2 files changed, 4 insertions, 0 deletions
diff --git a/src/contract_wrappers/exchange_wrapper.ts b/src/contract_wrappers/exchange_wrapper.ts
index 40f22bd28..ded0d3519 100644
--- a/src/contract_wrappers/exchange_wrapper.ts
+++ b/src/contract_wrappers/exchange_wrapper.ts
@@ -125,6 +125,9 @@ export class ExchangeWrapper extends ContractWrapper {
         if (signedOrder.taker !== constants.NULL_ADDRESS && signedOrder.taker !== senderAddress) {
             throw new Error(FillOrderValidationErrs.NOT_A_TAKER);
         }
+        if (signedOrder.expirationUnixTimestampSec.lessThan(Date.now() / 1000)) {
+            throw new Error(FillOrderValidationErrs.EXPIRED);
+        }
     }
     private async getExchangeInstanceOrThrowAsync(): Promise<ExchangeContract> {
         const contractInstance = await this.instantiateContractIfExistsAsync((ExchangeArtifacts as any));
diff --git a/src/types.ts b/src/types.ts
index 216026b3d..7c5e1825d 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -88,6 +88,7 @@ export type ExchangeContractErrs = keyof typeof ExchangeContractErrs;
 export const FillOrderValidationErrs = strEnum([
     'FILL_AMOUNT_IS_ZERO',
     'NOT_A_TAKER',
+    'EXPIRED',
 ]);
 export type FillOrderValidationErrs = keyof typeof FillOrderValidationErrs;