Merge pull request #1517 from 0xProject/feature/bignumber-8.0

Bignumber 8.0

1 files changed, 2 insertions, 6 deletions

diff --git a/packages/web3-wrapper/src/utils.ts b/packages/web3-wrapper/src/utils.ts
index c68587632..1aba3c75a 100644
--- a/packages/web3-wrapper/src/utils.ts
+++ b/packages/web3-wrapper/src/utils.ts
@@ -2,10 +2,6 @@ import { BigNumber } from '@0x/utils';
 import * as _ from 'lodash';
 
 export const utils = {
-    isBigNumber(value: any): boolean {
-        const isBigNumber = _.isObject(value) && value.isBigNumber;
-        return isBigNumber;
-    },
     convertHexToNumber(value: string): number {
         const valueBigNumber = new BigNumber(value);
         const valueNumber = valueBigNumber.toNumber();
@@ -20,7 +16,7 @@ export const utils = {
     },
     convertAmountToBigNumber(value: string | number | BigNumber): BigNumber {
         const num = value || 0;
-        const isBigNumber = utils.isBigNumber(num);
+        const isBigNumber = BigNumber.isBigNumber(num);
         if (isBigNumber) {
             return num as BigNumber;
         }
@@ -37,7 +33,7 @@ export const utils = {
         const hexBase = 16;
         const valueHex = valueBigNumber.toString(hexBase);
 
-        return valueBigNumber.lessThan(0) ? `-0x${valueHex.substr(1)}` : `0x${valueHex}`;
+        return valueBigNumber.isLessThan(0) ? `-0x${valueHex.substr(1)}` : `0x${valueHex}`;
     },
     numberToHex(value: number): string {
         if (!isFinite(value) && !utils.isHexStrict(value)) {