/**
 * Utility functions for working with providers and signers
 */
import { HDNodeWallet } from "ethers";
import { Address } from "viem";
/**
 * Creates an ethers wallet from a mnemonic phrase
 * @param mnemonic - Mnemonic phrase
 * @param index - Account index (default: 0)
 * @returns Ethers wallet
 */
export declare function getWalletFromMnemonic(mnemonic: string): HDNodeWallet;
/**
 * Validates if a string is a valid Ethereum address
 * @param address - The address to validate
 * @returns True if the address is valid
 */
export declare function isValidAddress(address: string): address is Address;
/**
 * Formats an amount for display with a specified number of decimals
 * @param amount - Amount to format
 * @param decimals - Number of decimals
 * @param maxDecimals - Maximum number of decimals to display
 * @returns Formatted amount string
 */
export declare function formatAmount(amount: bigint, decimals: number, maxDecimals?: number): string;