Merge branch 'v2-prototype' into abi-gen-ignore-unchanged

339 files changed, 2790 insertions, 1131 deletions

diff --git a/packages/0x.js/CHANGELOG.json b/packages/0x.js/CHANGELOG.json
index 04439921e..b39079ff2 100644
--- a/packages/0x.js/CHANGELOG.json
+++ b/packages/0x.js/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1531149657,
+        "version": "0.38.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.38.4",
         "changes": [
diff --git a/packages/0x.js/CHANGELOG.md b/packages/0x.js/CHANGELOG.md
index 3c7c76662..00048f610 100644
--- a/packages/0x.js/CHANGELOG.md
+++ b/packages/0x.js/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.38.5 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.38.4 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/0x.js/package.json b/packages/0x.js/package.json
index 1b41a7cf2..226452dbe 100644
--- a/packages/0x.js/package.json
+++ b/packages/0x.js/package.json
@@ -1,6 +1,6 @@
 {
     "name": "0x.js",
-    "version": "0.38.4",
+    "version": "0.38.5",
     "engines": {
         "node": ">=6.12"
     },
@@ -69,12 +69,12 @@
     },
     "license": "Apache-2.0",
     "devDependencies": {
-        "@0xproject/abi-gen": "^0.3.2",
-        "@0xproject/dev-utils": "^0.4.4",
-        "@0xproject/migrations": "^0.0.8",
-        "@0xproject/monorepo-scripts": "^0.2.1",
+        "@0xproject/abi-gen": "^0.3.3",
+        "@0xproject/dev-utils": "^0.4.5",
+        "@0xproject/migrations": "^0.0.9",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
         "@0xproject/sol-compiler": "^0.5.2",
-        "@0xproject/tslint-config": "^0.4.20",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
         "@types/node": "^8.0.53",
@@ -100,17 +100,16 @@
         "webpack": "^3.1.0"
     },
     "dependencies": {
-        "@0xproject/assert": "^0.2.12",
-        "@0xproject/base-contract": "^0.3.4",
+        "@0xproject/assert": "^0.2.13",
+        "@0xproject/base-contract": "^0.3.5",
         "@0xproject/contract-wrappers": "^0.0.5",
-        "@0xproject/order-utils": "^0.0.7",
-        "@0xproject/order-watcher": "^0.0.6",
-        "@0xproject/sol-compiler": "^0.5.2",
-        "@0xproject/types": "^0.8.1",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
-        "@0xproject/web3-wrapper": "^0.7.1",
-        "ethereum-types": "^0.0.2",
+        "@0xproject/order-utils": "^0.0.8",
+        "@0xproject/order-watcher": "^0.0.7",
+        "@0xproject/sol-compiler": "^0.5.3",
+        "@0xproject/types": "^0.8.2",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
+        "@0xproject/web3-wrapper": "^0.7.2",
         "ethers": "3.0.22",
         "lodash": "^4.17.4"
     },
diff --git a/packages/abi-gen/CHANGELOG.json b/packages/abi-gen/CHANGELOG.json
index 78aa8a6b4..ef8f5dd39 100644
--- a/packages/abi-gen/CHANGELOG.json
+++ b/packages/abi-gen/CHANGELOG.json
@@ -22,6 +22,15 @@
         ]
     },
     {
+        "timestamp": 1531149657,
+        "version": "0.3.3",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.3.2",
         "changes": [
diff --git a/packages/abi-gen/CHANGELOG.md b/packages/abi-gen/CHANGELOG.md
index 5167af522..33bc3276a 100644
--- a/packages/abi-gen/CHANGELOG.md
+++ b/packages/abi-gen/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.3.3 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.3.2 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/abi-gen/package.json b/packages/abi-gen/package.json
index b85b20d19..4fb335545 100644
--- a/packages/abi-gen/package.json
+++ b/packages/abi-gen/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/abi-gen",
-    "version": "0.3.2",
+    "version": "0.3.3",
     "engines": {
         "node": ">=6.12"
     },
@@ -32,8 +32,9 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/abi-gen/README.md",
     "dependencies": {
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
+        "ethereum-types": "^0.0.2",
         "chalk": "^2.3.0",
         "ethereum-types": "^0.0.2",
         "glob": "^7.1.2",
@@ -46,9 +47,9 @@
         "yargs": "^10.0.3"
     },
     "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
-        "@types/glob": "^5.0.33",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
+        "@types/glob": "5.0.35",
         "@types/handlebars": "^4.0.36",
         "@types/mkdirp": "^0.5.1",
         "@types/node": "^8.0.53",
diff --git a/packages/assert/CHANGELOG.json b/packages/assert/CHANGELOG.json
index b44cac4a1..1ddc6d280 100644
--- a/packages/assert/CHANGELOG.json
+++ b/packages/assert/CHANGELOG.json
@@ -1,6 +1,6 @@
 [
     {
-        "version": "0.2.13",
+        "version": "0.2.14",
         "changes": [
             {
                 "note":
@@ -10,6 +10,15 @@
         ]
     },
     {
+        "timestamp": 1531149657,
+        "version": "0.2.13",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.2.12",
         "changes": [
diff --git a/packages/assert/CHANGELOG.md b/packages/assert/CHANGELOG.md
index 98a83e81b..f0d2f55b0 100644
--- a/packages/assert/CHANGELOG.md
+++ b/packages/assert/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.2.13 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.2.12 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/assert/package.json b/packages/assert/package.json
index c24f73c4b..3b9ecbb49 100644
--- a/packages/assert/package.json
+++ b/packages/assert/package.json
@@ -31,8 +31,8 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/assert/README.md",
     "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
         "@types/valid-url": "^1.0.2",
@@ -49,8 +49,8 @@
     },
     "dependencies": {
         "@0xproject/json-schemas": "^1.0.0",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
         "lodash": "^4.17.4",
         "valid-url": "^1.0.9"
     },
diff --git a/packages/base-contract/CHANGELOG.json b/packages/base-contract/CHANGELOG.json
index e5788b867..400489afa 100644
--- a/packages/base-contract/CHANGELOG.json
+++ b/packages/base-contract/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1531149657,
+        "version": "0.3.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "version": "0.3.4",
         "changes": [
             {
diff --git a/packages/base-contract/CHANGELOG.md b/packages/base-contract/CHANGELOG.md
index a37a08584..ad73a1863 100644
--- a/packages/base-contract/CHANGELOG.md
+++ b/packages/base-contract/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.3.5 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.3.4 - _June 19, 2018_
 
     * Update EthersJs to fix the `value.toLowerCase()` is not a function bug caused by `ethers.js` breaking patch version https://github.com/ethers-io/ethers.js/issues/201
diff --git a/packages/base-contract/package.json b/packages/base-contract/package.json
index 3b9383033..afde81561 100644
--- a/packages/base-contract/package.json
+++ b/packages/base-contract/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/base-contract",
-    "version": "0.3.4",
+    "version": "0.3.5",
     "engines": {
         "node": ">=6.12"
     },
@@ -30,8 +30,8 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/base-contract/README.md",
     "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
         "@types/lodash": "4.14.104",
         "chai": "^4.0.1",
         "copyfiles": "^1.2.0",
@@ -44,9 +44,9 @@
     },
     "dependencies": {
         "ethereum-types": "^0.0.2",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
-        "@0xproject/web3-wrapper": "^0.7.1",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
+        "@0xproject/web3-wrapper": "^0.7.2",
         "ethers": "3.0.22",
         "lodash": "^4.17.4"
     },
diff --git a/packages/connect/CHANGELOG.json b/packages/connect/CHANGELOG.json
index 9bbb107cb..c426f974b 100644
--- a/packages/connect/CHANGELOG.json
+++ b/packages/connect/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1531149657,
+        "version": "0.6.16",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.6.15",
         "changes": [
diff --git a/packages/connect/CHANGELOG.md b/packages/connect/CHANGELOG.md
index 1c44c2a60..5ae4cfbe3 100644
--- a/packages/connect/CHANGELOG.md
+++ b/packages/connect/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.6.16 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.6.15 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/connect/package.json b/packages/connect/package.json
index 02b23408e..469d47d33 100644
--- a/packages/connect/package.json
+++ b/packages/connect/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/connect",
-    "version": "0.6.15",
+    "version": "0.6.16",
     "engines": {
         "node": ">=6.12"
     },
@@ -51,20 +51,20 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/connect/README.md",
     "dependencies": {
-        "@0xproject/assert": "^0.2.12",
-        "@0xproject/json-schemas": "0.8.1",
-        "@0xproject/types": "^0.8.1",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
+        "@0xproject/assert": "^0.2.13",
+        "@0xproject/json-schemas": "0.8.2",
+        "@0xproject/types": "^0.8.2",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
         "isomorphic-fetch": "^2.2.1",
         "lodash": "^4.17.4",
         "query-string": "^5.0.1",
         "websocket": "^1.0.25"
     },
     "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
-        "@types/fetch-mock": "^5.12.1",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
+        "@types/fetch-mock": "^5.12.2",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
         "@types/query-string": "^5.0.1",
diff --git a/packages/contract-wrappers/CHANGELOG.json b/packages/contract-wrappers/CHANGELOG.json
index bee5a4de9..24f722f15 100644
--- a/packages/contract-wrappers/CHANGELOG.json
+++ b/packages/contract-wrappers/CHANGELOG.json
@@ -9,7 +9,8 @@
                 "note": "Update to v2 of 0x rpotocol",
                 "pr": 822
             }
-        ]
+        ],
+        "timestamp": 1531149657
     },
     {
         "timestamp": 1529397769,
diff --git a/packages/contract-wrappers/CHANGELOG.md b/packages/contract-wrappers/CHANGELOG.md
index 3f8eb921c..a2cc44f0d 100644
--- a/packages/contract-wrappers/CHANGELOG.md
+++ b/packages/contract-wrappers/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.1.0 - _July 9, 2018_
+
+    * Update Blockstream dep. to V5.0 and no longer force unsubscribe on blockstream error (which are not recoverable)
+
 ## v0.0.5 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/contract-wrappers/package.json b/packages/contract-wrappers/package.json
index 8c65c8cca..b8fd8bd50 100644
--- a/packages/contract-wrappers/package.json
+++ b/packages/contract-wrappers/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/contract-wrappers",
-    "version": "0.0.6",
+    "version": "0.1.0",
     "description": "Smart TS wrappers for 0x smart contracts",
     "keywords": [
         "0xproject",
@@ -43,13 +43,13 @@
         "node": ">=6.0.0"
     },
     "devDependencies": {
-        "@0xproject/abi-gen": "^0.3.2",
-        "@0xproject/dev-utils": "^0.4.4",
-        "@0xproject/migrations": "^0.0.8",
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/sol-compiler": "^0.5.2",
-        "@0xproject/subproviders": "^0.10.4",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/abi-gen": "^0.3.3",
+        "@0xproject/dev-utils": "^0.4.5",
+        "@0xproject/migrations": "^0.0.9",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/sol-compiler": "^0.5.3",
+        "@0xproject/subproviders": "^0.10.5",
+        "@0xproject/tslint-config": "^0.4.21",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
         "@types/node": "^8.0.53",
@@ -75,11 +75,11 @@
     },
     "dependencies": {
         "@0xproject/assert": "^0.3.0",
-        "@0xproject/base-contract": "^0.3.4",
+        "@0xproject/base-contract": "^0.3.5",
         "@0xproject/order-utils": "^1.0.0",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
-        "@0xproject/web3-wrapper": "^0.7.1",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
+        "@0xproject/web3-wrapper": "^0.7.2",
         "@0xproject/fill-scenarios": "^1.0.0",
         "@0xproject/json-schemas": "^1.0.0",
         "@0xproject/types": "^1.0.0",
diff --git a/packages/contract-wrappers/src/contract_wrappers/erc20_proxy_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/erc20_proxy_wrapper.ts
index 883d7c4d6..821d1a8a2 100644
--- a/packages/contract-wrappers/src/contract_wrappers/erc20_proxy_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/erc20_proxy_wrapper.ts
@@ -1,3 +1,4 @@
+import { AssetProxyId } from '@0xproject/types';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import { ContractAbi } from 'ethereum-types';
 import * as _ from 'lodash';
@@ -23,9 +24,9 @@ export class ERC20ProxyWrapper extends ContractWrapper {
      * Get the 4 bytes ID of this asset proxy
      * @return  Proxy id
      */
-    public async getProxyIdAsync(): Promise<string> {
+    public async getProxyIdAsync(): Promise<AssetProxyId> {
         const ERC20ProxyContractInstance = await this._getERC20ProxyContractAsync();
-        const proxyId = await ERC20ProxyContractInstance.getProxyId.callAsync();
+        const proxyId = (await ERC20ProxyContractInstance.getProxyId.callAsync()) as AssetProxyId;
         return proxyId;
     }
     /**
diff --git a/packages/contract-wrappers/src/contract_wrappers/erc721_proxy_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/erc721_proxy_wrapper.ts
index 648c150df..38ecd4687 100644
--- a/packages/contract-wrappers/src/contract_wrappers/erc721_proxy_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/erc721_proxy_wrapper.ts
@@ -1,3 +1,4 @@
+import { AssetProxyId } from '@0xproject/types';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import { ContractAbi } from 'ethereum-types';
 import * as _ from 'lodash';
@@ -23,9 +24,9 @@ export class ERC721ProxyWrapper extends ContractWrapper {
      * Get the 4 bytes ID of this asset proxy
      * @return  Proxy id
      */
-    public async getProxyIdAsync(): Promise<string> {
+    public async getProxyIdAsync(): Promise<AssetProxyId> {
         const ERC721ProxyContractInstance = await this._getERC721ProxyContractAsync();
-        const proxyId = await ERC721ProxyContractInstance.getProxyId.callAsync();
+        const proxyId = (await ERC721ProxyContractInstance.getProxyId.callAsync()) as AssetProxyId;
         return proxyId;
     }
     /**
diff --git a/packages/contract-wrappers/src/contract_wrappers/exchange_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/exchange_wrapper.ts
index 0e8664cc9..8b7148aed 100644
--- a/packages/contract-wrappers/src/contract_wrappers/exchange_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/exchange_wrapper.ts
@@ -1,5 +1,5 @@
 import { schemas } from '@0xproject/json-schemas';
-import { Order, SignedOrder } from '@0xproject/types';
+import { AssetProxyId, Order, SignedOrder } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import { ContractAbi, LogWithDecodedArgs } from 'ethereum-types';
@@ -9,7 +9,15 @@ import { artifacts } from '../artifacts';
 import { methodOptsSchema } from '../schemas/method_opts_schema';
 import { orderTxOptsSchema } from '../schemas/order_tx_opts_schema';
 import { txOptsSchema } from '../schemas/tx_opts_schema';
-import { BlockRange, EventCallback, IndexedFilterValues, MethodOpts, OrderInfo, OrderTransactionOpts } from '../types';
+import {
+    BlockRange,
+    EventCallback,
+    ExchangeWrapperError,
+    IndexedFilterValues,
+    MethodOpts,
+    OrderInfo,
+    OrderTransactionOpts,
+} from '../types';
 import { assert } from '../utils/assert';
 import { decorators } from '../utils/decorators';
 
@@ -38,21 +46,17 @@ export class ExchangeWrapper extends ContractWrapper {
     }
     /**
      * Retrieve the address of an asset proxy by signature.
-     * @param   proxySignature The 4 bytes signature of an asset proxy
+     * @param   proxyId        The 4 bytes signature of an asset proxy
      * @param   methodOpts     Optional arguments this method accepts.
      * @return  The address of an asset proxy for a given signature
      */
-    public async getAssetProxyBySignatureAsync(proxySignature: string, methodOpts: MethodOpts = {}): Promise<string> {
-        assert.isHexString('proxySignature', proxySignature);
+    public async getAssetProxyBySignatureAsync(proxyId: AssetProxyId, methodOpts: MethodOpts = {}): Promise<string> {
+        assert.doesBelongToStringEnum('proxyId', proxyId, AssetProxyId);
         assert.doesConformToSchema('methodOpts', methodOpts, methodOptsSchema);
         const exchangeContract = await this._getExchangeContractAsync();
 
         const txData = {};
-        const assetProxy = await exchangeContract.getAssetProxy.callAsync(
-            proxySignature,
-            txData,
-            methodOpts.defaultBlock,
-        );
+        const assetProxy = await exchangeContract.getAssetProxy.callAsync(proxyId, txData, methodOpts.defaultBlock);
         return assetProxy;
     }
     /**
@@ -143,7 +147,7 @@ export class ExchangeWrapper extends ContractWrapper {
         signedOrder: SignedOrder,
         takerAssetFillAmount: BigNumber,
         takerAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
         assert.isValidBaseUnitAmount('takerAssetFillAmount', takerAssetFillAmount);
@@ -152,6 +156,13 @@ export class ExchangeWrapper extends ContractWrapper {
         const normalizedTakerAddress = takerAddress.toLowerCase();
 
         const exchangeInstance = await this._getExchangeContractAsync();
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.fillOrder.callAsync(signedOrder, takerAssetFillAmount, signedOrder.signature, {
+                from: normalizedTakerAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
 
         const txHash = await exchangeInstance.fillOrder.sendTransactionAsync(
             signedOrder,
@@ -179,7 +190,7 @@ export class ExchangeWrapper extends ContractWrapper {
         signedOrder: SignedOrder,
         takerAssetFillAmount: BigNumber,
         takerAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
         assert.isValidBaseUnitAmount('takerAssetFillAmount', takerAssetFillAmount);
@@ -188,7 +199,18 @@ export class ExchangeWrapper extends ContractWrapper {
         const normalizedTakerAddress = takerAddress.toLowerCase();
 
         const exchangeInstance = await this._getExchangeContractAsync();
-
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.fillOrderNoThrow.callAsync(
+                signedOrder,
+                takerAssetFillAmount,
+                signedOrder.signature,
+                {
+                    from: normalizedTakerAddress,
+                    gas: orderTransactionOpts.gasLimit,
+                    gasPrice: orderTransactionOpts.gasPrice,
+                },
+            );
+        }
         const txHash = await exchangeInstance.fillOrderNoThrow.sendTransactionAsync(
             signedOrder,
             takerAssetFillAmount,
@@ -216,7 +238,7 @@ export class ExchangeWrapper extends ContractWrapper {
         signedOrder: SignedOrder,
         takerAssetFillAmount: BigNumber,
         takerAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
         assert.isValidBaseUnitAmount('takerAssetFillAmount', takerAssetFillAmount);
@@ -225,7 +247,13 @@ export class ExchangeWrapper extends ContractWrapper {
         const normalizedTakerAddress = takerAddress.toLowerCase();
 
         const exchangeInstance = await this._getExchangeContractAsync();
-
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.fillOrKillOrder.callAsync(signedOrder, takerAssetFillAmount, signedOrder.signature, {
+                from: normalizedTakerAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
         const txHash = await exchangeInstance.fillOrKillOrder.sendTransactionAsync(
             signedOrder,
             takerAssetFillAmount,
@@ -257,7 +285,7 @@ export class ExchangeWrapper extends ContractWrapper {
         data: string,
         signature: string,
         senderAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.isBigNumber('salt', salt);
         assert.isETHAddressHex('signerAddress', signerAddress);
@@ -268,7 +296,13 @@ export class ExchangeWrapper extends ContractWrapper {
         const normalizedSenderAddress = senderAddress.toLowerCase();
 
         const exchangeInstance = await this._getExchangeContractAsync();
-
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.executeTransaction.callAsync(salt, signerAddress, data, signature, {
+                from: normalizedSenderAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
         const txHash = await exchangeInstance.executeTransaction.sendTransactionAsync(
             salt,
             signerAddress,
@@ -296,7 +330,7 @@ export class ExchangeWrapper extends ContractWrapper {
         signedOrders: SignedOrder[],
         takerAssetFillAmounts: BigNumber[],
         takerAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
         _.forEach(takerAssetFillAmounts, takerAssetFillAmount =>
@@ -308,6 +342,13 @@ export class ExchangeWrapper extends ContractWrapper {
 
         const exchangeInstance = await this._getExchangeContractAsync();
         const signatures = _.map(signedOrders, signedOrder => signedOrder.signature);
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.batchFillOrders.callAsync(signedOrders, takerAssetFillAmounts, signatures, {
+                from: normalizedTakerAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
         const txHash = await exchangeInstance.batchFillOrders.sendTransactionAsync(
             signedOrders,
             takerAssetFillAmounts,
@@ -334,7 +375,7 @@ export class ExchangeWrapper extends ContractWrapper {
         signedOrders: SignedOrder[],
         makerAssetFillAmount: BigNumber,
         takerAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
         assert.isBigNumber('makerAssetFillAmount', makerAssetFillAmount);
@@ -344,6 +385,13 @@ export class ExchangeWrapper extends ContractWrapper {
 
         const exchangeInstance = await this._getExchangeContractAsync();
         const signatures = _.map(signedOrders, signedOrder => signedOrder.signature);
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.marketBuyOrders.callAsync(signedOrders, makerAssetFillAmount, signatures, {
+                from: normalizedTakerAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
         const txHash = await exchangeInstance.marketBuyOrders.sendTransactionAsync(
             signedOrders,
             makerAssetFillAmount,
@@ -370,7 +418,7 @@ export class ExchangeWrapper extends ContractWrapper {
         signedOrders: SignedOrder[],
         takerAssetFillAmount: BigNumber,
         takerAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
         assert.isBigNumber('takerAssetFillAmount', takerAssetFillAmount);
@@ -380,6 +428,13 @@ export class ExchangeWrapper extends ContractWrapper {
 
         const exchangeInstance = await this._getExchangeContractAsync();
         const signatures = _.map(signedOrders, signedOrder => signedOrder.signature);
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.marketSellOrders.callAsync(signedOrders, takerAssetFillAmount, signatures, {
+                from: normalizedTakerAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
         const txHash = await exchangeInstance.marketSellOrders.sendTransactionAsync(
             signedOrders,
             takerAssetFillAmount,
@@ -406,7 +461,7 @@ export class ExchangeWrapper extends ContractWrapper {
         signedOrders: SignedOrder[],
         makerAssetFillAmount: BigNumber,
         takerAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
         assert.isBigNumber('makerAssetFillAmount', makerAssetFillAmount);
@@ -416,6 +471,13 @@ export class ExchangeWrapper extends ContractWrapper {
 
         const exchangeInstance = await this._getExchangeContractAsync();
         const signatures = _.map(signedOrders, signedOrder => signedOrder.signature);
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.marketBuyOrdersNoThrow.callAsync(signedOrders, makerAssetFillAmount, signatures, {
+                from: normalizedTakerAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
         const txHash = await exchangeInstance.marketBuyOrdersNoThrow.sendTransactionAsync(
             signedOrders,
             makerAssetFillAmount,
@@ -442,7 +504,7 @@ export class ExchangeWrapper extends ContractWrapper {
         signedOrders: SignedOrder[],
         takerAssetFillAmount: BigNumber,
         takerAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
         assert.isBigNumber('takerAssetFillAmount', takerAssetFillAmount);
@@ -452,6 +514,13 @@ export class ExchangeWrapper extends ContractWrapper {
 
         const exchangeInstance = await this._getExchangeContractAsync();
         const signatures = _.map(signedOrders, signedOrder => signedOrder.signature);
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.marketSellOrdersNoThrow.callAsync(signedOrders, takerAssetFillAmount, signatures, {
+                from: normalizedTakerAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
         const txHash = await exchangeInstance.marketSellOrdersNoThrow.sendTransactionAsync(
             signedOrders,
             takerAssetFillAmount,
@@ -478,7 +547,7 @@ export class ExchangeWrapper extends ContractWrapper {
         signedOrders: SignedOrder[],
         takerAssetFillAmounts: BigNumber[],
         takerAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
         _.forEach(takerAssetFillAmounts, takerAssetFillAmount =>
@@ -490,6 +559,13 @@ export class ExchangeWrapper extends ContractWrapper {
 
         const exchangeInstance = await this._getExchangeContractAsync();
         const signatures = _.map(signedOrders, signedOrder => signedOrder.signature);
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.batchFillOrdersNoThrow.callAsync(signedOrders, takerAssetFillAmounts, signatures, {
+                from: normalizedTakerAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
         const txHash = await exchangeInstance.batchFillOrdersNoThrow.sendTransactionAsync(
             signedOrders,
             takerAssetFillAmounts,
@@ -516,7 +592,7 @@ export class ExchangeWrapper extends ContractWrapper {
         signedOrders: SignedOrder[],
         takerAssetFillAmounts: BigNumber[],
         takerAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
         _.forEach(takerAssetFillAmounts, takerAssetFillAmount =>
@@ -528,6 +604,13 @@ export class ExchangeWrapper extends ContractWrapper {
 
         const exchangeInstance = await this._getExchangeContractAsync();
         const signatures = _.map(signedOrders, signedOrder => signedOrder.signature);
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.batchFillOrKillOrders.callAsync(signedOrders, takerAssetFillAmounts, signatures, {
+                from: normalizedTakerAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
         const txHash = await exchangeInstance.batchFillOrKillOrders.sendTransactionAsync(
             signedOrders,
             takerAssetFillAmounts,
@@ -549,7 +632,7 @@ export class ExchangeWrapper extends ContractWrapper {
     @decorators.asyncZeroExErrorHandler
     public async batchCancelOrdersAsync(
         orders: Array<Order | SignedOrder>,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.doesConformToSchema('orders', orders, schemas.ordersSchema);
         assert.doesConformToSchema('orderTransactionOpts', orderTransactionOpts, orderTxOptsSchema, [txOptsSchema]);
@@ -559,6 +642,13 @@ export class ExchangeWrapper extends ContractWrapper {
         const normalizedMakerAddress = makerAddress.toLowerCase();
 
         const exchangeInstance = await this._getExchangeContractAsync();
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.batchCancelOrders.callAsync(orders, {
+                from: normalizedMakerAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
         const txHash = await exchangeInstance.batchCancelOrders.sendTransactionAsync(orders, {
             from: normalizedMakerAddress,
             gas: orderTransactionOpts.gasLimit,
@@ -581,17 +671,37 @@ export class ExchangeWrapper extends ContractWrapper {
         leftSignedOrder: SignedOrder,
         rightSignedOrder: SignedOrder,
         takerAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.doesConformToSchema('leftSignedOrder', leftSignedOrder, schemas.signedOrderSchema);
         assert.doesConformToSchema('rightSignedOrder', rightSignedOrder, schemas.signedOrderSchema);
         await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
         assert.doesConformToSchema('orderTransactionOpts', orderTransactionOpts, orderTxOptsSchema, [txOptsSchema]);
         const normalizedTakerAddress = takerAddress.toLowerCase();
-        // TODO(logvinov): Check that:
-        // rightOrder.makerAssetData === leftOrder.takerAssetData;
-        // rightOrder.takerAssetData === leftOrder.makerAssetData;
+        if (
+            rightSignedOrder.makerAssetData !== leftSignedOrder.takerAssetData ||
+            rightSignedOrder.takerAssetData !== leftSignedOrder.makerAssetData
+        ) {
+            throw new Error(ExchangeWrapperError.AssetDataMismatch);
+        } else {
+            // Smart contracts assigns the asset data from the left order to the right one so we can save gas on reducing the size of call data
+            rightSignedOrder.makerAssetData = '0x';
+            rightSignedOrder.takerAssetData = '0x';
+        }
         const exchangeInstance = await this._getExchangeContractAsync();
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.matchOrders.callAsync(
+                leftSignedOrder,
+                rightSignedOrder,
+                leftSignedOrder.signature,
+                rightSignedOrder.signature,
+                {
+                    from: normalizedTakerAddress,
+                    gas: orderTransactionOpts.gasLimit,
+                    gasPrice: orderTransactionOpts.gasPrice,
+                },
+            );
+        }
         const txHash = await exchangeInstance.matchOrders.sendTransactionAsync(
             leftSignedOrder,
             rightSignedOrder,
@@ -620,7 +730,7 @@ export class ExchangeWrapper extends ContractWrapper {
         signerAddress: string,
         signature: string,
         senderAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.isHexString('hash', hash);
         assert.isETHAddressHex('signerAddress', signerAddress);
@@ -629,6 +739,13 @@ export class ExchangeWrapper extends ContractWrapper {
         assert.doesConformToSchema('orderTransactionOpts', orderTransactionOpts, orderTxOptsSchema, [txOptsSchema]);
         const normalizedTakerAddress = senderAddress.toLowerCase();
         const exchangeInstance = await this._getExchangeContractAsync();
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.preSign.callAsync(hash, signerAddress, signature, {
+                from: normalizedTakerAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
         const txHash = await exchangeInstance.preSign.sendTransactionAsync(hash, signerAddress, signature, {
             from: normalizedTakerAddress,
             gas: orderTransactionOpts.gasLimit,
@@ -769,7 +886,7 @@ export class ExchangeWrapper extends ContractWrapper {
     @decorators.asyncZeroExErrorHandler
     public async cancelOrderAsync(
         order: Order | SignedOrder,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.doesConformToSchema('order', order, schemas.orderSchema);
         await assert.isSenderAddressAsync('order.maker', order.makerAddress, this._web3Wrapper);
@@ -777,6 +894,13 @@ export class ExchangeWrapper extends ContractWrapper {
         const normalizedMakerAddress = order.makerAddress.toLowerCase();
 
         const exchangeInstance = await this._getExchangeContractAsync();
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.cancelOrder.callAsync(order, {
+                from: normalizedMakerAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
         const txHash = await exchangeInstance.cancelOrder.sendTransactionAsync(order, {
             from: normalizedMakerAddress,
             gas: orderTransactionOpts.gasLimit,
@@ -797,7 +921,7 @@ export class ExchangeWrapper extends ContractWrapper {
         validatorAddress: string,
         isApproved: boolean,
         senderAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.isETHAddressHex('validatorAddress', validatorAddress);
         assert.isBoolean('isApproved', isApproved);
@@ -806,6 +930,13 @@ export class ExchangeWrapper extends ContractWrapper {
         const normalizedSenderAddress = senderAddress.toLowerCase();
 
         const exchangeInstance = await this._getExchangeContractAsync();
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.setSignatureValidatorApproval.callAsync(validatorAddress, isApproved, {
+                from: normalizedSenderAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
         const txHash = await exchangeInstance.setSignatureValidatorApproval.sendTransactionAsync(
             validatorAddress,
             isApproved,
@@ -829,7 +960,7 @@ export class ExchangeWrapper extends ContractWrapper {
     public async cancelOrdersUpToAsync(
         targetOrderEpoch: BigNumber,
         senderAddress: string,
-        orderTransactionOpts: OrderTransactionOpts = {},
+        orderTransactionOpts: OrderTransactionOpts = { shouldValidate: true },
     ): Promise<string> {
         assert.isBigNumber('targetOrderEpoch', targetOrderEpoch);
         await assert.isSenderAddressAsync('senderAddress', senderAddress, this._web3Wrapper);
@@ -837,6 +968,13 @@ export class ExchangeWrapper extends ContractWrapper {
         const normalizedSenderAddress = senderAddress.toLowerCase();
 
         const exchangeInstance = await this._getExchangeContractAsync();
+        if (orderTransactionOpts.shouldValidate) {
+            await exchangeInstance.cancelOrdersUpTo.callAsync(targetOrderEpoch, {
+                from: normalizedSenderAddress,
+                gas: orderTransactionOpts.gasLimit,
+                gasPrice: orderTransactionOpts.gasPrice,
+            });
+        }
         const txHash = await exchangeInstance.cancelOrdersUpTo.sendTransactionAsync(targetOrderEpoch, {
             from: normalizedSenderAddress,
             gas: orderTransactionOpts.gasLimit,
diff --git a/packages/contract-wrappers/src/types.ts b/packages/contract-wrappers/src/types.ts
index 8d19d085f..f9d7a6b9f 100644
--- a/packages/contract-wrappers/src/types.ts
+++ b/packages/contract-wrappers/src/types.ts
@@ -8,6 +8,10 @@ import { ERC721TokenEventArgs, ERC721TokenEvents } from './contract_wrappers/gen
 import { ExchangeEventArgs, ExchangeEvents } from './contract_wrappers/generated/exchange';
 import { WETH9EventArgs, WETH9Events } from './contract_wrappers/generated/weth9';
 
