/**
 * Retry utility with exponential backoff
 */
export interface RetryOptions {
    maxAttempts?: number;
    baseDelay?: number;
    maxDelay?: number;
    shouldRetry?: (error: any) => boolean;
    onRetry?: (attempt: number, error: any, delay: number) => void;
}
/**
 * Check if error is a network error (no internet connection)
 */
export declare function isNetworkError(error: any): boolean;
/**
 * Check if error is a timeout error
 */
export declare function isTimeoutError(error: any): boolean;
/**
 * Wrap an async function with retry logic
 */
export declare function withRetry<T>(fn: () => Promise<T>, options?: RetryOptions): Promise<T>;
/**
 * Create a fetch with timeout
 */
export declare function fetchWithTimeout(url: string, options?: RequestInit & {
    timeout?: number;
}): Promise<Response>;