/**
 * Download utilities with progress tracking
 */
export interface DownloadOptions {
    url: string;
    destination: string;
    progressLabel?: string;
    expectedSize?: number;
    timeout?: number;
}
/**
 * Format bytes into human-readable format
 */
export declare function formatBytes(bytes: number): string;
/**
 * Download a file with progress tracking
 */
export declare function downloadWithProgress(options: DownloadOptions): Promise<void>;
/**
 * Download a file with retry logic and exponential backoff
 */
export declare function downloadWithRetry(options: DownloadOptions, maxRetries?: number): Promise<void>;
/**
 * Download and extract a ZIP file
 */
export declare function downloadAndExtract(url: string, extractPath: string, progressLabel?: string): Promise<void>;
/**
 * Check if a URL is accessible
 */
export declare function checkUrlAccessible(url: string): Promise<boolean>;
/**
 * Get file size from URL without downloading
 */
export declare function getRemoteFileSize(url: string): Promise<number | null>;
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