+export enum ExchangeWrapperError {
+    AssetDataMismatch = 'ASSET_DATA_MISMATCH',
+}
+
 export enum ContractWrappersError {
     ExchangeContractDoesNotExist = 'EXCHANGE_CONTRACT_DOES_NOT_EXIST',
     ZRXContractDoesNotExist = 'ZRX_CONTRACT_DOES_NOT_EXIST',
@@ -31,8 +35,6 @@ export enum ContractWrappersError {
 
 export enum InternalContractWrappersError {
     NoAbiDecoder = 'NO_ABI_DECODER',
-    ZrxNotInTokenRegistry = 'ZRX_NOT_IN_TOKEN_REGISTRY',
-    WethNotInTokenRegistry = 'WETH_NOT_IN_TOKEN_REGISTRY',
 }
 
 export type LogEvent = LogEntryEvent;
diff --git a/packages/contract-wrappers/src/utils/constants.ts b/packages/contract-wrappers/src/utils/constants.ts
index 76d805cac..039475b7f 100644
--- a/packages/contract-wrappers/src/utils/constants.ts
+++ b/packages/contract-wrappers/src/utils/constants.ts
@@ -4,6 +4,7 @@ export const constants = {
     NULL_ADDRESS: '0x0000000000000000000000000000000000000000',
     TESTRPC_NETWORK_ID: 50,
     INVALID_JUMP_PATTERN: 'invalid JUMP at',
+    REVERT: 'revert',
     OUT_OF_GAS_PATTERN: 'out of gas',
     INVALID_TAKER_FORMAT: 'instance.taker is not of a type(s) string',
     // tslint:disable-next-line:custom-no-magic-numbers
diff --git a/packages/contract-wrappers/src/utils/decorators.ts b/packages/contract-wrappers/src/utils/decorators.ts
index ccb4c6e11..6e77450e8 100644
--- a/packages/contract-wrappers/src/utils/decorators.ts
+++ b/packages/contract-wrappers/src/utils/decorators.ts
@@ -1,3 +1,4 @@
+import { RevertReason } from '@0xproject/types';
 import * as _ from 'lodash';
 
 import { AsyncMethod, ContractWrappersError, SyncMethod } from '../types';
@@ -13,6 +14,10 @@ const contractCallErrorTransformer = (error: Error) => {
     if (_.includes(error.message, constants.OUT_OF_GAS_PATTERN)) {
         return new Error(ContractWrappersError.OutOfGas);
     }
+    if (_.includes(error.message, constants.REVERT)) {
+        const revertReason = error.message.split(constants.REVERT)[1].trim();
+        return new Error(revertReason);
+    }
     return error;
 };
 
diff --git a/packages/contract_templates/contract.handlebars b/packages/contract_templates/contract.handlebars
index d0f74a2bc..0810c4d90 100644
--- a/packages/contract_templates/contract.handlebars
+++ b/packages/contract_templates/contract.handlebars
@@ -27,6 +27,7 @@ export enum {{contractName}}Events {
 {{/each}}
 {{/if}}
 
+/* istanbul ignore next */
 // tslint:disable:no-parameter-reassignment
 // tslint:disable-next-line:class-name
 export class {{contractName}}Contract extends BaseContract {
diff --git a/packages/contract_templates/partials/callAsync.handlebars b/packages/contract_templates/partials/callAsync.handlebars
index 35fbe3c85..fcaae57c6 100644
--- a/packages/contract_templates/partials/callAsync.handlebars
+++ b/packages/contract_templates/partials/callAsync.handlebars
@@ -1,4 +1,3 @@
-{{#hasReturnValue}}
 async callAsync(
 {{> typed_params inputs=inputs}}
     callData: Partial<CallData> = {},
@@ -27,4 +26,3 @@ async callAsync(
     resultArray = BaseContract._formatABIDataItemList(outputAbi, resultArray, BaseContract._bnToBigNumber.bind(this));
     return resultArray{{#singleReturnValue}}[0]{{/singleReturnValue}};
 },
-{{/hasReturnValue}}
diff --git a/packages/contracts/.solhint.json b/packages/contracts/.solhint.json
index 7e3b4dca2..076afe9f3 100644
--- a/packages/contracts/.solhint.json
+++ b/packages/contracts/.solhint.json
@@ -1,17 +1,20 @@
 {
     "extends": "default",
     "rules": {
-        "bracket-align": "warn",
-        "code-complexity": "warn",
-        "const-name-snakecase": "warn",
-        "expression-indent": "warn",
-        "function-max-lines": "warn",
-        "statement-indent": "warn",
-        "indent": ["warn", 4],
+        "avoid-low-level-calls": false,
+        "avoid-tx-origin": "warn",
+        "bracket-align": false,
+        "code-complexity": false,
+        "const-name-snakecase": "error",
+        "expression-indent": "error",
+        "function-max-lines": false,
+        "func-order": "error",
+        "indent": ["error", 4],
+        "max-line-length": ["warn", 160],
+        "no-inline-assembly": false,
         "quotes": ["error", "double"],
-        "max-line-length": ["warn", 120],
-        "separate-by-one-line-in-contract": "warn",
+        "separate-by-one-line-in-contract": "error",
         "space-after-comma": "error",
-        "func-order": "warn"
+        "statement-indent": "error"
     }
 }
diff --git a/packages/contracts/package.json b/packages/contracts/package.json
index a8bbdbe16..98b133e63 100644
--- a/packages/contracts/package.json
+++ b/packages/contracts/package.json
@@ -1,7 +1,7 @@
 {
     "private": true,
     "name": "contracts",
-    "version": "2.1.33",
+    "version": "2.1.34",
     "engines": {
         "node": ">=6.12"
     },
@@ -24,13 +24,13 @@
         "compile": "sol-compiler --contracts-dir src",
         "clean": "shx rm -rf lib generated_contract_wrappers",
         "generate_contract_wrappers": "abi-gen --abis  ${npm_package_config_abis} --template ../contract_templates/contract.handlebars --partials '../contract_templates/partials/**/*.handlebars' --output generated_contract_wrappers --backend ethers",
-        "lint": "tslint --project . --exclude **/src/generated_contract_wrappers/**/* --exclude **/lib/**/*",
+        "lint": "tslint --project . --exclude **/src/generated_contract_wrappers/**/* --exclude **/lib/**/* && yarn lint-contracts",
         "coverage:report:text": "istanbul report text",
         "coverage:report:html": "istanbul report html && open coverage/index.html",
         "profiler:report:html": "istanbul report html && open coverage/index.html",
         "coverage:report:lcov": "istanbul report lcov",
         "test:circleci": "yarn test",
-        "lint-contracts": "solhint src/2.0.0/**/*.sol"
+        "lint-contracts": "solhint src/2.0.0/**/**/**/**/*.sol"
     },
     "config": {
         "abis": "../migrations/artifacts/2.0.0/@(AssetProxyOwner|DummyERC20Token|DummyERC721Receiver|DummyERC721Token|ERC20Proxy|ERC721Proxy|Forwarder|Exchange|ExchangeWrapper|IAssetData|IAssetProxy|MixinAuthorizable|MultiSigWallet|MultiSigWalletWithTimeLock|TestAssetProxyOwner|TestAssetProxyDispatcher|TestLibBytes|TestLibs|TestSignatureValidator|TestValidator|TestWallet|TokenRegistry|Whitelist|WETH9|ZRXToken).json"
@@ -46,11 +46,11 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/contracts/README.md",
     "devDependencies": {
-        "@0xproject/abi-gen": "^0.3.2",
-        "@0xproject/dev-utils": "^0.4.4",
-        "@0xproject/tslint-config": "^0.4.20",
-        "@0xproject/subproviders": "^0.10.1",
-        "@0xproject/sol-cov": "^0.1.1",
+        "@0xproject/abi-gen": "^0.3.3",
+        "@0xproject/dev-utils": "^0.4.5",
+        "@0xproject/tslint-config": "^0.4.21",
+        "@0xproject/subproviders": "^0.10.5",
+        "@0xproject/sol-cov": "^0.1.2",
         "@types/lodash": "4.14.104",
         "@types/bn.js": "^4.11.0",
         "@types/node": "^8.0.53",
@@ -72,13 +72,13 @@
         "yargs": "^10.0.3"
     },
     "dependencies": {
-        "@0xproject/base-contract": "^0.3.4",
+        "@0xproject/base-contract": "^0.3.5",
         "@0xproject/order-utils": "^1.0.0",
-        "@0xproject/sol-compiler": "^0.5.2",
+        "@0xproject/sol-compiler": "^0.5.3",
         "@0xproject/types": "^1.0.0",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
-        "@0xproject/web3-wrapper": "^0.7.1",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
+        "@0xproject/web3-wrapper": "^0.7.2",
         "ethereum-types": "^0.0.2",
         "bn.js": "^4.11.8",
         "ethereumjs-abi": "^0.6.4",
diff --git a/packages/contracts/src/2.0.0/forwarder/Forwarder.sol b/packages/contracts/src/2.0.0/forwarder/Forwarder.sol
index 71a4aff13..fc17a4c72 100644
--- a/packages/contracts/src/2.0.0/forwarder/Forwarder.sol
+++ b/packages/contracts/src/2.0.0/forwarder/Forwarder.sol
@@ -16,24 +16,25 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
-import "./MixinWethFees.sol";
-import "./MixinMarketSellTokens.sol";
-import "./MixinMarketBuyTokens.sol";
+import "./MixinFees.sol";
+import "./MixinForwarderCore.sol";
 import "./MixinConstants.sol";
-import "../utils/Ownable/Ownable.sol";
+import "./MixinMarketBuyZrx.sol";
+import "./MixinExpectedResults.sol";
+import "./MixinTransfer.sol";
+
 
 contract Forwarder is
-    Ownable,
     MixinConstants,
-    MixinWethFees,
+    MixinExpectedResults,
+    MixinFees,
     MixinMarketBuyZrx,
-    MixinMarketBuyTokens,
-    MixinMarketSellTokens
+    MixinTransfer,
+    MixinForwarderCore
 {
-    uint256 MAX_UINT = 2**256 - 1;
 
     constructor (
         address _exchange,
@@ -44,7 +45,6 @@ contract Forwarder is
         bytes memory _wethAssetData
     )
         public
-        Ownable()
         MixinConstants(
             _exchange,
             _etherToken,
@@ -52,30 +52,6 @@ contract Forwarder is
             _zrxAssetData,
             _wethAssetData
         )
-    {
-        setERC20ProxyApproval(_erc20AssetProxyId);
-    }
-
-    /// @dev Default payabale function, this allows us to withdraw WETH
-    function ()
-        public
-        payable
-    {
-        require(
-            msg.sender == address(ETHER_TOKEN),
-            "DEFAULT_FUNCTION_WETH_CONTRACT_ONLY"
-        );
-    }
-
-    /// @dev Sets the allowances to the proxy for this contract
-    function setERC20ProxyApproval(bytes4 erc20AssetProxyId)
-        public
-        onlyOwner
-    {
-        address proxyAddress = EXCHANGE.getAssetProxy(erc20AssetProxyId);
-        if (proxyAddress != address(0)) {
-            ETHER_TOKEN.approve(proxyAddress, MAX_UINT);
-            ZRX_TOKEN.approve(proxyAddress, MAX_UINT);
-        }
-    }
+        MixinForwarderCore()
+    {}
 }
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinConstants.sol b/packages/contracts/src/2.0.0/forwarder/MixinConstants.sol
index 18f2ba3bc..2b064d579 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinConstants.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinConstants.sol
@@ -16,19 +16,14 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
-import "../protocol/Exchange/Exchange.sol";
-import { WETH9 as EtherToken } from "../tokens/WETH9/WETH9.sol";
-import "../tokens/ERC20Token/IERC20Token.sol";
+import "./mixins/MConstants.sol";
 
-contract MixinConstants {
 
-    Exchange EXCHANGE;
-    EtherToken ETHER_TOKEN;
-    IERC20Token ZRX_TOKEN;
-    bytes ZRX_ASSET_DATA;
-    bytes WETH_ASSET_DATA;
+contract MixinConstants is
+    MConstants
+{
 
     constructor (
         address _exchange,
@@ -39,11 +34,10 @@ contract MixinConstants {
     )
         public
     {
-        EXCHANGE = Exchange(_exchange);
-        ETHER_TOKEN = EtherToken(_etherToken);
+        EXCHANGE = IExchange(_exchange);
+        ETHER_TOKEN = IEtherToken(_etherToken);
         ZRX_TOKEN = IERC20Token(_zrxToken);
         ZRX_ASSET_DATA = _zrxAssetData;
         WETH_ASSET_DATA = _wethAssetData;
     }
-
-}
\ No newline at end of file
+}
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinERC721.sol b/packages/contracts/src/2.0.0/forwarder/MixinERC721.sol
deleted file mode 100644
index b2e8803a9..000000000
--- a/packages/contracts/src/2.0.0/forwarder/MixinERC721.sol
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
-
-import "../utils/LibBytes/LibBytes.sol";
-import "../tokens/ERC721Token/IERC721Token.sol";
-
-contract MixinERC721 {
-
-    using LibBytes for bytes;
-    bytes4 constant ERC721_RECEIVED = bytes4(keccak256("onERC721Received(address,uint256,bytes)"));
-    bytes4 constant ERC721_RECEIVED_OPERATOR = bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"));
-
-    function onERC721Received(address, uint256, bytes memory)
-        public
-        pure
-        returns(bytes4)
-    {
-        return ERC721_RECEIVED;
-    }
-
-    function onERC721Received(address, address, uint256, bytes memory)
-        public
-        pure
-        returns(bytes4)
-    {
-        return ERC721_RECEIVED_OPERATOR;
-    }
-
-    function transferERC721Token(
-        bytes memory assetData,
-        address to
-    )
-        internal
-    {
-        // Decode asset data.
-        address token = assetData.readAddress(16);
-        uint256 tokenId = assetData.readUint256(36);
-        bytes memory receiverData = assetData.readBytesWithLength(100);
-        IERC721Token(token).safeTransferFrom(
-            address(this),
-            to,
-            tokenId,
-            receiverData
-        );
-    }
-}
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinErrorMessages.sol b/packages/contracts/src/2.0.0/forwarder/MixinErrorMessages.sol
index c2a6ea0a4..1b3e3f488 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinErrorMessages.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinErrorMessages.sol
@@ -16,7 +16,9 @@
 
 */
 
-pragma solidity ^0.4.24;
+// solhint-disable
+pragma solidity 0.4.24;
+
 
 /// This contract is intended to serve as a reference, but is not actually used for efficiency reasons.
 contract MixinErrorMessages {
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol b/packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol
index 0bca7dc80..a575c9675 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol
@@ -16,106 +16,71 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "../utils/LibBytes/LibBytes.sol";
 import "../protocol/Exchange/libs/LibFillResults.sol";
 import "../protocol/Exchange/libs/LibMath.sol";
 import "../protocol/Exchange/libs/LibOrder.sol";
-import "./MixinConstants.sol";
+import "./mixins/MConstants.sol";
+import "./mixins/MExpectedResults.sol";
+
 
 contract MixinExpectedResults is
     LibMath,
     LibFillResults,
-    MixinConstants
+    MConstants,
+    MExpectedResults
 {
 
-    /// @dev Simulates the 0x Exchange fillOrder validation and calculations, without performing any state changes.
-    /// @param order An Order struct containing order specifications.
-    /// @param takerAssetFillAmount A number representing the amount of this order to fill.
-    /// @return fillResults Amounts filled and fees paid by maker and taker.
-    function calculateFillResults(
-        LibOrder.Order memory order,
-        uint256 takerAssetFillAmount
-    )
-        internal
-        view
-        returns (FillResults memory fillResults)
-    {
-        LibOrder.OrderInfo memory orderInfo = EXCHANGE.getOrderInfo(order);
-        if (orderInfo.orderStatus != uint8(LibOrder.OrderStatus.FILLABLE)) {
-            return fillResults;
-        }
-        uint256 remainingTakerAssetAmount = safeSub(order.takerAssetAmount, orderInfo.orderTakerAssetFilledAmount);
-        uint256 takerAssetFilledAmount = min256(takerAssetFillAmount, remainingTakerAssetAmount);
-
-        fillResults.takerAssetFilledAmount = takerAssetFilledAmount;
-        fillResults.makerAssetFilledAmount = getPartialAmount(
-            takerAssetFilledAmount,
-            order.takerAssetAmount,
-            order.makerAssetAmount
-        );
-        fillResults.makerFeePaid = getPartialAmount(
-            takerAssetFilledAmount,
-            order.takerAssetAmount,
-            order.makerFee
-        );
-        fillResults.takerFeePaid = getPartialAmount(
-            takerAssetFilledAmount,
-            order.takerAssetAmount,
-            order.takerFee
-        );
-        return fillResults;
-    }
-
-    /// @dev Calculates a FillResults total for selling takerAssetFillAmount over all orders. 
+    /// @dev Calculates a total FillResults for buying makerAssetFillAmount over all orders.
     ///      Including the fees required to be paid. 
     /// @param orders An array of Order struct containing order specifications.
-    /// @param takerAssetFillAmount A number representing the amount of this order to fill.
+    /// @param makerAssetFillAmount A number representing the amount of this order to fill.
     /// @return totalFillResults Amounts filled and fees paid by maker and taker.
-    function calculateMarketSellResults(
+    function calculateMarketBuyResults(
         LibOrder.Order[] memory orders,
-        uint256 takerAssetFillAmount
+        uint256 makerAssetFillAmount
     )
-        internal
+        public
         view
         returns (FillResults memory totalFillResults)
     {
         for (uint256 i = 0; i < orders.length; i++) {
-            uint256 remainingTakerAssetFillAmount = safeSub(takerAssetFillAmount, totalFillResults.takerAssetFilledAmount);
+            uint256 remainingMakerAssetFillAmount = safeSub(makerAssetFillAmount, totalFillResults.makerAssetFilledAmount);
+            uint256 remainingTakerAssetFillAmount = getPartialAmount(
+                orders[i].takerAssetAmount,
+                orders[i].makerAssetAmount,
+                remainingMakerAssetFillAmount
+            );
             FillResults memory singleFillResult = calculateFillResults(orders[i], remainingTakerAssetFillAmount);
             addFillResults(totalFillResults, singleFillResult);
-            if (totalFillResults.takerAssetFilledAmount == takerAssetFillAmount) {
+            if (totalFillResults.makerAssetFilledAmount == makerAssetFillAmount) {
                 break;
             }
         }
         return totalFillResults;
     }
 
-    /// @dev Calculates a total FillResults for buying makerAssetFillAmount over all orders.
+    /// @dev Calculates a FillResults total for selling takerAssetFillAmount over all orders. 
     ///      Including the fees required to be paid. 
     /// @param orders An array of Order struct containing order specifications.
-    /// @param makerAssetFillAmount A number representing the amount of this order to fill.
+    /// @param takerAssetFillAmount A number representing the amount of this order to fill.
     /// @return totalFillResults Amounts filled and fees paid by maker and taker.
-    function calculateMarketBuyResults(
+    function calculateMarketSellResults(
         LibOrder.Order[] memory orders,
-        uint256 makerAssetFillAmount
+        uint256 takerAssetFillAmount
     )
         public
         view
         returns (FillResults memory totalFillResults)
     {
         for (uint256 i = 0; i < orders.length; i++) {
-            uint256 remainingMakerAssetFillAmount = safeSub(makerAssetFillAmount, totalFillResults.makerAssetFilledAmount);
-            uint256 remainingTakerAssetFillAmount = getPartialAmount(
-                orders[i].takerAssetAmount,
-                orders[i].makerAssetAmount,
-                remainingMakerAssetFillAmount
-            );
+            uint256 remainingTakerAssetFillAmount = safeSub(takerAssetFillAmount, totalFillResults.takerAssetFilledAmount);
             FillResults memory singleFillResult = calculateFillResults(orders[i], remainingTakerAssetFillAmount);
             addFillResults(totalFillResults, singleFillResult);
-            if (totalFillResults.makerAssetFilledAmount == makerAssetFillAmount) {
+            if (totalFillResults.takerAssetFilledAmount == takerAssetFillAmount) {
                 break;
             }
         }
@@ -155,4 +120,42 @@ contract MixinExpectedResults is
         }
         return totalFillResults;
     }
+
+    /// @dev Simulates the 0x Exchange fillOrder validation and calculations, without performing any state changes.
+    /// @param order An Order struct containing order specifications.
+    /// @param takerAssetFillAmount A number representing the amount of this order to fill.
+    /// @return fillResults Amounts filled and fees paid by maker and taker.
+    function calculateFillResults(
+        LibOrder.Order memory order,
+        uint256 takerAssetFillAmount
+    )
+        internal
+        view
+        returns (FillResults memory fillResults)
+    {
+        LibOrder.OrderInfo memory orderInfo = EXCHANGE.getOrderInfo(order);
+        if (orderInfo.orderStatus != uint8(LibOrder.OrderStatus.FILLABLE)) {
+            return fillResults;
+        }
+        uint256 remainingTakerAssetAmount = safeSub(order.takerAssetAmount, orderInfo.orderTakerAssetFilledAmount);
+        uint256 takerAssetFilledAmount = min256(takerAssetFillAmount, remainingTakerAssetAmount);
+
+        fillResults.takerAssetFilledAmount = takerAssetFilledAmount;
+        fillResults.makerAssetFilledAmount = getPartialAmount(
+            takerAssetFilledAmount,
+            order.takerAssetAmount,
+            order.makerAssetAmount
+        );
+        fillResults.makerFeePaid = getPartialAmount(
+            takerAssetFilledAmount,
+            order.takerAssetAmount,
+            order.makerFee
+        );
+        fillResults.takerFeePaid = getPartialAmount(
+            takerAssetFilledAmount,
+            order.takerAssetAmount,
+            order.takerFee
+        );
+        return fillResults;
+    }
 }
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinWethFees.sol b/packages/contracts/src/2.0.0/forwarder/MixinFees.sol
index 9206c5fe0..8ea00a1d5 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinWethFees.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinFees.sol
@@ -16,21 +16,33 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
-import { WETH9 as EtherToken } from "../tokens/WETH9/WETH9.sol";
 import "../protocol/Exchange/libs/LibMath.sol";
-import "./MixinConstants.sol";
+import "./mixins/MConstants.sol";
+import "./mixins/MFees.sol";
 
-contract MixinWethFees is
+
+contract MixinFees is
     LibMath,
-    MixinConstants
+    MConstants,
+    MFees
 {
 
-    uint16  constant public PERCENTAGE_DENOMINATOR = 10000; // 9800 == 98%, 10000 == 100%
-    uint16  constant public MAX_FEE = 1000; // 10%
-    uint16  constant public ALLOWABLE_EXCHANGE_PERCENTAGE = 9500; // 95%
+    uint16 constant public PERCENTAGE_DENOMINATOR = 10000; // 9800 == 98%, 10000 == 100%
+    uint16 constant public MAX_FEE = 1000; // 10%
+    uint16 constant public ALLOWABLE_EXCHANGE_PERCENTAGE = 9500; // 95%
+
+    /// @dev Default payabale function, this allows us to withdraw WETH
+    function ()
+        public
+        payable
+    {
+        require(
+            msg.sender == address(ETHER_TOKEN),
+            "DEFAULT_FUNCTION_WETH_CONTRACT_ONLY"
+        );
+    }
 
     /// @dev Pays the feeRecipient feeProportion of the total takerEthAmount, denominated in ETH
     /// @param takerEthAmount The total amount that was transacted in WETH, fees are calculated from this value.
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinMarketBuyTokens.sol b/packages/contracts/src/2.0.0/forwarder/MixinForwarderCore.sol
index ef06fe519..eadeaf5ba 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinMarketBuyTokens.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinForwarderCore.sol
@@ -16,28 +16,122 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "../utils/LibBytes/LibBytes.sol";
-import "./MixinWethFees.sol";
-import "./MixinMarketBuyZrx.sol";
-import "./MixinExpectedResults.sol";
-import "./MixinERC20.sol";
-import "./MixinERC721.sol";
-import "./MixinConstants.sol";
+import "./mixins/MFees.sol";
+import "./mixins/MMarketBuyZrx.sol";
+import "./mixins/MExpectedResults.sol";
+import "./mixins/MTransfer.sol";
+import "./mixins/MConstants.sol";
+import "./mixins/MForwarderCore.sol";
 import "../protocol/Exchange/libs/LibOrder.sol";
+import "../protocol/Exchange/libs/LibFillResults.sol";
 
-contract MixinMarketBuyTokens is
-    MixinConstants,
-    MixinWethFees,
-    MixinMarketBuyZrx,
-    MixinExpectedResults,
-    MixinERC20,
-    MixinERC721
+
+contract MixinForwarderCore is
+    LibFillResults,
+    MConstants,
+    MExpectedResults,
+    MFees,
+    MMarketBuyZrx,
+    MTransfer,
+    MForwarderCore
 {
-    bytes4 public constant ERC20_DATA_ID = bytes4(keccak256("ERC20Token(address)"));
-    bytes4 public constant ERC721_DATA_ID = bytes4(keccak256("ERC721Token(address,uint256,bytes)"));
+    bytes4 constant internal ERC20_DATA_ID = bytes4(keccak256("ERC20Token(address)"));
+    bytes4 constant internal ERC721_DATA_ID = bytes4(keccak256("ERC721Token(address,uint256,bytes)"));
+    uint256 constant internal MAX_UINT = 2**256 - 1;
+
+    constructor ()
+        public
+    {
+        address proxyAddress = EXCHANGE.getAssetProxy(ERC20_DATA_ID);
+        if (proxyAddress != address(0)) {
+            ETHER_TOKEN.approve(proxyAddress, MAX_UINT);
+            ZRX_TOKEN.approve(proxyAddress, MAX_UINT);
+        }
+    }
+
+    /// @dev Market sells ETH for ERC20 tokens, performing fee abstraction if required. This does not support ERC721 tokens. This function is payable
+    ///      and will convert all incoming ETH into WETH and perform the trade on behalf of the caller.
+    ///      This function allows for a deduction of a proportion of incoming ETH sent to the feeRecipient.
+    ///      The caller is sent all tokens from the operation.
+    ///      If the purchased token amount does not meet an acceptable threshold then this function reverts.
+    /// @param orders An array of Order struct containing order specifications.
+    /// @param signatures An array of Proof that order has been created by maker.
+    /// @param feeOrders An array of Order struct containing order specifications for fees.
+    /// @param feeSignatures An array of Proof that order has been created by maker for the fee orders.
+    /// @param feeProportion A proportion deducted off the incoming ETH and sent to feeRecipient. The maximum value for this
+    ///        is 1000, aka 10%. Supports up to 2 decimal places. I.e 0.59% is 59.
+    /// @param feeRecipient An address of the fee recipient whom receives feeProportion of ETH.
+    /// @return FillResults amounts filled and fees paid by maker and taker.
+    function marketSellEthForERC20(
+        LibOrder.Order[] memory orders,
+        bytes[] memory signatures,
+        LibOrder.Order[] memory feeOrders,
+        bytes[] memory feeSignatures,
+        uint16  feeProportion,
+        address feeRecipient
+    )
+        public
+        payable
+        returns (FillResults memory totalFillResults)
+    {
+        uint256 takerEthAmount = msg.value;
+        require(
+            takerEthAmount > 0,
+            "VALUE_GREATER_THAN_ZERO"
+        );
+        // Deduct the fee from the total amount of ETH sent in
+        uint256 ethFeeAmount = payEthFee(
+            takerEthAmount,
+            feeProportion,
+            feeRecipient
+        );
+        uint256 wethSellAmount = safeSub(takerEthAmount, ethFeeAmount);
+
+        // Deposit the remaining to be used for trading
+        ETHER_TOKEN.deposit.value(wethSellAmount)();
+        // Populate the known assetData, as it is always WETH the caller can provide null bytes to save gas
+        // marketSellOrders fills the remaining
+        address makerTokenAddress = LibBytes.readAddress(orders[0].makerAssetData, 16);
+        orders[0].takerAssetData = WETH_ASSET_DATA;
+        if (makerTokenAddress == address(ZRX_TOKEN)) {
+            // If this is ZRX then we market sell from the orders, rather than a 2 step of buying ZRX fees from feeOrders
+            // then buying ZRX from orders
+            totalFillResults = marketSellEthForZRXInternal(
+                orders,
+                signatures,
+                wethSellAmount
+            );
+        } else {
+            totalFillResults = marketSellEthForERC20Internal(
+                orders,
+                signatures,
+                feeOrders,
+                feeSignatures,
+                wethSellAmount
+            );
+        }
+        // Prevent accidental WETH owned by this contract and it being spent
+        require(
+            takerEthAmount >= totalFillResults.takerAssetFilledAmount,
+            "INVALID_MSG_VALUE"
+        );
+        // Ensure no WETH is left in this contract
+        require(
+            wethSellAmount == totalFillResults.takerAssetFilledAmount,
+            "UNACCEPTABLE_THRESHOLD"
+        );
+        // Transfer all tokens to msg.sender
+        transferERC20Token(
+            makerTokenAddress,
+            msg.sender,
+            totalFillResults.makerAssetFilledAmount
+        );
+        return totalFillResults;
+    }
 
     /// @dev Buys the exact amount of assets (ERC20 and ERC721), performing fee abstraction if required.
     ///      All order assets must be of the same type. Deducts a proportional fee to fee recipient.
@@ -62,8 +156,8 @@ contract MixinMarketBuyTokens is
         uint16  feeProportion,
         address feeRecipient
     )
-        payable
         public
+        payable
         returns (FillResults memory totalFillResults)
     {
         uint256 takerEthAmount = msg.value;
@@ -112,6 +206,85 @@ contract MixinMarketBuyTokens is
         return totalFillResults;
     }
 
