export interface RateLimiterOptions {
    maxConcurrent?: number;
    delayMs?: number;
    maxQueueSize?: number;
}
export declare class RateLimiter {
    protected options: RateLimiterOptions;
    private running;
    private queue;
    private lastExecutionTime;
    constructor(options?: RateLimiterOptions);
    schedule<T>(fn: () => Promise<T>): Promise<T>;
    private waitForSlot;
    private processQueue;
    getStats(): {
        running: number;
        queued: number;
        maxConcurrent: number | undefined;
    };
    clear(): void;
}
export declare class AdaptiveRateLimiter extends RateLimiter {
    private consecutiveErrors;
    private baseDelayMs;
    constructor(options?: RateLimiterOptions);
    schedule<T>(fn: () => Promise<T>): Promise<T>;
    private isRateLimitError;
}