export interface RetryOptions {
    maxRetries?: number;
    maxRetryAfter?: number;
    onRetry?: (attempt: number, delay: number) => void;
}
/**
 * Retries a function when it encounters a rate limit error (429).
 * Uses the retry-after header to determine how long to wait before retrying.
 *
 * @param fn - The async function to execute with retry logic
 * @param options - Configuration options for retry behavior
 * @param options.maxRetries - Maximum number of retry attempts (default: 5)
 * @param options.maxRetryAfter - Maximum wait time in ms regardless of retry-after header value (default: 70000)
 * @param options.onRetry - Optional callback invoked before each retry with attempt number and delay in ms
 * @returns The result of the function if successful
 * @throws The original error if it's not a rate limit error, if max retries exceeded, or if retry-after header is missing
 */
export declare const retryWithBackoff: <T>(fn: () => Promise<T>, options?: RetryOptions) => Promise<T>;