+    /// @dev Market sells WETH for ERC20 tokens.
+    /// @param orders An array of Order struct containing order specifications.
+    /// @param signatures An array of Proof that order has been created by maker.
+    /// @param feeOrders An array of Order struct containing order specifications for fees.
+    /// @param feeSignatures An array of Proof that order has been created by maker for the fee orders.
+    /// @param wethSellAmount The amount of WETH to sell.
+    /// @return FillResults amounts filled and fees paid by maker and taker.
+    function marketSellEthForERC20Internal(
+        LibOrder.Order[] memory orders,
+        bytes[] memory signatures,
+        LibOrder.Order[] memory feeOrders,
+        bytes[] memory feeSignatures,
+        uint256 wethSellAmount
+    )
+        internal
+        returns (FillResults memory totalFillResults)
+    {
+        uint256 remainingWethSellAmount = wethSellAmount;
+        FillResults memory calculatedMarketSellResults = calculateMarketSellResults(orders, wethSellAmount);
+        if (calculatedMarketSellResults.takerFeePaid > 0) {
+            // Fees are required for these orders. Buy enough ZRX to cover the future market buy
+            FillResults memory feeTokensResults = marketBuyZrxInternal(
+                feeOrders,
+                feeSignatures,
+                calculatedMarketSellResults.takerFeePaid
+            );
+            // Ensure the token abstraction was fair if fees were proportionally too high, we fail
+            require(
+                isAcceptableThreshold(
+                    wethSellAmount,
+                    safeSub(wethSellAmount, feeTokensResults.takerAssetFilledAmount)
+                ),
+                "UNACCEPTABLE_THRESHOLD"
+            );
+            remainingWethSellAmount = safeSub(remainingWethSellAmount, feeTokensResults.takerAssetFilledAmount);
+            totalFillResults.takerFeePaid = feeTokensResults.takerFeePaid;
+            totalFillResults.takerAssetFilledAmount = feeTokensResults.takerAssetFilledAmount;
+        }
+        // Make our market sell to buy the requested tokens with the remaining balance
+        FillResults memory requestedTokensResults = EXCHANGE.marketSellOrders(
+            orders,
+            remainingWethSellAmount,
+            signatures
+        );
+        // Update our return FillResult with the market sell
+        addFillResults(totalFillResults, requestedTokensResults);
+        return totalFillResults;
+    }
+
+    /// @dev Market sells WETH for ZRX tokens.
+    /// @param orders An array of Order struct containing order specifications.
+    /// @param signatures An array of Proof that order has been created by maker.
+    /// @param wethSellAmount The amount of WETH to sell.
+    /// @return FillResults amounts filled and fees paid by maker and taker.
+    function marketSellEthForZRXInternal(
+        LibOrder.Order[] memory orders,
+        bytes[] memory signatures,
+        uint256 wethSellAmount
+    )
+        internal
+        returns (FillResults memory totalFillResults)
+    {
+        // Make our market sell to buy the requested tokens with the remaining balance
+        totalFillResults = EXCHANGE.marketSellOrders(
+            orders,
+            wethSellAmount,
+            signatures
+        );
+        // Exchange does not special case ZRX in the makerAssetFilledAmount, if fees were deducted then using this amount
+        // for future transfers is invalid.
+        uint256 zrxAmountBought = safeSub(totalFillResults.makerAssetFilledAmount, totalFillResults.takerFeePaid);
+        require(
+            isAcceptableThreshold(totalFillResults.makerAssetFilledAmount, zrxAmountBought),
+            "UNACCEPTABLE_THRESHOLD"
+        );
+        totalFillResults.makerAssetFilledAmount = zrxAmountBought;
+        return totalFillResults;
+    }
+
     /// @dev Buys an exact amount of an ERC20 token using WETH.
     /// @param orders Orders to fill. The maker asset is the ERC20 token to buy. The taker asset is WETH.
     /// @param signatures Proof that the orders were created by their respective makers.
@@ -126,8 +299,8 @@ contract MixinMarketBuyTokens is
         bytes[] memory feeSignatures,
         uint256 makerTokenFillAmount
     )
-        private
-        returns (FillResults memory totalFillResults)
+        internal
+        returns (LibFillResults.FillResults memory totalFillResults)
     {
         // We read the maker token address to check if it is ZRX and later use it for transfer
         address makerTokenAddress = LibBytes.readAddress(orders[0].makerAssetData, 16);
@@ -188,7 +361,7 @@ contract MixinMarketBuyTokens is
             );
         }
         // Transfer all purchased tokens to msg.sender
-        transferToken(
+        transferERC20Token(
             makerTokenAddress,
             msg.sender,
             marketBuyResults.makerAssetFilledAmount
@@ -208,8 +381,8 @@ contract MixinMarketBuyTokens is
         LibOrder.Order[] memory feeOrders,
         bytes[] memory feeSignatures
     )
-        private
-        returns (FillResults memory totalFillResults)
+        internal
+        returns (LibFillResults.FillResults memory totalFillResults)
     {
         uint256 totalZrxFeeAmount;
         uint256 ordersLength = orders.length;
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinMarketBuyZrx.sol b/packages/contracts/src/2.0.0/forwarder/MixinMarketBuyZrx.sol
index 4dbb34de3..e272f8aad 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinMarketBuyZrx.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinMarketBuyZrx.sol
@@ -16,20 +16,23 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
-import "../protocol/Exchange/Exchange.sol";
 import "../protocol/Exchange/libs/LibFillResults.sol";
 import "../protocol/Exchange/libs/LibOrder.sol";
 import "../protocol/Exchange/libs/LibMath.sol";
-import "./MixinConstants.sol";
+import "./mixins/MConstants.sol";
+import "./mixins/MMarketBuyZrx.sol";
+
 
 contract MixinMarketBuyZrx is
     LibMath,
     LibFillResults,
-    MixinConstants
+    MConstants,
+    MMarketBuyZrx
 {
+
     /// @dev Buys zrxBuyAmount of ZRX fee tokens, taking into account the fees on buying fee tokens. This will guarantee
     ///      At least zrxBuyAmount of ZRX fee tokens are purchased (sometimes slightly over due to rounding issues).
     ///      It is possible that a request to buy 200 ZRX fee tokens will require purchasing 202 ZRX tokens
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinMarketSellTokens.sol b/packages/contracts/src/2.0.0/forwarder/MixinMarketSellTokens.sol
deleted file mode 100644
index 8c9cdb8d5..000000000
--- a/packages/contracts/src/2.0.0/forwarder/MixinMarketSellTokens.sol
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
-
-import "../protocol/Exchange/libs/LibOrder.sol";
-import "../utils/LibBytes/LibBytes.sol";
-import "./MixinWethFees.sol";
-import "./MixinExpectedResults.sol";
-import "./MixinERC20.sol";
-import "./MixinConstants.sol";
-import "./MixinMarketBuyZrx.sol";
-
-contract MixinMarketSellTokens is
-    MixinConstants,
-    MixinWethFees,
-    MixinMarketBuyZrx,
-    MixinExpectedResults,
-    MixinERC20
-{
-    /// @dev Market sells ETH for ERC20 tokens, performing fee abstraction if required. This does not support ERC721 tokens. This function is payable
-    ///      and will convert all incoming ETH into WETH and perform the trade on behalf of the caller.
-    ///      This function allows for a deduction of a proportion of incoming ETH sent to the feeRecipient.
-    ///      The caller is sent all tokens from the operation.
-    ///      If the purchased token amount does not meet an acceptable threshold then this function reverts.
-    /// @param orders An array of Order struct containing order specifications.
-    /// @param signatures An array of Proof that order has been created by maker.
-    /// @param feeOrders An array of Order struct containing order specifications for fees.
-    /// @param feeSignatures An array of Proof that order has been created by maker for the fee orders.
-    /// @param feeProportion A proportion deducted off the incoming ETH and sent to feeRecipient. The maximum value for this
-    ///        is 1000, aka 10%. Supports up to 2 decimal places. I.e 0.59% is 59.
-    /// @param feeRecipient An address of the fee recipient whom receives feeProportion of ETH.
-    /// @return FillResults amounts filled and fees paid by maker and taker.
-    function marketSellEthForERC20(
-        LibOrder.Order[] memory orders,
-        bytes[] memory signatures,
-        LibOrder.Order[] memory feeOrders,
-        bytes[] memory feeSignatures,
-        uint16  feeProportion,
-        address feeRecipient
-    )
-        payable
-        public
-        returns (FillResults memory totalFillResults)
-    {
-        uint256 takerEthAmount = msg.value;
-        require(
-            takerEthAmount > 0,
-            "VALUE_GREATER_THAN_ZERO"
-        );
-        // Deduct the fee from the total amount of ETH sent in
-        uint256 ethFeeAmount = payEthFee(
-            takerEthAmount,
-            feeProportion,
-            feeRecipient
-        );
-        uint256 wethSellAmount = safeSub(takerEthAmount, ethFeeAmount);
-
-        // Deposit the remaining to be used for trading
-        ETHER_TOKEN.deposit.value(wethSellAmount)();
-        // Populate the known assetData, as it is always WETH the caller can provide null bytes to save gas
-        // marketSellOrders fills the remaining
-        address makerTokenAddress = LibBytes.readAddress(orders[0].makerAssetData, 16);
-        orders[0].takerAssetData = WETH_ASSET_DATA;
-        if (makerTokenAddress == address(ZRX_TOKEN)) {
-            // If this is ZRX then we market sell from the orders, rather than a 2 step of buying ZRX fees from feeOrders
-            // then buying ZRX from orders
-            totalFillResults = marketSellEthForZRXInternal(
-                orders,
-                signatures,
-                wethSellAmount
-            );
-        } else {
-            totalFillResults = marketSellEthForERC20Internal(
-                orders,
-                signatures,
-                feeOrders,
-                feeSignatures,
-                wethSellAmount
-            );
-        }
-        // Prevent accidental WETH owned by this contract and it being spent
-        require(
-            takerEthAmount >= totalFillResults.takerAssetFilledAmount,
-            "INVALID_MSG_VALUE"
-        );
-        // Ensure no WETH is left in this contract
-        require(
-            wethSellAmount == totalFillResults.takerAssetFilledAmount,
-            "UNACCEPTABLE_THRESHOLD"
-        );
-        // Transfer all tokens to msg.sender
-        transferToken(
-            makerTokenAddress,
-            msg.sender,
-            totalFillResults.makerAssetFilledAmount
-        );
-        return totalFillResults;
-    }
-
-    /// @dev Market sells WETH for ERC20 tokens.
-    /// @param orders An array of Order struct containing order specifications.
-    /// @param signatures An array of Proof that order has been created by maker.
-    /// @param feeOrders An array of Order struct containing order specifications for fees.
-    /// @param feeSignatures An array of Proof that order has been created by maker for the fee orders.
-    /// @param wethSellAmount The amount of WETH to sell.
-    /// @return FillResults amounts filled and fees paid by maker and taker.
-    function marketSellEthForERC20Internal(
-        LibOrder.Order[] memory orders,
-        bytes[] memory signatures,
-        LibOrder.Order[] memory feeOrders,
-        bytes[] memory feeSignatures,
-        uint256 wethSellAmount
-    )
-        internal
-        returns (FillResults memory totalFillResults)
-    {
-        uint256 remainingWethSellAmount = wethSellAmount;
-        FillResults memory calculatedMarketSellResults = calculateMarketSellResults(orders, wethSellAmount);
-        if (calculatedMarketSellResults.takerFeePaid > 0) {
-            // Fees are required for these orders. Buy enough ZRX to cover the future market buy
-            FillResults memory feeTokensResults = marketBuyZrxInternal(
-                feeOrders,
-                feeSignatures,
-                calculatedMarketSellResults.takerFeePaid
-            );
-            // Ensure the token abstraction was fair if fees were proportionally too high, we fail
-            require(
-                isAcceptableThreshold(
-                    wethSellAmount,
-                    safeSub(wethSellAmount, feeTokensResults.takerAssetFilledAmount)
-                ),
-                "UNACCEPTABLE_THRESHOLD"
-            );
-            remainingWethSellAmount = safeSub(remainingWethSellAmount, feeTokensResults.takerAssetFilledAmount);
-            totalFillResults.takerFeePaid = feeTokensResults.takerFeePaid;
-            totalFillResults.takerAssetFilledAmount = feeTokensResults.takerAssetFilledAmount;
-        }
-        // Make our market sell to buy the requested tokens with the remaining balance
-        FillResults memory requestedTokensResults = EXCHANGE.marketSellOrders(
-            orders,
-            remainingWethSellAmount,
-            signatures
-        );
-        // Update our return FillResult with the market sell
-        addFillResults(totalFillResults, requestedTokensResults);
-        return totalFillResults;
-    }
-
-    /// @dev Market sells WETH for ZRX tokens.
-    /// @param orders An array of Order struct containing order specifications.
-    /// @param signatures An array of Proof that order has been created by maker.
-    /// @param wethSellAmount The amount of WETH to sell.
-    /// @return FillResults amounts filled and fees paid by maker and taker.
-    function marketSellEthForZRXInternal(
-        LibOrder.Order[] memory orders,
-        bytes[] memory signatures,
-        uint256 wethSellAmount
-    )
-        internal
-        returns (FillResults memory totalFillResults)
-    {
-        // Make our market sell to buy the requested tokens with the remaining balance
-        totalFillResults = EXCHANGE.marketSellOrders(
-            orders,
-            wethSellAmount,
-            signatures
-        );
-        // Exchange does not special case ZRX in the makerAssetFilledAmount, if fees were deducted then using this amount
-        // for future transfers is invalid.
-        uint256 zrxAmountBought = safeSub(totalFillResults.makerAssetFilledAmount, totalFillResults.takerFeePaid);
-        require(
-            isAcceptableThreshold(totalFillResults.makerAssetFilledAmount, zrxAmountBought),
-            "UNACCEPTABLE_THRESHOLD"
-        );
-        totalFillResults.makerAssetFilledAmount = zrxAmountBought;
-        return totalFillResults;
-    }
-
-}
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinERC20.sol b/packages/contracts/src/2.0.0/forwarder/MixinTransfer.sol
index 53d4116d7..6c49330f2 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinERC20.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinTransfer.sol
@@ -16,15 +16,49 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
-contract MixinERC20 {
+import "../utils/LibBytes/LibBytes.sol";
+import "../tokens/ERC721Token/IERC721Token.sol";
+import "./mixins/MTransfer.sol";
 
-    string constant ERROR_TRANSFER_FAILED = "TRANSFER_FAILED";
-    bytes4 constant ERC20_TRANSFER_SELECTOR = bytes4(keccak256("transfer(address,uint256)"));
 
-    function transferToken(
+contract MixinTransfer is
+    MTransfer
+{
+
+    using LibBytes for bytes;
+
+    bytes4 constant internal ERC20_TRANSFER_SELECTOR = bytes4(keccak256("transfer(address,uint256)"));
+    bytes4 constant internal ERC721_RECEIVED = bytes4(keccak256("onERC721Received(address,uint256,bytes)"));
+    bytes4 constant internal ERC721_RECEIVED_OPERATOR = bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"));
+
+    function onERC721Received(
+        address,
+        uint256,
+        bytes memory
+    )
+        public
+        pure
+        returns(bytes4)
+    {
+        return ERC721_RECEIVED;
+    }
+
+    function onERC721Received(
+        address,
+        address,
+        uint256,
+        bytes memory
+    )
+        public
+        pure
+        returns(bytes4)
+    {
+        return ERC721_RECEIVED_OPERATOR;
+    }
+
+    function transferERC20Token(
         address token,
         address to,
         uint256 amount
@@ -65,4 +99,22 @@ contract MixinERC20 {
             "TRANSFER_FAILED"
         );
     }
+
+    function transferERC721Token(
+        bytes memory assetData,
+        address to
+    )
+        internal
+    {
+        // Decode asset data.
+        address token = assetData.readAddress(16);
+        uint256 tokenId = assetData.readUint256(36);
+        bytes memory receiverData = assetData.readBytesWithLength(100);
+        IERC721Token(token).safeTransferFrom(
+            address(this),
+            to,
+            tokenId,
+            receiverData
+        );
+    }
 }
diff --git a/packages/contracts/src/2.0.0/forwarder/interfaces/IExpectedResults.sol b/packages/contracts/src/2.0.0/forwarder/interfaces/IExpectedResults.sol
new file mode 100644
index 000000000..89187b750
--- /dev/null
+++ b/packages/contracts/src/2.0.0/forwarder/interfaces/IExpectedResults.sol
@@ -0,0 +1,66 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity 0.4.24;
+pragma experimental ABIEncoderV2;
+
+import "../../protocol/Exchange/libs/LibFillResults.sol";
+import "../../protocol/Exchange/libs/LibOrder.sol";
+
+
+contract IExpectedResults {
+
+    /// @dev Calculates a total FillResults for buying makerAssetFillAmount over all orders.
+    ///      Including the fees required to be paid. 
+    /// @param orders An array of Order struct containing order specifications.
+    /// @param makerAssetFillAmount A number representing the amount of this order to fill.
+    /// @return totalFillResults Amounts filled and fees paid by maker and taker.
+    function calculateMarketBuyResults(
+        LibOrder.Order[] memory orders,
+        uint256 makerAssetFillAmount
+    )
+        public
+        view
+        returns (LibFillResults.FillResults memory totalFillResults);
+
+    /// @dev Calculates a FillResults total for selling takerAssetFillAmount over all orders. 
+    ///      Including the fees required to be paid. 
+    /// @param orders An array of Order struct containing order specifications.
+    /// @param takerAssetFillAmount A number representing the amount of this order to fill.
+    /// @return totalFillResults Amounts filled and fees paid by maker and taker.
+    function calculateMarketSellResults(
+        LibOrder.Order[] memory orders,
+        uint256 takerAssetFillAmount
+    )
+        public
+        view
+        returns (LibFillResults.FillResults memory totalFillResults);
+
+    /// @dev Calculates fill results for buyFeeTokens. This handles fees on buying ZRX
+    ///      so the end result is the expected amount of ZRX (not less after fees).
+    /// @param orders An array of Order struct containing order specifications.
+    /// @param zrxFillAmount A number representing the amount zrx to buy
+    /// @return totalFillResults Expected fill result amounts from buying fees
+    function calculateMarketBuyZrxResults(
+        LibOrder.Order[] memory orders,
+        uint256 zrxFillAmount
+    )
+        public
+        view
+        returns (LibFillResults.FillResults memory totalFillResults);
+}
diff --git a/packages/contracts/src/2.0.0/forwarder/interfaces/IForwarder.sol b/packages/contracts/src/2.0.0/forwarder/interfaces/IForwarder.sol
new file mode 100644
index 000000000..745dd29a9
--- /dev/null
+++ b/packages/contracts/src/2.0.0/forwarder/interfaces/IForwarder.sol
@@ -0,0 +1,30 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity 0.4.24;
+pragma experimental ABIEncoderV2;
+
+import "./IForwarderCore.sol";
+import "./IExpectedResults.sol";
+
+
+// solhint-disable no-empty-blocks
+contract IForwarder is
+    IForwarderCore,
+    IExpectedResults
+{}
diff --git a/packages/contracts/src/2.0.0/forwarder/interfaces/IForwarderCore.sol b/packages/contracts/src/2.0.0/forwarder/interfaces/IForwarderCore.sol
new file mode 100644
index 000000000..7ac2a8af3
--- /dev/null
+++ b/packages/contracts/src/2.0.0/forwarder/interfaces/IForwarderCore.sol
@@ -0,0 +1,79 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity 0.4.24;
+pragma experimental ABIEncoderV2;
+
+import "../../protocol/Exchange/libs/LibOrder.sol";
+import "../../protocol/Exchange/libs/LibFillResults.sol";
+
+
+contract IForwarderCore {
+
+    /// @dev Market sells ETH for ERC20 tokens, performing fee abstraction if required. This does not support ERC721 tokens. This function is payable
+    ///      and will convert all incoming ETH into WETH and perform the trade on behalf of the caller.
+    ///      This function allows for a deduction of a proportion of incoming ETH sent to the feeRecipient.
+    ///      The caller is sent all tokens from the operation.
+    ///      If the purchased token amount does not meet an acceptable threshold then this function reverts.
+    /// @param orders An array of Order struct containing order specifications.
+    /// @param signatures An array of Proof that order has been created by maker.
+    /// @param feeOrders An array of Order struct containing order specifications for fees.
+    /// @param feeSignatures An array of Proof that order has been created by maker for the fee orders.
+    /// @param feeProportion A proportion deducted off the incoming ETH and sent to feeRecipient. The maximum value for this
+    ///        is 1000, aka 10%. Supports up to 2 decimal places. I.e 0.59% is 59.
+    /// @param feeRecipient An address of the fee recipient whom receives feeProportion of ETH.
+    /// @return FillResults amounts filled and fees paid by maker and taker.
+    function marketSellEthForERC20(
+        LibOrder.Order[] memory orders,
+        bytes[] memory signatures,
+        LibOrder.Order[] memory feeOrders,
+        bytes[] memory feeSignatures,
+        uint16  feeProportion,
+        address feeRecipient
+    )
+        public
+        payable
+        returns (LibFillResults.FillResults memory totalFillResults);
+
+    /// @dev Buys the exact amount of assets (ERC20 and ERC721), performing fee abstraction if required.
+    ///      All order assets must be of the same type. Deducts a proportional fee to fee recipient.
+    ///      This function is payable and will convert all incoming ETH into WETH and perform the trade on behalf of the caller.
+    ///      The caller is sent all assets from the fill of orders. This function will revert unless the requested amount of assets are purchased.
+    ///      Any excess ETH sent will be returned to the caller
+    /// @param orders An array of Order struct containing order specifications.
+    /// @param signatures An array of Proof that order has been created by maker.
+    /// @param feeOrders An array of Order struct containing order specifications for fees.
+    /// @param makerTokenFillAmount The amount of maker asset to buy.
+    /// @param feeSignatures An array of Proof that order has been created by maker for the fee orders.
+    /// @param feeProportion A proportion deducted off the ETH spent and sent to feeRecipient. The maximum value for this
+    ///        is 1000, aka 10%. Supports up to 2 decimal places. I.e 0.59% is 59.
+    /// @param feeRecipient An address of the fee recipient whom receives feeProportion of ETH.
+    /// @return FillResults amounts filled and fees paid by maker and taker.
+    function marketBuyTokensWithEth(
+        LibOrder.Order[] memory orders,
+        bytes[] memory signatures,
+        LibOrder.Order[] memory feeOrders,
+        bytes[] memory feeSignatures,
+        uint256 makerTokenFillAmount,
+        uint16  feeProportion,
+        address feeRecipient
+    )
+        public
+        payable
+        returns (LibFillResults.FillResults memory totalFillResults);
+}
diff --git a/packages/contracts/src/2.0.0/forwarder/mixins/MConstants.sol b/packages/contracts/src/2.0.0/forwarder/mixins/MConstants.sol
new file mode 100644
index 000000000..348bf169e
--- /dev/null
+++ b/packages/contracts/src/2.0.0/forwarder/mixins/MConstants.sol
@@ -0,0 +1,35 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity 0.4.24;
+
+import "../../protocol/Exchange/interfaces/IExchange.sol";
+import "../../tokens/EtherToken/IEtherToken.sol";
+import "../../tokens/ERC20Token/IERC20Token.sol";
+
+
+contract MConstants {
+
+    // solhint-disable var-name-mixedcase
+    IExchange internal EXCHANGE;
+    IEtherToken internal ETHER_TOKEN;
+    IERC20Token internal ZRX_TOKEN;
+    bytes internal ZRX_ASSET_DATA;
+    bytes internal WETH_ASSET_DATA;
+    // solhint-enable var-name-mixedcase
+}
diff --git a/packages/contracts/src/2.0.0/forwarder/mixins/MExpectedResults.sol b/packages/contracts/src/2.0.0/forwarder/mixins/MExpectedResults.sol
new file mode 100644
index 000000000..cf03bb32e
--- /dev/null
+++ b/packages/contracts/src/2.0.0/forwarder/mixins/MExpectedResults.sol
@@ -0,0 +1,42 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity 0.4.24;
+pragma experimental ABIEncoderV2;
+
+import "../../protocol/Exchange/libs/LibFillResults.sol";
+import "../../protocol/Exchange/libs/LibOrder.sol";
+import "../interfaces/IExpectedResults.sol";
+
+
+contract MExpectedResults is
+    IExpectedResults
+{
+
+    /// @dev Simulates the 0x Exchange fillOrder validation and calculations, without performing any state changes.
+    /// @param order An Order struct containing order specifications.
+    /// @param takerAssetFillAmount A number representing the amount of this order to fill.
+    /// @return fillResults Amounts filled and fees paid by maker and taker.
+    function calculateFillResults(
+        LibOrder.Order memory order,
+        uint256 takerAssetFillAmount
+    )
+        internal
+        view
+        returns (LibFillResults.FillResults memory fillResults);
+}
diff --git a/packages/contracts/src/2.0.0/forwarder/mixins/MFees.sol b/packages/contracts/src/2.0.0/forwarder/mixins/MFees.sol
new file mode 100644
index 000000000..f332637ea
--- /dev/null
+++ b/packages/contracts/src/2.0.0/forwarder/mixins/MFees.sol
@@ -0,0 +1,63 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity 0.4.24;
+
+
+contract MFees {
+
+    /// @dev Pays the feeRecipient feeProportion of the total takerEthAmount, denominated in ETH
+    /// @param takerEthAmount The total amount that was transacted in WETH, fees are calculated from this value.
+    /// @param feeProportion The proportion of fees
+    /// @param feeRecipient The recipient of the fees
+    /// @return ethFeeAmount Amount of ETH paid to feeRecipient as fee.
+    function payEthFee(
+        uint256 takerEthAmount,
+        uint16 feeProportion,
+        address feeRecipient
+    )
+        internal
+        returns (uint256 ethFeeAmount);
+
+    /// @dev Withdraws the remaining WETH, deduct and pay fees from this amount based on the takerTokenAmount to the feeRecipient.
+    ///      If a user overpaid ETH initially, the fees are calculated from the amount traded and deducted from withdrawAmount.
+    ///      Any remaining ETH is sent back to the user.
+    /// @param ethWithdrawAmount The amount to withdraw from the WETH contract.
+    /// @param wethAmountSold The total amount that was transacted in WETH, fees are calculated from this value.
+    /// @param feeProportion The proportion of fees
+    /// @param feeRecipient The recipient of the fees
+    function withdrawPayAndDeductEthFee(
+        uint256 ethWithdrawAmount,
+        uint256 wethAmountSold,
+        uint16 feeProportion,
+        address feeRecipient
+    )
+        internal;
+
+    /// @dev Checks whether the amount of tokens sold against the amount of tokens requested
+    ///      is within a certain threshold. This ensures the caller gets a fair deal when
+    ///      performing any token fee abstraction. Threshold is 95%. If fee abstraction costs more than
+    ///      5% of the total transaction, we return false.
+    /// @param requestedSellAmount The amount the user requested, or sent in to a payable function
+    /// @param tokenAmountSold The amount of the token that was sold after fee abstraction
+    /// @return bool of whether this is within an acceptable threshold
+    function isAcceptableThreshold(uint256 requestedSellAmount, uint256 tokenAmountSold)
+        internal
+        pure
+        returns (bool);
+}
diff --git a/packages/contracts/src/2.0.0/forwarder/mixins/MForwarderCore.sol b/packages/contracts/src/2.0.0/forwarder/mixins/MForwarderCore.sol
new file mode 100644
index 000000000..4a54e76b1
--- /dev/null
+++ b/packages/contracts/src/2.0.0/forwarder/mixins/MForwarderCore.sol
@@ -0,0 +1,92 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity 0.4.24;
+pragma experimental ABIEncoderV2;
+
+import "../../protocol/Exchange/libs/LibOrder.sol";
+import "../../protocol/Exchange/libs/LibFillResults.sol";
+import "../interfaces/IForwarderCore.sol";
+
+
+contract MForwarderCore is
+    IForwarderCore
+{
+
+    /// @dev Market sells WETH for ERC20 tokens.
+    /// @param orders An array of Order struct containing order specifications.
+    /// @param signatures An array of Proof that order has been created by maker.
+    /// @param feeOrders An array of Order struct containing order specifications for fees.
+    /// @param feeSignatures An array of Proof that order has been created by maker for the fee orders.
+    /// @param wethSellAmount The amount of WETH to sell.
+    /// @return FillResults amounts filled and fees paid by maker and taker.
+    function marketSellEthForERC20Internal(
+        LibOrder.Order[] memory orders,
+        bytes[] memory signatures,
+        LibOrder.Order[] memory feeOrders,
+        bytes[] memory feeSignatures,
+        uint256 wethSellAmount
+    )
+        internal
+        returns (LibFillResults.FillResults memory totalFillResults);
+
+    /// @dev Market sells WETH for ZRX tokens.
+    /// @param orders An array of Order struct containing order specifications.
+    /// @param signatures An array of Proof that order has been created by maker.
+    /// @param wethSellAmount The amount of WETH to sell.
+    /// @return FillResults amounts filled and fees paid by maker and taker.
+    function marketSellEthForZRXInternal(
+        LibOrder.Order[] memory orders,
+        bytes[] memory signatures,
+        uint256 wethSellAmount
+    )
+        internal
+        returns (LibFillResults.FillResults memory totalFillResults);
+
+    /// @dev Buys an exact amount of an ERC20 token using WETH.
+    /// @param orders Orders to fill. The maker asset is the ERC20 token to buy. The taker asset is WETH.
+    /// @param signatures Proof that the orders were created by their respective makers.
+    /// @param feeOrders to fill. The maker asset is ZRX and the taker asset is WETH.
+    /// @param feeSignatures Proof that the feeOrders were created by their respective makers.
+    /// @param makerTokenFillAmount Amount of the ERC20 token to buy.
+    /// @return totalFillResults Aggregated fill results of buying the ERC20 and ZRX tokens.
+    function marketBuyERC20TokensInternal(
+        LibOrder.Order[] memory orders,
+        bytes[] memory signatures,
+        LibOrder.Order[] memory feeOrders,
+        bytes[] memory feeSignatures,
+        uint256 makerTokenFillAmount
+    )
+        internal
+        returns (LibFillResults.FillResults memory totalFillResults);
+
+    /// @dev Buys an all of the ERC721 tokens in the orders.
+    /// @param orders Orders to fill. The maker asset is the ERC721 token to buy. The taker asset is WETH.
+    /// @param signatures Proof that the orders were created by their respective makers.
+    /// @param feeOrders to fill. The maker asset is ZRX and the taker asset is WETH.
+    /// @param feeSignatures Proof that the feeOrders were created by their respective makers.
+    /// @return totalFillResults Aggregated fill results of buying the ERC721 tokens and ZRX tokens.
+    function batchBuyERC721TokensInternal(
+        LibOrder.Order[] memory orders,
+        bytes[] memory signatures,
+        LibOrder.Order[] memory feeOrders,
+        bytes[] memory feeSignatures
+    )
+        internal
+        returns (LibFillResults.FillResults memory totalFillResults);
+}
diff --git a/packages/contracts/src/2.0.0/forwarder/mixins/MMarketBuyZrx.sol b/packages/contracts/src/2.0.0/forwarder/mixins/MMarketBuyZrx.sol
new file mode 100644
index 000000000..3501ef001
--- /dev/null
+++ b/packages/contracts/src/2.0.0/forwarder/mixins/MMarketBuyZrx.sol
@@ -0,0 +1,42 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity 0.4.24;
+
+import "../../protocol/Exchange/libs/LibFillResults.sol";
+import "../../protocol/Exchange/libs/LibOrder.sol";
+
+
+contract MMarketBuyZrx {
+
+    /// @dev Buys zrxBuyAmount of ZRX fee tokens, taking into account the fees on buying fee tokens. This will guarantee
+    ///      At least zrxBuyAmount of ZRX fee tokens are purchased (sometimes slightly over due to rounding issues).
+    ///      It is possible that a request to buy 200 ZRX fee tokens will require purchasing 202 ZRX tokens
+    ///      As 2 ZRX is required to purchase the 200 ZRX fee tokens. This guarantees at least 200 ZRX for future purchases.
+    /// @param orders An array of Order struct containing order specifications for fees.
+    /// @param signatures An array of Proof that order has been created by maker for the fee orders.
+    /// @param zrxBuyAmount The number of requested ZRX fee tokens.
+    /// @return totalFillResults Amounts filled and fees paid by maker and taker. makerTokenAmount is the zrx amount deducted of fees
+    function marketBuyZrxInternal(
+        LibOrder.Order[] memory orders,
+        bytes[] memory signatures,
+        uint256 zrxBuyAmount
+    )
+        internal
+        returns (LibFillResults.FillResults memory totalFillResults);
+}
diff --git a/packages/contracts/src/2.0.0/forwarder/mixins/MTransfer.sol b/packages/contracts/src/2.0.0/forwarder/mixins/MTransfer.sol
new file mode 100644
index 000000000..418a6288b
--- /dev/null
+++ b/packages/contracts/src/2.0.0/forwarder/mixins/MTransfer.sol
@@ -0,0 +1,46 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity 0.4.24;
+
+
+contract MTransfer {
+
+    function onERC721Received(address, uint256, bytes memory)
+        public
+        pure
+        returns(bytes4);
+
+    function onERC721Received(address, address, uint256, bytes memory)
+        public
+        pure
+        returns(bytes4);
+    
+    function transferERC20Token(
+        address token,
+        address to,
+        uint256 amount
+    )
+        internal;
+
+    function transferERC721Token(
+        bytes memory assetData,
+        address to
+    )
+        internal;
+}
diff --git a/packages/contracts/src/2.0.0/multisig/MultiSigWallet.sol b/packages/contracts/src/2.0.0/multisig/MultiSigWallet.sol
index 1ceecd907..eb54fe047 100644
--- a/packages/contracts/src/2.0.0/multisig/MultiSigWallet.sol
+++ b/packages/contracts/src/2.0.0/multisig/MultiSigWallet.sol
@@ -1,6 +1,6 @@
+// solhint-disable
 pragma solidity ^0.4.10;
 
-// solhint-disable
 
 /// @title Multisignature wallet - Allows multiple parties to agree on transactions before execution.
 /// @author Stefan George - <stefan.george@consensys.net>
diff --git a/packages/contracts/src/2.0.0/multisig/MultiSigWalletWithTimeLock.sol b/packages/contracts/src/2.0.0/multisig/MultiSigWalletWithTimeLock.sol
index d714b661d..8c5e6e1e6 100644
--- a/packages/contracts/src/2.0.0/multisig/MultiSigWalletWithTimeLock.sol
+++ b/packages/contracts/src/2.0.0/multisig/MultiSigWalletWithTimeLock.sol
@@ -16,11 +16,11 @@
 
 */
 
+// solhint-disable
 pragma solidity ^0.4.10;
 
 import "./MultiSigWallet.sol";
 
-// solhint-disable
 
 /// @title Multisignature wallet with time lock- Allows multiple parties to execute a transaction after a time lock has passed.
 /// @author Amir Bandeali - <amir@0xProject.com>
diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC20Proxy.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC20Proxy.sol
index aed62f54f..b5cec6b64 100644
--- a/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC20Proxy.sol
+++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC20Proxy.sol
@@ -16,18 +16,19 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "../../utils/LibBytes/LibBytes.sol";
 import "./MixinAuthorizable.sol";
 
