export interface RateLimitSnapshot {
    requestsRemaining?: number;
    requestsLimit?: number;
    requestsResetAt?: number;
    inputTokensRemaining?: number;
    inputTokensLimit?: number;
    inputTokensResetAt?: number;
    outputTokensRemaining?: number;
    outputTokensResetAt?: number;
}
export declare function estimateInputTokens(body: unknown): number;
export declare class RateLimitBucket {
    private requestsRemaining;
    private requestsResetAt;
    private requestsLimit;
    private inputTokensRemaining;
    private inputTokensResetAt;
    private inputTokensLimit;
    private outputTokensRemainingVal;
    private frozenUntil;
    resetForTests(): void;
    get outputTokensRemaining(): number;
    update(snap: RateLimitSnapshot): void;
    freeze(retryAfterMs: number): void;
    private maybeResetWindows;
    acquirePermit(estimatedInputTokens: number, signal?: AbortSignal): Promise<void>;
}
export declare const globalRateLimitBucket: RateLimitBucket;