import type { TypedDataDomain, TypedDataTypes } from './types.js';
/**
 * Convert string to UTF-8 bytes (browser compatible)
 */
export declare const toUtf8Bytes: (str: string) => Uint8Array;
/**
 * Convert hex string to bytes
 */
export declare const hexToBytes: (hex: string) => Uint8Array;
/**
 * Convert bytes to hex string
 */
export declare const bytesToHex: (bytes: Uint8Array) => string;
/**
 * Concatenate multiple Uint8Arrays
 */
export declare const concatBytes: (...arrays: Uint8Array[]) => Uint8Array;
/**
 * Keccak256 hash function
 */
export declare const keccak256: (data: Uint8Array | string) => string;
/**
 * Hash a personal message (for personal_sign/eth_sign)
 */
export declare const hashPersonalMessage: (message: string) => string;
/**
 * Recover address from hash and signature
 */
export declare const recoverAddress: (hash: string, signature: string) => string;
/**
 * Convert address to checksum format
 */
export declare const toChecksumAddress: (address: string) => string;
/**
 * Hash typed data according to EIP-712
 */
export declare const hashTypedData: (domain: TypedDataDomain, types: TypedDataTypes, value: Record<string, any>) => string;