Merge branch 'feature/instant/prod-env-switches-cdn' into feature/instant/rollbar-env

166 files changed, 7426 insertions, 588 deletions

diff --git a/packages/0x.js/CHANGELOG.json b/packages/0x.js/CHANGELOG.json
index 9ff4183e7..4ee1e92be 100644
--- a/packages/0x.js/CHANGELOG.json
+++ b/packages/0x.js/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "2.0.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1542821676,
         "version": "2.0.5",
         "changes": [
diff --git a/packages/0x.js/CHANGELOG.md b/packages/0x.js/CHANGELOG.md
index 1f40bca7a..463ff923d 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
 
+## v2.0.6 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v2.0.5 - _November 21, 2018_
 
     * Dependencies updated
diff --git a/packages/0x.js/package.json b/packages/0x.js/package.json
index 3850e9038..aa038c302 100644
--- a/packages/0x.js/package.json
+++ b/packages/0x.js/package.json
@@ -1,6 +1,6 @@
 {
     "name": "0x.js",
-    "version": "2.0.5",
+    "version": "2.0.6",
     "engines": {
         "node": ">=6.12"
     },
@@ -42,10 +42,10 @@
     },
     "license": "Apache-2.0",
     "devDependencies": {
-        "@0x/abi-gen-wrappers": "^1.1.0",
-        "@0x/contract-addresses": "^1.2.0",
-        "@0x/dev-utils": "^1.0.18",
-        "@0x/migrations": "^2.1.0",
+        "@0x/abi-gen-wrappers": "^2.0.0",
+        "@0x/contract-addresses": "^2.0.0",
+        "@0x/dev-utils": "^1.0.19",
+        "@0x/migrations": "^2.2.0",
         "@0x/tslint-config": "^1.0.10",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
@@ -73,15 +73,15 @@
     },
     "dependencies": {
         "@0x/assert": "^1.0.18",
-        "@0x/base-contract": "^3.0.7",
-        "@0x/contract-wrappers": "^4.1.0",
-        "@0x/order-utils": "^3.0.3",
-        "@0x/order-watcher": "^2.2.5",
-        "@0x/subproviders": "^2.1.5",
+        "@0x/base-contract": "^3.0.8",
+        "@0x/contract-wrappers": "^4.1.1",
+        "@0x/order-utils": "^3.0.4",
+        "@0x/order-watcher": "^2.2.6",
+        "@0x/subproviders": "^2.1.6",
         "@0x/types": "^1.3.0",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "@types/web3-provider-engine": "^14.0.0",
         "ethereum-types": "^1.1.2",
         "ethers": "~4.0.4",
diff --git a/packages/abi-gen-templates/CHANGELOG.json b/packages/abi-gen-templates/CHANGELOG.json
index adf615b3b..baf852ad5 100644
--- a/packages/abi-gen-templates/CHANGELOG.json
+++ b/packages/abi-gen-templates/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "1.0.1",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "version": "1.0.0",
         "changes": [
             {
diff --git a/packages/abi-gen-templates/CHANGELOG.md b/packages/abi-gen-templates/CHANGELOG.md
new file mode 100644
index 000000000..1c3f21c6c
--- /dev/null
+++ b/packages/abi-gen-templates/CHANGELOG.md
@@ -0,0 +1,14 @@
+<!--
+changelogUtils.file is auto-generated using the monorepo-scripts package. Don't edit directly.
+Edit the package's CHANGELOG.json file only.
+-->
+
+CHANGELOG
+
+## v1.0.1 - _November 28, 2018_
+
+    * Dependencies updated
+
+## v1.0.0 - _Invalid date_
+
+    * Initial publish (#1305)
diff --git a/packages/abi-gen-templates/package.json b/packages/abi-gen-templates/package.json
index e06be6127..09872ab49 100644
--- a/packages/abi-gen-templates/package.json
+++ b/packages/abi-gen-templates/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/abi-gen-templates",
-    "version": "1.0.0",
+    "version": "1.0.1",
     "engines": {
         "node": ">=6.12"
     },
diff --git a/packages/abi-gen-wrappers/CHANGELOG.json b/packages/abi-gen-wrappers/CHANGELOG.json
index f74d98afa..6905a7537 100644
--- a/packages/abi-gen-wrappers/CHANGELOG.json
+++ b/packages/abi-gen-wrappers/CHANGELOG.json
@@ -6,7 +6,8 @@
                 "pr": 1309,
                 "note": "Update Exchange artifact to receive ZRX asset data as a constructor argument"
             }
-        ]
+        ],
+        "timestamp": 1543401373
     },
     {
         "version": "1.1.0",
diff --git a/packages/abi-gen-wrappers/CHANGELOG.md b/packages/abi-gen-wrappers/CHANGELOG.md
index 7d359f07b..30a10d6bd 100644
--- a/packages/abi-gen-wrappers/CHANGELOG.md
+++ b/packages/abi-gen-wrappers/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v2.0.0 - _November 28, 2018_
+
+    * Update Exchange artifact to receive ZRX asset data as a constructor argument (#1309)
+
 ## v1.1.0 - _November 21, 2018_
 
     * `deployFrom0xArtifactAsync` additionally accepts artifacts that conform to the `SimpleContractArtifact` interface (#1298)
diff --git a/packages/abi-gen-wrappers/package.json b/packages/abi-gen-wrappers/package.json
index 1b7015d55..e4f103cf7 100644
--- a/packages/abi-gen-wrappers/package.json
+++ b/packages/abi-gen-wrappers/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/abi-gen-wrappers",
-    "version": "1.1.0",
+    "version": "2.0.0",
     "engines": {
         "node": ">=6.12"
     },
@@ -31,18 +31,18 @@
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/abi-gen-wrappers/README.md",
     "devDependencies": {
         "@0x/abi-gen": "^1.0.17",
-        "@0x/abi-gen-templates": "^1.0.0",
+        "@0x/abi-gen-templates": "^1.0.1",
         "@0x/tslint-config": "^1.0.10",
         "@0x/types": "^1.3.0",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "ethereum-types": "^1.1.2",
         "ethers": "~4.0.4",
         "lodash": "^4.17.5",
         "shx": "^0.2.2"
     },
     "dependencies": {
-        "@0x/base-contract": "^3.0.7"
+        "@0x/base-contract": "^3.0.8"
     },
     "publishConfig": {
         "access": "public"
diff --git a/packages/asset-buyer/CHANGELOG.json b/packages/asset-buyer/CHANGELOG.json
index b7a83ccfc..28d3270e8 100644
--- a/packages/asset-buyer/CHANGELOG.json
+++ b/packages/asset-buyer/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "3.0.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "version": "3.0.1",
         "changes": [
             {
diff --git a/packages/asset-buyer/CHANGELOG.md b/packages/asset-buyer/CHANGELOG.md
index 20702a531..be3ef67d1 100644
--- a/packages/asset-buyer/CHANGELOG.md
+++ b/packages/asset-buyer/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v3.0.2 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v3.0.1 - _November 21, 2018_
 
     * Dependencies updated (#1276)
diff --git a/packages/asset-buyer/package.json b/packages/asset-buyer/package.json
index 50b276704..780b2e3e2 100644
--- a/packages/asset-buyer/package.json
+++ b/packages/asset-buyer/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/asset-buyer",
-    "version": "3.0.1",
+    "version": "3.0.2",
     "engines": {
         "node": ">=6.12"
     },
@@ -37,15 +37,15 @@
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/asset-buyer/README.md",
     "dependencies": {
         "@0x/assert": "^1.0.18",
-        "@0x/connect": "^3.0.7",
-        "@0x/contract-wrappers": "^4.1.0",
+        "@0x/connect": "^3.0.8",
+        "@0x/contract-wrappers": "^4.1.1",
         "@0x/json-schemas": "^2.1.2",
-        "@0x/order-utils": "^3.0.3",
-        "@0x/subproviders": "^2.1.5",
+        "@0x/order-utils": "^3.0.4",
+        "@0x/subproviders": "^2.1.6",
         "@0x/types": "^1.3.0",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "ethereum-types": "^1.1.2",
         "lodash": "^4.17.5"
     },
diff --git a/packages/base-contract/CHANGELOG.json b/packages/base-contract/CHANGELOG.json
index 66633136c..e4dff5530 100644
--- a/packages/base-contract/CHANGELOG.json
+++ b/packages/base-contract/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "3.0.8",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1542821676,
         "version": "3.0.7",
         "changes": [
diff --git a/packages/base-contract/CHANGELOG.md b/packages/base-contract/CHANGELOG.md
index 35032fc9f..f61b6c6ce 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
 
+## v3.0.8 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v3.0.7 - _November 21, 2018_
 
     * Dependencies updated
diff --git a/packages/base-contract/package.json b/packages/base-contract/package.json
index 2ae42d66b..2a331b3cb 100644
--- a/packages/base-contract/package.json
+++ b/packages/base-contract/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/base-contract",
-    "version": "3.0.7",
+    "version": "3.0.8",
     "engines": {
         "node": ">=6.12"
     },
@@ -42,7 +42,7 @@
     "dependencies": {
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "ethereum-types": "^1.1.2",
         "ethers": "~4.0.4",
         "lodash": "^4.17.5"
diff --git a/packages/connect/CHANGELOG.json b/packages/connect/CHANGELOG.json
index db9d8c92a..3abb895a7 100644
--- a/packages/connect/CHANGELOG.json
+++ b/packages/connect/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "3.0.8",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1542821676,
         "version": "3.0.7",
         "changes": [
diff --git a/packages/connect/CHANGELOG.md b/packages/connect/CHANGELOG.md
index 5e4013322..1dfc2672d 100644
--- a/packages/connect/CHANGELOG.md
+++ b/packages/connect/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v3.0.8 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v3.0.7 - _November 21, 2018_
 
     * Dependencies updated
diff --git a/packages/connect/package.json b/packages/connect/package.json
index d05f24463..2f3d30d84 100644
--- a/packages/connect/package.json
+++ b/packages/connect/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/connect",
-    "version": "3.0.7",
+    "version": "3.0.8",
     "engines": {
         "node": ">=6.12"
     },
@@ -46,7 +46,7 @@
     "dependencies": {
         "@0x/assert": "^1.0.18",
         "@0x/json-schemas": "^2.1.2",
-        "@0x/order-utils": "^3.0.3",
+        "@0x/order-utils": "^3.0.4",
         "@0x/types": "^1.3.0",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
diff --git a/packages/contract-addresses/CHANGELOG.json b/packages/contract-addresses/CHANGELOG.json
index e65351c7e..21ffaf510 100644
--- a/packages/contract-addresses/CHANGELOG.json
+++ b/packages/contract-addresses/CHANGELOG.json
@@ -1,5 +1,19 @@
 [
     {
+        "version": "2.0.0",
+        "changes": [
+            {
+                "note": "Redeployed Rinkeby with testnet Exchange artifact",
+                "pr": 1318
+            },
+            {
+                "note": "Added Ganache snapshot addresses for network 50",
+                "pr": 1318
+            }
+        ],
+        "timestamp": 1543401373
+    },
+    {
         "version": "1.2.0",
         "changes": [
             {
diff --git a/packages/contract-addresses/CHANGELOG.md b/packages/contract-addresses/CHANGELOG.md
index 9801831f7..c006c3b22 100644
--- a/packages/contract-addresses/CHANGELOG.md
+++ b/packages/contract-addresses/CHANGELOG.md
@@ -5,6 +5,11 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v2.0.0 - _November 28, 2018_
+
+    * Redeployed Rinkeby with testnet Exchange artifact (#1318)
+    * Added Ganache snapshot addresses for network 50 (#1318)
+
 ## v1.2.0 - _November 21, 2018_
 
     * Rinkeby Deployment
diff --git a/packages/contract-addresses/package.json b/packages/contract-addresses/package.json
index 9f0db4d30..c75ae6efa 100644
--- a/packages/contract-addresses/package.json
+++ b/packages/contract-addresses/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/contract-addresses",
-    "version": "1.2.0",
+    "version": "2.0.0",
     "engines": {
         "node": ">=6.12"
     },
diff --git a/packages/contract-addresses/src/index.ts b/packages/contract-addresses/src/index.ts
index 57358dd38..7989631e3 100644
--- a/packages/contract-addresses/src/index.ts
+++ b/packages/contract-addresses/src/index.ts
@@ -16,6 +16,7 @@ export enum NetworkId {
     Ropsten = 3,
     Rinkeby = 4,
     Kovan = 42,
+    Ganache = 50,
 }
 
 const networkToAddresses: { [networkId: number]: ContractAddresses } = {
@@ -40,14 +41,14 @@ const networkToAddresses: { [networkId: number]: ContractAddresses } = {
         orderValidator: '0x90431a90516ab49af23a0530e04e8c7836e7122f',
     },
     4: {
-        erc20Proxy: '0x3e809c563c15a295e832e37053798ddc8d6c8dab',
-        erc721Proxy: '0x8e1ff02637cb5e39f2fa36c14706aa348b065b09',
-        zrxToken: '0x2727e688b8fd40b198cd5fe6e408e00494a06f07',
+        exchange: '0xbce0b5f6eb618c565c3e5f5cd69652bbc279f44e',
+        erc20Proxy: '0x2f5ae4f6106e89b4147651688a92256885c5f410',
+        erc721Proxy: '0x7656d773e11ff7383a14dcf09a9c50990481cd10',
+        zrxToken: '0x8080c7e4b81ecf23aa6f877cfbfd9b0c228c6ffa',
         etherToken: '0xc778417e063141139fce010982780140aa0cd5ab',
-        exchange: '0x22ebc052f43a88efa06379426120718170f2204e',
-        assetProxyOwner: '0x1da52d1d3a3acfa0a1836b737393b4e9931268fc',
-        forwarder: '0xd2dbf3250a764eaaa94fa0c84ed87c0edc8ed04e',
-        orderValidator: '0x39c3fc9f4d8430af2713306ce80c584752d9e1c7',
+        assetProxyOwner: '0xe1703da878afcebff5b7624a826902af475b9c03',
+        forwarder: '0x2d40589abbdee84961f3a7656b9af7adb0ee5ab4',
+        orderValidator: '0x0c5173a51e26b29d6126c686756fb9fbef71f762',
     },
     42: {
         erc20Proxy: '0xf1ec01d6236d3cd881a0bf0130ea25fe4234003e',
@@ -59,6 +60,17 @@ const networkToAddresses: { [networkId: number]: ContractAddresses } = {
         forwarder: '0x17992e4ffb22730138e4b62aaa6367fa9d3699a6',
         orderValidator: '0xb389da3d204b412df2f75c6afb3d0a7ce0bc283d',
     },
+    // NetworkId 50 represents our Ganache snapshot generated from migrations.
+    50: {
+        exchange: '0x48bacb9266a570d521063ef5dd96e61686dbe788',
+        erc20Proxy: '0x1dc4c1cefef38a777b15aa20260a54e584b16c48',
+        erc721Proxy: '0x1d7022f5b17d2f8b695918fb48fa1089c9f85401',
+        zrxToken: '0x871dd7c2b4b25e1aa18728e9d5f2af4c4e431f5c',
+        etherToken: '0x0b1ba0af832d7c05fd64161e0db78e85978e8082',
+        assetProxyOwner: '0x34d402f14d58e001d8efbe6585051bf9706aa064',
+        forwarder: '0xb69e673309512a9d726f87304c6984054f87a93b',
+        orderValidator: '0xe86bb98fcf9bff3512c74589b78fb168200cc546',
+    },
 };
 
 /**
diff --git a/packages/contract-artifacts/CHANGELOG.json b/packages/contract-artifacts/CHANGELOG.json
index b75ad5766..03c88e71a 100644
--- a/packages/contract-artifacts/CHANGELOG.json
+++ b/packages/contract-artifacts/CHANGELOG.json
@@ -6,7 +6,8 @@
                 "pr": 1309,
                 "note": "Update Exchange artifact to receive ZRX asset data as a constructor argument"
             }
-        ]
+        ],
+        "timestamp": 1543401373
     },
     {
         "version": "1.1.0",
diff --git a/packages/contract-artifacts/CHANGELOG.md b/packages/contract-artifacts/CHANGELOG.md
index b3c399985..9e48058f5 100644
--- a/packages/contract-artifacts/CHANGELOG.md
+++ b/packages/contract-artifacts/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.1.2 - _November 28, 2018_
+
+    * Update Exchange artifact to receive ZRX asset data as a constructor argument (#1309)
+
 ## v1.1.0 - _November 9, 2018_
 
     * Update Forwarder artifact (#1192)
diff --git a/packages/contract-artifacts/package.json b/packages/contract-artifacts/package.json
index 9c25e3ac5..71d887545 100644
--- a/packages/contract-artifacts/package.json
+++ b/packages/contract-artifacts/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/contract-artifacts",
-    "version": "1.1.0",
+    "version": "1.1.2",
     "engines": {
         "node": ">=6.12"
     },
diff --git a/packages/contract-wrappers/CHANGELOG.json b/packages/contract-wrappers/CHANGELOG.json
index 711ab49a1..006a0904d 100644
--- a/packages/contract-wrappers/CHANGELOG.json
+++ b/packages/contract-wrappers/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "4.1.1",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "version": "4.1.0",
         "changes": [
             {
diff --git a/packages/contract-wrappers/CHANGELOG.md b/packages/contract-wrappers/CHANGELOG.md
index 201c65a4c..ebdcc9638 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
 
+## v4.1.1 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v4.1.0 - _November 21, 2018_
 
     * Add a `nonce` field for `TxOpts` so that it's now possible to re-broadcast stuck transactions with a higher gas amount (#1292)
diff --git a/packages/contract-wrappers/package.json b/packages/contract-wrappers/package.json
index 999375ea5..e11d1a63e 100644
--- a/packages/contract-wrappers/package.json
+++ b/packages/contract-wrappers/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/contract-wrappers",
-    "version": "4.1.0",
+    "version": "4.1.1",
     "description": "Smart TS wrappers for 0x smart contracts",
     "keywords": [
         "0xproject",
@@ -37,9 +37,9 @@
         "node": ">=6.0.0"
     },
     "devDependencies": {
-        "@0x/dev-utils": "^1.0.18",
-        "@0x/migrations": "^2.1.0",
-        "@0x/subproviders": "^2.1.5",
+        "@0x/dev-utils": "^1.0.19",
+        "@0x/migrations": "^2.2.0",
+        "@0x/subproviders": "^2.1.6",
         "@0x/tslint-config": "^1.0.10",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
@@ -65,17 +65,17 @@
         "web3-provider-engine": "14.0.6"
     },
     "dependencies": {
-        "@0x/abi-gen-wrappers": "^1.1.0",
+        "@0x/abi-gen-wrappers": "^2.0.0",
         "@0x/assert": "^1.0.18",
-        "@0x/contract-addresses": "^1.2.0",
-        "@0x/contract-artifacts": "^1.1.0",
-        "@0x/fill-scenarios": "^1.0.13",
+        "@0x/contract-addresses": "^2.0.0",
+        "@0x/contract-artifacts": "^1.1.2",
+        "@0x/fill-scenarios": "^1.0.14",
         "@0x/json-schemas": "^2.1.2",
-        "@0x/order-utils": "^3.0.3",
+        "@0x/order-utils": "^3.0.4",
         "@0x/types": "^1.3.0",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "ethereum-types": "^1.1.2",
         "ethereumjs-blockstream": "6.0.0",
         "ethereumjs-util": "^5.1.1",
diff --git a/packages/contracts/CHANGELOG.json b/packages/contracts/CHANGELOG.json
index 3f57a33d6..7dfa06990 100644
--- a/packages/contracts/CHANGELOG.json
+++ b/packages/contracts/CHANGELOG.json
@@ -1,5 +1,25 @@
 [
     {
+        "name": "MultiAssetProxy",
+        "version": "1.0.0",
+        "changes": [
+            {
+                "note": "Add MultiAssetProxy implementation",
+                "pr": 1224
+            }
+        ]
+    },
+    {
+        "name": "OrderValidator",
+        "version": "1.0.1",
+        "changes": [
+            {
+                "note": "remove `getApproved` check from ERC721 approval query",
+                "pr": 1149
+            }
+        ]
+    },
+    {
         "name": "Forwarder",
         "version": "1.1.0",
         "changes": [
diff --git a/packages/contracts/compiler.json b/packages/contracts/compiler.json
index af3980b4e..c824e4645 100644
--- a/packages/contracts/compiler.json
+++ b/packages/contracts/compiler.json
@@ -38,6 +38,7 @@
         "IValidator",
         "IWallet",
         "MixinAuthorizable",
+        "MultiAssetProxy",
         "MultiSigWallet",
         "MultiSigWalletWithTimeLock",
         "OrderValidator",
diff --git a/packages/contracts/contracts/extensions/OrderValidator/OrderValidator.sol b/packages/contracts/contracts/extensions/OrderValidator/OrderValidator.sol
index 8bfde3847..3385d35ef 100644
--- a/packages/contracts/contracts/extensions/OrderValidator/OrderValidator.sol
+++ b/packages/contracts/contracts/extensions/OrderValidator/OrderValidator.sol
@@ -148,7 +148,7 @@ contract OrderValidator {
             balance = target == owner ? 1 : 0;
 
             // Check if ERC721Proxy is approved to spend tokenId
-            bool isApproved = IERC721Token(token).isApprovedForAll(target, assetProxy) || IERC721Token(token).getApproved(tokenId) == assetProxy;
+            bool isApproved = IERC721Token(token).isApprovedForAll(target, assetProxy);
             
             // Set alowance to 1 if ERC721Proxy is approved to spend tokenId
             allowance = isApproved ? 1 : 0;
diff --git a/packages/contracts/contracts/protocol/AssetProxy/MultiAssetProxy.sol b/packages/contracts/contracts/protocol/AssetProxy/MultiAssetProxy.sol
new file mode 100644
index 000000000..42231e73b
--- /dev/null
+++ b/packages/contracts/contracts/protocol/AssetProxy/MultiAssetProxy.sol
@@ -0,0 +1,300 @@
+/*
+
+  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 "../Exchange/MixinAssetProxyDispatcher.sol";
+import "./MixinAuthorizable.sol";
+
+
+contract MultiAssetProxy is
+    MixinAssetProxyDispatcher,
+    MixinAuthorizable
+{
+    // Id of this proxy.
+    bytes4 constant internal PROXY_ID = bytes4(keccak256("MultiAsset(uint256[],bytes[])"));
+
+    // solhint-disable-next-line payable-fallback
+    function ()
+        external
+    {
+        assembly {
+            // The first 4 bytes of calldata holds the function selector
+            let selector := and(calldataload(0), 0xffffffff00000000000000000000000000000000000000000000000000000000)
+
+            // `transferFrom` will be called with the following parameters:
+            // assetData Encoded byte array.
+            // from Address to transfer asset from.
+            // to Address to transfer asset to.
+            // amount Amount of asset to transfer.
+            // bytes4(keccak256("transferFrom(bytes,address,address,uint256)")) = 0xa85e59e4
+            if eq(selector, 0xa85e59e400000000000000000000000000000000000000000000000000000000) {
+
+                // To lookup a value in a mapping, we load from the storage location keccak256(k, p),
+                // where k is the key left padded to 32 bytes and p is the storage slot
+                mstore(0, caller)
+                mstore(32, authorized_slot)
+
+                // Revert if authorized[msg.sender] == false
+                if iszero(sload(keccak256(0, 64))) {
+                    // Revert with `Error("SENDER_NOT_AUTHORIZED")`
+                    mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
+                    mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
+                    mstore(64, 0x0000001553454e4445525f4e4f545f415554484f52495a454400000000000000)
+                    mstore(96, 0)
+                    revert(0, 100)
+                }
+
+                // `transferFrom`.
+                // The function is marked `external`, so no abi decoding is done for
+                // us. Instead, we expect the `calldata` memory to contain the
+                // following:
+                //
+                // | Area     | Offset | Length  | Contents                            |
+                // |----------|--------|---------|-------------------------------------|
+                // | Header   | 0      | 4       | function selector                   |
+                // | Params   |        | 4 * 32  | function parameters:                |
+                // |          | 4      |         |   1. offset to assetData (*)        |
+                // |          | 36     |         |   2. from                           |
+                // |          | 68     |         |   3. to                             |
+                // |          | 100    |         |   4. amount                         |
+                // | Data     |        |         | assetData:                          |
+                // |          | 132    | 32      | assetData Length                    |
+                // |          | 164    | **      | assetData Contents                  |
+                //
+                // (*): offset is computed from start of function parameters, so offset
+                //      by an additional 4 bytes in the calldata.
+                //
+                // (**): see table below to compute length of assetData Contents
+                //
+                // WARNING: The ABIv2 specification allows additional padding between
+                //          the Params and Data section. This will result in a larger
+                //          offset to assetData.
+
+                // Load offset to `assetData`
+                let assetDataOffset := calldataload(4)
+
+                // Asset data itself is encoded as follows:
+                //
+                // | Area     | Offset      | Length  | Contents                            |
+                // |----------|-------------|---------|-------------------------------------|
+                // | Header   | 0           | 4       | assetProxyId                        |
+                // | Params   |             | 2 * 32  | function parameters:                |
+                // |          | 4           |         |   1. offset to amounts (*)          |
+                // |          | 36          |         |   2. offset to nestedAssetData (*)  |
+                // | Data     |             |         | amounts:                            |
+                // |          | 68          | 32      | amounts Length                      |
+                // |          | 100         | a       | amounts Contents                    | 
+                // |          |             |         | nestedAssetData:                    |
+                // |          | 100 + a     | 32      | nestedAssetData Length              |
+                // |          | 132 + a     | b       | nestedAssetData Contents (offsets)  |
+                // |          | 132 + a + b |         | nestedAssetData[0, ..., len]        |
+
+                // In order to find the offset to `amounts`, we must add:
+                // 4 (function selector)
+                // + assetDataOffset
+                // + 32 (assetData len)
+                // + 4 (assetProxyId)
+                let amountsOffset := calldataload(add(assetDataOffset, 40))
+
+                // In order to find the offset to `nestedAssetData`, we must add:
+                // 4 (function selector)
+                // + assetDataOffset
+                // + 32 (assetData len)
+                // + 4 (assetProxyId)
+                // + 32 (amounts offset)
+                let nestedAssetDataOffset := calldataload(add(assetDataOffset, 72))
+
+                // In order to find the start of the `amounts` contents, we must add: 
+                // 4 (function selector) 
+                // + assetDataOffset 
+                // + 32 (assetData len)
+                // + 4 (assetProxyId)
+                // + amountsOffset
+                // + 32 (amounts len)
+                let amountsContentsStart := add(assetDataOffset, add(amountsOffset, 72))
+
+                // Load number of elements in `amounts`
+                let amountsLen := calldataload(sub(amountsContentsStart, 32))
+
+                // In order to find the start of the `nestedAssetData` contents, we must add: 
+                // 4 (function selector) 
+                // + assetDataOffset 
+                // + 32 (assetData len)
+                // + 4 (assetProxyId)
+                // + nestedAssetDataOffset
+                // + 32 (nestedAssetData len)
+                let nestedAssetDataContentsStart := add(assetDataOffset, add(nestedAssetDataOffset, 72))
+
+                // Load number of elements in `nestedAssetData`
+                let nestedAssetDataLen := calldataload(sub(nestedAssetDataContentsStart, 32))
+
+                // Revert if number of elements in `amounts` differs from number of elements in `nestedAssetData`
+                if iszero(eq(amountsLen, nestedAssetDataLen)) {
+                    // Revert with `Error("LENGTH_MISMATCH")`
+                    mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
+                    mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
+                    mstore(64, 0x0000000f4c454e4754485f4d49534d4154434800000000000000000000000000)
+                    mstore(96, 0)
+                    revert(0, 100)
+                }
+
+                // Copy `transferFrom` selector, offset to `assetData`, `from`, and `to` from calldata to memory
+                calldatacopy(
+                    0,   // memory can safely be overwritten from beginning
+                    0,   // start of calldata
+                    100  // length of selector (4) and 3 params (32 * 3)
+                )
+
+                // Overwrite existing offset to `assetData` with our own
+                mstore(4, 128)
+                
+                // Load `amount`
+                let amount := calldataload(100)
+        
+                // Calculate number of bytes in `amounts` contents
+                let amountsByteLen := mul(amountsLen, 32)
+
+                // Initialize `assetProxyId` and `assetProxy` to 0
+                let assetProxyId := 0
+                let assetProxy := 0
+
+                // Loop through `amounts` and `nestedAssetData`, calling `transferFrom` for each respective element
+                for {let i := 0} lt(i, amountsByteLen) {i := add(i, 32)} {
+
+                    // Calculate the total amount
+                    let amountsElement := calldataload(add(amountsContentsStart, i))
+                    let totalAmount := mul(amountsElement, amount)
+
+                    // Revert if multiplication resulted in an overflow
+                    if iszero(eq(div(totalAmount, amount), amountsElement)) {
+                        // Revert with `Error("UINT256_OVERFLOW")`
+                        mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
+                        mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
+                        mstore(64, 0x0000001055494e543235365f4f564552464c4f57000000000000000000000000)
+                        mstore(96, 0)
+                        revert(0, 100)
+                    }
+
+                    // Write `totalAmount` to memory
+                    mstore(100, totalAmount)
+
+                    // Load offset to `nestedAssetData[i]`
+                    let nestedAssetDataElementOffset := calldataload(add(nestedAssetDataContentsStart, i))
+
+                    // In order to find the start of the `nestedAssetData[i]` contents, we must add:
+                    // 4 (function selector) 
+                    // + assetDataOffset 
+                    // + 32 (assetData len)
+                    // + 4 (assetProxyId)
+                    // + nestedAssetDataOffset
+                    // + 32 (nestedAssetData len)
+                    // + nestedAssetDataElementOffset
+                    // + 32 (nestedAssetDataElement len)
+                    let nestedAssetDataElementContentsStart := add(assetDataOffset, add(nestedAssetDataOffset, add(nestedAssetDataElementOffset, 104)))
+
+                    // Load length of `nestedAssetData[i]`
+                    let nestedAssetDataElementLenStart := sub(nestedAssetDataElementContentsStart, 32)
+                    let nestedAssetDataElementLen := calldataload(nestedAssetDataElementLenStart)
+
+                    // Revert if the `nestedAssetData` does not contain a 4 byte `assetProxyId`
+                    if lt(nestedAssetDataElementLen, 4) {
+                        // Revert with `Error("LENGTH_GREATER_THAN_3_REQUIRED")`
+                        mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
+                        mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
+                        mstore(64, 0x0000001e4c454e4754485f475245415445525f5448414e5f335f524551554952)
+                        mstore(96, 0x4544000000000000000000000000000000000000000000000000000000000000)
+                        revert(0, 100)
+                    }
+
+                    // Load AssetProxy id
+                    let currentAssetProxyId := and(
+                        calldataload(nestedAssetDataElementContentsStart),
+                        0xffffffff00000000000000000000000000000000000000000000000000000000
+                    )
+
+                    // Only load `assetProxy` if `currentAssetProxyId` does not equal `assetProxyId`
+                    // We do not need to check if `currentAssetProxyId` is 0 since `assetProxy` is also initialized to 0
+                    if iszero(eq(currentAssetProxyId, assetProxyId)) {
+                        // Update `assetProxyId`
+                        assetProxyId := currentAssetProxyId
+                        // To lookup a value in a mapping, we load from the storage location keccak256(k, p),
+                        // where k is the key left padded to 32 bytes and p is the storage slot
+                        mstore(132, assetProxyId)
+                        mstore(164, assetProxies_slot)
+                        assetProxy := sload(keccak256(132, 64))
+                    }
+                    
+                    // Revert if AssetProxy with given id does not exist
+                    if iszero(assetProxy) {
+                        // Revert with `Error("ASSET_PROXY_DOES_NOT_EXIST")`
+                        mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
+                        mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
+                        mstore(64, 0x0000001a41535345545f50524f58595f444f45535f4e4f545f45584953540000)
+                        mstore(96, 0)
+                        revert(0, 100)
+                    }
+    
+                    // Copy `nestedAssetData[i]` from calldata to memory
+                    calldatacopy(
+                        132,                                // memory slot after `amounts[i]`
+                        nestedAssetDataElementLenStart,     // location of `nestedAssetData[i]` in calldata
+                        add(nestedAssetDataElementLen, 32)  // `nestedAssetData[i].length` plus 32 byte length
+                    )
+
+                    // call `assetProxy.transferFrom`
+                    let success := call(
+                        gas,                                    // forward all gas
+                        assetProxy,                             // call address of asset proxy
+                        0,                                      // don't send any ETH
+                        0,                                      // pointer to start of input
+                        add(164, nestedAssetDataElementLen),    // length of input  
+                        0,                                      // write output over memory that won't be reused
+                        0                                       // don't copy output to memory
+                    )
+
+                    // Revert with reason given by AssetProxy if `transferFrom` call failed
+                    if iszero(success) {
+                        returndatacopy(
+                            0,                // copy to memory at 0
+                            0,                // copy from return data at 0
+                            returndatasize()  // copy all return data
+                        )
+                        revert(0, returndatasize())
+                    }
+                }
+
+                // Return if no `transferFrom` calls reverted
+                return(0, 0)
+            }
+
+            // Revert if undefined function is called
+            revert(0, 0)
+        }
+    }
+
+    /// @dev Gets the proxy id associated with the proxy address.
+    /// @return Proxy id.
+    function getProxyId()
+        external
+        pure
+        returns (bytes4)
+    {
+        return PROXY_ID;
+    }
+}
diff --git a/packages/contracts/contracts/protocol/AssetProxy/interfaces/IAssetData.sol b/packages/contracts/contracts/protocol/AssetProxy/interfaces/IAssetData.sol
index 3e76e38dd..e2da68919 100644
--- a/packages/contracts/contracts/protocol/AssetProxy/interfaces/IAssetData.sol
+++ b/packages/contracts/contracts/protocol/AssetProxy/interfaces/IAssetData.sol
@@ -18,6 +18,7 @@
 
 // solhint-disable
 pragma solidity 0.4.24;
+pragma experimental ABIEncoderV2;
 
 
 // @dev Interface of the asset proxy's assetData.
@@ -26,15 +27,18 @@ pragma solidity 0.4.24;
 interface IAssetData {
 
     function ERC20Token(address tokenContract)
-        external
-        pure;
+        external;
     
     function ERC721Token(
         address tokenContract,
-        uint256 tokenId,
-        bytes receiverData
+        uint256 tokenId
     )
-        external
-        pure;
+        external;
+
+    function MultiAsset(
+        uint256[] amounts,
+        bytes[] nestedAssetData
+    )
+        external;
     
 }
diff --git a/packages/contracts/package.json b/packages/contracts/package.json
index 25445c4f8..16dd3c9c1 100644
--- a/packages/contracts/package.json
+++ b/packages/contracts/package.json
@@ -1,7 +1,7 @@
 {
     "private": true,
     "name": "contracts",
-    "version": "2.1.55",
+    "version": "2.1.56",
     "engines": {
         "node": ">=6.12"
     },
@@ -19,7 +19,8 @@
         "test:coverage": "SOLIDITY_COVERAGE=true run-s build run_mocha coverage:report:text coverage:report:lcov",
         "test:profiler": "SOLIDITY_PROFILER=true run-s build run_mocha profiler:report:html",
         "test:trace": "SOLIDITY_REVERT_TRACE=true run-s build run_mocha",
-        "run_mocha": "mocha --require source-map-support/register --require make-promises-safe 'lib/test/**/*.js' --timeout 100000 --bail --exit",
+        "run_mocha":
+            "mocha --require source-map-support/register --require make-promises-safe 'lib/test/**/*.js' --timeout 100000 --bail --exit",
         "compile": "sol-compiler --contracts-dir contracts",
         "clean": "shx rm -rf lib generated-artifacts generated-wrappers",
         "generate_contract_wrappers": "abi-gen --abis  ${npm_package_config_abis} --template ../../node_modules/@0x/abi-gen-templates/contract.handlebars --partials '../../node_modules/@0x/abi-gen-templates/partials/**/*.handlebars' --output generated-wrappers --backend ethers",
@@ -32,7 +33,8 @@
         "lint-contracts": "solhint contracts/**/**/**/**/*.sol"
     },
     "config": {
-        "abis": "generated-artifacts/@(AssetProxyOwner|DummyERC20Token|DummyERC721Receiver|DummyERC721Token|DummyMultipleReturnERC20Token|DummyNoReturnERC20Token|ERC20Token|ERC20Proxy|ERC721Token|ERC721Proxy|Forwarder|Exchange|ExchangeWrapper|IAssetData|IAssetProxy|InvalidERC721Receiver|MixinAuthorizable|MultiSigWallet|MultiSigWalletWithTimeLock|OrderValidator|ReentrantERC20Token|TestAssetProxyOwner|TestAssetProxyDispatcher|TestConstants|TestExchangeInternals|TestLibBytes|TestLibs|TestSignatureValidator|TestStaticCallReceiver|Validator|Wallet|Whitelist|WETH9|ZRXToken).json"
+        "abis":
+            "generated-artifacts/@(AssetProxyOwner|DummyERC20Token|DummyERC721Receiver|DummyERC721Token|DummyMultipleReturnERC20Token|DummyNoReturnERC20Token|ERC20Token|ERC20Proxy|ERC721Token|ERC721Proxy|Forwarder|Exchange|ExchangeWrapper|IAssetData|IAssetProxy|InvalidERC721Receiver|MixinAuthorizable|MultiAssetProxy|MultiSigWallet|MultiSigWalletWithTimeLock|OrderValidator|ReentrantERC20Token|TestAssetProxyOwner|TestAssetProxyDispatcher|TestConstants|TestExchangeInternals|TestLibBytes|TestLibs|TestSignatureValidator|TestStaticCallReceiver|Validator|Wallet|Whitelist|WETH9|ZRXToken).json"
     },
     "repository": {
         "type": "git",
@@ -46,10 +48,10 @@
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/contracts/README.md",
     "devDependencies": {
         "@0x/abi-gen": "^1.0.17",
-        "@0x/dev-utils": "^1.0.18",
-        "@0x/sol-compiler": "^1.1.13",
-        "@0x/sol-cov": "^2.1.13",
-        "@0x/subproviders": "^2.1.5",
+        "@0x/dev-utils": "^1.0.19",
+        "@0x/sol-compiler": "^1.1.14",
+        "@0x/sol-cov": "^2.1.14",
+        "@0x/subproviders": "^2.1.6",
         "@0x/tslint-config": "^1.0.10",
         "@types/bn.js": "^4.11.0",
         "@types/ethereumjs-abi": "^0.6.0",
@@ -71,12 +73,12 @@
         "yargs": "^10.0.3"
     },
     "dependencies": {
-        "@0x/base-contract": "^3.0.7",
-        "@0x/order-utils": "^3.0.3",
+        "@0x/base-contract": "^3.0.8",
+        "@0x/order-utils": "^3.0.4",
         "@0x/types": "^1.3.0",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "@types/js-combinatorics": "^0.5.29",
         "bn.js": "^4.11.8",
         "ethereum-types": "^1.1.2",
diff --git a/packages/contracts/src/artifacts/index.ts b/packages/contracts/src/artifacts/index.ts
index c30972a91..97c1b6209 100644
--- a/packages/contracts/src/artifacts/index.ts
+++ b/packages/contracts/src/artifacts/index.ts
@@ -19,6 +19,7 @@ import * as InvalidERC721Receiver from '../../generated-artifacts/InvalidERC721R
 import * as IValidator from '../../generated-artifacts/IValidator.json';
 import * as IWallet from '../../generated-artifacts/IWallet.json';
 import * as MixinAuthorizable from '../../generated-artifacts/MixinAuthorizable.json';
+import * as MultiAssetProxy from '../../generated-artifacts/MultiAssetProxy.json';
 import * as MultiSigWallet from '../../generated-artifacts/MultiSigWallet.json';
 import * as MultiSigWalletWithTimeLock from '../../generated-artifacts/MultiSigWalletWithTimeLock.json';
 import * as OrderValidator from '../../generated-artifacts/OrderValidator.json';
@@ -57,6 +58,7 @@ export const artifacts = {
     IWallet: IWallet as ContractArtifact,
     InvalidERC721Receiver: InvalidERC721Receiver as ContractArtifact,
     MixinAuthorizable: MixinAuthorizable as ContractArtifact,
+    MultiAssetProxy: MultiAssetProxy as ContractArtifact,
     MultiSigWallet: MultiSigWallet as ContractArtifact,
     MultiSigWalletWithTimeLock: MultiSigWalletWithTimeLock as ContractArtifact,
     OrderValidator: OrderValidator as ContractArtifact,
diff --git a/packages/contracts/test/asset_proxy/proxies.ts b/packages/contracts/test/asset_proxy/proxies.ts
index b8305993e..8fa1e602a 100644
--- a/packages/contracts/test/asset_proxy/proxies.ts
+++ b/packages/contracts/test/asset_proxy/proxies.ts
@@ -12,7 +12,9 @@ import { DummyMultipleReturnERC20TokenContract } from '../../generated-wrappers/
 import { DummyNoReturnERC20TokenContract } from '../../generated-wrappers/dummy_no_return_erc20_token';
 import { ERC20ProxyContract } from '../../generated-wrappers/erc20_proxy';
 import { ERC721ProxyContract } from '../../generated-wrappers/erc721_proxy';
+import { IAssetDataContract } from '../../generated-wrappers/i_asset_data';
 import { IAssetProxyContract } from '../../generated-wrappers/i_asset_proxy';
+import { MultiAssetProxyContract } from '../../generated-wrappers/multi_asset_proxy';
 import { artifacts } from '../../src/artifacts';
 import { expectTransactionFailedAsync, expectTransactionFailedWithoutReasonAsync } from '../utils/assertions';
 import { chaiSetup } from '../utils/chai_setup';
@@ -30,26 +32,35 @@ const assetProxyInterface = new IAssetProxyContract(
     constants.NULL_ADDRESS,
     provider,
 );
+const assetDataInterface = new IAssetDataContract(
+    artifacts.IAssetData.compilerOutput.abi,
+    constants.NULL_ADDRESS,
+    provider,
+);
 
 // tslint:disable:no-unnecessary-type-assertion
 describe('Asset Transfer Proxies', () => {
     let owner: string;
     let notAuthorized: string;
-    let exchangeAddress: string;
-    let makerAddress: string;
-    let takerAddress: string;
+    let authorized: string;
+    let fromAddress: string;
+    let toAddress: string;
 
-    let zrxToken: DummyERC20TokenContract;
-    let erc721Token: DummyERC721TokenContract;
+    let erc20TokenA: DummyERC20TokenContract;
+    let erc20TokenB: DummyERC20TokenContract;
+    let erc721TokenA: DummyERC721TokenContract;
+    let erc721TokenB: DummyERC721TokenContract;
     let erc721Receiver: DummyERC721ReceiverContract;
     let erc20Proxy: ERC20ProxyContract;
     let erc721Proxy: ERC721ProxyContract;
     let noReturnErc20Token: DummyNoReturnERC20TokenContract;
     let multipleReturnErc20Token: DummyMultipleReturnERC20TokenContract;
+    let multiAssetProxy: MultiAssetProxyContract;
 
     let erc20Wrapper: ERC20Wrapper;
     let erc721Wrapper: ERC721Wrapper;
-    let erc721MakerTokenId: BigNumber;
+    let erc721AFromTokenId: BigNumber;
+    let erc721BFromTokenId: BigNumber;
 
     before(async () => {
         await blockchainLifecycle.startAsync();
@@ -59,41 +70,73 @@ describe('Asset Transfer Proxies', () => {
     });
     before(async () => {
         const accounts = await web3Wrapper.getAvailableAddressesAsync();
-        const usedAddresses = ([owner, notAuthorized, exchangeAddress, makerAddress, takerAddress] = _.slice(
-            accounts,
-            0,
-            5,
-        ));
+        const usedAddresses = ([owner, notAuthorized, authorized, fromAddress, toAddress] = _.slice(accounts, 0, 5));
 
         erc20Wrapper = new ERC20Wrapper(provider, usedAddresses, owner);
         erc721Wrapper = new ERC721Wrapper(provider, usedAddresses, owner);
 
-        const numDummyErc20ToDeploy = 1;
-        [zrxToken] = await erc20Wrapper.deployDummyTokensAsync(numDummyErc20ToDeploy, constants.DUMMY_TOKEN_DECIMALS);
+        // Deploy AssetProxies
         erc20Proxy = await erc20Wrapper.deployProxyAsync();
-        await erc20Wrapper.setBalancesAndAllowancesAsync();
+        erc721Proxy = await erc721Wrapper.deployProxyAsync();
+        multiAssetProxy = await MultiAssetProxyContract.deployFrom0xArtifactAsync(
+            artifacts.MultiAssetProxy,
+            provider,
+            txDefaults,
+        );
+
+        // Configure ERC20Proxy
         await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(exchangeAddress, {
+            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(authorized, {
+                from: owner,
+            }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(multiAssetProxy.address, {
                 from: owner,
             }),
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
 
