import { TEth } from '../../models/TEth';
export declare namespace $str {
    function isNullOrWhiteSpace(x: string): boolean;
    function sliceFromEnd(hex: string, positionBits: number, bits: number): string;
    function writeFromEnd(hex: TEth.Hex, hexIn: TEth.Hex | TEth.HexRaw, positionBits: number, bits: number): TEth.Hex;
    function fromHex(hex: TEth.Hex): string;
    function removeRgxMatches(str: string, ...matches: RegExpMatchArray[]): string;
    function removeRgxMatch(str: string, match: RegExpMatchArray): string;
}