Rename variables, create private validation methods in token wrappers

5 files changed, 212 insertions, 189 deletions

diff --git a/packages/contracts/test/asset_proxy_dispatcher/dispatcher.ts b/packages/contracts/test/asset_proxy_dispatcher/dispatcher.ts
index b5630d807..6e0ec3dee 100644
--- a/packages/contracts/test/asset_proxy_dispatcher/dispatcher.ts
+++ b/packages/contracts/test/asset_proxy_dispatcher/dispatcher.ts
@@ -29,7 +29,7 @@ describe('AssetProxyDispatcher', () => {
     let makerAddress: string;
     let takerAddress: string;
 
-    let zrx: DummyERC20TokenContract;
+    let zrxToken: DummyERC20TokenContract;
     let erc20Proxy: ERC20ProxyContract;
     let erc721Proxy: ERC721ProxyContract;
     let assetProxyDispatcher: AssetProxyDispatcherContract;
@@ -46,11 +46,11 @@ describe('AssetProxyDispatcher', () => {
         erc20Wrapper = new ERC20Wrapper(deployer, provider, usedAddresses, owner);
         erc721Wrapper = new ERC721Wrapper(deployer, provider, usedAddresses, owner);
 
-        [zrx] = await erc20Wrapper.deployDummyERC20TokensAsync();
-        erc20Proxy = await erc20Wrapper.deployERC20ProxyAsync();
+        [zrxToken] = await erc20Wrapper.deployDummyTokensAsync();
+        erc20Proxy = await erc20Wrapper.deployProxyAsync();
         await erc20Wrapper.setBalancesAndAllowancesAsync();
 
-        erc721Proxy = await erc721Wrapper.deployERC721ProxyAsync();
+        erc721Proxy = await erc721Wrapper.deployProxyAsync();
 
         const assetProxyDispatcherInstance = await deployer.deployAsync(ContractName.AssetProxyDispatcher);
         assetProxyDispatcher = new AssetProxyDispatcherContract(
@@ -230,7 +230,7 @@ describe('AssetProxyDispatcher', () => {
                 { from: owner },
             );
             // Construct metadata for ERC20 proxy
-            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrx.address);
+            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrxToken.address);
             // Perform a transfer from makerAddress to takerAddress
             const erc20Balances = await erc20Wrapper.getBalancesAsync();
             const amount = new BigNumber(10);
@@ -243,17 +243,17 @@ describe('AssetProxyDispatcher', () => {
             );
             // Verify transfer was successful
             const newBalances = await erc20Wrapper.getBalancesAsync();
-            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrx.address].minus(amount),
+            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[makerAddress][zrxToken.address].minus(amount),
             );
-            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrx.address].add(amount),
+            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[takerAddress][zrxToken.address].add(amount),
             );
         });
 
         it('should throw if dispatching to unregistered proxy', async () => {
             // Construct metadata for ERC20 proxy
-            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrx.address);
+            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrxToken.address);
             // Perform a transfer from makerAddress to takerAddress
             const erc20Balances = await erc20Wrapper.getBalancesAsync();
             const amount = new BigNumber(10);
@@ -278,7 +278,7 @@ describe('AssetProxyDispatcher', () => {
                 { from: owner },
             );
             // Construct metadata for ERC20 proxy
-            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrx.address);
+            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrxToken.address);
             // Perform a transfer from makerAddress to takerAddress
             const erc20Balances = await erc20Wrapper.getBalancesAsync();
             const amount = new BigNumber(10);
diff --git a/packages/contracts/test/asset_proxy_dispatcher/proxies.ts b/packages/contracts/test/asset_proxy_dispatcher/proxies.ts
index 830f40e13..14d96f023 100644
--- a/packages/contracts/test/asset_proxy_dispatcher/proxies.ts
+++ b/packages/contracts/test/asset_proxy_dispatcher/proxies.ts
@@ -29,7 +29,7 @@ describe('Asset Transfer Proxies', () => {
     let makerAddress: string;
     let takerAddress: string;
 
-    let zrx: DummyERC20TokenContract;
+    let zrxToken: DummyERC20TokenContract;
     let erc721Token: DummyERC721TokenContract;
     let erc20Proxy: ERC20ProxyContract;
     let erc721Proxy: ERC721ProxyContract;
@@ -51,15 +51,15 @@ describe('Asset Transfer Proxies', () => {
         erc20Wrapper = new ERC20Wrapper(deployer, provider, usedAddresses, owner);
         erc721Wrapper = new ERC721Wrapper(deployer, provider, usedAddresses, owner);
 
-        [zrx] = await erc20Wrapper.deployDummyERC20TokensAsync();
-        erc20Proxy = await erc20Wrapper.deployERC20ProxyAsync();
+        [zrxToken] = await erc20Wrapper.deployDummyTokensAsync();
+        erc20Proxy = await erc20Wrapper.deployProxyAsync();
         await erc20Wrapper.setBalancesAndAllowancesAsync();
         await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(assetProxyDispatcherAddress, {
             from: owner,
         });
 
-        [erc721Token] = await erc721Wrapper.deployDummyERC721TokensAsync();
-        erc721Proxy = await erc721Wrapper.deployERC721ProxyAsync();
+        [erc721Token] = await erc721Wrapper.deployDummyTokensAsync();
+        erc721Proxy = await erc721Wrapper.deployProxyAsync();
         await erc721Wrapper.setBalancesAndAllowancesAsync();
         const erc721Balances = await erc721Wrapper.getBalancesAsync();
         erc721MakerTokenId = erc721Balances[makerAddress][erc721Token.address][0];
@@ -76,7 +76,7 @@ describe('Asset Transfer Proxies', () => {
     describe('Transfer Proxy - ERC20', () => {
         it('should successfully transfer tokens', async () => {
             // Construct metadata for ERC20 proxy
-            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrx.address);
+            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrxToken.address);
             // Perform a transfer from makerAddress to takerAddress
             const erc20Balances = await erc20Wrapper.getBalancesAsync();
             const amount = new BigNumber(10);
@@ -89,17 +89,17 @@ describe('Asset Transfer Proxies', () => {
             );
             // Verify transfer was successful
             const newBalances = await erc20Wrapper.getBalancesAsync();
-            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrx.address].minus(amount),
+            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[makerAddress][zrxToken.address].minus(amount),
             );
-            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrx.address].add(amount),
+            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[takerAddress][zrxToken.address].add(amount),
             );
         });
 