-        [erc721Token] = await erc721Wrapper.deployDummyTokensAsync();
-        erc721Proxy = await erc721Wrapper.deployProxyAsync();
-        await erc721Wrapper.setBalancesAndAllowancesAsync();
-        const erc721Balances = await erc721Wrapper.getBalancesAsync();
-        erc721MakerTokenId = erc721Balances[makerAddress][erc721Token.address][0];
+        // Configure ERC721Proxy
         await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(exchangeAddress, {
+            await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(authorized, {
                 from: owner,
             }),
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
-        erc721Receiver = await DummyERC721ReceiverContract.deployFrom0xArtifactAsync(
-            artifacts.DummyERC721Receiver,
-            provider,
-            txDefaults,
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(multiAssetProxy.address, {
+                from: owner,
+            }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+
+        // Configure MultiAssetProxy
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await multiAssetProxy.addAuthorizedAddress.sendTransactionAsync(authorized, {
+                from: owner,
+            }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await multiAssetProxy.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, {
+                from: owner,
+            }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await multiAssetProxy.registerAssetProxy.sendTransactionAsync(erc721Proxy.address, {
+                from: owner,
+            }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+
+        // Deploy and configure ERC20 tokens
+        const numDummyErc20ToDeploy = 2;
+        [erc20TokenA, erc20TokenB] = await erc20Wrapper.deployDummyTokensAsync(
+            numDummyErc20ToDeploy,
+            constants.DUMMY_TOKEN_DECIMALS,
         );
         noReturnErc20Token = await DummyNoReturnERC20TokenContract.deployFrom0xArtifactAsync(
             artifacts.DummyNoReturnERC20Token,
@@ -104,30 +147,32 @@ describe('Asset Transfer Proxies', () => {
             constants.DUMMY_TOKEN_DECIMALS,
             constants.DUMMY_TOKEN_TOTAL_SUPPLY,
         );
+        multipleReturnErc20Token = await DummyMultipleReturnERC20TokenContract.deployFrom0xArtifactAsync(
+            artifacts.DummyMultipleReturnERC20Token,
+            provider,
+            txDefaults,
+            constants.DUMMY_TOKEN_NAME,
+            constants.DUMMY_TOKEN_SYMBOL,
+            constants.DUMMY_TOKEN_DECIMALS,
+            constants.DUMMY_TOKEN_TOTAL_SUPPLY,
+        );
+
+        await erc20Wrapper.setBalancesAndAllowancesAsync();
         await web3Wrapper.awaitTransactionSuccessAsync(
-            await noReturnErc20Token.setBalance.sendTransactionAsync(makerAddress, constants.INITIAL_ERC20_BALANCE),
+            await noReturnErc20Token.setBalance.sendTransactionAsync(fromAddress, constants.INITIAL_ERC20_BALANCE),
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
         await web3Wrapper.awaitTransactionSuccessAsync(
             await noReturnErc20Token.approve.sendTransactionAsync(
                 erc20Proxy.address,
                 constants.INITIAL_ERC20_ALLOWANCE,
-                { from: makerAddress },
+                { from: fromAddress },
             ),
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
-        multipleReturnErc20Token = await DummyMultipleReturnERC20TokenContract.deployFrom0xArtifactAsync(
-            artifacts.DummyMultipleReturnERC20Token,
-            provider,
-            txDefaults,
-            constants.DUMMY_TOKEN_NAME,
-            constants.DUMMY_TOKEN_SYMBOL,
-            constants.DUMMY_TOKEN_DECIMALS,
-            constants.DUMMY_TOKEN_TOTAL_SUPPLY,
-        );
         await web3Wrapper.awaitTransactionSuccessAsync(
             await multipleReturnErc20Token.setBalance.sendTransactionAsync(
-                makerAddress,
+                fromAddress,
                 constants.INITIAL_ERC20_BALANCE,
             ),
             constants.AWAIT_TRANSACTION_MINED_MS,
@@ -136,10 +181,23 @@ describe('Asset Transfer Proxies', () => {
             await multipleReturnErc20Token.approve.sendTransactionAsync(
                 erc20Proxy.address,
                 constants.INITIAL_ERC20_ALLOWANCE,
-                { from: makerAddress },
+                { from: fromAddress },
             ),
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
+
+        // Deploy and configure ERC721 tokens and receiver
+        [erc721TokenA, erc721TokenB] = await erc721Wrapper.deployDummyTokensAsync();
+        erc721Receiver = await DummyERC721ReceiverContract.deployFrom0xArtifactAsync(
+            artifacts.DummyERC721Receiver,
+            provider,
+            txDefaults,
+        );
+
+        await erc721Wrapper.setBalancesAndAllowancesAsync();
+        const erc721Balances = await erc721Wrapper.getBalancesAsync();
+        erc721AFromTokenId = erc721Balances[fromAddress][erc721TokenA.address][0];
+        erc721BFromTokenId = erc721Balances[fromAddress][erc721TokenB.address][0];
     });
     beforeEach(async () => {
         await blockchainLifecycle.startAsync();
@@ -147,7 +205,8 @@ describe('Asset Transfer Proxies', () => {
     afterEach(async () => {
         await blockchainLifecycle.revertAsync();
     });
-    describe('Transfer Proxy - ERC20', () => {
+
+    describe('ERC20Proxy', () => {
         it('should revert if undefined function is called', async () => {
             const undefinedSelector = '0x01020304';
             await expectTransactionFailedWithoutReasonAsync(
@@ -159,141 +218,146 @@ describe('Asset Transfer Proxies', () => {
                 }),
             );
         });
+        it('should have an id of 0xf47261b0', async () => {
+            const proxyId = await erc20Proxy.getProxyId.callAsync();
+            const expectedProxyId = '0xf47261b0';
+            expect(proxyId).to.equal(expectedProxyId);
+        });
         describe('transferFrom', () => {
             it('should successfully transfer tokens', async () => {
                 // Construct ERC20 asset data
-                const encodedAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
-                // Perform a transfer from makerAddress to takerAddress
+                const encodedAssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                // Perform a transfer from fromAddress to toAddress
                 const erc20Balances = await erc20Wrapper.getBalancesAsync();
                 const amount = new BigNumber(10);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
-                    takerAddress,
+                    fromAddress,
+                    toAddress,
                     amount,
                 );
                 await web3Wrapper.awaitTransactionSuccessAsync(
                     await web3Wrapper.sendTransactionAsync({
                         to: erc20Proxy.address,
                         data,
-                        from: exchangeAddress,
+                        from: authorized,
                     }),
                     constants.AWAIT_TRANSACTION_MINED_MS,
                 );
                 // Verify transfer was successful
                 const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][zrxToken.address].minus(amount),
+                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[fromAddress][erc20TokenA.address].minus(amount),
                 );
-                expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][zrxToken.address].add(amount),
+                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[toAddress][erc20TokenA.address].add(amount),
                 );
             });
 
             it('should successfully transfer tokens that do not return a value', async () => {
                 // Construct ERC20 asset data
                 const encodedAssetData = assetDataUtils.encodeERC20AssetData(noReturnErc20Token.address);
-                // Perform a transfer from makerAddress to takerAddress
-                const initialMakerBalance = await noReturnErc20Token.balanceOf.callAsync(makerAddress);
-                const initialTakerBalance = await noReturnErc20Token.balanceOf.callAsync(takerAddress);
+                // Perform a transfer from fromAddress to toAddress
+                const initialFromBalance = await noReturnErc20Token.balanceOf.callAsync(fromAddress);
+                const initialToBalance = await noReturnErc20Token.balanceOf.callAsync(toAddress);
                 const amount = new BigNumber(10);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
-                    takerAddress,
+                    fromAddress,
+                    toAddress,
                     amount,
                 );
                 await web3Wrapper.awaitTransactionSuccessAsync(
                     await web3Wrapper.sendTransactionAsync({
                         to: erc20Proxy.address,
                         data,
-                        from: exchangeAddress,
+                        from: authorized,
                     }),
                     constants.AWAIT_TRANSACTION_MINED_MS,
                 );
                 // Verify transfer was successful
-                const newMakerBalance = await noReturnErc20Token.balanceOf.callAsync(makerAddress);
-                const newTakerBalance = await noReturnErc20Token.balanceOf.callAsync(takerAddress);
-                expect(newMakerBalance).to.be.bignumber.equal(initialMakerBalance.minus(amount));
-                expect(newTakerBalance).to.be.bignumber.equal(initialTakerBalance.plus(amount));
+                const newFromBalance = await noReturnErc20Token.balanceOf.callAsync(fromAddress);
+                const newToBalance = await noReturnErc20Token.balanceOf.callAsync(toAddress);
+                expect(newFromBalance).to.be.bignumber.equal(initialFromBalance.minus(amount));
+                expect(newToBalance).to.be.bignumber.equal(initialToBalance.plus(amount));
             });
 
             it('should successfully transfer tokens and ignore extra assetData', async () => {
                 // Construct ERC20 asset data
                 const extraData = '0102030405060708';
-                const encodedAssetData = `${assetDataUtils.encodeERC20AssetData(zrxToken.address)}${extraData}`;
-                // Perform a transfer from makerAddress to takerAddress
+                const encodedAssetData = `${assetDataUtils.encodeERC20AssetData(erc20TokenA.address)}${extraData}`;
+                // Perform a transfer from fromAddress to toAddress
                 const erc20Balances = await erc20Wrapper.getBalancesAsync();
                 const amount = new BigNumber(10);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
-                    takerAddress,
+                    fromAddress,
+                    toAddress,
                     amount,
                 );
                 await web3Wrapper.awaitTransactionSuccessAsync(
                     await web3Wrapper.sendTransactionAsync({
                         to: erc20Proxy.address,
                         data,
-                        from: exchangeAddress,
+                        from: authorized,
                     }),
                     constants.AWAIT_TRANSACTION_MINED_MS,
                 );
                 // Verify transfer was successful
                 const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][zrxToken.address].minus(amount),
+                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[fromAddress][erc20TokenA.address].minus(amount),
                 );
-                expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][zrxToken.address].add(amount),
+                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[toAddress][erc20TokenA.address].add(amount),
                 );
             });
 
             it('should do nothing if transferring 0 amount of a token', async () => {
                 // Construct ERC20 asset data
-                const encodedAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
-                // Perform a transfer from makerAddress to takerAddress
+                const encodedAssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                // Perform a transfer from fromAddress to toAddress
                 const erc20Balances = await erc20Wrapper.getBalancesAsync();
                 const amount = new BigNumber(0);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
-                    takerAddress,
+                    fromAddress,
+                    toAddress,
                     amount,
                 );
                 await web3Wrapper.awaitTransactionSuccessAsync(
                     await web3Wrapper.sendTransactionAsync({
                         to: erc20Proxy.address,
                         data,
-                        from: exchangeAddress,
+                        from: authorized,
                     }),
                     constants.AWAIT_TRANSACTION_MINED_MS,
                 );
                 // Verify transfer was successful
                 const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][zrxToken.address],
+                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[fromAddress][erc20TokenA.address],
                 );
-                expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][zrxToken.address],
+                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[toAddress][erc20TokenA.address],
                 );
             });
 
-            it('should throw if allowances are too low', async () => {
+            it('should revert if allowances are too low', async () => {
                 // Construct ERC20 asset data
-                const encodedAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
+                const encodedAssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
                 // Create allowance less than transfer amount. Set allowance on proxy.
                 const allowance = new BigNumber(0);
                 const amount = new BigNumber(10);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
-                    takerAddress,
+                    fromAddress,
+                    toAddress,
                     amount,
                 );
                 await web3Wrapper.awaitTransactionSuccessAsync(
-                    await zrxToken.approve.sendTransactionAsync(erc20Proxy.address, allowance, {
-                        from: makerAddress,
+                    await erc20TokenA.approve.sendTransactionAsync(erc20Proxy.address, allowance, {
+                        from: fromAddress,
                     }),
                     constants.AWAIT_TRANSACTION_MINED_MS,
                 );
@@ -303,7 +367,7 @@ describe('Asset Transfer Proxies', () => {
                     web3Wrapper.sendTransactionAsync({
                         to: erc20Proxy.address,
                         data,
-                        from: exchangeAddress,
+                        from: authorized,
                     }),
                     RevertReason.TransferFailed,
                 );
@@ -311,7 +375,7 @@ describe('Asset Transfer Proxies', () => {
                 expect(newBalances).to.deep.equal(erc20Balances);
             });
 
-            it('should throw if allowances are too low and token does not return a value', async () => {
+            it('should revert if allowances are too low and token does not return a value', async () => {
                 // Construct ERC20 asset data
                 const encodedAssetData = assetDataUtils.encodeERC20AssetData(noReturnErc20Token.address);
                 // Create allowance less than transfer amount. Set allowance on proxy.
@@ -319,42 +383,42 @@ describe('Asset Transfer Proxies', () => {
                 const amount = new BigNumber(10);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
-                    takerAddress,
+                    fromAddress,
+                    toAddress,
                     amount,
                 );
                 await web3Wrapper.awaitTransactionSuccessAsync(
                     await noReturnErc20Token.approve.sendTransactionAsync(erc20Proxy.address, allowance, {
-                        from: makerAddress,
+                        from: fromAddress,
                     }),
                     constants.AWAIT_TRANSACTION_MINED_MS,
                 );
-                const initialMakerBalance = await noReturnErc20Token.balanceOf.callAsync(makerAddress);
-                const initialTakerBalance = await noReturnErc20Token.balanceOf.callAsync(takerAddress);
+                const initialFromBalance = await noReturnErc20Token.balanceOf.callAsync(fromAddress);
+                const initialToBalance = await noReturnErc20Token.balanceOf.callAsync(toAddress);
                 // Perform a transfer; expect this to fail.
                 await expectTransactionFailedAsync(
                     web3Wrapper.sendTransactionAsync({
                         to: erc20Proxy.address,
                         data,
-                        from: exchangeAddress,
+                        from: authorized,
                     }),
                     RevertReason.TransferFailed,
                 );
-                const newMakerBalance = await noReturnErc20Token.balanceOf.callAsync(makerAddress);
-                const newTakerBalance = await noReturnErc20Token.balanceOf.callAsync(takerAddress);
-                expect(newMakerBalance).to.be.bignumber.equal(initialMakerBalance);
-                expect(newTakerBalance).to.be.bignumber.equal(initialTakerBalance);
+                const newFromBalance = await noReturnErc20Token.balanceOf.callAsync(fromAddress);
+                const newToBalance = await noReturnErc20Token.balanceOf.callAsync(toAddress);
+                expect(newFromBalance).to.be.bignumber.equal(initialFromBalance);
+                expect(newToBalance).to.be.bignumber.equal(initialToBalance);
             });
 
-            it('should throw if requesting address is not authorized', async () => {
+            it('should revert if caller is not authorized', async () => {
                 // Construct ERC20 asset data
-                const encodedAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
-                // Perform a transfer from makerAddress to takerAddress
+                const encodedAssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                // Perform a transfer from fromAddress to toAddress
                 const amount = new BigNumber(10);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
-                    takerAddress,
+                    fromAddress,
+                    toAddress,
                     amount,
                 );
                 const erc20Balances = await erc20Wrapper.getBalancesAsync();
@@ -370,42 +434,36 @@ describe('Asset Transfer Proxies', () => {
                 expect(newBalances).to.deep.equal(erc20Balances);
             });
 
-            it('should throw if token returns more than 32 bytes', async () => {
+            it('should revert if token returns more than 32 bytes', async () => {
                 // Construct ERC20 asset data
                 const encodedAssetData = assetDataUtils.encodeERC20AssetData(multipleReturnErc20Token.address);
                 const amount = new BigNumber(10);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
-                    takerAddress,
+                    fromAddress,
+                    toAddress,
                     amount,
                 );
-                const initialMakerBalance = await multipleReturnErc20Token.balanceOf.callAsync(makerAddress);
-                const initialTakerBalance = await multipleReturnErc20Token.balanceOf.callAsync(takerAddress);
+                const initialFromBalance = await multipleReturnErc20Token.balanceOf.callAsync(fromAddress);
+                const initialToBalance = await multipleReturnErc20Token.balanceOf.callAsync(toAddress);
                 // Perform a transfer; expect this to fail.
                 await expectTransactionFailedAsync(
                     web3Wrapper.sendTransactionAsync({
                         to: erc20Proxy.address,
                         data,
-                        from: exchangeAddress,
+                        from: authorized,
                     }),
                     RevertReason.TransferFailed,
                 );
-                const newMakerBalance = await multipleReturnErc20Token.balanceOf.callAsync(makerAddress);
-                const newTakerBalance = await multipleReturnErc20Token.balanceOf.callAsync(takerAddress);
-                expect(newMakerBalance).to.be.bignumber.equal(initialMakerBalance);
-                expect(newTakerBalance).to.be.bignumber.equal(initialTakerBalance);
+                const newFromBalance = await multipleReturnErc20Token.balanceOf.callAsync(fromAddress);
+                const newToBalance = await multipleReturnErc20Token.balanceOf.callAsync(toAddress);
+                expect(newFromBalance).to.be.bignumber.equal(initialFromBalance);
+                expect(newToBalance).to.be.bignumber.equal(initialToBalance);
             });
         });
-
-        it('should have an id of 0xf47261b0', async () => {
-            const proxyId = await erc20Proxy.getProxyId.callAsync();
-            const expectedProxyId = '0xf47261b0';
-            expect(proxyId).to.equal(expectedProxyId);
-        });
     });
 
-    describe('Transfer Proxy - ERC721', () => {
+    describe('ERC721Proxy', () => {
         it('should revert if undefined function is called', async () => {
             const undefinedSelector = '0x01020304';
             await expectTransactionFailedWithoutReasonAsync(
@@ -417,76 +475,81 @@ describe('Asset Transfer Proxies', () => {
                 }),
             );
         });
+        it('should have an id of 0x02571792', async () => {
+            const proxyId = await erc721Proxy.getProxyId.callAsync();
+            const expectedProxyId = '0x02571792';
+            expect(proxyId).to.equal(expectedProxyId);
+        });
         describe('transferFrom', () => {
             it('should successfully transfer tokens', async () => {
                 // Construct ERC721 asset data
-                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721Token.address, erc721MakerTokenId);
+                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
                 // Verify pre-condition
-                const ownerMakerAsset = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
-                expect(ownerMakerAsset).to.be.equal(makerAddress);
-                // Perform a transfer from makerAddress to takerAddress
+                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(ownerFromAsset).to.be.equal(fromAddress);
+                // Perform a transfer from fromAddress to toAddress
                 const amount = new BigNumber(1);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
-                    takerAddress,
+                    fromAddress,
+                    toAddress,
                     amount,
                 );
                 await web3Wrapper.awaitTransactionSuccessAsync(
                     await web3Wrapper.sendTransactionAsync({
                         to: erc721Proxy.address,
                         data,
-                        from: exchangeAddress,
+                        from: authorized,
                     }),
                     constants.AWAIT_TRANSACTION_MINED_MS,
                 );
                 // Verify transfer was successful
-                const newOwnerMakerAsset = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
-                expect(newOwnerMakerAsset).to.be.bignumber.equal(takerAddress);
+                const newOwnerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(newOwnerFromAsset).to.be.bignumber.equal(toAddress);
             });
 
             it('should successfully transfer tokens and ignore extra assetData', async () => {
                 // Construct ERC721 asset data
                 const extraData = '0102030405060708';
                 const encodedAssetData = `${assetDataUtils.encodeERC721AssetData(
-                    erc721Token.address,
-                    erc721MakerTokenId,
+                    erc721TokenA.address,
+                    erc721AFromTokenId,
                 )}${extraData}`;
                 // Verify pre-condition
-                const ownerMakerAsset = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
-                expect(ownerMakerAsset).to.be.equal(makerAddress);
-                // Perform a transfer from makerAddress to takerAddress
+                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(ownerFromAsset).to.be.equal(fromAddress);
+                // Perform a transfer from fromAddress to toAddress
                 const amount = new BigNumber(1);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
-                    takerAddress,
+                    fromAddress,
+                    toAddress,
                     amount,
                 );
                 await web3Wrapper.awaitTransactionSuccessAsync(
                     await web3Wrapper.sendTransactionAsync({
                         to: erc721Proxy.address,
                         data,
-                        from: exchangeAddress,
+                        from: authorized,
                     }),
                     constants.AWAIT_TRANSACTION_MINED_MS,
                 );
                 // Verify transfer was successful
-                const newOwnerMakerAsset = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
-                expect(newOwnerMakerAsset).to.be.bignumber.equal(takerAddress);
+                const newOwnerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(newOwnerFromAsset).to.be.bignumber.equal(toAddress);
             });
 
             it('should not call onERC721Received when transferring to a smart contract', async () => {
                 // Construct ERC721 asset data
-                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721Token.address, erc721MakerTokenId);
+                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
                 // Verify pre-condition
-                const ownerMakerAsset = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
-                expect(ownerMakerAsset).to.be.equal(makerAddress);
-                // Perform a transfer from makerAddress to takerAddress
+                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(ownerFromAsset).to.be.equal(fromAddress);
+                // Perform a transfer from fromAddress to toAddress
                 const amount = new BigNumber(1);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
+                    fromAddress,
                     erc721Receiver.address,
                     amount,
                 );
@@ -495,79 +558,79 @@ describe('Asset Transfer Proxies', () => {
                     await web3Wrapper.sendTransactionAsync({
                         to: erc721Proxy.address,
                         data,
-                        from: exchangeAddress,
+                        from: authorized,
                         gas: constants.MAX_TRANSFER_FROM_GAS,
                     }),
                 );
                 // Verify that no log was emitted by erc721 receiver
                 expect(tx.logs.length).to.be.equal(1);
                 // Verify transfer was successful
-                const newOwnerMakerAsset = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
-                expect(newOwnerMakerAsset).to.be.bignumber.equal(erc721Receiver.address);
+                const newOwnerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(newOwnerFromAsset).to.be.bignumber.equal(erc721Receiver.address);
             });
 
-            it('should throw if transferring 0 amount of a token', async () => {
+            it('should revert if transferring 0 amount of a token', async () => {
                 // Construct ERC721 asset data
-                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721Token.address, erc721MakerTokenId);
+                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
                 // Verify pre-condition
-                const ownerMakerAsset = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
-                expect(ownerMakerAsset).to.be.equal(makerAddress);
-                // Perform a transfer from makerAddress to takerAddress
+                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(ownerFromAsset).to.be.equal(fromAddress);
+                // Perform a transfer from fromAddress to toAddress
                 const amount = new BigNumber(0);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
-                    takerAddress,
+                    fromAddress,
+                    toAddress,
                     amount,
                 );
                 await expectTransactionFailedAsync(
                     web3Wrapper.sendTransactionAsync({
                         to: erc721Proxy.address,
                         data,
-                        from: exchangeAddress,
+                        from: authorized,
                     }),
                     RevertReason.InvalidAmount,
                 );
-                const newOwner = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
-                expect(newOwner).to.be.equal(ownerMakerAsset);
+                const newOwner = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(newOwner).to.be.equal(ownerFromAsset);
             });
 
-            it('should throw if transferring > 1 amount of a token', async () => {
+            it('should revert if transferring > 1 amount of a token', async () => {
                 // Construct ERC721 asset data
-                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721Token.address, erc721MakerTokenId);
+                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
                 // Verify pre-condition
-                const ownerMakerAsset = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
-                expect(ownerMakerAsset).to.be.equal(makerAddress);
-                // Perform a transfer from makerAddress to takerAddress
+                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(ownerFromAsset).to.be.equal(fromAddress);
+                // Perform a transfer from fromAddress to toAddress
                 const amount = new BigNumber(500);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
-                    takerAddress,
+                    fromAddress,
+                    toAddress,
                     amount,
                 );
                 await expectTransactionFailedAsync(
                     web3Wrapper.sendTransactionAsync({
                         to: erc721Proxy.address,
                         data,
-                        from: exchangeAddress,
+                        from: authorized,
                     }),
                     RevertReason.InvalidAmount,
                 );
-                const newOwner = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
-                expect(newOwner).to.be.equal(ownerMakerAsset);
+                const newOwner = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(newOwner).to.be.equal(ownerFromAsset);
             });
 
-            it('should throw if allowances are too low', async () => {
+            it('should revert if allowances are too low', async () => {
                 // Construct ERC721 asset data
-                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721Token.address, erc721MakerTokenId);
+                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
                 // Verify pre-condition
-                const ownerMakerAsset = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
-                expect(ownerMakerAsset).to.be.equal(makerAddress);
-                // Remove transfer approval for makerAddress.
+                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(ownerFromAsset).to.be.equal(fromAddress);
+                // Remove transfer approval for fromAddress.
                 await web3Wrapper.awaitTransactionSuccessAsync(
-                    await erc721Token.approve.sendTransactionAsync(constants.NULL_ADDRESS, erc721MakerTokenId, {
-                        from: makerAddress,
+                    await erc721TokenA.approve.sendTransactionAsync(constants.NULL_ADDRESS, erc721AFromTokenId, {
+                        from: fromAddress,
                     }),
                     constants.AWAIT_TRANSACTION_MINED_MS,
                 );
@@ -575,34 +638,34 @@ describe('Asset Transfer Proxies', () => {
                 const amount = new BigNumber(1);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
-                    takerAddress,
+                    fromAddress,
+                    toAddress,
                     amount,
                 );
                 await expectTransactionFailedAsync(
                     web3Wrapper.sendTransactionAsync({
                         to: erc721Proxy.address,
                         data,
-                        from: exchangeAddress,
+                        from: authorized,
                     }),
                     RevertReason.TransferFailed,
                 );
-                const newOwner = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
-                expect(newOwner).to.be.equal(ownerMakerAsset);
+                const newOwner = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(newOwner).to.be.equal(ownerFromAsset);
             });
 
-            it('should throw if requesting address is not authorized', async () => {
+            it('should revert if caller is not authorized', async () => {
                 // Construct ERC721 asset data
-                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721Token.address, erc721MakerTokenId);
+                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
                 // Verify pre-condition
-                const ownerMakerAsset = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
-                expect(ownerMakerAsset).to.be.equal(makerAddress);
-                // Perform a transfer from makerAddress to takerAddress
+                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(ownerFromAsset).to.be.equal(fromAddress);
+                // Perform a transfer from fromAddress to toAddress
                 const amount = new BigNumber(1);
                 const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
                     encodedAssetData,
-                    makerAddress,
-                    takerAddress,
+                    fromAddress,
+                    toAddress,
                     amount,
                 );
                 await expectTransactionFailedAsync(
@@ -613,16 +676,570 @@ describe('Asset Transfer Proxies', () => {
                     }),
                     RevertReason.SenderNotAuthorized,
                 );
-                const newOwner = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
-                expect(newOwner).to.be.equal(ownerMakerAsset);
+                const newOwner = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(newOwner).to.be.equal(ownerFromAsset);
             });
         });
-
-        it('should have an id of 0x02571792', async () => {
-            const proxyId = await erc721Proxy.getProxyId.callAsync();
-            const expectedProxyId = '0x02571792';
+    });
+    describe('MultiAssetProxy', () => {
+        it('should revert if undefined function is called', async () => {
+            const undefinedSelector = '0x01020304';
+            await expectTransactionFailedWithoutReasonAsync(
+                web3Wrapper.sendTransactionAsync({
+                    from: owner,
+                    to: multiAssetProxy.address,
+                    value: constants.ZERO_AMOUNT,
+                    data: undefinedSelector,
+                }),
+            );
+        });
+        it('should have an id of 0x94cfcdd7', async () => {
+            const proxyId = await multiAssetProxy.getProxyId.callAsync();
+            // first 4 bytes of `keccak256('MultiAsset(uint256[],bytes[])')`
+            const expectedProxyId = '0x94cfcdd7';
             expect(proxyId).to.equal(expectedProxyId);
         });
+        describe('transferFrom', () => {
+            it('should transfer a single ERC20 token', async () => {
+                const inputAmount = new BigNumber(1);
+                const erc20Amount = new BigNumber(10);
+                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                const amounts = [erc20Amount];
+                const nestedAssetData = [erc20AssetData];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                const erc20Balances = await erc20Wrapper.getBalancesAsync();
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const newBalances = await erc20Wrapper.getBalancesAsync();
+                const totalAmount = inputAmount.times(erc20Amount);
+                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalAmount),
+                );
+                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[toAddress][erc20TokenA.address].add(totalAmount),
+                );
+            });
+            it('should successfully transfer multiple of the same ERC20 token', async () => {
+                const inputAmount = new BigNumber(1);
+                const erc20Amount1 = new BigNumber(10);
+                const erc20Amount2 = new BigNumber(20);
+                const erc20AssetData1 = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                const erc20AssetData2 = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                const amounts = [erc20Amount1, erc20Amount2];
+                const nestedAssetData = [erc20AssetData1, erc20AssetData2];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                const erc20Balances = await erc20Wrapper.getBalancesAsync();
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const newBalances = await erc20Wrapper.getBalancesAsync();
+                const totalAmount = inputAmount.times(erc20Amount1).plus(inputAmount.times(erc20Amount2));
+                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalAmount),
+                );
+                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[toAddress][erc20TokenA.address].add(totalAmount),
+                );
+            });
+            it('should successfully transfer multiple different ERC20 tokens', async () => {
+                const inputAmount = new BigNumber(1);
+                const erc20Amount1 = new BigNumber(10);
+                const erc20Amount2 = new BigNumber(20);
+                const erc20AssetData1 = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                const erc20AssetData2 = assetDataUtils.encodeERC20AssetData(erc20TokenB.address);
+                const amounts = [erc20Amount1, erc20Amount2];
+                const nestedAssetData = [erc20AssetData1, erc20AssetData2];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                const erc20Balances = await erc20Wrapper.getBalancesAsync();
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const newBalances = await erc20Wrapper.getBalancesAsync();
+                const totalErc20AAmount = inputAmount.times(erc20Amount1);
+                const totalErc20BAmount = inputAmount.times(erc20Amount2);
+                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalErc20AAmount),
+                );
+                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[toAddress][erc20TokenA.address].add(totalErc20AAmount),
+                );
+                expect(newBalances[fromAddress][erc20TokenB.address]).to.be.bignumber.equal(
+                    erc20Balances[fromAddress][erc20TokenB.address].minus(totalErc20BAmount),
+                );
+                expect(newBalances[toAddress][erc20TokenB.address]).to.be.bignumber.equal(
+                    erc20Balances[toAddress][erc20TokenB.address].add(totalErc20BAmount),
+                );
+            });
+            it('should transfer a single ERC721 token', async () => {
+                const inputAmount = new BigNumber(1);
+                const erc721Amount = new BigNumber(1);
+                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
+                const amounts = [erc721Amount];
+                const nestedAssetData = [erc721AssetData];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(ownerFromAsset).to.be.equal(fromAddress);
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const newOwnerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(newOwnerFromAsset).to.be.equal(toAddress);
+            });
+            it('should successfully transfer multiple of the same ERC721 token', async () => {
+                const erc721Balances = await erc721Wrapper.getBalancesAsync();
+                const erc721AFromTokenId2 = erc721Balances[fromAddress][erc721TokenA.address][1];
+                const erc721AssetData1 = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
+                const erc721AssetData2 = assetDataUtils.encodeERC721AssetData(
+                    erc721TokenA.address,
+                    erc721AFromTokenId2,
+                );
+                const inputAmount = new BigNumber(1);
+                const erc721Amount = new BigNumber(1);
+                const amounts = [erc721Amount, erc721Amount];
+                const nestedAssetData = [erc721AssetData1, erc721AssetData2];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                const ownerFromAsset1 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(ownerFromAsset1).to.be.equal(fromAddress);
+                const ownerFromAsset2 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId2);
+                expect(ownerFromAsset2).to.be.equal(fromAddress);
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                        gas: constants.MAX_TRANSFER_FROM_GAS,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const newOwnerFromAsset1 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                const newOwnerFromAsset2 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId2);
+                expect(newOwnerFromAsset1).to.be.equal(toAddress);
+                expect(newOwnerFromAsset2).to.be.equal(toAddress);
+            });
+            it('should successfully transfer multiple different ERC721 tokens', async () => {
+                const erc721AssetData1 = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
+                const erc721AssetData2 = assetDataUtils.encodeERC721AssetData(erc721TokenB.address, erc721BFromTokenId);
+                const inputAmount = new BigNumber(1);
+                const erc721Amount = new BigNumber(1);
+                const amounts = [erc721Amount, erc721Amount];
+                const nestedAssetData = [erc721AssetData1, erc721AssetData2];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                const ownerFromAsset1 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(ownerFromAsset1).to.be.equal(fromAddress);
+                const ownerFromAsset2 = await erc721TokenB.ownerOf.callAsync(erc721BFromTokenId);
+                expect(ownerFromAsset2).to.be.equal(fromAddress);
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                        gas: constants.MAX_TRANSFER_FROM_GAS,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const newOwnerFromAsset1 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                const newOwnerFromAsset2 = await erc721TokenB.ownerOf.callAsync(erc721BFromTokenId);
+                expect(newOwnerFromAsset1).to.be.equal(toAddress);
+                expect(newOwnerFromAsset2).to.be.equal(toAddress);
+            });
+            it('should successfully transfer a combination of ERC20 and ERC721 tokens', async () => {
+                const inputAmount = new BigNumber(1);
+                const erc20Amount = new BigNumber(10);
+                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                const erc721Amount = new BigNumber(1);
+                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
+                const amounts = [erc20Amount, erc721Amount];
+                const nestedAssetData = [erc20AssetData, erc721AssetData];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                const erc20Balances = await erc20Wrapper.getBalancesAsync();
+                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(ownerFromAsset).to.be.equal(fromAddress);
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const newBalances = await erc20Wrapper.getBalancesAsync();
+                const totalAmount = inputAmount.times(erc20Amount);
+                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalAmount),
+                );
+                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[toAddress][erc20TokenA.address].add(totalAmount),
+                );
+                const newOwnerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(newOwnerFromAsset).to.be.equal(toAddress);
+            });
+            it('should successfully transfer tokens and ignore extra assetData', async () => {
+                const inputAmount = new BigNumber(1);
+                const erc20Amount = new BigNumber(10);
+                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                const erc721Amount = new BigNumber(1);
+                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
+                const amounts = [erc20Amount, erc721Amount];
+                const nestedAssetData = [erc20AssetData, erc721AssetData];
+                const extraData = '0102030405060708';
+                const assetData = `${assetDataInterface.MultiAsset.getABIEncodedTransactionData(
+                    amounts,
+                    nestedAssetData,
+                )}${extraData}`;
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                const erc20Balances = await erc20Wrapper.getBalancesAsync();
+                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(ownerFromAsset).to.be.equal(fromAddress);
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const newBalances = await erc20Wrapper.getBalancesAsync();
+                const totalAmount = inputAmount.times(erc20Amount);
+                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalAmount),
+                );
+                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[toAddress][erc20TokenA.address].add(totalAmount),
+                );
+                const newOwnerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(newOwnerFromAsset).to.be.equal(toAddress);
+            });
+            it('should successfully transfer correct amounts when the `amount` > 1', async () => {
+                const inputAmount = new BigNumber(100);
+                const erc20Amount1 = new BigNumber(10);
+                const erc20Amount2 = new BigNumber(20);
+                const erc20AssetData1 = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                const erc20AssetData2 = assetDataUtils.encodeERC20AssetData(erc20TokenB.address);
+                const amounts = [erc20Amount1, erc20Amount2];
+                const nestedAssetData = [erc20AssetData1, erc20AssetData2];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                const erc20Balances = await erc20Wrapper.getBalancesAsync();
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const newBalances = await erc20Wrapper.getBalancesAsync();
+                const totalErc20AAmount = inputAmount.times(erc20Amount1);
+                const totalErc20BAmount = inputAmount.times(erc20Amount2);
+                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalErc20AAmount),
+                );
+                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[toAddress][erc20TokenA.address].add(totalErc20AAmount),
+                );
+                expect(newBalances[fromAddress][erc20TokenB.address]).to.be.bignumber.equal(
+                    erc20Balances[fromAddress][erc20TokenB.address].minus(totalErc20BAmount),
+                );
+                expect(newBalances[toAddress][erc20TokenB.address]).to.be.bignumber.equal(
+                    erc20Balances[toAddress][erc20TokenB.address].add(totalErc20BAmount),
+                );
+            });
+            it('should successfully transfer a large amount of tokens', async () => {
+                const inputAmount = new BigNumber(1);
+                const erc20Amount1 = new BigNumber(10);
+                const erc20Amount2 = new BigNumber(20);
+                const erc20AssetData1 = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                const erc20AssetData2 = assetDataUtils.encodeERC20AssetData(erc20TokenB.address);
+                const erc721Amount = new BigNumber(1);
+                const erc721Balances = await erc721Wrapper.getBalancesAsync();
+                const erc721AFromTokenId2 = erc721Balances[fromAddress][erc721TokenA.address][1];
+                const erc721BFromTokenId2 = erc721Balances[fromAddress][erc721TokenB.address][1];
+                const erc721AssetData1 = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
+                const erc721AssetData2 = assetDataUtils.encodeERC721AssetData(
+                    erc721TokenA.address,
+                    erc721AFromTokenId2,
+                );
+                const erc721AssetData3 = assetDataUtils.encodeERC721AssetData(erc721TokenB.address, erc721BFromTokenId);
+                const erc721AssetData4 = assetDataUtils.encodeERC721AssetData(
+                    erc721TokenB.address,
+                    erc721BFromTokenId2,
+                );
+                const amounts = [erc721Amount, erc20Amount1, erc721Amount, erc20Amount2, erc721Amount, erc721Amount];
+                const nestedAssetData = [
+                    erc721AssetData1,
+                    erc20AssetData1,
+                    erc721AssetData2,
+                    erc20AssetData2,
+                    erc721AssetData3,
+                    erc721AssetData4,
+                ];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                const ownerFromAsset1 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(ownerFromAsset1).to.be.equal(fromAddress);
+                const ownerFromAsset2 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId2);
+                expect(ownerFromAsset2).to.be.equal(fromAddress);
+                const ownerFromAsset3 = await erc721TokenB.ownerOf.callAsync(erc721BFromTokenId);
+                expect(ownerFromAsset3).to.be.equal(fromAddress);
+                const ownerFromAsset4 = await erc721TokenB.ownerOf.callAsync(erc721BFromTokenId2);
+                expect(ownerFromAsset4).to.be.equal(fromAddress);
+                const erc20Balances = await erc20Wrapper.getBalancesAsync();
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                        gas: constants.MAX_EXECUTE_TRANSACTION_GAS,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const newOwnerFromAsset1 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                const newOwnerFromAsset2 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId2);
+                const newOwnerFromAsset3 = await erc721TokenB.ownerOf.callAsync(erc721BFromTokenId);
+                const newOwnerFromAsset4 = await erc721TokenB.ownerOf.callAsync(erc721BFromTokenId2);
+                expect(newOwnerFromAsset1).to.be.equal(toAddress);
+                expect(newOwnerFromAsset2).to.be.equal(toAddress);
+                expect(newOwnerFromAsset3).to.be.equal(toAddress);
+                expect(newOwnerFromAsset4).to.be.equal(toAddress);
+                const newBalances = await erc20Wrapper.getBalancesAsync();
+                const totalErc20AAmount = inputAmount.times(erc20Amount1);
+                const totalErc20BAmount = inputAmount.times(erc20Amount2);
+                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalErc20AAmount),
+                );
+                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[toAddress][erc20TokenA.address].add(totalErc20AAmount),
+                );
+                expect(newBalances[fromAddress][erc20TokenB.address]).to.be.bignumber.equal(
+                    erc20Balances[fromAddress][erc20TokenB.address].minus(totalErc20BAmount),
+                );
+                expect(newBalances[toAddress][erc20TokenB.address]).to.be.bignumber.equal(
+                    erc20Balances[toAddress][erc20TokenB.address].add(totalErc20BAmount),
+                );
+            });
+            it('should revert if a single transfer fails', async () => {
+                const inputAmount = new BigNumber(1);
+                const erc20Amount = new BigNumber(10);
+                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                // 2 is an invalid erc721 amount
+                const erc721Amount = new BigNumber(2);
+                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
+                const amounts = [erc20Amount, erc721Amount];
+                const nestedAssetData = [erc20AssetData, erc721AssetData];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                await expectTransactionFailedAsync(
+                    web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    RevertReason.InvalidAmount,
+                );
+            });
+            it('should revert if an AssetProxy is not registered', async () => {
+                const inputAmount = new BigNumber(1);
+                const erc20Amount = new BigNumber(10);
+                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                const erc721Amount = new BigNumber(1);
+                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
+                const invalidProxyId = '0x12345678';
+                const invalidErc721AssetData = `${invalidProxyId}${erc721AssetData.slice(10)}`;
+                const amounts = [erc20Amount, erc721Amount];
+                const nestedAssetData = [erc20AssetData, invalidErc721AssetData];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                await expectTransactionFailedAsync(
+                    web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    RevertReason.AssetProxyDoesNotExist,
+                );
+            });
+            it('should revert if the length of `amounts` does not match the length of `nestedAssetData`', async () => {
+                const inputAmount = new BigNumber(1);
+                const erc20Amount = new BigNumber(10);
+                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
+                const amounts = [erc20Amount];
+                const nestedAssetData = [erc20AssetData, erc721AssetData];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                await expectTransactionFailedAsync(
+                    web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    RevertReason.LengthMismatch,
+                );
+            });
+            it('should revert if amounts multiplication results in an overflow', async () => {
+                const inputAmount = new BigNumber(2).pow(128);
+                const erc20Amount = new BigNumber(2).pow(128);
+                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                const amounts = [erc20Amount];
+                const nestedAssetData = [erc20AssetData];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                await expectTransactionFailedAsync(
+                    web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    RevertReason.Uint256Overflow,
+                );
+            });
+            it('should revert if an element of `nestedAssetData` is < 4 bytes long', async () => {
+                const inputAmount = new BigNumber(1);
+                const erc20Amount = new BigNumber(10);
+                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                const erc721Amount = new BigNumber(1);
+                const erc721AssetData = '0x123456';
+                const amounts = [erc20Amount, erc721Amount];
+                const nestedAssetData = [erc20AssetData, erc721AssetData];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                await expectTransactionFailedAsync(
+                    web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    RevertReason.LengthGreaterThan3Required,
+                );
+            });
+            it('should revert if caller is not authorized', async () => {
+                const inputAmount = new BigNumber(1);
+                const erc20Amount = new BigNumber(10);
+                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                const erc721Amount = new BigNumber(1);
+                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
+                const amounts = [erc20Amount, erc721Amount];
+                const nestedAssetData = [erc20AssetData, erc721AssetData];
+                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                await expectTransactionFailedAsync(
+                    web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: notAuthorized,
+                    }),
+                    RevertReason.SenderNotAuthorized,
+                );
+            });
+        });
     });
 });
 // tslint:enable:no-unnecessary-type-assertion
diff --git a/packages/contracts/test/exchange/core.ts b/packages/contracts/test/exchange/core.ts
index fc8dc5346..9159b0d8f 100644
--- a/packages/contracts/test/exchange/core.ts
+++ b/packages/contracts/test/exchange/core.ts
@@ -14,6 +14,8 @@ import { DummyNoReturnERC20TokenContract } from '../../generated-wrappers/dummy_
 import { ERC20ProxyContract } from '../../generated-wrappers/erc20_proxy';
 import { ERC721ProxyContract } from '../../generated-wrappers/erc721_proxy';
 import { ExchangeCancelEventArgs, ExchangeContract } from '../../generated-wrappers/exchange';
+import { IAssetDataContract } from '../../generated-wrappers/i_asset_data';
+import { MultiAssetProxyContract } from '../../generated-wrappers/multi_asset_proxy';
 import { ReentrantERC20TokenContract } from '../../generated-wrappers/reentrant_erc20_token';
 import { TestStaticCallReceiverContract } from '../../generated-wrappers/test_static_call_receiver';
 import { artifacts } from '../../src/artifacts';
@@ -31,6 +33,11 @@ import { provider, txDefaults, web3Wrapper } from '../utils/web3_wrapper';
 chaiSetup.configure();
 const expect = chai.expect;
 const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+const assetDataInterface = new IAssetDataContract(
+    artifacts.IAssetData.compilerOutput.abi,
+    constants.NULL_ADDRESS,
+    provider,
+);
 // tslint:disable:no-unnecessary-type-assertion
 describe('Exchange core', () => {
     let makerAddress: string;
@@ -47,6 +54,7 @@ describe('Exchange core', () => {
     let exchange: ExchangeContract;
     let erc20Proxy: ERC20ProxyContract;
     let erc721Proxy: ERC721ProxyContract;
+    let multiAssetProxy: MultiAssetProxyContract;
     let maliciousWallet: TestStaticCallReceiverContract;
     let maliciousValidator: TestStaticCallReceiverContract;
 
@@ -76,31 +84,39 @@ describe('Exchange core', () => {
         erc20Wrapper = new ERC20Wrapper(provider, usedAddresses, owner);
         erc721Wrapper = new ERC721Wrapper(provider, usedAddresses, owner);
 
+        // Deploy AssetProxies, Exchange, tokens, and malicious contracts
+        erc20Proxy = await erc20Wrapper.deployProxyAsync();
+        erc721Proxy = await erc721Wrapper.deployProxyAsync();
+        multiAssetProxy = await MultiAssetProxyContract.deployFrom0xArtifactAsync(
+            artifacts.MultiAssetProxy,
+            provider,
+            txDefaults,
+        );
         const numDummyErc20ToDeploy = 3;
         [erc20TokenA, erc20TokenB, zrxToken] = await erc20Wrapper.deployDummyTokensAsync(
             numDummyErc20ToDeploy,
             constants.DUMMY_TOKEN_DECIMALS,
         );
-        erc20Proxy = await erc20Wrapper.deployProxyAsync();
-        await erc20Wrapper.setBalancesAndAllowancesAsync();
-
         [erc721Token] = await erc721Wrapper.deployDummyTokensAsync();
-        erc721Proxy = await erc721Wrapper.deployProxyAsync();
-        await erc721Wrapper.setBalancesAndAllowancesAsync();
-        const erc721Balances = await erc721Wrapper.getBalancesAsync();
-        erc721MakerAssetIds = erc721Balances[makerAddress][erc721Token.address];
-        erc721TakerAssetIds = erc721Balances[takerAddress][erc721Token.address];
-
         exchange = await ExchangeContract.deployFrom0xArtifactAsync(
             artifacts.Exchange,
             provider,
             txDefaults,
             assetDataUtils.encodeERC20AssetData(zrxToken.address),
         );
-        exchangeWrapper = new ExchangeWrapper(exchange, provider);
-        await exchangeWrapper.registerAssetProxyAsync(erc20Proxy.address, owner);
-        await exchangeWrapper.registerAssetProxyAsync(erc721Proxy.address, owner);
+        maliciousWallet = maliciousValidator = await TestStaticCallReceiverContract.deployFrom0xArtifactAsync(
+            artifacts.TestStaticCallReceiver,
+            provider,
+            txDefaults,
+        );
+        reentrantErc20Token = await ReentrantERC20TokenContract.deployFrom0xArtifactAsync(
+            artifacts.ReentrantERC20Token,
+            provider,
+            txDefaults,
+            exchange.address,
+        );
 
+        // Configure ERC20Proxy
         await web3Wrapper.awaitTransactionSuccessAsync(
             await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, {
                 from: owner,
@@ -108,27 +124,64 @@ describe('Exchange core', () => {
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
         await web3Wrapper.awaitTransactionSuccessAsync(
+            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(multiAssetProxy.address, {
+                from: owner,
+            }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+
+        // Configure ERC721Proxy
+        await web3Wrapper.awaitTransactionSuccessAsync(
             await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, {
                 from: owner,
             }),
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(multiAssetProxy.address, {
+                from: owner,
+            }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
 
-        maliciousWallet = maliciousValidator = await TestStaticCallReceiverContract.deployFrom0xArtifactAsync(
-            artifacts.TestStaticCallReceiver,
-            provider,
-            txDefaults,
+        // Configure MultiAssetProxy
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await multiAssetProxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, {
+                from: owner,
+            }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
         );
-        reentrantErc20Token = await ReentrantERC20TokenContract.deployFrom0xArtifactAsync(
-            artifacts.ReentrantERC20Token,
-            provider,
-            txDefaults,
-            exchange.address,
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await multiAssetProxy.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, {
+                from: owner,
+            }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await multiAssetProxy.registerAssetProxy.sendTransactionAsync(erc721Proxy.address, {
+                from: owner,
+            }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
         );
 
+        // Configure Exchange
+        exchangeWrapper = new ExchangeWrapper(exchange, provider);
+        await exchangeWrapper.registerAssetProxyAsync(erc20Proxy.address, owner);
+        await exchangeWrapper.registerAssetProxyAsync(erc721Proxy.address, owner);
+        await exchangeWrapper.registerAssetProxyAsync(multiAssetProxy.address, owner);
+
+        // Configure ERC20 tokens
+        await erc20Wrapper.setBalancesAndAllowancesAsync();
+
+        // Configure ERC721 tokens
+        await erc721Wrapper.setBalancesAndAllowancesAsync();
+        const erc721Balances = await erc721Wrapper.getBalancesAsync();
+        erc721MakerAssetIds = erc721Balances[makerAddress][erc721Token.address];
+        erc721TakerAssetIds = erc721Balances[takerAddress][erc721Token.address];
+
+        // Configure order defaults
         defaultMakerAssetAddress = erc20TokenA.address;
         defaultTakerAssetAddress = erc20TokenB.address;
-
         const defaultOrderParams = {
             ...constants.STATIC_ORDER_PARAMS,
             exchangeAddress: exchange.address,
@@ -707,6 +760,292 @@ describe('Exchange core', () => {
         });
     });
 
