import { Result } from 'ethers';
/**
 * Utility functions for Web3 decoding and data processing
 */
/**
 * Check if ABI type is a tuple
 */
export declare function isTupleType(abiType: string): boolean;
/**
 * Check if ABI type is an array
 */
export declare function isArrayType(abiType: string): boolean;
/**
 * Process ABI outputs and convert Result to object with named fields
 */
export declare function processOutputTypes(outputs: readonly any[], decoded: Result): Record<string, any>;
/**
 * Decode contract function output using ABI
 * @param abi - Contract ABI
 * @param functionName - Function name to decode
 * @param output - Raw output data
 * @returns Decoded output as object with named fields
 */
export declare function decoder(abi: any[], functionName: string, output: any): Record<string, any> | null;
/**
 * Convert hex string to number
 */
export declare function hexToNumber(hex: string): number;
/**
 * Convert number to hex string
 */
export declare function numberToHex(num: number): string;
/**
 * Validate Ethereum address
 */
export declare function isValidAddress(address: string): boolean;
/**
 * Format address to checksummed version
 */
export declare function toChecksumAddress(address: string): string;
/**
 * Sleep for specified milliseconds
 */
export declare function sleep(ms: number): Promise<void>;
/**
 * Retry function with exponential backoff
 * @param fn - Async function to retry
 * @param maxRetries - Maximum number of retries
 * @param baseDelay - Base delay in milliseconds (default: 1000)
 * @returns Result of the function
 */
export declare function retryWithBackoff<T>(fn: () => Promise<T>, maxRetries?: number, baseDelay?: number): Promise<T>;