3 files changed, 7 insertions, 5 deletions
diff --git a/packages/contract-wrappers/src/utils/assert.ts b/packages/contract-wrappers/src/utils/assert.ts
index 3f02ed052..d30c6b29c 100644
--- a/packages/contract-wrappers/src/utils/assert.ts
+++ b/packages/contract-wrappers/src/utils/assert.ts
@@ -70,7 +70,7 @@ export const assert = {
     /*
      * Asserts that all the orders have the same value for the provided propertyName
      * If the value parameter is provided, this asserts that all orders have the prope
-    */
+     */
     ordersHaveAtMostOneUniqueValueForProperty(orders: Order[], propertyName: string, value?: any): void {
         const allValues = _.map(orders, order => _.get(order, propertyName));
         sharedAssert.hasAtMostOneUniqueValue(
diff --git a/packages/contract-wrappers/src/utils/exchange_transfer_simulator.ts b/packages/contract-wrappers/src/utils/exchange_transfer_simulator.ts
index f374d509b..4b75ea386 100644
--- a/packages/contract-wrappers/src/utils/exchange_transfer_simulator.ts
+++ b/packages/contract-wrappers/src/utils/exchange_transfer_simulator.ts
@@ -72,10 +72,10 @@ export class ExchangeTransferSimulator {
         }
         const balance = await this._store.getBalanceAsync(tokenAddress, from);
         const proxyAllowance = await this._store.getProxyAllowanceAsync(tokenAddress, from);
-        if (proxyAllowance.lessThan(amountInBaseUnits)) {
+        if (proxyAllowance.isLessThan(amountInBaseUnits)) {
             ExchangeTransferSimulator._throwValidationError(FailureReason.ProxyAllowance, tradeSide, transferType);
         }
-        if (balance.lessThan(amountInBaseUnits)) {
+        if (balance.isLessThan(amountInBaseUnits)) {
             ExchangeTransferSimulator._throwValidationError(FailureReason.Balance, tradeSide, transferType);
         }
         await this._decreaseProxyAllowanceAsync(tokenAddress, from, amountInBaseUnits);
diff --git a/packages/contract-wrappers/src/utils/utils.ts b/packages/contract-wrappers/src/utils/utils.ts
index 0b3270e78..ab69385e7 100644
--- a/packages/contract-wrappers/src/utils/utils.ts
+++ b/packages/contract-wrappers/src/utils/utils.ts
@@ -7,13 +7,15 @@ import { constants } from './constants';
 export const utils = {
     getCurrentUnixTimestampSec(): BigNumber {
         const milisecondsInSecond = 1000;
-        return new BigNumber(Date.now() / milisecondsInSecond).round();
+        return new BigNumber(Date.now() / milisecondsInSecond).integerValue();
     },
     getCurrentUnixTimestampMs(): BigNumber {
         return new BigNumber(Date.now());
     },
     numberPercentageToEtherTokenAmountPercentage(percentage: number): BigNumber {
-        return Web3Wrapper.toBaseUnitAmount(constants.ONE_AMOUNT, constants.ETHER_TOKEN_DECIMALS).mul(percentage);
+        return Web3Wrapper.toBaseUnitAmount(constants.ONE_AMOUNT, constants.ETHER_TOKEN_DECIMALS).multipliedBy(
+            percentage,
+        );
     },
     removeUndefinedProperties<T extends object>(obj: T): Partial<T> {
         return _.pickBy(obj);