+    describe('Testing exchange of multiple assets', () => {
+        it('should allow multiple assets to be exchanged for a single asset', async () => {
+            const makerAmounts = [new BigNumber(10), new BigNumber(20)];
+            const makerNestedAssetData = [
+                assetDataUtils.encodeERC20AssetData(erc20TokenA.address),
+                assetDataUtils.encodeERC20AssetData(erc20TokenB.address),
+            ];
+            const makerAssetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(
+                makerAmounts,
+                makerNestedAssetData,
+            );
+            const makerAssetAmount = new BigNumber(1);
+            const takerAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
+            const takerAssetAmount = new BigNumber(10);
+            signedOrder = await orderFactory.newSignedOrderAsync({
+                makerAssetData,
+                takerAssetData,
+                makerAssetAmount,
+                takerAssetAmount,
+                makerFee: constants.ZERO_AMOUNT,
+                takerFee: constants.ZERO_AMOUNT,
+            });
+
+            const initialMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
+            const initialMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
+            const initialMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
+            const initialTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
+            const initialTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
+            const initialTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
+
+            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress);
+
+            const finalMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
+            const finalMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
+            const finalMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
+            const finalTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
+            const finalTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
+            const finalTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
+
+            expect(finalMakerBalanceA).to.be.bignumber.equal(
+                initialMakerBalanceA.minus(makerAmounts[0].times(makerAssetAmount)),
+            );
+            expect(finalMakerBalanceB).to.be.bignumber.equal(
+                initialMakerBalanceB.minus(makerAmounts[1].times(makerAssetAmount)),
+            );
+            expect(finalMakerZrxBalance).to.be.bignumber.equal(initialMakerZrxBalance.plus(takerAssetAmount));
+            expect(finalTakerBalanceA).to.be.bignumber.equal(
+                initialTakerBalanceA.plus(makerAmounts[0].times(makerAssetAmount)),
+            );
+            expect(finalTakerBalanceB).to.be.bignumber.equal(
+                initialTakerBalanceB.plus(makerAmounts[1].times(makerAssetAmount)),
+            );
+            expect(finalTakerZrxBalance).to.be.bignumber.equal(initialTakerZrxBalance.minus(takerAssetAmount));
+        });
+        it('should allow multiple assets to be exchanged for multiple assets', async () => {
+            const makerAmounts = [new BigNumber(10), new BigNumber(20)];
+            const makerNestedAssetData = [
+                assetDataUtils.encodeERC20AssetData(erc20TokenA.address),
+                assetDataUtils.encodeERC20AssetData(erc20TokenB.address),
+            ];
+            const makerAssetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(
+                makerAmounts,
+                makerNestedAssetData,
+            );
+            const makerAssetAmount = new BigNumber(1);
+            const takerAmounts = [new BigNumber(10), new BigNumber(1)];
+            const takerAssetId = erc721TakerAssetIds[0];
+            const takerNestedAssetData = [
+                assetDataUtils.encodeERC20AssetData(zrxToken.address),
+                assetDataUtils.encodeERC721AssetData(erc721Token.address, takerAssetId),
+            ];
+            const takerAssetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(
+                takerAmounts,
+                takerNestedAssetData,
+            );
+            const takerAssetAmount = new BigNumber(1);
+            signedOrder = await orderFactory.newSignedOrderAsync({
+                makerAssetData,
+                takerAssetData,
+                makerAssetAmount,
+                takerAssetAmount,
+                makerFee: constants.ZERO_AMOUNT,
+                takerFee: constants.ZERO_AMOUNT,
+            });
+
+            const initialMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
+            const initialMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
+            const initialMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
+            const initialTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
+            const initialTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
+            const initialTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
+            const initialOwnerTakerAsset = await erc721Token.ownerOf.callAsync(takerAssetId);
+            expect(initialOwnerTakerAsset).to.be.bignumber.equal(takerAddress);
+
+            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress);
+
+            const finalMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
+            const finalMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
+            const finalMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
+            const finalTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
+            const finalTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
+            const finalTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
+            const finalOwnerTakerAsset = await erc721Token.ownerOf.callAsync(takerAssetId);
+
+            expect(finalMakerBalanceA).to.be.bignumber.equal(
+                initialMakerBalanceA.minus(makerAmounts[0].times(makerAssetAmount)),
+            );
+            expect(finalMakerBalanceB).to.be.bignumber.equal(
+                initialMakerBalanceB.minus(makerAmounts[1].times(makerAssetAmount)),
+            );
+            expect(finalMakerZrxBalance).to.be.bignumber.equal(
+                initialMakerZrxBalance.plus(takerAmounts[0].times(takerAssetAmount)),
+            );
+            expect(finalTakerBalanceA).to.be.bignumber.equal(
+                initialTakerBalanceA.plus(makerAmounts[0].times(makerAssetAmount)),
+            );
+            expect(finalTakerBalanceB).to.be.bignumber.equal(
+                initialTakerBalanceB.plus(makerAmounts[1].times(makerAssetAmount)),
+            );
+            expect(finalTakerZrxBalance).to.be.bignumber.equal(
+                initialTakerZrxBalance.minus(takerAmounts[0].times(takerAssetAmount)),
+            );
+            expect(finalOwnerTakerAsset).to.be.equal(makerAddress);
+        });
+        it('should allow an order selling multiple assets to be partially filled', async () => {
+            const makerAmounts = [new BigNumber(10), new BigNumber(20)];
+            const makerNestedAssetData = [
+                assetDataUtils.encodeERC20AssetData(erc20TokenA.address),
+                assetDataUtils.encodeERC20AssetData(erc20TokenB.address),
+            ];
+            const makerAssetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(
+                makerAmounts,
+                makerNestedAssetData,
+            );
+            const makerAssetAmount = new BigNumber(30);
+            const takerAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
+            const takerAssetAmount = new BigNumber(10);
+            signedOrder = await orderFactory.newSignedOrderAsync({
+                makerAssetData,
+                takerAssetData,
+                makerAssetAmount,
+                takerAssetAmount,
+                makerFee: constants.ZERO_AMOUNT,
+                takerFee: constants.ZERO_AMOUNT,
+            });
+
+            const initialMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
+            const initialMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
+            const initialMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
+            const initialTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
+            const initialTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
+            const initialTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
+
+            const takerAssetFillAmount = takerAssetAmount.dividedToIntegerBy(2);
+            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, {
+                takerAssetFillAmount,
+            });
+
+            const finalMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
+            const finalMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
+            const finalMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
+            const finalTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
+            const finalTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
+            const finalTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
+
+            expect(finalMakerBalanceA).to.be.bignumber.equal(
+                initialMakerBalanceA.minus(
+                    makerAmounts[0].times(
+                        makerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
+                    ),
+                ),
+            );
+            expect(finalMakerBalanceB).to.be.bignumber.equal(
+                initialMakerBalanceB.minus(
+                    makerAmounts[1].times(
+                        makerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
+                    ),
+                ),
+            );
+            expect(finalMakerZrxBalance).to.be.bignumber.equal(
+                initialMakerZrxBalance.plus(
+                    takerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
+                ),
+            );
+            expect(finalTakerBalanceA).to.be.bignumber.equal(
+                initialTakerBalanceA.plus(
+                    makerAmounts[0].times(
+                        makerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
+                    ),
+                ),
+            );
+            expect(finalTakerBalanceB).to.be.bignumber.equal(
+                initialTakerBalanceB.plus(
+                    makerAmounts[1].times(
+                        makerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
+                    ),
+                ),
+            );
+            expect(finalTakerZrxBalance).to.be.bignumber.equal(
+                initialTakerZrxBalance.minus(
+                    takerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
+                ),
+            );
+        });
+        it('should allow an order buying multiple assets to be partially filled', async () => {
+            const takerAmounts = [new BigNumber(10), new BigNumber(20)];
+            const takerNestedAssetData = [
+                assetDataUtils.encodeERC20AssetData(erc20TokenA.address),
+                assetDataUtils.encodeERC20AssetData(erc20TokenB.address),
+            ];
+            const takerAssetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(
+                takerAmounts,
+                takerNestedAssetData,
+            );
+            const takerAssetAmount = new BigNumber(30);
+            const makerAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
+            const makerAssetAmount = new BigNumber(10);
+            signedOrder = await orderFactory.newSignedOrderAsync({
+                makerAssetData,
+                takerAssetData,
+                makerAssetAmount,
+                takerAssetAmount,
+                makerFee: constants.ZERO_AMOUNT,
+                takerFee: constants.ZERO_AMOUNT,
+            });
+
+            const initialMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
+            const initialMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
+            const initialMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
+            const initialTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
+            const initialTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
+            const initialTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
+
+            const takerAssetFillAmount = takerAssetAmount.dividedToIntegerBy(2);
+            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, {
+                takerAssetFillAmount,
+            });
+
+            const finalMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
+            const finalMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
+            const finalMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
+            const finalTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
+            const finalTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
+            const finalTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
+
+            expect(finalMakerBalanceA).to.be.bignumber.equal(
+                initialMakerBalanceA.plus(
+                    takerAmounts[0].times(
+                        takerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
+                    ),
+                ),
+            );
+            expect(finalMakerBalanceB).to.be.bignumber.equal(
+                initialMakerBalanceB.plus(
+                    takerAmounts[1].times(
+                        takerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
+                    ),
+                ),
+            );
+            expect(finalMakerZrxBalance).to.be.bignumber.equal(
+                initialMakerZrxBalance.minus(
+                    makerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
+                ),
+            );
+            expect(finalTakerBalanceA).to.be.bignumber.equal(
+                initialTakerBalanceA.minus(
+                    takerAmounts[0].times(
+                        takerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
+                    ),
+                ),
+            );
+            expect(finalTakerBalanceB).to.be.bignumber.equal(
+                initialTakerBalanceB.minus(
+                    takerAmounts[1].times(
+                        takerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
+                    ),
+                ),
+            );
+            expect(finalTakerZrxBalance).to.be.bignumber.equal(
+                initialTakerZrxBalance.plus(
+                    makerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
+                ),
+            );
+        });
+    });
+
     describe('getOrderInfo', () => {
         beforeEach(async () => {
             signedOrder = await orderFactory.newSignedOrderAsync();
diff --git a/packages/contracts/test/extensions/order_validator.ts b/packages/contracts/test/extensions/order_validator.ts
index 37bd1b0e2..37d7c4c5a 100644
--- a/packages/contracts/test/extensions/order_validator.ts
+++ b/packages/contracts/test/extensions/order_validator.ts
@@ -198,7 +198,7 @@ describe('OrderValidator', () => {
                 );
                 expect(newAllowance).to.be.bignumber.equal(ERC721_ALLOWANCE);
             });
-            it('should return an allowance of 1 when ERC721Proxy is approved for specific tokenId', async () => {
+            it('should return an allowance of 0 when ERC721Proxy is approved for specific tokenId', async () => {
                 await web3Wrapper.awaitTransactionSuccessAsync(
                     await erc721Token.mint.sendTransactionAsync(makerAddress, tokenId),
                     constants.AWAIT_TRANSACTION_MINED_MS,
@@ -213,7 +213,7 @@ describe('OrderValidator', () => {
                     makerAddress,
                     erc721AssetData,
                 );
-                expect(newAllowance).to.be.bignumber.equal(ERC721_ALLOWANCE);
+                expect(newAllowance).to.be.bignumber.equal(constants.ZERO_AMOUNT);
             });
         });
     });
@@ -248,8 +248,9 @@ describe('OrderValidator', () => {
                 await erc721Token.mint.sendTransactionAsync(makerAddress, tokenId),
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
+            const isApproved = true;
             await web3Wrapper.awaitTransactionSuccessAsync(
-                await erc721Token.approve.sendTransactionAsync(erc721Proxy.address, tokenId, {
+                await erc721Token.setApprovalForAll.sendTransactionAsync(erc721Proxy.address, isApproved, {
                     from: makerAddress,
                 }),
                 constants.AWAIT_TRANSACTION_MINED_MS,
@@ -311,8 +312,9 @@ describe('OrderValidator', () => {
                 await erc721Token.mint.sendTransactionAsync(takerAddress, tokenId),
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
+            const isApproved = true;
             await web3Wrapper.awaitTransactionSuccessAsync(
-                await erc721Token.approve.sendTransactionAsync(erc721Proxy.address, tokenId, {
+                await erc721Token.setApprovalForAll.sendTransactionAsync(erc721Proxy.address, isApproved, {
                     from: takerAddress,
                 }),
                 constants.AWAIT_TRANSACTION_MINED_MS,
@@ -465,8 +467,9 @@ describe('OrderValidator', () => {
                 await erc721Token.mint.sendTransactionAsync(takerAddress, tokenId),
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
+            const isApproved = true;
             await web3Wrapper.awaitTransactionSuccessAsync(
-                await erc721Token.approve.sendTransactionAsync(erc721Proxy.address, tokenId, {
+                await erc721Token.setApprovalForAll.sendTransactionAsync(erc721Proxy.address, isApproved, {
                     from: takerAddress,
                 }),
                 constants.AWAIT_TRANSACTION_MINED_MS,
diff --git a/packages/contracts/test/utils/constants.ts b/packages/contracts/test/utils/constants.ts
index cd21330e9..d2c3ab512 100644
--- a/packages/contracts/test/utils/constants.ts
+++ b/packages/contracts/test/utils/constants.ts
@@ -35,7 +35,7 @@ export const constants = {
     DUMMY_TOKEN_TOTAL_SUPPLY: new BigNumber(0),
     NULL_BYTES: '0x',
     NUM_DUMMY_ERC20_TO_DEPLOY: 3,
-    NUM_DUMMY_ERC721_TO_DEPLOY: 1,
+    NUM_DUMMY_ERC721_TO_DEPLOY: 2,
     NUM_ERC721_TOKENS_TO_MINT: 2,
     NULL_ADDRESS: '0x0000000000000000000000000000000000000000',
     UNLIMITED_ALLOWANCE_IN_BASE_UNITS: new BigNumber(2).pow(256).minus(1),
diff --git a/packages/contracts/test/utils/erc721_wrapper.ts b/packages/contracts/test/utils/erc721_wrapper.ts
index 3ef4e701d..e9da553d0 100644
--- a/packages/contracts/test/utils/erc721_wrapper.ts
+++ b/packages/contracts/test/utils/erc721_wrapper.ts
@@ -29,7 +29,8 @@ export class ERC721Wrapper {
         this._contractOwnerAddress = contractOwnerAddress;
     }
     public async deployDummyTokensAsync(): Promise<DummyERC721TokenContract[]> {
-        for (let i = 0; i < constants.NUM_DUMMY_ERC721_TO_DEPLOY; i++) {
+        // tslint:disable-next-line:no-unused-variable
+        for (const i of _.times(constants.NUM_DUMMY_ERC721_TO_DEPLOY)) {
             this._dummyTokenContracts.push(
                 await DummyERC721TokenContract.deployFrom0xArtifactAsync(
                     artifacts.DummyERC721Token,
@@ -61,7 +62,8 @@ export class ERC721Wrapper {
         this._initialTokenIdsByOwner = {};
         for (const dummyTokenContract of this._dummyTokenContracts) {
             for (const tokenOwnerAddress of this._tokenOwnerAddresses) {
-                for (let i = 0; i < constants.NUM_ERC721_TOKENS_TO_MINT; i++) {
+                // tslint:disable-next-line:no-unused-variable
+                for (const i of _.times(constants.NUM_ERC721_TOKENS_TO_MINT)) {
                     const tokenId = generatePseudoRandomSalt();
                     await this.mintAsync(dummyTokenContract.address, tokenId, tokenOwnerAddress);
                     if (_.isUndefined(this._initialTokenIdsByOwner[tokenOwnerAddress])) {
diff --git a/packages/contracts/tsconfig.json b/packages/contracts/tsconfig.json
index 8b29365cc..e0f85079a 100644
--- a/packages/contracts/tsconfig.json
+++ b/packages/contracts/tsconfig.json
@@ -26,6 +26,7 @@
         "./generated-artifacts/IWallet.json",
         "./generated-artifacts/InvalidERC721Receiver.json",
         "./generated-artifacts/MixinAuthorizable.json",
+        "./generated-artifacts/MultiAssetProxy.json",
         "./generated-artifacts/MultiSigWallet.json",
         "./generated-artifacts/MultiSigWalletWithTimeLock.json",
         "./generated-artifacts/OrderValidator.json",
diff --git a/packages/dev-tools-pages/package.json b/packages/dev-tools-pages/package.json
index eb320c103..4b13beb01 100644
--- a/packages/dev-tools-pages/package.json
+++ b/packages/dev-tools-pages/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/dev-tools-pages",
-    "version": "0.0.7",
+    "version": "0.0.8",
     "engines": {
         "node": ">=6.12"
     },
@@ -16,7 +16,7 @@
     },
     "license": "Apache-2.0",
     "dependencies": {
-        "@0x/react-shared": "^1.0.22",
+        "@0x/react-shared": "^1.0.23",
         "basscss": "^8.0.3",
         "bowser": "^1.9.3",
         "less": "^2.7.2",
diff --git a/packages/dev-utils/CHANGELOG.json b/packages/dev-utils/CHANGELOG.json
index 4f47f0f45..417a3c65e 100644
--- a/packages/dev-utils/CHANGELOG.json
+++ b/packages/dev-utils/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "1.0.19",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1542821676,
         "version": "1.0.18",
         "changes": [
diff --git a/packages/dev-utils/CHANGELOG.md b/packages/dev-utils/CHANGELOG.md
index 3ab8192c7..1842c6824 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
 
+## v1.0.19 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v1.0.18 - _November 21, 2018_
 
     * Dependencies updated
diff --git a/packages/dev-utils/README.md b/packages/dev-utils/README.md
index 73b0b8816..b85159dd8 100644
--- a/packages/dev-utils/README.md
+++ b/packages/dev-utils/README.md
@@ -27,6 +27,21 @@ If your project is in [TypeScript](https://www.typescriptlang.org/), add the fol
 }
 ```
 
+## Troubleshooting
+
+If you are still seeing TS type errors complaining about missing DOM types such as `Response`:
+
+```
+error TS2304: Cannot find name 'Response'.
+```
+
+Then you need to explicitly add the `dom` lib to your compiler options in `tsconfig.json`. The `dom` library is included by default, but customizing the `lib` option can cause it to be dropped.
+
+```
+"compilerOptions": {
+    "lib": [..., "dom"],
+```
+
 ## Contributing
 
 We welcome improvements and fixes from the wider community! To report bugs within this package, please create an issue in this repository.
diff --git a/packages/dev-utils/package.json b/packages/dev-utils/package.json
index e7cd62a81..a3b5c9090 100644
--- a/packages/dev-utils/package.json
+++ b/packages/dev-utils/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/dev-utils",
-    "version": "1.0.18",
+    "version": "1.0.19",
     "engines": {
         "node": ">=6.12"
     },
@@ -41,11 +41,11 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/subproviders": "^2.1.5",
+        "@0x/subproviders": "^2.1.6",
         "@0x/types": "^1.3.0",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "@types/web3-provider-engine": "^14.0.0",
         "chai": "^4.0.1",
         "ethereum-types": "^1.1.2",
diff --git a/packages/ethereum-types/src/index.ts b/packages/ethereum-types/src/index.ts
index eff38711a..9430fdc98 100644
--- a/packages/ethereum-types/src/index.ts
+++ b/packages/ethereum-types/src/index.ts
@@ -283,6 +283,11 @@ export interface RawLogEntry {
 
 export enum SolidityTypes {
     Address = 'address',
+    Bool = 'bool',
+    Bytes = 'bytes',
+    Int = 'int',
+    String = 'string',
+    Tuple = 'tuple',
     Uint256 = 'uint256',
     Uint8 = 'uint8',
     Uint = 'uint',
diff --git a/packages/fill-scenarios/CHANGELOG.json b/packages/fill-scenarios/CHANGELOG.json
index f83a6612d..58ba49509 100644
--- a/packages/fill-scenarios/CHANGELOG.json
+++ b/packages/fill-scenarios/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "1.0.14",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1542821676,
         "version": "1.0.13",
         "changes": [
diff --git a/packages/fill-scenarios/CHANGELOG.md b/packages/fill-scenarios/CHANGELOG.md
index 3c39e1650..aa7df302e 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
 
+## v1.0.14 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v1.0.13 - _November 21, 2018_
 
     * Dependencies updated
diff --git a/packages/fill-scenarios/package.json b/packages/fill-scenarios/package.json
index e91ed8a4e..b29eb674c 100644
--- a/packages/fill-scenarios/package.json
+++ b/packages/fill-scenarios/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/fill-scenarios",
-    "version": "1.0.13",
+    "version": "1.0.14",
     "description": "0x order fill scenario generator",
     "main": "lib/index.js",
     "types": "lib/index.d.ts",
@@ -28,14 +28,14 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/abi-gen-wrappers": "^1.1.0",
-        "@0x/base-contract": "^3.0.7",
-        "@0x/contract-artifacts": "^1.1.0",
-        "@0x/order-utils": "^3.0.3",
+        "@0x/abi-gen-wrappers": "^2.0.0",
+        "@0x/base-contract": "^3.0.8",
+        "@0x/contract-artifacts": "^1.1.2",
+        "@0x/order-utils": "^3.0.4",
         "@0x/types": "^1.3.0",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "ethereum-types": "^1.1.2",
         "ethers": "~4.0.4",
         "lodash": "^4.17.5"
diff --git a/packages/instant/.dogfood.discharge.json b/packages/instant/.dogfood.discharge.json
index cea579c27..b0e4edaff 100644
--- a/packages/instant/.dogfood.discharge.json
+++ b/packages/instant/.dogfood.discharge.json
@@ -1,6 +1,6 @@
 {
     "domain": "0x-instant-dogfood",
-    "build_command": "WEBPACK_OUTPUT_PATH=public yarn build:umd:prod --env.dogfood",
+    "build_command": "WEBPACK_OUTPUT_PATH=public yarn build --env.discharge_target=dogfood",
     "upload_directory": "public",
     "index_key": "index.html",
     "error_key": "index.html",
diff --git a/packages/instant/.production.discharge.json b/packages/instant/.production.discharge.json
new file mode 100644
index 000000000..4aa5337ba
--- /dev/null
+++ b/packages/instant/.production.discharge.json
@@ -0,0 +1,13 @@
+{
+    "domain": "instant.0xproject.com",
+    "build_command": "yarn build --env.discharge_target=production",
+    "upload_directory": "umd",
+    "index_key": "instant.js",
+    "error_key": "404.html",
+    "trailing_slashes": true,
+    "cache": 3600,
+    "aws_profile": "0xproject",
+    "aws_region": "us-east-1",
+    "cdn": true,
+    "dns_configured": true
+}
diff --git a/packages/instant/.staging.discharge.json b/packages/instant/.staging.discharge.json
index 9e63cb110..56ffee4e9 100644
--- a/packages/instant/.staging.discharge.json
+++ b/packages/instant/.staging.discharge.json
@@ -1,6 +1,6 @@
 {
     "domain": "0x-instant-staging",
-    "build_command": "WEBPACK_OUTPUT_PATH=public yarn build:umd:prod --env.staging",
+    "build_command": "WEBPACK_OUTPUT_PATH=public yarn build --env.discharge_target=staging",
     "upload_directory": "public",
     "index_key": "index.html",
     "error_key": "index.html",
diff --git a/packages/instant/README.md b/packages/instant/README.md
index b83a10508..45a871124 100644
--- a/packages/instant/README.md
+++ b/packages/instant/README.md
@@ -2,39 +2,11 @@
 
 ## Installation
 
-```bash
-yarn add @0x/instant
-```
-
-**Import**
-
-**CommonJS module**
-
-```typescript
-import { ZeroExInstant } from '@0x/instant';
-```
-
-or
-
-```javascript
-var ZeroExInstant = require('@0x/instant').ZeroExInstant;
-```
-
-If your project is in [TypeScript](https://www.typescriptlang.org/), add the following to your `tsconfig.json`:
-
-```json
-"compilerOptions": {
-    "typeRoots": ["node_modules/@0x/typescript-typings/types", "node_modules/@types"],
-}
-```
-
-**UMD Module**
-
-The package is also available as a UMD module named `zeroExInstant`.
+The package is available as a UMD module named `zeroExInstant` at https://instant.0xproject.com/instant.js.
 
 ```html
 <head>
-    <script type="text/javascript" src="[zeroExInstantUMDPath]" charset="utf-8"></script>
+    <script type="text/javascript" src="https://instant.0xproject.com/instant.js" charset="utf-8"></script>
 </head>
 <body>
     <div id="zeroExInstantContainer"></div>
@@ -48,23 +20,31 @@ The package is also available as a UMD module named `zeroExInstant`.
 
 ## Deploying
 
-You can deploy a work-in-progress version of 0x Instant at http://0x-instant-dogfood.s3-website-us-east-1.amazonaws.com for easy sharing.
+You can deploy a work-in-progress version of 0x Instant at http://0x-instant-dogfood.s3-website-us-east-1.amazonaws.com/instant.js for easy sharing.
 
-To build and deploy the site run
+To build and deploy the bundle run
 
 ```
 yarn deploy_dogfood
 ```
 
-We also have a staging bucket that is to be updated less frequently can be used to share instant externally: http://0x-instant-staging.s3-website-us-east-1.amazonaws.com/
+We also have a staging bucket that is to be updated less frequently can be used to share a beta version of instant externally: http://0x-instant-staging.s3-website-us-east-1.amazonaws.com/instant.js
 
-To build and deploy to this bucket, run
+To build and deploy to this bundle, run
 
 ```
 yarn deploy_staging
 ```
 
-**NOTE: On deploying the site, it will say the site is available at a non-existent URL. Please ignore and use the (now updated) URL above.**
+Finally, we have our live production bundle that is only meant to be updated with stable, polished releases: https://instant.0xproject.com/instant.js
+
+To build and deploy to this bundle, run
+
+```
+yarn deploy_production
+```
+
+**NOTE: On deploying the site to staging and dogfood, it will say the site is available at a non-existent URL. Please ignore and use the (now updated) URL above.**
 
 ## Contributing
 
diff --git a/packages/instant/package.json b/packages/instant/package.json
index fd2f12857..ed8c460d9 100644
--- a/packages/instant/package.json
+++ b/packages/instant/package.json
@@ -1,19 +1,16 @@
 {
     "name": "@0x/instant",
-    "version": "1.0.1",
+    "version": "1.0.2",
     "engines": {
         "node": ">=6.12"
     },
+    "private": true,
     "description": "0x Instant React Component",
-    "main": "lib/index.js",
-    "types": "lib/index.d.ts",
+    "main": "umd/instant.js",
+    "private": true,
     "scripts": {
-        "build": "yarn build:all",
-        "build:all": "run-p build:umd:prod build:commonjs",
-        "build:umd:prod": "webpack --mode production",
-        "build:commonjs": "tsc -b",
+        "build": "webpack --mode production",
         "build:ci": "yarn build",
-        "watch_without_deps": "tsc -w",
         "dev": "webpack-dev-server --mode development",
         "lint": "tslint --format stylish --project .",
         "test": "jest",
@@ -23,14 +20,12 @@
         "clean": "shx rm -rf lib coverage scripts",
         "deploy_dogfood": "discharge deploy -c .dogfood.discharge.json",
         "deploy_staging": "discharge deploy -c .staging.discharge.json",
+        "deploy_production": "discharge deploy -c .production.discharge.json",
         "manual:postpublish": "yarn build; node ./scripts/postpublish.js"
     },
     "config": {
         "postpublish": {
-            "assets": [
-                "packages/instant/umd/instant.js",
-                "packages/instant/umd/instant.js.map"
-            ]
+            "assets": ["packages/instant/umd/instant.js", "packages/instant/umd/instant.js.map"]
         }
     },
     "repository": {
@@ -45,14 +40,14 @@
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/instant/README.md",
     "dependencies": {
         "@0x/assert": "^1.0.18",
-        "@0x/asset-buyer": "^3.0.1",
+        "@0x/asset-buyer": "^3.0.2",
         "@0x/json-schemas": "^2.1.2",
-        "@0x/order-utils": "^3.0.3",
-        "@0x/subproviders": "^2.1.5",
+        "@0x/order-utils": "^3.0.4",
+        "@0x/subproviders": "^2.1.6",
         "@0x/types": "^1.3.0",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "bowser": "^1.9.4",
         "copy-to-clipboard": "^3.0.8",
         "ethereum-types": "^1.1.2",
@@ -101,6 +96,6 @@
         "webpack-dev-server": "^3.1.9"
     },
     "publishConfig": {
-        "access": "public"
+        "access": "private"
     }
 }
diff --git a/packages/instant/src/components/buy_button.tsx b/packages/instant/src/components/buy_button.tsx
index 8b6121e43..eeb42d6fc 100644
--- a/packages/instant/src/components/buy_button.tsx
+++ b/packages/instant/src/components/buy_button.tsx
@@ -8,6 +8,7 @@ import { oc } from 'ts-optchain';
 import { WEB_3_WRAPPER_TRANSACTION_FAILED_ERROR_MSG_PREFIX } from '../constants';
 import { ColorOption } from '../style/theme';
 import { AffiliateInfo, ZeroExInstantError } from '../types';
+import { analytics } from '../util/analytics';
 import { gasPriceEstimator } from '../util/gas_price_estimator';
 import { util } from '../util/util';
 
@@ -59,6 +60,7 @@ export class BuyButton extends React.Component<BuyButtonProps> {
         // if we don't have a balance for the user, let the transaction through, it will be handled by the wallet
         const hasSufficientEth = _.isUndefined(accountEthBalanceInWei) || accountEthBalanceInWei.gte(ethNeededForBuy);
         if (!hasSufficientEth) {
+            analytics.trackBuyNotEnoughEth(buyQuote);
             this.props.onValidationFail(buyQuote, ZeroExInstantError.InsufficientETH);
             return;
         }
@@ -66,6 +68,7 @@ export class BuyButton extends React.Component<BuyButtonProps> {
         const gasInfo = await gasPriceEstimator.getGasInfoAsync();
         const feeRecipient = oc(affiliateInfo).feeRecipient();
         try {
+            analytics.trackBuyStarted(buyQuote);
             txHash = await assetBuyer.executeBuyQuoteAsync(buyQuote, {
                 feeRecipient,
                 takerAddress: accountAddress,
@@ -74,9 +77,11 @@ export class BuyButton extends React.Component<BuyButtonProps> {
         } catch (e) {
             if (e instanceof Error) {
                 if (e.message === AssetBuyerError.SignatureRequestDenied) {
+                    analytics.trackBuySignatureDenied(buyQuote);
                     this.props.onSignatureDenied(buyQuote);
                     return;
                 } else if (e.message === AssetBuyerError.TransactionValueTooLow) {
+                    analytics.trackBuySimulationFailed(buyQuote);
                     this.props.onValidationFail(buyQuote, AssetBuyerError.TransactionValueTooLow);
                     return;
                 }
@@ -87,14 +92,17 @@ export class BuyButton extends React.Component<BuyButtonProps> {
         const expectedEndTimeUnix = startTimeUnix + gasInfo.estimatedTimeMs;
         this.props.onBuyProcessing(buyQuote, txHash, startTimeUnix, expectedEndTimeUnix);
         try {
+            analytics.trackBuyTxSubmitted(buyQuote, txHash, startTimeUnix, expectedEndTimeUnix);
             await web3Wrapper.awaitTransactionSuccessAsync(txHash);
         } catch (e) {
             if (e instanceof Error && e.message.startsWith(WEB_3_WRAPPER_TRANSACTION_FAILED_ERROR_MSG_PREFIX)) {
+                analytics.trackBuyTxFailed(buyQuote, txHash, startTimeUnix, expectedEndTimeUnix);
                 this.props.onBuyFailure(buyQuote, txHash);
                 return;
             }
             throw e;
         }
+        analytics.trackBuyTxSucceeded(buyQuote, txHash, startTimeUnix, expectedEndTimeUnix);
         this.props.onBuySuccess(buyQuote, txHash);
     };
 }
diff --git a/packages/instant/src/components/erc20_asset_amount_input.tsx b/packages/instant/src/components/erc20_asset_amount_input.tsx
index b825255c4..ff900842a 100644
--- a/packages/instant/src/components/erc20_asset_amount_input.tsx
+++ b/packages/instant/src/components/erc20_asset_amount_input.tsx
@@ -64,6 +64,9 @@ export class ERC20AssetAmountInput extends React.Component<ERC20AssetAmountInput
                         maxFontSizePx={this.props.startingFontSizePx}
                         onAmountChange={this._handleChange}
                         onFontSizeChange={this._handleFontSizeChange}
+                        hasAutofocus={true}
+                        /* We send in a key of asset data to force a rerender of this component when the user selects a new asset.  We do this so the autofocus attribute will bring focus onto this input */
+                        key={asset.assetData}
                     />
                 </Container>
                 <Container
diff --git a/packages/instant/src/components/erc20_token_selector.tsx b/packages/instant/src/components/erc20_token_selector.tsx
index 1b1921acb..f7d5a4fe4 100644
--- a/packages/instant/src/components/erc20_token_selector.tsx
+++ b/packages/instant/src/components/erc20_token_selector.tsx
@@ -3,6 +3,7 @@ import * as React from 'react';
 
 import { ColorOption } from '../style/theme';
 import { ERC20Asset } from '../types';
+import { analytics } from '../util/analytics';
 import { assetUtils } from '../util/asset';
 
 import { SearchInput } from './search_input';
@@ -18,12 +19,12 @@ export interface ERC20TokenSelectorProps {
 }
 
 export interface ERC20TokenSelectorState {
-    searchQuery?: string;
+    searchQuery: string;
 }
 
 export class ERC20TokenSelector extends React.Component<ERC20TokenSelectorProps> {
     public state: ERC20TokenSelectorState = {
-        searchQuery: undefined,
+        searchQuery: '',
     };
     public render(): React.ReactNode {
         const { tokens, onTokenSelect } = this.props;
@@ -57,13 +58,14 @@ export class ERC20TokenSelector extends React.Component<ERC20TokenSelectorProps>
         this.setState({
             searchQuery,
         });
+        analytics.trackTokenSelectorSearched(searchQuery);
     };
     private readonly _isTokenQueryMatch = (token: ERC20Asset): boolean => {
         const { searchQuery } = this.state;
-        if (_.isUndefined(searchQuery)) {
+        const searchQueryLowerCase = searchQuery.toLowerCase().trim();
+        if (searchQueryLowerCase === '') {
             return true;
         }
-        const searchQueryLowerCase = searchQuery.toLowerCase();
         const tokenName = token.metaData.name.toLowerCase();
         const tokenSymbol = token.metaData.symbol.toLowerCase();
         return _.startsWith(tokenSymbol, searchQueryLowerCase) || _.startsWith(tokenName, searchQueryLowerCase);
diff --git a/packages/instant/src/components/install_wallet_panel_content.tsx b/packages/instant/src/components/install_wallet_panel_content.tsx
index 88c26f59c..481d82da0 100644
--- a/packages/instant/src/components/install_wallet_panel_content.tsx
+++ b/packages/instant/src/components/install_wallet_panel_content.tsx
@@ -8,7 +8,9 @@ import {
 } from '../constants';
 import { ColorOption } from '../style/theme';
 import { Browser } from '../types';
+import { analytics } from '../util/analytics';
 import { envUtil } from '../util/env';
+import { util } from '../util/util';
 
 import { MetaMaskLogo } from './meta_mask_logo';
 import { StandardPanelContent, StandardPanelContentProps } from './standard_panel_content';
@@ -45,6 +47,10 @@ export class InstallWalletPanelContent extends React.Component<InstallWalletPane
             default:
                 break;
         }
+        const onActionClick = () => {
+            analytics.trackInstallWalletModalClickedGet();
+            util.createOpenUrlInNewWindow(actionUrl)();
+        };
         return {
             image: <MetaMaskLogo width={85} height={80} />,
             title: 'Install MetaMask',
@@ -52,10 +58,11 @@ export class InstallWalletPanelContent extends React.Component<InstallWalletPane
             moreInfoSettings: {
                 href: META_MASK_SITE_URL,
                 text: 'What is MetaMask?',
+                onClick: analytics.trackInstallWalletModalClickedExplanation,
             },
             action: (
                 <Button
-                    href={actionUrl}
+                    onClick={onActionClick}
                     width="100%"
                     fontColor={ColorOption.white}
                     backgroundColor={ColorOption.darkOrange}
diff --git a/packages/instant/src/components/instant_heading.tsx b/packages/instant/src/components/instant_heading.tsx
index 002695269..808c6dc7f 100644
--- a/packages/instant/src/components/instant_heading.tsx
+++ b/packages/instant/src/components/instant_heading.tsx
@@ -107,7 +107,14 @@ export class InstantHeading extends React.Component<InstantHeadingProps, {}> {
 
     private readonly _renderEthAmount = (): React.ReactNode => {
         return (
-            <Text fontSize="16px" fontColor={ColorOption.white} fontWeight={500}>
+            <Text
+                fontSize="16px"
+                textAlign="right"
+                width="100%"
+                fontColor={ColorOption.white}
+                fontWeight={500}
+                noWrap={true}
+            >
                 {format.ethBaseUnitAmount(
                     this.props.totalEthBaseUnitAmount,
                     4,
@@ -119,7 +126,7 @@ export class InstantHeading extends React.Component<InstantHeadingProps, {}> {
 
     private readonly _renderDollarAmount = (): React.ReactNode => {
         return (
-            <Text fontSize="16px" fontColor={ColorOption.white}>
+            <Text fontSize="16px" textAlign="right" width="100%" fontColor={ColorOption.white} noWrap={true}>
                 {format.ethBaseUnitAmountInUsd(
                     this.props.totalEthBaseUnitAmount,
                     this.props.ethUsdPrice,
diff --git a/packages/instant/src/components/payment_method.tsx b/packages/instant/src/components/payment_method.tsx
index ebcd62f35..c23b43267 100644
--- a/packages/instant/src/components/payment_method.tsx
+++ b/packages/instant/src/components/payment_method.tsx
@@ -26,7 +26,7 @@ export interface PaymentMethodProps {
 export class PaymentMethod extends React.Component<PaymentMethodProps> {
     public render(): React.ReactNode {
         return (
-            <Container padding="20px" width="100%">
+            <Container padding="20px" width="100%" height="133px">
                 <Container marginBottom="12px">
                     <Flex justify="space-between">
                         <Text
@@ -83,8 +83,7 @@ export class PaymentMethod extends React.Component<PaymentMethodProps> {
         const colors = { primaryColor, secondaryColor };
         switch (account.state) {
             case AccountState.Loading:
-                // Just take up the same amount of space as the other states.
-                return <Container height="52px" />;
+                return null;
             case AccountState.Locked:
                 return (
                     <WalletPrompt
diff --git a/packages/instant/src/components/payment_method_dropdown.tsx b/packages/instant/src/components/payment_method_dropdown.tsx
index b330dbcd6..872ac0831 100644
--- a/packages/instant/src/components/payment_method_dropdown.tsx
+++ b/packages/instant/src/components/payment_method_dropdown.tsx
@@ -1,8 +1,9 @@
 import { BigNumber } from '@0x/utils';
-import copy from 'copy-to-clipboard';
+import * as copy from 'copy-to-clipboard';
 import * as React from 'react';
 
 import { Network } from '../types';
+import { analytics } from '../util/analytics';
 import { envUtil } from '../util/env';
 import { etherscanUtil } from '../util/etherscan';
 import { format } from '../util/format';
@@ -20,7 +21,14 @@ export class PaymentMethodDropdown extends React.Component<PaymentMethodDropdown
         const { accountAddress, accountEthBalanceInWei } = this.props;
         const value = format.ethAddress(accountAddress);
         const label = format.ethBaseUnitAmount(accountEthBalanceInWei, 4, '') as string;
-        return <Dropdown value={value} label={label} items={this._getDropdownItemConfigs()} />;
+        return (
+            <Dropdown
+                value={value}
+                label={label}
+                items={this._getDropdownItemConfigs()}
+                onOpen={analytics.trackPaymentMethodDropdownOpened}
+            />
+        );
     }
     private readonly _getDropdownItemConfigs = (): DropdownItemConfig[] => {
         if (envUtil.isMobileOperatingSystem()) {
@@ -37,11 +45,15 @@ export class PaymentMethodDropdown extends React.Component<PaymentMethodDropdown
         return [viewOnEtherscan, copyAddressToClipboard];
     };
     private readonly _handleEtherscanClick = (): void => {
+        analytics.trackPaymentMethodOpenedEtherscan();
+
         const { accountAddress, network } = this.props;
         const etherscanUrl = etherscanUtil.getEtherScanEthAddressIfExists(accountAddress, network);
         window.open(etherscanUrl, '_blank');
     };
     private readonly _handleCopyToClipboardClick = (): void => {
+        analytics.trackPaymentMethodCopiedAddress();
+
         const { accountAddress } = this.props;
         copy(accountAddress);
     };
diff --git a/packages/instant/src/components/scaling_amount_input.tsx b/packages/instant/src/components/scaling_amount_input.tsx
index 5dc719293..0861bbe05 100644
--- a/packages/instant/src/components/scaling_amount_input.tsx
+++ b/packages/instant/src/components/scaling_amount_input.tsx
@@ -18,6 +18,7 @@ export interface ScalingAmountInputProps {
     value?: BigNumber;
     onAmountChange: (value?: BigNumber) => void;
     onFontSizeChange: (fontSizePx: number) => void;
+    hasAutofocus: boolean;
 }
 interface ScalingAmountInputState {
     stringValue: string;
@@ -29,6 +30,7 @@ export class ScalingAmountInput extends React.Component<ScalingAmountInputProps,
         onAmountChange: util.boundNoop,
         onFontSizeChange: util.boundNoop,
         isDisabled: false,
+        hasAutofocus: false,
     };
     public constructor(props: ScalingAmountInputProps) {
         super(props);
@@ -64,6 +66,7 @@ export class ScalingAmountInput extends React.Component<ScalingAmountInputProps,
                 placeholder="0.00"
                 emptyInputWidthCh={3.5}
                 isDisabled={this.props.isDisabled}
+                hasAutofocus={this.props.hasAutofocus}
             />
         );
     }
diff --git a/packages/instant/src/components/scaling_input.tsx b/packages/instant/src/components/scaling_input.tsx
index e1599a316..791692257 100644
--- a/packages/instant/src/components/scaling_input.tsx
+++ b/packages/instant/src/components/scaling_input.tsx
@@ -28,6 +28,7 @@ export interface ScalingInputProps {
     maxLength?: number;
     scalingSettings: ScalingSettings;
     isDisabled: boolean;
+    hasAutofocus: boolean;
 }
 
 export interface ScalingInputState {
@@ -51,6 +52,7 @@ export class ScalingInput extends React.Component<ScalingInputProps, ScalingInpu
         maxLength: 7,
         scalingSettings: defaultScalingSettings,
         isDisabled: false,
+        hasAutofocus: false,
     };
     public state: ScalingInputState = {
         inputWidthPxAtPhaseChange: undefined,
@@ -96,6 +98,12 @@ export class ScalingInput extends React.Component<ScalingInputProps, ScalingInpu
             inputWidthPx: this._getInputWidthInPx(),
         };
     }
+    public componentDidMount(): void {
+        // Trigger an initial notification of the calculated fontSize.
+        const currentPhase = ScalingInput.getPhaseFromProps(this.props);
+        const currentFontSize = ScalingInput.calculateFontSizeFromProps(this.props, currentPhase);
+        this.props.onFontSizeChange(currentFontSize);
+    }
     public componentDidUpdate(
         prevProps: ScalingInputProps,
         prevState: ScalingInputState,
@@ -123,7 +131,7 @@ export class ScalingInput extends React.Component<ScalingInputProps, ScalingInpu
         }
     }
     public render(): React.ReactNode {
-        const { isDisabled, fontColor, onChange, placeholder, value, maxLength } = this.props;
+        const { hasAutofocus, isDisabled, fontColor, onChange, placeholder, value, maxLength } = this.props;
         const phase = ScalingInput.getPhaseFromProps(this.props);
         return (
             <Input
@@ -136,6 +144,7 @@ export class ScalingInput extends React.Component<ScalingInputProps, ScalingInpu
                 width={this._calculateWidth(phase)}
                 maxLength={maxLength}
                 disabled={isDisabled}
+                autoFocus={hasAutofocus}
             />
         );
     }
diff --git a/packages/instant/src/components/standard_panel_content.tsx b/packages/instant/src/components/standard_panel_content.tsx
index 582b3318e..79b7bff24 100644
--- a/packages/instant/src/components/standard_panel_content.tsx
+++ b/packages/instant/src/components/standard_panel_content.tsx
@@ -1,6 +1,7 @@
 import * as React from 'react';
 
 import { ColorOption } from '../style/theme';
+import { util } from '../util/util';
 
 import { Container } from './ui/container';
 import { Flex } from './ui/flex';
@@ -9,6 +10,7 @@ import { Text } from './ui/text';
 export interface MoreInfoSettings {
     text: string;
     href: string;
+    onClick?: () => void;
 }
 
 export interface StandardPanelContentProps {
@@ -21,6 +23,15 @@ export interface StandardPanelContentProps {
 
 const SPACING_BETWEEN_PX = '20px';
 
+const onMoreInfoClick = (href: string, onClick?: () => void) => {
+    return () => {
+        if (onClick) {
+            onClick();
+        }
+        util.createOpenUrlInNewWindow(href)();
+    };
+};
+
 export const StandardPanelContent: React.StatelessComponent<StandardPanelContentProps> = ({
     image,
     title,
@@ -50,7 +61,7 @@ export const StandardPanelContent: React.StatelessComponent<StandardPanelContent
                         fontSize="13px"
                         textDecorationLine="underline"
                         fontColor={ColorOption.lightGrey}
-                        href={moreInfoSettings.href}
+                        onClick={onMoreInfoClick(moreInfoSettings.href, moreInfoSettings.onClick)}
                     >
                         {moreInfoSettings.text}
                     </Text>
diff --git a/packages/instant/src/components/standard_sliding_panel.tsx b/packages/instant/src/components/standard_sliding_panel.tsx
index f587ff79a..9f517d273 100644
--- a/packages/instant/src/components/standard_sliding_panel.tsx
+++ b/packages/instant/src/components/standard_sliding_panel.tsx
@@ -1,6 +1,6 @@
 import * as React from 'react';
 
-import { SlideAnimationState, StandardSlidingPanelContent, StandardSlidingPanelSettings } from '../types';
+import { StandardSlidingPanelContent, StandardSlidingPanelSettings } from '../types';
 
 import { InstallWalletPanelContent } from './install_wallet_panel_content';
 import { SlidingPanel } from './sliding_panel';
diff --git a/packages/instant/src/components/timed_progress_bar.tsx b/packages/instant/src/components/timed_progress_bar.tsx
index 8465b9cd0..fb3927088 100644
--- a/packages/instant/src/components/timed_progress_bar.tsx
+++ b/packages/instant/src/components/timed_progress_bar.tsx
@@ -1,8 +1,9 @@
 import * as _ from 'lodash';
+import { transparentize } from 'polished';
 import * as React from 'react';
 
 import { PROGRESS_FINISH_ANIMATION_TIME_MS, PROGRESS_STALL_AT_WIDTH } from '../constants';
-import { ColorOption, css, keyframes, styled } from '../style/theme';
+import { ColorOption, css, keyframes, styled, ThemeConsumer } from '../style/theme';
 
 import { Container } from './ui/container';
 
@@ -93,8 +94,16 @@ export interface ProgressBarProps extends ProgressProps {}
 
 export const ProgressBar: React.ComponentType<ProgressBarProps & React.ClassAttributes<{}>> = React.forwardRef(
     (props, ref) => (
-        <Container width="100%" backgroundColor={ColorOption.lightGrey} borderRadius="6px">
-            <Progress {...props} ref={ref as any} />
-        </Container>
+        <ThemeConsumer>
+            {theme => (
+                <Container
+                    width="100%"
+                    borderRadius="6px"
+                    rawBackgroundColor={transparentize(0.5, theme[ColorOption.primaryColor])}
+                >
+                    <Progress {...props} ref={ref as any} />
+                </Container>
+            )}
+        </ThemeConsumer>
     ),
 );
diff --git a/packages/instant/src/components/ui/container.tsx b/packages/instant/src/components/ui/container.tsx
index 4dafe1386..e7d909d92 100644
--- a/packages/instant/src/components/ui/container.tsx
+++ b/packages/instant/src/components/ui/container.tsx
@@ -27,7 +27,9 @@ export interface ContainerProps {
     borderBottom?: string;
     className?: string;
     backgroundColor?: ColorOption;
+    rawBackgroundColor?: string;
     hasBoxShadow?: boolean;
+    isHidden?: boolean;
     zIndex?: number;
     whiteSpace?: string;
     opacity?: number;
@@ -38,6 +40,16 @@ export interface ContainerProps {
     flexGrow?: string | number;
 }
 
