1 files changed, 4 insertions, 4 deletions
diff --git a/src/ts/contract_wrappers/exchange_wrapper.ts b/src/ts/contract_wrappers/exchange_wrapper.ts
index 502a1089b..5a576a7fa 100644
--- a/src/ts/contract_wrappers/exchange_wrapper.ts
+++ b/src/ts/contract_wrappers/exchange_wrapper.ts
@@ -3,17 +3,17 @@ import {Web3Wrapper} from '../web3_wrapper';
 import {ECSignature, ZeroExError, ExchangeContract} from '../types';
 import {assert} from '../utils/assert';
 import {ContractWrapper} from './contract_wrapper';
-import * as ExchangeArtifacts from '../artifacts/Exchange.json';
+import * as ExchangeArtifacts from '../../artifacts/Exchange.json';
 import {ECSignatureSchema} from '../schemas/ec_signature_schema';
 
 export class ExchangeWrapper extends ContractWrapper {
     constructor(web3Wrapper: Web3Wrapper) {
         super(web3Wrapper);
     }
-    public async isValidSignatureAsync(maker: string, ecSignature: ECSignature, dataHex: string) {
-        assert.isString('maker', maker);
-        assert.doesConformToSchema('ecSignature', ecSignature, ECSignatureSchema);
+    public async isValidSignatureAsync(dataHex: string, ecSignature: ECSignature, maker: string) {
         assert.isHexString('dataHex', dataHex);
+        assert.doesConformToSchema('ecSignature', ecSignature, ECSignatureSchema);
+        assert.isString('maker', maker);
 
         const senderAddressIfExists = this.web3Wrapper.getSenderAddressIfExistsAsync();
         assert.assert(!_.isUndefined(senderAddressIfExists), ZeroExError.USER_HAS_NO_ASSOCIATED_ADDRESSES);