Add expiry buffer

1 files changed, 4 insertions, 1 deletions

diff --git a/packages/asset-buyer/src/utils/order_utils.ts b/packages/asset-buyer/src/utils/order_utils.ts
index 27db73257..62166eb76 100644
--- a/packages/asset-buyer/src/utils/order_utils.ts
+++ b/packages/asset-buyer/src/utils/order_utils.ts
@@ -5,9 +5,12 @@ import { constants } from '../constants';
 
 export const orderUtils = {
     isOrderExpired(order: SignedOrder): boolean {
+        return orderUtils.willOrderExpire(order, 0);
+    },
+    willOrderExpire(order: SignedOrder, secondsFromNow: number): boolean {
         const millisecondsInSecond = 1000;
         const currentUnixTimestampSec = new BigNumber(Date.now() / millisecondsInSecond).round();
-        return order.expirationTimeSeconds.lessThan(currentUnixTimestampSec);
+        return order.expirationTimeSeconds.lessThan(currentUnixTimestampSec.minus(secondsFromNow));
     },
     calculateRemainingMakerAssetAmount(order: SignedOrder, remainingTakerAssetAmount: BigNumber): BigNumber {
         if (remainingTakerAssetAmount.eq(0)) {