+const getBackgroundColor = (theme: any, backgroundColor?: ColorOption, rawBackgroundColor?: string): string => {
+    if (backgroundColor) {
+        return theme[backgroundColor] as string;
+    }
+    if (rawBackgroundColor) {
+        return rawBackgroundColor;
+    }
+    return 'none';
+};
+
 export const Container =
     styled.div <
     ContainerProps >
@@ -70,7 +82,8 @@ export const Container =
         ${props => props.width && stylesForMedia<string>('width', props.width)}
         ${props => props.height && stylesForMedia<string>('height', props.height)}
         ${props => props.borderRadius && stylesForMedia<string>('border-radius', props.borderRadius)}
-        background-color: ${props => (props.backgroundColor ? props.theme[props.backgroundColor] : 'none')};
+        ${props => (props.isHidden ? 'visibility: hidden;' : '')}
+        background-color: ${props => getBackgroundColor(props.theme, props.backgroundColor, props.rawBackgroundColor)};
         border-color: ${props => (props.borderColor ? props.theme[props.borderColor] : 'none')};
         &:hover {
             ${props =>
diff --git a/packages/instant/src/components/ui/dropdown.tsx b/packages/instant/src/components/ui/dropdown.tsx
index 3a23f456d..02e87d639 100644
--- a/packages/instant/src/components/ui/dropdown.tsx
+++ b/packages/instant/src/components/ui/dropdown.tsx
@@ -19,6 +19,7 @@ export interface DropdownProps {
     value: string;
     label?: string;
     items: DropdownItemConfig[];
+    onOpen?: () => void;
 }
 
 export interface DropdownState {
@@ -97,9 +98,14 @@ export class Dropdown extends React.Component<DropdownProps, DropdownState> {
         if (_.isEmpty(this.props.items)) {
             return;
         }
+        const isOpen = !this.state.isOpen;
         this.setState({
-            isOpen: !this.state.isOpen,
+            isOpen,
         });
+
+        if (isOpen && this.props.onOpen) {
+            this.props.onOpen();
+        }
     };
     private readonly _closeDropdown = (): void => {
         this.setState({
diff --git a/packages/instant/src/components/ui/text.tsx b/packages/instant/src/components/ui/text.tsx
index fd14cc4d1..282477758 100644
--- a/packages/instant/src/components/ui/text.tsx
+++ b/packages/instant/src/components/ui/text.tsx
@@ -1,4 +1,3 @@
-import { darken } from 'polished';
 import * as React from 'react';
 
 import { ColorOption, styled } from '../../style/theme';
@@ -11,6 +10,7 @@ export interface TextProps {
     fontSize?: string;
     opacity?: number;
     letterSpacing?: string;
+    textAlign?: string;
     textTransform?: string;
     lineHeight?: string;
     className?: string;
@@ -22,6 +22,7 @@ export interface TextProps {
     noWrap?: boolean;
     display?: string;
     href?: string;
+    width?: string;
 }
 
 export const Text: React.StatelessComponent<TextProps> = ({ href, onClick, ...rest }) => {
@@ -29,7 +30,7 @@ export const Text: React.StatelessComponent<TextProps> = ({ href, onClick, ...re
     return <StyledText {...rest} onClick={computedOnClick} />;
 };
 
-const darkenOnHoverAmount = 0.3;
+const opacityOnHoverAmount = 0.5;
 export const StyledText =
     styled.div <
     TextProps >
@@ -51,9 +52,10 @@ export const StyledText =
         ${props => (props.display ? `display: ${props.display}` : '')};
         ${props => (props.letterSpacing ? `letter-spacing: ${props.letterSpacing}` : '')};
         ${props => (props.textTransform ? `text-transform: ${props.textTransform}` : '')};
+        ${props => (props.textAlign ? `text-align: ${props.textAlign}` : '')};
+        ${props => (props.width ? `width: ${props.width}` : '')};
         &:hover {
-            ${props =>
-                props.onClick ? `color: ${darken(darkenOnHoverAmount, props.theme[props.fontColor || 'white'])}` : ''};
+            ${props => (props.onClick ? `opacity: ${opacityOnHoverAmount};` : '')};
         }
     }
 `;
diff --git a/packages/instant/src/components/zero_ex_instant_container.tsx b/packages/instant/src/components/zero_ex_instant_container.tsx
index 47c938472..8a809ee31 100644
--- a/packages/instant/src/components/zero_ex_instant_container.tsx
+++ b/packages/instant/src/components/zero_ex_instant_container.tsx
@@ -11,21 +11,20 @@ import { SelectedAssetBuyOrderStateButtons } from '../containers/selected_asset_
 import { SelectedAssetInstantHeading } from '../containers/selected_asset_instant_heading';
 import { ColorOption } from '../style/theme';
 import { zIndex } from '../style/z_index';
-import { OrderProcessState, SlideAnimationState } from '../types';
+import { SlideAnimationState } from '../types';
+import { analytics, TokenSelectorClosedVia } from '../util/analytics';
 
 import { CSSReset } from './css_reset';
 import { SlidingPanel } from './sliding_panel';
 import { Container } from './ui/container';
 import { Flex } from './ui/flex';
 
-export interface ZeroExInstantContainerProps {
-    orderProcessState: OrderProcessState;
-}
+export interface ZeroExInstantContainerProps {}
 export interface ZeroExInstantContainerState {
     tokenSelectionPanelAnimationState: SlideAnimationState;
 }
 
-export class ZeroExInstantContainer extends React.Component<{}, ZeroExInstantContainerState> {
+export class ZeroExInstantContainer extends React.Component<ZeroExInstantContainerProps, ZeroExInstantContainerState> {
     public state = {
         tokenSelectionPanelAnimationState: 'none' as SlideAnimationState,
     };
@@ -60,9 +59,9 @@ export class ZeroExInstantContainer extends React.Component<{}, ZeroExInstantCon
                         </Flex>
                         <SlidingPanel
                             animationState={this.state.tokenSelectionPanelAnimationState}
-                            onClose={this._handlePanelClose}
+                            onClose={this._handlePanelCloseClickedX}
                         >
-                            <AvailableERC20TokenSelector onTokenSelect={this._handlePanelClose} />
+                            <AvailableERC20TokenSelector onTokenSelect={this._handlePanelCloseAfterChose} />
                         </SlidingPanel>
                         <CurrentStandardSlidingPanel />
                     </Container>
@@ -82,11 +81,19 @@ export class ZeroExInstantContainer extends React.Component<{}, ZeroExInstantCon
         );
     }
     private readonly _handleSymbolClick = (): void => {
+        analytics.trackTokenSelectorOpened();
         this.setState({
             tokenSelectionPanelAnimationState: 'slidIn',
         });
     };
-    private readonly _handlePanelClose = (): void => {
+    private readonly _handlePanelCloseClickedX = (): void => {
+        this._handlePanelClose(TokenSelectorClosedVia.ClickedX);
+    };
+    private readonly _handlePanelCloseAfterChose = (): void => {
+        this._handlePanelClose(TokenSelectorClosedVia.TokenChose);
+    };
+    private readonly _handlePanelClose = (closedVia: TokenSelectorClosedVia): void => {
+        analytics.trackTokenSelectorClosed(closedVia);
         this.setState({
             tokenSelectionPanelAnimationState: 'slidOut',
         });
diff --git a/packages/instant/src/components/zero_ex_instant_overlay.tsx b/packages/instant/src/components/zero_ex_instant_overlay.tsx
index 2856ea3e3..b3fb57dd6 100644
--- a/packages/instant/src/components/zero_ex_instant_overlay.tsx
+++ b/packages/instant/src/components/zero_ex_instant_overlay.tsx
@@ -1,6 +1,7 @@
 import * as React from 'react';
 
 import { ZeroExInstantContainer } from '../components/zero_ex_instant_container';
+import { MAIN_CONTAINER_DIV_CLASS, OVERLAY_DIV_CLASS } from '../constants';
 import { ColorOption } from '../style/theme';
 
 import { Container } from './ui/container';
@@ -18,7 +19,7 @@ export const ZeroExInstantOverlay: React.StatelessComponent<ZeroExInstantOverlay
     const { onClose, zIndex, ...rest } = props;
     return (
         <ZeroExInstantProvider {...rest}>
-            <Overlay zIndex={zIndex}>
+            <Overlay zIndex={zIndex} className={OVERLAY_DIV_CLASS}>
                 <Flex height="100vh">
                     <Container position="absolute" top="0px" right="0px" display={{ default: 'initial', sm: 'none' }}>
                         <Icon
@@ -30,7 +31,11 @@ export const ZeroExInstantOverlay: React.StatelessComponent<ZeroExInstantOverlay
                             padding="2em 2em"
                         />
                     </Container>
-                    <Container width={{ default: 'auto', sm: '100%' }} height={{ default: 'auto', sm: '100%' }}>
+                    <Container
+                        width={{ default: 'auto', sm: '100%' }}
+                        height={{ default: 'auto', sm: '100%' }}
+                        className={MAIN_CONTAINER_DIV_CLASS}
+                    >
                         <ZeroExInstantContainer />
                     </Container>
                 </Flex>
diff --git a/packages/instant/src/components/zero_ex_instant_provider.tsx b/packages/instant/src/components/zero_ex_instant_provider.tsx
index 1f53f2d96..46488fcc4 100644
--- a/packages/instant/src/components/zero_ex_instant_provider.tsx
+++ b/packages/instant/src/components/zero_ex_instant_provider.tsx
@@ -11,7 +11,7 @@ import { asyncData } from '../redux/async_data';
 import { DEFAULT_STATE, DefaultState, State } from '../redux/reducer';
 import { store, Store } from '../redux/store';
 import { fonts } from '../style/fonts';
-import { AccountState, AffiliateInfo, AssetMetaData, Network, OrderSource } from '../types';
+import { AccountState, AffiliateInfo, AssetMetaData, Network, OrderSource, QuoteFetchOrigin } from '../types';
 import { analytics, disableAnalytics } from '../util/analytics';
 import { assetUtils } from '../util/asset';
 import { errorFlasher } from '../util/error_flasher';
@@ -117,7 +117,9 @@ export class ZeroExInstantProvider extends React.Component<ZeroExInstantProvider
         this._buyQuoteHeartbeat.start(BUY_QUOTE_UPDATE_INTERVAL_TIME_MS);
         // Trigger first buyquote fetch
         // tslint:disable-next-line:no-floating-promises
-        asyncData.fetchCurrentBuyQuoteAndDispatchToStore(state, dispatch, { updateSilently: false });
+        asyncData.fetchCurrentBuyQuoteAndDispatchToStore(state, dispatch, QuoteFetchOrigin.Manual, {
+            updateSilently: false,
+        });
         // warm up the gas price estimator cache just in case we can't
         // grab the gas price estimate when submitting the transaction
         // tslint:disable-next-line:no-floating-promises
@@ -127,14 +129,16 @@ export class ZeroExInstantProvider extends React.Component<ZeroExInstantProvider
 
         // Analytics
         disableAnalytics(this.props.shouldDisableAnalyticsTracking || false);
-        analytics.addEventProperties({
-            embeddedHost: window.location.host,
-            embeddedUrl: window.location.href,
-            networkId: state.network,
-            providerName: state.providerState.name,
-            gitSha: process.env.GIT_SHA,
-            npmVersion: process.env.NPM_PACKAGE_VERSION,
-        });
+        analytics.addEventProperties(
+            analytics.generateEventProperties(
+                state.network,
+                this.props.orderSource,
+                state.providerState,
+                window,
+                state.selectedAsset,
+                this.props.affiliateInfo,
+            ),
+        );
         analytics.trackInstantOpened();
     }
     public componentWillUnmount(): void {
diff --git a/packages/instant/src/constants.ts b/packages/instant/src/constants.ts
index 677510a8b..2fe0f4b89 100644
--- a/packages/instant/src/constants.ts
+++ b/packages/instant/src/constants.ts
@@ -7,6 +7,8 @@ export const ETH_DECIMALS = 18;
 export const DEFAULT_ZERO_EX_CONTAINER_SELECTOR = '#zeroExInstantContainer';
 export const INJECTED_DIV_CLASS = 'zeroExInstantResetRoot';
 export const INJECTED_DIV_ID = 'zeroExInstant';
+export const OVERLAY_DIV_CLASS = 'zeroExInstantOverlay';
+export const MAIN_CONTAINER_DIV_CLASS = 'zeroExInstantMainContainer';
 export const WEB_3_WRAPPER_TRANSACTION_FAILED_ERROR_MSG_PREFIX = 'Transaction failed';
 export const GWEI_IN_WEI = new BigNumber(1000000000);
 export const ONE_SECOND_MS = 1000;
@@ -30,13 +32,12 @@ export const HOST_DOMAINS = [
     'jsdelivr.com',
 ];
 export const ROLLBAR_CLIENT_TOKEN = process.env.ROLLBAR_CLIENT_TOKEN;
-export const INSTANT_ENVIRONMENT = process.env.INSTANT_ENVIRONMENT as
+export const ROLLBAR_ENABLED = process.env.ROLLBAR_ENABLED;
+export const INSTANT_DISCHARGE_TARGET = process.env.INSTANT_DISCHARGE_TARGET as
+    | 'production'
     | 'dogfood'
     | 'staging'
-    | 'development'
-    | 'production'
     | undefined;
-export const ROLLBAR_ENABLED = process.env.ROLLBAR_ENABLED;
 export const COINBASE_WALLET_IOS_APP_STORE_URL = 'https://itunes.apple.com/us/app/coinbase-wallet/id1278383455?mt=8';
 export const COINBASE_WALLET_ANDROID_APP_STORE_URL = 'https://play.google.com/store/apps/details?id=org.toshi&hl=en';
 export const COINBASE_WALLET_SITE_URL = 'https://wallet.coinbase.com/';
diff --git a/packages/instant/src/containers/connected_account_payment_method.ts b/packages/instant/src/containers/connected_account_payment_method.ts
index cdeb49a25..e9327a288 100644
--- a/packages/instant/src/containers/connected_account_payment_method.ts
+++ b/packages/instant/src/containers/connected_account_payment_method.ts
@@ -11,7 +11,7 @@ import {
 import { Action, actions } from '../redux/actions';
 import { asyncData } from '../redux/async_data';
 import { State } from '../redux/reducer';
-import { Network, Omit, OperatingSystem, ProviderState, StandardSlidingPanelContent } from '../types';
+import { Network, Omit, OperatingSystem, ProviderState, StandardSlidingPanelContent, WalletSuggestion } from '../types';
 import { analytics } from '../util/analytics';
 import { envUtil } from '../util/env';
 
@@ -60,23 +60,28 @@ const mergeProps = (
     onUnlockWalletClick: () => connectedDispatch.unlockWalletAndDispatchToStore(connectedState.providerState),
     onInstallWalletClick: () => {
         const isMobile = envUtil.isMobileOperatingSystem();
-        if (!isMobile) {
+        const walletSuggestion: WalletSuggestion = isMobile
+            ? WalletSuggestion.CoinbaseWallet
+            : WalletSuggestion.MetaMask;
+
+        analytics.trackInstallWalletClicked(walletSuggestion);
+        if (walletSuggestion === WalletSuggestion.MetaMask) {
             connectedDispatch.openInstallWalletPanel();
-            return;
-        }
-        const operatingSystem = envUtil.getOperatingSystem();
-        let url = COINBASE_WALLET_SITE_URL;
-        switch (operatingSystem) {
-            case OperatingSystem.Android:
-                url = COINBASE_WALLET_ANDROID_APP_STORE_URL;
-                break;
-            case OperatingSystem.iOS:
-                url = COINBASE_WALLET_IOS_APP_STORE_URL;
-                break;
-            default:
-                break;
+        } else {
+            const operatingSystem = envUtil.getOperatingSystem();
+            let url = COINBASE_WALLET_SITE_URL;
+            switch (operatingSystem) {
+                case OperatingSystem.Android:
+                    url = COINBASE_WALLET_ANDROID_APP_STORE_URL;
+                    break;
+                case OperatingSystem.iOS:
+                    url = COINBASE_WALLET_IOS_APP_STORE_URL;
+                    break;
+                default:
+                    break;
+            }
+            window.open(url, '_blank');
         }
-        window.open(url, '_blank');
     },
 });
 
diff --git a/packages/instant/src/containers/latest_error.tsx b/packages/instant/src/containers/latest_error.tsx
index b7cfdb504..0d4349124 100644
--- a/packages/instant/src/containers/latest_error.tsx
+++ b/packages/instant/src/containers/latest_error.tsx
@@ -4,6 +4,7 @@ import { connect } from 'react-redux';
 import { Dispatch } from 'redux';
 
 import { SlidingError } from '../components/sliding_error';
+import { Container } from '../components/ui/container';
 import { Overlay } from '../components/ui/overlay';
 import { Action } from '../redux/actions';
 import { State } from '../redux/reducer';
@@ -23,7 +24,12 @@ export interface LatestErrorComponentProps {
 
 export const LatestErrorComponent: React.StatelessComponent<LatestErrorComponentProps> = props => {
     if (!props.latestErrorMessage) {
-        return <div />;
+        // Render a hidden SlidingError such that instant does not move when a real error is rendered.
+        return (
+            <Container isHidden={true}>
+                <SlidingError animationState="slidIn" icon="😢" message="" />
+            </Container>
+        );
     }
     return (
         <React.Fragment>
diff --git a/packages/instant/src/containers/selected_erc20_asset_amount_input.ts b/packages/instant/src/containers/selected_erc20_asset_amount_input.ts
index a39bc46a2..cb9df527e 100644
--- a/packages/instant/src/containers/selected_erc20_asset_amount_input.ts
+++ b/packages/instant/src/containers/selected_erc20_asset_amount_input.ts
@@ -10,7 +10,7 @@ import { ERC20AssetAmountInput, ERC20AssetAmountInputProps } from '../components
 import { Action, actions } from '../redux/actions';
 import { State } from '../redux/reducer';
 import { ColorOption } from '../style/theme';
-import { AffiliateInfo, ERC20Asset, Omit, OrderProcessState } from '../types';
+import { AffiliateInfo, ERC20Asset, Omit, OrderProcessState, QuoteFetchOrigin } from '../types';
 import { buyQuoteUpdater } from '../util/buy_quote_updater';
 
 export interface SelectedERC20AssetAmountInputProps {
@@ -88,7 +88,7 @@ const mapDispatchToProps = (
             // even if it's debounced, give them the illusion it's loading
             dispatch(actions.setQuoteRequestStatePending());
             // tslint:disable-next-line:no-floating-promises
-            debouncedUpdateBuyQuoteAsync(assetBuyer, dispatch, asset, value, {
+            debouncedUpdateBuyQuoteAsync(assetBuyer, dispatch, asset, value, QuoteFetchOrigin.Manual, {
                 setPending: true,
                 dispatchErrors: true,
                 affiliateInfo,
diff --git a/packages/instant/src/index.umd.ts b/packages/instant/src/index.umd.ts
index 3a8694d6a..95080f829 100644
--- a/packages/instant/src/index.umd.ts
+++ b/packages/instant/src/index.umd.ts
@@ -110,3 +110,7 @@ export const render = (config: ZeroExInstantConfig, selector: string = DEFAULT_Z
     };
     window.onpopstate = onPopStateHandler;
 };
+
+// Write version info to the exported object for debugging
+export const GIT_SHA = process.env.GIT_SHA;
+export const NPM_VERSION = process.env.NPM_PACKAGE_VERSION;
diff --git a/packages/instant/src/redux/analytics_middleware.ts b/packages/instant/src/redux/analytics_middleware.ts
index 299c2560e..47876ca2d 100644
--- a/packages/instant/src/redux/analytics_middleware.ts
+++ b/packages/instant/src/redux/analytics_middleware.ts
@@ -3,7 +3,7 @@ import * as _ from 'lodash';
 import { Middleware } from 'redux';
 
 import { ETH_DECIMALS } from '../constants';
-import { Account, AccountState } from '../types';
+import { AccountState, StandardSlidingPanelContent } from '../types';
 import { analytics } from '../util/analytics';
 
 import { Action, ActionTypes } from './actions';
@@ -53,6 +53,42 @@ export const analyticsMiddleware: Middleware = store => next => middlewareAction
                 ).toString();
                 analytics.addUserProperties({ ethBalanceInUnitAmount });
             }
+            break;
+        case ActionTypes.UPDATE_SELECTED_ASSET:
+            const selectedAsset = curState.selectedAsset;
+            if (selectedAsset) {
+                const assetName = selectedAsset.metaData.name;
+                const assetData = selectedAsset.assetData;
+                analytics.trackTokenSelectorChose({
+                    assetName,
+                    assetData,
+                });
+                analytics.addEventProperties({
+                    selectedAssetName: assetName,
+                    selectedAssetData: assetData,
+                });
+            }
+            break;
+        case ActionTypes.SET_AVAILABLE_ASSETS:
+            const availableAssets = curState.availableAssets;
+            if (availableAssets) {
+                analytics.addEventProperties({
+                    numberAvailableAssets: availableAssets.length,
+                });
+            }
+            break;
+        case ActionTypes.OPEN_STANDARD_SLIDING_PANEL:
+            const openSlidingContent = curState.standardSlidingPanelSettings.content;
+            if (openSlidingContent === StandardSlidingPanelContent.InstallWallet) {
+                analytics.trackInstallWalletModalOpened();
+            }
+            break;
+        case ActionTypes.CLOSE_STANDARD_SLIDING_PANEL:
+            const closeSlidingContent = curState.standardSlidingPanelSettings.content;
+            if (closeSlidingContent === StandardSlidingPanelContent.InstallWallet) {
+                analytics.trackInstallWalletModalClosed();
+            }
+            break;
     }
 
     return nextAction;
diff --git a/packages/instant/src/redux/async_data.ts b/packages/instant/src/redux/async_data.ts
index 5765a7ca4..18f671cd7 100644
--- a/packages/instant/src/redux/async_data.ts
+++ b/packages/instant/src/redux/async_data.ts
@@ -4,7 +4,7 @@ import * as _ from 'lodash';
 import { Dispatch } from 'redux';
 
 import { BIG_NUMBER_ZERO } from '../constants';
-import { AccountState, ERC20Asset, OrderProcessState, ProviderState } from '../types';
+import { AccountState, ERC20Asset, OrderProcessState, ProviderState, QuoteFetchOrigin } from '../types';
 import { analytics } from '../util/analytics';
 import { assetUtils } from '../util/asset';
 import { buyQuoteUpdater } from '../util/buy_quote_updater';
@@ -88,6 +88,7 @@ export const asyncData = {
     fetchCurrentBuyQuoteAndDispatchToStore: async (
         state: State,
         dispatch: Dispatch,
+        fetchOrigin: QuoteFetchOrigin,
         options: { updateSilently: boolean },
     ) => {
         const { buyOrderState, providerState, selectedAsset, selectedAssetUnitAmount, affiliateInfo } = state;
@@ -103,7 +104,12 @@ export const asyncData = {
                 dispatch,
                 selectedAsset as ERC20Asset,
                 selectedAssetUnitAmount,
-                { setPending: !options.updateSilently, dispatchErrors: !options.updateSilently, affiliateInfo },
+                fetchOrigin,
+                {
+                    setPending: !options.updateSilently,
+                    dispatchErrors: !options.updateSilently,
+                    affiliateInfo,
+                },
             );
         }
     },
diff --git a/packages/instant/src/style/theme.ts b/packages/instant/src/style/theme.ts
index a0751286b..71e4b7052 100644
--- a/packages/instant/src/style/theme.ts
+++ b/packages/instant/src/style/theme.ts
@@ -1,6 +1,14 @@
 import * as styledComponents from 'styled-components';
 
-const { default: styled, css, keyframes, withTheme, createGlobalStyle, ThemeProvider } = styledComponents;
+const {
+    default: styled,
+    css,
+    keyframes,
+    withTheme,
+    createGlobalStyle,
+    ThemeConsumer,
+    ThemeProvider,
+} = styledComponents;
 
 export type Theme = { [key in ColorOption]: string };
 
@@ -45,4 +53,4 @@ export const generateOverlayBlack = (opacity = 0.6) => {
     return `rgba(0, 0, 0, ${opacity})`;
 };
 
-export { styled, css, keyframes, withTheme, createGlobalStyle, ThemeProvider };
+export { styled, css, keyframes, withTheme, createGlobalStyle, ThemeConsumer, ThemeProvider };
diff --git a/packages/instant/src/types.ts b/packages/instant/src/types.ts
index 999d50fed..2d73ba29e 100644
--- a/packages/instant/src/types.ts
+++ b/packages/instant/src/types.ts
@@ -21,6 +21,11 @@ export enum OrderProcessState {
     Failure = 'FAILURE',
 }
 
+export enum QuoteFetchOrigin {
+    Manual = 'Manual',
+    Heartbeat = 'Heartbeat',
+}
+
 export interface SimulatedProgress {
     startTimeUnix: number;
     expectedEndTimeUnix: number;
@@ -149,6 +154,11 @@ export enum Browser {
     Other = 'OTHER',
 }
 
+export enum WalletSuggestion {
+    CoinbaseWallet = 'Coinbase Wallet',
+    MetaMask = 'MetaMask',
+}
+
 export enum OperatingSystem {
     Android = 'ANDROID',
     iOS = 'IOS',
diff --git a/packages/instant/src/util/analytics.ts b/packages/instant/src/util/analytics.ts
index e389e1530..c4a007de6 100644
--- a/packages/instant/src/util/analytics.ts
+++ b/packages/instant/src/util/analytics.ts
@@ -1,3 +1,18 @@
+import { BuyQuote } from '@0x/asset-buyer';
+import { BigNumber } from '@0x/utils';
+import * as _ from 'lodash';
+
+import { INSTANT_DISCHARGE_TARGET } from '../constants';
+import {
+    AffiliateInfo,
+    Asset,
+    Network,
+    OrderSource,
+    ProviderState,
+    QuoteFetchOrigin,
+    WalletSuggestion,
+} from '../types';
+
 import { EventProperties, heapUtil } from './heap';
 
 let isDisabled = false;
@@ -18,7 +33,29 @@ enum EventNames {
     ACCOUNT_UNLOCK_REQUESTED = 'Account - Unlock Requested',
     ACCOUNT_UNLOCK_DENIED = 'Account - Unlock Denied',
     ACCOUNT_ADDRESS_CHANGED = 'Account - Address Changed',
+    PAYMENT_METHOD_DROPDOWN_OPENED = 'Payment Method - Dropdown Opened',
+    PAYMENT_METHOD_OPENED_ETHERSCAN = 'Payment Method - Opened Etherscan',
+    PAYMENT_METHOD_COPIED_ADDRESS = 'Payment Method - Copied Address',
+    BUY_NOT_ENOUGH_ETH = 'Buy - Not Enough Eth',
+    BUY_STARTED = 'Buy - Started',
+    BUY_SIGNATURE_DENIED = 'Buy - Signature Denied',
+    BUY_SIMULATION_FAILED = 'Buy - Simulation Failed',
+    BUY_TX_SUBMITTED = 'Buy - Tx Submitted',
+    BUY_TX_SUCCEEDED = 'Buy - Tx Succeeded',
+    BUY_TX_FAILED = 'Buy - Tx Failed',
+    INSTALL_WALLET_CLICKED = 'Install Wallet - Clicked',
+    INSTALL_WALLET_MODAL_OPENED = 'Install Wallet - Modal - Opened',
+    INSTALL_WALLET_MODAL_CLICKED_EXPLANATION = 'Install Wallet - Modal - Clicked Explanation',
+    INSTALL_WALLET_MODAL_CLICKED_GET = 'Install Wallet - Modal - Clicked Get',
+    INSTALL_WALLET_MODAL_CLOSED = 'Install Wallet - Modal - Closed',
+    TOKEN_SELECTOR_OPENED = 'Token Selector - Opened',
+    TOKEN_SELECTOR_CLOSED = 'Token Selector - Closed',
+    TOKEN_SELECTOR_CHOSE = 'Token Selector - Chose',
+    TOKEN_SELECTOR_SEARCHED = 'Token Selector - Searched',
+    QUOTE_FETCHED = 'Quote - Fetched',
+    QUOTE_ERROR = 'Quote - Error',
 }
+
 const track = (eventName: EventNames, eventProperties: EventProperties = {}): void => {
     evaluateIfEnabled(() => {
         heapUtil.evaluateHeapCall(heap => heap.track(eventName, eventProperties));
@@ -36,6 +73,23 @@ function trackingEventFnWithPayload(eventName: EventNames): (eventProperties: Ev
     };
 }
 
+const buyQuoteEventProperties = (buyQuote: BuyQuote) => {
+    const assetBuyAmount = buyQuote.assetBuyAmount.toString();
+    const assetEthAmount = buyQuote.worstCaseQuoteInfo.assetEthAmount.toString();
+    const feeEthAmount = buyQuote.worstCaseQuoteInfo.feeEthAmount.toString();
+    const totalEthAmount = buyQuote.worstCaseQuoteInfo.totalEthAmount.toString();
+    const feePercentage = !_.isUndefined(buyQuote.feePercentage) ? buyQuote.feePercentage.toString() : 0;
+    const hasFeeOrders = !_.isEmpty(buyQuote.feeOrders) ? 'true' : 'false';
+    return {
+        assetBuyAmount,
+        assetEthAmount,
+        feeEthAmount,
+        totalEthAmount,
+        feePercentage,
+        hasFeeOrders,
+    };
+};
+
 export interface AnalyticsUserOptions {
     lastKnownEthAddress?: string;
     ethBalanceInUnitAmount?: string;
@@ -47,8 +101,18 @@ export interface AnalyticsEventOptions {
     providerName?: string;
     gitSha?: string;
     npmVersion?: string;
+    instantEnvironment?: string;
+    orderSource?: string;
+    affiliateAddress?: string;
+    affiliateFeePercent?: number;
+    numberAvailableAssets?: number;
+    selectedAssetName?: string;
+    selectedAssetData?: string;
+}
+export enum TokenSelectorClosedVia {
+    ClickedX = 'Clicked X',
+    TokenChose = 'Token Chose',
 }
-
 export const analytics = {
     addUserProperties: (properties: AnalyticsUserOptions): void => {
         evaluateIfEnabled(() => {
@@ -60,6 +124,33 @@ export const analytics = {
             heapUtil.evaluateHeapCall(heap => heap.addEventProperties(properties));
         });
     },
+    generateEventProperties: (
+        network: Network,
+        orderSource: OrderSource,
+        providerState: ProviderState,
+        window: Window,
+        selectedAsset?: Asset,
+        affiliateInfo?: AffiliateInfo,
+    ): AnalyticsEventOptions => {
+        const affiliateAddress = affiliateInfo ? affiliateInfo.feeRecipient : 'none';
+        const affiliateFeePercent = affiliateInfo ? parseFloat(affiliateInfo.feePercentage.toFixed(4)) : 0;
+        const orderSourceName = typeof orderSource === 'string' ? orderSource : 'provided';
+        const eventOptions: AnalyticsEventOptions = {
+            embeddedHost: window.location.host,
+            embeddedUrl: window.location.href,
+            networkId: network,
+            providerName: providerState.name,
+            gitSha: process.env.GIT_SHA,
+            npmVersion: process.env.NPM_PACKAGE_VERSION,
+            orderSource: orderSourceName,
+            affiliateAddress,
+            affiliateFeePercent,
+            selectedAssetName: selectedAsset ? selectedAsset.metaData.name : 'none',
+            selectedAssetData: selectedAsset ? selectedAsset.assetData : 'none',
+            instantEnvironment: INSTANT_DISCHARGE_TARGET || `Local ${process.env.NODE_ENV}`,
+        };
+        return eventOptions;
+    },
     trackInstantOpened: trackingEventFnWithoutPayload(EventNames.INSTANT_OPENED),
     trackAccountLocked: trackingEventFnWithoutPayload(EventNames.ACCOUNT_LOCKED),
     trackAccountReady: (address: string) => trackingEventFnWithPayload(EventNames.ACCOUNT_READY)({ address }),
@@ -67,4 +158,62 @@ export const analytics = {
     trackAccountUnlockDenied: trackingEventFnWithoutPayload(EventNames.ACCOUNT_UNLOCK_DENIED),
     trackAccountAddressChanged: (address: string) =>
         trackingEventFnWithPayload(EventNames.ACCOUNT_ADDRESS_CHANGED)({ address }),
+    trackPaymentMethodDropdownOpened: trackingEventFnWithoutPayload(EventNames.PAYMENT_METHOD_DROPDOWN_OPENED),
+    trackPaymentMethodOpenedEtherscan: trackingEventFnWithoutPayload(EventNames.PAYMENT_METHOD_OPENED_ETHERSCAN),
+    trackPaymentMethodCopiedAddress: trackingEventFnWithoutPayload(EventNames.PAYMENT_METHOD_COPIED_ADDRESS),
+    trackBuyNotEnoughEth: (buyQuote: BuyQuote) =>
+        trackingEventFnWithPayload(EventNames.BUY_NOT_ENOUGH_ETH)(buyQuoteEventProperties(buyQuote)),
+    trackBuyStarted: (buyQuote: BuyQuote) =>
+        trackingEventFnWithPayload(EventNames.BUY_STARTED)(buyQuoteEventProperties(buyQuote)),
+    trackBuySignatureDenied: (buyQuote: BuyQuote) =>
+        trackingEventFnWithPayload(EventNames.BUY_SIGNATURE_DENIED)(buyQuoteEventProperties(buyQuote)),
+    trackBuySimulationFailed: (buyQuote: BuyQuote) =>
+        trackingEventFnWithPayload(EventNames.BUY_SIMULATION_FAILED)(buyQuoteEventProperties(buyQuote)),
+    trackBuyTxSubmitted: (buyQuote: BuyQuote, txHash: string, startTimeUnix: number, expectedEndTimeUnix: number) =>
+        trackingEventFnWithPayload(EventNames.BUY_TX_SUBMITTED)({
+            ...buyQuoteEventProperties(buyQuote),
+            txHash,
+            expectedTxTimeMs: expectedEndTimeUnix - startTimeUnix,
+        }),
+    trackBuyTxSucceeded: (buyQuote: BuyQuote, txHash: string, startTimeUnix: number, expectedEndTimeUnix: number) =>
+        trackingEventFnWithPayload(EventNames.BUY_TX_SUCCEEDED)({
+            ...buyQuoteEventProperties(buyQuote),
+            txHash,
+            expectedTxTimeMs: expectedEndTimeUnix - startTimeUnix,
+            actualTxTimeMs: new Date().getTime() - startTimeUnix,
+        }),
+    trackBuyTxFailed: (buyQuote: BuyQuote, txHash: string, startTimeUnix: number, expectedEndTimeUnix: number) =>
+        trackingEventFnWithPayload(EventNames.BUY_TX_FAILED)({
+            ...buyQuoteEventProperties(buyQuote),
+            txHash,
+            expectedTxTimeMs: expectedEndTimeUnix - startTimeUnix,
+            actualTxTimeMs: new Date().getTime() - startTimeUnix,
+        }),
+    trackInstallWalletClicked: (walletSuggestion: WalletSuggestion) =>
+        trackingEventFnWithPayload(EventNames.INSTALL_WALLET_CLICKED)({ walletSuggestion }),
+    trackInstallWalletModalClickedExplanation: trackingEventFnWithoutPayload(
+        EventNames.INSTALL_WALLET_MODAL_CLICKED_EXPLANATION,
+    ),
+    trackInstallWalletModalClickedGet: trackingEventFnWithoutPayload(EventNames.INSTALL_WALLET_MODAL_CLICKED_GET),
+    trackInstallWalletModalOpened: trackingEventFnWithoutPayload(EventNames.INSTALL_WALLET_MODAL_OPENED),
+    trackInstallWalletModalClosed: trackingEventFnWithoutPayload(EventNames.INSTALL_WALLET_MODAL_CLOSED),
+    trackTokenSelectorOpened: trackingEventFnWithoutPayload(EventNames.TOKEN_SELECTOR_OPENED),
+    trackTokenSelectorClosed: (closedVia: TokenSelectorClosedVia) =>
+        trackingEventFnWithPayload(EventNames.TOKEN_SELECTOR_CLOSED)({ closedVia }),
+    trackTokenSelectorChose: (payload: { assetName: string; assetData: string }) =>
+        trackingEventFnWithPayload(EventNames.TOKEN_SELECTOR_CHOSE)(payload),
+    trackTokenSelectorSearched: (searchText: string) =>
+        trackingEventFnWithPayload(EventNames.TOKEN_SELECTOR_SEARCHED)({ searchText }),
+    trackQuoteFetched: (buyQuote: BuyQuote, fetchOrigin: QuoteFetchOrigin) =>
+        trackingEventFnWithPayload(EventNames.QUOTE_FETCHED)({
+            ...buyQuoteEventProperties(buyQuote),
+            fetchOrigin,
+        }),
+    trackQuoteError: (errorMessage: string, assetBuyAmount: BigNumber, fetchOrigin: QuoteFetchOrigin) => {
+        trackingEventFnWithPayload(EventNames.QUOTE_ERROR)({
+            errorMessage,
+            assetBuyAmount: assetBuyAmount.toString(),
+            fetchOrigin,
+        });
+    },
 };
diff --git a/packages/instant/src/util/buy_quote_updater.ts b/packages/instant/src/util/buy_quote_updater.ts
index 172b50d2a..4229f2735 100644
--- a/packages/instant/src/util/buy_quote_updater.ts
+++ b/packages/instant/src/util/buy_quote_updater.ts
@@ -6,7 +6,8 @@ import { Dispatch } from 'redux';
 import { oc } from 'ts-optchain';
 
 import { Action, actions } from '../redux/actions';
-import { AffiliateInfo, ERC20Asset } from '../types';
+import { AffiliateInfo, ERC20Asset, QuoteFetchOrigin } from '../types';
+import { analytics } from '../util/analytics';
 import { assetUtils } from '../util/asset';
 import { errorFlasher } from '../util/error_flasher';
 import { errorReporter } from '../util/error_reporter';
@@ -17,7 +18,12 @@ export const buyQuoteUpdater = {
         dispatch: Dispatch<Action>,
         asset: ERC20Asset,
         assetUnitAmount: BigNumber,
-        options: { setPending: boolean; dispatchErrors: boolean; affiliateInfo?: AffiliateInfo },
+        fetchOrigin: QuoteFetchOrigin,
+        options: {
+            setPending: boolean;
+            dispatchErrors: boolean;
+            affiliateInfo?: AffiliateInfo;
+        },
     ): Promise<void> => {
         // get a new buy quote.
         const baseUnitValue = Web3Wrapper.toBaseUnitAmount(assetUnitAmount, asset.metaData.decimals);
@@ -39,6 +45,7 @@ export const buyQuoteUpdater = {
 
             if (options.dispatchErrors) {
                 dispatch(actions.setQuoteRequestStateFailure());
+                analytics.trackQuoteError(error.message ? error.message : 'other', baseUnitValue, fetchOrigin);
                 errorFlasher.flashNewErrorMessage(dispatch, errorMessage || 'Error fetching price, please try again');
             }
             return;
@@ -47,5 +54,6 @@ export const buyQuoteUpdater = {
         errorFlasher.clearError(dispatch);
         // invalidate the last buy quote.
         dispatch(actions.updateLatestBuyQuote(newBuyQuote));
+        analytics.trackQuoteFetched(newBuyQuote, fetchOrigin);
     },
 };
diff --git a/packages/instant/src/util/error_reporter.ts b/packages/instant/src/util/error_reporter.ts
index 8e21c8881..3ec7b6daa 100644
--- a/packages/instant/src/util/error_reporter.ts
+++ b/packages/instant/src/util/error_reporter.ts
@@ -1,7 +1,7 @@
 import { logUtils } from '@0x/utils';
 import * as _ from 'lodash';
 
-import { HOST_DOMAINS, INSTANT_ENVIRONMENT, ROLLBAR_CLIENT_TOKEN, ROLLBAR_ENABLED } from '../constants';
+import { HOST_DOMAINS, INSTANT_DISCHARGE_TARGET, ROLLBAR_CLIENT_TOKEN, ROLLBAR_ENABLED } from '../constants';
 
 // Import version of Rollbar designed for embedded components
 // See https://docs.rollbar.com/docs/using-rollbarjs-inside-an-embedded-component
@@ -11,7 +11,7 @@ const Rollbar = require('rollbar/dist/rollbar.noconflict.umd');
 let rollbar: any;
 // Configures rollbar and sets up error catching
 export const setupRollbar = (): any => {
-    if (_.isUndefined(rollbar) && ROLLBAR_CLIENT_TOKEN && INSTANT_ENVIRONMENT && ROLLBAR_ENABLED) {
+    if (_.isUndefined(rollbar) && ROLLBAR_CLIENT_TOKEN && ROLLBAR_ENABLED) {
         rollbar = new Rollbar({
             accessToken: ROLLBAR_CLIENT_TOKEN,
             captureUncaught: true,
@@ -20,7 +20,7 @@ export const setupRollbar = (): any => {
             itemsPerMinute: 10,
             maxItems: 500,
             payload: {
-                environment: INSTANT_ENVIRONMENT,
+                environment: INSTANT_DISCHARGE_TARGET || `Local ${process.env.NODE_ENV}`,
                 client: {
                     javascript: {
                         source_map_enabled: true,
diff --git a/packages/instant/src/util/heartbeater_factory.ts b/packages/instant/src/util/heartbeater_factory.ts
index 2b852fb0d..cf29bf3ea 100644
--- a/packages/instant/src/util/heartbeater_factory.ts
+++ b/packages/instant/src/util/heartbeater_factory.ts
@@ -1,5 +1,6 @@
 import { asyncData } from '../redux/async_data';
 import { Store } from '../redux/store';
+import { QuoteFetchOrigin } from '../types';
 
 import { Heartbeater } from './heartbeater';
 
@@ -17,8 +18,13 @@ export const generateAccountHeartbeater = (options: HeartbeatFactoryOptions): He
 export const generateBuyQuoteHeartbeater = (options: HeartbeatFactoryOptions): Heartbeater => {
     const { store, shouldPerformImmediatelyOnStart } = options;
     return new Heartbeater(async () => {
-        await asyncData.fetchCurrentBuyQuoteAndDispatchToStore(store.getState(), store.dispatch, {
-            updateSilently: true,
-        });
+        await asyncData.fetchCurrentBuyQuoteAndDispatchToStore(
+            store.getState(),
+            store.dispatch,
+            QuoteFetchOrigin.Heartbeat,
+            {
+                updateSilently: true,
+            },
+        );
     }, shouldPerformImmediatelyOnStart);
 };
diff --git a/packages/instant/tsconfig.json b/packages/instant/tsconfig.json
index 14b0ad8f7..2b3c11c9f 100644
--- a/packages/instant/tsconfig.json
+++ b/packages/instant/tsconfig.json
@@ -5,8 +5,10 @@
         "rootDir": "src",
         "jsx": "react",
         "noImplicitAny": true,
-        "allowSyntheticDefaultImports": true
+        "allowSyntheticDefaultImports": true,
+        "declaration": false,
+        "declarationMap": false,
+        "composite": false
     },
-    "include": ["./src/**/*"],
-    "exclude": ["./src/index.umd.ts"]
+    "include": ["./src/**/*"]
 }
diff --git a/packages/instant/webpack.config.js b/packages/instant/webpack.config.js
index 7149793c4..60c07db61 100644
--- a/packages/instant/webpack.config.js
+++ b/packages/instant/webpack.config.js
@@ -4,111 +4,113 @@ const path = require('path');
 const RollbarSourceMapPlugin = require('rollbar-sourcemap-webpack-plugin');
 const webpack = require('webpack');
 
-// The common js bundle (not this one) is built using tsc.
-// The umd bundle (this one) has a different entrypoint.
-
 const GIT_SHA = childProcess
     .execSync('git rev-parse HEAD')
     .toString()
     .trim();
 
-const getEnvironmentName = (env, argv) => {
-    if (env && env.dogfood) {
-        return 'dogfood';
-    } else if (env && env.staging) {
-        return 'staging';
-    }
-
-    // argv.mode should be 'development' or 'production'
-    return argv.mode;
+const DISCHARGE_TARGETS_THAT_REQUIRED_HEAP = ['production', 'staging', 'dogfood'];
+const getHeapConfigForDischargeTarget = dischargeTarget => {
+    return {
+        heapAnalyticsIdEnvName:
+            dischargeTarget === 'production'
+                ? 'INSTANT_HEAP_ANALYTICS_ID_PRODUCTION'
+                : 'INSTANT_HEAP_ANALYTICS_ID_DEVELOPMENT',
+        heapAnalyticsIdRequired: DISCHARGE_TARGETS_THAT_REQUIRED_HEAP.includes(dischargeTarget),
+    };
 };
 
-const getHeapAnalyticsId = environmentName => {
-    if (environmentName === 'production') {
-        return process.env['INSTANT_HEAP_ANALYTICS_ID_PRODUCTION'];
+const DISCHARGE_TARGETS_THAT_REQUIRE = ['production', 'staging', 'dogfood'];
+const getRollbarConfigForDischargeTarget = dischargeTarget => {
+    if (DISCHARGE_TARGETS_THAT_REQUIRE.includes(dischargeTarget)) {
+        const rollbarSourceMapPublicPath =
+            dischargeTarget === 'production'
+                ? 'https://instant.0xproject.com'
+                : `http://0x-instant-${dischargeTarget}.s3-website-us-east-1.amazonaws.com`;
+
+        return {
+            rollbarSourceMapPublicPath,
+            rollbarRequired: true,
+        };
     }
 
-    if (environmentName === 'development' || environmentName === 'dogfood' || environmentName === 'staging') {
-        return process.env['INSTANT_HEAP_ANALYTICS_ID_DEVELOPMENT'];
-    }
-
-    return undefined;
+    return {
+        rollbarRequired: false,
+    };
 };
 
-const ROLLBAR_PUBLISH_TOKEN_ENV_NAME = 'INSTANT_ROLLBAR_PUBLISH_TOKEN';
-const ROLLBAR_CLIENT_TOKEN_ENV_NAME = 'INSTANT_ROLLBAR_CLIENT_TOKEN';
-const getRollbarSourceMapPlugin = environmentName => {
-    if (!environmentName) {
-        return undefined;
+const ROLLBAR_CLIENT_TOKEN_ENV_VAR_NAME = 'INSTANT_ROLLBAR_CLIENT_TOKEN';
+const ROLLBAR_PUBLISH_TOKEN_ENV_VAR_NAME = 'INSTANT_ROLLBAR_PUBLISH_TOKEN';
+const getRollbarTokens = (dischargeTarget, rollbarRequired) => {
+    const clientToken = process.env[ROLLBAR_CLIENT_TOKEN_ENV_VAR_NAME];
+    const publishToken = process.env[ROLLBAR_PUBLISH_TOKEN_ENV_VAR_NAME];
+
+    if (rollbarRequired) {
+        if (!clientToken) {
+            throw new Error(
+                `Rollbar client token required for ${dischargeTarget}, please set env var ${ROLLBAR_CLIENT_TOKEN_ENV_VAR_NAME}`,
+            );
+        }
+        if (!publishToken) {
+            throw new Error(
+                `Rollbar publish token required for ${dischargeTarget}, please set env var ${ROLLBAR_PUBLISH_TOKEN_ENV_VAR_NAME}`,
+            );
+        }
     }
 
-    const publishToken = process.env[ROLLBAR_PUBLISH_TOKEN_ENV_NAME];
-    if (!publishToken) {
-        return undefined;
-    }
-
-    let rollbarPublicPath;
-    if (environmentName === 'dogfood') {
-        rollbarPublicPath = 'http://0x-instant-dogfood.s3-website-us-east-1.amazonaws.com';
-    } else if (environmentName === 'staging') {
-        rollbarPublicPath = 'http://0x-instant-staging.s3-website-us-east-1.amazonaws.com';
-    } // TODO(sk): When we decide on JS cdn, add public path here
+    return { clientToken, publishToken };
+};
 
-    if (!rollbarPublicPath) {
-        console.log('No rollbar public path');
-        return undefined;
-    }
+const generateConfig = (dischargeTarget, heapConfigOptions, rollbarConfigOptions, nodeEnv) => {
+    const outputPath = process.env.WEBPACK_OUTPUT_PATH || 'umd';
 
-    const rollbarPluginOptions = {
-        accessToken: publishToken,
-        version: GIT_SHA,
-        publicPath: rollbarPublicPath,
-    };
-    return new RollbarSourceMapPlugin(rollbarPluginOptions);
-};
-const validateRollbarPresence = (environmentName, rollbarEnabled, rollbarSourceMapPlugin) => {
-    const requiresRollbar = environmentName === 'dogfood' || environmentName === 'staging';
-    if (!requiresRollbar) {
-        return;
-    }
-    if (!rollbarEnabled || !rollbarSourceMapPlugin) {
+    const { heapAnalyticsIdEnvName, heapAnalyticsIdRequired } = heapConfigOptions;
+    const heapAnalyticsId = process.env[heapAnalyticsIdEnvName];
+    if (heapAnalyticsIdRequired && !heapAnalyticsId) {
         throw new Error(
-            `Rollbar env vars must be set to build for ${environmentName}. Please set ${ROLLBAR_CLIENT_TOKEN_ENV_NAME} to a rollbar access token with post_client_item permissions, and ${ROLLBAR_PUBLISH_TOKEN_ENV_NAME} to a rollbar access token with post_server_item permissions.`,
+            `Must define heap analytics id in ENV var ${heapAnalyticsIdEnvName} when building for ${dischargeTarget}`,
         );
     }
-};
 
