import type { Task } from './types';
/**
 * Given a task that returns a promise, retry the task if it fails with a
 * 429 Too Many Requests or 403 Forbidden response, using the Retry-After
 * header to determine the delay.
 *
 * For response codes other than 429 or 403, or if the Retry-After header
 * is not present or invalid, the task is not retried, throwing the error.
 */
export declare function wrapWithRetry<T>(task: Task<T>, url: string, getRetryAfter: (err: unknown) => number | null, maxRetryAfter: number): Promise<T>;
export declare function getRetryAfter(err: unknown): number | null;