import { TEth } from '../models/TEth';
export declare namespace $is {
    function Number<T>(val: number | any): val is number;
    function notNull<T>(val: T): boolean;
    function notEmpty<T extends string | any[]>(val: T): boolean;
    function empty<T extends string | any[] | number | Uint8Array>(val: T): boolean;
    function BigInt<T>(val: bigint | any): val is bigint;
    function Address(val: string, message?: string): val is TEth.Address;
    function Promise(val: any): val is Promise<any>;
    function TxHash(val: string | TEth.Hex): boolean;
    function Hex(str: string | any): str is TEth.Hex;
    function HexBytes32(str: string | any): str is TEth.Hex;
    function Array(val: any): val is any[];
    function ArrayOfStrings(val: any): val is string[];
    const BROWSER: boolean;
    const NODE: boolean;
}