         it('should do nothing if transferring 0 amount of a token', async () => {
             // Construct metadata for ERC20 proxy
-            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrx.address);
+            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrxToken.address);
             // Perform a transfer from makerAddress to takerAddress
             const erc20Balances = await erc20Wrapper.getBalancesAsync();
             const amount = new BigNumber(0);
@@ -112,21 +112,21 @@ describe('Asset Transfer Proxies', () => {
             );
             // Verify transfer was successful
             const newBalances = await erc20Wrapper.getBalancesAsync();
-            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrx.address],
+            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[makerAddress][zrxToken.address],
             );
-            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrx.address],
+            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[takerAddress][zrxToken.address],
             );
         });
 
         it('should throw if allowances are too low', async () => {
             // Construct metadata for ERC20 proxy
-            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrx.address);
+            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrxToken.address);
             // Create allowance less than transfer amount. Set allowance on proxy.
             const allowance = new BigNumber(0);
             const transferAmount = new BigNumber(10);
-            await zrx.approve.sendTransactionAsync(erc20Proxy.address, allowance, {
+            await zrxToken.approve.sendTransactionAsync(erc20Proxy.address, allowance, {
                 from: makerAddress,
             });
             // Perform a transfer; expect this to fail.
@@ -143,7 +143,7 @@ describe('Asset Transfer Proxies', () => {
 
         it('should throw if requesting address is not authorized', async () => {
             // Construct metadata for ERC20 proxy
-            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrx.address);
+            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrxToken.address);
             // Perform a transfer from makerAddress to takerAddress
             const amount = new BigNumber(10);
             return expect(
diff --git a/packages/contracts/test/exchange/core.ts b/packages/contracts/test/exchange/core.ts
index 9065c5e3f..666486cc3 100644
--- a/packages/contracts/test/exchange/core.ts
+++ b/packages/contracts/test/exchange/core.ts
@@ -28,7 +28,6 @@ import {
     AssetProxyId,
     ContractName,
     ERC20BalancesByOwner,
-    ERC721BalancesByOwner,
     ExchangeContractErrs,
     SignedOrder,
 } from '../../src/utils/types';
@@ -48,7 +47,7 @@ describe('Exchange core', () => {
 
     let erc20TokenA: DummyERC20TokenContract;
     let erc20TokenB: DummyERC20TokenContract;
-    let zrx: DummyERC20TokenContract;
+    let zrxToken: DummyERC20TokenContract;
     let erc721Token: DummyERC721TokenContract;
     let exchange: ExchangeContract;
     let assetProxyDispatcher: AssetProxyDispatcherContract;
@@ -77,12 +76,12 @@ describe('Exchange core', () => {
         erc20Wrapper = new ERC20Wrapper(deployer, provider, usedAddresses, owner);
         erc721Wrapper = new ERC721Wrapper(deployer, provider, usedAddresses, owner);
 
-        [erc20TokenA, erc20TokenB, zrx] = await erc20Wrapper.deployDummyERC20TokensAsync();
-        erc20Proxy = await erc20Wrapper.deployERC20ProxyAsync();
+        [erc20TokenA, erc20TokenB, zrxToken] = await erc20Wrapper.deployDummyTokensAsync();
+        erc20Proxy = await erc20Wrapper.deployProxyAsync();
         await erc20Wrapper.setBalancesAndAllowancesAsync();
 
-        [erc721Token] = await erc721Wrapper.deployDummyERC721TokensAsync();
-        erc721Proxy = await erc721Wrapper.deployERC721ProxyAsync();
+        [erc721Token] = await erc721Wrapper.deployDummyTokensAsync();
+        erc721Proxy = await erc721Wrapper.deployProxyAsync();
         await erc721Wrapper.setBalancesAndAllowancesAsync();
         const erc721Balances = await erc721Wrapper.getBalancesAsync();
         erc721MakerAssetIds = erc721Balances[makerAddress][erc721Token.address];
@@ -117,7 +116,7 @@ describe('Exchange core', () => {
 
         const exchangeInstance = await deployer.deployAsync(ContractName.Exchange, [
             assetProxyDispatcher.address,
-            assetProxyUtils.encodeERC20ProxyData(zrx.address),
+            assetProxyUtils.encodeERC20ProxyData(zrxToken.address),
         ]);
         exchange = new ExchangeContract(exchangeInstance.abi, exchangeInstance.address, provider);
         await assetProxyDispatcher.addAuthorizedAddress.sendTransactionAsync(exchange.address, { from: owner });
@@ -227,8 +226,8 @@ describe('Exchange core', () => {
             expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[makerAddress][defaultTakerAssetAddress].add(takerAssetFillAmount),
             );
-            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrx.address].minus(makerFeePaid),
+            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[makerAddress][zrxToken.address].minus(makerFeePaid),
             );
             expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultTakerAssetAddress].minus(takerAssetFillAmount),
@@ -236,11 +235,11 @@ describe('Exchange core', () => {
             expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFilledAmount),
             );
-            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrx.address].minus(takerFeePaid),
+            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[takerAddress][zrxToken.address].minus(takerFeePaid),
             );
-            expect(newBalances[feeRecipientAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[feeRecipientAddress][zrx.address].add(makerFeePaid.add(takerFeePaid)),
+            expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFeePaid.add(takerFeePaid)),
             );
         });
 
