/**
 * Simple rate limiter to avoid overwhelming state licensing sites
 *
 * Implements token bucket algorithm per-domain
 */
declare class RateLimiter {
    private buckets;
    private defaultMaxTokens;
    private defaultRefillRate;
    /**
     * Domain-specific rate limits
     */
    private limits;
    /**
     * Extract domain from URL
     */
    private getDomain;
    /**
     * Get or create bucket for domain
     */
    private getBucket;
    /**
     * Refill bucket based on time elapsed
     */
    private refill;
    /**
     * Check if request is allowed and consume a token
     */
    acquire(url: string): Promise<boolean>;
    /**
     * Wait until a token is available, then acquire
     */
    acquireWithWait(url: string, maxWaitMs?: number): Promise<boolean>;
    /**
     * Get current state for debugging
     */
    getStats(): Record<string, {
        tokens: number;
        maxTokens: number;
    }>;
}
export declare const rateLimiter: RateLimiter;
export default rateLimiter;
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