-module.exports = (env, argv) => {
-    const environmentName = getEnvironmentName(env, argv);
-    const outputPath = process.env.WEBPACK_OUTPUT_PATH || 'umd';
+    const rollbarTokens = getRollbarTokens(dischargeTarget, rollbarConfigOptions.rollbarRequired);
+    const rollbarEnabled =
+        rollbarTokens.clientToken && (nodeEnv !== 'development' || process.env.INSTANT_ROLLBAR_FORCE_DEVELOPMENT);
+
+    let rollbarPlugin;
+    if (rollbarConfigOptions.rollbarRequired) {
+        if (!rollbarEnabled || !rollbarTokens.publishToken || !rollbarConfigOptions.rollbarSourceMapPublicPath) {
+            throw new Error(`Rollbar required for ${dischargeTarget} but not configured`);
+        }
+        rollbarPlugin = new RollbarSourceMapPlugin({
+            accessToken: rollbarTokens.publishToken,
+            version: GIT_SHA,
+            publicPath: rollbarConfigOptions.rollbarSourceMapPublicPath,
+        });
+    }
 
     const envVars = {
         GIT_SHA: JSON.stringify(GIT_SHA),
         NPM_PACKAGE_VERSION: JSON.stringify(process.env.npm_package_version),
-        HEAP_ANALYTICS_ID: getHeapAnalyticsId(environmentName),
-        INSTANT_ENVIRONMENT: JSON.stringify(environmentName),
-        ROLLBAR_CLIENT_TOKEN: JSON.stringify(process.env[ROLLBAR_CLIENT_TOKEN_ENV_NAME]),
+        ROLLBAR_ENABLED: rollbarEnabled,
     };
-
-    const canRollbarBeEnabled =
-        environmentName === 'development' ? process.env.INSTANT_ROLLBAR_FORCE_DEVELOPMENT_REPORT : true;
-    if (envVars.INSTANT_ENVIRONMENT && envVars.ROLLBAR_CLIENT_TOKEN && canRollbarBeEnabled) {
-        envVars['ROLLBAR_ENABLED'] = JSON.stringify(true);
+    if (dischargeTarget) {
+        envVars.INSTANT_DISCHARGE_TARGET = JSON.stringify(dischargeTarget);
+    }
+    if (heapAnalyticsId) {
+        envVars.HEAP_ANALYTICS_ID = JSON.stringify(heapAnalyticsId);
+    }
+    if (rollbarTokens.clientToken) {
+        envVars.ROLLBAR_CLIENT_TOKEN = JSON.stringify(rollbarTokens.clientToken);
     }
 
-    let plugins = [
+    const plugins = [
         new webpack.DefinePlugin({
             'process.env': envVars,
         }),
     ];
-    const rollbarSourceMapPlugin = getRollbarSourceMapPlugin(environmentName);
-    if (rollbarSourceMapPlugin) {
-        console.log('Using rollbar source map plugin');
-        plugins = plugins.concat(rollbarSourceMapPlugin);
-    } else {
-        console.log('Not using rollbar source map plugin');
+    if (rollbarPlugin) {
+        plugins.push(rollbarPlugin);
     }
-    validateRollbarPresence(environmentName, envVars['ROLLBAR_ENABLED'], rollbarSourceMapPlugin);
 
     const config = {
         entry: {
@@ -163,3 +165,10 @@ module.exports = (env, argv) => {
     };
     return config;
 };
+
+module.exports = (env, argv) => {
+    const dischargeTarget = env ? env.discharge_target : undefined;
+    const heapConfigOptions = getHeapConfigForDischargeTarget(dischargeTarget);
+    const rollbarConfigOptions = getRollbarConfigForDischargeTarget(dischargeTarget);
+    return generateConfig(dischargeTarget, heapConfigOptions, rollbarConfigOptions, argv.mode);
+};
diff --git a/packages/metacoin/package.json b/packages/metacoin/package.json
index 332fbb466..7622fa5d4 100644
--- a/packages/metacoin/package.json
+++ b/packages/metacoin/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/metacoin",
-    "version": "0.0.29",
+    "version": "0.0.30",
     "engines": {
         "node": ">=6.12"
     },
@@ -30,15 +30,15 @@
     "license": "Apache-2.0",
     "dependencies": {
         "@0x/abi-gen": "^1.0.17",
-        "@0x/abi-gen-templates": "^1.0.0",
-        "@0x/base-contract": "^3.0.7",
-        "@0x/sol-cov": "^2.1.13",
-        "@0x/subproviders": "^2.1.5",
+        "@0x/abi-gen-templates": "^1.0.1",
+        "@0x/base-contract": "^3.0.8",
+        "@0x/sol-cov": "^2.1.14",
+        "@0x/subproviders": "^2.1.6",
         "@0x/tslint-config": "^1.0.10",
         "@0x/types": "^1.3.0",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "@types/mocha": "^5.2.2",
         "copyfiles": "^2.0.0",
         "ethereum-types": "^1.1.2",
@@ -47,8 +47,8 @@
         "run-s": "^0.0.0"
     },
     "devDependencies": {
-        "@0x/dev-utils": "^1.0.18",
-        "@0x/sol-compiler": "^1.1.13",
+        "@0x/dev-utils": "^1.0.19",
+        "@0x/sol-compiler": "^1.1.14",
         "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 07031fc09..56705fc1a 100644
--- a/packages/migrations/CHANGELOG.json
+++ b/packages/migrations/CHANGELOG.json
@@ -14,7 +14,8 @@
                 "note": "Fund the Forwarder with ZRX for fees.",
                 "pr": 1309
             }
-        ]
+        ],
+        "timestamp": 1543401373
     },
     {
         "version": "2.1.0",
diff --git a/packages/migrations/CHANGELOG.md b/packages/migrations/CHANGELOG.md
index 986e224b0..3808b2d3d 100644
--- a/packages/migrations/CHANGELOG.md
+++ b/packages/migrations/CHANGELOG.md
@@ -5,6 +5,12 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v2.2.0 - _November 28, 2018_
+
+    * Add CLI `0x-migrate` for running the 0x migrations in a language-agnostic way (#1324)
+    * Deploy testnet Exchange arfitact. Previously mainnet Exchange artifact was deployed. (#1309)
+    * Fund the Forwarder with ZRX for fees. (#1309)
+
 ## v2.1.0 - _November 21, 2018_
 
     * Export all type declarations used by the public interface, as well as the `ContractAddresses` mapping (#1301)
diff --git a/packages/migrations/package.json b/packages/migrations/package.json
index b006a470a..f4dd1f9f9 100644
--- a/packages/migrations/package.json
+++ b/packages/migrations/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/migrations",
-    "version": "2.1.0",
+    "version": "2.2.0",
     "engines": {
         "node": ">=6.12"
     },
@@ -26,7 +26,7 @@
     },
     "license": "Apache-2.0",
     "devDependencies": {
-        "@0x/dev-utils": "^1.0.18",
+        "@0x/dev-utils": "^1.0.19",
         "@0x/tslint-config": "^1.0.10",
         "@0x/types": "^1.3.0",
         "@types/yargs": "^10.0.0",
@@ -39,16 +39,16 @@
         "yargs": "^10.0.3"
     },
     "dependencies": {
-        "@0x/abi-gen-wrappers": "^1.1.0",
-        "@0x/base-contract": "^3.0.7",
-        "@0x/contract-addresses": "^1.2.0",
-        "@0x/contract-artifacts": "^1.1.0",
-        "@0x/order-utils": "^3.0.3",
-        "@0x/sol-compiler": "^1.1.13",
-        "@0x/subproviders": "^2.1.5",
+        "@0x/abi-gen-wrappers": "^2.0.0",
+        "@0x/base-contract": "^3.0.8",
+        "@0x/contract-addresses": "^2.0.0",
+        "@0x/contract-artifacts": "^1.1.2",
+        "@0x/order-utils": "^3.0.4",
+        "@0x/sol-compiler": "^1.1.14",
+        "@0x/subproviders": "^2.1.6",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "@ledgerhq/hw-app-eth": "^4.3.0",
         "ethereum-types": "^1.1.2",
         "ethers": "~4.0.4",
diff --git a/packages/monorepo-scripts/src/prepublish_checks.ts b/packages/monorepo-scripts/src/prepublish_checks.ts
index 5fe1aacf2..36e61714b 100644
--- a/packages/monorepo-scripts/src/prepublish_checks.ts
+++ b/packages/monorepo-scripts/src/prepublish_checks.ts
@@ -17,7 +17,6 @@ async function prepublishChecksAsync(): Promise<void> {
     await checkChangelogFormatAsync(updatedPublicPackages);
     await checkGitTagsForNextVersionAndDeleteIfExistAsync(updatedPublicPackages);
     await checkPublishRequiredSetupAsync();
-    checkRequiredEnvVariables();
 }
 
 async function checkGitTagsForNextVersionAndDeleteIfExistAsync(updatedPublicPackages: Package[]): Promise<void> {
@@ -184,20 +183,6 @@ async function checkPublishRequiredSetupAsync(): Promise<void> {
     }
 }
 
-const checkRequiredEnvVariables = () => {
-    utils.log('Checking required environment variables...');
-    const requiredEnvVars = [
-        'INSTANT_HEAP_ANALYTICS_ID_PRODUCTION',
-        'INSTANT_ROLLBAR_CLIENT_TOKEN',
-        'INSTANT_ROLLBAR_PUBLISH_TOKEN',
-    ];
-    requiredEnvVars.forEach(requiredEnvVarName => {
-        if (_.isUndefined(process.env[requiredEnvVarName])) {
-            throw new Error(`Must have ${requiredEnvVarName} set`);
-        }
-    });
-};
-
 prepublishChecksAsync().catch(err => {
     utils.log(err);
     process.exit(1);
diff --git a/packages/order-utils/CHANGELOG.json b/packages/order-utils/CHANGELOG.json
index a4f5dc622..6c8fd6239 100644
--- a/packages/order-utils/CHANGELOG.json
+++ b/packages/order-utils/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "3.0.4",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1542821676,
         "version": "3.0.3",
         "changes": [
diff --git a/packages/order-utils/CHANGELOG.md b/packages/order-utils/CHANGELOG.md
index b863cbc03..5eae590b5 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
 
+## v3.0.4 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v3.0.3 - _November 21, 2018_
 
     * Dependencies updated
diff --git a/packages/order-utils/package.json b/packages/order-utils/package.json
index e032d6e7d..50229dafb 100644
--- a/packages/order-utils/package.json
+++ b/packages/order-utils/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/order-utils",
-    "version": "3.0.3",
+    "version": "3.0.4",
     "engines": {
         "node": ">=6.12"
     },
@@ -35,7 +35,7 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/order-utils/README.md",
     "devDependencies": {
-        "@0x/dev-utils": "^1.0.18",
+        "@0x/dev-utils": "^1.0.19",
         "@0x/tslint-config": "^1.0.10",
         "@types/bn.js": "^4.11.0",
         "@types/lodash": "4.14.104",
@@ -53,15 +53,15 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/abi-gen-wrappers": "^1.1.0",
+        "@0x/abi-gen-wrappers": "^2.0.0",
         "@0x/assert": "^1.0.18",
-        "@0x/base-contract": "^3.0.7",
-        "@0x/contract-artifacts": "^1.1.0",
+        "@0x/base-contract": "^3.0.8",
+        "@0x/contract-artifacts": "^1.1.2",
         "@0x/json-schemas": "^2.1.2",
         "@0x/types": "^1.3.0",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "@types/node": "*",
         "bn.js": "^4.11.8",
         "ethereum-types": "^1.1.2",
diff --git a/packages/order-watcher/CHANGELOG.json b/packages/order-watcher/CHANGELOG.json
index ca2de9831..4e56dc400 100644
--- a/packages/order-watcher/CHANGELOG.json
+++ b/packages/order-watcher/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "2.2.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1542821676,
         "version": "2.2.5",
         "changes": [
diff --git a/packages/order-watcher/CHANGELOG.md b/packages/order-watcher/CHANGELOG.md
index 7ae47fdda..37b4a7438 100644
--- a/packages/order-watcher/CHANGELOG.md
+++ b/packages/order-watcher/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v2.2.6 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v2.2.5 - _November 21, 2018_
 
     * Dependencies updated
diff --git a/packages/order-watcher/package.json b/packages/order-watcher/package.json
index 4257bd2a8..9a51203f4 100644
--- a/packages/order-watcher/package.json
+++ b/packages/order-watcher/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/order-watcher",
-    "version": "2.2.5",
+    "version": "2.2.6",
     "description": "An order watcher daemon that watches for order validity",
     "keywords": [
         "0x",
@@ -33,8 +33,8 @@
         "node": ">=6.0.0"
     },
     "devDependencies": {
-        "@0x/dev-utils": "^1.0.18",
-        "@0x/migrations": "^2.1.0",
+        "@0x/dev-utils": "^1.0.19",
+        "@0x/migrations": "^2.2.0",
         "@0x/tslint-config": "^1.0.10",
         "@types/bintrees": "^1.0.2",
         "@types/lodash": "4.14.104",
@@ -57,19 +57,19 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/abi-gen-wrappers": "^1.1.0",
+        "@0x/abi-gen-wrappers": "^2.0.0",
         "@0x/assert": "^1.0.18",
-        "@0x/base-contract": "^3.0.7",
-        "@0x/contract-addresses": "^1.2.0",
-        "@0x/contract-artifacts": "^1.1.0",
-        "@0x/contract-wrappers": "^4.1.0",
-        "@0x/fill-scenarios": "^1.0.13",
+        "@0x/base-contract": "^3.0.8",
+        "@0x/contract-addresses": "^2.0.0",
+        "@0x/contract-artifacts": "^1.1.2",
+        "@0x/contract-wrappers": "^4.1.1",
+        "@0x/fill-scenarios": "^1.0.14",
         "@0x/json-schemas": "^2.1.2",
-        "@0x/order-utils": "^3.0.3",
+        "@0x/order-utils": "^3.0.4",
         "@0x/types": "^1.3.0",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "bintrees": "^1.0.2",
         "ethereum-types": "^1.1.2",
         "ethereumjs-blockstream": "6.0.0",
diff --git a/packages/react-docs/CHANGELOG.json b/packages/react-docs/CHANGELOG.json
index cecc270eb..d456a3b53 100644
--- a/packages/react-docs/CHANGELOG.json
+++ b/packages/react-docs/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "1.0.20",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1542821676,
         "version": "1.0.19",
         "changes": [
diff --git a/packages/react-docs/CHANGELOG.md b/packages/react-docs/CHANGELOG.md
index f0a56191d..e48f43fb8 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
 
+## v1.0.20 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v1.0.19 - _November 21, 2018_
 
     * Dependencies updated
diff --git a/packages/react-docs/package.json b/packages/react-docs/package.json
index 6e819ee72..968ac4e34 100644
--- a/packages/react-docs/package.json
+++ b/packages/react-docs/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/react-docs",
-    "version": "1.0.19",
+    "version": "1.0.20",
     "engines": {
         "node": ">=6.12"
     },
@@ -24,7 +24,7 @@
         "url": "https://github.com/0xProject/0x-monorepo.git"
     },
     "devDependencies": {
-        "@0x/dev-utils": "^1.0.18",
+        "@0x/dev-utils": "^1.0.19",
         "@0x/tslint-config": "^1.0.10",
         "@types/compare-versions": "^3.0.0",
         "@types/styled-components": "^4.0.0",
@@ -34,7 +34,7 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/react-shared": "^1.0.22",
+        "@0x/react-shared": "^1.0.23",
         "@0x/types": "^1.3.0",
         "@0x/utils": "^2.0.6",
         "@types/lodash": "4.14.104",
diff --git a/packages/react-shared/CHANGELOG.json b/packages/react-shared/CHANGELOG.json
index bcbf2d9f9..a376bae29 100644
--- a/packages/react-shared/CHANGELOG.json
+++ b/packages/react-shared/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "1.0.23",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1542821676,
         "version": "1.0.22",
         "changes": [
diff --git a/packages/react-shared/CHANGELOG.md b/packages/react-shared/CHANGELOG.md
index c6fb9e479..a983e0af2 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
 
+## v1.0.23 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v1.0.22 - _November 21, 2018_
 
     * Dependencies updated
diff --git a/packages/react-shared/package.json b/packages/react-shared/package.json
index 34412e14e..b5816ad98 100644
--- a/packages/react-shared/package.json
+++ b/packages/react-shared/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/react-shared",
-    "version": "1.0.22",
+    "version": "1.0.23",
     "engines": {
         "node": ">=6.12"
     },
@@ -25,7 +25,7 @@
         "url": "https://github.com/0xProject/0x-monorepo.git"
     },
     "devDependencies": {
-        "@0x/dev-utils": "^1.0.18",
+        "@0x/dev-utils": "^1.0.19",
         "@0x/tslint-config": "^1.0.10",
         "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 2ca983c59..e9274f64e 100644
--- a/packages/sol-compiler/CHANGELOG.json
+++ b/packages/sol-compiler/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "1.1.14",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1542821676,
         "version": "1.1.13",
         "changes": [
diff --git a/packages/sol-compiler/CHANGELOG.md b/packages/sol-compiler/CHANGELOG.md
index e535df64e..a1782bb3b 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
 
+## v1.1.14 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v1.1.13 - _November 21, 2018_
 
     * Dependencies updated
diff --git a/packages/sol-compiler/package.json b/packages/sol-compiler/package.json
index bcc235866..d27c0ee31 100644
--- a/packages/sol-compiler/package.json
+++ b/packages/sol-compiler/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/sol-compiler",
-    "version": "1.1.13",
+    "version": "1.1.14",
     "engines": {
         "node": ">=6.12"
     },
@@ -42,7 +42,7 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/sol-compiler/README.md",
     "devDependencies": {
-        "@0x/dev-utils": "^1.0.18",
+        "@0x/dev-utils": "^1.0.19",
         "@0x/tslint-config": "^1.0.10",
         "@types/mkdirp": "^0.5.2",
         "@types/require-from-string": "^1.2.0",
@@ -71,7 +71,7 @@
         "@0x/types": "^1.3.0",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "@types/yargs": "^11.0.0",
         "chalk": "^2.3.0",
         "ethereum-types": "^1.1.2",
diff --git a/packages/sol-cov/CHANGELOG.json b/packages/sol-cov/CHANGELOG.json
index 3dd04be8c..bc8aa71e1 100644
--- a/packages/sol-cov/CHANGELOG.json
+++ b/packages/sol-cov/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "2.1.14",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1542821676,
         "version": "2.1.13",
         "changes": [
diff --git a/packages/sol-cov/CHANGELOG.md b/packages/sol-cov/CHANGELOG.md
index e56a1393e..25ba93026 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
 
+## v2.1.14 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v2.1.13 - _November 21, 2018_
 
     * Dependencies updated
diff --git a/packages/sol-cov/package.json b/packages/sol-cov/package.json
index 9dcb3b854..73c11980f 100644
--- a/packages/sol-cov/package.json
+++ b/packages/sol-cov/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/sol-cov",
-    "version": "2.1.13",
+    "version": "2.1.14",
     "engines": {
         "node": ">=6.12"
     },
@@ -42,12 +42,12 @@
     },
     "homepage": "https://github.com/0xProject/0x.js/packages/sol-cov/README.md",
     "dependencies": {
-        "@0x/dev-utils": "^1.0.18",
-        "@0x/sol-compiler": "^1.1.13",
-        "@0x/subproviders": "^2.1.5",
+        "@0x/dev-utils": "^1.0.19",
+        "@0x/sol-compiler": "^1.1.14",
+        "@0x/subproviders": "^2.1.6",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "@types/solidity-parser-antlr": "^0.2.0",
         "ethereum-types": "^1.1.2",
         "ethereumjs-util": "^5.1.1",
diff --git a/packages/sol-doc/CHANGELOG.json b/packages/sol-doc/CHANGELOG.json
index c3dcc81f1..332aeb025 100644
--- a/packages/sol-doc/CHANGELOG.json
+++ b/packages/sol-doc/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "1.0.9",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1542821676,
         "version": "1.0.8",
         "changes": [
diff --git a/packages/sol-doc/CHANGELOG.md b/packages/sol-doc/CHANGELOG.md
index a7a7fa0fa..5a1df59c7 100644
--- a/packages/sol-doc/CHANGELOG.md
+++ b/packages/sol-doc/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.0.9 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v1.0.8 - _November 21, 2018_
 
     * Dependencies updated
diff --git a/packages/sol-doc/package.json b/packages/sol-doc/package.json
index 6bf76d47a..edf1707d6 100644
--- a/packages/sol-doc/package.json
+++ b/packages/sol-doc/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/sol-doc",
-    "version": "1.0.8",
+    "version": "1.0.9",
     "description": "Solidity documentation generator",
     "main": "lib/src/index.js",
     "types": "lib/src/index.d.js",
@@ -25,7 +25,7 @@
     "author": "F. Eugene Aumson",
     "license": "Apache-2.0",
     "dependencies": {
-        "@0x/sol-compiler": "^1.1.13",
+        "@0x/sol-compiler": "^1.1.14",
         "@0x/types": "^1.3.0",
         "@0x/utils": "^2.0.6",
         "ethereum-types": "^1.1.2",
diff --git a/packages/subproviders/CHANGELOG.json b/packages/subproviders/CHANGELOG.json
index 62c495b49..6da170be3 100644
--- a/packages/subproviders/CHANGELOG.json
+++ b/packages/subproviders/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "timestamp": 1543401373,
+        "version": "2.1.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
         "timestamp": 1542821676,
         "version": "2.1.5",
         "changes": [
diff --git a/packages/subproviders/CHANGELOG.md b/packages/subproviders/CHANGELOG.md
index 0251b6d9a..01dd8d652 100644
--- a/packages/subproviders/CHANGELOG.md
+++ b/packages/subproviders/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v2.1.6 - _November 28, 2018_
+
+    * Dependencies updated
+
 ## v2.1.5 - _November 21, 2018_
 