@@ -280,8 +279,8 @@ describe('Exchange core', () => {
             expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[makerAddress][defaultTakerAssetAddress].add(takerAssetFillAmount),
             );
-            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrx.address].minus(makerFeePaid),
+            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[makerAddress][zrxToken.address].minus(makerFeePaid),
             );
             expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultTakerAssetAddress].minus(takerAssetFillAmount),
@@ -289,11 +288,11 @@ describe('Exchange core', () => {
             expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFilledAmount),
             );
-            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrx.address].minus(takerFeePaid),
+            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[takerAddress][zrxToken.address].minus(takerFeePaid),
             );
-            expect(newBalances[feeRecipientAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[feeRecipientAddress][zrx.address].add(makerFeePaid.add(takerFeePaid)),
+            expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFeePaid.add(takerFeePaid)),
             );
         });
 
@@ -333,8 +332,8 @@ describe('Exchange core', () => {
             expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[makerAddress][defaultTakerAssetAddress].add(takerAssetFillAmount),
             );
-            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrx.address].minus(makerFeePaid),
+            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[makerAddress][zrxToken.address].minus(makerFeePaid),
             );
             expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultTakerAssetAddress].minus(takerAssetFillAmount),
@@ -342,11 +341,11 @@ describe('Exchange core', () => {
             expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFilledAmount),
             );
-            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrx.address].minus(takerFeePaid),
+            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[takerAddress][zrxToken.address].minus(takerFeePaid),
             );
-            expect(newBalances[feeRecipientAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[feeRecipientAddress][zrx.address].add(makerFeePaid.add(takerFeePaid)),
+            expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFeePaid.add(takerFeePaid)),
             );
         });
 
@@ -388,8 +387,8 @@ describe('Exchange core', () => {
             expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[makerAddress][defaultTakerAssetAddress].add(takerAssetFillAmount),
             );
-            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrx.address].minus(makerFeePaid),
+            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[makerAddress][zrxToken.address].minus(makerFeePaid),
             );
             expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultTakerAssetAddress].minus(takerAssetFillAmount),
@@ -397,11 +396,11 @@ describe('Exchange core', () => {
             expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFilledAmount),
             );
-            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrx.address].minus(takerFeePaid),
+            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[takerAddress][zrxToken.address].minus(takerFeePaid),
             );
-            expect(newBalances[feeRecipientAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[feeRecipientAddress][zrx.address].add(makerFeePaid.add(takerFeePaid)),
+            expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFeePaid.add(takerFeePaid)),
             );
         });
 
@@ -424,8 +423,8 @@ describe('Exchange core', () => {
             expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[makerAddress][defaultTakerAssetAddress].add(signedOrder.takerAssetAmount),
             );
-            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrx.address].minus(signedOrder.makerFee),
+            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[makerAddress][zrxToken.address].minus(signedOrder.makerFee),
             );
             expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultTakerAssetAddress].minus(signedOrder.takerAssetAmount),
@@ -433,11 +432,13 @@ describe('Exchange core', () => {
             expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultMakerAssetAddress].add(signedOrder.makerAssetAmount),
             );
-            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrx.address].minus(signedOrder.takerFee),
+            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[takerAddress][zrxToken.address].minus(signedOrder.takerFee),
             );
-            expect(newBalances[feeRecipientAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[feeRecipientAddress][zrx.address].add(signedOrder.makerFee.add(signedOrder.takerFee)),
+            expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[feeRecipientAddress][zrxToken.address].add(
+                    signedOrder.makerFee.add(signedOrder.takerFee),
+                ),
             );
         });
 
@@ -768,8 +769,8 @@ describe('Exchange core', () => {
             expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[makerAddress][defaultTakerAssetAddress].add(fillTakerAssetAmount),
             );
-            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrx.address].minus(makerFee),
+            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[makerAddress][zrxToken.address].minus(makerFee),
             );
             expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultTakerAssetAddress].minus(fillTakerAssetAmount),
@@ -777,11 +778,11 @@ describe('Exchange core', () => {
             expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultMakerAssetAddress].add(fillMakerAssetAmount),
             );
-            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrx.address].minus(takerFee),
+            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[takerAddress][zrxToken.address].minus(takerFee),
             );
-            expect(newBalances[feeRecipientAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[feeRecipientAddress][zrx.address].add(makerFee.add(takerFee)),
+            expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFee.add(takerFee)),
             );
         });
     });
@@ -949,14 +950,16 @@ describe('Exchange core', () => {
             expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultTakerAssetAddress].minus(takerAssetFillAmount),
             );
-            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrx.address].minus(signedOrder.makerFee),
+            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[makerAddress][zrxToken.address].minus(signedOrder.makerFee),
             );
-            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrx.address].minus(signedOrder.takerFee),
+            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[takerAddress][zrxToken.address].minus(signedOrder.takerFee),
             );
-            expect(newBalances[feeRecipientAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[feeRecipientAddress][zrx.address].add(signedOrder.makerFee.add(signedOrder.takerFee)),
+            expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[feeRecipientAddress][zrxToken.address].add(
+                    signedOrder.makerFee.add(signedOrder.takerFee),
+                ),
             );
         });
 
@@ -987,14 +990,16 @@ describe('Exchange core', () => {
             expect(newBalances[makerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[makerAddress][defaultMakerAssetAddress].minus(signedOrder.makerAssetAmount),
             );
-            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrx.address].minus(signedOrder.makerFee),
+            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[makerAddress][zrxToken.address].minus(signedOrder.makerFee),
             );
-            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrx.address].minus(signedOrder.takerFee),
+            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[takerAddress][zrxToken.address].minus(signedOrder.takerFee),
             );
-            expect(newBalances[feeRecipientAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[feeRecipientAddress][zrx.address].add(signedOrder.makerFee.add(signedOrder.takerFee)),
+            expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[feeRecipientAddress][zrxToken.address].add(
+                    signedOrder.makerFee.add(signedOrder.takerFee),
+                ),
             );
         });
     });
diff --git a/packages/contracts/test/exchange/wrapper.ts b/packages/contracts/test/exchange/wrapper.ts
index 60f47373e..d2d82f977 100644
--- a/packages/contracts/test/exchange/wrapper.ts
+++ b/packages/contracts/test/exchange/wrapper.ts
@@ -19,13 +19,7 @@ import { ERC20Wrapper } from '../../src/utils/erc20_wrapper';
 import { ERC721Wrapper } from '../../src/utils/erc721_wrapper';
 import { ExchangeWrapper } from '../../src/utils/exchange_wrapper';
 import { OrderFactory } from '../../src/utils/order_factory';
-import {
-    AssetProxyId,
-    ContractName,
-    ERC20BalancesByOwner,
-    ERC721BalancesByOwner,
-    SignedOrder,
-} from '../../src/utils/types';
+import { AssetProxyId, ContractName, ERC20BalancesByOwner, SignedOrder } from '../../src/utils/types';
 import { chaiSetup } from '../utils/chai_setup';
 import { deployer } from '../utils/deployer';
 import { provider, web3Wrapper } from '../utils/web3_wrapper';
@@ -42,7 +36,7 @@ describe('Exchange wrappers', () => {
 