+
 contract ERC20Proxy is
     MixinAuthorizable
 {
     // Id of this proxy.
-    bytes4 constant PROXY_ID = bytes4(keccak256("ERC20Token(address)"));
+    bytes4 constant internal PROXY_ID = bytes4(keccak256("ERC20Token(address)"));
     
+    // solhint-disable-next-line payable-fallback
     function () 
         external
     {
diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC721Proxy.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC721Proxy.sol
index b73dc36cc..1f9958b43 100644
--- a/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC721Proxy.sol
+++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/ERC721Proxy.sol
@@ -16,18 +16,19 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "../../utils/LibBytes/LibBytes.sol";
 import "./MixinAuthorizable.sol";
 
+
 contract ERC721Proxy is
     MixinAuthorizable
 {
     // Id of this proxy.
-    bytes4 constant PROXY_ID = bytes4(keccak256("ERC721Token(address,uint256,bytes)"));
+    bytes4 constant internal PROXY_ID = bytes4(keccak256("ERC721Token(address,uint256,bytes)"));
 
+    // solhint-disable-next-line payable-fallback
     function () 
         external
     {
diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/MixinAuthorizable.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/MixinAuthorizable.sol
index 5bc5f3a47..ff4660a31 100644
--- a/packages/contracts/src/2.0.0/protocol/AssetProxy/MixinAuthorizable.sol
+++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/MixinAuthorizable.sol
@@ -16,8 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "../../utils/Ownable/Ownable.sol";
 import "./mixins/MAuthorizable.sol";
diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetData.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetData.sol
index b4ff2d900..3e76e38dd 100644
--- a/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetData.sol
+++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetData.sol
@@ -16,7 +16,8 @@
 
 */
 
-pragma solidity ^0.4.23;
+// solhint-disable
+pragma solidity 0.4.24;
 
 
 // @dev Interface of the asset proxy's assetData.
@@ -24,12 +25,10 @@ pragma solidity ^0.4.23;
 // This argument is ABI encoded as one of the methods of this interface.
 interface IAssetData {
 
-    // solhint-disable-next-line func-name-mixedcase
     function ERC20Token(address tokenContract)
         external
         pure;
     
-    // solhint-disable-next-line func-name-mixedcase
     function ERC721Token(
         address tokenContract,
         uint256 tokenId,
diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetProxy.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetProxy.sol
index 0ef1ed2e0..3651dd694 100644
--- a/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetProxy.sol
+++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetProxy.sol
@@ -16,8 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "./IAuthorizable.sol";
 
diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAuthorizable.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAuthorizable.sol
index 286db74aa..8fac43a47 100644
--- a/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAuthorizable.sol
+++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAuthorizable.sol
@@ -16,8 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "../../../utils/Ownable/IOwnable.sol";
 
@@ -26,13 +25,6 @@ contract IAuthorizable is
     IOwnable
 {
 
-    /// @dev Gets all authorized addresses.
-    /// @return Array of authorized addresses.
-    function getAuthorizedAddresses()
-        external
-        view
-        returns (address[]);
-
     /// @dev Authorizes an address.
     /// @param target Address to authorize.
     function addAuthorizedAddress(address target)
@@ -51,4 +43,11 @@ contract IAuthorizable is
         uint256 index
     )
         external;
+    
+    /// @dev Gets all authorized addresses.
+    /// @return Array of authorized addresses.
+    function getAuthorizedAddresses()
+        external
+        view
+        returns (address[] memory);
 }
diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/libs/LibAssetProxyErrors.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/libs/LibAssetProxyErrors.sol
index 4b460ea9a..1d9a70cc1 100644
--- a/packages/contracts/src/2.0.0/protocol/AssetProxy/libs/LibAssetProxyErrors.sol
+++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/libs/LibAssetProxyErrors.sol
@@ -16,7 +16,8 @@
 
 */
 
-pragma solidity ^0.4.24;
+// solhint-disable
+pragma solidity 0.4.24;
 
 
 /// @dev This contract documents the revert reasons used in the AssetProxy contracts.
diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxy/mixins/MAuthorizable.sol b/packages/contracts/src/2.0.0/protocol/AssetProxy/mixins/MAuthorizable.sol
index 66c259a23..8afc8c8d8 100644
--- a/packages/contracts/src/2.0.0/protocol/AssetProxy/mixins/MAuthorizable.sol
+++ b/packages/contracts/src/2.0.0/protocol/AssetProxy/mixins/MAuthorizable.sol
@@ -16,8 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "../interfaces/IAuthorizable.sol";
 
diff --git a/packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol b/packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol
index 232155a6b..e7cf4ab5c 100644
--- a/packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol
+++ b/packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol
@@ -33,7 +33,7 @@ contract AssetProxyOwner is
     // if this contract is allowed to call the AssetProxy's `removeAuthorizedAddressAtIndex` method without a time lock.
     mapping (address => bool) public isAssetProxyRegistered;
 
-    bytes4 constant REMOVE_AUTHORIZED_ADDRESS_AT_INDEX_SELECTOR = bytes4(keccak256("removeAuthorizedAddressAtIndex(address,uint256)"));
+    bytes4 constant internal REMOVE_AUTHORIZED_ADDRESS_AT_INDEX_SELECTOR = bytes4(keccak256("removeAuthorizedAddressAtIndex(address,uint256)"));
 
     /// @dev Function will revert if the transaction does not call `removeAuthorizedAddressAtIndex`
     ///      on an approved AssetProxy contract.
@@ -89,6 +89,7 @@ contract AssetProxyOwner is
     {
         Transaction storage tx = transactions[transactionId];
         tx.executed = true;
+        // solhint-disable-next-line avoid-call-value
         if (tx.destination.call.value(tx.value)(tx.data))
             Execution(transactionId);
         else {
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/Exchange.sol b/packages/contracts/src/2.0.0/protocol/Exchange/Exchange.sol
index effff82e0..7507d3da1 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/Exchange.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/Exchange.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "./libs/LibConstants.sol";
@@ -28,6 +28,7 @@ import "./MixinTransactions.sol";
 import "./MixinMatchOrders.sol";
 
 
+// solhint-disable no-empty-blocks
 contract Exchange is
     MixinExchangeCore,
     MixinMatchOrders,
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/MixinAssetProxyDispatcher.sol b/packages/contracts/src/2.0.0/protocol/Exchange/MixinAssetProxyDispatcher.sol
index dcfe9e1de..e9f882194 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/MixinAssetProxyDispatcher.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/MixinAssetProxyDispatcher.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 import "../../utils/Ownable/Ownable.sol";
 import "../../utils/LibBytes/LibBytes.sol";
@@ -151,6 +151,7 @@ contract MixinAssetProxyDispatcher is
                 /////// Setup Data Area ///////
                 // This area holds `assetData`.
                 let dataArea := add(cdStart, 132)
+                // solhint-disable-next-line no-empty-blocks
                 for {} lt(dataArea, cdEnd) {} {
                     mstore(dataArea, mload(assetData))
                     dataArea := add(dataArea, 32)
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/MixinExchangeCore.sol b/packages/contracts/src/2.0.0/protocol/Exchange/MixinExchangeCore.sol
index 9e63dc1c0..ec84b1e19 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/MixinExchangeCore.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/MixinExchangeCore.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "./libs/LibConstants.sol";
@@ -49,8 +49,6 @@ contract MixinExchangeCore is
     // Orders with specified senderAddress and with a salt less than their epoch to are considered cancelled
     mapping (address => mapping (address => uint256)) public orderEpoch;
 
-    ////// Core exchange functions //////
-
     /// @dev Cancels all orders created by makerAddress with a salt less than or equal to the targetOrderEpoch
     ///      and senderAddress equal to msg.sender (or null address if msg.sender == makerAddress).
     /// @param targetOrderEpoch Orders created with a salt less or equal to this value will be cancelled.
@@ -175,6 +173,7 @@ contract MixinExchangeCore is
         }
 
         // Validate order expiration
+        // solhint-disable-next-line not-rely-on-time
         if (block.timestamp >= order.expirationTimeSeconds) {
             orderInfo.orderStatus = uint8(OrderStatus.EXPIRED);
             return orderInfo;
@@ -375,21 +374,19 @@ contract MixinExchangeCore is
         returns (FillResults memory fillResults)
     {
         // Compute proportional transfer amounts
-        // TODO: All three are multiplied by the same fraction. This can
-        // potentially be optimized.
         fillResults.takerAssetFilledAmount = takerAssetFilledAmount;
         fillResults.makerAssetFilledAmount = getPartialAmount(
-            fillResults.takerAssetFilledAmount,
+            takerAssetFilledAmount,
             order.takerAssetAmount,
             order.makerAssetAmount
         );
         fillResults.makerFeePaid = getPartialAmount(
-            fillResults.takerAssetFilledAmount,
+            takerAssetFilledAmount,
             order.takerAssetAmount,
             order.makerFee
         );
         fillResults.takerFeePaid = getPartialAmount(
-            fillResults.takerAssetFilledAmount,
+            takerAssetFilledAmount,
             order.takerAssetAmount,
             order.takerFee
         );
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/MixinMatchOrders.sol b/packages/contracts/src/2.0.0/protocol/Exchange/MixinMatchOrders.sol
index bfe838837..56b309a1b 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/MixinMatchOrders.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/MixinMatchOrders.sol
@@ -11,7 +11,7 @@
   limitations under the License.
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "./libs/LibConstants.sol";
@@ -41,7 +41,6 @@ contract MixinMatchOrders is
     /// @param leftSignature Proof that order was created by the left maker.
     /// @param rightSignature Proof that order was created by the right maker.
     /// @return matchedFillResults Amounts filled and fees paid by maker and taker of matched orders.
-    /// TODO: Make this function external once supported by Solidity (See Solidity Issues #3199, #1603)
     function matchOrders(
         LibOrder.Order memory leftOrder,
         LibOrder.Order memory rightOrder,
@@ -184,7 +183,6 @@ contract MixinMatchOrders is
             leftTakerAssetFilledAmount = leftTakerAssetAmountRemaining;
 
             // The right order receives an amount proportional to how much was spent.
-            // TODO: Can we ensure rounding error is in the correct direction?
             rightTakerAssetFilledAmount = getPartialAmount(
                 rightOrder.takerAssetAmount,
                 rightOrder.makerAssetAmount,
@@ -195,7 +193,6 @@ contract MixinMatchOrders is
             rightTakerAssetFilledAmount = rightTakerAssetAmountRemaining;
 
             // The left order receives an amount proportional to how much was spent.
-            // TODO: Can we ensure rounding error is in the correct direction?
             leftTakerAssetFilledAmount = getPartialAmount(
                 rightOrder.makerAssetAmount,
                 rightOrder.takerAssetAmount,
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/MixinSignatureValidator.sol b/packages/contracts/src/2.0.0/protocol/Exchange/MixinSignatureValidator.sol
index 78f13286f..ac7382715 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/MixinSignatureValidator.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/MixinSignatureValidator.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 import "../../utils/LibBytes/LibBytes.sol";
 import "./mixins/MSignatureValidator.sol";
@@ -91,7 +91,6 @@ contract MixinSignatureValidator is
         view
         returns (bool isValid)
     {
-        // TODO: Domain separation: make hash depend on role. (Taker sig should not be valid as maker sig, etc.)
         require(
             signature.length > 0,
             "LENGTH_GREATER_THAN_0_REQUIRED"
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/MixinTransactions.sol b/packages/contracts/src/2.0.0/protocol/Exchange/MixinTransactions.sol
index 3b18ac733..88d2da7d7 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/MixinTransactions.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/MixinTransactions.sol
@@ -15,7 +15,7 @@
   limitations under the License.
 
 */
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 import "./libs/LibExchangeErrors.sol";
 import "./mixins/MSignatureValidator.sol";
@@ -37,7 +37,7 @@ contract MixinTransactions is
     address public currentContextAddress;
 
     // Hash for the EIP712 ZeroEx Transaction Schema
-    bytes32 constant EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH = keccak256(abi.encodePacked(
+    bytes32 constant internal EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH = keccak256(abi.encodePacked(
         "ZeroExTransaction(",
         "uint256 salt,",
         "address signerAddress,",
@@ -45,41 +45,6 @@ contract MixinTransactions is
         ")"
     ));
 
-    /// @dev Calculates EIP712 hash of the Transaction.
-    /// @param salt Arbitrary number to ensure uniqueness of transaction hash.
-    /// @param signerAddress Address of transaction signer.
-    /// @param data AbiV2 encoded calldata.
-    /// @return EIP712 hash of the Transaction.
-    function hashZeroExTransaction(
-        uint256 salt,
-        address signerAddress,
-        bytes memory data
-    )
-        internal
-        pure
-        returns (bytes32 result)
-    {
-        bytes32 schemaHash = EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH;
-        bytes32 dataHash = keccak256(data);
-        // Assembly for more efficiently computing:
-        // keccak256(abi.encode(
-        //   EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH,
-        //   salt,
-        //   signerAddress,
-        //   keccak256(data)
-        //  ));
-        assembly {
-            let memPtr := mload(64)
-            mstore(memPtr, schemaHash)
-            mstore(add(memPtr, 32), salt)
-            mstore(add(memPtr, 64), and(signerAddress, 0xffffffffffffffffffffffffffffffffffffffff))
-            mstore(add(memPtr, 96), dataHash)
-            result := keccak256(memPtr, 128)
-        }
-
-        return result;
-    }
-
     /// @dev Executes an exchange method call in the context of signer.
     /// @param salt Arbitrary number to ensure uniqueness of transaction hash.
     /// @param signerAddress Address of transaction signer.
@@ -134,9 +99,47 @@ contract MixinTransactions is
             "FAILED_EXECUTION"
         );
 
-        // Reset current transaction signer
-        // TODO: Check if gas is paid when currentContextAddress is already 0.
-        currentContextAddress = address(0);
+        // Reset current transaction signer if it was previously updated
+        if (signerAddress != msg.sender) {
+            currentContextAddress = address(0);
+        }
+    }
+
+    /// @dev Calculates EIP712 hash of the Transaction.
+    /// @param salt Arbitrary number to ensure uniqueness of transaction hash.
+    /// @param signerAddress Address of transaction signer.
+    /// @param data AbiV2 encoded calldata.
+    /// @return EIP712 hash of the Transaction.
+    function hashZeroExTransaction(
+        uint256 salt,
+        address signerAddress,
+        bytes memory data
+    )
+        internal
+        pure
+        returns (bytes32 result)
+    {
+        bytes32 schemaHash = EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH;
+        bytes32 dataHash = keccak256(data);
+
+        // Assembly for more efficiently computing:
+        // keccak256(abi.encode(
+        //     EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH,
+        //     salt,
+        //     signerAddress,
+        //     keccak256(data)
+        // ));
+
+        assembly {
+            let memPtr := mload(64)
+            mstore(memPtr, schemaHash)
+            mstore(add(memPtr, 32), salt)
+            mstore(add(memPtr, 64), and(signerAddress, 0xffffffffffffffffffffffffffffffffffffffff))
+            mstore(add(memPtr, 96), dataHash)
+            result := keccak256(memPtr, 128)
+        }
+
+        return result;
     }
 
     /// @dev The current function will be called in the context of this address (either 0x transaction signer or `msg.sender`).
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/MixinWrapperFunctions.sol b/packages/contracts/src/2.0.0/protocol/Exchange/MixinWrapperFunctions.sol
index 678d0252a..a16d2f897 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/MixinWrapperFunctions.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/MixinWrapperFunctions.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "./libs/LibMath.sol";
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IAssetProxyDispatcher.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IAssetProxyDispatcher.sol
index b73881c07..8db8d6f6c 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IAssetProxyDispatcher.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IAssetProxyDispatcher.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 
 contract IAssetProxyDispatcher {
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IExchange.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IExchange.sol
index 05e5dedf4..b92abba04 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IExchange.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IExchange.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "./IExchangeCore.sol";
@@ -27,6 +27,7 @@ import "./IAssetProxyDispatcher.sol";
 import "./IWrapperFunctions.sol";
 
 
+// solhint-disable no-empty-blocks
 contract IExchange is
     IExchangeCore,
     IMatchOrders,
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IExchangeCore.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IExchangeCore.sol
index 2b573eb1a..9995e0385 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IExchangeCore.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IExchangeCore.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "../libs/LibOrder.sol";
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IMatchOrders.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IMatchOrders.sol
index d44116474..73447f3ae 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IMatchOrders.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IMatchOrders.sol
@@ -15,7 +15,7 @@
   limitations under the License.
 
 */
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "../libs/LibOrder.sol";
@@ -33,7 +33,6 @@ contract IMatchOrders {
     /// @param leftSignature Proof that order was created by the left maker.
     /// @param rightSignature Proof that order was created by the right maker.
     /// @return matchedFillResults Amounts filled and fees paid by maker and taker of matched orders.
-    /// TODO: Make this function external once supported by Solidity (See Solidity Issues #3199, #1603)
     function matchOrders(
         LibOrder.Order memory leftOrder,
         LibOrder.Order memory rightOrder,
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ISignatureValidator.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ISignatureValidator.sol
index c5a4a57e1..1fd0eccf0 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ISignatureValidator.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ISignatureValidator.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 
 contract ISignatureValidator {
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ITransactions.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ITransactions.sol
index aaaee389f..4446c55ce 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ITransactions.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ITransactions.sol
@@ -15,7 +15,7 @@
   limitations under the License.
 
 */
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 
 contract ITransactions {
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IValidator.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IValidator.sol
index 2c0a5dbe2..2dd69100c 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IValidator.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IValidator.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.23;
+pragma solidity 0.4.24;
 
 
 contract IValidator {
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IWallet.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IWallet.sol
index c2db4a5b1..c97161ca6 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IWallet.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IWallet.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 
 contract IWallet {
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IWrapperFunctions.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IWrapperFunctions.sol
index 04257b883..ad7a56a06 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IWrapperFunctions.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/IWrapperFunctions.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "../libs/LibOrder.sol";
@@ -24,6 +24,7 @@ import "../libs/LibFillResults.sol";
 
 
 contract IWrapperFunctions {
+
     /// @dev Fills the input order. Reverts if exact takerAssetFillAmount not filled.
     /// @param order LibOrder.Order struct containing order specifications.
     /// @param takerAssetFillAmount Desired amount of takerAsset to sell.
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibConstants.sol b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibConstants.sol
index 76200ec44..6918d755e 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibConstants.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibConstants.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 
 contract LibConstants {
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibEIP712.sol b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibEIP712.sol
index 2bd7b60d4..1fc41dafd 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibEIP712.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibEIP712.sol
@@ -16,18 +16,18 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 
 contract LibEIP712 {
     // EIP191 header for EIP712 prefix
-    string constant EIP191_HEADER = "\x19\x01";
+    string constant internal EIP191_HEADER = "\x19\x01";
 
     // EIP712 Domain Name value
-    string constant EIP712_DOMAIN_NAME = "0x Protocol";
+    string constant internal EIP712_DOMAIN_NAME = "0x Protocol";
 
     // EIP712 Domain Version value
-    string constant EIP712_DOMAIN_VERSION = "2";
+    string constant internal EIP712_DOMAIN_VERSION = "2";
 
     // Hash of the EIP712 Domain Separator Schema
     bytes32 public constant EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(abi.encodePacked(
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibExchangeErrors.sol b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibExchangeErrors.sol
index 99f683e1a..a0f75bc06 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibExchangeErrors.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibExchangeErrors.sol
@@ -16,7 +16,8 @@
 
 */
 
-pragma solidity ^0.4.24;
+// solhint-disable
+pragma solidity 0.4.24;
 
 
 /// @dev This contract documents the revert reasons used in the Exchange contract.
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibFillResults.sol b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibFillResults.sol
index 35fa9ac0f..1b4181d94 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibFillResults.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibFillResults.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 import "../../../utils/SafeMath/SafeMath.sol";
 
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibMath.sol b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibMath.sol
index 9da784854..46c13d390 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibMath.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibMath.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 import "../../../utils/SafeMath/SafeMath.sol";
 
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibOrder.sol b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibOrder.sol
index dda581d9f..68f2c8aed 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibOrder.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/libs/LibOrder.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 import "./LibEIP712.sol";
 
@@ -26,7 +26,7 @@ contract LibOrder is
 {
 
     // Hash for the EIP712 Order Schema
-    bytes32 constant EIP712_ORDER_SCHEMA_HASH = keccak256(abi.encodePacked(
+    bytes32 constant internal EIP712_ORDER_SCHEMA_HASH = keccak256(abi.encodePacked(
         "Order(",
         "address makerAddress,",
         "address takerAddress,",
@@ -55,6 +55,7 @@ contract LibOrder is
         CANCELLED                    // Order has been cancelled
     }
 
+    // solhint-disable max-line-length
     struct Order {
         address makerAddress;           // Address that created the order.      
         address takerAddress;           // Address that is allowed to fill the order. If set to 0, any address is allowed to fill the order.          
@@ -69,6 +70,7 @@ contract LibOrder is
         bytes makerAssetData;           // Encoded data that can be decoded by a specified proxy contract when transferring makerAsset. The last byte references the id of this proxy.
         bytes takerAssetData;           // Encoded data that can be decoded by a specified proxy contract when transferring takerAsset. The last byte references the id of this proxy.
     }
+    // solhint-enable max-line-length
 
     struct OrderInfo {
         uint8 orderStatus;                    // Status that describes order's validity and fillability.
@@ -99,21 +101,23 @@ contract LibOrder is
         bytes32 schemaHash = EIP712_ORDER_SCHEMA_HASH;
         bytes32 makerAssetDataHash = keccak256(order.makerAssetData);
         bytes32 takerAssetDataHash = keccak256(order.takerAssetData);
+
         // Assembly for more efficiently computing:
-        //   keccak256(abi.encode(
-        //       order.makerAddress,
-        //       order.takerAddress,
-        //       order.feeRecipientAddress,
-        //       order.senderAddress,
-        //       order.makerAssetAmount,
-        //       order.takerAssetAmount,
-        //       order.makerFee,
-        //       order.takerFee,
-        //       order.expirationTimeSeconds,
-        //       order.salt,
-        //       keccak256(order.makerAssetData),
-        //       keccak256(order.takerAssetData)
-        //   ));
+        //    keccak256(abi.encode(
+        //        order.makerAddress,
+        //        order.takerAddress,
+        //        order.feeRecipientAddress,
+        //        order.senderAddress,
+        //        order.makerAssetAmount,
+        //        order.takerAssetAmount,
+        //        order.makerFee,
+        //        order.takerFee,
+        //        order.expirationTimeSeconds,
+        //        order.salt,
+        //        keccak256(order.makerAssetData),
+        //        keccak256(order.takerAssetData)
+        //    ));
+
         assembly {
             // Backup
             // solhint-disable-next-line space-after-comma
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MAssetProxyDispatcher.sol b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MAssetProxyDispatcher.sol
index 367b37e80..c6904300a 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MAssetProxyDispatcher.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MAssetProxyDispatcher.sol
@@ -16,8 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "../interfaces/IAssetProxyDispatcher.sol";
 
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MExchangeCore.sol b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MExchangeCore.sol
index e28d9d25b..9e3b5a2e2 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MExchangeCore.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MExchangeCore.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "../libs/LibOrder.sol";
@@ -102,7 +102,6 @@ contract MExchangeCore is
         internal
         view;
 
-
     /// @dev Validates context for cancelOrder. Succeeds or throws.
     /// @param order to be cancelled.
     /// @param orderInfo OrderStatus, orderHash, and amount already filled of order.
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MMatchOrders.sol b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MMatchOrders.sol
index 289514b24..a31ec1585 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MMatchOrders.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MMatchOrders.sol
@@ -15,7 +15,7 @@
   limitations under the License.
 
 */
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "../libs/LibOrder.sol";
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MSignatureValidator.sol b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MSignatureValidator.sol
index 83650b4aa..f14f2ba00 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MSignatureValidator.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MSignatureValidator.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 import "../interfaces/ISignatureValidator.sol";
 
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MTransactions.sol b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MTransactions.sol
index a9fa6d4e2..f2b5e4b16 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MTransactions.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MTransactions.sol
@@ -15,7 +15,7 @@
   limitations under the License.
 
 */
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 import "../interfaces/ITransactions.sol";
 
diff --git a/packages/contracts/src/2.0.0/test/DummyERC20Token/DummyERC20Token.sol b/packages/contracts/src/2.0.0/test/DummyERC20Token/DummyERC20Token.sol
index 7a2702449..97801166a 100644
--- a/packages/contracts/src/2.0.0/test/DummyERC20Token/DummyERC20Token.sol
+++ b/packages/contracts/src/2.0.0/test/DummyERC20Token/DummyERC20Token.sol
@@ -16,8 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "../Mintable/Mintable.sol";
 import "../../utils/Ownable/Ownable.sol";
diff --git a/packages/contracts/src/2.0.0/test/DummyERC721Receiver/DummyERC721Receiver.sol b/packages/contracts/src/2.0.0/test/DummyERC721Receiver/DummyERC721Receiver.sol
index b027ac960..5dce74a14 100644
--- a/packages/contracts/src/2.0.0/test/DummyERC721Receiver/DummyERC721Receiver.sol
+++ b/packages/contracts/src/2.0.0/test/DummyERC721Receiver/DummyERC721Receiver.sol
@@ -23,7 +23,7 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 import "../../tokens/ERC721Token/IERC721Receiver.sol";
 
diff --git a/packages/contracts/src/2.0.0/test/DummyERC721Token/DummyERC721Token.sol b/packages/contracts/src/2.0.0/test/DummyERC721Token/DummyERC721Token.sol
index de76f10c5..627746a52 100644
--- a/packages/contracts/src/2.0.0/test/DummyERC721Token/DummyERC721Token.sol
+++ b/packages/contracts/src/2.0.0/test/DummyERC721Token/DummyERC721Token.sol
@@ -16,13 +16,13 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "../../tokens/ERC721Token/ERC721Token.sol";
 import "../../utils/Ownable/Ownable.sol";
 
 
+// solhint-disable no-empty-blocks
 contract DummyERC721Token is
     Ownable,
     ERC721Token
diff --git a/packages/contracts/src/2.0.0/test/ExchangeWrapper/ExchangeWrapper.sol b/packages/contracts/src/2.0.0/test/ExchangeWrapper/ExchangeWrapper.sol
index f20e2a944..2fa0e3c5e 100644
--- a/packages/contracts/src/2.0.0/test/ExchangeWrapper/ExchangeWrapper.sol
+++ b/packages/contracts/src/2.0.0/test/ExchangeWrapper/ExchangeWrapper.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "../../protocol/Exchange/interfaces/IExchange.sol";
@@ -27,7 +27,7 @@ contract ExchangeWrapper {
 
     // Exchange contract.
     // solhint-disable-next-line var-name-mixedcase
-    IExchange EXCHANGE;
+    IExchange internal EXCHANGE;
 
     constructor (address _exchange)
         public
@@ -35,6 +35,35 @@ contract ExchangeWrapper {
         EXCHANGE = IExchange(_exchange);
     }
 
+    /// @dev Cancels all orders created by sender with a salt less than or equal to the targetOrderEpoch
+    ///      and senderAddress equal to this contract.
+    /// @param targetOrderEpoch Orders created with a salt less or equal to this value will be cancelled.
+    /// @param salt Arbitrary value to gaurantee uniqueness of 0x transaction hash.
+    /// @param makerSignature Proof that maker wishes to call this function with given params.
+    function cancelOrdersUpTo(
+        uint256 targetOrderEpoch,
+        uint256 salt,
+        bytes makerSignature
+    )
+        external
+    {
+        address makerAddress = msg.sender;
+
+        // Encode arguments into byte array.
+        bytes memory data = abi.encodeWithSelector(
+            EXCHANGE.cancelOrdersUpTo.selector,
+            targetOrderEpoch
+        );
+
+        // Call `cancelOrdersUpTo` via `executeTransaction`.
+        EXCHANGE.executeTransaction(
+            salt,
+            makerAddress,
+            data,
+            makerSignature
+        );
+    }
+
     /// @dev Fills an order using `msg.sender` as the taker.
     /// @param order Order struct containing order specifications.
     /// @param takerAssetFillAmount Desired amount of takerAsset to sell.
@@ -68,33 +97,4 @@ contract ExchangeWrapper {
             takerSignature
         );
     }
-
-    /// @dev Cancels all orders created by sender with a salt less than or equal to the targetOrderEpoch
-    ///      and senderAddress equal to this contract.
-    /// @param targetOrderEpoch Orders created with a salt less or equal to this value will be cancelled.
-    /// @param salt Arbitrary value to gaurantee uniqueness of 0x transaction hash.
-    /// @param makerSignature Proof that maker wishes to call this function with given params.
-    function cancelOrdersUpTo(
-        uint256 targetOrderEpoch,
-        uint256 salt,
-        bytes makerSignature
-    )
-        external
-    {
-        address makerAddress = msg.sender;
-
-        // Encode arguments into byte array.
-        bytes memory data = abi.encodeWithSelector(
-            EXCHANGE.cancelOrdersUpTo.selector,
-            targetOrderEpoch
-        );
-
-        // Call `cancelOrdersUpTo` via `executeTransaction`.
-        EXCHANGE.executeTransaction(
-            salt,
-            makerAddress,
-            data,
-            makerSignature
-        );
-    }
 }
diff --git a/packages/contracts/src/2.0.0/test/Mintable/Mintable.sol b/packages/contracts/src/2.0.0/test/Mintable/Mintable.sol
index bccb74ce8..767cc8d25 100644
--- a/packages/contracts/src/2.0.0/test/Mintable/Mintable.sol
+++ b/packages/contracts/src/2.0.0/test/Mintable/Mintable.sol
@@ -16,8 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "../../tokens/UnlimitedAllowanceToken/UnlimitedAllowanceToken.sol";
 import "../../utils/SafeMath/SafeMath.sol";
@@ -27,7 +26,10 @@ import "../../utils/SafeMath/SafeMath.sol";
  * Mintable
  * Base contract that creates a mintable UnlimitedAllowanceToken
  */
-contract Mintable is UnlimitedAllowanceToken, SafeMath {
+contract Mintable is 
+    UnlimitedAllowanceToken,
+    SafeMath
+{
     function mint(uint256 _value)
         public
     {
diff --git a/packages/contracts/src/2.0.0/test/TestAssetProxyDispatcher/TestAssetProxyDispatcher.sol b/packages/contracts/src/2.0.0/test/TestAssetProxyDispatcher/TestAssetProxyDispatcher.sol
index be7fea7d3..07986f4bb 100644
--- a/packages/contracts/src/2.0.0/test/TestAssetProxyDispatcher/TestAssetProxyDispatcher.sol
+++ b/packages/contracts/src/2.0.0/test/TestAssetProxyDispatcher/TestAssetProxyDispatcher.sol
@@ -16,8 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "../../protocol/Exchange/MixinAssetProxyDispatcher.sol";
 
@@ -27,7 +26,8 @@ contract TestAssetProxyDispatcher is MixinAssetProxyDispatcher {
         bytes memory assetData,
         address from,
         address to,
-        uint256 amount)
+        uint256 amount
+    )
         public
     {
         dispatchTransferFrom(assetData, from, to, amount);
diff --git a/packages/contracts/src/2.0.0/test/TestAssetProxyOwner/TestAssetProxyOwner.sol b/packages/contracts/src/2.0.0/test/TestAssetProxyOwner/TestAssetProxyOwner.sol
index ddcc62f35..d6b6b29f2 100644
--- a/packages/contracts/src/2.0.0/test/TestAssetProxyOwner/TestAssetProxyOwner.sol
+++ b/packages/contracts/src/2.0.0/test/TestAssetProxyOwner/TestAssetProxyOwner.sol
@@ -16,14 +16,16 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 import "../../protocol/AssetProxyOwner/AssetProxyOwner.sol";
 
