/**
 Original work Copyright (c) 2020 Burst Apps Team
 */
import './internal/padStartPolyfill';
import BigNumber from 'bignumber.js';
/**
 * Arbitrary length decimal to hexadecimal conversion
 *
 * >  Negative numbers are expressed as Two's Complement (https://en.wikipedia.org/wiki/Two%27s_complement)
 *
 * Credits to AJ ONeal for the two's complements stuff
 * https://coolaj86.com/articles/convert-decimal-to-hex-with-js-bigints/
 *
 * @param decimal A decimal string or BigNumber representation
 * @param padding If set the hex string will be padded to given number, 8 or 16 or more
 * @return A hexadecimal string
 *
 * @category conversion
 */
export declare const convertDecStringToHexString: (decimal: BigNumber | string, padding?: number) => string;