     let erc20TokenA: DummyERC20TokenContract;
     let erc20TokenB: DummyERC20TokenContract;
-    let zrx: DummyERC20TokenContract;
+    let zrxToken: DummyERC20TokenContract;
     let erc721Token: DummyERC721TokenContract;
     let exchange: ExchangeContract;
     let assetProxyDispatcher: AssetProxyDispatcherContract;
@@ -70,12 +64,12 @@ describe('Exchange wrappers', () => {
         erc20Wrapper = new ERC20Wrapper(deployer, provider, usedAddresses, owner);
         erc721Wrapper = new ERC721Wrapper(deployer, provider, usedAddresses, owner);
 
-        [erc20TokenA, erc20TokenB, zrx] = await erc20Wrapper.deployDummyERC20TokensAsync();
-        erc20Proxy = await erc20Wrapper.deployERC20ProxyAsync();
+        [erc20TokenA, erc20TokenB, zrxToken] = await erc20Wrapper.deployDummyTokensAsync();
+        erc20Proxy = await erc20Wrapper.deployProxyAsync();
         await erc20Wrapper.setBalancesAndAllowancesAsync();
 
-        [erc721Token] = await erc721Wrapper.deployDummyERC721TokensAsync();
-        erc721Proxy = await erc721Wrapper.deployERC721ProxyAsync();
+        [erc721Token] = await erc721Wrapper.deployDummyTokensAsync();
+        erc721Proxy = await erc721Wrapper.deployProxyAsync();
         await erc721Wrapper.setBalancesAndAllowancesAsync();
         const erc721Balances = await erc721Wrapper.getBalancesAsync();
         erc721MakerAssetId = erc721Balances[makerAddress][erc721Token.address][0];
@@ -110,7 +104,7 @@ describe('Exchange wrappers', () => {
 
         const exchangeInstance = await deployer.deployAsync(ContractName.Exchange, [
             assetProxyDispatcher.address,
-            assetProxyUtils.encodeERC20ProxyData(zrx.address),
+            assetProxyUtils.encodeERC20ProxyData(zrxToken.address),
         ]);
         exchange = new ExchangeContract(exchangeInstance.abi, exchangeInstance.address, provider);
         await assetProxyDispatcher.addAuthorizedAddress.sendTransactionAsync(exchange.address, { from: owner });
@@ -169,8 +163,8 @@ describe('Exchange wrappers', () => {
             expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[makerAddress][defaultTakerAssetAddress].add(takerAssetFillAmount),
             );
-            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrx.address].minus(makerFee),
+            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[makerAddress][zrxToken.address].minus(makerFee),
             );
             expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultTakerAssetAddress].minus(takerAssetFillAmount),
@@ -178,11 +172,11 @@ describe('Exchange wrappers', () => {
             expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFilledAmount),
             );
-            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrx.address].minus(takerFee),
+            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[takerAddress][zrxToken.address].minus(takerFee),
             );
-            expect(newBalances[feeRecipientAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[feeRecipientAddress][zrx.address].add(makerFee.add(takerFee)),
+            expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFee.add(takerFee)),
             );
         });
 
@@ -237,8 +231,8 @@ describe('Exchange wrappers', () => {
             expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[makerAddress][defaultTakerAssetAddress].add(takerAssetFillAmount),
             );
-            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrx.address].minus(makerFee),
+            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[makerAddress][zrxToken.address].minus(makerFee),
             );
             expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultTakerAssetAddress].minus(takerAssetFillAmount),
@@ -246,11 +240,11 @@ describe('Exchange wrappers', () => {
             expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
                 erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFilledAmount),
             );
-            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrx.address].minus(takerFee),
+            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[takerAddress][zrxToken.address].minus(takerFee),
             );
-            expect(newBalances[feeRecipientAddress][zrx.address]).to.be.bignumber.equal(
-                erc20Balances[feeRecipientAddress][zrx.address].add(makerFee.add(takerFee)),
+            expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
+                erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFee.add(takerFee)),
             );
         });
 
@@ -303,11 +297,11 @@ describe('Exchange wrappers', () => {
         });
 
         it('should not change erc20Balances if makerAssetAddress is ZRX, makerAssetAmount + makerFee > maker balance', async () => {
-            const makerZRXBalance = new BigNumber(erc20Balances[makerAddress][zrx.address]);
+            const makerZRXBalance = new BigNumber(erc20Balances[makerAddress][zrxToken.address]);
             const signedOrder = orderFactory.newSignedOrder({
                 makerAssetAmount: makerZRXBalance,
                 makerFee: new BigNumber(1),
-                makerAssetData: assetProxyUtils.encodeERC20ProxyData(zrx.address),
+                makerAssetData: assetProxyUtils.encodeERC20ProxyData(zrxToken.address),
             });
             await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress);
             const newBalances = await erc20Wrapper.getBalancesAsync();
@@ -315,11 +309,11 @@ describe('Exchange wrappers', () => {
         });
 
