation for a specific identity is rate limited
     * @param operation Operation name
     * @param identity Identity string (e.g., IP, user ID)
     * @returns True if the operation is allowed, false if rate limited
     */
    isAllowed(operation: string, identity: string): boolean;
    /**
     * Check if an operation is allowed and record it
     * @param operation Operation name
     * @param identity Identity string
     * @returns True if allowed, false if rate limited
     */
    consume(operation: string, identity: string): boolean;
    /**
     * Get remaining requests for an operation and identity
     * @param operation Operation name
     * @param identity Identity string
     * @returns Number of remaining requests in the current window
     */
    getRemainingRequests(operation: string, identity: string): number;
    /**
     * Reset rate limit for an operation and identity
     * @param operation Operation name
     * @param identity Identity string
     */
    reset(operation: string, identity: string): void;
    /**
     * Clean up old entries to prevent memory leaks
     */
    private cleanup;
}
export declare const rateLimiter: RateLimiter;
export {};