export declare class FormatUtils {
    static formatBytes(bytes: number): string;
    static formatDuration(ms: number): string;
    static formatPercentage(part: number, total: number): string;
    static formatSpeed(bytesPerSecond: number): string;
    static formatETA(remainingBytes: number, bytesPerSecond: number): string;
    static truncateString(str: string, maxLength: number, suffix?: string): string;
    static formatTimestamp(timestamp: number | Date): string;
    static formatRelativeTime(timestamp: number | Date): string;
    static formatNumber(num: number): string;
    static formatFileSize(bytes: number): string;
    static formatProgress(current: number, total: number): string;
}
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