import type { RequestInfo, RequestInit, RetryOptions } from './types';
/**
 * Default retry options for fetch operations
 * - maxRetries: 3 attempts
 * - initialBackoff: 300ms
 * - maxBackoff: 10000ms (10s)
 * - jitter: 20% randomness to prevent request floods
 * - retryableStatusCodes: [429, 500, 502, 503, 504]
 * - retryNetworkErrors: true
 * - backoffFactor: 2 (exponential backoff)
 */
export declare const DEFAULT_RETRY_OPTIONS: Required<RetryOptions>;
/**
 * Calculates backoff time with exponential increase and jitter
 * @param attempt Current attempt number (0-based)
 * @param options Retry configuration options
 * @returns Backoff time in milliseconds
 */
export declare const calculateBackoff: (attempt: number, { initialBackoff, backoffFactor, maxBackoff, jitter }: Required<RetryOptions>) => number;
/**
 * Fetch with automatic exponential backoff retry for network errors and specified status codes
 * Also supports request cancellation via AbortSignal
 */
export declare const fetchWithRetry: (input: RequestInfo, init?: RequestInit, options?: RetryOptions | false) => Promise<Response>;