/**
 * Utility functions for converting between different units and formats
 */
/**
 * Convert IOTX string to Rau (BigInt)
 * 1 IOTX = 10^18 Rau
 */
export declare function iotxToRau(iotx: string): bigint;
/**
 * Convert Rau (BigInt) to IOTX string
 */
export declare function rauToIotx(rau: bigint): string;
/**
 * Convert gas price Rau to QEv (12 decimals)
 */
export declare function rauToQev(rau: bigint): string;
/**
 * Convert QEv to Rau
 */
export declare function qevToRau(qev: string): bigint;
/**
 * Parse human-readable duration (e.g., "7d", "30d") to days
 */
export declare function parseDuration(duration: string): number;
/**
 * Format duration in days to human-readable string
 */
export declare function formatDuration(days: number): string;
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