import BN from 'bn.js';
import Decimal from 'decimal.js';
/**
 * Check if string is HEX, requires a 0x in front
 *
 * @method isHexStrict
 * @param {String} hex to be checked
 * @returns {Boolean}
 */
export declare function isHexStrict(hex: string | number): boolean;
/**
 * Takes an input and transforms it into an BN
 *
 * @method toBN
 * @param {Number|String|BN} number, string, HEX string or BN
 * @return {BN} BN
 */
export declare function toBN(number: number | string): BN;
/**
 * Converts value to it's number representation
 *
 * @method hexToNumber
 * @param {String|Number|BN} value
 * @return {String}
 */
export declare function hexToNumber(value: string | number): string | number;
/**
 * Converts value to it's hex representation
 *
 * @method numberToHex
 * @param {String|Number|BN} value
 * @return {String}
 */
export declare function numberToHex(value: number | string): string;
/**
 * Should be called to get hex representation (prefixed by 0x) of utf8 string
 *
 * @method utf8ToHex
 * @param {String} str
 * @returns {String} hex representation of input string
 */
export declare function utf8ToHex(str: string): string;
/**
 * Convert a hexadecimal chainId to decimal
 * @param chainId
 */
export declare function chainIdHexToNumber(chainId: string | number): number;
/**
 * Converts to a checksum address
 *
 * @method toChecksumAddress
 * @param {String} address the given HEX address
 * @return {String}
 */
export declare function toChecksumAddress(address: string): string;
/**
 * Converts value to it's decimal representation in string
 * @param value The value to convert
 * @returns The decimal representation of the given value
 */
export declare function toDecimal(value: string | number): Decimal;