         it('should not change erc20Balances if makerAssetAddress is ZRX, makerAssetAmount + makerFee > maker allowance', async () => {
-            const makerZRXAllowance = await zrx.allowance.callAsync(makerAddress, erc20Proxy.address);
+            const makerZRXAllowance = await zrxToken.allowance.callAsync(makerAddress, erc20Proxy.address);
             const signedOrder = orderFactory.newSignedOrder({
                 makerAssetAmount: new BigNumber(makerZRXAllowance),
                 makerFee: new BigNumber(1),
-                makerAssetData: assetProxyUtils.encodeERC20ProxyData(zrx.address),
+                makerAssetData: assetProxyUtils.encodeERC20ProxyData(zrxToken.address),
             });
             await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress);
             const newBalances = await erc20Wrapper.getBalancesAsync();
@@ -327,11 +321,11 @@ describe('Exchange wrappers', () => {
         });
 
         it('should not change erc20Balances if takerAssetAddress is ZRX, takerAssetAmount + takerFee > taker balance', async () => {
-            const takerZRXBalance = new BigNumber(erc20Balances[takerAddress][zrx.address]);
+            const takerZRXBalance = new BigNumber(erc20Balances[takerAddress][zrxToken.address]);
             const signedOrder = orderFactory.newSignedOrder({
                 takerAssetAmount: takerZRXBalance,
                 takerFee: new BigNumber(1),
-                takerAssetData: assetProxyUtils.encodeERC20ProxyData(zrx.address),
+                takerAssetData: assetProxyUtils.encodeERC20ProxyData(zrxToken.address),
             });
             await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress);
             const newBalances = await erc20Wrapper.getBalancesAsync();
@@ -339,11 +333,11 @@ describe('Exchange wrappers', () => {
         });
 
         it('should not change erc20Balances if takerAssetAddress is ZRX, takerAssetAmount + takerFee > taker allowance', async () => {
-            const takerZRXAllowance = await zrx.allowance.callAsync(takerAddress, erc20Proxy.address);
+            const takerZRXAllowance = await zrxToken.allowance.callAsync(takerAddress, erc20Proxy.address);
             const signedOrder = orderFactory.newSignedOrder({
                 takerAssetAmount: new BigNumber(takerZRXAllowance),
                 takerFee: new BigNumber(1),
-                takerAssetData: assetProxyUtils.encodeERC20ProxyData(zrx.address),
+                takerAssetData: assetProxyUtils.encodeERC20ProxyData(zrxToken.address),
             });
             await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress);
             const newBalances = await erc20Wrapper.getBalancesAsync();
@@ -409,16 +403,20 @@ describe('Exchange wrappers', () => {
                     erc20Balances[makerAddress][takerAssetAddress] = erc20Balances[makerAddress][takerAssetAddress].add(
                         takerAssetFillAmount,
                     );
-                    erc20Balances[makerAddress][zrx.address] = erc20Balances[makerAddress][zrx.address].minus(makerFee);
+                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
+                        makerFee,
+                    );
                     erc20Balances[takerAddress][makerAssetAddress] = erc20Balances[takerAddress][makerAssetAddress].add(
                         makerAssetFilledAmount,
                     );
                     erc20Balances[takerAddress][takerAssetAddress] = erc20Balances[takerAddress][
                         takerAssetAddress
                     ].minus(takerAssetFillAmount);
-                    erc20Balances[takerAddress][zrx.address] = erc20Balances[takerAddress][zrx.address].minus(takerFee);
-                    erc20Balances[feeRecipientAddress][zrx.address] = erc20Balances[feeRecipientAddress][
-                        zrx.address
+                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
+                        takerFee,
+                    );
+                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
+                        zrxToken.address
                     ].add(makerFee.add(takerFee));
                 });
 
@@ -454,16 +452,20 @@ describe('Exchange wrappers', () => {
                     erc20Balances[makerAddress][takerAssetAddress] = erc20Balances[makerAddress][takerAssetAddress].add(
                         takerAssetFillAmount,
                     );
-                    erc20Balances[makerAddress][zrx.address] = erc20Balances[makerAddress][zrx.address].minus(makerFee);
+                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
+                        makerFee,
+                    );
                     erc20Balances[takerAddress][makerAssetAddress] = erc20Balances[takerAddress][makerAssetAddress].add(
                         makerAssetFilledAmount,
                     );
                     erc20Balances[takerAddress][takerAssetAddress] = erc20Balances[takerAddress][
                         takerAssetAddress
                     ].minus(takerAssetFillAmount);
-                    erc20Balances[takerAddress][zrx.address] = erc20Balances[takerAddress][zrx.address].minus(takerFee);
-                    erc20Balances[feeRecipientAddress][zrx.address] = erc20Balances[feeRecipientAddress][
-                        zrx.address
+                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
+                        takerFee,
+                    );
+                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
+                        zrxToken.address
                     ].add(makerFee.add(takerFee));
                 });
 
@@ -515,16 +517,20 @@ describe('Exchange wrappers', () => {
                     erc20Balances[makerAddress][takerAssetAddress] = erc20Balances[makerAddress][takerAssetAddress].add(
                         takerAssetFillAmount,
                     );
-                    erc20Balances[makerAddress][zrx.address] = erc20Balances[makerAddress][zrx.address].minus(makerFee);
+                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
+                        makerFee,
+                    );
                     erc20Balances[takerAddress][makerAssetAddress] = erc20Balances[takerAddress][makerAssetAddress].add(
                         makerAssetFilledAmount,
                     );
                     erc20Balances[takerAddress][takerAssetAddress] = erc20Balances[takerAddress][
                         takerAssetAddress
                     ].minus(takerAssetFillAmount);
-                    erc20Balances[takerAddress][zrx.address] = erc20Balances[takerAddress][zrx.address].minus(takerFee);
-                    erc20Balances[feeRecipientAddress][zrx.address] = erc20Balances[feeRecipientAddress][
-                        zrx.address
+                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
+                        takerFee,
+                    );
+                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
+                        zrxToken.address
                     ].add(makerFee.add(takerFee));
                 });
 
