import { AbortOptions, Semaphore } from '@mithic/commons';
/** A semaphore that limits access to resources by issuing fixed number of permits per period. */
export declare class RateLimiter implements Semaphore {
    /** The interval. */
    private readonly interval;
    /** Function to return the current time. */
    private readonly now;
    private semaphore;
    private resetQueue;
    private resetTimer;
    constructor(
    /** Total number of permits over given interval. */
    limit?: number, 
    /** The interval. */
    interval?: number, 
    /** Function to return the current time. */
    now?: () => number);
    acquire(options?: AbortOptions): Promise<void>;
    tryAcquire(): boolean;
    release(): void;
    private triggerPermitReset;
    private resetLimit;
}
//# sourceMappingURL=ratelimiter.d.ts.map