 
+// solhint-disable no-empty-blocks
 contract TestAssetProxyOwner is
     AssetProxyOwner
 {
+
     constructor(
         address[] memory _owners,
         address[] memory _assetProxyContracts,
@@ -32,11 +34,11 @@ contract TestAssetProxyOwner is
     )
         public
         AssetProxyOwner(_owners, _assetProxyContracts, _required, _secondsTimeLocked)
-    {
-    }
+    {}
     
     function testValidRemoveAuthorizedAddressAtIndexTx(uint256 id)
         public
+        view
         validRemoveAuthorizedAddressAtIndexTx(id)
         returns (bool)
     {
diff --git a/packages/contracts/src/2.0.0/test/TestLibBytes/TestLibBytes.sol b/packages/contracts/src/2.0.0/test/TestLibBytes/TestLibBytes.sol
index f52f635e1..00d861e61 100644
--- a/packages/contracts/src/2.0.0/test/TestLibBytes/TestLibBytes.sol
+++ b/packages/contracts/src/2.0.0/test/TestLibBytes/TestLibBytes.sol
@@ -16,8 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "../../utils/LibBytes/LibBytes.sol";
 
diff --git a/packages/contracts/src/2.0.0/test/TestLibs/TestLibs.sol b/packages/contracts/src/2.0.0/test/TestLibs/TestLibs.sol
index df8eb55ce..5a349527b 100644
--- a/packages/contracts/src/2.0.0/test/TestLibs/TestLibs.sol
+++ b/packages/contracts/src/2.0.0/test/TestLibs/TestLibs.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "../../protocol/Exchange/libs/LibMath.sol";
@@ -32,7 +32,8 @@ contract TestLibs is
     function publicGetPartialAmount(
         uint256 numerator,
         uint256 denominator,
-        uint256 target)
+        uint256 target
+    )
         public
         pure
         returns (uint256 partialAmount)
@@ -48,7 +49,8 @@ contract TestLibs is
     function publicIsRoundingError(
         uint256 numerator,
         uint256 denominator,
-        uint256 target)
+        uint256 target
+    )
         public
         pure
         returns (bool isError)
diff --git a/packages/contracts/src/2.0.0/test/TestSignatureValidator/TestSignatureValidator.sol b/packages/contracts/src/2.0.0/test/TestSignatureValidator/TestSignatureValidator.sol
index 591ae3378..e1a610469 100644
--- a/packages/contracts/src/2.0.0/test/TestSignatureValidator/TestSignatureValidator.sol
+++ b/packages/contracts/src/2.0.0/test/TestSignatureValidator/TestSignatureValidator.sol
@@ -16,8 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "../../protocol/Exchange/MixinSignatureValidator.sol";
 import "../../protocol/Exchange/MixinTransactions.sol";
diff --git a/packages/contracts/src/2.0.0/test/TestValidator/TestValidator.sol b/packages/contracts/src/2.0.0/test/TestValidator/TestValidator.sol
index 5076dedc9..6278aede0 100644
--- a/packages/contracts/src/2.0.0/test/TestValidator/TestValidator.sol
+++ b/packages/contracts/src/2.0.0/test/TestValidator/TestValidator.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 import "../../protocol/Exchange/interfaces/IValidator.sol";
 
@@ -27,7 +27,7 @@ contract TestValidator is
 
     // The single valid signer for this wallet.
     // solhint-disable-next-line var-name-mixedcase
-    address VALID_SIGNER;
+    address internal VALID_SIGNER;
 
     /// @dev constructs a new `TestValidator` with a single valid signer.
     /// @param validSigner The sole, valid signer.
@@ -40,6 +40,7 @@ contract TestValidator is
     /// @param signerAddress Address that should have signed the given hash.
     /// @param signature Proof of signing.
     /// @return Validity of signature.
+    // solhint-disable no-unused-vars
     function isValidSignature(
         bytes32 hash,
         address signerAddress,
@@ -51,4 +52,5 @@ contract TestValidator is
     {
         return (signerAddress == VALID_SIGNER);
     }
+    // solhint-enable no-unused-vars
 }
diff --git a/packages/contracts/src/2.0.0/test/TestWallet/TestWallet.sol b/packages/contracts/src/2.0.0/test/TestWallet/TestWallet.sol
index 07dfac588..0415823e3 100644
--- a/packages/contracts/src/2.0.0/test/TestWallet/TestWallet.sol
+++ b/packages/contracts/src/2.0.0/test/TestWallet/TestWallet.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 import "../../protocol/Exchange/interfaces/IWallet.sol";
 import "../../utils/LibBytes/LibBytes.sol";
@@ -27,11 +27,9 @@ contract TestWallet is
 {
     using LibBytes for bytes;
 
-    string constant LENGTH_65_REQUIRED = "LENGTH_65_REQUIRED";
-
     // The owner of this wallet.
     // solhint-disable-next-line var-name-mixedcase
-    address WALLET_OWNER;
+    address internal WALLET_OWNER;
 
     /// @dev constructs a new `TestWallet` with a single owner.
     /// @param walletOwner The owner of this wallet.
@@ -54,7 +52,7 @@ contract TestWallet is
     {
         require(
             eip712Signature.length == 65,
-            LENGTH_65_REQUIRED
+            "LENGTH_65_REQUIRED"
         );
 
         uint8 v = uint8(eip712Signature[0]);
diff --git a/packages/contracts/src/2.0.0/test/Whitelist/Whitelist.sol b/packages/contracts/src/2.0.0/test/Whitelist/Whitelist.sol
index 07bd7d531..60cac26ea 100644
--- a/packages/contracts/src/2.0.0/test/Whitelist/Whitelist.sol
+++ b/packages/contracts/src/2.0.0/test/Whitelist/Whitelist.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 pragma experimental ABIEncoderV2;
 
 import "../../protocol/Exchange/interfaces/IExchange.sol";
@@ -27,28 +27,22 @@ import "../../utils/Ownable/Ownable.sol";
 contract Whitelist is
     Ownable
 {
-    // Revert reasons
-    string constant MAKER_NOT_WHITELISTED = "MAKER_NOT_WHITELISTED"; // Maker address not whitelisted.
-    string constant TAKER_NOT_WHITELISTED = "TAKER_NOT_WHITELISTED"; // Taker address not whitelisted.
-    string constant INVALID_SENDER = "INVALID_SENDER"; // Sender must equal transaction origin.
 
     // Mapping of address => whitelist status.
     mapping (address => bool) public isWhitelisted;
 
     // Exchange contract.
-    // solhint-disable-next-line var-name-mixedcase
-    IExchange EXCHANGE;
+    // solhint-disable var-name-mixedcase
+    IExchange internal EXCHANGE;
+    bytes internal TX_ORIGIN_SIGNATURE;
+    // solhint-enable var-name-mixedcase
 
-    byte constant VALIDATOR_SIGNATURE_BYTE = "\x06";
-    // solhint-disable-next-line var-name-mixedcase
-    bytes TX_ORIGIN_SIGNATURE;
+    byte constant internal VALIDATOR_SIGNATURE_BYTE = "\x06";
 
     constructor (address _exchange)
         public
     {
-        // solhint-disable-next-line var-name-mixedcase
         EXCHANGE = IExchange(_exchange);
-        // solhint-disable-next-line var-name-mixedcase
         TX_ORIGIN_SIGNATURE = abi.encodePacked(address(this), VALIDATOR_SIGNATURE_BYTE);
     }
 
@@ -65,6 +59,27 @@ contract Whitelist is
         isWhitelisted[target] = isApproved;
     }
 
+    /// @dev Verifies signer is same as signer of current Ethereum transaction.
+    ///      NOTE: This function can currently be used to validate signatures coming from outside of this contract.
+    ///      Extra safety checks can be added for a production contract.
+    /// @param signerAddress Address that should have signed the given hash.
+    /// @param signature Proof of signing.
+    /// @return Validity of order signature.
+    // solhint-disable no-unused-vars
+    function isValidSignature(
+        bytes32 hash,
+        address signerAddress,
+        bytes signature
+    )
+        external
+        view
+        returns (bool isValid)
+    {
+        // solhint-disable-next-line avoid-tx-origin
+        return signerAddress == tx.origin;
+    }
+    // solhint-enable no-unused-vars
+
     /// @dev Fills an order using `msg.sender` as the taker.
     ///      The transaction will revert if both the maker and taker are not whitelisted.
     ///      Orders should specify this contract as the `senderAddress` in order to gaurantee
@@ -85,20 +100,21 @@ contract Whitelist is
 
         // This contract must be the entry point for the transaction.
         require(
+            // solhint-disable-next-line avoid-tx-origin
             takerAddress == tx.origin,
-            INVALID_SENDER
+            "INVALID_SENDER"
         );
 
         // Check if maker is on the whitelist.
         require(
             isWhitelisted[order.makerAddress],
-            MAKER_NOT_WHITELISTED
+            "MAKER_NOT_WHITELISTED"
         );
 
         // Check if taker is on the whitelist.
         require(
             isWhitelisted[takerAddress],
-            TAKER_NOT_WHITELISTED
+            "TAKER_NOT_WHITELISTED"
         );
 
         // Encode arguments into byte array.
@@ -117,22 +133,4 @@ contract Whitelist is
             TX_ORIGIN_SIGNATURE
         );
     }
-
-    /// @dev Verifies signer is same as signer of current Ethereum transaction.
-    ///      NOTE: This function can currently be used to validate signatures coming from outside of this contract.
-    ///      Extra safety checks can be added for a production contract.
-    /// @param signerAddress Address that should have signed the given hash.
-    /// @param signature Proof of signing.
-    /// @return Validity of order signature.
-    function isValidSignature(
-        bytes32 hash,
-        address signerAddress,
-        bytes signature
-    )
-        external
-        view
-        returns (bool isValid)
-    {
-        return signerAddress == tx.origin;
-    }
 }
diff --git a/packages/contracts/src/2.0.0/tokens/ERC20Token/ERC20Token.sol b/packages/contracts/src/2.0.0/tokens/ERC20Token/ERC20Token.sol
index 59dc7d7bf..d9950145d 100644
--- a/packages/contracts/src/2.0.0/tokens/ERC20Token/ERC20Token.sol
+++ b/packages/contracts/src/2.0.0/tokens/ERC20Token/ERC20Token.sol
@@ -16,20 +16,15 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "./IERC20Token.sol";
 
 
 contract ERC20Token is IERC20Token {
 
-    string constant INSUFFICIENT_BALANCE = "ERC20_INSUFFICIENT_BALANCE";
-    string constant INSUFFICIENT_ALLOWANCE = "ERC20_INSUFFICIENT_ALLOWANCE";
-    string constant OVERFLOW = "Transfer would result in an overflow.";
-
-    mapping (address => uint256) balances;
-    mapping (address => mapping (address => uint256)) allowed;
+    mapping (address => uint256) internal balances;
+    mapping (address => mapping (address => uint256)) internal allowed;
 
     uint256 public totalSupply;
 
@@ -39,11 +34,11 @@ contract ERC20Token is IERC20Token {
     {
         require(
             balances[msg.sender] >= _value,
-            INSUFFICIENT_BALANCE
+            "ERC20_INSUFFICIENT_BALANCE"
         );
         require(
             balances[_to] + _value >= balances[_to],
-            OVERFLOW
+            "OVERFLOW"
         );
         balances[msg.sender] -= _value;
         balances[_to] += _value;
@@ -57,15 +52,15 @@ contract ERC20Token is IERC20Token {
     {
         require(
             balances[_from] >= _value,
-            INSUFFICIENT_BALANCE
+            "ERC20_INSUFFICIENT_BALANCE"
         );
         require(
             allowed[_from][msg.sender] >= _value,
-            INSUFFICIENT_ALLOWANCE
+            "ERC20_INSUFFICIENT_ALLOWANCE"
         );
         require(
             balances[_to] + _value >= balances[_to],
-            OVERFLOW
+            "OVERFLOW"
         );
         balances[_to] += _value;
         balances[_from] -= _value;
@@ -84,7 +79,8 @@ contract ERC20Token is IERC20Token {
     }
 
     function balanceOf(address _owner)
-        public view
+        public
+        view
         returns (uint256)
     {
         return balances[_owner];
diff --git a/packages/contracts/src/2.0.0/tokens/ERC20Token/IERC20Token.sol b/packages/contracts/src/2.0.0/tokens/ERC20Token/IERC20Token.sol
index de4ed2af9..5ee5e1011 100644
--- a/packages/contracts/src/2.0.0/tokens/ERC20Token/IERC20Token.sol
+++ b/packages/contracts/src/2.0.0/tokens/ERC20Token/IERC20Token.sol
@@ -16,8 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 
 contract IERC20Token {
@@ -60,6 +59,7 @@ contract IERC20Token {
         public view
         returns (uint256);
 
+    // solhint-disable-next-line no-simple-event-func-name
     event Transfer(
         address indexed _from,
         address indexed _to,
diff --git a/packages/contracts/src/2.0.0/tokens/ERC721Token/ERC721Token.sol b/packages/contracts/src/2.0.0/tokens/ERC721Token/ERC721Token.sol
index defb506a8..60603aa19 100644
--- a/packages/contracts/src/2.0.0/tokens/ERC721Token/ERC721Token.sol
+++ b/packages/contracts/src/2.0.0/tokens/ERC721Token/ERC721Token.sol
@@ -23,7 +23,7 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 import "./IERC721Token.sol";
 import "./IERC721Receiver.sol";
@@ -41,7 +41,7 @@ contract ERC721Token is
 {
     // Equals to `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`
     // which can be also obtained as `ERC721Receiver(0).onERC721Received.selector`
-    bytes4 constant ERC721_RECEIVED = 0xf0b9e5ba;
+    bytes4 constant internal ERC721_RECEIVED = 0xf0b9e5ba;
 
     // Mapping from token ID to owner
     mapping (uint256 => address) internal tokenOwner;
@@ -73,7 +73,7 @@ contract ERC721Token is
         _;
     }
 
-    function ERC721Token(
+    constructor (
         string _name,
         string _symbol)
         public
diff --git a/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Receiver.sol b/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Receiver.sol
index f72c75638..f2e8f3c88 100644
--- a/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Receiver.sol
+++ b/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Receiver.sol
@@ -23,7 +23,7 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 
 /**
@@ -38,7 +38,7 @@ contract IERC721Receiver {
     *  Equals to `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`,
     *  which can be also obtained as `ERC721Receiver(0).onERC721Received.selector`
     */
-    bytes4 constant ERC721_RECEIVED = 0xf0b9e5ba;
+    bytes4 constant internal ERC721_RECEIVED = 0xf0b9e5ba;
 
     /**
     * @notice Handle the receipt of an NFT
diff --git a/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Token.sol b/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Token.sol
index 0d64ee861..4d57ece38 100644
--- a/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Token.sol
+++ b/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Token.sol
@@ -23,7 +23,7 @@ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 
 /**
@@ -40,11 +40,13 @@ contract IERC721Token {
         address indexed _to,
         uint256 _tokenId
     );
+
     event Approval(
         address indexed _owner,
         address indexed _approved,
         uint256 _tokenId
     );
+
     event ApprovalForAll(
         address indexed _owner,
         address indexed _operator,
@@ -55,6 +57,7 @@ contract IERC721Token {
         public
         view
         returns (string);
+
     function symbol()
         public
         view
@@ -64,10 +67,12 @@ contract IERC721Token {
         public
         view
         returns (uint256 _balance);
+
     function ownerOf(uint256 _tokenId)
         public
         view
         returns (address _owner);
+
     function exists(uint256 _tokenId)
         public
         view
@@ -75,6 +80,7 @@ contract IERC721Token {
 
     function approve(address _to, uint256 _tokenId)
         public;
+
     function getApproved(uint256 _tokenId)
         public
         view
@@ -82,6 +88,7 @@ contract IERC721Token {
 
     function setApprovalForAll(address _operator, bool _approved)
         public;
+
     function isApprovedForAll(address _owner, address _operator)
         public
         view
@@ -90,17 +97,22 @@ contract IERC721Token {
     function transferFrom(
         address _from,
         address _to,
-        uint256 _tokenId)
+        uint256 _tokenId
+    )
         public;
+
     function safeTransferFrom(
         address _from,
         address _to,
-        uint256 _tokenId)
+        uint256 _tokenId
+    )
         public;
+
     function safeTransferFrom(
         address _from,
         address _to,
         uint256 _tokenId,
-        bytes _data)
+        bytes _data
+    )
         public;
 }
diff --git a/packages/contracts/src/2.0.0/tokens/EtherToken/IEtherToken.sol b/packages/contracts/src/2.0.0/tokens/EtherToken/IEtherToken.sol
new file mode 100644
index 000000000..9e2e68766
--- /dev/null
+++ b/packages/contracts/src/2.0.0/tokens/EtherToken/IEtherToken.sol
@@ -0,0 +1,33 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity 0.4.24;
+
+import "../ERC20Token/IERC20Token.sol";
+
+
+contract IEtherToken is
+    IERC20Token
+{
+    function deposit()
+        public
+        payable;
+    
+    function withdraw(uint256 amount)
+        public;
+}
diff --git a/packages/contracts/src/2.0.0/tokens/WETH9/WETH9.sol b/packages/contracts/src/2.0.0/tokens/EtherToken/WETH9.sol
index 378a507b9..1fdb04de5 100644
--- a/packages/contracts/src/2.0.0/tokens/WETH9/WETH9.sol
+++ b/packages/contracts/src/2.0.0/tokens/EtherToken/WETH9.sol
@@ -13,6 +13,7 @@
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+// solhint-disable
 pragma solidity ^0.4.18;
 
 
diff --git a/packages/contracts/src/2.0.0/tokens/UnlimitedAllowanceToken/UnlimitedAllowanceToken.sol b/packages/contracts/src/2.0.0/tokens/UnlimitedAllowanceToken/UnlimitedAllowanceToken.sol
index 845324e4e..9feb5c914 100644
--- a/packages/contracts/src/2.0.0/tokens/UnlimitedAllowanceToken/UnlimitedAllowanceToken.sol
+++ b/packages/contracts/src/2.0.0/tokens/UnlimitedAllowanceToken/UnlimitedAllowanceToken.sol
@@ -16,15 +16,14 @@
 
 */
 
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 import "../ERC20Token/ERC20Token.sol";
 
 
 contract UnlimitedAllowanceToken is ERC20Token {
 
-    uint256 constant MAX_UINT = 2**256 - 1;
+    uint256 constant internal MAX_UINT = 2**256 - 1;
 
     /// @dev ERC20 transferFrom, modified such that an allowance of MAX_UINT represents an unlimited allowance. See https://github.com/ethereum/EIPs/issues/717
     /// @param _from Address to transfer from.
@@ -38,15 +37,15 @@ contract UnlimitedAllowanceToken is ERC20Token {
         uint256 allowance = allowed[_from][msg.sender];
         require(
             balances[_from] >= _value,
-            INSUFFICIENT_BALANCE
+            "ERC20_INSUFFICIENT_BALANCE"
         );
         require(
             allowance >= _value,
-            INSUFFICIENT_ALLOWANCE
+            "ERC20_INSUFFICIENT_ALLOWANCE"
         );
         require(
             balances[_to] + _value >= balances[_to],
-            OVERFLOW
+            "OVERFLOW"
         );
         balances[_to] += _value;
         balances[_from] -= _value;
diff --git a/packages/contracts/src/2.0.0/tokens/ZRXToken/ZRXToken.sol b/packages/contracts/src/2.0.0/tokens/ZRXToken/ZRXToken.sol
index ed0670072..28c0b2fb3 100644
--- a/packages/contracts/src/2.0.0/tokens/ZRXToken/ZRXToken.sol
+++ b/packages/contracts/src/2.0.0/tokens/ZRXToken/ZRXToken.sol
@@ -16,20 +16,24 @@
 
 */
 
-pragma solidity ^0.4.11;
+pragma solidity 0.4.11;
 
+// solhint-disable-next-line max-line-length
 import { UnlimitedAllowanceToken_v1 as UnlimitedAllowanceToken } from "../../../1.0.0/UnlimitedAllowanceToken/UnlimitedAllowanceToken_v1.sol";
 
 
-
 contract ZRXToken is UnlimitedAllowanceToken {
 
+    // solhint-disable const-name-snakecase
     uint8 constant public decimals = 18;
     uint public totalSupply = 10**27; // 1 billion tokens, 18 decimal places
     string constant public name = "0x Protocol Token";
     string constant public symbol = "ZRX";
+    // solhint-enableconst-name-snakecase
 
-    function ZRXToken() {
+    function ZRXToken()
+        public
+    {
         balances[msg.sender] = totalSupply;
     }
 }
diff --git a/packages/contracts/src/2.0.0/utils/LibBytes/LibBytes.sol b/packages/contracts/src/2.0.0/utils/LibBytes/LibBytes.sol
index c2fff5efb..01d34fa8f 100644
--- a/packages/contracts/src/2.0.0/utils/LibBytes/LibBytes.sol
+++ b/packages/contracts/src/2.0.0/utils/LibBytes/LibBytes.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity 0.4.24;
 
 
 library LibBytes {
@@ -115,6 +115,7 @@ library LibBytes {
                     // Copy whole words front to back
                     // Note: the first check is always true,
                     // this could have been a do-while loop.
+                    // solhint-disable-next-line no-empty-blocks
                     for {} lt(source, sEnd) {} {
                         mstore(dest, mload(source))
                         source := add(source, 32)
@@ -145,6 +146,7 @@ library LibBytes {
                     // 2**255, so they can be safely re-interpreted as signed.
                     // Note: the first check is always true,
                     // this could have been a do-while loop.
+                    // solhint-disable-next-line no-empty-blocks
                     for {} slt(dest, dEnd) {} {
                         mstore(dEnd, mload(sEnd))
                         sEnd := sub(sEnd, 32)
@@ -157,13 +159,17 @@ library LibBytes {
             }
         }
     }
-    
+
     /// @dev Returns a slices from a byte array.
     /// @param b The byte array to take a slice from.
     /// @param from The starting index for the slice (inclusive).
     /// @param to The final index for the slice (exclusive).
     /// @return result The slice containing bytes at indices [from, to)
-    function slice(bytes memory b, uint256 from, uint256 to)
+    function slice(
+        bytes memory b,
+        uint256 from,
+        uint256 to
+    )
         internal
         pure
         returns (bytes memory result)
@@ -192,7 +198,11 @@ library LibBytes {
     /// @param to The final index for the slice (exclusive).
     /// @return result The slice containing bytes at indices [from, to)
     /// @dev When `from == 0`, the original array will match the slice. In other cases its state will be corrupted.
-    function sliceDestructive(bytes memory b, uint256 from, uint256 to)
+    function sliceDestructive(
+        bytes memory b,
+        uint256 from,
+        uint256 to
+    )
         internal
         pure
         returns (bytes memory result)
@@ -344,7 +354,10 @@ library LibBytes {
             // 1. Add index to address of bytes array
             // 2. Load 32-byte word from memory
             // 3. Apply 12-byte mask to obtain extra bytes occupying word of memory where we'll store the address
-            let neighbors := and(mload(add(b, index)), 0xffffffffffffffffffffffff0000000000000000000000000000000000000000)
+            let neighbors := and(
+                mload(add(b, index)),
+                0xffffffffffffffffffffffff0000000000000000000000000000000000000000
+            )
             
             // Make sure input address is clean.
             // (Solidity does not guarantee this)
@@ -509,7 +522,7 @@ library LibBytes {
         // Assert length of <b> is valid, given
         // length of input
         require(
-            b.length >= index + 32 /* 32 bytes to store length */ + input.length,
+            b.length >= index + 32 + input.length,  // 32 bytes to store length
             "GREATER_OR_EQUAL_TO_NESTED_BYTES_LENGTH_REQUIRED"
         );
 
diff --git a/packages/contracts/src/2.0.0/utils/Ownable/IOwnable.sol b/packages/contracts/src/2.0.0/utils/Ownable/IOwnable.sol
index e77680903..116b8dc89 100644
--- a/packages/contracts/src/2.0.0/utils/Ownable/IOwnable.sol
+++ b/packages/contracts/src/2.0.0/utils/Ownable/IOwnable.sol
@@ -1,5 +1,4 @@
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 /*
  * Ownable
diff --git a/packages/contracts/src/2.0.0/utils/Ownable/Ownable.sol b/packages/contracts/src/2.0.0/utils/Ownable/Ownable.sol
index 489793a95..aca65aad2 100644
--- a/packages/contracts/src/2.0.0/utils/Ownable/Ownable.sol
+++ b/packages/contracts/src/2.0.0/utils/Ownable/Ownable.sol
@@ -1,5 +1,4 @@
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 /*
  * Ownable
diff --git a/packages/contracts/src/2.0.0/utils/SafeMath/SafeMath.sol b/packages/contracts/src/2.0.0/utils/SafeMath/SafeMath.sol
index ec0a3fe76..4413244db 100644
--- a/packages/contracts/src/2.0.0/utils/SafeMath/SafeMath.sol
+++ b/packages/contracts/src/2.0.0/utils/SafeMath/SafeMath.sol
@@ -1,28 +1,27 @@
-pragma solidity ^0.4.24;
-pragma experimental ABIEncoderV2;
+pragma solidity 0.4.24;
 
 
 contract SafeMath {
-    function safeMul(uint a, uint b)
+    function safeMul(uint256 a, uint256 b)
         internal
         pure
         returns (uint256)
     {
-        uint c = a * b;
+        uint256 c = a * b;
         assert(a == 0 || c / a == b);
         return c;
     }
 
-    function safeDiv(uint a, uint b)
+    function safeDiv(uint256 a, uint256 b)
         internal
         pure
         returns (uint256)
     {
-        uint c = a / b;
+        uint256 c = a / b;
         return c;
     }
 
-    function safeSub(uint a, uint b)
+    function safeSub(uint256 a, uint256 b)
         internal
         pure
         returns (uint256)
@@ -31,12 +30,12 @@ contract SafeMath {
         return a - b;
     }
 