@@ -566,16 +572,20 @@ describe('Exchange wrappers', () => {
                     erc20Balances[makerAddress][takerAssetAddress] = erc20Balances[makerAddress][takerAssetAddress].add(
                         takerAssetFillAmount,
                     );
-                    erc20Balances[makerAddress][zrx.address] = erc20Balances[makerAddress][zrx.address].minus(makerFee);
+                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
+                        makerFee,
+                    );
                     erc20Balances[takerAddress][makerAssetAddress] = erc20Balances[takerAddress][makerAssetAddress].add(
                         makerAssetFilledAmount,
                     );
                     erc20Balances[takerAddress][takerAssetAddress] = erc20Balances[takerAddress][
                         takerAssetAddress
                     ].minus(takerAssetFillAmount);
-                    erc20Balances[takerAddress][zrx.address] = erc20Balances[takerAddress][zrx.address].minus(takerFee);
-                    erc20Balances[feeRecipientAddress][zrx.address] = erc20Balances[feeRecipientAddress][
-                        zrx.address
+                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
+                        takerFee,
+                    );
+                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
+                        zrxToken.address
                     ].add(makerFee.add(takerFee));
                 });
 
@@ -611,8 +621,8 @@ describe('Exchange wrappers', () => {
                 expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                     erc20Balances[makerAddress][defaultTakerAssetAddress].add(takerAssetFillAmount),
                 );
-                expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][zrx.address].minus(makerFee),
+                expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                    erc20Balances[makerAddress][zrxToken.address].minus(makerFee),
                 );
                 expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                     erc20Balances[takerAddress][defaultTakerAssetAddress].minus(takerAssetFillAmount),
@@ -620,11 +630,11 @@ describe('Exchange wrappers', () => {
                 expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
                     erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFilledAmount),
                 );
-                expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][zrx.address].minus(takerFee),
+                expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                    erc20Balances[takerAddress][zrxToken.address].minus(takerFee),
                 );
-                expect(newBalances[feeRecipientAddress][zrx.address]).to.be.bignumber.equal(
-                    erc20Balances[feeRecipientAddress][zrx.address].add(makerFee.add(takerFee)),
+                expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
+                    erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFee.add(takerFee)),
                 );
             });
 
@@ -637,7 +647,7 @@ describe('Exchange wrappers', () => {
                     erc20Balances[makerAddress][defaultTakerAssetAddress] = erc20Balances[makerAddress][
                         defaultTakerAssetAddress
                     ].add(signedOrder.takerAssetAmount);
-                    erc20Balances[makerAddress][zrx.address] = erc20Balances[makerAddress][zrx.address].minus(
+                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
                         signedOrder.makerFee,
                     );
                     erc20Balances[takerAddress][defaultMakerAssetAddress] = erc20Balances[takerAddress][
@@ -646,11 +656,11 @@ describe('Exchange wrappers', () => {
                     erc20Balances[takerAddress][defaultTakerAssetAddress] = erc20Balances[takerAddress][
                         defaultTakerAssetAddress
                     ].minus(signedOrder.takerAssetAmount);
-                    erc20Balances[takerAddress][zrx.address] = erc20Balances[takerAddress][zrx.address].minus(
+                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
                         signedOrder.takerFee,
                     );
-                    erc20Balances[feeRecipientAddress][zrx.address] = erc20Balances[feeRecipientAddress][
-                        zrx.address
+                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
+                        zrxToken.address
                     ].add(signedOrder.makerFee.add(signedOrder.takerFee));
                 });
                 await exchangeWrapper.marketSellOrdersAsync(signedOrders, takerAddress, {
@@ -664,7 +674,9 @@ describe('Exchange wrappers', () => {
             it('should throw when an signedOrder does not use the same takerAssetAddress', async () => {
                 signedOrders = [
                     orderFactory.newSignedOrder(),
-                    orderFactory.newSignedOrder({ takerAssetData: assetProxyUtils.encodeERC20ProxyData(zrx.address) }),
+                    orderFactory.newSignedOrder({
+                        takerAssetData: assetProxyUtils.encodeERC20ProxyData(zrxToken.address),
+                    }),
                     orderFactory.newSignedOrder(),
                 ];
 
@@ -698,8 +710,8 @@ describe('Exchange wrappers', () => {
                 expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                     erc20Balances[makerAddress][defaultTakerAssetAddress].add(takerAssetFillAmount),
                 );
-                expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][zrx.address].minus(makerFee),
+                expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                    erc20Balances[makerAddress][zrxToken.address].minus(makerFee),
                 );
                 expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                     erc20Balances[takerAddress][defaultTakerAssetAddress].minus(takerAssetFillAmount),
@@ -707,11 +719,11 @@ describe('Exchange wrappers', () => {
                 expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
                     erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFilledAmount),
                 );
-                expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][zrx.address].minus(takerFee),
+                expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                    erc20Balances[takerAddress][zrxToken.address].minus(takerFee),
                 );
-                expect(newBalances[feeRecipientAddress][zrx.address]).to.be.bignumber.equal(
-                    erc20Balances[feeRecipientAddress][zrx.address].add(makerFee.add(takerFee)),
+                expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
+                    erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFee.add(takerFee)),
                 );
             });
 