     * Dependencies updated
diff --git a/packages/subproviders/package.json b/packages/subproviders/package.json
index 3b367054b..86f3738af 100644
--- a/packages/subproviders/package.json
+++ b/packages/subproviders/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/subproviders",
-    "version": "2.1.5",
+    "version": "2.1.6",
     "engines": {
         "node": ">=6.12"
     },
@@ -33,7 +33,7 @@
         "@0x/types": "^1.3.0",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "@ledgerhq/hw-app-eth": "^4.3.0",
         "@ledgerhq/hw-transport-u2f": "4.24.0",
         "@types/eth-lightwallet": "^3.0.0",
diff --git a/packages/testnet-faucets/package.json b/packages/testnet-faucets/package.json
index cdfd1b7ff..8c4b942a3 100644
--- a/packages/testnet-faucets/package.json
+++ b/packages/testnet-faucets/package.json
@@ -1,7 +1,7 @@
 {
     "private": true,
     "name": "@0x/testnet-faucets",
-    "version": "1.0.57",
+    "version": "1.0.58",
     "engines": {
         "node": ">=6.12"
     },
@@ -18,11 +18,11 @@
     "author": "Fabio Berger",
     "license": "Apache-2.0",
     "dependencies": {
-        "0x.js": "^2.0.5",
-        "@0x/subproviders": "^2.1.5",
+        "0x.js": "^2.0.6",
+        "@0x/subproviders": "^2.1.6",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "body-parser": "^1.17.1",
         "ethereum-types": "^1.1.2",
         "ethereumjs-tx": "^1.3.5",
diff --git a/packages/types/CHANGELOG.json b/packages/types/CHANGELOG.json
index 0b32b60f0..53b24aff0 100644
--- a/packages/types/CHANGELOG.json
+++ b/packages/types/CHANGELOG.json
@@ -1,5 +1,14 @@
 [
     {
+        "version": "1.4.0",
+        "changes": [
+            {
+                "note": "Add `LengthMismatch` and `LengthGreaterThan3Required` revert reasons",
+                "pr": 1224
+            }
+        ]
+    },
+    {
         "version": "1.3.0",
         "changes": [
             {
diff --git a/packages/types/src/index.ts b/packages/types/src/index.ts
index 1a86f45e6..26d8f8e22 100644
--- a/packages/types/src/index.ts
+++ b/packages/types/src/index.ts
@@ -195,6 +195,7 @@ export enum RevertReason {
     FailedExecution = 'FAILED_EXECUTION',
     AssetProxyAlreadyExists = 'ASSET_PROXY_ALREADY_EXISTS',
     LengthGreaterThan0Required = 'LENGTH_GREATER_THAN_0_REQUIRED',
+    LengthGreaterThan3Required = 'LENGTH_GREATER_THAN_3_REQUIRED',
     LengthGreaterThan131Required = 'LENGTH_GREATER_THAN_131_REQUIRED',
     Length0Required = 'LENGTH_0_REQUIRED',
     Length65Required = 'LENGTH_65_REQUIRED',
@@ -209,6 +210,7 @@ export enum RevertReason {
     MakerNotWhitelisted = 'MAKER_NOT_WHITELISTED',
     TakerNotWhitelisted = 'TAKER_NOT_WHITELISTED',
     AssetProxyDoesNotExist = 'ASSET_PROXY_DOES_NOT_EXIST',
+    LengthMismatch = 'LENGTH_MISMATCH',
     LibBytesGreaterThanZeroLengthRequired = 'GREATER_THAN_ZERO_LENGTH_REQUIRED',
     LibBytesGreaterOrEqualTo4LengthRequired = 'GREATER_OR_EQUAL_TO_4_LENGTH_REQUIRED',
     LibBytesGreaterOrEqualTo20LengthRequired = 'GREATER_OR_EQUAL_TO_20_LENGTH_REQUIRED',
diff --git a/packages/utils/CHANGELOG.json b/packages/utils/CHANGELOG.json
index 8c6fb124f..08801a891 100644
--- a/packages/utils/CHANGELOG.json
+++ b/packages/utils/CHANGELOG.json
@@ -1,5 +1,15 @@
 [
     {
+        "timestamp": 1543448882,
+        "version": "2.0.7",
+        "changes": [
+            {
+                "note":
+                    "Optimized ABI Encoder/Decoder. Generates compressed calldata to save gas. Generates human-readable calldata to aid development."
+            }
+        ]
+    },
+    {
         "timestamp": 1542821676,
         "version": "2.0.6",
         "changes": [
diff --git a/packages/utils/package.json b/packages/utils/package.json
index 8dc1f0739..1f4d85843 100644
--- a/packages/utils/package.json
+++ b/packages/utils/package.json
@@ -33,6 +33,9 @@
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
         "chai": "^4.0.1",
+        "chai-as-promised": "^7.1.0",
+        "chai-bignumber": "^2.0.1",
+        "dirty-chai": "^2.0.1",
         "make-promises-safe": "^1.1.0",
         "mocha": "^4.1.0",
         "npm-run-all": "^4.1.2",
@@ -57,4 +60,4 @@
     "publishConfig": {
         "access": "public"
     }
-}
+}
\ No newline at end of file
diff --git a/packages/utils/src/abi_encoder/abstract_data_types/data_type.ts b/packages/utils/src/abi_encoder/abstract_data_types/data_type.ts
new file mode 100644
index 000000000..13cc87e2a
--- /dev/null
+++ b/packages/utils/src/abi_encoder/abstract_data_types/data_type.ts
@@ -0,0 +1,58 @@
+import { DataItem } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { Calldata } from '../calldata/calldata';
+import { CalldataBlock } from '../calldata/calldata_block';
+import { RawCalldata } from '../calldata/raw_calldata';
+import { constants } from '../utils/constants';
+import { DecodingRules, EncodingRules } from '../utils/rules';
+
+import { DataTypeFactory } from './interfaces';
+
+export abstract class DataType {
+    private readonly _dataItem: DataItem;
+    private readonly _factory: DataTypeFactory;
+
+    constructor(dataItem: DataItem, factory: DataTypeFactory) {
+        this._dataItem = dataItem;
+        this._factory = factory;
+    }
+
+    public getDataItem(): DataItem {
+        return this._dataItem;
+    }
+
+    public getFactory(): DataTypeFactory {
+        return this._factory;
+    }
+
+    public encode(value: any, rules?: EncodingRules, selector?: string): string {
+        const rules_ = _.isUndefined(rules) ? constants.DEFAULT_ENCODING_RULES : rules;
+        const calldata = new Calldata(rules_);
+        if (!_.isUndefined(selector)) {
+            calldata.setSelector(selector);
+        }
+        const block = this.generateCalldataBlock(value);
+        calldata.setRoot(block);
+        const encodedCalldata = calldata.toString();
+        return encodedCalldata;
+    }
+
+    public decode(calldata: string, rules?: DecodingRules, selector?: string): any {
+        if (!_.isUndefined(selector) && !_.startsWith(calldata, selector)) {
+            throw new Error(
+                `Tried to decode calldata, but it was missing the function selector. Expected prefix '${selector}'. Got '${calldata}'.`,
+            );
+        }
+        const hasSelector = !_.isUndefined(selector);
+        const rawCalldata = new RawCalldata(calldata, hasSelector);
+        const rules_ = _.isUndefined(rules) ? constants.DEFAULT_DECODING_RULES : rules;
+        const value = this.generateValue(rawCalldata, rules_);
+        return value;
+    }
+
+    public abstract generateCalldataBlock(value: any, parentBlock?: CalldataBlock): CalldataBlock;
+    public abstract generateValue(calldata: RawCalldata, rules: DecodingRules): any;
+    public abstract getSignature(): string;
+    public abstract isStatic(): boolean;
+}
diff --git a/packages/utils/src/abi_encoder/abstract_data_types/interfaces.ts b/packages/utils/src/abi_encoder/abstract_data_types/interfaces.ts
new file mode 100644
index 000000000..2f2f60871
--- /dev/null
+++ b/packages/utils/src/abi_encoder/abstract_data_types/interfaces.ts
@@ -0,0 +1,19 @@
+import { DataItem } from 'ethereum-types';
+
+import { RawCalldata } from '../calldata/raw_calldata';
+
+import { DataType } from './data_type';
+
+export interface DataTypeFactory {
+    create: (dataItem: DataItem, parentDataType?: DataType) => DataType;
+}
+
+export interface DataTypeStaticInterface {
+    matchType: (type: string) => boolean;
+    encodeValue: (value: any) => Buffer;
+    decodeValue: (rawCalldata: RawCalldata) => any;
+}
+
+export interface MemberIndexByName {
+    [key: string]: number;
+}
diff --git a/packages/utils/src/abi_encoder/abstract_data_types/types/blob.ts b/packages/utils/src/abi_encoder/abstract_data_types/types/blob.ts
new file mode 100644
index 000000000..a091e55b9
--- /dev/null
+++ b/packages/utils/src/abi_encoder/abstract_data_types/types/blob.ts
@@ -0,0 +1,40 @@
+import { DataItem } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { BlobCalldataBlock } from '../../calldata/blocks/blob';
+import { CalldataBlock } from '../../calldata/calldata_block';
+import { RawCalldata } from '../../calldata/raw_calldata';
+import { DecodingRules } from '../../utils/rules';
+
+import { DataType } from '../data_type';
+import { DataTypeFactory } from '../interfaces';
+
+export abstract class AbstractBlobDataType extends DataType {
+    protected _sizeKnownAtCompileTime: boolean;
+
+    public constructor(dataItem: DataItem, factory: DataTypeFactory, sizeKnownAtCompileTime: boolean) {
+        super(dataItem, factory);
+        this._sizeKnownAtCompileTime = sizeKnownAtCompileTime;
+    }
+
+    public generateCalldataBlock(value: any, parentBlock?: CalldataBlock): BlobCalldataBlock {
+        const encodedValue = this.encodeValue(value);
+        const name = this.getDataItem().name;
+        const signature = this.getSignature();
+        const parentName = _.isUndefined(parentBlock) ? '' : parentBlock.getName();
+        const block = new BlobCalldataBlock(name, signature, parentName, encodedValue);
+        return block;
+    }
+
+    public generateValue(calldata: RawCalldata, rules: DecodingRules): any {
+        const value = this.decodeValue(calldata);
+        return value;
+    }
+
+    public isStatic(): boolean {
+        return this._sizeKnownAtCompileTime;
+    }
+
+    public abstract encodeValue(value: any): Buffer;
+    public abstract decodeValue(calldata: RawCalldata): any;
+}
diff --git a/packages/utils/src/abi_encoder/abstract_data_types/types/pointer.ts b/packages/utils/src/abi_encoder/abstract_data_types/types/pointer.ts
new file mode 100644
index 000000000..0f3c55280
--- /dev/null
+++ b/packages/utils/src/abi_encoder/abstract_data_types/types/pointer.ts
@@ -0,0 +1,54 @@
+import { DataItem } from 'ethereum-types';
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
+
+import { PointerCalldataBlock } from '../../calldata/blocks/pointer';
+import { CalldataBlock } from '../../calldata/calldata_block';
+import { RawCalldata } from '../../calldata/raw_calldata';
+import { constants } from '../../utils/constants';
+import { DecodingRules } from '../../utils/rules';
+
+import { DataType } from '../data_type';
+import { DataTypeFactory } from '../interfaces';
+
+export abstract class AbstractPointerDataType extends DataType {
+    protected _destination: DataType;
+    protected _parent: DataType;
+
+    public constructor(dataItem: DataItem, factory: DataTypeFactory, destination: DataType, parent: DataType) {
+        super(dataItem, factory);
+        this._destination = destination;
+        this._parent = parent;
+    }
+
+    public generateCalldataBlock(value: any, parentBlock?: CalldataBlock): PointerCalldataBlock {
+        if (_.isUndefined(parentBlock)) {
+            throw new Error(`DependentDataType requires a parent block to generate its block`);
+        }
+        const destinationBlock = this._destination.generateCalldataBlock(value, parentBlock);
+        const name = this.getDataItem().name;
+        const signature = this.getSignature();
+        const parentName = parentBlock.getName();
+        const block = new PointerCalldataBlock(name, signature, parentName, destinationBlock, parentBlock);
+        return block;
+    }
+
+    public generateValue(calldata: RawCalldata, rules: DecodingRules): any {
+        const destinationOffsetBuf = calldata.popWord();
+        const destinationOffsetHex = ethUtil.bufferToHex(destinationOffsetBuf);
+        const destinationOffsetRelative = parseInt(destinationOffsetHex, constants.HEX_BASE);
+        const destinationOffsetAbsolute = calldata.toAbsoluteOffset(destinationOffsetRelative);
+        const currentOffset = calldata.getOffset();
+        calldata.setOffset(destinationOffsetAbsolute);
+        const value = this._destination.generateValue(calldata, rules);
+        calldata.setOffset(currentOffset);
+        return value;
+    }
+
+    // Disable prefer-function-over-method for inherited abstract method.
+    /* tslint:disable prefer-function-over-method */
+    public isStatic(): boolean {
+        return true;
+    }
+    /* tslint:enable prefer-function-over-method */
+}
diff --git a/packages/utils/src/abi_encoder/abstract_data_types/types/set.ts b/packages/utils/src/abi_encoder/abstract_data_types/types/set.ts
new file mode 100644
index 000000000..089d04659
--- /dev/null
+++ b/packages/utils/src/abi_encoder/abstract_data_types/types/set.ts
@@ -0,0 +1,218 @@
+import { DataItem } from 'ethereum-types';
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
+
+import { BigNumber } from '../../../configured_bignumber';
+import { SetCalldataBlock } from '../../calldata/blocks/set';
+import { CalldataBlock } from '../../calldata/calldata_block';
+import { RawCalldata } from '../../calldata/raw_calldata';
+import { constants } from '../../utils/constants';
+import { DecodingRules } from '../../utils/rules';
+
+import { DataType } from '../data_type';
+import { DataTypeFactory, MemberIndexByName } from '../interfaces';
+
+import { AbstractPointerDataType } from './pointer';
+
+export abstract class AbstractSetDataType extends DataType {
+    protected readonly _arrayLength: number | undefined;
+    protected readonly _arrayElementType: string | undefined;
+    private readonly _memberIndexByName: MemberIndexByName;
+    private readonly _members: DataType[];
+    private readonly _isArray: boolean;
+
+    public constructor(
+        dataItem: DataItem,
+        factory: DataTypeFactory,
+        isArray: boolean = false,
+        arrayLength?: number,
+        arrayElementType?: string,
+    ) {
+        super(dataItem, factory);
+        this._memberIndexByName = {};
+        this._members = [];
+        this._isArray = isArray;
+        this._arrayLength = arrayLength;
+        this._arrayElementType = arrayElementType;
+        if (isArray && !_.isUndefined(arrayLength)) {
+            [this._members, this._memberIndexByName] = this._createMembersWithLength(dataItem, arrayLength);
+        } else if (!isArray) {
+            [this._members, this._memberIndexByName] = this._createMembersWithKeys(dataItem);
+        }
+    }
+
+    public generateCalldataBlock(value: any[] | object, parentBlock?: CalldataBlock): SetCalldataBlock {
+        const block =
+            value instanceof Array
+                ? this._generateCalldataBlockFromArray(value, parentBlock)
+                : this._generateCalldataBlockFromObject(value, parentBlock);
+        return block;
+    }
+
+    public generateValue(calldata: RawCalldata, rules: DecodingRules): any[] | object {
+        let members = this._members;
+        // Case 1: This is an array of undefined length, which means that `this._members` was not
+        //         populated in the constructor. So we must construct the set of members now.
+        if (this._isArray && _.isUndefined(this._arrayLength)) {
+            const arrayLengthBuf = calldata.popWord();
+            const arrayLengthHex = ethUtil.bufferToHex(arrayLengthBuf);
+            const arrayLength = new BigNumber(arrayLengthHex, constants.HEX_BASE);
+            [members] = this._createMembersWithLength(this.getDataItem(), arrayLength.toNumber());
+        }
+        // Create a new scope in the calldata, before descending into the members of this set.
+        calldata.startScope();
+        let value: any[] | object;
+        if (rules.structsAsObjects && !this._isArray) {
+            // Construct an object with values for each member of the set.
+            value = {};
+            _.each(this._memberIndexByName, (idx: number, key: string) => {
+                const member = this._members[idx];
+                const memberValue = member.generateValue(calldata, rules);
+                (value as { [key: string]: any })[key] = memberValue;
+            });
+        } else {
+            // Construct an array with values for each member of the set.
+            value = [];
+            _.each(members, (member: DataType, idx: number) => {
+                const memberValue = member.generateValue(calldata, rules);
+                (value as any[]).push(memberValue);
+            });
+        }
+        // Close this scope and return tetheh value.
+        calldata.endScope();
+        return value;
+    }
+
+    public isStatic(): boolean {
+        // An array with an undefined length is never static.
+        if (this._isArray && _.isUndefined(this._arrayLength)) {
+            return false;
+        }
+        // If any member of the set is a pointer then the set is not static.
+        const dependentMember = _.find(this._members, (member: DataType) => {
+            return member instanceof AbstractPointerDataType;
+        });
+        const isStatic = _.isUndefined(dependentMember);
+        return isStatic;
+    }
+
+    protected _generateCalldataBlockFromArray(value: any[], parentBlock?: CalldataBlock): SetCalldataBlock {
+        // Sanity check: if the set has a defined length then `value` must have the same length.
+        if (!_.isUndefined(this._arrayLength) && value.length !== this._arrayLength) {
+            throw new Error(
+                `Expected array of ${JSON.stringify(
+                    this._arrayLength,
+                )} elements, but got array of length ${JSON.stringify(value.length)}`,
+            );
+        }
+        // Create a new calldata block for this set.
+        const parentName = _.isUndefined(parentBlock) ? '' : parentBlock.getName();
+        const block = new SetCalldataBlock(this.getDataItem().name, this.getSignature(), parentName);
+        // If this set has an undefined length then set its header to be the number of elements.
+        let members = this._members;
+        if (this._isArray && _.isUndefined(this._arrayLength)) {
+            [members] = this._createMembersWithLength(this.getDataItem(), value.length);
+            const lenBuf = ethUtil.setLengthLeft(
+                ethUtil.toBuffer(`0x${value.length.toString(constants.HEX_BASE)}`),
+                constants.EVM_WORD_WIDTH_IN_BYTES,
+            );
+            block.setHeader(lenBuf);
+        }
+        // Create blocks for members of set.
+        const memberCalldataBlocks: CalldataBlock[] = [];
+        _.each(members, (member: DataType, idx: number) => {
+            const memberBlock = member.generateCalldataBlock(value[idx], block);
+            memberCalldataBlocks.push(memberBlock);
+        });
+        block.setMembers(memberCalldataBlocks);
+        return block;
+    }
+
+    protected _generateCalldataBlockFromObject(obj: object, parentBlock?: CalldataBlock): SetCalldataBlock {
+        // Create a new calldata block for this set.
+        const parentName = _.isUndefined(parentBlock) ? '' : parentBlock.getName();
+        const block = new SetCalldataBlock(this.getDataItem().name, this.getSignature(), parentName);
+        // Create blocks for members of set.
+        const memberCalldataBlocks: CalldataBlock[] = [];
+        const childMap = _.cloneDeep(this._memberIndexByName);
+        _.forOwn(obj, (value: any, key: string) => {
+            if (!(key in childMap)) {
+                throw new Error(
+                    `Could not assign tuple to object: unrecognized key '${key}' in object ${this.getDataItem().name}`,
+                );
+            }
+            const memberBlock = this._members[this._memberIndexByName[key]].generateCalldataBlock(value, block);
+            memberCalldataBlocks.push(memberBlock);
+            delete childMap[key];
+        });
+        // Sanity check that all members have been included.
+        if (Object.keys(childMap).length !== 0) {
+            throw new Error(`Could not assign tuple to object: missing keys ${Object.keys(childMap)}`);
+        }
+        // Associate member blocks with Set block.
+        block.setMembers(memberCalldataBlocks);
+        return block;
+    }
+
+    protected _computeSignatureOfMembers(): string {
+        // Compute signature of members
+        let signature = `(`;
+        _.each(this._members, (member: DataType, i: number) => {
+            signature += member.getSignature();
+            if (i < this._members.length - 1) {
+                signature += ',';
+            }
+        });
+        signature += ')';
+        return signature;
+    }
+
+    private _createMembersWithKeys(dataItem: DataItem): [DataType[], MemberIndexByName] {
+        // Sanity check
+        if (_.isUndefined(dataItem.components)) {
+            throw new Error(
+                `Tried to create a set using key/value pairs, but no components were defined by the input DataItem '${
+                    dataItem.name
+                }'.`,
+            );
+        }
+        // Create one member for each component of `dataItem`
+        const members: DataType[] = [];
+        const memberIndexByName: MemberIndexByName = {};
+        _.each(dataItem.components, (memberItem: DataItem) => {
+            const childDataItem: DataItem = {
+                type: memberItem.type,
+                name: `${dataItem.name}.${memberItem.name}`,
+            };
+            const components = memberItem.components;
+            if (!_.isUndefined(components)) {
+                childDataItem.components = components;
+            }
+            const child = this.getFactory().create(childDataItem, this);
+            memberIndexByName[memberItem.name] = members.length;
+            members.push(child);
+        });
+        return [members, memberIndexByName];
+    }
+
+    private _createMembersWithLength(dataItem: DataItem, length: number): [DataType[], MemberIndexByName] {
+        // Create `length` members, deriving the type from `dataItem`
+        const members: DataType[] = [];
+        const memberIndexByName: MemberIndexByName = {};
+        const range = _.range(length);
+        _.each(range, (idx: number) => {
+            const memberDataItem: DataItem = {
+                type: _.isUndefined(this._arrayElementType) ? '' : this._arrayElementType,
+                name: `${dataItem.name}[${idx.toString(constants.DEC_BASE)}]`,
+            };
+            const components = dataItem.components;
+            if (!_.isUndefined(components)) {
+                memberDataItem.components = components;
+            }
+            const memberType = this.getFactory().create(memberDataItem, this);
+            memberIndexByName[idx.toString(constants.DEC_BASE)] = members.length;
+            members.push(memberType);
+        });
+        return [members, memberIndexByName];
+    }
+}
diff --git a/packages/utils/src/abi_encoder/calldata/blocks/blob.ts b/packages/utils/src/abi_encoder/calldata/blocks/blob.ts
new file mode 100644
index 000000000..219ea6c61
--- /dev/null
+++ b/packages/utils/src/abi_encoder/calldata/blocks/blob.ts
@@ -0,0 +1,20 @@
+import { CalldataBlock } from '../calldata_block';
+
+export class BlobCalldataBlock extends CalldataBlock {
+    private readonly _blob: Buffer;
+
+    constructor(name: string, signature: string, parentName: string, blob: Buffer) {
+        const headerSizeInBytes = 0;
+        const bodySizeInBytes = blob.byteLength;
+        super(name, signature, parentName, headerSizeInBytes, bodySizeInBytes);
+        this._blob = blob;
+    }
+
+    public toBuffer(): Buffer {
+        return this._blob;
+    }
+
+    public getRawData(): Buffer {
+        return this._blob;
+    }
+}
diff --git a/packages/utils/src/abi_encoder/calldata/blocks/pointer.ts b/packages/utils/src/abi_encoder/calldata/blocks/pointer.ts
new file mode 100644
index 000000000..72d6a3173
--- /dev/null
+++ b/packages/utils/src/abi_encoder/calldata/blocks/pointer.ts
@@ -0,0 +1,61 @@
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
+
+import { constants } from '../../utils/constants';
+
+import { CalldataBlock } from '../calldata_block';
+
+export class PointerCalldataBlock extends CalldataBlock {
+    public static readonly RAW_DATA_START = new Buffer('<');
+    public static readonly RAW_DATA_END = new Buffer('>');
+    private static readonly _DEPENDENT_PAYLOAD_SIZE_IN_BYTES = 32;
+    private static readonly _EMPTY_HEADER_SIZE = 0;
+    private readonly _parent: CalldataBlock;
+    private readonly _dependency: CalldataBlock;
+    private _aliasFor: CalldataBlock | undefined;
+
+    constructor(name: string, signature: string, parentName: string, dependency: CalldataBlock, parent: CalldataBlock) {
+        const headerSizeInBytes = PointerCalldataBlock._EMPTY_HEADER_SIZE;
+        const bodySizeInBytes = PointerCalldataBlock._DEPENDENT_PAYLOAD_SIZE_IN_BYTES;
+        super(name, signature, parentName, headerSizeInBytes, bodySizeInBytes);
+        this._parent = parent;
+        this._dependency = dependency;
+        this._aliasFor = undefined;
+    }
+
+    public toBuffer(): Buffer {
+        const destinationOffset = !_.isUndefined(this._aliasFor)
+            ? this._aliasFor.getOffsetInBytes()
+            : this._dependency.getOffsetInBytes();
+        const parentOffset = this._parent.getOffsetInBytes();
+        const parentHeaderSize = this._parent.getHeaderSizeInBytes();
+        const pointer: number = destinationOffset - (parentOffset + parentHeaderSize);
+        const pointerHex = `0x${pointer.toString(constants.HEX_BASE)}`;
+        const pointerBuf = ethUtil.toBuffer(pointerHex);
+        const pointerBufPadded = ethUtil.setLengthLeft(pointerBuf, constants.EVM_WORD_WIDTH_IN_BYTES);
+        return pointerBufPadded;
+    }
+
+    public getDependency(): CalldataBlock {
+        return this._dependency;
+    }
+
+    public setAlias(block: CalldataBlock): void {
+        this._aliasFor = block;
+        this._setName(`${this.getName()} (alias for ${block.getName()})`);
+    }
+
+    public getAlias(): CalldataBlock | undefined {
+        return this._aliasFor;
+    }
+
+    public getRawData(): Buffer {
+        const dependencyRawData = this._dependency.getRawData();
+        const rawDataComponents: Buffer[] = [];
+        rawDataComponents.push(PointerCalldataBlock.RAW_DATA_START);
+        rawDataComponents.push(dependencyRawData);
+        rawDataComponents.push(PointerCalldataBlock.RAW_DATA_END);
+        const rawData = Buffer.concat(rawDataComponents);
+        return rawData;
+    }
+}
diff --git a/packages/utils/src/abi_encoder/calldata/blocks/set.ts b/packages/utils/src/abi_encoder/calldata/blocks/set.ts
new file mode 100644
index 000000000..d1abc4986
--- /dev/null
+++ b/packages/utils/src/abi_encoder/calldata/blocks/set.ts
@@ -0,0 +1,47 @@
+import * as _ from 'lodash';
+
+import { CalldataBlock } from '../calldata_block';
+
+export class SetCalldataBlock extends CalldataBlock {
+    private _header: Buffer | undefined;
+    private _members: CalldataBlock[];
+
+    constructor(name: string, signature: string, parentName: string) {
+        super(name, signature, parentName, 0, 0);
+        this._members = [];
+        this._header = undefined;
+    }
+
+    public getRawData(): Buffer {
+        const rawDataComponents: Buffer[] = [];
+        if (!_.isUndefined(this._header)) {
+            rawDataComponents.push(this._header);
+        }
+        _.each(this._members, (member: CalldataBlock) => {
+            const memberBuffer = member.getRawData();
+            rawDataComponents.push(memberBuffer);
+        });
+        const rawData = Buffer.concat(rawDataComponents);
+        return rawData;
+    }
+
+    public setMembers(members: CalldataBlock[]): void {
+        this._members = members;
+    }
+
+    public setHeader(header: Buffer): void {
+        this._setHeaderSize(header.byteLength);
+        this._header = header;
+    }
+
+    public toBuffer(): Buffer {
+        if (!_.isUndefined(this._header)) {
+            return this._header;
+        }
+        return new Buffer('');
+    }
+
+    public getMembers(): CalldataBlock[] {
+        return this._members;
+    }
+}
diff --git a/packages/utils/src/abi_encoder/calldata/calldata.ts b/packages/utils/src/abi_encoder/calldata/calldata.ts
new file mode 100644
index 000000000..5f3eee94a
--- /dev/null
+++ b/packages/utils/src/abi_encoder/calldata/calldata.ts
@@ -0,0 +1,243 @@
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
+
+import { constants } from '../utils/constants';
+import { EncodingRules } from '../utils/rules';
+
+import { PointerCalldataBlock } from './blocks/pointer';
+import { SetCalldataBlock } from './blocks/set';
+import { CalldataBlock } from './calldata_block';
+import { CalldataIterator, ReverseCalldataIterator } from './iterator';
+
+export class Calldata {
+    private readonly _rules: EncodingRules;
+    private _selector: string;
+    private _root: CalldataBlock | undefined;
+
+    public constructor(rules: EncodingRules) {
+        this._rules = rules;
+        this._selector = '';
+        this._root = undefined;
+    }
+    /**
+     * Sets the root calldata block. This block usually corresponds to a Method.
+     */
+    public setRoot(block: CalldataBlock): void {
+        this._root = block;
+    }
+    /**
+     * Sets the selector to be prepended onto the calldata.
+     * If the root block was created by a Method then a selector will likely be set.
+     */
+    public setSelector(selector: string): void {
+        if (!_.startsWith(selector, '0x')) {
+            throw new Error(`Expected selector to be hex. Missing prefix '0x'`);
+        } else if (selector.length !== constants.HEX_SELECTOR_LENGTH_IN_CHARS) {
+            throw new Error(`Invalid selector '${selector}'`);
+        }
+        this._selector = selector;
+    }
+    /**
+     * Iterates through the calldata blocks, starting from the root block, to construct calldata as a hex string.
+     * If the `optimize` flag is set then this calldata will be condensed, to save gas.
+     * If the `annotate` flag is set then this will return human-readable calldata.
+     * If the `annotate` flag is *not* set then this will return EVM-compatible calldata.
+     */
+    public toString(): string {
+        // Sanity check: root block must be set
+        if (_.isUndefined(this._root)) {
+            throw new Error('expected root');
+        }
+        // Optimize, if flag set
+        if (this._rules.optimize) {
+            this._optimize();
+        }
+        // Set offsets
+        const iterator = new CalldataIterator(this._root);
+        let offset = 0;
+        for (const block of iterator) {
+            block.setOffset(offset);
+            offset += block.getSizeInBytes();
+        }
+        // Generate hex string
+        const hexString = this._rules.annotate ? this._toHumanReadableCallData() : this._toEvmCompatibeCallDataHex();
+        return hexString;
+    }
+    /**
+     * There are three types of calldata blocks: Blob, Set and Pointer.
+     * Scenarios arise where distinct pointers resolve to identical values.
+     * We optimize by keeping only one such instance of the identical value, and redirecting all pointers here.
+     * We keep the last such duplicate value because pointers can only be positive (they cannot point backwards).
+     *
+     * Example #1:
+     *  function f(string[], string[])
+     *  f(["foo", "bar", "blitz"], ["foo", "bar", "blitz"])
+     *  The array ["foo", "bar", "blitz"] will only be included in the calldata once.
+     *
+     * Example #2:
+     *  function f(string[], string)
+     *  f(["foo", "bar", "blitz"], "foo")
+     *  The string "foo" will only be included in the calldata once.
+     *
+     * Example #3:
+     *  function f((string, uint, bytes), string, uint, bytes)
+     *  f(("foo", 5, "0x05"), "foo", 5, "0x05")
+     *  The string "foo" and bytes "0x05" will only be included in the calldata once.
+     *  The duplicate `uint 5` values cannot be optimized out because they are static values (no pointer points to them).
+     *
+     * @TODO #1:
+     *   This optimization strategy handles blocks that are exact duplicates of one another.
+     *   But what if some block is a combination of two other blocks? Or a subset of another block?
+     *   This optimization problem is not much different from the current implemetation.
+     *   Instead of tracking "observed" hashes, at each node we would simply do pattern-matching on the calldata.
+     *   This strategy would be applied after assigning offsets to the tree, rather than before (as in this strategy).
+     *   Note that one consequence of this strategy is pointers may resolve to offsets that are not word-aligned.
+     *   This shouldn't be a problem but further investigation should be done.
+     *
+     * @TODO #2:
+     *   To be done as a follow-up to @TODO #1.
+     *   Since we optimize from the bottom-up, we could be affecting the outcome of a later potential optimization.
+     *   For example, what if by removing one duplicate value we miss out on optimizing another block higher in the tree.
+     *   To handle this case, at each node we can store a candidate optimization in a priority queue (sorted by calldata size).
+     *   At the end of traversing the tree, the candidate at the front of the queue will be the most optimal output.
+     *
+     */
+    private _optimize(): void {
+        // Step 1/1 Create a reverse iterator (starts from the end of the calldata to the beginning)
+        if (_.isUndefined(this._root)) {
+            throw new Error('expected root');
+        }
+        const iterator = new ReverseCalldataIterator(this._root);
+        // Step 2/2 Iterate over each block, keeping track of which blocks have been seen and pruning redundant blocks.
+        const blocksByHash: { [key: string]: CalldataBlock } = {};
+        for (const block of iterator) {
+            // If a block is a pointer and its value has already been observed, then update
+            // the pointer to resolve to the existing value.
+            if (block instanceof PointerCalldataBlock) {
+                const dependencyBlockHashBuf = block.getDependency().computeHash();
+                const dependencyBlockHash = ethUtil.bufferToHex(dependencyBlockHashBuf);
+                if (dependencyBlockHash in blocksByHash) {
+                    const blockWithSameHash = blocksByHash[dependencyBlockHash];
+                    if (blockWithSameHash !== block.getDependency()) {
+                        block.setAlias(blockWithSameHash);
+                    }
+                }
+                continue;
+            }
+            // This block has not been seen. Record its hash.
+            const blockHashBuf = block.computeHash();
+            const blockHash = ethUtil.bufferToHex(blockHashBuf);
+            if (!(blockHash in blocksByHash)) {
+                blocksByHash[blockHash] = block;
+            }
+        }
+    }
+    private _toEvmCompatibeCallDataHex(): string {
+        // Sanity check: must have a root block.
+        if (_.isUndefined(this._root)) {
+            throw new Error('expected root');
+        }
+        // Construct an array of buffers (one buffer for each block).
+        const selectorBuffer = ethUtil.toBuffer(this._selector);
+        const valueBufs: Buffer[] = [selectorBuffer];
+        const iterator = new CalldataIterator(this._root);
+        for (const block of iterator) {
+            valueBufs.push(block.toBuffer());
+        }
+        // Create hex from buffer array.
+        const combinedBuffers = Buffer.concat(valueBufs);
+        const hexValue = ethUtil.bufferToHex(combinedBuffers);
+        return hexValue;
+    }
+    /**
+     * Returns human-readable calldata.
+     *
+     * Example:
+     *   simpleFunction(string[], string[])
+     *   strings = ["Hello", "World"]
+     *   simpleFunction(strings, strings)
+     *
+     * Output:
+     *   0xbb4f12e3
+     *                                                                                      ### simpleFunction
+     *   0x0       0000000000000000000000000000000000000000000000000000000000000040              ptr<array1> (alias for array2)
+     *   0x20      0000000000000000000000000000000000000000000000000000000000000040              ptr<array2>
+     *
+     *   0x40      0000000000000000000000000000000000000000000000000000000000000002          ### array2
+     *   0x60      0000000000000000000000000000000000000000000000000000000000000040              ptr<array2[0]>
+     *   0x80      0000000000000000000000000000000000000000000000000000000000000080              ptr<array2[1]>
+     *   0xa0      0000000000000000000000000000000000000000000000000000000000000005              array2[0]
+     *   0xc0      48656c6c6f000000000000000000000000000000000000000000000000000000
+     *   0xe0      0000000000000000000000000000000000000000000000000000000000000005              array2[1]
+     *   0x100     576f726c64000000000000000000000000000000000000000000000000000000
+     */
+    private _toHumanReadableCallData(): string {
+        // Sanity check: must have a root block.
+        if (_.isUndefined(this._root)) {
+            throw new Error('expected root');
+        }
+        // Constants for constructing annotated string
+        const offsetPadding = 10;
+        const valuePadding = 74;
+        const namePadding = 80;
+        const evmWordStartIndex = 0;
+        const emptySize = 0;
+        // Construct annotated calldata
+        let hexValue = `${this._selector}`;
+        let offset = 0;
+        const functionName: string = this._root.getName();
+        const iterator = new CalldataIterator(this._root);
+        for (const block of iterator) {
+            // Process each block 1 word at a time
+            const size = block.getSizeInBytes();
+            const name = block.getName();
+            const parentName = block.getParentName();
+            const prettyName = name.replace(`${parentName}.`, '').replace(`${functionName}.`, '');
+            // Resulting line will be <offsetStr><valueStr><nameStr>
+            let offsetStr = '';
+            let valueStr = '';
+            let nameStr = '';
+            let lineStr = '';
+            if (size === emptySize) {
+                // This is a Set block with no header.
+                // For example, a tuple or an array with a defined length.
+                offsetStr = ' '.repeat(offsetPadding);
+                valueStr = ' '.repeat(valuePadding);
+                nameStr = `### ${prettyName.padEnd(namePadding)}`;
+                lineStr = `\n${offsetStr}${valueStr}${nameStr}`;
+            } else {
+                // This block has at least one word of value.
+                offsetStr = `0x${offset.toString(constants.HEX_BASE)}`.padEnd(offsetPadding);
+                valueStr = ethUtil
+                    .stripHexPrefix(
+                        ethUtil.bufferToHex(
+                            block.toBuffer().slice(evmWordStartIndex, constants.EVM_WORD_WIDTH_IN_BYTES),
+                        ),
+                    )
+                    .padEnd(valuePadding);
+                if (block instanceof SetCalldataBlock) {
+                    nameStr = `### ${prettyName.padEnd(namePadding)}`;
+                    lineStr = `\n${offsetStr}${valueStr}${nameStr}`;
+                } else {
+                    nameStr = `    ${prettyName.padEnd(namePadding)}`;
+                    lineStr = `${offsetStr}${valueStr}${nameStr}`;
+                }
+            }
+            // This block has a value that is more than 1 word.
+            for (let j = constants.EVM_WORD_WIDTH_IN_BYTES; j < size; j += constants.EVM_WORD_WIDTH_IN_BYTES) {
+                offsetStr = `0x${(offset + j).toString(constants.HEX_BASE)}`.padEnd(offsetPadding);
+                valueStr = ethUtil
+                    .stripHexPrefix(
+                        ethUtil.bufferToHex(block.toBuffer().slice(j, j + constants.EVM_WORD_WIDTH_IN_BYTES)),
+                    )
+                    .padEnd(valuePadding);
+                nameStr = ' '.repeat(namePadding);
+                lineStr = `${lineStr}\n${offsetStr}${valueStr}${nameStr}`;
+            }
+            // Append to hex value
+            hexValue = `${hexValue}\n${lineStr}`;
+            offset += size;
+        }
+        return hexValue;
+    }
+}
diff --git a/packages/utils/src/abi_encoder/calldata/calldata_block.ts b/packages/utils/src/abi_encoder/calldata/calldata_block.ts
new file mode 100644
index 000000000..35bd994e5
--- /dev/null
+++ b/packages/utils/src/abi_encoder/calldata/calldata_block.ts
@@ -0,0 +1,77 @@
+import * as ethUtil from 'ethereumjs-util';
+
+export abstract class CalldataBlock {
+    private readonly _signature: string;
+    private readonly _parentName: string;
+    private _name: string;
+    private _offsetInBytes: number;
+    private _headerSizeInBytes: number;
+    private _bodySizeInBytes: number;
+
+    constructor(
+        name: string,
+        signature: string,
+        parentName: string,
+        headerSizeInBytes: number,
+        bodySizeInBytes: number,
+    ) {
+        this._name = name;
+        this._signature = signature;
+        this._parentName = parentName;
+        this._offsetInBytes = 0;
+        this._headerSizeInBytes = headerSizeInBytes;
+        this._bodySizeInBytes = bodySizeInBytes;
+    }
+
+    protected _setHeaderSize(headerSizeInBytes: number): void {
+        this._headerSizeInBytes = headerSizeInBytes;
+    }
+
+    protected _setBodySize(bodySizeInBytes: number): void {
+        this._bodySizeInBytes = bodySizeInBytes;
+    }
+
+    protected _setName(name: string): void {
+        this._name = name;
+    }
+
+    public getName(): string {
+        return this._name;
+    }
+
+    public getParentName(): string {
+        return this._parentName;
+    }
+
+    public getSignature(): string {
+        return this._signature;
+    }
+    public getHeaderSizeInBytes(): number {
+        return this._headerSizeInBytes;
+    }
+
+    public getBodySizeInBytes(): number {
+        return this._bodySizeInBytes;
+    }
+
+    public getSizeInBytes(): number {
+        return this.getHeaderSizeInBytes() + this.getBodySizeInBytes();
+    }
+
+    public getOffsetInBytes(): number {
+        return this._offsetInBytes;
+    }
+
+    public setOffset(offsetInBytes: number): void {
+        this._offsetInBytes = offsetInBytes;
+    }
+
+    public computeHash(): Buffer {
+        const rawData = this.getRawData();
+        const hash = ethUtil.sha3(rawData);
+        return hash;
+    }
+
+    public abstract toBuffer(): Buffer;
+    public abstract getRawData(): Buffer;
+}
diff --git a/packages/utils/src/abi_encoder/calldata/iterator.ts b/packages/utils/src/abi_encoder/calldata/iterator.ts
new file mode 100644
index 000000000..333b32b4f
--- /dev/null
+++ b/packages/utils/src/abi_encoder/calldata/iterator.ts
@@ -0,0 +1,114 @@
+/* tslint:disable max-classes-per-file */
+import * as _ from 'lodash';
+
+import { Queue } from '../utils/queue';
+
+import { BlobCalldataBlock } from './blocks/blob';
+import { PointerCalldataBlock } from './blocks/pointer';
+import { SetCalldataBlock } from './blocks/set';
+import { CalldataBlock } from './calldata_block';
+
+/**
+ * Iterator class for Calldata Blocks. Blocks follows the order
+ * they should be put into calldata that is passed to he EVM.
+ *
+ * Example #1:
+ * Let root = Set {
+ *                  Blob{} A,
+ *                  Pointer {
+ *                      Blob{} a
+ *                  } B,
+ *                  Blob{} C
+ *            }
+ * It will iterate as follows: [A, B, C, B.a]
+ *
+ * Example #2:
+ * Let root = Set {
+ *                  Blob{} A,
+ *                  Pointer {
+ *                      Blob{} a
+ *                      Pointer {
+ *                          Blob{} b
+ *                      }
+ *                  } B,
+ *                  Pointer {
+ *                      Blob{} c
+ *                  } C
+ *            }
+ * It will iterate as follows: [A, B, C, B.a, B.b, C.c]
+ */
+abstract class BaseIterator implements Iterable<CalldataBlock> {
+    protected readonly _root: CalldataBlock;
+    protected readonly _queue: Queue<CalldataBlock>;
+
+    private static _createQueue(block: CalldataBlock): Queue<CalldataBlock> {
+        const queue = new Queue<CalldataBlock>();
+        // Base case
+        if (!(block instanceof SetCalldataBlock)) {
+            queue.pushBack(block);
+            return queue;
+        }
+        // This is a set; add members
+        const set = block;
+        _.eachRight(set.getMembers(), (member: CalldataBlock) => {
+            queue.mergeFront(BaseIterator._createQueue(member));
+        });
+        // Add children
+        _.each(set.getMembers(), (member: CalldataBlock) => {
+            // Traverse child if it is a unique pointer.
+            // A pointer that is an alias for another pointer is ignored.
+            if (member instanceof PointerCalldataBlock && _.isUndefined(member.getAlias())) {
+                const dependency = member.getDependency();
+                queue.mergeBack(BaseIterator._createQueue(dependency));
+            }
+        });
+        // Put set block at the front of the queue
+        queue.pushFront(set);
+        return queue;
+    }
+
+    public constructor(root: CalldataBlock) {
+        this._root = root;
+        this._queue = BaseIterator._createQueue(root);
+    }
+
+    public [Symbol.iterator](): { next: () => IteratorResult<CalldataBlock> } {
+        return {
+            next: () => {
+                const nextBlock = this.nextBlock();
+                if (!_.isUndefined(nextBlock)) {
+                    return {
+                        value: nextBlock,
+                        done: false,
+                    };
+                }
+                return {
+                    done: true,
+                    value: new BlobCalldataBlock('', '', '', new Buffer('')),
+                };
+            },
+        };
+    }
+
+    public abstract nextBlock(): CalldataBlock | undefined;
+}
+
+export class CalldataIterator extends BaseIterator {
+    public constructor(root: CalldataBlock) {
+        super(root);
+    }
+
+    public nextBlock(): CalldataBlock | undefined {
+        return this._queue.popFront();
+    }
+}
+
+export class ReverseCalldataIterator extends BaseIterator {
+    public constructor(root: CalldataBlock) {
+        super(root);
+    }
+
+    public nextBlock(): CalldataBlock | undefined {
+        return this._queue.popBack();
+    }
+}
diff --git a/packages/utils/src/abi_encoder/calldata/raw_calldata.ts b/packages/utils/src/abi_encoder/calldata/raw_calldata.ts
new file mode 100644
index 000000000..189841989
--- /dev/null
+++ b/packages/utils/src/abi_encoder/calldata/raw_calldata.ts
@@ -0,0 +1,82 @@
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
+
+import { constants } from '../utils/constants';
+import { Queue } from '../utils/queue';
+
+export class RawCalldata {
+    private static readonly _INITIAL_OFFSET = 0;
+    private readonly _value: Buffer;
+    private readonly _selector: string;
+    private readonly _scopes: Queue<number>;
+    private _offset: number;
+
+    public constructor(value: string | Buffer, hasSelector: boolean = true) {
+        // Sanity check
+        if (typeof value === 'string' && !_.startsWith(value, '0x')) {
+            throw new Error(`Expected raw calldata to start with '0x'`);
+        }
+        // Construct initial values
+        this._value = ethUtil.toBuffer(value);
+        this._selector = '0x';
+        this._scopes = new Queue<number>();
+        this._scopes.pushBack(RawCalldata._INITIAL_OFFSET);
+        this._offset = RawCalldata._INITIAL_OFFSET;
+        // If there's a selector then slice it
+        if (hasSelector) {
+            const selectorBuf = this._value.slice(constants.HEX_SELECTOR_LENGTH_IN_BYTES);
+            this._value = this._value.slice(constants.HEX_SELECTOR_LENGTH_IN_BYTES);
+            this._selector = ethUtil.bufferToHex(selectorBuf);
+        }
+    }
+
+    public popBytes(lengthInBytes: number): Buffer {
+        const value = this._value.slice(this._offset, this._offset + lengthInBytes);
+        this.setOffset(this._offset + lengthInBytes);
+        return value;
+    }
+
+    public popWord(): Buffer {
+        const wordInBytes = 32;
+        return this.popBytes(wordInBytes);
+    }
+
+    public popWords(length: number): Buffer {
+        const wordInBytes = 32;
+        return this.popBytes(length * wordInBytes);
+    }
+
+    public readBytes(from: number, to: number): Buffer {
+        const value = this._value.slice(from, to);
+        return value;
+    }
+
+    public setOffset(offsetInBytes: number): void {
+        this._offset = offsetInBytes;
+    }
+
+    public startScope(): void {
+        this._scopes.pushFront(this._offset);
+    }
+
+    public endScope(): void {
+        this._scopes.popFront();
+    }
+
+    public getOffset(): number {
+        return this._offset;
+    }
+
+    public toAbsoluteOffset(relativeOffset: number): number {
+        const scopeOffset = this._scopes.peekFront();
+        if (_.isUndefined(scopeOffset)) {
+            throw new Error(`Tried to access undefined scope.`);
+        }
+        const absoluteOffset = relativeOffset + scopeOffset;
+        return absoluteOffset;
+    }
+
+    public getSelector(): string {
+        return this._selector;
+    }
+}
diff --git a/packages/utils/src/abi_encoder/evm_data_type_factory.ts b/packages/utils/src/abi_encoder/evm_data_type_factory.ts
new file mode 100644
index 000000000..4cc124e0a
--- /dev/null
+++ b/packages/utils/src/abi_encoder/evm_data_type_factory.ts
@@ -0,0 +1,132 @@
+/* tslint:disable max-classes-per-file */
+import { DataItem, MethodAbi } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { DataType } from './abstract_data_types/data_type';
+import { DataTypeFactory } from './abstract_data_types/interfaces';
+import { AddressDataType } from './evm_data_types/address';
+import { ArrayDataType } from './evm_data_types/array';
+import { BoolDataType } from './evm_data_types/bool';
+import { DynamicBytesDataType } from './evm_data_types/dynamic_bytes';
+import { IntDataType } from './evm_data_types/int';
+import { MethodDataType } from './evm_data_types/method';
+import { PointerDataType } from './evm_data_types/pointer';
+import { StaticBytesDataType } from './evm_data_types/static_bytes';
+import { StringDataType } from './evm_data_types/string';
+import { TupleDataType } from './evm_data_types/tuple';
+import { UIntDataType } from './evm_data_types/uint';
+
+export class Address extends AddressDataType {
+    public constructor(dataItem: DataItem) {
+        super(dataItem, EvmDataTypeFactory.getInstance());
+    }
+}
+
+export class Bool extends BoolDataType {
+    public constructor(dataItem: DataItem) {
+        super(dataItem, EvmDataTypeFactory.getInstance());
+    }
+}
+
+export class Int extends IntDataType {
+    public constructor(dataItem: DataItem) {
+        super(dataItem, EvmDataTypeFactory.getInstance());
+    }
+}
+
+export class UInt extends UIntDataType {
+    public constructor(dataItem: DataItem) {
+        super(dataItem, EvmDataTypeFactory.getInstance());
+    }
+}
+
+export class StaticBytes extends StaticBytesDataType {
+    public constructor(dataItem: DataItem) {
+        super(dataItem, EvmDataTypeFactory.getInstance());
+    }
+}
+
+export class DynamicBytes extends DynamicBytesDataType {
+    public constructor(dataItem: DataItem) {
+        super(dataItem, EvmDataTypeFactory.getInstance());
+    }
+}
+
+export class String extends StringDataType {
+    public constructor(dataItem: DataItem) {
+        super(dataItem, EvmDataTypeFactory.getInstance());
+    }
+}
+
+export class Pointer extends PointerDataType {
+    public constructor(destDataType: DataType, parentDataType: DataType) {
+        super(destDataType, parentDataType, EvmDataTypeFactory.getInstance());
+    }
+}
+
+export class Tuple extends TupleDataType {
+    public constructor(dataItem: DataItem) {
+        super(dataItem, EvmDataTypeFactory.getInstance());
+    }
+}
+
+export class Array extends ArrayDataType {
+    public constructor(dataItem: DataItem) {
+        super(dataItem, EvmDataTypeFactory.getInstance());
+    }
+}
+
+export class Method extends MethodDataType {
+    public constructor(abi: MethodAbi) {
+        super(abi, EvmDataTypeFactory.getInstance());
+    }
+}
+
+/* tslint:disable no-construct */
+export class EvmDataTypeFactory implements DataTypeFactory {
+    private static _instance: DataTypeFactory;
+
+    public static getInstance(): DataTypeFactory {
+        if (!EvmDataTypeFactory._instance) {
+            EvmDataTypeFactory._instance = new EvmDataTypeFactory();
+        }
+        return EvmDataTypeFactory._instance;
+    }
+
+    /* tslint:disable prefer-function-over-method */
+    public create(dataItem: DataItem, parentDataType?: DataType): DataType {
+        // Create data type
+        let dataType: undefined | DataType;
+        if (Array.matchType(dataItem.type)) {
+            dataType = new Array(dataItem);
+        } else if (Address.matchType(dataItem.type)) {
+            dataType = new Address(dataItem);
+        } else if (Bool.matchType(dataItem.type)) {
+            dataType = new Bool(dataItem);
+        } else if (Int.matchType(dataItem.type)) {
+            dataType = new Int(dataItem);
+        } else if (UInt.matchType(dataItem.type)) {
+            dataType = new UInt(dataItem);
+        } else if (StaticBytes.matchType(dataItem.type)) {
+            dataType = new StaticBytes(dataItem);
+        } else if (Tuple.matchType(dataItem.type)) {
+            dataType = new Tuple(dataItem);
+        } else if (DynamicBytes.matchType(dataItem.type)) {
+            dataType = new DynamicBytes(dataItem);
+        } else if (String.matchType(dataItem.type)) {
+            dataType = new String(dataItem);
+        }
+        // @TODO: DataTypeement Fixed/UFixed types
+        if (_.isUndefined(dataType)) {
+            throw new Error(`Unrecognized data type: '${dataItem.type}'`);
+        } else if (!_.isUndefined(parentDataType) && !dataType.isStatic()) {
+            const pointerToDataType = new Pointer(dataType, parentDataType);
+            return pointerToDataType;
+        }
+        return dataType;
+    }
+    /* tslint:enable prefer-function-over-method */
+
+    private constructor() {}
+}
+/* tslint:enable no-construct */
diff --git a/packages/utils/src/abi_encoder/evm_data_types/address.ts b/packages/utils/src/abi_encoder/evm_data_types/address.ts
new file mode 100644
index 000000000..88846b1fa
--- /dev/null
+++ b/packages/utils/src/abi_encoder/evm_data_types/address.ts
@@ -0,0 +1,49 @@
+import { DataItem, SolidityTypes } from 'ethereum-types';
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
+
+import { DataTypeFactory } from '../abstract_data_types/interfaces';
+import { AbstractBlobDataType } from '../abstract_data_types/types/blob';
+import { RawCalldata } from '../calldata/raw_calldata';
+import { constants } from '../utils/constants';
+
+export class AddressDataType extends AbstractBlobDataType {
+    private static readonly _SIZE_KNOWN_AT_COMPILE_TIME: boolean = true;
+    private static readonly _ADDRESS_SIZE_IN_BYTES = 20;
+    private static readonly _DECODED_ADDRESS_OFFSET_IN_BYTES = constants.EVM_WORD_WIDTH_IN_BYTES -
+    AddressDataType._ADDRESS_SIZE_IN_BYTES;
+
+    public static matchType(type: string): boolean {
+        return type === SolidityTypes.Address;
+    }
+
+    public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
+        super(dataItem, dataTypeFactory, AddressDataType._SIZE_KNOWN_AT_COMPILE_TIME);
+        if (!AddressDataType.matchType(dataItem.type)) {
+            throw new Error(`Tried to instantiate Address with bad input: ${dataItem}`);
+        }
+    }
+
+    // Disable prefer-function-over-method for inherited abstract methods.
+    /* tslint:disable prefer-function-over-method */
+    public encodeValue(value: string): Buffer {
+        if (!ethUtil.isValidAddress(value)) {
+            throw new Error(`Invalid address: '${value}'`);
+        }
+        const valueBuf = ethUtil.toBuffer(value);
+        const encodedValueBuf = ethUtil.setLengthLeft(valueBuf, constants.EVM_WORD_WIDTH_IN_BYTES);
+        return encodedValueBuf;
+    }
+
+    public decodeValue(calldata: RawCalldata): string {
+        const valueBufPadded = calldata.popWord();
+        const valueBuf = valueBufPadded.slice(AddressDataType._DECODED_ADDRESS_OFFSET_IN_BYTES);
+        const value = ethUtil.bufferToHex(valueBuf);
+        return value;
+    }
+
+    public getSignature(): string {
+        return SolidityTypes.Address;
+    }
+    /* tslint:enable prefer-function-over-method */
+}
diff --git a/packages/utils/src/abi_encoder/evm_data_types/array.ts b/packages/utils/src/abi_encoder/evm_data_types/array.ts
new file mode 100644
index 000000000..7595cb667
--- /dev/null
+++ b/packages/utils/src/abi_encoder/evm_data_types/array.ts
@@ -0,0 +1,64 @@
+import { DataItem } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { DataTypeFactory } from '../abstract_data_types/interfaces';
+import { AbstractSetDataType } from '../abstract_data_types/types/set';
+import { constants } from '../utils/constants';
+
+export class ArrayDataType extends AbstractSetDataType {
+    private static readonly _MATCHER = RegExp('^(.+)\\[([0-9]*)\\]$');
+    private readonly _arraySignature: string;
+    private readonly _elementType: string;
+
+    public static matchType(type: string): boolean {
+        return ArrayDataType._MATCHER.test(type);
+    }
+
+    private static _decodeElementTypeAndLengthFromType(type: string): [string, undefined | number] {
+        const matches = ArrayDataType._MATCHER.exec(type);
+        if (_.isNull(matches) || matches.length !== 3) {
+            throw new Error(`Could not parse array: ${type}`);
+        } else if (_.isUndefined(matches[1])) {
+            throw new Error(`Could not parse array type: ${type}`);
+        } else if (_.isUndefined(matches[2])) {
+            throw new Error(`Could not parse array length: ${type}`);
+        }
+        const arrayElementType = matches[1];
+        const arrayLength = _.isEmpty(matches[2]) ? undefined : parseInt(matches[2], constants.DEC_BASE);
+        return [arrayElementType, arrayLength];
+    }
+
+    public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
+        // Construct parent
+        const isArray = true;
+        const [arrayElementType, arrayLength] = ArrayDataType._decodeElementTypeAndLengthFromType(dataItem.type);
+        super(dataItem, dataTypeFactory, isArray, arrayLength, arrayElementType);
+        // Set array properties
+        this._elementType = arrayElementType;
+        this._arraySignature = this._computeSignature();
+    }
+
+    public getSignature(): string {
+        return this._arraySignature;
+    }
+
+    private _computeSignature(): string {
+        // Compute signature for a single array element
+        const elementDataItem: DataItem = {
+            type: this._elementType,
+            name: 'N/A',
+        };
+        const elementComponents = this.getDataItem().components;
+        if (!_.isUndefined(elementComponents)) {
+            elementDataItem.components = elementComponents;
+        }
+        const elementDataType = this.getFactory().create(elementDataItem);
+        const elementSignature = elementDataType.getSignature();
+        // Construct signature for array of type `element`
+        if (_.isUndefined(this._arrayLength)) {
+            return `${elementSignature}[]`;
+        } else {
+            return `${elementSignature}[${this._arrayLength}]`;
+        }
+    }
+}
diff --git a/packages/utils/src/abi_encoder/evm_data_types/bool.ts b/packages/utils/src/abi_encoder/evm_data_types/bool.ts
new file mode 100644
index 000000000..d713d5a94
--- /dev/null
+++ b/packages/utils/src/abi_encoder/evm_data_types/bool.ts
@@ -0,0 +1,53 @@
+import { DataItem, SolidityTypes } from 'ethereum-types';
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
+
+import { BigNumber } from '../../configured_bignumber';
+import { DataTypeFactory } from '../abstract_data_types/interfaces';
+import { AbstractBlobDataType } from '../abstract_data_types/types/blob';
+import { RawCalldata } from '../calldata/raw_calldata';
+import { constants } from '../utils/constants';
+
+export class BoolDataType extends AbstractBlobDataType {
+    private static readonly _SIZE_KNOWN_AT_COMPILE_TIME: boolean = true;
+
+    public static matchType(type: string): boolean {
+        return type === SolidityTypes.Bool;
+    }
+
+    public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
+        super(dataItem, dataTypeFactory, BoolDataType._SIZE_KNOWN_AT_COMPILE_TIME);
+        if (!BoolDataType.matchType(dataItem.type)) {
+            throw new Error(`Tried to instantiate Bool with bad input: ${dataItem}`);
+        }
+    }
+
+    // Disable prefer-function-over-method for inherited abstract methods.
+    /* tslint:disable prefer-function-over-method */
+    public encodeValue(value: boolean): Buffer {
+        const encodedValue = value ? '0x1' : '0x0';
+        const encodedValueBuf = ethUtil.setLengthLeft(
+            ethUtil.toBuffer(encodedValue),
+            constants.EVM_WORD_WIDTH_IN_BYTES,
+        );
+        return encodedValueBuf;
+    }
+
+    public decodeValue(calldata: RawCalldata): boolean {
+        const valueBuf = calldata.popWord();
+        const valueHex = ethUtil.bufferToHex(valueBuf);
+        const valueNumber = new BigNumber(valueHex, constants.HEX_BASE);
+        if (!(valueNumber.equals(0) || valueNumber.equals(1))) {
+            throw new Error(`Failed to decode boolean. Expected 0x0 or 0x1, got ${valueHex}`);
+        }
+        /* tslint:disable boolean-naming */
+        const value: boolean = !valueNumber.equals(0);
+        /* tslint:enable boolean-naming */
+        return value;
+    }
+
+    public getSignature(): string {
+        return SolidityTypes.Bool;
+    }
+    /* tslint:enable prefer-function-over-method */
+}
diff --git a/packages/utils/src/abi_encoder/evm_data_types/dynamic_bytes.ts b/packages/utils/src/abi_encoder/evm_data_types/dynamic_bytes.ts
new file mode 100644
index 000000000..5277efd6c
--- /dev/null
+++ b/packages/utils/src/abi_encoder/evm_data_types/dynamic_bytes.ts
@@ -0,0 +1,72 @@
+import { DataItem, SolidityTypes } from 'ethereum-types';
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
+
+import { DataTypeFactory } from '../abstract_data_types/interfaces';
+import { AbstractBlobDataType } from '../abstract_data_types/types/blob';
+import { RawCalldata } from '../calldata/raw_calldata';
+import { constants } from '../utils/constants';
+
+export class DynamicBytesDataType extends AbstractBlobDataType {
+    private static readonly _SIZE_KNOWN_AT_COMPILE_TIME: boolean = false;
+
+    public static matchType(type: string): boolean {
+        return type === SolidityTypes.Bytes;
+    }
+
+    private static _sanityCheckValue(value: string | Buffer): void {
+        if (typeof value !== 'string') {
+            return;
+        }
+        if (!_.startsWith(value, '0x')) {
+            throw new Error(`Tried to encode non-hex value. Value must inlcude '0x' prefix.`);
+        } else if (value.length % 2 !== 0) {
+            throw new Error(`Tried to assign ${value}, which is contains a half-byte. Use full bytes only.`);
+        }
+    }
+
+    public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
+        super(dataItem, dataTypeFactory, DynamicBytesDataType._SIZE_KNOWN_AT_COMPILE_TIME);
+        if (!DynamicBytesDataType.matchType(dataItem.type)) {
+            throw new Error(`Tried to instantiate Dynamic Bytes with bad input: ${dataItem}`);
+        }
+    }
+
+    // Disable prefer-function-over-method for inherited abstract methods.
+    /* tslint:disable prefer-function-over-method */
+    public encodeValue(value: string | Buffer): Buffer {
+        // Encoded value is of the form: <length><value>, with each field padded to be word-aligned.
+        // 1/3 Construct the length
+        const valueBuf = ethUtil.toBuffer(value);
+        const wordsToStoreValuePadded = Math.ceil(valueBuf.byteLength / constants.EVM_WORD_WIDTH_IN_BYTES);
+        const bytesToStoreValuePadded = wordsToStoreValuePadded * constants.EVM_WORD_WIDTH_IN_BYTES;
+        const lengthBuf = ethUtil.toBuffer(valueBuf.byteLength);
+        const lengthBufPadded = ethUtil.setLengthLeft(lengthBuf, constants.EVM_WORD_WIDTH_IN_BYTES);
+        // 2/3 Construct the value
+        DynamicBytesDataType._sanityCheckValue(value);
+        const valueBufPadded = ethUtil.setLengthRight(valueBuf, bytesToStoreValuePadded);
+        // 3/3 Combine length and value
+        const encodedValue = Buffer.concat([lengthBufPadded, valueBufPadded]);
+        return encodedValue;
+    }
+
+    public decodeValue(calldata: RawCalldata): string {
+        // Encoded value is of the form: <length><value>, with each field padded to be word-aligned.
+        // 1/2 Decode length
+        const lengthBuf = calldata.popWord();
+        const lengthHex = ethUtil.bufferToHex(lengthBuf);
+        const length = parseInt(lengthHex, constants.HEX_BASE);
+        // 2/2 Decode value
+        const wordsToStoreValuePadded = Math.ceil(length / constants.EVM_WORD_WIDTH_IN_BYTES);
+        const valueBufPadded = calldata.popWords(wordsToStoreValuePadded);
+        const valueBuf = valueBufPadded.slice(0, length);
+        const value = ethUtil.bufferToHex(valueBuf);
+        DynamicBytesDataType._sanityCheckValue(value);
+        return value;
+    }
+
+    public getSignature(): string {
+        return SolidityTypes.Bytes;
+    }
+    /* tslint:enable prefer-function-over-method */
+}
diff --git a/packages/utils/src/abi_encoder/evm_data_types/int.ts b/packages/utils/src/abi_encoder/evm_data_types/int.ts
new file mode 100644
index 000000000..f1dcf5ea1
--- /dev/null
+++ b/packages/utils/src/abi_encoder/evm_data_types/int.ts
@@ -0,0 +1,59 @@
+import { DataItem, SolidityTypes } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { BigNumber } from '../../configured_bignumber';
+import { DataTypeFactory } from '../abstract_data_types/interfaces';
+import { AbstractBlobDataType } from '../abstract_data_types/types/blob';
+import { RawCalldata } from '../calldata/raw_calldata';
+import { constants } from '../utils/constants';
+import * as EncoderMath from '../utils/math';
+
+export class IntDataType extends AbstractBlobDataType {
+    private static readonly _MATCHER = RegExp(
+        '^int(8|16|24|32|40|48|56|64|72|88|96|104|112|120|128|136|144|152|160|168|176|184|192|200|208|216|224|232|240|248|256){0,1}$',
+    );
+    private static readonly _SIZE_KNOWN_AT_COMPILE_TIME: boolean = true;
+    private static readonly _MAX_WIDTH: number = 256;
+    private static readonly _DEFAULT_WIDTH: number = IntDataType._MAX_WIDTH;
+    private readonly _width: number;
+    private readonly _minValue: BigNumber;
+    private readonly _maxValue: BigNumber;
+
+    public static matchType(type: string): boolean {
+        return IntDataType._MATCHER.test(type);
+    }
+
+    private static _decodeWidthFromType(type: string): number {
+        const matches = IntDataType._MATCHER.exec(type);
+        const width =
+            !_.isNull(matches) && matches.length === 2 && !_.isUndefined(matches[1])
+                ? parseInt(matches[1], constants.DEC_BASE)
+                : IntDataType._DEFAULT_WIDTH;
+        return width;
+    }
+
+    public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
+        super(dataItem, dataTypeFactory, IntDataType._SIZE_KNOWN_AT_COMPILE_TIME);
+        if (!IntDataType.matchType(dataItem.type)) {
+            throw new Error(`Tried to instantiate Int with bad input: ${dataItem}`);
+        }
+        this._width = IntDataType._decodeWidthFromType(dataItem.type);
+        this._minValue = new BigNumber(2).toPower(this._width - 1).times(-1);
+        this._maxValue = new BigNumber(2).toPower(this._width - 1).sub(1);
+    }
+
+    public encodeValue(value: BigNumber | string | number): Buffer {
+        const encodedValue = EncoderMath.safeEncodeNumericValue(value, this._minValue, this._maxValue);
+        return encodedValue;
+    }
+
+    public decodeValue(calldata: RawCalldata): BigNumber {
+        const valueBuf = calldata.popWord();
+        const value = EncoderMath.safeDecodeNumericValue(valueBuf, this._minValue, this._maxValue);
+        return value;
+    }
+
+    public getSignature(): string {
+        return `${SolidityTypes.Int}${this._width}`;
+    }
+}
diff --git a/packages/utils/src/abi_encoder/evm_data_types/method.ts b/packages/utils/src/abi_encoder/evm_data_types/method.ts
new file mode 100644
index 000000000..b1cd1377f
--- /dev/null
+++ b/packages/utils/src/abi_encoder/evm_data_types/method.ts
@@ -0,0 +1,72 @@
+import { DataItem, MethodAbi } from 'ethereum-types';
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
+
+import { DataType } from '../abstract_data_types/data_type';
+import { DataTypeFactory } from '../abstract_data_types/interfaces';
+import { AbstractSetDataType } from '../abstract_data_types/types/set';
+import { constants } from '../utils/constants';
+import { DecodingRules, EncodingRules } from '../utils/rules';
+
+import { TupleDataType } from './tuple';
+
+export class MethodDataType extends AbstractSetDataType {
+    private readonly _methodSignature: string;
+    private readonly _methodSelector: string;
+    private readonly _returnDataType: DataType;
+
+    public constructor(abi: MethodAbi, dataTypeFactory: DataTypeFactory) {
+        const methodDataItem = { type: 'method', name: abi.name, components: abi.inputs };
+        super(methodDataItem, dataTypeFactory);
+        this._methodSignature = this._computeSignature();
+        this._methodSelector = this._computeSelector();
+        const returnDataItem: DataItem = { type: 'tuple', name: abi.name, components: abi.outputs };
+        this._returnDataType = new TupleDataType(returnDataItem, this.getFactory());
+    }
+
+    public encode(value: any, rules?: EncodingRules): string {
+        const calldata = super.encode(value, rules, this._methodSelector);
+        return calldata;
+    }
+
+    public decode(calldata: string, rules?: DecodingRules): any[] | object {
+        const value = super.decode(calldata, rules, this._methodSelector);
+        return value;
+    }
+
+    public encodeReturnValues(value: any, rules?: EncodingRules): string {
+        const returnData = this._returnDataType.encode(value, rules);
+        return returnData;
+    }
+
+    public decodeReturnValues(returndata: string, rules?: DecodingRules): any {
+        const returnValues = this._returnDataType.decode(returndata, rules);
+        return returnValues;
+    }
+
+    public getSignature(): string {
+        return this._methodSignature;
+    }
+
+    public getSelector(): string {
+        return this._methodSelector;
+    }
+
+    private _computeSignature(): string {
+        const memberSignature = this._computeSignatureOfMembers();
+        const methodSignature = `${this.getDataItem().name}${memberSignature}`;
+        return methodSignature;
+    }
+
+    private _computeSelector(): string {
+        const signature = this._computeSignature();
+        const selector = ethUtil.bufferToHex(
+            ethUtil.toBuffer(
+                ethUtil
+                    .sha3(signature)
+                    .slice(constants.HEX_SELECTOR_BYTE_OFFSET_IN_CALLDATA, constants.HEX_SELECTOR_LENGTH_IN_BYTES),
+            ),
+        );
+        return selector;
+    }
+}
diff --git a/packages/utils/src/abi_encoder/evm_data_types/pointer.ts b/packages/utils/src/abi_encoder/evm_data_types/pointer.ts
new file mode 100644
index 000000000..389e75927
--- /dev/null
+++ b/packages/utils/src/abi_encoder/evm_data_types/pointer.ts
@@ -0,0 +1,17 @@
+import { DataItem } from 'ethereum-types';
+
+import { DataType } from '../abstract_data_types/data_type';
+import { DataTypeFactory } from '../abstract_data_types/interfaces';
+import { AbstractPointerDataType } from '../abstract_data_types/types/pointer';
+
+export class PointerDataType extends AbstractPointerDataType {
+    constructor(destDataType: DataType, parentDataType: DataType, dataTypeFactory: DataTypeFactory) {
+        const destDataItem = destDataType.getDataItem();
+        const dataItem: DataItem = { name: `ptr<${destDataItem.name}>`, type: `ptr<${destDataItem.type}>` };
+        super(dataItem, dataTypeFactory, destDataType, parentDataType);
+    }
+
+    public getSignature(): string {
+        return this._destination.getSignature();
+    }
+}
diff --git a/packages/utils/src/abi_encoder/evm_data_types/static_bytes.ts b/packages/utils/src/abi_encoder/evm_data_types/static_bytes.ts
new file mode 100644
index 000000000..2e371c505
--- /dev/null
+++ b/packages/utils/src/abi_encoder/evm_data_types/static_bytes.ts
@@ -0,0 +1,78 @@
+import { DataItem, SolidityTypes } from 'ethereum-types';
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
+
+import { DataTypeFactory } from '../abstract_data_types/interfaces';
+import { AbstractBlobDataType } from '../abstract_data_types/types/blob';
+import { RawCalldata } from '../calldata/raw_calldata';
+import { constants } from '../utils/constants';
+
+export class StaticBytesDataType extends AbstractBlobDataType {
+    private static readonly _SIZE_KNOWN_AT_COMPILE_TIME: boolean = true;
+    private static readonly _MATCHER = RegExp(
+        '^(byte|bytes(1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|31|32))$',
+    );
+    private static readonly _DEFAULT_WIDTH = 1;
+    private readonly _width: number;
+
+    public static matchType(type: string): boolean {
+        return StaticBytesDataType._MATCHER.test(type);
+    }
+
+    private static _decodeWidthFromType(type: string): number {
+        const matches = StaticBytesDataType._MATCHER.exec(type);
+        const width =
+            !_.isNull(matches) && matches.length === 3 && !_.isUndefined(matches[2])
+                ? parseInt(matches[2], constants.DEC_BASE)
+                : StaticBytesDataType._DEFAULT_WIDTH;
+        return width;
+    }
+
+    public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
+        super(dataItem, dataTypeFactory, StaticBytesDataType._SIZE_KNOWN_AT_COMPILE_TIME);
+        if (!StaticBytesDataType.matchType(dataItem.type)) {
+            throw new Error(`Tried to instantiate Static Bytes with bad input: ${dataItem}`);
+        }
+        this._width = StaticBytesDataType._decodeWidthFromType(dataItem.type);
+    }
+
+    public getSignature(): string {
+        // Note that `byte` reduces to `bytes1`
+        return `${SolidityTypes.Bytes}${this._width}`;
+    }
+
+    public encodeValue(value: string | Buffer): Buffer {
+        // 1/2 Convert value into a buffer and do bounds checking
+        this._sanityCheckValue(value);
+        const valueBuf = ethUtil.toBuffer(value);
+        // 2/2 Store value as hex
+        const valuePadded = ethUtil.setLengthRight(valueBuf, constants.EVM_WORD_WIDTH_IN_BYTES);
+        return valuePadded;
+    }
+
+    public decodeValue(calldata: RawCalldata): string {
+        const valueBufPadded = calldata.popWord();
+        const valueBuf = valueBufPadded.slice(0, this._width);
+        const value = ethUtil.bufferToHex(valueBuf);
+        this._sanityCheckValue(value);
+        return value;
+    }
+
+    private _sanityCheckValue(value: string | Buffer): void {
+        if (typeof value === 'string') {
+            if (!_.startsWith(value, '0x')) {
+                throw new Error(`Tried to encode non-hex value. Value must inlcude '0x' prefix.`);
+            } else if (value.length % 2 !== 0) {
+                throw new Error(`Tried to assign ${value}, which is contains a half-byte. Use full bytes only.`);
+            }
+        }
+        const valueBuf = ethUtil.toBuffer(value);
+        if (valueBuf.byteLength > this._width) {
+            throw new Error(
+                `Tried to assign ${value} (${
+                    valueBuf.byteLength
+                } bytes), which exceeds max bytes that can be stored in a ${this.getSignature()}`,
+            );
+        }
+    }
+}
diff --git a/packages/utils/src/abi_encoder/evm_data_types/string.ts b/packages/utils/src/abi_encoder/evm_data_types/string.ts
new file mode 100644
index 000000000..91a72ad3f
--- /dev/null
+++ b/packages/utils/src/abi_encoder/evm_data_types/string.ts
@@ -0,0 +1,59 @@
+import { DataItem, SolidityTypes } from 'ethereum-types';
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
+
+import { DataTypeFactory } from '../abstract_data_types/interfaces';
+import { AbstractBlobDataType } from '../abstract_data_types/types/blob';
+import { RawCalldata } from '../calldata/raw_calldata';
+import { constants } from '../utils/constants';
+
+export class StringDataType extends AbstractBlobDataType {
+    private static readonly _SIZE_KNOWN_AT_COMPILE_TIME: boolean = false;
+
+    public static matchType(type: string): boolean {
+        return type === SolidityTypes.String;
+    }
+
+    public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
+        super(dataItem, dataTypeFactory, StringDataType._SIZE_KNOWN_AT_COMPILE_TIME);
+        if (!StringDataType.matchType(dataItem.type)) {
+            throw new Error(`Tried to instantiate String with bad input: ${dataItem}`);
+        }
+    }
+
+    // Disable prefer-function-over-method for inherited abstract methods.
+    /* tslint:disable prefer-function-over-method */
+    public encodeValue(value: string): Buffer {
+        // Encoded value is of the form: <length><value>, with each field padded to be word-aligned.
+        // 1/3 Construct the length
+        const wordsToStoreValuePadded = Math.ceil(value.length / constants.EVM_WORD_WIDTH_IN_BYTES);
+        const bytesToStoreValuePadded = wordsToStoreValuePadded * constants.EVM_WORD_WIDTH_IN_BYTES;
+        const lengthBuf = ethUtil.toBuffer(value.length);
+        const lengthBufPadded = ethUtil.setLengthLeft(lengthBuf, constants.EVM_WORD_WIDTH_IN_BYTES);
+        // 2/3 Construct the value
+        const valueBuf = new Buffer(value);
+        const valueBufPadded = ethUtil.setLengthRight(valueBuf, bytesToStoreValuePadded);
+        // 3/3 Combine length and value
+        const encodedValue = Buffer.concat([lengthBufPadded, valueBufPadded]);
+        return encodedValue;
+    }
+
+    public decodeValue(calldata: RawCalldata): string {
+        // Encoded value is of the form: <length><value>, with each field padded to be word-aligned.
+        // 1/2 Decode length
+        const lengthBufPadded = calldata.popWord();
+        const lengthHexPadded = ethUtil.bufferToHex(lengthBufPadded);
+        const length = parseInt(lengthHexPadded, constants.HEX_BASE);
+        // 2/2 Decode value
+        const wordsToStoreValuePadded = Math.ceil(length / constants.EVM_WORD_WIDTH_IN_BYTES);
+        const valueBufPadded = calldata.popWords(wordsToStoreValuePadded);
+        const valueBuf = valueBufPadded.slice(0, length);
+        const value = valueBuf.toString('ascii');
+        return value;
+    }
+
+    public getSignature(): string {
+        return SolidityTypes.String;
+    }
+    /* tslint:enable prefer-function-over-method */
+}
diff --git a/packages/utils/src/abi_encoder/evm_data_types/tuple.ts b/packages/utils/src/abi_encoder/evm_data_types/tuple.ts
new file mode 100644
index 000000000..31593c882
--- /dev/null
+++ b/packages/utils/src/abi_encoder/evm_data_types/tuple.ts
@@ -0,0 +1,24 @@
+import { DataItem, SolidityTypes } from 'ethereum-types';
+
+import { DataTypeFactory } from '../abstract_data_types/interfaces';
+import { AbstractSetDataType } from '../abstract_data_types/types/set';
+
+export class TupleDataType extends AbstractSetDataType {
+    private readonly _signature: string;
+
+    public static matchType(type: string): boolean {
+        return type === SolidityTypes.Tuple;
+    }
+
+    public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
+        super(dataItem, dataTypeFactory);
+        if (!TupleDataType.matchType(dataItem.type)) {
+            throw new Error(`Tried to instantiate Tuple with bad input: ${dataItem}`);
+        }
+        this._signature = this._computeSignatureOfMembers();
+    }
+
+    public getSignature(): string {
+        return this._signature;
+    }
+}
diff --git a/packages/utils/src/abi_encoder/evm_data_types/uint.ts b/packages/utils/src/abi_encoder/evm_data_types/uint.ts
new file mode 100644
index 000000000..5180f0cf3
--- /dev/null
+++ b/packages/utils/src/abi_encoder/evm_data_types/uint.ts
@@ -0,0 +1,58 @@
+import { DataItem, SolidityTypes } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { BigNumber } from '../../configured_bignumber';
+import { DataTypeFactory } from '../abstract_data_types/interfaces';
+import { AbstractBlobDataType } from '../abstract_data_types/types/blob';
+import { RawCalldata } from '../calldata/raw_calldata';
+import { constants } from '../utils/constants';
+import * as EncoderMath from '../utils/math';
+
+export class UIntDataType extends AbstractBlobDataType {
+    private static readonly _MATCHER = RegExp(
+        '^uint(8|16|24|32|40|48|56|64|72|88|96|104|112|120|128|136|144|152|160|168|176|184|192|200|208|216|224|232|240|248|256){0,1}$',
+    );
+    private static readonly _SIZE_KNOWN_AT_COMPILE_TIME: boolean = true;
+    private static readonly _MAX_WIDTH: number = 256;
+    private static readonly _DEFAULT_WIDTH: number = UIntDataType._MAX_WIDTH;
+    private static readonly _MIN_VALUE = new BigNumber(0);
+    private readonly _width: number;
+    private readonly _maxValue: BigNumber;
+
+    public static matchType(type: string): boolean {
+        return UIntDataType._MATCHER.test(type);
+    }
+
+    private static _decodeWidthFromType(type: string): number {
+        const matches = UIntDataType._MATCHER.exec(type);
+        const width =
+            !_.isNull(matches) && matches.length === 2 && !_.isUndefined(matches[1])
+                ? parseInt(matches[1], constants.DEC_BASE)
+                : UIntDataType._DEFAULT_WIDTH;
+        return width;
+    }
+
+    public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
+        super(dataItem, dataTypeFactory, UIntDataType._SIZE_KNOWN_AT_COMPILE_TIME);
+        if (!UIntDataType.matchType(dataItem.type)) {
+            throw new Error(`Tried to instantiate UInt with bad input: ${dataItem}`);
+        }
+        this._width = UIntDataType._decodeWidthFromType(dataItem.type);
+        this._maxValue = new BigNumber(2).toPower(this._width).sub(1);
+    }
+
+    public encodeValue(value: BigNumber | string | number): Buffer {
+        const encodedValue = EncoderMath.safeEncodeNumericValue(value, UIntDataType._MIN_VALUE, this._maxValue);
+        return encodedValue;
+    }
+
+    public decodeValue(calldata: RawCalldata): BigNumber {
+        const valueBuf = calldata.popWord();
+        const value = EncoderMath.safeDecodeNumericValue(valueBuf, UIntDataType._MIN_VALUE, this._maxValue);
+        return value;
+    }
+
+    public getSignature(): string {
+        return `${SolidityTypes.Uint}${this._width}`;
+    }
+}
diff --git a/packages/utils/src/abi_encoder/index.ts b/packages/utils/src/abi_encoder/index.ts
new file mode 100644
index 000000000..baf844ac6
--- /dev/null
+++ b/packages/utils/src/abi_encoder/index.ts
@@ -0,0 +1,14 @@
+export { EncodingRules, DecodingRules } from './utils/rules';
+export {
+    Address,
+    Array,
+    Bool,
+    DynamicBytes,
+    Int,
+    Method,
+    Pointer,
+    StaticBytes,
+    String,
+    Tuple,
+    UInt,
+} from './evm_data_type_factory';
diff --git a/packages/utils/src/abi_encoder/utils/constants.ts b/packages/utils/src/abi_encoder/utils/constants.ts
new file mode 100644
index 000000000..2f43ba04d
--- /dev/null
+++ b/packages/utils/src/abi_encoder/utils/constants.ts
@@ -0,0 +1,17 @@
+import { DecodingRules, EncodingRules } from './rules';
+
+export const constants = {
+    EVM_WORD_WIDTH_IN_BYTES: 32,
+    EVM_WORD_WIDTH_IN_BITS: 256,
+    HEX_BASE: 16,
+    DEC_BASE: 10,
+    BIN_BASE: 2,
+    HEX_SELECTOR_LENGTH_IN_CHARS: 10,
+    HEX_SELECTOR_LENGTH_IN_BYTES: 4,
+    HEX_SELECTOR_BYTE_OFFSET_IN_CALLDATA: 0,
+    // Disable no-object-literal-type-assertion so we can enforce cast
+    /* tslint:disable no-object-literal-type-assertion */
+    DEFAULT_DECODING_RULES: { structsAsObjects: false } as DecodingRules,
+    DEFAULT_ENCODING_RULES: { optimize: true, annotate: false } as EncodingRules,
+    /* tslint:enable no-object-literal-type-assertion */
+};
diff --git a/packages/utils/src/abi_encoder/utils/math.ts b/packages/utils/src/abi_encoder/utils/math.ts
new file mode 100644
index 000000000..d84983c5b
--- /dev/null
+++ b/packages/utils/src/abi_encoder/utils/math.ts
@@ -0,0 +1,111 @@
+import BigNumber from 'bignumber.js';
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
+
+import { constants } from '../utils/constants';
+
+function sanityCheckBigNumberRange(
+    value_: BigNumber | string | number,
+    minValue: BigNumber,
+    maxValue: BigNumber,
+): void {
+    const value = new BigNumber(value_, 10);
+    if (value.greaterThan(maxValue)) {
+        throw new Error(`Tried to assign value of ${value}, which exceeds max value of ${maxValue}`);
+    } else if (value.lessThan(minValue)) {
+        throw new Error(`Tried to assign value of ${value}, which exceeds min value of ${minValue}`);
+    }
+}
+function bigNumberToPaddedBuffer(value: BigNumber): Buffer {
+    const valueHex = `0x${value.toString(constants.HEX_BASE)}`;
+    const valueBuf = ethUtil.toBuffer(valueHex);
+    const valueBufPadded = ethUtil.setLengthLeft(valueBuf, constants.EVM_WORD_WIDTH_IN_BYTES);
+    return valueBufPadded;
+}
+/**
+ * Takes a numeric value and returns its ABI-encoded value
+ * @param value_    The value to encode.
+ * @return ABI Encoded value
+ */
+export function encodeNumericValue(value_: BigNumber | string | number): Buffer {
+    const value = new BigNumber(value_, 10);
+    // Case 1/2: value is non-negative
+    if (value.greaterThanOrEqualTo(0)) {
+        const encodedPositiveValue = bigNumberToPaddedBuffer(value);
+        return encodedPositiveValue;
+    }
+    // Case 2/2: Value is negative
+    // Use two's-complement to encode the value
+    // Step 1/3: Convert negative value to positive binary string
+    const valueBin = value.times(-1).toString(constants.BIN_BASE);
+    // Step 2/3: Invert binary value
+    let invertedValueBin = '1'.repeat(constants.EVM_WORD_WIDTH_IN_BITS - valueBin.length);
+    _.each(valueBin, (bit: string) => {
+        invertedValueBin += bit === '1' ? '0' : '1';
+    });
+    const invertedValue = new BigNumber(invertedValueBin, constants.BIN_BASE);
+    // Step 3/3: Add 1 to inverted value
+    const negativeValue = invertedValue.plus(1);
+    const encodedValue = bigNumberToPaddedBuffer(negativeValue);
+    return encodedValue;
+}
+/**
+ * Takes a numeric value and returns its ABI-encoded value.
+ * Performs an additional sanity check, given the min/max allowed value.
+ * @param value_    The value to encode.
+ * @return ABI Encoded value
+ */
+export function safeEncodeNumericValue(
+    value: BigNumber | string | number,
+    minValue: BigNumber,
+    maxValue: BigNumber,
+): Buffer {
+    sanityCheckBigNumberRange(value, minValue, maxValue);
+    const encodedValue = encodeNumericValue(value);
+    return encodedValue;
+}
+/**
+ * Takes an ABI-encoded numeric value and returns its decoded value as a BigNumber.
+ * @param encodedValue    The encoded numeric value.
+ * @param minValue        The minimum possible decoded value.
+ * @return ABI Decoded value
+ */
+export function decodeNumericValue(encodedValue: Buffer, minValue: BigNumber): BigNumber {
+    const valueHex = ethUtil.bufferToHex(encodedValue);
+    // Case 1/3: value is definitely non-negative because of numeric boundaries
+    const value = new BigNumber(valueHex, constants.HEX_BASE);
+    if (!minValue.lessThan(0)) {
+        return value;
+    }
+    // Case 2/3: value is non-negative because there is no leading 1 (encoded as two's-complement)
+    const valueBin = value.toString(constants.BIN_BASE);
+    const isValueNegative = valueBin.length === constants.EVM_WORD_WIDTH_IN_BITS && _.startsWith(valueBin[0], '1');
+    if (!isValueNegative) {
+        return value;
+    }
+    // Case 3/3: value is negative
+    // Step 1/3: Invert b inary value
+    let invertedValueBin = '';
+    _.each(valueBin, (bit: string) => {
+        invertedValueBin += bit === '1' ? '0' : '1';
+    });
+    const invertedValue = new BigNumber(invertedValueBin, constants.BIN_BASE);
+    // Step 2/3: Add 1 to inverted value
+    // The result is the two's-complement representation of the input value.
+    const positiveValue = invertedValue.plus(1);
+    // Step 3/3: Invert positive value to get the negative value
+    const negativeValue = positiveValue.times(-1);
+    return negativeValue;
+}
+/**
+ * Takes an ABI-encoded numeric value and returns its decoded value as a BigNumber.
+ * Performs an additional sanity check, given the min/max allowed value.
+ * @param encodedValue    The encoded numeric value.
+ * @param minValue        The minimum possible decoded value.
+ * @return ABI Decoded value
+ */
+export function safeDecodeNumericValue(encodedValue: Buffer, minValue: BigNumber, maxValue: BigNumber): BigNumber {
+    const value = decodeNumericValue(encodedValue, minValue);
+    sanityCheckBigNumberRange(value, minValue, maxValue);
+    return value;
+}
diff --git a/packages/utils/src/abi_encoder/utils/queue.ts b/packages/utils/src/abi_encoder/utils/queue.ts
new file mode 100644
index 000000000..53afb7e11
--- /dev/null
+++ b/packages/utils/src/abi_encoder/utils/queue.ts
@@ -0,0 +1,39 @@
+export class Queue<T> {
+    private _store: T[] = [];
+
+    public pushBack(val: T): void {
+        this._store.push(val);
+    }
+
+    public pushFront(val: T): void {
+        this._store.unshift(val);
+    }
+
+    public popFront(): T | undefined {
+        return this._store.shift();
+    }
+
+    public popBack(): T | undefined {
+        if (this._store.length === 0) {
+            return undefined;
+        }
+        const backElement = this._store.splice(-1, 1)[0];
+        return backElement;
+    }
+
+    public mergeBack(q: Queue<T>): void {
+        this._store = this._store.concat(q._store);
+    }
+
+    public mergeFront(q: Queue<T>): void {
+        this._store = q._store.concat(this._store);
+    }
+
+    public getStore(): T[] {
+        return this._store;
+    }
+
+    public peekFront(): T | undefined {
+        return this._store.length >= 0 ? this._store[0] : undefined;
+    }
+}
diff --git a/packages/utils/src/abi_encoder/utils/rules.ts b/packages/utils/src/abi_encoder/utils/rules.ts
new file mode 100644
index 000000000..31471e97a
--- /dev/null
+++ b/packages/utils/src/abi_encoder/utils/rules.ts
@@ -0,0 +1,8 @@
+export interface DecodingRules {
+    structsAsObjects: boolean;
+}
+
+export interface EncodingRules {
+    optimize?: boolean;
+    annotate?: boolean;
+}
diff --git a/packages/utils/src/index.ts b/packages/utils/src/index.ts
index 0723e5788..082aff6bb 100644
--- a/packages/utils/src/index.ts
+++ b/packages/utils/src/index.ts
@@ -10,3 +10,4 @@ export { NULL_BYTES } from './constants';
 export { errorUtils } from './error_utils';
 export { fetchAsync } from './fetch_async';
 export { signTypedDataUtils } from './sign_typed_data_utils';
+export import AbiEncoder = require('./abi_encoder');
diff --git a/packages/utils/test/abi_encoder/abi_samples/method_abis.ts b/packages/utils/test/abi_encoder/abi_samples/method_abis.ts
new file mode 100644
index 000000000..fc552c127
--- /dev/null
+++ b/packages/utils/test/abi_encoder/abi_samples/method_abis.ts
@@ -0,0 +1,780 @@
+/* tslint:disable max-file-line-count */
+import { MethodAbi } from 'ethereum-types';
+
+export const simpleAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'greg',
+            type: 'uint256',
+        },
+        {
+            name: 'gregStr',
+            type: 'string',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const stringAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'greg',
+            type: 'string[]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const GAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [
+                {
+                    name: 'a',
+                    type: 'uint256',
+                },
+                {
+                    name: 'b',
+                    type: 'string',
+                },
+                {
+                    name: 'e',
+                    type: 'bytes',
+                },
+                {
+                    name: 'f',
+                    type: 'address',
+                },
+            ],
+
+            name: 'f',
+            type: 'tuple',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const typesWithDefaultWidthsAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'someUint',
+            type: 'uint',
+        },
+        {
+            name: 'someInt',
+            type: 'int',
+        },
+        {
+            name: 'someByte',
+            type: 'byte',
+        },
+        {
+            name: 'someUint',
+            type: 'uint[]',
+        },
+        {
+            name: 'someInt',
+            type: 'int[]',
+        },
+        {
+            name: 'someByte',
+            type: 'byte[]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const multiDimensionalArraysStaticTypeAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'a',
+            type: 'uint8[][][]',
+        },
+        {
+            name: 'b',
+            type: 'uint8[][][2]',
+        },
+        {
+            name: 'c',
+            type: 'uint8[][2][]',
+        },
+        {
+            name: 'd',
+            type: 'uint8[2][][]',
+        },
+        {
+            name: 'e',
+            type: 'uint8[][2][2]',
+        },
+        {
+            name: 'f',
+            type: 'uint8[2][2][]',
+        },
+        {
+            name: 'g',
+            type: 'uint8[2][][2]',
+        },
+        {
+            name: 'h',
+            type: 'uint8[2][2][2]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const multiDimensionalArraysDynamicTypeAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'a',
+            type: 'string[][][]',
+        },
+        {
+            name: 'b',
+            type: 'string[][][2]',
+        },
+        {
+            name: 'c',
+            type: 'string[][2][]',
+        },
+        {
+            name: 'h',
+            type: 'string[2][2][2]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const dynamicTupleAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [
+                {
+                    name: 'someUint',
+                    type: 'uint256',
+                },
+                {
+                    name: 'someStr',
+                    type: 'string',
+                },
+            ],
+            name: 'order',
+            type: 'tuple',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const arrayOfStaticTuplesWithDefinedLengthAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [
+                {
+                    name: 'someUint',
+                    type: 'uint256',
+                },
+                {
+                    name: 'someUint2',
+                    type: 'uint256',
+                },
+            ],
+            name: 'order',
+            type: 'tuple[8]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const arrayOfStaticTuplesWithDynamicLengthAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [
+                {
+                    name: 'someUint',
+                    type: 'uint256',
+                },
+                {
+                    name: 'someUint2',
+                    type: 'uint256',
+                },
+            ],
+            name: 'order',
+            type: 'tuple[]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const arrayOfDynamicTuplesWithDefinedLengthAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [
+                {
+                    name: 'someUint',
+                    type: 'uint256',
+                },
+                {
+                    name: 'someString',
+                    type: 'string',
+                },
+            ],
+            name: 'order',
+            type: 'tuple[8]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const arrayOfDynamicTuplesWithUndefinedLengthAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [
+                {
+                    name: 'someUint',
+                    type: 'uint256',
+                },
+                {
+                    name: 'someString',
+                    type: 'string',
+                },
+            ],
+            name: 'order',
+            type: 'tuple[]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const arrayOfDynamicTuplesAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [
+                {
+                    name: 'someUint',
+                    type: 'uint256',
+                },
+                {
+                    name: 'someString',
+                    type: 'string',
+                },
+            ],
+            name: 'order',
+            type: 'tuple[]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const multidimensionalArrayOfDynamicTuplesAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [
+                {
+                    name: 'someUint',
+                    type: 'uint256',
+                },
+                {
+                    name: 'someString',
+                    type: 'string',
+                },
+            ],
+            name: 'order',
+            type: 'tuple[][2][]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const staticTupleAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [
+                {
+                    name: 'someUint1',
+                    type: 'uint256',
+                },
+                {
+                    name: 'someUint2',
+                    type: 'uint256',
+                },
+                {
+                    name: 'someUint3',
+                    type: 'uint256',
+                },
+                {
+                    name: 'someBool',
+                    type: 'bool',
+                },
+            ],
+            name: 'order',
+            type: 'tuple',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const staticArrayAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'someStaticArray',
+            type: 'uint8[3]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const staticArrayDynamicMembersAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'someStaticArray',
+            type: 'string[3]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const dynamicArrayDynamicMembersAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'someStaticArray',
+            type: 'string[]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const dynamicArrayStaticMembersAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'someStaticArray',
+            type: 'uint8[]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const largeFlatAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'someUInt256',
+            type: 'uint256',
+        },
+        {
+            name: 'someInt256',
+            type: 'int256',
+        },
+        {
+            name: 'someInt32',
+            type: 'int32',
+        },
+        {
+            name: 'someByte',
+            type: 'byte',
+        },
+        {
+            name: 'someBytes32',
+            type: 'bytes32',
+        },
+        {
+            name: 'someBytes',
+            type: 'bytes',
+        },
+        {
+            name: 'someString',
+            type: 'string',
+        },
+        {
+            name: 'someAddress',
+            type: 'address',
+        },
+        {
+            name: 'someBool',
+            type: 'bool',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const largeNestedAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'someStaticArray',
+            type: 'uint8[3]',
+        },
+        {
+            name: 'someStaticArrayWithDynamicMembers',
+            type: 'string[2]',
+        },
+        {
+            name: 'someDynamicArrayWithDynamicMembers',
+            type: 'bytes[]',
+        },
+        {
+            name: 'some2DArray',
+            type: 'string[][]',
+        },
+        {
+            name: 'someTuple',
+            type: 'tuple',
+            components: [
+                {
+                    name: 'someUint32',
+                    type: 'uint32',
+                },
+                {
+                    name: 'someStr',
+                    type: 'string',
+                },
+            ],
+        },
+        {
+            name: 'someTupleWithDynamicTypes',
+            type: 'tuple',
+            components: [
+                {
+                    name: 'someUint',
+                    type: 'uint256',
+                },
+                {
+                    name: 'someStr',
+                    type: 'string',
+                },
+                /*{
+                    name: 'someStrArray',
+                    type: 'string[]',
+                },*/
+                {
+                    name: 'someBytes',
+                    type: 'bytes',
+                },
+                {
+                    name: 'someAddress',
+                    type: 'address',
+                },
+            ],
+        },
+        {
+            name: 'someArrayOfTuplesWithDynamicTypes',
+            type: 'tuple[]',
+            components: [
+                {
+                    name: 'someUint',
+                    type: 'uint256',
+                },
+                {
+                    name: 'someStr',
