import Web3 from 'web3';
import { NetworkId } from './types';
/**
 * Checks if the contract in the given address has the given method
 *
 * @param web3 - Web3 instance
 * @param contractAddress - address of the contract to check
 * @param signatureHash - keccak256 of the method signature
 *
 * @returns
 * true if method exists, false if not
 */
export declare const hasMethod: (web3: Web3, contractAddress: string, signatureHash: string) => Promise<boolean>;
/**
 * Checks if the given web3 instance has accounts to sign txs
 *
 * @param web3 - Web3 instance
 *
 * @returns
 * true if has accounts, false if not
 */
export declare const hasAccounts: (web3: Web3) => Promise<boolean>;
/**
 * Gets the unlocked address of the given web3 instance
 *
 * @param web3 - Web3 instance
 *
 * @returns Current address
 */
export declare const getCurrentAddress: (web3: Web3) => Promise<string>;
/**
 * Validates the given address
 *
 * @param address
 *
 * @returns
 * true if valid, false if not
 */
export declare const isValidAddress: (address: string) => any;
/**
 * Validates the given checksum address for the given networkId
 *
 * @param address
 * @param networkId - chanetworkIdnId where checksummed address should be valid
 *
 * @returns
 * true if valid, false if not
 */
export declare const isValidChecksumAddress: (address: string, networkId?: NetworkId | undefined) => any;
/**
 * Generates checksum address
 *
 * @param address
 * @param networkId - networkId where checksummed address should be valid
 *
 * @returns
 * Checksummed address
 */
export declare const toChecksumAddress: (address: string, networkId?: NetworkId | undefined) => any;
/**
 * Validates the given label
 *
 * @param label - label to validate
 *
 * @returns
 * true if valid, false if not
 */
export declare const isValidLabel: (label: string) => boolean;
/**
 * Validates the given domain syntax
 *
 * @param domain - domain to validate
 *
 * @returns
 * true if valid, false if not
 */
export declare const isValidDomain: (domain: string) => boolean;
/**
 * Validates the given domain TLD
 *
 * @param domain - domain to validate
 *
 * @returns
 * true if valid, false if not
 */
export declare const isValidTld: (domain: string) => boolean;
/**
 * Returns namehash of the given domain
 *
 * @param domain - domain to apply namehash function
 *
 * @returns
 * namehash of the given domain
 */
export declare const namehash: (domain: string) => any;
/**
 * Returns '0x' + keccak256 of the given label
 *
 * @param label - label to apply keccak256 function
 *
 * @returns
 * '0x' + keccak256 of the given label
 */
export declare const labelhash: (label: string) => string;