import nodeFetch from 'node-fetch';
import { SelfThrottle } from 'self-throttle';
import { Duration, Instant } from './temporal';
export declare type Fetch = typeof nodeFetch;
declare type BytesParams = {
    gigabytes?: number;
    megabytes?: number;
    kilobytes?: number;
    bytes?: number;
};
export declare class Bytes {
    readonly bytes: number;
    private constructor();
    static from(from: BytesParams): Bytes;
}
export declare type SnarfetchOptions = {
    fetch?: Fetch;
    throttle?: new () => SelfThrottle;
    gcInterval?: Duration;
    maximumStorageBytes?: Bytes;
    maximumStoragePerTargetBytes?: Bytes;
    now?: () => Instant;
};
export declare const SNARFETCH_DEFAULTS: Required<SnarfetchOptions>;
export {};