@@ -724,7 +736,7 @@ describe('Exchange wrappers', () => {
                     erc20Balances[makerAddress][defaultTakerAssetAddress] = erc20Balances[makerAddress][
                         defaultTakerAssetAddress
                     ].add(signedOrder.takerAssetAmount);
-                    erc20Balances[makerAddress][zrx.address] = erc20Balances[makerAddress][zrx.address].minus(
+                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
                         signedOrder.makerFee,
                     );
                     erc20Balances[takerAddress][defaultMakerAssetAddress] = erc20Balances[takerAddress][
@@ -733,11 +745,11 @@ describe('Exchange wrappers', () => {
                     erc20Balances[takerAddress][defaultTakerAssetAddress] = erc20Balances[takerAddress][
                         defaultTakerAssetAddress
                     ].minus(signedOrder.takerAssetAmount);
-                    erc20Balances[takerAddress][zrx.address] = erc20Balances[takerAddress][zrx.address].minus(
+                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
                         signedOrder.takerFee,
                     );
-                    erc20Balances[feeRecipientAddress][zrx.address] = erc20Balances[feeRecipientAddress][
-                        zrx.address
+                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
+                        zrxToken.address
                     ].add(signedOrder.makerFee.add(signedOrder.takerFee));
                 });
                 await exchangeWrapper.marketSellOrdersNoThrowAsync(signedOrders, takerAddress, {
@@ -751,7 +763,9 @@ describe('Exchange wrappers', () => {
             it('should throw when a signedOrder does not use the same takerAssetAddress', async () => {
                 signedOrders = [
                     orderFactory.newSignedOrder(),
-                    orderFactory.newSignedOrder({ takerAssetData: assetProxyUtils.encodeERC20ProxyData(zrx.address) }),
+                    orderFactory.newSignedOrder({
+                        takerAssetData: assetProxyUtils.encodeERC20ProxyData(zrxToken.address),
+                    }),
                     orderFactory.newSignedOrder(),
                 ];
 
@@ -785,8 +799,8 @@ describe('Exchange wrappers', () => {
                 expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                     erc20Balances[makerAddress][defaultTakerAssetAddress].add(makerAmountBought),
                 );
-                expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][zrx.address].minus(makerFee),
+                expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                    erc20Balances[makerAddress][zrxToken.address].minus(makerFee),
                 );
                 expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                     erc20Balances[takerAddress][defaultTakerAssetAddress].minus(makerAmountBought),
@@ -794,11 +808,11 @@ describe('Exchange wrappers', () => {
                 expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
                     erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFillAmount),
                 );
-                expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][zrx.address].minus(takerFee),
+                expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                    erc20Balances[takerAddress][zrxToken.address].minus(takerFee),
                 );
-                expect(newBalances[feeRecipientAddress][zrx.address]).to.be.bignumber.equal(
-                    erc20Balances[feeRecipientAddress][zrx.address].add(makerFee.add(takerFee)),
+                expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
+                    erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFee.add(takerFee)),
                 );
             });
 
@@ -811,7 +825,7 @@ describe('Exchange wrappers', () => {
                     erc20Balances[makerAddress][defaultTakerAssetAddress] = erc20Balances[makerAddress][
                         defaultTakerAssetAddress
                     ].add(signedOrder.takerAssetAmount);
-                    erc20Balances[makerAddress][zrx.address] = erc20Balances[makerAddress][zrx.address].minus(
+                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
                         signedOrder.makerFee,
                     );
                     erc20Balances[takerAddress][defaultMakerAssetAddress] = erc20Balances[takerAddress][
@@ -820,11 +834,11 @@ describe('Exchange wrappers', () => {
                     erc20Balances[takerAddress][defaultTakerAssetAddress] = erc20Balances[takerAddress][
                         defaultTakerAssetAddress
                     ].minus(signedOrder.takerAssetAmount);
-                    erc20Balances[takerAddress][zrx.address] = erc20Balances[takerAddress][zrx.address].minus(
+                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
                         signedOrder.takerFee,
                     );
-                    erc20Balances[feeRecipientAddress][zrx.address] = erc20Balances[feeRecipientAddress][
-                        zrx.address
+                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
+                        zrxToken.address
                     ].add(signedOrder.makerFee.add(signedOrder.takerFee));
                 });
                 await exchangeWrapper.marketBuyOrdersAsync(signedOrders, takerAddress, {
@@ -838,7 +852,9 @@ describe('Exchange wrappers', () => {
             it('should throw when an signedOrder does not use the same makerAssetAddress', async () => {
                 signedOrders = [
                     orderFactory.newSignedOrder(),
-                    orderFactory.newSignedOrder({ makerAssetData: assetProxyUtils.encodeERC20ProxyData(zrx.address) }),
+                    orderFactory.newSignedOrder({
+                        makerAssetData: assetProxyUtils.encodeERC20ProxyData(zrxToken.address),
+                    }),
                     orderFactory.newSignedOrder(),
                 ];
 
@@ -872,8 +888,8 @@ describe('Exchange wrappers', () => {
                 expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                     erc20Balances[makerAddress][defaultTakerAssetAddress].add(makerAmountBought),
                 );
-                expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][zrx.address].minus(makerFee),
+                expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
+                    erc20Balances[makerAddress][zrxToken.address].minus(makerFee),
                 );
                 expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
                     erc20Balances[takerAddress][defaultTakerAssetAddress].minus(makerAmountBought),
@@ -881,11 +897,11 @@ describe('Exchange wrappers', () => {
                 expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
                     erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFillAmount),
                 );
-                expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][zrx.address].minus(takerFee),
+                expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
+                    erc20Balances[takerAddress][zrxToken.address].minus(takerFee),
                 );
-                expect(newBalances[feeRecipientAddress][zrx.address]).to.be.bignumber.equal(
-                    erc20Balances[feeRecipientAddress][zrx.address].add(makerFee.add(takerFee)),
+                expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
+                    erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFee.add(takerFee)),
                 );
             });
 