-    function safeAdd(uint a, uint b)
+    function safeAdd(uint256 a, uint256 b)
         internal
         pure
         returns (uint256)
     {
-        uint c = a + b;
+        uint256 c = a + b;
         assert(c >= a);
         return c;
     }
diff --git a/packages/dev-utils/CHANGELOG.json b/packages/dev-utils/CHANGELOG.json
index 6c52bbf6b..56ecd023e 100644
--- a/packages/dev-utils/CHANGELOG.json
+++ b/packages/dev-utils/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1531149657,
+        "version": "0.4.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.4.4",
         "changes": [
diff --git a/packages/dev-utils/CHANGELOG.md b/packages/dev-utils/CHANGELOG.md
index af4a800cc..55e12b2dd 100644
--- a/packages/dev-utils/CHANGELOG.md
+++ b/packages/dev-utils/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.4.5 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.4.4 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/dev-utils/package.json b/packages/dev-utils/package.json
index 15f8d6ab0..1808e23e4 100644
--- a/packages/dev-utils/package.json
+++ b/packages/dev-utils/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/dev-utils",
-    "version": "0.4.4",
+    "version": "0.4.5",
     "engines": {
         "node": ">=6.12"
     },
@@ -30,8 +30,8 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/dev-utils/README.md",
     "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
         "chai": "^4.0.1",
@@ -45,12 +45,12 @@
         "typescript": "2.7.1"
     },
     "dependencies": {
-        "@0xproject/subproviders": "^0.10.4",
-        "@0xproject/types": "^0.8.1",
-        "@0xproject/utils": "^0.7.1",
+        "@0xproject/subproviders": "^0.10.5",
+        "@0xproject/types": "^0.8.2",
+        "@0xproject/utils": "^0.7.2",
         "ethereum-types": "^0.0.2",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/web3-wrapper": "^0.7.1",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/web3-wrapper": "^0.7.2",
         "lodash": "^4.17.4",
         "web3-provider-engine": "14.0.6"
     },
diff --git a/packages/fill-scenarios/CHANGELOG.json b/packages/fill-scenarios/CHANGELOG.json
index 822f8d5d5..cf36adf16 100644
--- a/packages/fill-scenarios/CHANGELOG.json
+++ b/packages/fill-scenarios/CHANGELOG.json
@@ -9,6 +9,15 @@
         ]
     },
     {
+        "timestamp": 1531149657,
+        "version": "0.0.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.0.4",
         "changes": [
diff --git a/packages/fill-scenarios/CHANGELOG.md b/packages/fill-scenarios/CHANGELOG.md
index e609fc88c..02618b89c 100644
--- a/packages/fill-scenarios/CHANGELOG.md
+++ b/packages/fill-scenarios/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.0.5 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.0.4 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/fill-scenarios/package.json b/packages/fill-scenarios/package.json
index 32b02947f..4e1ceeac0 100644
--- a/packages/fill-scenarios/package.json
+++ b/packages/fill-scenarios/package.json
@@ -28,10 +28,10 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/fill-scenarios/README.md",
     "devDependencies": {
-        "@0xproject/abi-gen": "^0.3.2",
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/sol-compiler": "^0.5.2",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/abi-gen": "^0.3.3",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/sol-compiler": "^0.5.3",
+        "@0xproject/tslint-config": "^0.4.21",
         "@types/lodash": "4.14.104",
         "copyfiles": "^1.2.0",
         "make-promises-safe": "^1.1.0",
@@ -41,13 +41,13 @@
         "typescript": "2.7.1"
     },
     "dependencies": {
-        "@0xproject/base-contract": "^0.3.4",
+        "@0xproject/base-contract": "^0.3.5",
         "@0xproject/order-utils": "^1.0.0",
         "@0xproject/types": "1.0.0",
         "ethereum-types": "^0.0.2",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
-        "@0xproject/web3-wrapper": "^0.7.1",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
+        "@0xproject/web3-wrapper": "^0.7.2",
         "ethers": "3.0.22",
         "lodash": "^4.17.4"
     },
diff --git a/packages/json-schemas/CHANGELOG.json b/packages/json-schemas/CHANGELOG.json
index dfefdfc77..42ef2065e 100644
--- a/packages/json-schemas/CHANGELOG.json
+++ b/packages/json-schemas/CHANGELOG.json
@@ -13,6 +13,15 @@
         ]
     },
     {
+        "timestamp": 1531149657,
+        "version": "0.8.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.8.1",
         "changes": [
diff --git a/packages/json-schemas/CHANGELOG.md b/packages/json-schemas/CHANGELOG.md
index 46a7c18cd..2524cd768 100644
--- a/packages/json-schemas/CHANGELOG.md
+++ b/packages/json-schemas/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.8.2 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.8.1 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/json-schemas/package.json b/packages/json-schemas/package.json
index f7c9d101b..8ecb41721 100644
--- a/packages/json-schemas/package.json
+++ b/packages/json-schemas/package.json
@@ -47,15 +47,15 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/json-schemas/README.md",
     "dependencies": {
-        "@0xproject/typescript-typings": "^0.4.1",
+        "@0xproject/typescript-typings": "^0.4.2",
         "@types/node": "^8.0.53",
         "jsonschema": "^1.2.0",
         "lodash.values": "^4.3.0"
     },
     "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
-        "@0xproject/utils": "^0.7.1",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
+        "@0xproject/utils": "^0.7.2",
         "@types/lodash.foreach": "^4.5.3",
         "@types/lodash.values": "^4.3.3",
         "@types/mocha": "^2.2.42",
diff --git a/packages/metacoin/package.json b/packages/metacoin/package.json
index 3fa79387e..9b96441c4 100644
--- a/packages/metacoin/package.json
+++ b/packages/metacoin/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/metacoin",
-    "version": "0.0.8",
+    "version": "0.0.9",
     "engines": {
         "node": ">=6.12"
     },
@@ -29,16 +29,16 @@
     "author": "",
     "license": "Apache-2.0",
     "dependencies": {
-        "@0xproject/abi-gen": "^0.3.2",
-        "@0xproject/base-contract": "^0.3.4",
-        "@0xproject/sol-compiler": "^0.5.2",
-        "@0xproject/sol-cov": "^0.1.1",
-        "@0xproject/subproviders": "^0.10.4",
-        "@0xproject/tslint-config": "^0.4.20",
-        "@0xproject/types": "^0.8.1",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
-        "@0xproject/web3-wrapper": "^0.7.1",
+        "@0xproject/abi-gen": "^0.3.3",
+        "@0xproject/base-contract": "^0.3.5",
+        "@0xproject/sol-compiler": "^0.5.3",
+        "@0xproject/sol-cov": "^0.1.2",
+        "@0xproject/subproviders": "^0.10.5",
+        "@0xproject/tslint-config": "^0.4.21",
+        "@0xproject/types": "^0.8.2",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
+        "@0xproject/web3-wrapper": "^0.7.2",
         "@types/mocha": "^5.2.2",
         "copyfiles": "^2.0.0",
         "ethereum-types": "^0.0.2",
@@ -48,7 +48,7 @@
         "web3-provider-engine": "14.0.6"
     },
     "devDependencies": {
-        "@0xproject/dev-utils": "^0.4.4",
+        "@0xproject/dev-utils": "^0.4.5",
         "chai": "^4.0.1",
         "chai-as-promised": "^7.1.0",
         "chai-bignumber": "^2.0.1",
diff --git a/packages/migrations/CHANGELOG.json b/packages/migrations/CHANGELOG.json
index 0eb67736e..9852eeb11 100644
--- a/packages/migrations/CHANGELOG.json
+++ b/packages/migrations/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1531149657,
+        "version": "0.0.9",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.0.8",
         "changes": [
diff --git a/packages/migrations/CHANGELOG.md b/packages/migrations/CHANGELOG.md
index a5445ce80..e97b1fdec 100644
--- a/packages/migrations/CHANGELOG.md
+++ b/packages/migrations/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.0.9 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.0.8 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/migrations/package.json b/packages/migrations/package.json
index 32accb57a..0b7ab8ae2 100644
--- a/packages/migrations/package.json
+++ b/packages/migrations/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/migrations",
-    "version": "0.0.8",
+    "version": "0.0.9",
     "engines": {
         "node": ">=6.12"
     },
@@ -37,10 +37,10 @@
     },
     "license": "Apache-2.0",
     "devDependencies": {
-        "@0xproject/abi-gen": "^0.3.2",
-        "@0xproject/dev-utils": "^0.4.4",
-        "@0xproject/tslint-config": "^0.4.20",
-        "@0xproject/types": "^0.8.1",
+        "@0xproject/abi-gen": "^0.3.3",
+        "@0xproject/dev-utils": "^0.4.5",
+        "@0xproject/tslint-config": "^0.4.21",
+        "@0xproject/types": "^0.8.2",
         "@types/yargs": "^10.0.0",
         "yargs": "^10.0.3",
         "make-promises-safe": "^1.1.0",
@@ -50,13 +50,13 @@
         "typescript": "2.7.1"
     },
     "dependencies": {
-        "@0xproject/base-contract": "^0.3.4",
+        "@0xproject/base-contract": "^0.3.5",
         "@0xproject/order-utils": "^1.0.0",
-        "@0xproject/sol-compiler": "^0.5.2",
-        "@0xproject/subproviders": "^0.10.4",
+        "@0xproject/sol-compiler": "^0.5.3",
+        "@0xproject/subproviders": "^0.10.5",
         "@0xproject/typescript-typings": "^0.4.2",
-        "@0xproject/utils": "^0.7.1",
-        "@0xproject/web3-wrapper": "^0.7.1",
+        "@0xproject/utils": "^0.7.2",
+        "@0xproject/web3-wrapper": "^0.7.2",
         "@ledgerhq/hw-app-eth": "^4.3.0",
         "ethereum-types": "^0.0.2",
         "ethers": "3.0.22",
diff --git a/packages/monorepo-scripts/CHANGELOG.json b/packages/monorepo-scripts/CHANGELOG.json
index 781704a8e..8cf8c60c6 100644
--- a/packages/monorepo-scripts/CHANGELOG.json
+++ b/packages/monorepo-scripts/CHANGELOG.json
@@ -1,6 +1,6 @@
 [
     {
-        "version": "0.2.2",
+        "version": "0.2.3",
         "changes": [
             {
                 "note": "Fix git remote tag removal step & add an additional sanity assertion",
@@ -9,6 +9,15 @@
         ]
     },
     {
+        "timestamp": 1531149657,
+        "version": "0.2.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.2.1",
         "changes": [
diff --git a/packages/monorepo-scripts/CHANGELOG.md b/packages/monorepo-scripts/CHANGELOG.md
index 7e5aadef0..aa3a06440 100644
--- a/packages/monorepo-scripts/CHANGELOG.md
+++ b/packages/monorepo-scripts/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.2.2 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.2.1 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/monorepo-scripts/package.json b/packages/monorepo-scripts/package.json
index 270b5d2c7..7ebe4fb84 100644
--- a/packages/monorepo-scripts/package.json
+++ b/packages/monorepo-scripts/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/monorepo-scripts",
-    "version": "0.2.1",
+    "version": "0.2.2",
     "engines": {
         "node": ">=6.12"
     },
diff --git a/packages/order-utils/CHANGELOG.json b/packages/order-utils/CHANGELOG.json
index 199ce2173..715d58a43 100644
--- a/packages/order-utils/CHANGELOG.json
+++ b/packages/order-utils/CHANGELOG.json
@@ -13,6 +13,15 @@
         ]
     },
     {
+        "timestamp": 1531149657,
+        "version": "0.0.8",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.0.7",
         "changes": [
diff --git a/packages/order-utils/CHANGELOG.md b/packages/order-utils/CHANGELOG.md
index 81b66373a..672affc19 100644
--- a/packages/order-utils/CHANGELOG.md
+++ b/packages/order-utils/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.0.8 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.0.7 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/order-utils/package.json b/packages/order-utils/package.json
index ce209561f..8f5041609 100644
--- a/packages/order-utils/package.json
+++ b/packages/order-utils/package.json
@@ -51,9 +51,9 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/order-utils/README.md",
     "devDependencies": {
-        "@0xproject/dev-utils": "^0.4.4",
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/dev-utils": "^0.4.5",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
         "@types/ethereumjs-abi": "^0.6.0",
         "@types/bn.js": "^4.11.0",
         "@types/lodash": "4.14.104",
@@ -73,13 +73,13 @@
     },
     "dependencies": {
         "@0xproject/assert": "^0.3.0",
-        "@0xproject/base-contract": "^0.3.4",
+        "@0xproject/base-contract": "^0.3.5",
         "@0xproject/json-schemas": "1.0.0",
-        "@0xproject/sol-compiler": "^0.5.2",
+        "@0xproject/sol-compiler": "^0.5.3",
         "@0xproject/types": "^1.0.0",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
-        "@0xproject/web3-wrapper": "^0.7.1",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
+        "@0xproject/web3-wrapper": "^0.7.2",
         "@types/node": "^8.0.53",
         "bn.js": "^4.11.8",
         "ethereum-types": "^0.0.2",
diff --git a/packages/order-watcher/CHANGELOG.json b/packages/order-watcher/CHANGELOG.json
index 6104fc81c..a66db6eec 100644
--- a/packages/order-watcher/CHANGELOG.json
+++ b/packages/order-watcher/CHANGELOG.json
@@ -10,7 +10,8 @@
                 "note": "Do not stop subscription if error is encountered",
                 "pr": 825
             }
-        ]
+        ],
+        "timestamp": 1531149657
     },
     {
         "timestamp": 1529397769,
diff --git a/packages/order-watcher/CHANGELOG.md b/packages/order-watcher/CHANGELOG.md
index 5e216f90c..c14b66e39 100644
--- a/packages/order-watcher/CHANGELOG.md
+++ b/packages/order-watcher/CHANGELOG.md
@@ -5,6 +5,11 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.0.7 - _July 9, 2018_
+
+    * Switch out simple getLogs polling with ethereumjs-blockstream (#825)
+    * Do not stop subscription if error is encountered (#825)
+
 ## v0.0.6 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/order-watcher/package.json b/packages/order-watcher/package.json
index 44748ddf9..27d64a371 100644
--- a/packages/order-watcher/package.json
+++ b/packages/order-watcher/package.json
@@ -47,12 +47,12 @@
         "node": ">=6.0.0"
     },
     "devDependencies": {
-        "@0xproject/abi-gen": "^0.3.2",
-        "@0xproject/dev-utils": "^0.4.4",
-        "@0xproject/migrations": "^0.0.8",
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/sol-compiler": "^0.5.2",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/abi-gen": "^0.3.3",
+        "@0xproject/dev-utils": "^0.4.5",
+        "@0xproject/migrations": "^0.0.9",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/sol-compiler": "^0.5.3",
+        "@0xproject/tslint-config": "^0.4.21",
         "@types/bintrees": "^1.0.2",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
@@ -77,16 +77,16 @@
         "typescript": "2.7.1"
     },
     "dependencies": {
-        "@0xproject/assert": "0.2.12",
-        "@0xproject/base-contract": "^0.3.4",
+        "@0xproject/assert": "0.2.13",
+        "@0xproject/base-contract": "^0.3.5",
         "@0xproject/contract-wrappers": "0.0.5",
-        "@0xproject/fill-scenarios": "^0.0.4",
-        "@0xproject/json-schemas": "0.8.1",
-        "@0xproject/order-utils": "^0.0.7",
-        "@0xproject/types": "^0.8.1",
-        "@0xproject/typescript-typings": "^0.4.1",
+        "@0xproject/fill-scenarios": "^0.0.5",
+        "@0xproject/json-schemas": "0.8.2",
+        "@0xproject/order-utils": "^0.0.8",
+        "@0xproject/types": "^0.8.2",
+        "@0xproject/typescript-typings": "^0.4.2",
         "@0xproject/utils": "^0.7.2",
-        "@0xproject/web3-wrapper": "^0.7.1",
+        "@0xproject/web3-wrapper": "^0.7.2",
         "ethereumjs-blockstream": "5.0.0",
         "ethereum-types": "^0.0.2",
         "bintrees": "^1.0.2",
diff --git a/packages/react-docs-example/package.json b/packages/react-docs-example/package.json
index 3a743df77..6fd9aca22 100644
--- a/packages/react-docs-example/package.json
+++ b/packages/react-docs-example/package.json
@@ -1,7 +1,7 @@
 {
     "private": true,
     "name": "@0xproject/react-docs-example",
-    "version": "0.0.13",
+    "version": "0.0.14",
     "engines": {
         "node": ">=6.12"
     },
@@ -26,7 +26,7 @@
         "url": "https://github.com/0xProject/0x-monorepo.git"
     },
     "devDependencies": {
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/tslint-config": "^0.4.21",
         "@types/lodash": "4.14.104",
         "@types/material-ui": "0.18.0",
         "@types/node": "^8.0.53",
@@ -50,7 +50,7 @@
         "webpack-dev-server": "^2.11.1"
     },
     "dependencies": {
-        "@0xproject/react-docs": "^0.0.14",
+        "@0xproject/react-docs": "^0.0.15",
         "basscss": "^8.0.3",
         "lodash": "^4.17.4",
         "material-ui": "^0.17.1",
diff --git a/packages/react-docs/CHANGELOG.json b/packages/react-docs/CHANGELOG.json
index 30e48197d..c6ee9510c 100644
--- a/packages/react-docs/CHANGELOG.json
+++ b/packages/react-docs/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1531149657,
+        "version": "0.0.15",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.0.14",
         "changes": [
diff --git a/packages/react-docs/CHANGELOG.md b/packages/react-docs/CHANGELOG.md
index fcbf3698b..c438a535a 100644
--- a/packages/react-docs/CHANGELOG.md
+++ b/packages/react-docs/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.0.15 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.0.14 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/react-docs/package.json b/packages/react-docs/package.json
index 8c70f4f6d..5fe493457 100644
--- a/packages/react-docs/package.json
+++ b/packages/react-docs/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/react-docs",
-    "version": "0.0.14",
+    "version": "0.0.15",
     "engines": {
         "node": ">=6.12"
     },
@@ -25,9 +25,9 @@
         "url": "https://github.com/0xProject/0x-monorepo.git"
     },
     "devDependencies": {
-        "@0xproject/dev-utils": "^0.4.4",
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/dev-utils": "^0.4.5",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
         "@types/compare-versions": "^3.0.0",
         "copyfiles": "^1.2.0",
         "make-promises-safe": "^1.1.0",
@@ -36,8 +36,8 @@
         "typescript": "2.7.1"
     },
     "dependencies": {
-        "@0xproject/react-shared": "^0.2.1",
-        "@0xproject/utils": "^0.7.1",
+        "@0xproject/react-shared": "^0.2.2",
+        "@0xproject/utils": "^0.7.2",
         "@types/lodash": "4.14.104",
         "@types/material-ui": "0.18.0",
         "@types/node": "^8.0.53",
diff --git a/packages/react-shared/CHANGELOG.json b/packages/react-shared/CHANGELOG.json
index deee2c6e6..f05207c0c 100644
--- a/packages/react-shared/CHANGELOG.json
+++ b/packages/react-shared/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1531149657,
+        "version": "0.2.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.2.1",
         "changes": [
diff --git a/packages/react-shared/CHANGELOG.md b/packages/react-shared/CHANGELOG.md
index b28923eec..5b3b16f37 100644
--- a/packages/react-shared/CHANGELOG.md
+++ b/packages/react-shared/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.2.2 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.2.1 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/react-shared/package.json b/packages/react-shared/package.json
index b2ba67ed3..52c37d924 100644
--- a/packages/react-shared/package.json
+++ b/packages/react-shared/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/react-shared",
-    "version": "0.2.1",
+    "version": "0.2.2",
     "engines": {
         "node": ">=6.12"
     },
@@ -25,9 +25,9 @@
         "url": "https://github.com/0xProject/0x-monorepo.git"
     },
     "devDependencies": {
-        "@0xproject/dev-utils": "^0.4.4",
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/dev-utils": "^0.4.5",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
         "copyfiles": "^1.2.0",
         "make-promises-safe": "^1.1.0",
         "shx": "^0.2.2",
diff --git a/packages/sol-compiler/CHANGELOG.json b/packages/sol-compiler/CHANGELOG.json
index bb1a5f006..c96efcd89 100644
--- a/packages/sol-compiler/CHANGELOG.json
+++ b/packages/sol-compiler/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1531149657,
+        "version": "0.5.3",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.5.2",
         "changes": [
diff --git a/packages/sol-compiler/CHANGELOG.md b/packages/sol-compiler/CHANGELOG.md
index 524a361de..1a69a1c8e 100644
--- a/packages/sol-compiler/CHANGELOG.md
+++ b/packages/sol-compiler/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.5.3 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.5.2 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/sol-compiler/package.json b/packages/sol-compiler/package.json
index d5a2e6e77..e738ab56b 100644
--- a/packages/sol-compiler/package.json
+++ b/packages/sol-compiler/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/sol-compiler",
-    "version": "0.5.2",
+    "version": "0.5.3",
     "engines": {
         "node": ">=6.12"
     },
@@ -53,9 +53,9 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/sol-compiler/README.md",
     "devDependencies": {
-        "@0xproject/dev-utils": "^0.4.4",
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/dev-utils": "^0.4.5",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
         "@types/mkdirp": "^0.5.2",
         "@types/require-from-string": "^1.2.0",
         "@types/semver": "^5.5.0",
@@ -76,13 +76,13 @@
         "zeppelin-solidity": "1.8.0"
     },
     "dependencies": {
-        "@0xproject/assert": "0.2.12",
-        "@0xproject/json-schemas": "0.8.1",
-        "@0xproject/sol-resolver": "^0.0.7",
-        "@0xproject/types": "^0.8.1",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
-        "@0xproject/web3-wrapper": "^0.7.1",
+        "@0xproject/assert": "0.2.13",
+        "@0xproject/json-schemas": "0.8.2",
+        "@0xproject/sol-resolver": "^0.0.8",
+        "@0xproject/types": "^0.8.2",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
+        "@0xproject/web3-wrapper": "^0.7.2",
         "@types/yargs": "^11.0.0",
         "ethereum-types": "^0.0.2",
         "chalk": "^2.3.0",
diff --git a/packages/sol-cov/CHANGELOG.json b/packages/sol-cov/CHANGELOG.json
index 3b6071801..8a622162f 100644
--- a/packages/sol-cov/CHANGELOG.json
+++ b/packages/sol-cov/CHANGELOG.json
@@ -77,6 +77,15 @@
         ]
     },
     {
+        "timestamp": 1531149657,
+        "version": "0.1.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.1.1",
         "changes": [
diff --git a/packages/sol-cov/CHANGELOG.md b/packages/sol-cov/CHANGELOG.md
index d8f7c5310..0ed77253e 100644
--- a/packages/sol-cov/CHANGELOG.md
+++ b/packages/sol-cov/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.1.2 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.1.1 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/sol-cov/package.json b/packages/sol-cov/package.json
index 483500ca9..8553da7a4 100644
--- a/packages/sol-cov/package.json
+++ b/packages/sol-cov/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/sol-cov",
-    "version": "0.1.1",
+    "version": "0.1.2",
     "engines": {
         "node": ">=6.12"
     },
@@ -50,12 +50,12 @@
     },
     "homepage": "https://github.com/0xProject/0x.js/packages/sol-cov/README.md",
     "dependencies": {
-        "@0xproject/sol-compiler": "^0.5.2",
-        "@0xproject/subproviders": "^0.10.4",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
-        "@0xproject/web3-wrapper": "^0.7.1",
-        "@0xproject/dev-utils": "^0.4.4",
+        "@0xproject/sol-compiler": "^0.5.3",
+        "@0xproject/subproviders": "^0.10.5",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
+        "@0xproject/web3-wrapper": "^0.7.2",
+        "@0xproject/dev-utils": "^0.4.5",
         "ethereum-types": "^0.0.2",
         "ethereumjs-util": "^5.1.1",
         "glob": "^7.1.2",
diff --git a/packages/sol-resolver/CHANGELOG.json b/packages/sol-resolver/CHANGELOG.json
index 99c1387d1..1e39c1b39 100644
--- a/packages/sol-resolver/CHANGELOG.json
+++ b/packages/sol-resolver/CHANGELOG.json
@@ -1,6 +1,6 @@
 [
     {
-        "version": "0.0.8",
+        "version": "0.0.9",
         "changes": [
             {
                 "note": "Fix a bug in FsResolver where it tries to read directories as files",
@@ -13,6 +13,15 @@
         ]
     },
     {
+        "timestamp": 1531149657,
+        "version": "0.0.8",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.0.7",
         "changes": [
diff --git a/packages/sol-resolver/CHANGELOG.md b/packages/sol-resolver/CHANGELOG.md
index 514121ee1..ecfff34e3 100644
--- a/packages/sol-resolver/CHANGELOG.md
+++ b/packages/sol-resolver/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.0.8 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.0.7 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/sol-resolver/package.json b/packages/sol-resolver/package.json
index ae36648e9..715b19d0e 100644
--- a/packages/sol-resolver/package.json
+++ b/packages/sol-resolver/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/sol-resolver",
-    "version": "0.0.7",
+    "version": "0.0.8",
     "engines": {
         "node": ">=6.12"
     },
@@ -24,8 +24,8 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/resolver/README.md",
     "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
         "copyfiles": "^1.2.0",
         "make-promises-safe": "^1.1.0",
         "shx": "^0.2.2",
@@ -33,7 +33,7 @@
         "typescript": "2.7.1"
     },
     "dependencies": {
-        "@0xproject/types": "^0.8.1",
+        "@0xproject/types": "^0.8.2",
         "@0xproject/typescript-typings": "^0.0.3",
         "lodash": "^4.17.4"
     },
diff --git a/packages/sra-report/CHANGELOG.json b/packages/sra-report/CHANGELOG.json
index d4ca1aebb..1a90331c7 100644
--- a/packages/sra-report/CHANGELOG.json
+++ b/packages/sra-report/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1531149657,
+        "version": "0.1.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.1.4",
         "changes": [
diff --git a/packages/sra-report/CHANGELOG.md b/packages/sra-report/CHANGELOG.md
index 8acda5aa5..8831789ac 100644
--- a/packages/sra-report/CHANGELOG.md
+++ b/packages/sra-report/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.1.5 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.1.4 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/sra-report/package.json b/packages/sra-report/package.json
index 4bd0a4800..29a2dcfcb 100644
--- a/packages/sra-report/package.json
+++ b/packages/sra-report/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/sra-report",
-    "version": "0.1.4",
+    "version": "0.1.5",
     "engines": {
         "node": ">=6.12"
     },
@@ -36,20 +36,20 @@
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/sra-report/README.md",
     "dependencies": {
         "@0xproject/assert": "^0.3.0",
-        "@0xproject/types": "^0.8.1",
-        "@0xproject/order-utils": "^0.0.7",
-        "@0xproject/connect": "0.6.15",
-        "@0xproject/json-schemas": "0.8.1",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
+        "@0xproject/types": "^0.8.2",
+        "@0xproject/order-utils": "^0.0.8",
+        "@0xproject/connect": "0.6.16",
+        "@0xproject/json-schemas": "0.8.2",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
         "chalk": "^2.3.0",
         "lodash": "^4.17.4",
         "newman": "^3.9.3",
         "yargs": "^10.0.3"
     },
     "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.48",
         "@types/nock": "^9.1.2",
diff --git a/packages/subproviders/CHANGELOG.json b/packages/subproviders/CHANGELOG.json
index c4dca2864..7a3f29fe0 100644
--- a/packages/subproviders/CHANGELOG.json
+++ b/packages/subproviders/CHANGELOG.json
@@ -5,7 +5,8 @@
             {
                 "note": "Add `EthLightwalletSubprovider`"
             }
-        ]
+        ],
+        "timestamp": 1531149657
     },
     {
         "timestamp": 1529397769,
diff --git a/packages/subproviders/CHANGELOG.md b/packages/subproviders/CHANGELOG.md
index 855524e4a..6fab0a4c4 100644
--- a/packages/subproviders/CHANGELOG.md
+++ b/packages/subproviders/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.10.5 - _July 9, 2018_
+
+    * Update web3-provider-engine to v14.0.6 including the leaked global.XMLHttpRequest bug fix
+
 ## v0.10.4 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/subproviders/package.json b/packages/subproviders/package.json
index a5886cbb2..bdc846e6b 100644
--- a/packages/subproviders/package.json
+++ b/packages/subproviders/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/subproviders",
-    "version": "0.10.4",
+    "version": "0.10.5",
     "engines": {
         "node": ">=6.12"
     },
@@ -42,9 +42,9 @@
     "dependencies": {
         "@0xproject/assert": "^0.3.0",
         "@0xproject/types": "^1.0.0",
-        "@0xproject/web3-wrapper": "^0.7.1",
+        "@0xproject/web3-wrapper": "^0.7.2",
         "@0xproject/typescript-typings": "^0.4.2",
-        "@0xproject/utils": "^0.7.1",
+        "@0xproject/utils": "^0.7.2",
         "@ledgerhq/hw-app-eth": "^4.3.0",
         "@ledgerhq/hw-transport-u2f": "^4.3.0",
         "ethereum-types": "^0.0.2",
@@ -60,9 +60,9 @@
         "web3-provider-engine": "14.0.6"
     },
     "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
-        "@0xproject/utils": "^0.7.1",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
+        "@0xproject/utils": "^0.7.2",
         "@types/bip39": "^2.4.0",
         "@types/bn.js": "^4.11.0",
         "@types/hdkey": "^0.7.0",
diff --git a/packages/subproviders/src/subproviders/signer.ts b/packages/subproviders/src/subproviders/signer.ts
index 08a9daceb..f7329e00c 100644
--- a/packages/subproviders/src/subproviders/signer.ts
+++ b/packages/subproviders/src/subproviders/signer.ts
@@ -1,4 +1,4 @@
-import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import { marshaller, Web3Wrapper } from '@0xproject/web3-wrapper';
 import { JSONRPCRequestPayload, Provider } from 'ethereum-types';
 
 import { Callback, ErrorCallback } from '../types';
@@ -51,7 +51,8 @@ export class SignerSubprovider extends Subprovider {
             case 'eth_sendTransaction':
                 const [txParams] = payload.params;
                 try {
-                    const txHash = await this._web3Wrapper.sendTransactionAsync(txParams);
+                    const txData = marshaller.unmarshalTxData(txParams);
+                    const txHash = await this._web3Wrapper.sendTransactionAsync(txData);
                     end(null, txHash);
                 } catch (err) {
                     end(err);
diff --git a/packages/testnet-faucets/package.json b/packages/testnet-faucets/package.json
index 5acd4ae35..72ab8f61b 100644
--- a/packages/testnet-faucets/package.json
+++ b/packages/testnet-faucets/package.json
@@ -1,7 +1,7 @@
 {
     "private": true,
     "name": "@0xproject/testnet-faucets",
-    "version": "1.0.34",
+    "version": "1.0.35",
     "engines": {
         "node": ">=6.12"
     },
@@ -19,10 +19,10 @@
     "license": "Apache-2.0",
     "dependencies": {
         "0x.js": "^0.38.0",
-        "@0xproject/subproviders": "^0.10.4",
-        "@0xproject/web3-wrapper": "^0.7.1",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
+        "@0xproject/subproviders": "^0.10.5",
+        "@0xproject/web3-wrapper": "^0.7.2",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
         "body-parser": "^1.17.1",
         "ethereumjs-tx": "^1.3.5",
         "ethereumjs-util": "^5.1.1",
@@ -32,7 +32,7 @@
         "web3-provider-engine": "14.0.6"
     },
     "devDependencies": {
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/tslint-config": "^0.4.21",
         "@types/body-parser": "^1.16.1",
         "@types/express": "^4.0.35",
         "@types/lodash": "4.14.104",
diff --git a/packages/tslint-config/CHANGELOG.json b/packages/tslint-config/CHANGELOG.json
index ffb0c4e81..f2a3456f4 100644
--- a/packages/tslint-config/CHANGELOG.json
+++ b/packages/tslint-config/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1531149657,
+        "version": "0.4.21",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.4.20",
         "changes": [
diff --git a/packages/tslint-config/CHANGELOG.md b/packages/tslint-config/CHANGELOG.md
index 2a862f8e1..88e17b694 100644
--- a/packages/tslint-config/CHANGELOG.md
+++ b/packages/tslint-config/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.4.21 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.4.20 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/tslint-config/package.json b/packages/tslint-config/package.json
index 9cb6a2da0..356499f6b 100644
--- a/packages/tslint-config/package.json
+++ b/packages/tslint-config/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/tslint-config",
-    "version": "0.4.20",
+    "version": "0.4.21",
     "engines": {
         "node": ">=6.12"
     },
@@ -34,7 +34,7 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/tslint-config/README.md",
     "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.2.1",
+        "@0xproject/monorepo-scripts": "^0.2.2",
         "@types/lodash": "4.14.104",
         "copyfiles": "^1.2.0",
         "make-promises-safe": "^1.1.0",
diff --git a/packages/types/CHANGELOG.json b/packages/types/CHANGELOG.json
index 36be06d0f..ea3b49c8a 100644
--- a/packages/types/CHANGELOG.json
+++ b/packages/types/CHANGELOG.json
@@ -14,6 +14,15 @@
         ]
     },
     {
+        "timestamp": 1531149657,
+        "version": "0.8.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.8.1",
         "changes": [
diff --git a/packages/types/CHANGELOG.md b/packages/types/CHANGELOG.md
index aa3ba5eab..d235e31b7 100644
--- a/packages/types/CHANGELOG.md
+++ b/packages/types/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.8.2 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.8.1 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/types/package.json b/packages/types/package.json
index f79b558fa..b5e09d42e 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -24,8 +24,8 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/types/README.md",
     "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
         "copyfiles": "^1.2.0",
         "make-promises-safe": "^1.1.0",
         "shx": "^0.2.2",
diff --git a/packages/types/src/index.ts b/packages/types/src/index.ts
index 3b71366f5..03fa2fe8a 100644
--- a/packages/types/src/index.ts
+++ b/packages/types/src/index.ts
@@ -158,7 +158,6 @@ export interface ECSignature {
 }
 
 export enum AssetProxyId {
-    INVALID = '0x00000000',
     ERC20 = '0xf47261b0',
     ERC721 = '0x08e937fa',
 }
diff --git a/packages/typescript-typings/CHANGELOG.json b/packages/typescript-typings/CHANGELOG.json
index 1d4230783..813da155e 100644
--- a/packages/typescript-typings/CHANGELOG.json
+++ b/packages/typescript-typings/CHANGELOG.json
@@ -27,9 +27,11 @@
             {
                 "note": "Dependencies updated"
             }
-        ]
+        ],
+        "timestamp": 1531149657
     },
     {
+        "timestamp": 1529397769,
         "version": "0.4.0",
         "changes": [
             {
diff --git a/packages/typescript-typings/CHANGELOG.md b/packages/typescript-typings/CHANGELOG.md
index a34ff86e1..26d54716c 100644
--- a/packages/typescript-typings/CHANGELOG.md
+++ b/packages/typescript-typings/CHANGELOG.md
@@ -5,9 +5,16 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
-## v0.4.1 - _June 19, 2018_
+## v0.4.2 - _July 9, 2018_
 
-    * Dependencies updated
+    * Improve 'web3-provider-engine' typings (#768)
+    * Additional error type for `ethers.js` (#763)
+
+## v0.4.0 - _June 19, 2018_
+
+    * Add types for `react-joyride`
+    * Add types for `react-popper`, remove types for `react-joyride`
+    * Remove types for blockies, bn.js, compare-versions, ethereumjs-abi, ethereumjs-tx, find-versions, hdkey, is-mobile, solidity-parser-antlr, xml-js as they were moved to DefinitelyTyped (#641)
 
 ## v0.4.0 - _June 1, 2018_
 
diff --git a/packages/typescript-typings/package.json b/packages/typescript-typings/package.json
index e3f226294..6bd533676 100644
--- a/packages/typescript-typings/package.json
+++ b/packages/typescript-typings/package.json
@@ -29,7 +29,7 @@
         "bignumber.js": "~4.1.0"
     },
     "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.2.1",
+        "@0xproject/monorepo-scripts": "^0.2.2",
         "copyfiles": "^1.2.0",
         "shx": "^0.2.2"
     },
diff --git a/packages/utils/CHANGELOG.json b/packages/utils/CHANGELOG.json
index a27216be7..0ac49952b 100644
--- a/packages/utils/CHANGELOG.json
+++ b/packages/utils/CHANGELOG.json
@@ -13,7 +13,8 @@
                 "note": "Fixes uncaught Error in abi_decoder",
                 "pr": 763
             }
-        ]
+        ],
+        "timestamp": 1531149657
     },
     {
         "timestamp": 1529397769,
diff --git a/packages/utils/CHANGELOG.md b/packages/utils/CHANGELOG.md
index 60a575297..e2464232c 100644
--- a/packages/utils/CHANGELOG.md
+++ b/packages/utils/CHANGELOG.md
@@ -5,6 +5,12 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.7.2 - _July 9, 2018_
+
+    * Added errorUtils.spawnSwitchErr
+    * Add logUtils.warn (#589)
+    * Fixes uncaught Error in abi_decoder (#763)
+
 ## v0.7.1 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/utils/package.json b/packages/utils/package.json
index 0ba7a7ba4..9168a3538 100644
--- a/packages/utils/package.json
+++ b/packages/utils/package.json
@@ -24,8 +24,8 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/utils/README.md",
     "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
         "@types/lodash": "4.14.104",
         "copyfiles": "^1.2.0",
         "make-promises-safe": "^1.1.0",
@@ -40,6 +40,8 @@
         "@types/node": "^8.0.53",
         "ethereumjs-util": "^5.1.1",
         "bignumber.js": "~4.1.0",
+        "ethereum-types": "^0.0.2",
+        "ethereumjs-util": "^5.1.1",
         "ethers": "3.0.22",
         "js-sha3": "^0.7.0",
         "lodash": "^4.17.4"
diff --git a/packages/web3-wrapper/CHANGELOG.json b/packages/web3-wrapper/CHANGELOG.json
index f8b1dab85..0b83ad13d 100644
--- a/packages/web3-wrapper/CHANGELOG.json
+++ b/packages/web3-wrapper/CHANGELOG.json
@@ -1,15 +1,27 @@
 [
     {
-        "timestamp": 1529397769,
-        "version": "0.7.2",
+        "version": "0.7.3",
         "changes": [
             {
+                "note": "Export `marshaller` utility file.",
+                "pr": 829
+            },
+            {
                 "note": "Add `getNodeTypeAsync` method",
                 "pr": 812
             }
         ]
     },
     {
+        "timestamp": 1531149657,
+        "version": "0.7.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1529397769,
         "version": "0.7.1",
         "changes": [
diff --git a/packages/web3-wrapper/CHANGELOG.md b/packages/web3-wrapper/CHANGELOG.md
index 1ac36a316..f6795100e 100644
--- a/packages/web3-wrapper/CHANGELOG.md
+++ b/packages/web3-wrapper/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.7.2 - _July 9, 2018_
+
+    * Dependencies updated
+
 ## v0.7.1 - _June 19, 2018_
 
