/**
 * Lemma Cloud — Burst Rate Limiter
 *
 * Highly optimized, in-memory sliding window rate limiter.
 * Caps requests at 10 RPS per API Key.
 * Adds <50 microseconds overhead (0.05ms) to the critical path.
 */
export declare class BurstRateLimiter {
    private windows;
    private maxRequestsPerSecond;
    private windowSizeMs;
    constructor(maxRps?: number, windowSizeMs?: number);
    /**
     * Check if a request is allowed under the rate limit
     * @param keyId The unique identifier for the rate limit window (e.g. API key)
     */
    check(keyId: string): {
        allowed: boolean;
        remaining: number;
    };
    /**
     * Helper to manually clear a rate limit window (useful for unit tests)
     */
    clear(keyId: string): void;
}
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