export interface RateLimitBucket {
    limit: number;
    remaining: number;
    resetSeconds: number;
    capturedAt: number;
}
export interface RateLimitState {
    requestsMin?: RateLimitBucket;
    requestsHour?: RateLimitBucket;
    tokensMin?: RateLimitBucket;
    tokensHour?: RateLimitBucket;
    capturedAt: number;
    provider: string;
}
export declare function parseRateLimitHeaders(headers: Record<string, string | undefined>, provider: string): RateLimitState | null;
export declare function recordRateLimit(provider: string, retryAfterSeconds: number): void;
export declare function isRateLimited(provider: string): boolean;
export declare function getRateLimitState(provider: string): RateLimitState | null;
export declare function clearRateLimit(provider: string): void;
export declare function getBackoffSeconds(provider: string, attempt?: number): number;
export declare function getBucketUsedPct(bucket: RateLimitBucket): number;
export declare function getRemainingSecondsNow(bucket: RateLimitBucket): number;
export declare function formatRateLimitCompact(state: RateLimitState): string;
export declare function formatRateLimitDisplay(state: RateLimitState): string;
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