/**
 * Format a token amount to a human-readable string
 * @param amount Amount in wei
 * @param decimals Number of decimals
 * @param symbol Token symbol
 */
export declare function formatTokenAmount(amount: bigint, decimals?: number, symbol?: string): string;
/**
 * Format an address with truncation
 * @param address Address to format
 * @param prefixLength Number of characters to keep at the beginning
 * @param suffixLength Number of characters to keep at the end
 */
export declare function formatAddress(address: string, prefixLength?: number, suffixLength?: number): string;
/**
 * Format a date to ISO string or custom format
 * @param timestamp Timestamp in seconds
 * @param format Format string (currently only supports 'iso')
 */
export declare function formatDate(timestamp: number, format?: 'iso' | 'relative'): string;
/**
 * Format a number with thousand separators
 * @param value Number to format
 * @param decimals Number of decimal places
 */
export declare function formatNumber(value: number, decimals?: number): string;
/**
 * Format a percentage
 * @param value Percentage value (0-100)
 * @param decimals Number of decimal places
 */
export declare function formatPercentage(value: number, decimals?: number): string;