     * Dependencies updated
diff --git a/packages/web3-wrapper/package.json b/packages/web3-wrapper/package.json
index 21455f67a..9716be5bf 100644
--- a/packages/web3-wrapper/package.json
+++ b/packages/web3-wrapper/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/web3-wrapper",
-    "version": "0.7.1",
+    "version": "0.7.2",
     "engines": {
         "node": ">=6.12"
     },
@@ -45,8 +45,8 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/web3-wrapper/README.md",
     "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.2.1",
-        "@0xproject/tslint-config": "^0.4.20",
+        "@0xproject/monorepo-scripts": "^0.2.2",
+        "@0xproject/tslint-config": "^0.4.21",
         "@types/lodash": "4.14.104",
         "chai": "^4.0.1",
         "chai-as-promised": "^7.1.0",
@@ -66,8 +66,8 @@
     "dependencies": {
         "@0xproject/assert": "0.3.0",
         "@0xproject/json-schemas": "^1.0.0",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
         "ethereum-types": "^0.0.2",
         "ethereumjs-util": "^5.1.1",
         "ethers": "3.0.22",
diff --git a/packages/web3-wrapper/src/index.ts b/packages/web3-wrapper/src/index.ts
index 66ef0a784..19fe0836c 100644
--- a/packages/web3-wrapper/src/index.ts
+++ b/packages/web3-wrapper/src/index.ts
@@ -1,2 +1,3 @@
 export { Web3Wrapper, uniqueVersionIds, NodeType } from './web3_wrapper';
 export { Web3WrapperErrors } from './types';
+export { marshaller } from './marshaller';
diff --git a/packages/web3-wrapper/src/marshaller.ts b/packages/web3-wrapper/src/marshaller.ts
index e9fd35a11..15384417e 100644
--- a/packages/web3-wrapper/src/marshaller.ts
+++ b/packages/web3-wrapper/src/marshaller.ts
@@ -73,6 +73,19 @@ export const marshaller = {
         };
         return tx;
     },
+    unmarshalTxData(txDataRpc: TxDataRPC): TxData {
+        if (_.isUndefined(txDataRpc.from)) {
+            throw new Error(`txData must include valid 'from' value.`);
+        }
+        const txData = {
+            ...txDataRpc,
+            value: !_.isUndefined(txDataRpc.value) ? utils.convertHexToNumber(txDataRpc.value) : undefined,
+            gas: !_.isUndefined(txDataRpc.gas) ? utils.convertHexToNumber(txDataRpc.gas) : undefined,
+            gasPrice: !_.isUndefined(txDataRpc.gasPrice) ? utils.convertHexToNumber(txDataRpc.gasPrice) : undefined,
+            nonce: !_.isUndefined(txDataRpc.nonce) ? utils.convertHexToNumber(txDataRpc.nonce) : undefined,
+        };
+        return txData;
+    },
     marshalTxData(txData: Partial<TxData>): Partial<TxDataRPC> {
         if (_.isUndefined(txData.from)) {
             throw new Error(`txData must include valid 'from' value.`);
diff --git a/packages/website/package.json b/packages/website/package.json
index a5768a60b..a3ca047fa 100644
--- a/packages/website/package.json
+++ b/packages/website/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/website",
-    "version": "0.0.37",
+    "version": "0.0.38",
     "engines": {
         "node": ">=6.12"
     },
@@ -19,13 +19,14 @@
     "license": "Apache-2.0",
     "dependencies": {
         "@0xproject/contract-wrappers": "^0.0.5",
-        "@0xproject/react-docs": "^0.0.14",
-        "@0xproject/react-shared": "^0.2.1",
-        "@0xproject/subproviders": "^0.10.4",
+        "@0xproject/order-utils": "^0.0.8",
+        "@0xproject/react-docs": "^0.0.15",
+        "@0xproject/react-shared": "^0.2.2",
+        "@0xproject/subproviders": "^0.10.5",
         "@0xproject/types": "^0.8.1",
-        "@0xproject/typescript-typings": "^0.4.1",
-        "@0xproject/utils": "^0.7.1",
-        "@0xproject/web3-wrapper": "^0.7.1",
+        "@0xproject/typescript-typings": "^0.4.2",
+        "@0xproject/utils": "^0.7.2",
+        "@0xproject/web3-wrapper": "^0.7.2",
         "accounting": "^0.4.1",
         "basscss": "^8.0.3",
         "blockies": "^0.0.2",
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index 9cd23b10e..9cd23b10e 100644
--- a/packages/website/public/images/token_icons/firstblood.jpg
+++ b/packages/website/public/images/token_icons/1ST.png
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new file mode 100644
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new file mode 100644
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diff --git a/packages/website/public/images/token_icons/AE.png b/packages/website/public/images/token_icons/AE.png
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diff --git a/packages/website/public/images/token_icons/AION.png b/packages/website/public/images/token_icons/AION.png
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diff --git a/packages/website/public/images/token_icons/AIR.png b/packages/website/public/images/token_icons/AIR.png
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new file mode 100644
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new file mode 100644
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new file mode 100644
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+++ b/packages/website/public/images/token_icons/AST.png
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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index 1daf28d00..1daf28d00 100644
--- a/packages/website/public/images/token_icons/civic.png
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new file mode 100644
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new file mode 100644
index 000000000..b4ac550f6
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diff --git a/packages/website/public/images/token_icons/edgeless.png b/packages/website/public/images/token_icons/EDG.png
index 606784154..606784154 100644
--- a/packages/website/public/images/token_icons/edgeless.png
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diff --git a/packages/website/public/images/token_icons/EDU.png b/packages/website/public/images/token_icons/EDU.png
new file mode 100644
index 000000000..d74785e5a
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diff --git a/packages/website/public/images/token_icons/ELEC.png b/packages/website/public/images/token_icons/ELEC.png
new file mode 100644
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diff --git a/packages/website/public/images/token_icons/EMONT.png b/packages/website/public/images/token_icons/EMONT.png
new file mode 100644
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diff --git a/packages/website/public/images/token_icons/ENG.png b/packages/website/public/images/token_icons/ENG.png
new file mode 100644
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diff --git a/packages/website/public/images/token_icons/ENTR.png b/packages/website/public/images/token_icons/ENTR.png
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diff --git a/packages/website/public/images/token_icons/GET.png b/packages/website/public/images/token_icons/GET.png
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diff --git a/packages/website/public/images/token_icons/golem.png b/packages/website/public/images/token_icons/GNT.png
index e61a4367d..e61a4367d 100644
--- a/packages/website/public/images/token_icons/golem.png
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new file mode 100644
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diff --git a/packages/website/public/images/token_icons/HOT.png b/packages/website/public/images/token_icons/HOT.png
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new file mode 100644
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diff --git a/packages/website/public/images/token_icons/IND.png b/packages/website/public/images/token_icons/IND.png
new file mode 100644
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diff --git a/packages/website/public/images/token_icons/J8T.png b/packages/website/public/images/token_icons/J8T.png
new file mode 100644
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diff --git a/packages/website/public/images/token_icons/JET.png b/packages/website/public/images/token_icons/JET.png
new file mode 100644
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diff --git a/packages/website/public/images/token_icons/KIN.png b/packages/website/public/images/token_icons/KIN.png
new file mode 100644
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diff --git a/packages/website/public/images/token_icons/KNC.png b/packages/website/public/images/token_icons/KNC.png
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diff --git a/packages/website/public/images/token_icons/LINK.png b/packages/website/public/images/token_icons/LINK.png
new file mode 100644
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diff --git a/packages/website/public/images/token_icons/SNT.png b/packages/website/public/images/token_icons/SNT.png
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diff --git a/packages/website/public/images/token_icons/SPANK.png b/packages/website/public/images/token_icons/SPANK.png
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diff --git a/packages/website/public/images/token_icons/SPN.png b/packages/website/public/images/token_icons/SPN.png
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diff --git a/packages/website/public/images/token_icons/SS.png b/packages/website/public/images/token_icons/SS.png
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diff --git a/packages/website/public/images/token_icons/SUB.png b/packages/website/public/images/token_icons/SUB.png
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diff --git a/packages/website/public/images/token_icons/SWT.png b/packages/website/public/images/token_icons/SWT.png
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diff --git a/packages/website/public/images/token_icons/TIME.png b/packages/website/public/images/token_icons/TIME.png
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diff --git a/packages/website/public/images/token_icons/TKN.png b/packages/website/public/images/token_icons/TKN.png
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diff --git a/packages/website/public/images/token_icons/TRL.png b/packages/website/public/images/token_icons/TRL.png
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diff --git a/packages/website/public/images/token_icons/TRST.png b/packages/website/public/images/token_icons/TRST.png
new file mode 100644
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diff --git a/packages/website/public/images/token_icons/TRX.png b/packages/website/public/images/token_icons/TRX.png
new file mode 100644
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diff --git a/packages/website/public/images/token_icons/UPP.png b/packages/website/public/images/token_icons/UPP.png
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diff --git a/packages/website/public/images/token_icons/VSL.png b/packages/website/public/images/token_icons/VSL.png
new file mode 100644
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diff --git a/packages/website/public/images/token_icons/WAND.png b/packages/website/public/images/token_icons/WAND.png
new file mode 100644
index 000000000..e22531e21
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+++ b/packages/website/public/images/token_icons/WAND.png
diff --git a/packages/website/public/images/token_icons/ether_erc20.png b/packages/website/public/images/token_icons/WETH.png
index bc8beae8b..bc8beae8b 100644
--- a/packages/website/public/images/token_icons/ether_erc20.png
+++ b/packages/website/public/images/token_icons/WETH.png
diff --git a/packages/website/public/images/token_icons/WTC.png b/packages/website/public/images/token_icons/WTC.png
new file mode 100644
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+++ b/packages/website/public/images/token_icons/WTC.png
diff --git a/packages/website/public/images/token_icons/WYV.png b/packages/website/public/images/token_icons/WYV.png
new file mode 100644
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+++ b/packages/website/public/images/token_icons/WYV.png
diff --git a/packages/website/public/images/token_icons/XAUR.png b/packages/website/public/images/token_icons/XAUR.png
new file mode 100644
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+++ b/packages/website/public/images/token_icons/XAUR.png
diff --git a/packages/website/public/images/token_icons/XNK.png b/packages/website/public/images/token_icons/XNK.png
new file mode 100644
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diff --git a/packages/website/public/images/token_icons/XSC.png b/packages/website/public/images/token_icons/XSC.png
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diff --git a/packages/website/public/images/token_icons/XYO.png b/packages/website/public/images/token_icons/XYO.png
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diff --git a/packages/website/public/images/token_icons/ZIL.png b/packages/website/public/images/token_icons/ZIL.png
new file mode 100644
index 000000000..197227803
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+++ b/packages/website/public/images/token_icons/ZIL.png
diff --git a/packages/website/public/images/token_icons/zero_ex.png b/packages/website/public/images/token_icons/ZRX.png
index 8ed9a984b..8ed9a984b 100644
--- a/packages/website/public/images/token_icons/zero_ex.png
+++ b/packages/website/public/images/token_icons/ZRX.png
diff --git a/packages/website/public/images/token_icons/adtoken.png b/packages/website/public/images/token_icons/adtoken.png
deleted file mode 100644
index 59290af6b..000000000
--- a/packages/website/public/images/token_icons/adtoken.png
+++ /dev/null
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deleted file mode 100644
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+++ /dev/null
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+++ /dev/null
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deleted file mode 100644
index d2b2fa472..000000000
--- a/packages/website/public/images/token_icons/bancor.png
+++ /dev/null
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deleted file mode 100644
index 77e7dfb1f..000000000
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+++ /dev/null
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deleted file mode 100644
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+++ /dev/null
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deleted file mode 100644
index 1d9fc8347..000000000
--- a/packages/website/public/images/token_icons/btc.png
+++ /dev/null
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deleted file mode 100644
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+++ /dev/null
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+++ /dev/null
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deleted file mode 100644
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+++ /dev/null
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deleted file mode 100644
index f292db716..000000000
--- a/packages/website/public/images/token_icons/digixdao.png
+++ /dev/null
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deleted file mode 100644
index 7427b1146..000000000
--- a/packages/website/public/images/token_icons/district0x.png
+++ /dev/null
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index a08f3c042..622df61bc 100644
--- a/packages/website/public/images/token_icons/eos.png
+++ b/packages/website/public/images/token_icons/eos.png
diff --git a/packages/website/public/images/token_icons/etheroll.png b/packages/website/public/images/token_icons/etheroll.png
deleted file mode 100644
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+++ /dev/null
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deleted file mode 100644
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+++ /dev/null
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deleted file mode 100644
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+++ /dev/null
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+++ /dev/null
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+++ /dev/null
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deleted file mode 100644
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--- a/packages/website/public/images/token_icons/lunyr.png
+++ /dev/null
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deleted file mode 100644
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+++ /dev/null
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--- a/packages/website/public/images/token_icons/numeraire.png
+++ /dev/null
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deleted file mode 100644
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+++ /dev/null
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--- a/packages/website/public/images/token_icons/santiment.png
+++ /dev/null
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deleted file mode 100644
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--- a/packages/website/public/images/token_icons/singularity.png
+++ /dev/null
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deleted file mode 100644
index a73ba23ba..000000000
--- a/packages/website/public/images/token_icons/status.png
+++ /dev/null
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deleted file mode 100644
index 87c4d4292..000000000
--- a/packages/website/public/images/token_icons/storjcoinx.png
+++ /dev/null
diff --git a/packages/website/public/images/token_icons/taas.png b/packages/website/public/images/token_icons/taas.png
index 4cca722f7..266e3690b 100644
--- a/packages/website/public/images/token_icons/taas.png
+++ b/packages/website/public/images/token_icons/taas.png
diff --git a/packages/website/public/images/token_icons/tokencard.png b/packages/website/public/images/token_icons/tokencard.png
deleted file mode 100644
index 490c1be69..000000000
--- a/packages/website/public/images/token_icons/tokencard.png
+++ /dev/null
diff --git a/packages/website/public/images/token_icons/trust.png b/packages/website/public/images/token_icons/trust.png
deleted file mode 100644
index 62b412b41..000000000
--- a/packages/website/public/images/token_icons/trust.png
+++ /dev/null
diff --git a/packages/website/public/images/token_icons/wings.png b/packages/website/public/images/token_icons/wings.png
index cd0eb4213..c0a9ce527 100644
--- a/packages/website/public/images/token_icons/wings.png
+++ b/packages/website/public/images/token_icons/wings.png
diff --git a/packages/website/public/images/unlock-mm.png b/packages/website/public/images/unlock-mm.png
new file mode 100644
index 000000000..531c95dd2
--- /dev/null
+++ b/packages/website/public/images/unlock-mm.png
diff --git a/packages/website/ts/artifacts/Exchange.json b/packages/website/ts/artifacts/Exchange.json
new file mode 100644
index 000000000..af8db7360
--- /dev/null
+++ b/packages/website/ts/artifacts/Exchange.json
@@ -0,0 +1,610 @@
+{
+    "contract_name": "Exchange",
+    "abi": [
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "numerator",
+                    "type": "uint256"
+                },
+                {
+                    "name": "denominator",
+                    "type": "uint256"
+                },
+                {
+                    "name": "target",
+                    "type": "uint256"
+                }
+            ],
+            "name": "isRoundingError",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "bool"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "filled",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "cancelled",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5][]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6][]"
+                },
+                {
+                    "name": "fillTakerTokenAmount",
+                    "type": "uint256"
+                },
+                {
+                    "name": "shouldThrowOnInsufficientBalanceOrAllowance",
+                    "type": "bool"
+                },
+                {
+                    "name": "v",
+                    "type": "uint8[]"
+                },
+                {
+                    "name": "r",
+                    "type": "bytes32[]"
+                },
+                {
+                    "name": "s",
+                    "type": "bytes32[]"
+                }
+            ],
+            "name": "fillOrdersUpTo",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6]"
+                },
+                {
+                    "name": "cancelTakerTokenAmount",
+                    "type": "uint256"
+                }
+            ],
+            "name": "cancelOrder",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "ZRX_TOKEN_CONTRACT",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5][]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6][]"
+                },
+                {
+                    "name": "fillTakerTokenAmounts",
+                    "type": "uint256[]"
+                },
+                {
+                    "name": "v",
+                    "type": "uint8[]"
+                },
+                {
+                    "name": "r",
+                    "type": "bytes32[]"
+                },
+                {
+                    "name": "s",
+                    "type": "bytes32[]"
+                }
+            ],
+            "name": "batchFillOrKillOrders",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6]"
+                },
+                {
+                    "name": "fillTakerTokenAmount",
+                    "type": "uint256"
+                },
+                {
+                    "name": "v",
+                    "type": "uint8"
+                },
+                {
+                    "name": "r",
+                    "type": "bytes32"
+                },
+                {
+                    "name": "s",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "fillOrKillOrder",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "orderHash",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "getUnavailableTakerTokenAmount",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "signer",
+                    "type": "address"
+                },
+                {
+                    "name": "hash",
+                    "type": "bytes32"
+                },
+                {
+                    "name": "v",
+                    "type": "uint8"
+                },
+                {
+                    "name": "r",
+                    "type": "bytes32"
+                },
+                {
+                    "name": "s",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "isValidSignature",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "bool"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "numerator",
+                    "type": "uint256"
+                },
+                {
+                    "name": "denominator",
+                    "type": "uint256"
+                },
+                {
+                    "name": "target",
+                    "type": "uint256"
+                }
+            ],
+            "name": "getPartialAmount",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "TOKEN_TRANSFER_PROXY_CONTRACT",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5][]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6][]"
+                },
+                {
+                    "name": "fillTakerTokenAmounts",
+                    "type": "uint256[]"
+                },
+                {
+                    "name": "shouldThrowOnInsufficientBalanceOrAllowance",
+                    "type": "bool"
+                },
+                {
+                    "name": "v",
+                    "type": "uint8[]"
+                },
+                {
+                    "name": "r",
+                    "type": "bytes32[]"
+                },
+                {
+                    "name": "s",
+                    "type": "bytes32[]"
+                }
+            ],
+            "name": "batchFillOrders",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5][]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6][]"
+                },
+                {
+                    "name": "cancelTakerTokenAmounts",
+                    "type": "uint256[]"
+                }
+            ],
+            "name": "batchCancelOrders",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6]"
+                },
+                {
+                    "name": "fillTakerTokenAmount",
+                    "type": "uint256"
+                },
+                {
+                    "name": "shouldThrowOnInsufficientBalanceOrAllowance",
+                    "type": "bool"
+                },
+                {
+                    "name": "v",
+                    "type": "uint8"
+                },
+                {
+                    "name": "r",
+                    "type": "bytes32"
+                },
+                {
+                    "name": "s",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "fillOrder",
+            "outputs": [
+                {
+                    "name": "filledTakerTokenAmount",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6]"
+                }
+            ],
+            "name": "getOrderHash",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "bytes32"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "EXTERNAL_QUERY_GAS_LIMIT",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint16"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "VERSION",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "string"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "inputs": [
+                {
+                    "name": "_zrxToken",
+                    "type": "address"
+                },
+                {
+                    "name": "_tokenTransferProxy",
+                    "type": "address"
+                }
+            ],
+            "payable": false,
+            "type": "constructor"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "maker",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "taker",
+                    "type": "address"
+                },
+                {
+                    "indexed": true,
+                    "name": "feeRecipient",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "makerToken",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "takerToken",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "filledMakerTokenAmount",
+                    "type": "uint256"
+                },
+                {
+                    "indexed": false,
+                    "name": "filledTakerTokenAmount",
+                    "type": "uint256"
+                },
+                {
+                    "indexed": false,
+                    "name": "paidMakerFee",
+                    "type": "uint256"
+                },
+                {
+                    "indexed": false,
+                    "name": "paidTakerFee",
+                    "type": "uint256"
+                },
+                {
+                    "indexed": true,
+                    "name": "tokens",
+                    "type": "bytes32"
+                },
+                {
+                    "indexed": false,
+                    "name": "orderHash",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "LogFill",
+            "type": "event"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "maker",
+                    "type": "address"
+                },
+                {
+                    "indexed": true,
+                    "name": "feeRecipient",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "makerToken",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "takerToken",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "cancelledMakerTokenAmount",
+                    "type": "uint256"
+                },
+                {
+                    "indexed": false,
+                    "name": "cancelledTakerTokenAmount",
+                    "type": "uint256"
+                },
+                {
+                    "indexed": true,
+                    "name": "tokens",
+                    "type": "bytes32"
+                },
+                {
+                    "indexed": false,
+                    "name": "orderHash",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "LogCancel",
+            "type": "event"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "errorId",
+                    "type": "uint8"
+                },
+                {
+                    "indexed": true,
+                    "name": "orderHash",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "LogError",
+            "type": "event"
+        }
+    ],
+    "networks": {
+        "1": {
+            "address": "0x12459c951127e0c374ff9105dda097662a027093"
+        },
+        "3": {
+            "address": "0x479cc461fecd078f766ecc58533d6f69580cf3ac"
+        },
+        "4": {
+            "address": "0x1d16ef40fac01cec8adac2ac49427b9384192c05"
+        },
+        "42": {
+            "address": "0x90fe2af704b34e0224bf2299c838e04d4dcf1364"
+        },
+        "50": {
+            "address": "0x48bacb9266a570d521063ef5dd96e61686dbe788"
+        }
+    }
+}
diff --git a/packages/website/ts/blockchain.ts b/packages/website/ts/blockchain.ts
index cc2afa28a..fde134b18 100644
--- a/packages/website/ts/blockchain.ts
+++ b/packages/website/ts/blockchain.ts
@@ -66,6 +66,9 @@ import RpcSubprovider = require('web3-provider-engine/subproviders/rpc');
 
 import * as MintableArtifacts from '../contracts/Mintable.json';
 
+// HACK: remove this hard-coded abi and use @0xproject/contract-wrappers
+import * as Exchange from './artifacts/Exchange.json';
+
 const BLOCK_NUMBER_BACK_TRACK = 50;
 const GWEI_IN_WEI = 1000000000;
 
@@ -89,6 +92,7 @@ export class Blockchain {
     private _userAddressIfExists: string;
     private _ledgerSubprovider: LedgerSubprovider;
     private _defaultGasPrice: BigNumber;
+    private _watchGasPriceIntervalId: NodeJS.Timer;
     private static _getNameGivenProvider(provider: Provider): string {
         const providerType = utils.getProviderType(provider);
         const providerNameIfExists = providerToName[providerType];
@@ -196,13 +200,11 @@ export class Blockchain {
     }
     constructor(dispatcher: Dispatcher) {
         this._dispatcher = dispatcher;
-        const defaultGasPrice = GWEI_IN_WEI * 30;
+        const defaultGasPrice = GWEI_IN_WEI * 40;
         this._defaultGasPrice = new BigNumber(defaultGasPrice);
         // We need a unique reference to this function so we can use it to unsubcribe.
         this._injectedProviderUpdateHandler = this._handleInjectedProviderUpdateAsync.bind(this);
         // tslint:disable-next-line:no-floating-promises
-        this._updateDefaultGasPriceAsync();
-        // tslint:disable-next-line:no-floating-promises
         this._onPageLoadInitFireAndForgetAsync();
     }
     public async networkIdUpdatedFireAndForgetAsync(newNetworkId: number): Promise<void> {
@@ -537,6 +539,7 @@ export class Blockchain {
         this._blockchainWatcher.destroy();
         this._injectedProviderObservable.unsubscribe(this._injectedProviderUpdateHandler);
         this._stopWatchingExchangeLogFillEvents();
+        this._stopWatchingGasPrice();
     }
     public async fetchTokenInformationAsync(): Promise<void> {
         utils.assert(
@@ -624,7 +627,9 @@ export class Blockchain {
         );
         const provider = this._contractWrappers.getProvider();
         const web3Wrapper = new Web3Wrapper(provider);
-        web3Wrapper.abiDecoder.addABI(this._contractWrappers.exchange.abi);
+        // HACK: remove this hard-coded abi and use @0xproject/contract-wrappers
+        const exchangeAbi = _.get(Exchange, 'abi', []);
+        web3Wrapper.abiDecoder.addABI(exchangeAbi);
         const receipt = await web3Wrapper.awaitTransactionSuccessAsync(txHash);
         return receipt;
     }
@@ -769,7 +774,7 @@ export class Blockchain {
         _.each(tokenRegistryTokens, (t: ZeroExToken) => {
             // HACK: For now we have a hard-coded list of iconUrls for the dummyTokens
             // TODO: Refactor this out and pull the iconUrl directly from the TokenRegistry
-            const iconUrl = configs.ICON_URL_BY_SYMBOL[t.symbol];
+            const iconUrl = utils.getTokenIconUrl(t.symbol);
             const token: Token = {
                 iconUrl,
                 address: t.address,
@@ -798,8 +803,30 @@ export class Blockchain {
         this._updateProviderName(injectedWeb3IfExists);
         const shouldPollUserAddress = true;
         const shouldUseLedgerProvider = false;
+        this._startWatchingGasPrice();
         await this._resetOrInitializeAsync(this.networkId, shouldPollUserAddress, shouldUseLedgerProvider);
     }
+    private _startWatchingGasPrice(): void {
+        if (!_.isUndefined(this._watchGasPriceIntervalId)) {
+            return; // we are already watching
+        }
+        const oneMinuteInMs = 60000;
+        // tslint:disable-next-line:no-floating-promises
+        this._updateDefaultGasPriceAsync();
+        this._watchGasPriceIntervalId = intervalUtils.setAsyncExcludingInterval(
+            this._updateDefaultGasPriceAsync.bind(this),
+            oneMinuteInMs,
+            (err: Error) => {
+                logUtils.log(`Watching gas price failed: ${err.stack}`);
+                this._stopWatchingGasPrice();
+            },
+        );
+    }
+    private _stopWatchingGasPrice(): void {
+        if (!_.isUndefined(this._watchGasPriceIntervalId)) {
+            intervalUtils.clearAsyncExcludingInterval(this._watchGasPriceIntervalId);
+        }
+    }
     private async _resetOrInitializeAsync(
         networkId: number,
         shouldPollUserAddress: boolean = false,
@@ -895,7 +922,7 @@ export class Blockchain {
     private async _updateDefaultGasPriceAsync(): Promise<void> {
         try {
             const gasInfo = await backendClient.getGasInfoAsync();
-            const gasPriceInGwei = new BigNumber(gasInfo.average / 10);
+            const gasPriceInGwei = new BigNumber(gasInfo.fast / 10);
             const gasPriceInWei = gasPriceInGwei.mul(1000000000);
             this._defaultGasPrice = gasPriceInWei;
         } catch (err) {
diff --git a/packages/website/ts/components/dialogs/ledger_config_dialog.tsx b/packages/website/ts/components/dialogs/ledger_config_dialog.tsx
index 38e4732a4..d2f373d67 100644
--- a/packages/website/ts/components/dialogs/ledger_config_dialog.tsx
+++ b/packages/website/ts/components/dialogs/ledger_config_dialog.tsx
@@ -29,7 +29,7 @@ interface LedgerConfigDialogProps {
     toggleDialogFn: (isOpen: boolean) => void;
     dispatcher: Dispatcher;
     blockchain: Blockchain;
-    networkId: number;
+    networkId?: number;
     providerType: ProviderType;
 }
 
@@ -44,6 +44,9 @@ interface LedgerConfigDialogState {
 }
 
 export class LedgerConfigDialog extends React.Component<LedgerConfigDialogProps, LedgerConfigDialogState> {
+    public static defaultProps = {
+        networkId: 1,
+    };
     constructor(props: LedgerConfigDialogProps) {
         super(props);
         const derivationPathIfExists = props.blockchain.getLedgerDerivationPathIfExists();
diff --git a/packages/website/ts/components/eth_wrappers.tsx b/packages/website/ts/components/eth_wrappers.tsx
index 20b446155..0b282b2a1 100644
--- a/packages/website/ts/components/eth_wrappers.tsx
+++ b/packages/website/ts/components/eth_wrappers.tsx
@@ -20,6 +20,7 @@ import {
 } from 'ts/types';
 import { configs } from 'ts/utils/configs';
 import { constants } from 'ts/utils/constants';
+import { utils } from 'ts/utils/utils';
 
 const DATE_FORMAT = 'D/M/YY';
 const ICON_DIMENSION = 40;
@@ -95,7 +96,11 @@ export class EthWrappers extends React.Component<EthWrappersProps, EthWrappersSt
             this.props.networkId,
             EtherscanLinkSuffixes.Address,
         );
-        const tokenLabel = this._renderToken('Wrapped Ether', etherToken.address, configs.ICON_URL_BY_SYMBOL.WETH);
+        const tokenLabel = this._renderToken(
+            'Wrapped Ether',
+            etherToken.address,
+            utils.getTokenIconUrl(etherToken.symbol),
+        );
         const userEtherBalanceInEth = !_.isUndefined(this.props.userEtherBalanceInWei)
             ? Web3Wrapper.toUnitAmount(this.props.userEtherBalanceInWei, constants.DECIMAL_PLACES_ETH)
             : undefined;
diff --git a/packages/website/ts/components/generate_order/asset_picker.tsx b/packages/website/ts/components/generate_order/asset_picker.tsx
index 3d53a9e7d..5eada37b6 100644
--- a/packages/website/ts/components/generate_order/asset_picker.tsx
+++ b/packages/website/ts/components/generate_order/asset_picker.tsx
@@ -3,6 +3,8 @@ import Dialog from 'material-ui/Dialog';
 import FlatButton from 'material-ui/FlatButton';
 import * as moment from 'moment';
 import * as React from 'react';
+import firstBy = require('thenby');
+
 import { Blockchain } from 'ts/blockchain';
 import { NewTokenForm } from 'ts/components/generate_order/new_token_form';
 import { TrackTokenConfirmation } from 'ts/components/track_token_confirmation';
@@ -87,10 +89,10 @@ export class AssetPicker extends React.Component<AssetPickerProps, AssetPickerSt
         return (
             <Dialog
                 title={dialogConfigs.title}
-                titleStyle={{ fontWeight: 100 }}
                 modal={dialogConfigs.isModal}
                 open={this.props.isOpen}
                 actions={dialogConfigs.actions}
+                autoScrollBodyContent={true}
                 onRequestClose={this._onCloseDialog.bind(this)}
             >
                 {this.state.assetView === AssetViews.ASSET_PICKER && this._renderAssetPicker()}
@@ -121,9 +123,8 @@ export class AssetPicker extends React.Component<AssetPickerProps, AssetPickerSt
             <div
                 className="flex flex-wrap"
                 style={{
-                    overflowY: 'auto',
-                    maxWidth: 720,
-                    maxHeight: 356,
+                    maxWidth: 1000,
+                    maxHeight: 600,
                     marginBottom: 10,
                 }}
             >
@@ -134,15 +135,28 @@ export class AssetPicker extends React.Component<AssetPickerProps, AssetPickerSt
     private _renderGridTiles(): React.ReactNode {
         let isHovered;
         let tileStyles;
-        const gridTiles = _.map(this.props.tokenByAddress, (token: Token, address: string) => {
-            if (
-                (this.props.tokenVisibility === TokenVisibility.TRACKED && !utils.isTokenTracked(token)) ||
-                (this.props.tokenVisibility === TokenVisibility.UNTRACKED && utils.isTokenTracked(token)) ||
-                token.symbol === constants.ZRX_TOKEN_SYMBOL ||
-                token.symbol === constants.ETHER_TOKEN_SYMBOL
-            ) {
-                return null; // Skip
-            }
+        const allTokens = _.values(this.props.tokenByAddress);
+        // filter tokens based on visibility specified in props, do not show ZRX or ETHER as tracked or untracked
+        const filteredTokens =
+            this.props.tokenVisibility === TokenVisibility.ALL
+                ? allTokens
+                : _.filter(allTokens, token => {
+                      return (
+                          token.symbol !== constants.ZRX_TOKEN_SYMBOL &&
+                          token.symbol !== constants.ETHER_TOKEN_SYMBOL &&
+                          ((this.props.tokenVisibility === TokenVisibility.TRACKED && utils.isTokenTracked(token)) ||
+                              (this.props.tokenVisibility === TokenVisibility.UNTRACKED &&
+                                  !utils.isTokenTracked(token)))
+                      );
+                  });
+        // if we are showing tracked tokens, sort by date added, otherwise sort by symbol
+        const sortKey = this.props.tokenVisibility === TokenVisibility.TRACKED ? 'trackedTimestamp' : 'symbol';
+        const sortedTokens = filteredTokens.sort(firstBy(sortKey));
+        if (_.isEmpty(sortedTokens)) {
+            return <div className="mx-auto p4 h2">No tokens to remove.</div>;
+        }
+        const gridTiles = _.map(sortedTokens, token => {
+            const address = token.address;
             isHovered = this.state.hoveredAddress === address;
             tileStyles = {
                 cursor: 'pointer',
diff --git a/packages/website/ts/components/onboarding/add_eth_onboarding_step.tsx b/packages/website/ts/components/onboarding/add_eth_onboarding_step.tsx
index bccdc0c18..ca71fcd50 100644
--- a/packages/website/ts/components/onboarding/add_eth_onboarding_step.tsx
+++ b/packages/website/ts/components/onboarding/add_eth_onboarding_step.tsx
@@ -1,10 +1,10 @@
 import { BigNumber } from '@0xproject/utils';
 import * as React from 'react';
+import { Balance } from 'ts/components/ui/balance';
 import { Container } from 'ts/components/ui/container';
 import { Image } from 'ts/components/ui/image';
 import { Text } from 'ts/components/ui/text';
 import { constants } from 'ts/utils/constants';
-import { utils } from 'ts/utils/utils';
 