@@ -898,7 +914,7 @@ describe('Exchange wrappers', () => {
                     erc20Balances[makerAddress][defaultTakerAssetAddress] = erc20Balances[makerAddress][
                         defaultTakerAssetAddress
                     ].add(signedOrder.takerAssetAmount);
-                    erc20Balances[makerAddress][zrx.address] = erc20Balances[makerAddress][zrx.address].minus(
+                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
                         signedOrder.makerFee,
                     );
                     erc20Balances[takerAddress][defaultMakerAssetAddress] = erc20Balances[takerAddress][
@@ -907,11 +923,11 @@ describe('Exchange wrappers', () => {
                     erc20Balances[takerAddress][defaultTakerAssetAddress] = erc20Balances[takerAddress][
                         defaultTakerAssetAddress
                     ].minus(signedOrder.takerAssetAmount);
-                    erc20Balances[takerAddress][zrx.address] = erc20Balances[takerAddress][zrx.address].minus(
+                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
                         signedOrder.takerFee,
                     );
-                    erc20Balances[feeRecipientAddress][zrx.address] = erc20Balances[feeRecipientAddress][
-                        zrx.address
+                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
+                        zrxToken.address
                     ].add(signedOrder.makerFee.add(signedOrder.takerFee));
                 });
                 await exchangeWrapper.marketSellOrdersNoThrowAsync(signedOrders, takerAddress, {
@@ -925,7 +941,9 @@ describe('Exchange wrappers', () => {
             it('should throw when a signedOrder does not use the same makerAssetAddress', async () => {
                 signedOrders = [
                     orderFactory.newSignedOrder(),
-                    orderFactory.newSignedOrder({ makerAssetData: assetProxyUtils.encodeERC20ProxyData(zrx.address) }),
+                    orderFactory.newSignedOrder({
+                        makerAssetData: assetProxyUtils.encodeERC20ProxyData(zrxToken.address),
+                    }),
                     orderFactory.newSignedOrder(),
                 ];
 
diff --git a/packages/contracts/test/zrx_token.ts b/packages/contracts/test/zrx_token.ts
index 259b4310e..ddb7f0b35 100644
--- a/packages/contracts/test/zrx_token.ts
+++ b/packages/contracts/test/zrx_token.ts
@@ -24,7 +24,7 @@ describe('ZRXToken', () => {
 
     let MAX_UINT: BigNumber;
 
-    let zrx: ZRXTokenContract;
+    let zrxToken: ZRXTokenContract;
     let zrxAddress: string;
 
     before(async () => {
@@ -35,8 +35,8 @@ describe('ZRXToken', () => {
             networkId: constants.TESTRPC_NETWORK_ID,
         });
         const zrxInstance = await deployer.deployAsync(ContractName.ZRXToken);
-        zrx = new ZRXTokenContract(zrxInstance.abi, zrxInstance.address, provider);
-        zrxAddress = zrx.address;
+        zrxToken = new ZRXTokenContract(zrxInstance.abi, zrxInstance.address, provider);
+        zrxAddress = zrxToken.address;
         MAX_UINT = zeroEx.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS;
     });
     beforeEach(async () => {
@@ -47,25 +47,25 @@ describe('ZRXToken', () => {
     });
     describe('constants', () => {
         it('should have 18 decimals', async () => {
-            const decimals = new BigNumber(await zrx.decimals.callAsync());
+            const decimals = new BigNumber(await zrxToken.decimals.callAsync());
             const expectedDecimals = 18;
             expect(decimals).to.be.bignumber.equal(expectedDecimals);
         });
 
         it('should have a total supply of 1 billion tokens', async () => {
-            const totalSupply = new BigNumber(await zrx.totalSupply.callAsync());
+            const totalSupply = new BigNumber(await zrxToken.totalSupply.callAsync());
             const expectedTotalSupply = 1000000000;
             expect(ZeroEx.toUnitAmount(totalSupply, 18)).to.be.bignumber.equal(expectedTotalSupply);
         });
 
         it('should be named 0x Protocol Token', async () => {
-            const name = await zrx.name.callAsync();
+            const name = await zrxToken.name.callAsync();
             const expectedName = '0x Protocol Token';
             expect(name).to.be.equal(expectedName);
         });
 
         it('should have the symbol ZRX', async () => {
-            const symbol = await zrx.symbol.callAsync();
+            const symbol = await zrxToken.symbol.callAsync();
             const expectedSymbol = 'ZRX';
             expect(symbol).to.be.equal(expectedSymbol);
         });
@@ -74,7 +74,7 @@ describe('ZRXToken', () => {
     describe('constructor', () => {
         it('should initialize owner balance to totalSupply', async () => {
             const ownerBalance = await zeroEx.token.getBalanceAsync(zrxAddress, owner);
-            const totalSupply = new BigNumber(await zrx.totalSupply.callAsync());
+            const totalSupply = new BigNumber(await zrxToken.totalSupply.callAsync());
             expect(totalSupply).to.be.bignumber.equal(ownerBalance);
         });
     });
@@ -95,7 +95,7 @@ describe('ZRXToken', () => {
         });
 
         it('should return true on a 0 value transfer', async () => {
-            const didReturnTrue = await zrx.transfer.callAsync(spender, new BigNumber(0), {
+            const didReturnTrue = await zrxToken.transfer.callAsync(spender, new BigNumber(0), {
                 from: owner,
             });
             expect(didReturnTrue).to.be.true();
@@ -109,7 +109,7 @@ describe('ZRXToken', () => {
             await zeroEx.token.setAllowanceAsync(zrxAddress, owner, spender, amountToTransfer, {
                 gasLimit: constants.MAX_TOKEN_APPROVE_GAS,
             });
-            const didReturnTrue = await zrx.transferFrom.callAsync(owner, spender, amountToTransfer, { from: spender });
+            const didReturnTrue = await zrxToken.transferFrom.callAsync(owner, spender, amountToTransfer, { from: spender });
             expect(didReturnTrue).to.be.false();
         });
 
@@ -121,13 +121,13 @@ describe('ZRXToken', () => {
             const spenderAllowanceIsInsufficient = spenderAllowance.cmp(amountToTransfer) < 0;
             expect(spenderAllowanceIsInsufficient).to.be.true();
 
-            const didReturnTrue = await zrx.transferFrom.callAsync(owner, spender, amountToTransfer, { from: spender });
+            const didReturnTrue = await zrxToken.transferFrom.callAsync(owner, spender, amountToTransfer, { from: spender });
             expect(didReturnTrue).to.be.false();
         });
 
         it('should return true on a 0 value transfer', async () => {
             const amountToTransfer = new BigNumber(0);
-            const didReturnTrue = await zrx.transferFrom.callAsync(owner, spender, amountToTransfer, { from: spender });
+            const didReturnTrue = await zrxToken.transferFrom.callAsync(owner, spender, amountToTransfer, { from: spender });
             expect(didReturnTrue).to.be.true();
         });