export declare class EthereumUtils {
    static toHex(value: any): string;
    private static readonly SHA3_NULL_S;
    static sha3(value: any): string | null;
    private static numberToHex;
    private static hexToBytes;
    private static isHexStrict;
    private static checkAddressChecksum;
    private static isAddress;
    private static isBigNumber;
    private static utf8ToHex;
    private static isObject;
}