 export interface AddEthOnboardingStepProps {
     userEthBalanceInWei: BigNumber;
@@ -15,13 +15,11 @@ export const AddEthOnboardingStep: React.StatelessComponent<AddEthOnboardingStep
         <div className="flex items-center flex-column">
             <Text>
                 Great! Looks like you already have{' '}
-                <b>
-                    {utils.getFormattedAmount(
-                        props.userEthBalanceInWei,
-                        constants.DECIMAL_PLACES_ETH,
-                        constants.ETHER_SYMBOL,
-                    )}{' '}
-                </b>
+                <Balance
+                    amount={props.userEthBalanceInWei}
+                    decimals={constants.DECIMAL_PLACES_ETH}
+                    symbol={constants.ETHER_SYMBOL}
+                />{' '}
                 in your wallet.
             </Text>
             <Container marginTop="15px" marginBottom="15px">
diff --git a/packages/website/ts/components/onboarding/onboarding_card.tsx b/packages/website/ts/components/onboarding/onboarding_card.tsx
index ba5b3d6ea..e1b0f304b 100644
--- a/packages/website/ts/components/onboarding/onboarding_card.tsx
+++ b/packages/website/ts/components/onboarding/onboarding_card.tsx
@@ -12,6 +12,7 @@ export type ContinueButtonDisplay = 'enabled' | 'disabled';
 
 export interface OnboardingCardProps {
     title?: string;
+    shouldCenterTitle?: boolean;
     content: React.ReactNode;
     isLastStep: boolean;
     onClose: () => void;
@@ -23,10 +24,13 @@ export interface OnboardingCardProps {
     shouldHideNextButton?: boolean;
     continueButtonText?: string;
     borderRadius?: string;
+    // Used for super-custom content.
+    shouldRemoveExtraSpacing?: boolean;
 }
 
 export const OnboardingCard: React.StatelessComponent<OnboardingCardProps> = ({
     title,
+    shouldCenterTitle,
     content,
     continueButtonDisplay,
     continueButtonText,
@@ -37,55 +41,75 @@ export const OnboardingCard: React.StatelessComponent<OnboardingCardProps> = ({
     shouldHideBackButton,
     shouldHideNextButton,
     borderRadius,
-}) => (
-    <Island borderRadius={borderRadius}>
-        <Container paddingRight="30px" paddingLeft="30px" paddingTop="15px" paddingBottom="15px">
-            <div className="flex flex-column">
-                <div className="flex justify-between">
-                    <Title>{title}</Title>
-                    <Container position="relative" bottom="20px" left="15px">
-                        <IconButton color={colors.grey} iconName="zmdi-close" onClick={onClose}>
-                            Close
-                        </IconButton>
+    shouldRemoveExtraSpacing,
+}) => {
+    const padding = shouldRemoveExtraSpacing
+        ? {}
+        : {
+              paddingRight: '30px',
+              paddingLeft: '30px',
+              paddingTop: '15px',
+              paddingBottom: '15px',
+          };
+    const closeIconPositioning = shouldRemoveExtraSpacing
+        ? { right: '15px', bottom: '3px' }
+        : { bottom: '20px', left: '15px' };
+    return (
+        <Island borderRadius={borderRadius}>
+            <Container {...padding}>
+                <div className="flex flex-column">
+                    <Container className="flex justify-between">
+                        <Container width="100%">
+                            <Title center={shouldCenterTitle}>{title}</Title>
+                        </Container>
+                        <Container position="relative" {...closeIconPositioning}>
+                            <IconButton color={colors.grey} iconName="zmdi-close" onClick={onClose}>
+                                Close
+                            </IconButton>
+                        </Container>
                     </Container>
+                    <Container marginBottom={shouldRemoveExtraSpacing ? undefined : '15px'}>
+                        <Text>{content}</Text>
+                    </Container>
+                    {continueButtonDisplay && (
+                        <Button
+                            isDisabled={continueButtonDisplay === 'disabled'}
+                            onClick={!_.isUndefined(onContinueButtonClick) ? onContinueButtonClick : onClickNext}
+                            fontColor={colors.white}
+                            fontSize="15px"
+                            backgroundColor={colors.mediumBlue}
+                        >
+                            {continueButtonText}
+                        </Button>
+                    )}
+                    {!(shouldHideBackButton && shouldHideNextButton) && (
+                        <Container className="clearfix" marginTop="15px">
+                            <div className="left">
+                                {!shouldHideBackButton && (
+                                    <Text fontColor={colors.grey} onClick={onClickBack}>
+                                        Back
+                                    </Text>
+                                )}
+                            </div>
+                            <div className="right">
+                                {!shouldHideNextButton && (
+                                    <Text fontColor={colors.grey} onClick={onClickNext}>
+                                        Skip
+                                    </Text>
+                                )}
+                            </div>
+                        </Container>
+                    )}
                 </div>
-                <Container marginBottom="15px">
-                    <Text>{content}</Text>
-                </Container>
-                {continueButtonDisplay && (
-                    <Button
-                        isDisabled={continueButtonDisplay === 'disabled'}
-                        onClick={!_.isUndefined(onContinueButtonClick) ? onContinueButtonClick : onClickNext}
-                        fontColor={colors.white}
-                        fontSize="15px"
-                        backgroundColor={colors.mediumBlue}
-                    >
-                        {continueButtonText}
-                    </Button>
-                )}
-                <Container className="clearfix" marginTop="15px">
-                    <div className="left">
-                        {!shouldHideBackButton && (
-                            <Text fontColor={colors.grey} onClick={onClickBack}>
-                                Back
-                            </Text>
-                        )}
-                    </div>
-                    <div className="right">
-                        {!shouldHideNextButton && (
-                            <Text fontColor={colors.grey} onClick={onClickNext}>
-                                Skip
-                            </Text>
-                        )}
-                    </div>
-                </Container>
-            </div>
-        </Container>
-    </Island>
-);
+            </Container>
+        </Island>
+    );
+};
 
 OnboardingCard.defaultProps = {
     continueButtonText: 'Continue',
+    shouldCenterTitle: false,
+    shouldRemoveExtraSpacing: false,
 };
 
 OnboardingCard.displayName = 'OnboardingCard';
diff --git a/packages/website/ts/components/onboarding/onboarding_flow.tsx b/packages/website/ts/components/onboarding/onboarding_flow.tsx
index c2b4a4ca7..91d5f2476 100644
--- a/packages/website/ts/components/onboarding/onboarding_flow.tsx
+++ b/packages/website/ts/components/onboarding/onboarding_flow.tsx
@@ -2,11 +2,14 @@ import * as React from 'react';
 import { Placement, Popper, PopperChildrenProps } from 'react-popper';
 
 import { OnboardingCard } from 'ts/components/onboarding/onboarding_card';
-import { ContinueButtonDisplay, OnboardingTooltip } from 'ts/components/onboarding/onboarding_tooltip';
+import {
+    ContinueButtonDisplay,
+    OnboardingTooltip,
+    TooltipPointerDisplay,
+} from 'ts/components/onboarding/onboarding_tooltip';
 import { Animation } from 'ts/components/ui/animation';
 import { Container } from 'ts/components/ui/container';
 import { Overlay } from 'ts/components/ui/overlay';
-import { PointerDirection } from 'ts/components/ui/pointer';
 import { zIndex } from 'ts/style/z_index';
 
 export interface FixedPositionSettings {
@@ -15,7 +18,7 @@ export interface FixedPositionSettings {
     bottom?: string;
     left?: string;
     right?: string;
-    pointerDirection?: PointerDirection;
+    tooltipPointerDisplay?: TooltipPointerDisplay;
 }
 
 export interface TargetPositionSettings {
@@ -28,12 +31,15 @@ export interface Step {
     // Provide either a CSS selector, or fixed position settings. Only applies to desktop.
     position: TargetPositionSettings | FixedPositionSettings;
     title?: string;
+    shouldCenterTitle?: boolean;
     content: React.ReactNode;
     shouldHideBackButton?: boolean;
     shouldHideNextButton?: boolean;
     continueButtonDisplay?: ContinueButtonDisplay;
     continueButtonText?: string;
     onContinueButtonClick?: () => void;
+    // Only used for very custom steps.
+    shouldRemoveExtraSpacing?: boolean;
 }
 
 export interface OnboardingFlowProps {
@@ -44,12 +50,14 @@ export interface OnboardingFlowProps {
     updateOnboardingStep: (stepIndex: number) => void;
     disableOverlay?: boolean;
     isMobile: boolean;
+    disableCloseOnClickOutside?: boolean;
 }
 
 export class OnboardingFlow extends React.Component<OnboardingFlowProps> {
     public static defaultProps = {
         disableOverlay: false,
         isMobile: false,
+        disableCloseOnClickOutside: false,
     };
     public render(): React.ReactNode {
         if (!this.props.isRunning) {
@@ -67,7 +75,7 @@ export class OnboardingFlow extends React.Component<OnboardingFlowProps> {
                 </Popper>
             );
         } else if (currentStep.position.type === 'fixed') {
-            const { top, right, bottom, left, pointerDirection } = currentStep.position;
+            const { top, right, bottom, left, tooltipPointerDisplay } = currentStep.position;
             onboardingElement = (
                 <Container
                     position="fixed"
@@ -77,7 +85,7 @@ export class OnboardingFlow extends React.Component<OnboardingFlowProps> {
                     bottom={bottom}
                     left={left}
                 >
-                    {this._renderToolTip(pointerDirection)}
+                    {this._renderToolTip(tooltipPointerDisplay)}
                 </Container>
             );
         }
@@ -86,7 +94,7 @@ export class OnboardingFlow extends React.Component<OnboardingFlowProps> {
         }
         return (
             <div>
-                <Overlay onClick={this.props.onClose} />
+                <Overlay onClick={this.props.disableCloseOnClickOutside ? undefined : this.props.onClose} />
                 {onboardingElement}
             </div>
         );
@@ -101,7 +109,7 @@ export class OnboardingFlow extends React.Component<OnboardingFlowProps> {
             </div>
         );
     }
-    private _renderToolTip(pointerDirection?: PointerDirection): React.ReactNode {
+    private _renderToolTip(tooltipPointerDisplay?: TooltipPointerDisplay): React.ReactNode {
         const { steps, stepIndex } = this.props;
         const step = steps[stepIndex];
         const isLastStep = steps.length - 1 === stepIndex;
@@ -109,6 +117,7 @@ export class OnboardingFlow extends React.Component<OnboardingFlowProps> {
             <Container marginLeft="30px" width="400px">
                 <OnboardingTooltip
                     title={step.title}
+                    shouldCenterTitle={step.shouldCenterTitle}
                     content={step.content}
                     isLastStep={isLastStep}
                     shouldHideBackButton={step.shouldHideBackButton}
@@ -119,7 +128,8 @@ export class OnboardingFlow extends React.Component<OnboardingFlowProps> {
                     continueButtonDisplay={step.continueButtonDisplay}
                     continueButtonText={step.continueButtonText}
                     onContinueButtonClick={step.onContinueButtonClick}
-                    pointerDirection={pointerDirection}
+                    pointerDisplay={tooltipPointerDisplay}
+                    shouldRemoveExtraSpacing={step.shouldRemoveExtraSpacing}
                 />
             </Container>
         );
@@ -133,6 +143,7 @@ export class OnboardingFlow extends React.Component<OnboardingFlowProps> {
             <Container position="relative" zIndex={1}>
                 <OnboardingCard
                     title={step.title}
+                    shouldCenterTitle={step.shouldCenterTitle}
                     content={step.content}
                     isLastStep={isLastStep}
                     shouldHideBackButton={step.shouldHideBackButton}
@@ -144,6 +155,7 @@ export class OnboardingFlow extends React.Component<OnboardingFlowProps> {
                     continueButtonText={step.continueButtonText}
                     onContinueButtonClick={step.onContinueButtonClick}
                     borderRadius="10px 10px 0px 0px"
+                    shouldRemoveExtraSpacing={step.shouldRemoveExtraSpacing}
                 />
             </Container>
         );
diff --git a/packages/website/ts/components/onboarding/onboarding_tooltip.tsx b/packages/website/ts/components/onboarding/onboarding_tooltip.tsx
index d8065625d..15d47908d 100644
--- a/packages/website/ts/components/onboarding/onboarding_tooltip.tsx
+++ b/packages/website/ts/components/onboarding/onboarding_tooltip.tsx
@@ -4,22 +4,27 @@ import { OnboardingCard, OnboardingCardProps } from 'ts/components/onboarding/on
 import { Pointer, PointerDirection } from 'ts/components/ui/pointer';
 
 export type ContinueButtonDisplay = 'enabled' | 'disabled';
+export type TooltipPointerDisplay = PointerDirection | 'none';
 
 export interface OnboardingTooltipProps extends OnboardingCardProps {
     className?: string;
-    pointerDirection?: PointerDirection;
+    pointerDisplay?: TooltipPointerDisplay;
 }
 
 export const OnboardingTooltip: React.StatelessComponent<OnboardingTooltipProps> = props => {
-    const { pointerDirection, className, ...cardProps } = props;
+    const { pointerDisplay, className, ...cardProps } = props;
+    const card = <OnboardingCard {...cardProps} />;
+    if (pointerDisplay === 'none') {
+        return card;
+    }
     return (
-        <Pointer className={className} direction={pointerDirection}>
+        <Pointer className={className} direction={pointerDisplay}>
             <OnboardingCard {...cardProps} />
         </Pointer>
     );
 };
 OnboardingTooltip.defaultProps = {
-    pointerDirection: 'left',
+    pointerDisplay: 'left',
 };
 
 OnboardingTooltip.displayName = 'OnboardingTooltip';
diff --git a/packages/website/ts/components/onboarding/portal_onboarding_flow.tsx b/packages/website/ts/components/onboarding/portal_onboarding_flow.tsx
index 1c2c92fd1..20a8f0a32 100644
--- a/packages/website/ts/components/onboarding/portal_onboarding_flow.tsx
+++ b/packages/website/ts/components/onboarding/portal_onboarding_flow.tsx
@@ -23,7 +23,7 @@ import {
     WrapEthOnboardingStep3,
 } from 'ts/components/onboarding/wrap_eth_onboarding_step';
 import { AllowanceToggle } from 'ts/containers/inputs/allowance_toggle';
-import { ProviderType, ScreenWidths, Token, TokenByAddress, TokenStateByAddress } from 'ts/types';
+import { BrowserType, ProviderType, ScreenWidths, Token, TokenByAddress, TokenStateByAddress } from 'ts/types';
 import { analytics } from 'ts/utils/analytics';
 import { utils } from 'ts/utils/utils';
 
@@ -68,6 +68,7 @@ class PlainPortalOnboardingFlow extends React.Component<PortalOnboardingFlowProp
         }
     }
     public render(): React.ReactNode {
+        const browserType = utils.getBrowserType();
         return (
             <OnboardingFlow
                 steps={this._getSteps()}
@@ -77,6 +78,8 @@ class PlainPortalOnboardingFlow extends React.Component<PortalOnboardingFlowProp
                 updateOnboardingStep={this._updateOnboardingStep.bind(this)}
                 disableOverlay={this.props.screenWidth === ScreenWidths.Sm}
                 isMobile={this.props.screenWidth === ScreenWidths.Sm}
+                // This is necessary to ensure onboarding stays open once the user unlocks metamask and clicks away
+                disableCloseOnClickOutside={browserType === BrowserType.Firefox || browserType === BrowserType.Opera}
             />
         );
     }
@@ -88,9 +91,9 @@ class PlainPortalOnboardingFlow extends React.Component<PortalOnboardingFlowProp
         };
         const underMetamaskExtension: FixedPositionSettings = {
             type: 'fixed',
-            top: '30px',
+            top: '10px',
             right: '10px',
-            pointerDirection: 'top',
+            tooltipPointerDisplay: 'none',
         };
         const steps: Step[] = [
             {
@@ -102,10 +105,12 @@ class PlainPortalOnboardingFlow extends React.Component<PortalOnboardingFlowProp
             },
             {
                 position: underMetamaskExtension,
-                title: '0x Ecosystem Setup',
+                title: 'Please Unlock Metamask...',
                 content: <UnlockWalletOnboardingStep />,
                 shouldHideBackButton: true,
                 shouldHideNextButton: true,
+                shouldCenterTitle: true,
+                shouldRemoveExtraSpacing: true,
             },
             {
                 position: nextToWalletPosition,
@@ -137,13 +142,7 @@ class PlainPortalOnboardingFlow extends React.Component<PortalOnboardingFlowProp
             {
                 position: nextToWalletPosition,
                 title: 'Step 2: Wrap ETH',
-                content: (
-                    <WrapEthOnboardingStep3
-                        formattedWethBalanceIfExists={
-                            this._userHasVisibleWeth() ? this._getFormattedWethBalance() : undefined
-                        }
-                    />
-                ),
+                content: <WrapEthOnboardingStep3 wethAmount={this._getWethBalance()} />,
                 continueButtonDisplay: this._userHasVisibleWeth() ? 'enabled' : 'disabled',
             },
             {
@@ -184,11 +183,6 @@ class PlainPortalOnboardingFlow extends React.Component<PortalOnboardingFlowProp
         const ethTokenState = this.props.trackedTokenStateByAddress[ethToken.address];
         return ethTokenState.balance;
     }
-    private _getFormattedWethBalance(): string {
-        const ethToken = utils.getEthToken(this.props.tokenByAddress);
-        const ethTokenState = this.props.trackedTokenStateByAddress[ethToken.address];
-        return utils.getFormattedAmountFromToken(ethToken, ethTokenState);
-    }
     private _userHasVisibleWeth(): boolean {
         return this._getWethBalance() > new BigNumber(0);
     }
diff --git a/packages/website/ts/components/onboarding/unlock_wallet_onboarding_step.tsx b/packages/website/ts/components/onboarding/unlock_wallet_onboarding_step.tsx
index 4ed7137d4..358141520 100644
--- a/packages/website/ts/components/onboarding/unlock_wallet_onboarding_step.tsx
+++ b/packages/website/ts/components/onboarding/unlock_wallet_onboarding_step.tsx
@@ -1,16 +1,8 @@
 import * as React from 'react';
-import { Container } from 'ts/components/ui/container';
-import { Text } from 'ts/components/ui/text';
+import { Image } from 'ts/components/ui/image';
 
 export interface UnlockWalletOnboardingStepProps {}
 
 export const UnlockWalletOnboardingStep: React.StatelessComponent<UnlockWalletOnboardingStepProps> = () => (
-    <div className="flex items-center flex-column">
-        <div className="flex items-center flex-column">
-            <Container marginTop="15px" marginBottom="15px">
-                <img src="/images/metamask_icon.png" height="50px" width="50px" />
-            </Container>
-            <Text center={true}>Unlock your MetaMask extension to get started.</Text>
-        </div>
-    </div>
+    <Image src="/images/unlock-mm.png" />
 );
diff --git a/packages/website/ts/components/onboarding/wrap_eth_onboarding_step.tsx b/packages/website/ts/components/onboarding/wrap_eth_onboarding_step.tsx
index 4d336c80f..e4332de75 100644
--- a/packages/website/ts/components/onboarding/wrap_eth_onboarding_step.tsx
+++ b/packages/website/ts/components/onboarding/wrap_eth_onboarding_step.tsx
@@ -1,8 +1,11 @@
 import { colors } from '@0xproject/react-shared';
+import { BigNumber } from '@0xproject/utils';
 import * as React from 'react';
+import { Balance } from 'ts/components/ui/balance';
 import { Container } from 'ts/components/ui/container';
 import { IconButton } from 'ts/components/ui/icon_button';
 import { Text } from 'ts/components/ui/text';
+import { constants } from 'ts/utils/constants';
 
 export interface WrapEthOnboardingStep1Props {}
 
@@ -51,16 +54,20 @@ export const WrapEthOnboardingStep2: React.StatelessComponent<WrapEthOnboardingS
 );
 
 export interface WrapEthOnboardingStep3Props {
-    formattedWethBalanceIfExists?: string;
+    wethAmount: BigNumber;
 }
 
-export const WrapEthOnboardingStep3: React.StatelessComponent<WrapEthOnboardingStep3Props> = ({
-    formattedWethBalanceIfExists,
-}) => (
+export const WrapEthOnboardingStep3: React.StatelessComponent<WrapEthOnboardingStep3Props> = ({ wethAmount }) => (
     <div className="flex items-center flex-column">
         <Text>
-            You have <b>{formattedWethBalanceIfExists || '0 WETH'}</b> in your wallet.
-            {formattedWethBalanceIfExists && ' Great!'}
+            You have{' '}
+            <Balance
+                amount={wethAmount}
+                decimals={constants.DECIMAL_PLACES_ETH}
+                symbol={constants.ETHER_TOKEN_SYMBOL}
+            />{' '}
+            in your wallet.
+            {wethAmount.gt(0) && ' Great!'}
         </Text>
         <Container width="100%" marginTop="25px" marginBottom="15px" className="flex justify-center">
             <div className="flex flex-column items-center">
diff --git a/packages/website/ts/components/ui/balance.tsx b/packages/website/ts/components/ui/balance.tsx
new file mode 100644
index 000000000..9e5a256b6
--- /dev/null
+++ b/packages/website/ts/components/ui/balance.tsx
@@ -0,0 +1,27 @@
+import { BigNumber } from '@0xproject/utils';
+import * as React from 'react';
+import { Container } from 'ts/components/ui/container';
+import { Text } from 'ts/components/ui/text';
+import { utils } from 'ts/utils/utils';
+
+export interface BalanceProps {
+    amount: BigNumber;
+    decimals: number;
+    symbol: string;
+}
+
+export const Balance: React.StatelessComponent<BalanceProps> = ({ amount, decimals, symbol }) => {
+    const formattedAmout = utils.getFormattedAmount(amount, decimals);
+    return (
+        <span>
+            <Text Tag="span" fontSize="16px" fontWeight="700" lineHeight="1em">
+                {formattedAmout}
+            </Text>
+            <Container marginLeft="0.3em" Tag="span">
+                <Text Tag="span" fontSize="12px" fontWeight="700" lineHeight="1em">
+                    {symbol}
+                </Text>
+            </Container>
+        </span>
+    );
+};
diff --git a/packages/website/ts/components/ui/container.tsx b/packages/website/ts/components/ui/container.tsx
index edbf8814b..427cc6cc7 100644
--- a/packages/website/ts/components/ui/container.tsx
+++ b/packages/website/ts/components/ui/container.tsx
@@ -2,6 +2,8 @@ import * as React from 'react';
 
 type StringOrNum = string | number;
 
+export type ContainerTag = 'div' | 'span';
+
 export interface ContainerProps {
     marginTop?: StringOrNum;
     marginBottom?: StringOrNum;
@@ -28,15 +30,21 @@ export interface ContainerProps {
     right?: string;
     bottom?: string;
     zIndex?: number;
+    Tag?: ContainerTag;
 }
 
-export const Container: React.StatelessComponent<ContainerProps> = ({ children, className, isHidden, ...style }) => {
+export const Container: React.StatelessComponent<ContainerProps> = props => {
+    const { children, className, Tag, isHidden, ...style } = props;
     const visibility = isHidden ? 'hidden' : undefined;
     return (
-        <div style={{ ...style, visibility }} className={className}>
+        <Tag style={{ ...style, visibility }} className={className}>
             {children}
-        </div>
+        </Tag>
     );
 };
 
+Container.defaultProps = {
+    Tag: 'div',
+};
+
 Container.displayName = 'Container';
diff --git a/packages/website/ts/components/wallet/wallet.tsx b/packages/website/ts/components/wallet/wallet.tsx
index de3b91ad0..6c1c495d7 100644
--- a/packages/website/ts/components/wallet/wallet.tsx
+++ b/packages/website/ts/components/wallet/wallet.tsx
@@ -8,6 +8,7 @@ import firstBy = require('thenby');
 
 import { Blockchain } from 'ts/blockchain';
 import { AccountConnection } from 'ts/components/ui/account_connection';
+import { Balance } from 'ts/components/ui/balance';
 import { Container } from 'ts/components/ui/container';
 import { DropDown, DropdownMouseEvent } from 'ts/components/ui/drop_down';
 import { IconButton } from 'ts/components/ui/icon_button';
@@ -269,8 +270,8 @@ export class Wallet extends React.Component<WalletProps, WalletState> {
             position: 'relative',
             overflowY: this.state.isHoveringSidebar ? 'scroll' : 'hidden',
             marginRight: this.state.isHoveringSidebar ? 0 : 4,
-            // TODO: make this completely responsive
-            maxHeight: this.props.screenWidth !== ScreenWidths.Sm ? 475 : undefined,
+            minHeight: '250px',
+            maxHeight: !utils.isMobileWidth(this.props.screenWidth) ? 'calc(90vh - 300px)' : undefined,
         };
     }
     private _onSidebarHover(_event: React.FormEvent<HTMLInputElement>): void {
@@ -436,12 +437,7 @@ export class Wallet extends React.Component<WalletProps, WalletState> {
                 </PlaceHolder>
             );
         } else {
-            const result = utils.getFormattedAmount(amount, decimals, symbol);
-            return (
-                <Text fontSize="16px" fontWeight="bold" lineHeight="1em">
-                    {result}
-                </Text>
-            );
+            return <Balance amount={amount} decimals={decimals} symbol={symbol} />;
         }
     }
     private _renderValue(
diff --git a/packages/website/ts/types.ts b/packages/website/ts/types.ts
index f7324e87a..e8dc694f6 100644
--- a/packages/website/ts/types.ts
+++ b/packages/website/ts/types.ts
@@ -243,8 +243,8 @@ export enum BlockchainCallErrs {
 }
 
 export enum Environments {
-    DEVELOPMENT,
-    PRODUCTION,
+    DEVELOPMENT = 'DEVELOPMENT',
+    PRODUCTION = 'PRODUCTION',
 }
 
 export type ContractInstance = any; // TODO: add type definition for Contract
@@ -552,7 +552,10 @@ export interface WebsiteBackendTokenInfo {
 }
 
 export interface WebsiteBackendGasInfo {
+    safeSlow: number;
     average: number;
+    fast: number;
+    fastest: number;
 }
 
 export interface WebsiteBackendJobInfo {
diff --git a/packages/website/ts/utils/configs.ts b/packages/website/ts/utils/configs.ts
index e8a486c35..97aabd13d 100644
--- a/packages/website/ts/utils/configs.ts
+++ b/packages/website/ts/utils/configs.ts
@@ -22,50 +22,9 @@ export const configs = {
     DOMAIN_DEVELOPMENT: '0xproject.localhost:3572',
     DOMAIN_PRODUCTION: '0xproject.com',
     ENVIRONMENT: isDevelopment ? Environments.DEVELOPMENT : Environments.PRODUCTION,
-    ICON_URL_BY_SYMBOL: {
-        REP: '/images/token_icons/augur.png',
-        DGD: '/images/token_icons/digixdao.png',
-        WETH: '/images/token_icons/ether_erc20.png',
-        MLN: '/images/token_icons/melon.png',
-        GNT: '/images/token_icons/golem.png',
-        MKR: '/images/token_icons/makerdao.png',
-        ZRX: '/images/token_icons/zero_ex.png',
-        ANT: '/images/token_icons/aragon.png',
-        BNT: '/images/token_icons/bancor.png',
-        BAT: '/images/token_icons/basicattentiontoken.png',
-        CVC: '/images/token_icons/civic.png',
-        EOS: '/images/token_icons/eos.png',
-        FUN: '/images/token_icons/funfair.png',
-        GNO: '/images/token_icons/gnosis.png',
-        ICN: '/images/token_icons/iconomi.png',
-        OMG: '/images/token_icons/omisego.png',
-        SNT: '/images/token_icons/status.png',
-        STORJ: '/images/token_icons/storjcoinx.png',
-        PAY: '/images/token_icons/tenx.png',
-        QTUM: '/images/token_icons/qtum.png',
-        DNT: '/images/token_icons/district0x.png',
-        SNGLS: '/images/token_icons/singularity.png',
-        EDG: '/images/token_icons/edgeless.png',
-        '1ST': '/images/token_icons/firstblood.jpg',
-        WINGS: '/images/token_icons/wings.png',
-        BQX: '/images/token_icons/bitquence.png',
-        LUN: '/images/token_icons/lunyr.png',
-        RLC: '/images/token_icons/iexec.png',
-        MCO: '/images/token_icons/monaco.png',
-        ADT: '/images/token_icons/adtoken.png',
-        CFI: '/images/token_icons/cofound-it.png',
-        ROL: '/images/token_icons/etheroll.png',
-        WGNT: '/images/token_icons/golem.png',
-        MTL: '/images/token_icons/metal.png',
-        NMR: '/images/token_icons/numeraire.png',
-        SAN: '/images/token_icons/santiment.png',
-        TAAS: '/images/token_icons/taas.png',
-        TKN: '/images/token_icons/tokencard.png',
-        TRST: '/images/token_icons/trust.png',
-    } as { [symbol: string]: string },
     GOOGLE_ANALYTICS_ID: 'UA-98720122-1',
     LAST_LOCAL_STORAGE_FILL_CLEARANCE_DATE: '2017-11-22',
-    LAST_LOCAL_STORAGE_TRACKED_TOKEN_CLEARANCE_DATE: '2018-6-25',
+    LAST_LOCAL_STORAGE_TRACKED_TOKEN_CLEARANCE_DATE: '2018-7-5',
     OUTDATED_WRAPPED_ETHERS: [
         {
             42: {
diff --git a/packages/website/ts/utils/utils.ts b/packages/website/ts/utils/utils.ts
index 623819fc9..8c76a7592 100644
--- a/packages/website/ts/utils/utils.ts
+++ b/packages/website/ts/utils/utils.ts
@@ -359,7 +359,9 @@ export const utils = {
     },
     isDogfood,
     shouldShowPortalV2(): boolean {
-        return this.isDevelopment() || this.isStaging() || this.isDogfood();
+        // return this.isDevelopment() || this.isStaging() || this.isDogfood();
+        // TODO: Remove this method entirely after launch.
+        return true;
     },
     shouldShowJobsPage(): boolean {
         return this.isDevelopment() || this.isStaging() || this.isDogfood();
@@ -381,9 +383,9 @@ export const utils = {
         return trackedTokens;
     },
     getFormattedAmountFromToken(token: Token, tokenState: TokenState): string {
-        return utils.getFormattedAmount(tokenState.balance, token.decimals, token.symbol);
+        return utils.getFormattedAmount(tokenState.balance, token.decimals);
     },
-    getFormattedAmount(amount: BigNumber, decimals: number, symbol: string): string {
+    getFormattedAmount(amount: BigNumber, decimals: number): string {
         const unitAmount = Web3Wrapper.toUnitAmount(amount, decimals);
         // if the unit amount is less than 1, show the natural number of decimal places with a max of 4
         // if the unit amount is greater than or equal to 1, show only 2 decimal places
@@ -392,7 +394,7 @@ export const utils = {
             : 2;
         const format = `0,0.${_.repeat('0', precision)}`;
         const formattedAmount = numeral(unitAmount).format(format);
-        return `${formattedAmount} ${symbol}`;
+        return formattedAmount;
     },
     getUsdValueFormattedAmount(amount: BigNumber, decimals: number, price: BigNumber): string {
         const unitAmount = Web3Wrapper.toUnitAmount(amount, decimals);
@@ -474,4 +476,8 @@ export const utils = {
         }
         return [downloadLink, isOnMobile];
     },
+    getTokenIconUrl(symbol: string): string {
+        const result = `/images/token_icons/${symbol}.png`;
+        return result;
+    },
 };