+                    type: 'string',
+                },
+                /*{
+                    name: 'someStrArray',
+                    type: 'string[]',
+                },*/
+                {
+                    name: 'someBytes',
+                    type: 'bytes',
+                },
+                {
+                    name: 'someAddress',
+                    type: 'address',
+                },
+            ],
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const nestedTuples: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'firstTuple',
+            type: 'tuple[1]',
+            components: [
+                {
+                    name: 'someUint32',
+                    type: 'uint32',
+                },
+                {
+                    name: 'nestedTuple',
+                    type: 'tuple',
+                    components: [
+                        {
+                            name: 'someUint',
+                            type: 'uint256',
+                        },
+                        {
+                            name: 'someAddress',
+                            type: 'address',
+                        },
+                    ],
+                },
+            ],
+        },
+        {
+            name: 'secondTuple',
+            type: 'tuple[]',
+            components: [
+                {
+                    name: 'someUint',
+                    type: 'uint256',
+                },
+                {
+                    name: 'someStr',
+                    type: 'string',
+                },
+                {
+                    name: 'nestedTuple',
+                    type: 'tuple',
+                    components: [
+                        {
+                            name: 'someUint32',
+                            type: 'uint32',
+                        },
+                        {
+                            name: 'secondNestedTuple',
+                            type: 'tuple',
+                            components: [
+                                {
+                                    name: 'someUint',
+                                    type: 'uint256',
+                                },
+                                {
+                                    name: 'someStr',
+                                    type: 'string',
+                                },
+                                {
+                                    name: 'someBytes',
+                                    type: 'bytes',
+                                },
+                                {
+                                    name: 'someAddress',
+                                    type: 'address',
+                                },
+                            ],
+                        },
+                    ],
+                },
+                {
+                    name: 'someBytes',
+                    type: 'bytes',
+                },
+                {
+                    name: 'someAddress',
+                    type: 'address',
+                },
+            ],
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const simpleAbi2: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'someByte',
+            type: 'byte',
+        },
+        {
+            name: 'someBytes32',
+            type: 'bytes32',
+        },
+        {
+            name: 'someBytes',
+            type: 'bytes',
+        },
+        {
+            name: 'someString',
+            type: 'string',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const fillOrderAbi: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [
+                {
+                    name: 'makerAddress',
+                    type: 'address',
+                },
+                {
+                    name: 'takerAddress',
+                    type: 'address',
+                },
+                {
+                    name: 'feeRecipientAddress',
+                    type: 'address',
+                },
+                {
+                    name: 'senderAddress',
+                    type: 'address',
+                },
+                {
+                    name: 'makerAssetAmount',
+                    type: 'uint256',
+                },
+                {
+                    name: 'takerAssetAmount',
+                    type: 'uint256',
+                },
+                {
+                    name: 'makerFee',
+                    type: 'uint256',
+                },
+                {
+                    name: 'takerFee',
+                    type: 'uint256',
+                },
+                {
+                    name: 'expirationTimeSeconds',
+                    type: 'uint256',
+                },
+                {
+                    name: 'salt',
+                    type: 'uint256',
+                },
+                {
+                    name: 'makerAssetData',
+                    type: 'bytes',
+                },
+                {
+                    name: 'takerAssetData',
+                    type: 'bytes',
+                },
+            ],
+            name: 'order',
+            type: 'tuple',
+        },
+        {
+            name: 'takerAssetFillAmount',
+            type: 'uint256',
+        },
+        {
+            name: 'salt',
+            type: 'uint256',
+        },
+        {
+            name: 'orderSignature',
+            type: 'bytes',
+        },
+        {
+            name: 'takerSignature',
+            type: 'bytes',
+        },
+    ],
+    name: 'fillOrder',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
diff --git a/packages/utils/test/abi_encoder/abi_samples/optimizer_abis.ts b/packages/utils/test/abi_encoder/abi_samples/optimizer_abis.ts
new file mode 100644
index 000000000..7cfd7a118
--- /dev/null
+++ b/packages/utils/test/abi_encoder/abi_samples/optimizer_abis.ts
@@ -0,0 +1,340 @@
+/* tslint:disable max-file-line-count */
+import { MethodAbi } from 'ethereum-types';
+
+export const duplicateDynamicArraysWithStaticElements: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'array1',
+            type: 'uint[]',
+        },
+        {
+            name: 'array2',
+            type: 'uint[]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const duplicateDynamicArraysWithDynamicElements: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'array1',
+            type: 'string[]',
+        },
+        {
+            name: 'array2',
+            type: 'string[]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const duplicateStaticArraysWithStaticElements: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'array1',
+            type: 'uint[2]',
+        },
+        {
+            name: 'array2',
+            type: 'uint[2]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const duplicateStaticArraysWithDynamicElements: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'array1',
+            type: 'string[2]',
+        },
+        {
+            name: 'array2',
+            type: 'string[2]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const duplicateArrayElements: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'array',
+            type: 'string[]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const duplicateTupleFields: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [
+                {
+                    name: 'field1',
+                    type: 'string',
+                },
+                {
+                    name: 'field2',
+                    type: 'string',
+                },
+            ],
+            name: 'Tuple',
+            type: 'tuple',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const duplicateStrings: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'string1',
+            type: 'string',
+        },
+        {
+            name: 'string2',
+            type: 'string',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const duplicateBytes: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'bytes1',
+            type: 'bytes',
+        },
+        {
+            name: 'bytes2',
+            type: 'bytes',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const duplicateTuples: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [
+                {
+                    name: 'field1',
+                    type: 'string',
+                },
+                {
+                    name: 'field2',
+                    type: 'uint',
+                },
+            ],
+            name: 'Tuple',
+            type: 'tuple',
+        },
+        {
+            components: [
+                {
+                    name: 'field1',
+                    type: 'string',
+                },
+                {
+                    name: 'field2',
+                    type: 'uint',
+                },
+            ],
+            name: 'Tuple',
+            type: 'tuple',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const duplicateArraysNestedInTuples: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [
+                {
+                    name: 'field',
+                    type: 'uint[]',
+                },
+            ],
+            name: 'Tuple1',
+            type: 'tuple',
+        },
+        {
+            components: [
+                {
+                    name: 'field',
+                    type: 'uint[]',
+                },
+                {
+                    name: 'extraField',
+                    type: 'string',
+                },
+            ],
+            name: 'Tuple2',
+            type: 'tuple',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const duplicateTuplesNestedInTuples: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            components: [
+                {
+                    components: [
+                        {
+                            name: 'nestedField',
+                            type: 'string',
+                        },
+                    ],
+                    name: 'field',
+                    type: 'tuple',
+                },
+            ],
+            name: 'Tuple1',
+            type: 'tuple',
+        },
+        {
+            components: [
+                {
+                    components: [
+                        {
+                            name: 'nestedField',
+                            type: 'string',
+                        },
+                    ],
+                    name: 'field',
+                    type: 'tuple',
+                },
+                {
+                    name: 'extraField',
+                    type: 'string',
+                },
+            ],
+            name: 'Tuple1',
+            type: 'tuple',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const duplicateTwoDimensionalArrays: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'array1',
+            type: 'string[][]',
+        },
+        {
+            name: 'array2',
+            type: 'string[][]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const arrayElementsDuplicatedAsSeparateParameter: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'stringArray',
+            type: 'string[]',
+        },
+        {
+            name: 'string',
+            type: 'string',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const arrayElementsDuplicatedAsTupleFields: MethodAbi = {
+    constant: false,
+    inputs: [
+        {
+            name: 'uint8Array',
+            type: 'uint8[]',
+        },
+        {
+            components: [
+                {
+                    name: 'uint',
+                    type: 'uint',
+                },
+            ],
+            name: 'uintTuple',
+            type: 'tuple[]',
+        },
+    ],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
diff --git a/packages/utils/test/abi_encoder/abi_samples/return_value_abis.ts b/packages/utils/test/abi_encoder/abi_samples/return_value_abis.ts
new file mode 100644
index 000000000..ac2124011
--- /dev/null
+++ b/packages/utils/test/abi_encoder/abi_samples/return_value_abis.ts
@@ -0,0 +1,99 @@
+/* tslint:disable max-file-line-count */
+import { MethodAbi } from 'ethereum-types';
+
+export const noReturnValues: MethodAbi = {
+    constant: false,
+    inputs: [],
+    name: 'simpleFunction',
+    outputs: [],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const singleStaticReturnValue: MethodAbi = {
+    constant: false,
+    inputs: [],
+    name: 'simpleFunction',
+    outputs: [
+        {
+            name: 'Bytes4',
+            type: 'bytes4',
+        },
+    ],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const multipleStaticReturnValues: MethodAbi = {
+    constant: false,
+    inputs: [],
+    name: 'simpleFunction',
+    outputs: [
+        {
+            name: 'val1',
+            type: 'bytes4',
+        },
+        {
+            name: 'val2',
+            type: 'bytes4',
+        },
+    ],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const singleDynamicReturnValue: MethodAbi = {
+    constant: false,
+    inputs: [],
+    name: 'simpleFunction',
+    outputs: [
+        {
+            name: 'val',
+            type: 'bytes',
+        },
+    ],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const multipleDynamicReturnValues: MethodAbi = {
+    constant: false,
+    inputs: [],
+    name: 'simpleFunction',
+    outputs: [
+        {
+            name: 'val1',
+            type: 'bytes',
+        },
+        {
+            name: 'val2',
+            type: 'bytes',
+        },
+    ],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
+
+export const mixedStaticAndDynamicReturnValues: MethodAbi = {
+    constant: false,
+    inputs: [],
+    name: 'simpleFunction',
+    outputs: [
+        {
+            name: 'val1',
+            type: 'bytes4',
+        },
+        {
+            name: 'val2',
+            type: 'bytes',
+        },
+    ],
+    payable: false,
+    stateMutability: 'nonpayable',
+    type: 'function',
+};
diff --git a/packages/utils/test/abi_encoder/evm_data_types_test.ts b/packages/utils/test/abi_encoder/evm_data_types_test.ts
new file mode 100644
index 000000000..9ef80a560
--- /dev/null
+++ b/packages/utils/test/abi_encoder/evm_data_types_test.ts
@@ -0,0 +1,1007 @@
+/* tslint:disable max-file-line-count */
+import * as chai from 'chai';
+import * as ethUtil from 'ethereumjs-util';
+import 'mocha';
+
+import { AbiEncoder, BigNumber } from '../../src/';
+import { chaiSetup } from '../utils/chai_setup';
+
+chaiSetup.configure();
+const expect = chai.expect;
+
+describe('ABI Encoder: EVM Data Type Encoding/Decoding', () => {
+    const encodingRules: AbiEncoder.EncodingRules = { optimize: false }; // optimizer is tested separately.
+    describe('Array', () => {
+        it('Fixed size; Static elements', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'testArray', type: 'int[2]' };
+            const dataType = new AbiEncoder.Array(testDataItem);
+            // Construct args to be encoded
+            const args = [new BigNumber(5), new BigNumber(6)];
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x00000000000000000000000000000000000000000000000000000000000000050000000000000000000000000000000000000000000000000000000000000006';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Dynamic size; Static elements', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'testArray', type: 'int[]' };
+            const dataType = new AbiEncoder.Array(testDataItem);
+            // Construct args to be encoded
+            const args = [new BigNumber(5), new BigNumber(6)];
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000050000000000000000000000000000000000000000000000000000000000000006';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Fixed size; Dynamic elements', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'testArray', type: 'string[2]' };
+            const dataType = new AbiEncoder.Array(testDataItem);
+            // Construct args to be encoded
+            const args = ['Hello', 'world'];
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000548656c6c6f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005776f726c64000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Dynamic size; Dynamic elements', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'testArray', type: 'string[]' };
+            const dataType = new AbiEncoder.Array(testDataItem);
+            // Construct args to be encoded
+            const args = ['Hello', 'world'];
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000548656c6c6f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005776f726c64000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Dynamic Size; Multidimensional; Dynamic Elements', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'testArray', type: 'bytes[][]' };
+            const dataType = new AbiEncoder.Array(testDataItem);
+            // Construct args to be encoded
+            const array1 = ['0x01020304', '0x05060708', '0x09101112'];
+            const array2 = ['0x10111213', '0x14151617'];
+            const array3 = ['0x18192021'];
+            const args = [array1, array2, array3];
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x0000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000001a000000000000000000000000000000000000000000000000000000000000002800000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e000000000000000000000000000000000000000000000000000000000000000040102030400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000405060708000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004091011120000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000041011121300000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000414151617000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000041819202100000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Dynamic Size; Multidimensional; Static Elements', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'testArray', type: 'bytes4[][]' };
+            const dataType = new AbiEncoder.Array(testDataItem);
+            // Construct args to be encoded
+            const array1 = ['0x01020304', '0x05060708', '0x09101112'];
+            const array2 = ['0x10111213', '0x14151617'];
+            const array3 = ['0x18192021'];
+            const args = [array1, array2, array3];
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x0000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000e00000000000000000000000000000000000000000000000000000000000000140000000000000000000000000000000000000000000000000000000000000000301020304000000000000000000000000000000000000000000000000000000000506070800000000000000000000000000000000000000000000000000000000091011120000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000021011121300000000000000000000000000000000000000000000000000000000141516170000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011819202100000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Static Size; Multidimensional; Static Elements', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'testArray', type: 'bytes4[3][2]' };
+            const dataType = new AbiEncoder.Array(testDataItem);
+            // Construct args to be encoded
+            const array1 = ['0x01020304', '0x05060708', '0x09101112'];
+            const array2 = ['0x10111213', '0x14151617', '0x18192021'];
+            const args = [array1, array2];
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x010203040000000000000000000000000000000000000000000000000000000005060708000000000000000000000000000000000000000000000000000000000910111200000000000000000000000000000000000000000000000000000000101112130000000000000000000000000000000000000000000000000000000014151617000000000000000000000000000000000000000000000000000000001819202100000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Static Size; Multidimensional; Dynamic Elements', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'testArray', type: 'bytes[3][2]' };
+            const dataType = new AbiEncoder.Array(testDataItem);
+            // Construct args to be encoded
+            const array1 = ['0x01020304', '0x05060708', '0x09101112'];
+            const array2 = ['0x10111213', '0x14151617', '0x18192021'];
+            const args = [array1, array2];
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000160000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e0000000000000000000000000000000000000000000000000000000000000000401020304000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004050607080000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000040910111200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e0000000000000000000000000000000000000000000000000000000000000000410111213000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004141516170000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000041819202100000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Static size; Too Few Elements', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'testArray', type: 'string[3]' };
+            const dataType = new AbiEncoder.Array(testDataItem);
+            // Construct args to be encoded
+            const args = ['Hello', 'world'];
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw('Expected array of 3 elements, but got array of length 2');
+        });
+        it('Static size; Too Many Elements', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'testArray', type: 'string[1]' };
+            const dataType = new AbiEncoder.Array(testDataItem);
+            // Construct args to be encoded
+            const args = ['Hello', 'world'];
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw('Expected array of 1 elements, but got array of length 2');
+        });
+        it('Element Type Mismatch', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'testArray', type: 'uint[]' };
+            const dataType = new AbiEncoder.Array(testDataItem);
+            // Construct args to be encoded
+            const args = [new BigNumber(1), 'Bad Argument'];
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw();
+        });
+    });
+
+    describe('Tuple', () => {
+        it('Static elements only', async () => {
+            // Create DataType object
+            const testDataItem = {
+                name: 'Tuple',
+                type: 'tuple',
+                components: [{ name: 'field_1', type: 'int32' }, { name: 'field_2', type: 'bool' }],
+            };
+            const dataType = new AbiEncoder.Tuple(testDataItem);
+            // Construct args to be encoded
+            const args = { field_1: new BigNumber(-5), field_2: true };
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffb0000000000000000000000000000000000000000000000000000000000000001';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodingRules: AbiEncoder.DecodingRules = { structsAsObjects: true };
+            const decodedArgs = dataType.decode(encodedArgs, decodingRules);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Dynamic elements only', async () => {
+            // Create DataType object
+            const testDataItem = {
+                name: 'Tuple',
+                type: 'tuple',
+                components: [{ name: 'field_1', type: 'string' }, { name: 'field_2', type: 'bytes' }],
+            };
+            const dataType = new AbiEncoder.Tuple(testDataItem);
+            // Construct args to be encoded
+            const args = { field_1: 'Hello, World!', field_2: '0xabcdef0123456789' };
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000d48656c6c6f2c20576f726c6421000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008abcdef0123456789000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodingRules: AbiEncoder.DecodingRules = { structsAsObjects: true };
+            const decodedArgs = dataType.decode(encodedArgs, decodingRules);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Nested Static Array', async () => {
+            // Create DataType object
+            const testDataItem = {
+                name: 'Tuple',
+                type: 'tuple',
+                components: [{ name: 'field', type: 'uint[2]' }],
+            };
+            const dataType = new AbiEncoder.Tuple(testDataItem);
+            // Construct args to be encoded
+            const args = { field: [new BigNumber(1), new BigNumber(2)] };
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x00000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000002';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodingRules: AbiEncoder.DecodingRules = { structsAsObjects: true };
+            const decodedArgs = dataType.decode(encodedArgs, decodingRules);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Nested Dynamic Array', async () => {
+            // Create DataType object
+            const testDataItem = {
+                name: 'Tuple',
+                type: 'tuple',
+                components: [{ name: 'field', type: 'uint[]' }],
+            };
+            const dataType = new AbiEncoder.Tuple(testDataItem);
+            // Construct args to be encoded
+            const args = { field: [new BigNumber(1), new BigNumber(2)] };
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000002';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodingRules: AbiEncoder.DecodingRules = { structsAsObjects: true };
+            const decodedArgs = dataType.decode(encodedArgs, decodingRules);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Nested Static Multidimensional Array', async () => {
+            // Create DataType object
+            const testDataItem = {
+                name: 'Tuple',
+                type: 'tuple',
+                components: [{ name: 'field', type: 'bytes4[2][2]' }],
+            };
+            const dataType = new AbiEncoder.Tuple(testDataItem);
+            // Construct args to be encoded
+            const array1 = ['0x01020304', '0x05060708'];
+            const array2 = ['0x09101112', '0x13141516'];
+            const args = { field: [array1, array2] };
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x0102030400000000000000000000000000000000000000000000000000000000050607080000000000000000000000000000000000000000000000000000000009101112000000000000000000000000000000000000000000000000000000001314151600000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodingRules: AbiEncoder.DecodingRules = { structsAsObjects: true };
+            const decodedArgs = dataType.decode(encodedArgs, decodingRules);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Nested Dynamic Multidimensional Array', async () => {
+            // Create DataType object
+            const testDataItem = {
+                name: 'Tuple',
+                type: 'tuple',
+                components: [{ name: 'field', type: 'bytes[2][2]' }],
+            };
+            const dataType = new AbiEncoder.Tuple(testDataItem);
+            // Construct args to be encoded
+            const array1 = ['0x01020304', '0x05060708'];
+            const array2 = ['0x09101112', '0x13141516'];
+            const args = { field: [array1, array2] };
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000004010203040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000040506070800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000004091011120000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000041314151600000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodingRules: AbiEncoder.DecodingRules = { structsAsObjects: true };
+            const decodedArgs = dataType.decode(encodedArgs, decodingRules);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Static and dynamic elements mixed', async () => {
+            // Create DataType object
+            const testDataItem = {
+                name: 'Tuple',
+                type: 'tuple',
+                components: [
+                    { name: 'field_1', type: 'int32' },
+                    { name: 'field_2', type: 'string' },
+                    { name: 'field_3', type: 'bool' },
+                    { name: 'field_4', type: 'bytes' },
+                ],
+            };
+            const dataType = new AbiEncoder.Tuple(testDataItem);
+            // Construct args to be encoded
+            const args = {
+                field_1: new BigNumber(-5),
+                field_2: 'Hello, World!',
+                field_3: true,
+                field_4: '0xabcdef0123456789',
+            };
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '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';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodingRules: AbiEncoder.DecodingRules = { structsAsObjects: true };
+            const decodedArgs = dataType.decode(encodedArgs, decodingRules);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Missing Key', async () => {
+            // Create DataType object
+            const testDataItem = {
+                name: 'Tuple',
+                type: 'tuple',
+                components: [{ name: 'field_1', type: 'int32' }, { name: 'field_2', type: 'bool' }],
+            };
+            const dataType = new AbiEncoder.Tuple(testDataItem);
+            // Construct args to be encoded
+            const args = { field_1: new BigNumber(-5) };
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw('Could not assign tuple to object: missing keys field_2');
+        });
+        it('Bad Key', async () => {
+            // Create DataType object
+            const testDataItem = {
+                name: 'Tuple',
+                type: 'tuple',
+                components: [{ name: 'field_1', type: 'int32' }, { name: 'field_2', type: 'bool' }],
+            };
+            const dataType = new AbiEncoder.Tuple(testDataItem);
+            // Construct args to be encoded
+            const args = { unknown_field: new BigNumber(-5) };
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw("Could not assign tuple to object: unrecognized key 'unknown_field' in object Tuple");
+        });
+    });
+
+    describe('Address', () => {
+        it('Valid Address', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Address', type: 'address' };
+            const dataType = new AbiEncoder.Address(testDataItem);
+            // Construct args to be encoded
+            const args = '0xe41d2489571d322189246dafa5ebde1f4699f498';
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x000000000000000000000000e41d2489571d322189246dafa5ebde1f4699f498';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Invalid Address - input is not valid hex', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Address', type: 'address' };
+            const dataType = new AbiEncoder.Address(testDataItem);
+            // Construct args to be encoded
+            const args = 'e4';
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw(`Invalid address: '${args}'`);
+        });
+        it('Invalid Address - input is not 20 bytes', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Address', type: 'address' };
+            const dataType = new AbiEncoder.Address(testDataItem);
+            // Construct args to be encoded
+            const args = '0xe4';
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw(`Invalid address: '${args}'`);
+        });
+    });
+
+    describe('Bool', () => {
+        it('True', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Boolean', type: 'bool' };
+            const dataType = new AbiEncoder.Bool(testDataItem);
+            // Construct args to be encoded
+            const args = true;
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x0000000000000000000000000000000000000000000000000000000000000001';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('False', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Boolean', type: 'bool' };
+            const dataType = new AbiEncoder.Bool(testDataItem);
+            // Construct args to be encoded
+            const args = false;
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x0000000000000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+    });
+
+    describe('Integer', () => {
+        /* tslint:disable custom-no-magic-numbers */
+        const max256BitInteger = new BigNumber(2).pow(255).minus(1);
+        const min256BitInteger = new BigNumber(2).pow(255).times(-1);
+        const max32BitInteger = new BigNumber(2).pow(31).minus(1);
+        const min32BitInteger = new BigNumber(2).pow(31).times(-1);
+        /* tslint:enable custom-no-magic-numbers */
+
+        it('Int256 - Positive Base Case', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Integer (256)', type: 'int' };
+            const dataType = new AbiEncoder.Int(testDataItem);
+            // Construct args to be encoded
+            const args = new BigNumber(1);
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x0000000000000000000000000000000000000000000000000000000000000001';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Int256 - Negative Base Case', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Integer (256)', type: 'int' };
+            const dataType = new AbiEncoder.Int(testDataItem);
+            // Construct args to be encoded
+            const args = new BigNumber(-1);
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Int256 - Positive Value', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Integer (256)', type: 'int' };
+            const dataType = new AbiEncoder.Int(testDataItem);
+            // Construct args to be encoded
+            const args = max256BitInteger;
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Int256 - Negative Value', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Integer (256)', type: 'int' };
+            const dataType = new AbiEncoder.Int(testDataItem);
+            // Construct args to be encoded
+            const args = min256BitInteger;
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = `0x8000000000000000000000000000000000000000000000000000000000000000`;
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Int256 - Value too large', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Integer (256)', type: 'int' };
+            const dataType = new AbiEncoder.Int(testDataItem);
+            // Construct args to be encoded
+            const args = max256BitInteger.plus(1);
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw();
+        });
+        it('Int256 - Value too small', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Integer (256)', type: 'int' };
+            const dataType = new AbiEncoder.Int(testDataItem);
+            // Construct args to be encoded
+            const args = min256BitInteger.minus(1);
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw();
+        });
+        it('Int32 - Positive Base Case', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Integer (32)', type: 'int32' };
+            const dataType = new AbiEncoder.Int(testDataItem);
+            // Construct args to be encoded
+            const args = new BigNumber(1);
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x0000000000000000000000000000000000000000000000000000000000000001';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Int32 - Negative Base Case', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Integer (32)', type: 'int32' };
+            const dataType = new AbiEncoder.Int(testDataItem);
+            // Construct args to be encoded
+            const args = new BigNumber(-1);
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Int32 - Positive Value', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Integer (32)', type: 'int32' };
+            const dataType = new AbiEncoder.Int(testDataItem);
+            // Construct args to be encoded
+            const args = max32BitInteger;
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x000000000000000000000000000000000000000000000000000000007fffffff';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Int32 - Negative Value', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Integer (32)', type: 'int32' };
+            const dataType = new AbiEncoder.Int(testDataItem);
+            // Construct args to be encoded
+            const args = min32BitInteger;
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = `0xffffffffffffffffffffffffffffffffffffffffffffffffffffffff80000000`;
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Int32 - Value too large', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Integer (32)', type: 'int32' };
+            const dataType = new AbiEncoder.Int(testDataItem);
+            // Construct args to be encoded
+            const args = max32BitInteger.plus(1);
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw();
+        });
+        it('Int32 - Value too small', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Integer (32)', type: 'int32' };
+            const dataType = new AbiEncoder.Int(testDataItem);
+            // Construct args to be encoded
+            const args = min32BitInteger.minus(1);
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw();
+        });
+    });
+
+    describe('Unsigned Integer', () => {
+        /* tslint:disable custom-no-magic-numbers */
+        const max256BitUnsignedInteger = new BigNumber(2).pow(256).minus(1);
+        const min256BitUnsignedInteger = new BigNumber(0);
+        const max32BitUnsignedInteger = new BigNumber(2).pow(32).minus(1);
+        const min32BitUnsignedInteger = new BigNumber(0);
+        /* tslint:enable custom-no-magic-numbers */
+
+        it('UInt256 - Positive Base Case', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Unsigned Integer (256)', type: 'uint' };
+            const dataType = new AbiEncoder.UInt(testDataItem);
+            // Construct args to be encoded
+            const args = new BigNumber(1);
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x0000000000000000000000000000000000000000000000000000000000000001';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('UInt256 - Positive Value', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Unsigned Integer (256)', type: 'uint' };
+            const dataType = new AbiEncoder.UInt(testDataItem);
+            // Construct args to be encoded
+            const args = max256BitUnsignedInteger;
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('UInt256 - Zero Value', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Unsigned Integer (256)', type: 'uint' };
+            const dataType = new AbiEncoder.UInt(testDataItem);
+            // Construct args to be encoded
+            const args = min256BitUnsignedInteger;
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = `0x0000000000000000000000000000000000000000000000000000000000000000`;
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('UInt256 - Value too large', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Unsigned Integer (256)', type: 'uint' };
+            const dataType = new AbiEncoder.UInt(testDataItem);
+            // Construct args to be encoded
+            const args = max256BitUnsignedInteger.plus(1);
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw();
+        });
+        it('UInt256 - Value too small', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Unsigned Integer (256)', type: 'uint' };
+            const dataType = new AbiEncoder.UInt(testDataItem);
+            // Construct args to be encoded
+            const args = min256BitUnsignedInteger.minus(1);
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw();
+        });
+        it('UInt32 - Positive Base Case', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Unsigned Integer (32)', type: 'uint32' };
+            const dataType = new AbiEncoder.UInt(testDataItem);
+            // Construct args to be encoded
+            const args = new BigNumber(1);
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x0000000000000000000000000000000000000000000000000000000000000001';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('UInt32 - Positive Value', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Unsigned Integer (32)', type: 'uint32' };
+            const dataType = new AbiEncoder.UInt(testDataItem);
+            // Construct args to be encoded
+            const args = max32BitUnsignedInteger;
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x00000000000000000000000000000000000000000000000000000000ffffffff';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('UInt32 - Zero Value', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Unsigned Integer (32)', type: 'uint32' };
+            const dataType = new AbiEncoder.UInt(testDataItem);
+            // Construct args to be encoded
+            const args = min32BitUnsignedInteger;
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = `0x0000000000000000000000000000000000000000000000000000000000000000`;
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('UInt32 - Value too large', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Unsigned Integer (32)', type: 'uint32' };
+            const dataType = new AbiEncoder.UInt(testDataItem);
+            // Construct args to be encoded
+            const args = max32BitUnsignedInteger.plus(1);
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw();
+        });
+        it('UInt32 - Value too small', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Unsigned Integer (32)', type: 'uint32' };
+            const dataType = new AbiEncoder.UInt(testDataItem);
+            // Construct args to be encoded
+            const args = min32BitUnsignedInteger.minus(1);
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw();
+        });
+    });
+
+    describe('Static Bytes', () => {
+        it('Single Byte (byte)', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Static Byte', type: 'byte' };
+            const dataType = new AbiEncoder.StaticBytes(testDataItem);
+            // Construct args to be encoded
+            const args = '0x05';
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x0500000000000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Single Byte (bytes1)', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Static Bytes1', type: 'bytes1' };
+            const dataType = new AbiEncoder.StaticBytes(testDataItem);
+            // Construct args to be encoded
+            const args = '0x05';
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x0500000000000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('4 Bytes (bytes4)', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Static Bytes4', type: 'bytes4' };
+            const dataType = new AbiEncoder.StaticBytes(testDataItem);
+            // Construct args to be encoded
+            const args = '0x00010203';
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x0001020300000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('4 Bytes (bytes4); Encoder must pad input', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Static Bytes4', type: 'bytes4' };
+            const dataType = new AbiEncoder.StaticBytes(testDataItem);
+            // Construct args to be encoded
+            // Note: There will be padding because this is a bytes32 but we are only passing in 4 bytes.
+            const args = '0x1a18';
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x1a18000000000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            const paddedArgs = '0x1a180000';
+            expect(decodedArgs).to.be.deep.equal(paddedArgs);
+        });
+        it('32 Bytes (bytes32)', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Static Bytes32', type: 'bytes32' };
+            const dataType = new AbiEncoder.StaticBytes(testDataItem);
+            // Construct args to be encoded
+            const args = '0x0001020304050607080911121314151617181920212223242526272829303132';
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x0001020304050607080911121314151617181920212223242526272829303132';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('32 Bytes (bytes32); Encoder must pad input', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Static Bytes32', type: 'bytes32' };
+            const dataType = new AbiEncoder.StaticBytes(testDataItem);
+            // Construct args to be encoded
+            // Note: There will be padding because this is a bytes32 but we are only passing in 4 bytes.
+            const args = '0x1a18bf61';
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs = '0x1a18bf6100000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            const paddedArgs = '0x1a18bf6100000000000000000000000000000000000000000000000000000000';
+            expect(decodedArgs).to.be.deep.equal(paddedArgs);
+        });
+        it('Should throw when pass in too many bytes (bytes4)', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Static Bytes4', type: 'bytes4' };
+            const dataType = new AbiEncoder.StaticBytes(testDataItem);
+            // Construct args to be encoded
+            const args = '0x0102030405';
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw(
+                'Tried to assign 0x0102030405 (5 bytes), which exceeds max bytes that can be stored in a bytes4',
+            );
+        });
+        it('Should throw when pass in too many bytes (bytes32)', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Static Bytes32', type: 'bytes32' };
+            const dataType = new AbiEncoder.StaticBytes(testDataItem);
+            // Construct args to be encoded
+            const args = '0x010203040506070809101112131415161718192021222324252627282930313233';
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw(
+                'Tried to assign 0x010203040506070809101112131415161718192021222324252627282930313233 (33 bytes), which exceeds max bytes that can be stored in a bytes32',
+            );
+        });
+        it('Should throw when pass in bad hex (no 0x prefix)', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Static Bytes32', type: 'bytes32' };
+            const dataType = new AbiEncoder.StaticBytes(testDataItem);
+            // Construct args to be encoded
+            const args = '0102030405060708091011121314151617181920212223242526272829303132';
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw("Tried to encode non-hex value. Value must inlcude '0x' prefix.");
+        });
+        it('Should throw when pass in bad hex (include a half-byte)', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Static Bytes32', type: 'bytes32' };
+            const dataType = new AbiEncoder.StaticBytes(testDataItem);
+            // Construct args to be encoded
+            const args = '0x010';
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw('Tried to assign 0x010, which is contains a half-byte. Use full bytes only.');
+        });
+    });
+
+    describe('Dynamic Bytes', () => {
+        it('Fits into one EVM word', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Dynamic Bytes', type: 'bytes' };
+            const dataType = new AbiEncoder.DynamicBytes(testDataItem);
+            // Construct args to be encoded
+            // Note: There will be padding because this is a bytes32 but we are only passing in 4 bytes.
+            const args = '0x1a18bf61';
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x00000000000000000000000000000000000000000000000000000000000000041a18bf6100000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Spans multiple EVM words', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Dynamic Bytes', type: 'bytes' };
+            const dataType = new AbiEncoder.DynamicBytes(testDataItem);
+            // Construct args to be encoded
+            // Note: There will be padding because this is a bytes32 but we are only passing in 4 bytes.
+            const bytesLength = 40;
+            const args = '0x' + '61'.repeat(bytesLength);
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x000000000000000000000000000000000000000000000000000000000000002861616161616161616161616161616161616161616161616161616161616161616161616161616161000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Input as Buffer', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Dynamic Bytes', type: 'bytes' };
+            const dataType = new AbiEncoder.DynamicBytes(testDataItem);
+            // Construct args to be encoded
+            // Note: There will be padding because this is a bytes32 but we are only passing in 4 bytes.
+            const args = '0x1a18bf61';
+            const argsAsBuffer = ethUtil.toBuffer(args);
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(argsAsBuffer);
+            const expectedEncodedArgs =
+                '0x00000000000000000000000000000000000000000000000000000000000000041a18bf6100000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Should throw when pass in bad hex (no 0x prefix)', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Static Bytes', type: 'bytes' };
+            const dataType = new AbiEncoder.DynamicBytes(testDataItem);
+            // Construct args to be encoded
+            const args = '01';
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw("Tried to encode non-hex value. Value must inlcude '0x' prefix.");
+        });
+        it('Should throw when pass in bad hex (include a half-byte)', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'Static Bytes', type: 'bytes' };
+            const dataType = new AbiEncoder.DynamicBytes(testDataItem);
+            // Construct args to be encoded
+            const args = '0x010';
+            // Encode Args and validate result
+            expect(() => {
+                dataType.encode(args, encodingRules);
+            }).to.throw('Tried to assign 0x010, which is contains a half-byte. Use full bytes only.');
+        });
+    });
+
+    describe('String', () => {
+        it('Fits into one EVM word', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'String', type: 'string' };
+            const dataType = new AbiEncoder.String(testDataItem);
+            // Construct args to be encoded
+            // Note: There will be padding because this is a bytes32 but we are only passing in 4 bytes.
+            const args = 'five';
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x00000000000000000000000000000000000000000000000000000000000000046669766500000000000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('Spans multiple EVM words', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'String', type: 'string' };
+            const dataType = new AbiEncoder.String(testDataItem);
+            // Construct args to be encoded
+            // Note: There will be padding because this is a bytes32 but we are only passing in 4 bytes.
+            const bytesLength = 40;
+            const args = 'a'.repeat(bytesLength);
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x000000000000000000000000000000000000000000000000000000000000002861616161616161616161616161616161616161616161616161616161616161616161616161616161000000000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+        it('String that begins with 0x prefix', async () => {
+            // Create DataType object
+            const testDataItem = { name: 'String', type: 'string' };
+            const dataType = new AbiEncoder.String(testDataItem);
+            // Construct args to be encoded
+            // Note: There will be padding because this is a bytes32 but we are only passing in 4 bytes.
+            const strLength = 40;
+            const args = '0x' + 'a'.repeat(strLength);
+            // Encode Args and validate result
+            const encodedArgs = dataType.encode(args, encodingRules);
+            const expectedEncodedArgs =
+                '0x000000000000000000000000000000000000000000000000000000000000002a30786161616161616161616161616161616161616161616161616161616161616161616161616161616100000000000000000000000000000000000000000000';
+            expect(encodedArgs).to.be.equal(expectedEncodedArgs);
+            // Decode Encoded Args and validate result
+            const decodedArgs = dataType.decode(encodedArgs);
+            expect(decodedArgs).to.be.deep.equal(args);
+        });
+    });
+});
diff --git a/packages/utils/test/abi_encoder/methods_test.ts b/packages/utils/test/abi_encoder/methods_test.ts
new file mode 100644
index 000000000..837020883
--- /dev/null
+++ b/packages/utils/test/abi_encoder/methods_test.ts
@@ -0,0 +1,366 @@
+import * as chai from 'chai';
+import 'mocha';
+
+import { AbiEncoder, BigNumber } from '../../src/';
+import { chaiSetup } from '../utils/chai_setup';
+
+import * as AbiSamples from './abi_samples/method_abis';
+
+chaiSetup.configure();
+const expect = chai.expect;
+
+describe('ABI Encoder: Method Encoding / Decoding', () => {
+    const encodingRules: AbiEncoder.EncodingRules = { optimize: false }; // optimizer is tested separately.
+    it('Types with default widths', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(AbiSamples.typesWithDefaultWidthsAbi);
+        const args = [new BigNumber(1), new BigNumber(-1), '0x56', [new BigNumber(1)], [new BigNumber(-1)], ['0x56']];
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0x09f2b0c30000000000000000000000000000000000000000000000000000000000000001ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff560000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000c000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000140000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000001ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff00000000000000000000000000000000000000000000000000000000000000015600000000000000000000000000000000000000000000000000000000000000';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Array of Static Tuples (Array has defined length)', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(AbiSamples.arrayOfStaticTuplesWithDefinedLengthAbi);
+        let value = 0;
+        const arrayOfTuples = [];
+        const arrayOfTuplesLength = 8;
+        for (let i = 0; i < arrayOfTuplesLength; ++i) {
+            arrayOfTuples.push([new BigNumber(++value), new BigNumber(++value)]);
+        }
+        const args = [arrayOfTuples];
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0x9eb20969000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000050000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000700000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000009000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000b000000000000000000000000000000000000000000000000000000000000000c000000000000000000000000000000000000000000000000000000000000000d000000000000000000000000000000000000000000000000000000000000000e000000000000000000000000000000000000000000000000000000000000000f0000000000000000000000000000000000000000000000000000000000000010';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Array of Static Tuples (Array has dynamic length)', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(AbiSamples.arrayOfStaticTuplesWithDynamicLengthAbi);
+        let value = 0;
+        const arrayOfTuples = [];
+        const arrayOfTuplesLength = 8;
+        for (let i = 0; i < arrayOfTuplesLength; ++i) {
+            arrayOfTuples.push([new BigNumber(++value), new BigNumber(++value)]);
+        }
+        const args = [arrayOfTuples];
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0x63275d6e00000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000050000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000700000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000009000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000b000000000000000000000000000000000000000000000000000000000000000c000000000000000000000000000000000000000000000000000000000000000d000000000000000000000000000000000000000000000000000000000000000e000000000000000000000000000000000000000000000000000000000000000f0000000000000000000000000000000000000000000000000000000000000010';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Array of Dynamic Tuples (Array has defined length)', async () => {
+        // Generate Calldata
+        const method = new AbiEncoder.Method(AbiSamples.arrayOfDynamicTuplesWithDefinedLengthAbi);
+        let value = 0;
+        const arrayOfTuples = [];
+        const arrayOfTuplesLength = 8;
+        for (let i = 0; i < arrayOfTuplesLength; ++i) {
+            arrayOfTuples.push([new BigNumber(++value), new BigNumber(++value).toString()]);
+        }
+        const args = [arrayOfTuples];
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0xdeedb00f00000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000018000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000280000000000000000000000000000000000000000000000000000000000000030000000000000000000000000000000000000000000000000000000000000003800000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000048000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000132000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000013400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000500000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000001360000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000070000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000138000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000009000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000023130000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000b000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000023132000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000d000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000023134000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000f000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000023136000000000000000000000000000000000000000000000000000000000000';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Array of Dynamic Tuples (Array has dynamic length)', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(AbiSamples.arrayOfDynamicTuplesWithUndefinedLengthAbi);
+        let value = 0;
+        const arrayOfTuples = [];
+        const arrayOfTuplesLength = 8;
+        for (let i = 0; i < arrayOfTuplesLength; ++i) {
+            arrayOfTuples.push([new BigNumber(++value), new BigNumber(++value).toString()]);
+        }
+        const args = [arrayOfTuples];
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0x60c847fb000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000018000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000280000000000000000000000000000000000000000000000000000000000000030000000000000000000000000000000000000000000000000000000000000003800000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000048000000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000132000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000013400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000500000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000001360000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000070000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000138000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000009000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000023130000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000b000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000023132000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000d000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000023134000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000f000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000023136000000000000000000000000000000000000000000000000000000000000';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Multidimensional Arrays / Static Members', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(AbiSamples.multiDimensionalArraysStaticTypeAbi);
+        // Eight 3-dimensional arrays of uint8[2][2][2]
+        let value = 0;
+        const args = [];
+        const argsLength = 8;
+        for (let i = 0; i < argsLength; ++i) {
+            args.push([
+                [[new BigNumber(++value), new BigNumber(++value)], [new BigNumber(++value), new BigNumber(++value)]],
+                [[new BigNumber(++value), new BigNumber(++value)], [new BigNumber(++value), new BigNumber(++value)]],
+            ]);
+        }
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0xc2f47d6f00000000000000000000000000000000000000000000000000000000000001e00000000000000000000000000000000000000000000000000000000000000480000000000000000000000000000000000000000000000000000000000000070000000000000000000000000000000000000000000000000000000000000009600000000000000000000000000000000000000000000000000000000000000b000000000000000000000000000000000000000000000000000000000000000d400000000000000000000000000000000000000000000000000000000000000e600000000000000000000000000000000000000000000000000000000000000039000000000000000000000000000000000000000000000000000000000000003a000000000000000000000000000000000000000000000000000000000000003b000000000000000000000000000000000000000000000000000000000000003c000000000000000000000000000000000000000000000000000000000000003d000000000000000000000000000000000000000000000000000000000000003e000000000000000000000000000000000000000000000000000000000000003f00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000001600000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000300000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000050000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000070000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000001600000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000009000000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000b000000000000000000000000000000000000000000000000000000000000000c0000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000d000000000000000000000000000000000000000000000000000000000000000e0000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000f0000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000140000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000110000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000130000000000000000000000000000000000000000000000000000000000000014000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000001500000000000000000000000000000000000000000000000000000000000000160000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000001700000000000000000000000000000000000000000000000000000000000000180000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000e000000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000019000000000000000000000000000000000000000000000000000000000000001a000000000000000000000000000000000000000000000000000000000000001b000000000000000000000000000000000000000000000000000000000000001c0000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000001d000000000000000000000000000000000000000000000000000000000000001e000000000000000000000000000000000000000000000000000000000000001f000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000140000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000210000000000000000000000000000000000000000000000000000000000000022000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000230000000000000000000000000000000000000000000000000000000000000024000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000025000000000000000000000000000000000000000000000000000000000000002600000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000027000000000000000000000000000000000000000000000000000000000000002800000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000029000000000000000000000000000000000000000000000000000000000000002a000000000000000000000000000000000000000000000000000000000000002b000000000000000000000000000000000000000000000000000000000000002c000000000000000000000000000000000000000000000000000000000000002d000000000000000000000000000000000000000000000000000000000000002e000000000000000000000000000000000000000000000000000000000000002f0000000000000000000000000000000000000000000000000000000000000030000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000e00000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000003100000000000000000000000000000000000000000000000000000000000000320000000000000000000000000000000000000000000000000000000000000033000000000000000000000000000000000000000000000000000000000000003400000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000035000000000000000000000000000000000000000000000000000000000000003600000000000000000000000000000000000000000000000000000000000000370000000000000000000000000000000000000000000000000000000000000038';
+        expect(calldata).to.be.equal(expectedCalldata);
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Multidimensional Arrays / Dynamic Members', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(AbiSamples.multiDimensionalArraysDynamicTypeAbi);
+        // Eight 3-dimensional arrays of string[2][2][2]
+        let value = 0;
+        const args = [];
+        const argsLength = 4;
+        for (let i = 0; i < argsLength; ++i) {
+            args.push([
+                [
+                    [new BigNumber(++value).toString(), new BigNumber(++value).toString()],
+                    [new BigNumber(++value).toString(), new BigNumber(++value).toString()],
+                ],
+                [
+                    [new BigNumber(++value).toString(), new BigNumber(++value).toString()],
+                    [new BigNumber(++value).toString(), new BigNumber(++value).toString()],
+                ],
+            ]);
+        }
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0x81534ebd0000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000052000000000000000000000000000000000000000000000000000000000000009a00000000000000000000000000000000000000000000000000000000000000e00000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000260000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000131000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001320000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000013300000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000134000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000001200000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000001350000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000013600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000137000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001380000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000260000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000139000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002313000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000023131000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000231320000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000001200000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000002313300000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000023134000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000231350000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002313600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000024000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000231370000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002313800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000023139000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000232300000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000023231000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000232320000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000002323300000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000023234000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000232350000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002323600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000232370000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002323800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000002323900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000023330000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000002333100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000023332000000000000000000000000000000000000000000000000000000000000';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Fixed Length Array / Dynamic Members', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(AbiSamples.staticArrayDynamicMembersAbi);
+        const args = [['Brave', 'New', 'World']];
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0x243a6e6e0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e00000000000000000000000000000000000000000000000000000000000000005427261766500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000034e657700000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005576f726c64000000000000000000000000000000000000000000000000000000';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Fixed Length Array / Dynamic Members', async () => {
+        // Generaet calldata
+        const method = new AbiEncoder.Method(AbiSamples.staticArrayDynamicMembersAbi);
+        const args = [['Brave', 'New', 'World']];
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0x243a6e6e0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e00000000000000000000000000000000000000000000000000000000000000005427261766500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000034e657700000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005576f726c64000000000000000000000000000000000000000000000000000000';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Unfixed Length Array / Dynamic Members ABI', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(AbiSamples.dynamicArrayDynamicMembersAbi);
+        const args = [['Brave', 'New', 'World']];
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0x13e751a900000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e00000000000000000000000000000000000000000000000000000000000000005427261766500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000034e657700000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005576f726c64000000000000000000000000000000000000000000000000000000';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Unfixed Length Array / Static Members ABI', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(AbiSamples.dynamicArrayStaticMembersAbi);
+        const args = [[new BigNumber(127), new BigNumber(14), new BigNumber(54)]];
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0x4fc8a83300000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000007f000000000000000000000000000000000000000000000000000000000000000e0000000000000000000000000000000000000000000000000000000000000036';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Fixed Length Array / Static Members ABI', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(AbiSamples.staticArrayAbi);
+        const args = [[new BigNumber(127), new BigNumber(14), new BigNumber(54)]];
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0xf68ade72000000000000000000000000000000000000000000000000000000000000007f000000000000000000000000000000000000000000000000000000000000000e0000000000000000000000000000000000000000000000000000000000000036';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Array ABI', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(AbiSamples.stringAbi);
+        const args = [['five', 'six', 'seven']];
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0x13e751a900000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e000000000000000000000000000000000000000000000000000000000000000046669766500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000373697800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005736576656e000000000000000000000000000000000000000000000000000000';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Static Tuple', async () => {
+        // Generate calldata
+        // This is dynamic because it has dynamic members
+        const method = new AbiEncoder.Method(AbiSamples.staticTupleAbi);
+        const args = [[new BigNumber(5), new BigNumber(10), new BigNumber(15), false]];
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0xa9125e150000000000000000000000000000000000000000000000000000000000000005000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000f0000000000000000000000000000000000000000000000000000000000000000';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Dynamic Tuple (Array input)', async () => {
+        // Generate calldata
+        // This is dynamic because it has dynamic members
+        const method = new AbiEncoder.Method(AbiSamples.dynamicTupleAbi);
+        const args = [[new BigNumber(5), 'five']];
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0x5b998f3500000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000005000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000046669766500000000000000000000000000000000000000000000000000000000';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Dynamic Tuple (Object input)', async () => {
+        // Generate Calldata
+        // This is dynamic because it has dynamic members
+        const method = new AbiEncoder.Method(AbiSamples.dynamicTupleAbi);
+        const args = [[new BigNumber(5), 'five']];
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0x5b998f3500000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000005000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000046669766500000000000000000000000000000000000000000000000000000000';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Large, Flat ABI', async () => {
+        // Construct calldata
+        const method = new AbiEncoder.Method(AbiSamples.largeFlatAbi);
+        const args = [
+            new BigNumber(256745454),
+            new BigNumber(-256745454),
+            new BigNumber(434244),
+            '0x43',
+            '0x0001020304050607080911121314151617181920212223242526272829303132',
+            '0x0001020304050607080911121314151617181920212223242526272829303132080911121314151617181920212223242526272829303132',
+            'Little peter piper piped a piping pepper pot',
+            '0xe41d2489571d322189246dafa5ebde1f4699f498',
+            true,
+        ];
+        // Validate calldata
+        const calldata = method.encode(args, encodingRules);
+        const expectedCalldata =
+            '0x312d4d42000000000000000000000000000000000000000000000000000000000f4d9feefffffffffffffffffffffffffffffffffffffffffffffffffffffffff0b26012000000000000000000000000000000000000000000000000000000000006a0444300000000000000000000000000000000000000000000000000000000000000000102030405060708091112131415161718192021222324252627282930313200000000000000000000000000000000000000000000000000000000000001200000000000000000000000000000000000000000000000000000000000000180000000000000000000000000e41d2489571d322189246dafa5ebde1f4699f4980000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000003800010203040506070809111213141516171819202122232425262728293031320809111213141516171819202122232425262728293031320000000000000000000000000000000000000000000000000000000000000000000000000000002c4c6974746c65207065746572207069706572207069706564206120706970696e672070657070657220706f740000000000000000000000000000000000000000';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata);
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+    it('Large, Nested ABI', async () => {
+        // Construct Calldata
+        const method = new AbiEncoder.Method(AbiSamples.largeNestedAbi);
+        const someStaticArray = [new BigNumber(127), new BigNumber(14), new BigNumber(54)];
+        const someStaticArrayWithDynamicMembers = [
+            'the little piping piper piped a piping pipper papper',
+            'the kid knows how to write poems, what can I say -- I guess theres a lot I could say to try to fill this line with a lot of text.',
+        ];
+        const someDynamicArrayWithDynamicMembers = [
+            '0x38745637834987324827439287423897238947239847',
+            '0x7283472398237423984723984729847248927498748974284728947239487498749847874329423743492347329847239842374892374892374892347238947289478947489374289472894738942749823743298742389472389473289472389437249823749823742893472398',
+            '0x283473298473248923749238742398742398472894729843278942374982374892374892743982',
+        ];
+        const some2DArray = [
+            [
+                'some string',
+                'some another string',
+                'there are just too many stringsup in',
+                'here',
+                'yall ghonna make me lose my mind',
+            ],
+            [
+                'the little piping piper piped a piping pipper papper',
+                'the kid knows how to write poems, what can I say -- I guess theres a lot I could say to try to fill this line with a lot of text.',
+            ],
+            [],
+        ];
+        const someTuple = {
+            someUint32: new BigNumber(4037824789),
+            someStr:
+                'the kid knows how to write poems, what can I say -- I guess theres a lot I could say to try to fill this line with a lot of text.',
+        };
+        const someTupleWithDynamicTypes = {
+            someUint: new BigNumber(4024789),
+            someStr: 'akdhjasjkdhasjkldshdjahdkjsahdajksdhsajkdhsajkdhadjkashdjksadhajkdhsajkdhsadjk',
+            someBytes: '0x29384723894723843743289742389472398473289472348927489274894738427428947389facdea',
+            someAddress: '0xe41d2489571d322189246dafa5ebde1f4699f498',
+        };
+        const someTupleWithDynamicTypes2 = {
+            someUint: new BigNumber(9024789),
+            someStr: 'ksdhsajkdhsajkdhadjkashdjksadhajkdhsajkdhsadjkakdhjasjkdhasjkldshdjahdkjsahdaj',
+            someBytes: '0x29384723894398473289472348927489272384374328974238947274894738427428947389facde1',
+            someAddress: '0x746dafa5ebde1f4699f4981d3221892e41d24895',
+        };
+        const someTupleWithDynamicTypes3 = {
+            someUint: new BigNumber(1024789),
+            someStr: 'sdhsajkdhsajkdhadjkashdjakdhjasjkdhasjkldshdjahdkjsahdajkksadhajkdhsajkdhsadjk',
+            someBytes: '0x38947238437432829384729742389472398473289472348927489274894738427428947389facdef',
+            someAddress: '0x89571d322189e415ebde1f4699f498d24246dafa',
+        };
+        const someArrayOfTuplesWithDynamicTypes = [someTupleWithDynamicTypes2, someTupleWithDynamicTypes3];
+        const args = {
+            someStaticArray,
+            someStaticArrayWithDynamicMembers,
+            someDynamicArrayWithDynamicMembers,
+            some2DArray,
+            someTuple,
+            someTupleWithDynamicTypes,
+            someArrayOfTuplesWithDynamicTypes,
+        };
+        const calldata = method.encode(args, encodingRules);
+        // Validate calldata
+        const expectedCalldata =
+            '0x4b49031c000000000000000000000000000000000000000000000000000000000000007f000000000000000000000000000000000000000000000000000000000000000e0000000000000000000000000000000000000000000000000000000000000036000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000000000000000000000002800000000000000000000000000000000000000000000000000000000000000440000000000000000000000000000000000000000000000000000000000000088000000000000000000000000000000000000000000000000000000000000009800000000000000000000000000000000000000000000000000000000000000ae0000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000034746865206c6974746c6520706970696e67207069706572207069706564206120706970696e6720706970706572207061707065720000000000000000000000000000000000000000000000000000000000000000000000000000000000000081746865206b6964206b6e6f777320686f7720746f20777269746520706f656d732c20776861742063616e204920736179202d2d2049206775657373207468657265732061206c6f74204920636f756c642073617920746f2074727920746f2066696c6c2074686973206c696e6520776974682061206c6f74206f6620746578742e000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000014000000000000000000000000000000000000000000000000000000000000000163874563783498732482743928742389723894723984700000000000000000000000000000000000000000000000000000000000000000000000000000000006e72834723982374239847239847298472489274987489742847289472394874987498478743294237434923473298472398423748923748923748923472389472894789474893742894728947389427498237432987423894723894732894723894372498237498237428934723980000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000027283473298473248923749238742398742398472894729843278942374982374892374892743982000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000002800000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000000500000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e00000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000018000000000000000000000000000000000000000000000000000000000000001c0000000000000000000000000000000000000000000000000000000000000000b736f6d6520737472696e670000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000013736f6d6520616e6f7468657220737472696e67000000000000000000000000000000000000000000000000000000000000000000000000000000000000000024746865726520617265206a75737420746f6f206d616e7920737472696e6773757020696e0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000046865726500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002079616c6c2067686f6e6e61206d616b65206d65206c6f7365206d79206d696e640000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000034746865206c6974746c6520706970696e67207069706572207069706564206120706970696e6720706970706572207061707065720000000000000000000000000000000000000000000000000000000000000000000000000000000000000081746865206b6964206b6e6f777320686f7720746f20777269746520706f656d732c20776861742063616e204920736179202d2d2049206775657373207468657265732061206c6f74204920636f756c642073617920746f2074727920746f2066696c6c2074686973206c696e6520776974682061206c6f74206f6620746578742e00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000f0ac511500000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000081746865206b6964206b6e6f777320686f7720746f20777269746520706f656d732c20776861742063616e204920736179202d2d2049206775657373207468657265732061206c6f74204920636f756c642073617920746f2074727920746f2066696c6c2074686973206c696e6520776974682061206c6f74206f6620746578742e0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003d69d500000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000100000000000000000000000000e41d2489571d322189246dafa5ebde1f4699f498000000000000000000000000000000000000000000000000000000000000004e616b64686a61736a6b646861736a6b6c647368646a6168646b6a73616864616a6b73646873616a6b646873616a6b646861646a6b617368646a6b73616468616a6b646873616a6b64687361646a6b000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002829384723894723843743289742389472398473289472348927489274894738427428947389facdea0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000001a0000000000000000000000000000000000000000000000000000000000089b51500000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000100000000000000000000000000746dafa5ebde1f4699f4981d3221892e41d24895000000000000000000000000000000000000000000000000000000000000004e6b73646873616a6b646873616a6b646861646a6b617368646a6b73616468616a6b646873616a6b64687361646a6b616b64686a61736a6b646861736a6b6c647368646a6168646b6a73616864616a000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002829384723894398473289472348927489272384374328974238947274894738427428947389facde100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000fa3150000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000010000000000000000000000000089571d322189e415ebde1f4699f498d24246dafa000000000000000000000000000000000000000000000000000000000000004e73646873616a6b646873616a6b646861646a6b617368646a616b64686a61736a6b646861736a6b6c647368646a6168646b6a73616864616a6b6b73616468616a6b646873616a6b64687361646a6b000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002838947238437432829384729742389472398473289472348927489274894738427428947389facdef000000000000000000000000000000000000000000000000';
+        expect(calldata).to.be.equal(expectedCalldata);
+        // Validate decoding
+        const decodedValue = method.decode(calldata, { structsAsObjects: true });
+        expect(decodedValue).to.be.deep.equal(args);
+    });
+});
diff --git a/packages/utils/test/abi_encoder/optimizer_test.ts b/packages/utils/test/abi_encoder/optimizer_test.ts
new file mode 100644
index 000000000..18aa6549a
--- /dev/null
+++ b/packages/utils/test/abi_encoder/optimizer_test.ts
@@ -0,0 +1,262 @@
+import * as chai from 'chai';
+import 'mocha';
+
+import { AbiEncoder, BigNumber } from '../../src/';
+import { chaiSetup } from '../utils/chai_setup';
+
+import * as OptimizedAbis from './abi_samples/optimizer_abis';
+
+chaiSetup.configure();
+const expect = chai.expect;
+
+describe('ABI Encoder: Optimized Method Encoding/Decoding', () => {
+    const encodingRules: AbiEncoder.EncodingRules = { optimize: true };
+    it('Duplicate Dynamic Arrays with Static Elements', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.duplicateDynamicArraysWithStaticElements);
+        const array1 = [new BigNumber(100), new BigNumber(150)];
+        const array2 = array1;
+        const args = [array1, array2];
+        // Validata calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '0x7221063300000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000640000000000000000000000000000000000000000000000000000000000000096';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Duplicate Dynamic Arrays with Dynamic Elements', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.duplicateDynamicArraysWithDynamicElements);
+        const array1 = ['Hello', 'World'];
+        const array2 = array1;
+        const args = [array1, array2];
+        // Validata calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '0xbb4f12e300000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000548656c6c6f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005576f726c64000000000000000000000000000000000000000000000000000000';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Duplicate Static Arrays with Static Elements (should not optimize)', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.duplicateStaticArraysWithStaticElements);
+        const array1 = [new BigNumber(100), new BigNumber(150)];
+        const array2 = array1;
+        const args = [array1, array2];
+        // Validata calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '0x7f8130430000000000000000000000000000000000000000000000000000000000000064000000000000000000000000000000000000000000000000000000000000009600000000000000000000000000000000000000000000000000000000000000640000000000000000000000000000000000000000000000000000000000000096';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        const unoptimizedCalldata = method.encode(args);
+        expect(optimizedCalldata).to.be.equal(unoptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Duplicate Static Arrays with Dynamic Elements', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.duplicateStaticArraysWithDynamicElements);
+        const array1 = ['Hello', 'World'];
+        const array2 = array1;
+        const args = [array1, array2];
+        // Validata calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '0x9fe31f8e0000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000548656c6c6f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005576f726c64000000000000000000000000000000000000000000000000000000';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Duplicate Array Elements (should optimize)', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.duplicateArrayElements);
+        const strings = ['Hello', 'World', 'Hello', 'World'];
+        const args = [strings];
+        // Validate calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '0x13e751a900000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000c0000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000c0000000000000000000000000000000000000000000000000000000000000000548656c6c6f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005576f726c64000000000000000000000000000000000000000000000000000000';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Duplicate Tuple Fields', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.duplicateTupleFields);
+        const tuple = ['Hello', 'Hello'];
+        const args = [tuple];
+        // Validata calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '0x16780a5e000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000548656c6c6f000000000000000000000000000000000000000000000000000000';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Duplicate Strings', async () => {
+        // Description:
+        //   Two dynamic arrays with the same values.
+        //   In the optimized calldata, only one set of elements should be included.
+        //   Both arrays should point to this set.
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.duplicateStrings);
+        const args = ['Hello', 'Hello'];
+        // Validata calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '0x07370bfa00000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000548656c6c6f000000000000000000000000000000000000000000000000000000';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Duplicate Bytes', async () => {
+        // Description:
+        //   Two dynamic arrays with the same values.
+        //   In the optimized calldata, only one set of elements should be included.
+        //   Both arrays should point to this set.
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.duplicateBytes);
+        const value = '0x01020304050607080910111213141516171819202122232425262728293031323334353637383940';
+        const args = [value, value];
+        // Validata calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '0x6045e42900000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000002801020304050607080910111213141516171819202122232425262728293031323334353637383940000000000000000000000000000000000000000000000000';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Duplicate Tuples', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.duplicateTuples);
+        const tuple1 = ['Hello, World!', new BigNumber(424234)];
+        const tuple2 = tuple1;
+        const args = [tuple1, tuple2];
+        // Validata calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '0x564f826d000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000006792a000000000000000000000000000000000000000000000000000000000000000d48656c6c6f2c20576f726c642100000000000000000000000000000000000000';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Duplicate Fields Across Two Tuples', async () => {
+        // Description:
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.duplicateTuples);
+        const tuple1 = ['Hello, World!', new BigNumber(1)];
+        const tuple2 = [tuple1[0], new BigNumber(2)];
+        const args = [tuple1, tuple2];
+        // Validata calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '0x564f826d000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000d48656c6c6f2c20576f726c642100000000000000000000000000000000000000';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Duplicate Arrays, Nested in Separate Tuples', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.duplicateArraysNestedInTuples);
+        const array = [new BigNumber(100), new BigNumber(150), new BigNumber(200)];
+        const tuple1 = [array];
+        const tuple2 = [array, 'extra argument to prevent exactly matching the tuples'];
+        const args = [tuple1, tuple2];
+        // Validata calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '0x18970a9e000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000600000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000c000000000000000000000000000000000000000000000000000000000000000030000000000000000000000000000000000000000000000000000000000000064000000000000000000000000000000000000000000000000000000000000009600000000000000000000000000000000000000000000000000000000000000c80000000000000000000000000000000000000000000000000000000000000035657874726120617267756d656e7420746f2070726576656e742065786163746c79206d61746368696e6720746865207475706c65730000000000000000000000';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Duplicate Tuples, Nested in Separate Tuples', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.duplicateTuplesNestedInTuples);
+        const nestedTuple = ['Hello, World!'];
+        const tuple1 = [nestedTuple];
+        const tuple2 = [nestedTuple, 'extra argument to prevent exactly matching the tuples'];
+        const args = [tuple1, tuple2];
+        // Validata calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '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';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Duplicate Two-Dimensional Arrays', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.duplicateTwoDimensionalArrays);
+        const twoDimArray1 = [['Hello', 'World'], ['Foo', 'Bar', 'Zaa']];
+        const twoDimArray2 = twoDimArray1;
+        const args = [twoDimArray1, twoDimArray2];
+        // Validata calldata
+        const optimizedCalldata = method.encode(args, { optimize: false });
+        const expectedOptimizedCalldata =
+            '0x0d28c4f9000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000002c0000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000548656c6c6f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005576f726c640000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e00000000000000000000000000000000000000000000000000000000000000003466f6f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003426172000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000035a61610000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000548656c6c6f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005576f726c640000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e00000000000000000000000000000000000000000000000000000000000000003466f6f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003426172000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000035a61610000000000000000000000000000000000000000000000000000000000';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Duplicate Array, Nested within Separate Two-Dimensional Arrays', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.duplicateTwoDimensionalArrays);
+        const twoDimArray1 = [['Hello', 'World'], ['Foo']];
+        const twoDimArray2 = [['Hello', 'World'], ['Bar']];
+        const args = [twoDimArray1, twoDimArray2];
+        // Validata calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '0x0d28c4f900000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000001200000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000003466f6f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000548656c6c6f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005576f726c640000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000034261720000000000000000000000000000000000000000000000000000000000';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Array Elements Duplicated as Tuple Fields', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.arrayElementsDuplicatedAsTupleFields);
+        const array = [new BigNumber(100), new BigNumber(150), new BigNumber(200), new BigNumber(225)];
+        const tuple = [[array[0]], [array[1]], [array[2]], [array[3]]];
+        const args = [array, tuple];
+        // Validata calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '0x5b5c78fd0000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000064000000000000000000000000000000000000000000000000000000000000009600000000000000000000000000000000000000000000000000000000000000c800000000000000000000000000000000000000000000000000000000000000e1';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+    it('Array Elements Duplicated as Separate Parameter', async () => {
+        // Generate calldata
+        const method = new AbiEncoder.Method(OptimizedAbis.arrayElementsDuplicatedAsSeparateParameter);
+        const array = ['Hello', 'Hello', 'Hello', 'World'];
+        const str = 'Hello';
+        const args = [array, str];
+        // Validate calldata
+        const optimizedCalldata = method.encode(args, encodingRules);
+        const expectedOptimizedCalldata =
+            '0xe0e0d34900000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000000400000000000000000000000000000000000000000000000000000000000000c000000000000000000000000000000000000000000000000000000000000000c000000000000000000000000000000000000000000000000000000000000000c000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000005576f726c64000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000548656c6c6f000000000000000000000000000000000000000000000000000000';
+        expect(optimizedCalldata).to.be.equal(expectedOptimizedCalldata);
+        // Validate decoding
+        const decodedArgs = method.decode(optimizedCalldata);
+        expect(decodedArgs).to.be.deep.equal(args);
+    });
+});
diff --git a/packages/utils/test/abi_encoder/return_values_test.ts b/packages/utils/test/abi_encoder/return_values_test.ts
new file mode 100644
index 000000000..a8cdd6ca3
--- /dev/null
+++ b/packages/utils/test/abi_encoder/return_values_test.ts
@@ -0,0 +1,67 @@
+import * as chai from 'chai';
+import 'mocha';
+
+import { AbiEncoder } from '../../src/';
+import { chaiSetup } from '../utils/chai_setup';
+
+import * as ReturnValueAbis from './abi_samples/return_value_abis';
+
+chaiSetup.configure();
+const expect = chai.expect;
+
+describe('ABI Encoder: Return Value Encoding/Decoding', () => {
+    const encodingRules: AbiEncoder.EncodingRules = { optimize: false }; // optimizer is tested separately.
+    it('No Return Value', async () => {
+        // Decode return value
+        const method = new AbiEncoder.Method(ReturnValueAbis.noReturnValues);
+        const returnValue = '0x';
+        const decodedReturnValue = method.decodeReturnValues(returnValue);
+        const expectedDecodedReturnValue: any[] = [];
+        expect(decodedReturnValue).to.be.deep.equal(expectedDecodedReturnValue);
+    });
+    it('Single static return value', async () => {
+        // Generate Return Value
+        const method = new AbiEncoder.Method(ReturnValueAbis.singleStaticReturnValue);
+        const returnValue = ['0x01020304'];
+        const encodedReturnValue = method.encodeReturnValues(returnValue, encodingRules);
+        const decodedReturnValue = method.decodeReturnValues(encodedReturnValue);
+        // Validate decoded return value
+        expect(decodedReturnValue).to.be.deep.equal(returnValue);
+    });
+    it('Multiple static return values', async () => {
+        // Generate Return Value
+        const method = new AbiEncoder.Method(ReturnValueAbis.multipleStaticReturnValues);
+        const returnValue = ['0x01020304', '0x05060708'];
+        const encodedReturnValue = method.encodeReturnValues(returnValue, encodingRules);
+        const decodedReturnValue = method.decodeReturnValues(encodedReturnValue);
+        // Validate decoded return value
+        expect(decodedReturnValue).to.be.deep.equal(returnValue);
+    });
+    it('Single dynamic return value', async () => {
+        // Generate Return Value
+        const method = new AbiEncoder.Method(ReturnValueAbis.singleDynamicReturnValue);
+        const returnValue = ['0x01020304'];
+        const encodedReturnValue = method.encodeReturnValues(returnValue, encodingRules);
+        const decodedReturnValue = method.decodeReturnValues(encodedReturnValue);
+        // Validate decoded return value
+        expect(decodedReturnValue).to.be.deep.equal(returnValue);
+    });
+    it('Multiple dynamic return values', async () => {
+        // Generate Return Value
+        const method = new AbiEncoder.Method(ReturnValueAbis.multipleDynamicReturnValues);
+        const returnValue = ['0x01020304', '0x05060708'];
+        const encodedReturnValue = method.encodeReturnValues(returnValue, encodingRules);
+        const decodedReturnValue = method.decodeReturnValues(encodedReturnValue);
+        // Validate decoded return value
+        expect(decodedReturnValue).to.be.deep.equal(returnValue);
+    });
+    it('Mixed static/dynamic return values', async () => {
+        // Generate Return Value
+        const method = new AbiEncoder.Method(ReturnValueAbis.mixedStaticAndDynamicReturnValues);
+        const returnValue = ['0x01020304', '0x05060708'];
+        const encodedReturnValue = method.encodeReturnValues(returnValue, encodingRules);
+        const decodedReturnValue = method.decodeReturnValues(encodedReturnValue);
+        // Validate decoded return value
+        expect(decodedReturnValue).to.be.deep.equal(returnValue);
+    });
+});
diff --git a/packages/utils/test/utils/chai_setup.ts b/packages/utils/test/utils/chai_setup.ts
new file mode 100644
index 000000000..1a8733093
--- /dev/null
+++ b/packages/utils/test/utils/chai_setup.ts
@@ -0,0 +1,13 @@
+import * as chai from 'chai';
+import chaiAsPromised = require('chai-as-promised');
+import ChaiBigNumber = require('chai-bignumber');
+import * as dirtyChai from 'dirty-chai';
+
+export const chaiSetup = {
+    configure(): void {
+        chai.config.includeStack = true;
+        chai.use(ChaiBigNumber());
+        chai.use(dirtyChai);
+        chai.use(chaiAsPromised);
+    },
+};
diff --git a/packages/web3-wrapper/CHANGELOG.json b/packages/web3-wrapper/CHANGELOG.json
index ad6902e33..9f5194e0d 100644
--- a/packages/web3-wrapper/CHANGELOG.json
+++ b/packages/web3-wrapper/CHANGELOG.json
@@ -6,7 +6,8 @@
                 "note": "Unmarshall mined transaction receipts",
                 "pr": 1308
             }
-        ]
+        ],
+        "timestamp": 1543401373
     },
     {
         "version": "3.1.5",
diff --git a/packages/web3-wrapper/CHANGELOG.md b/packages/web3-wrapper/CHANGELOG.md
index fa88eee2c..fffaf1d0a 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
 
