import { BigNumber as BN } from '@0xproject/utils';
export declare const isBigNumber: (v: any) => boolean;
export declare const isNumberLike: (n: any) => boolean;
export declare const toBN: (value: any) => BN;
/**
 * Returns a string representing the value of this BigNumber in normal (fixed-point) notation rounded to dp decimal places using rounding mode rm.
 * @param  {Number} n
 * @param  {Number} dp [decimal places, 0 to 1e+9]
 * @param  {Number} rm [rounding modes 0 to 6, Default value: 1 ROUND_DOWN ] http://mikemcl.github.io/bignumber.js/#round
 * @return {String}
 */
export declare const toFixed: (n: any, dp?: number, rm?: number) => string;