+## v3.1.6 - _November 28, 2018_
+
+    * Unmarshall mined transaction receipts (#1308)
+
 ## v3.1.5 - _November 21, 2018_
 
     * Add unmarshalling of transaction receipts (#1291)
diff --git a/packages/web3-wrapper/package.json b/packages/web3-wrapper/package.json
index 2eba35da7..218d85bfc 100644
--- a/packages/web3-wrapper/package.json
+++ b/packages/web3-wrapper/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/web3-wrapper",
-    "version": "3.1.5",
+    "version": "3.1.6",
     "engines": {
         "node": ">=6.12"
     },
diff --git a/packages/website/package.json b/packages/website/package.json
index 52ba206c6..dc10c7b1c 100644
--- a/packages/website/package.json
+++ b/packages/website/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@0x/website",
-    "version": "0.0.60",
+    "version": "0.0.61",
     "engines": {
         "node": ">=6.12"
     },
@@ -20,16 +20,16 @@
     "author": "Fabio Berger",
     "license": "Apache-2.0",
     "dependencies": {
-        "@0x/contract-wrappers": "^4.1.0",
+        "@0x/contract-wrappers": "^4.1.1",
         "@0x/json-schemas": "^2.1.2",
-        "@0x/order-utils": "^3.0.3",
-        "@0x/react-docs": "^1.0.19",
-        "@0x/react-shared": "^1.0.22",
-        "@0x/subproviders": "^2.1.5",
+        "@0x/order-utils": "^3.0.4",
+        "@0x/react-docs": "^1.0.20",
+        "@0x/react-shared": "^1.0.23",
+        "@0x/subproviders": "^2.1.6",
         "@0x/types": "^1.3.0",
         "@0x/typescript-typings": "^3.0.4",
         "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.5",
+        "@0x/web3-wrapper": "^3.1.6",
         "accounting": "^0.4.1",
         "basscss": "^8.0.3",
         "blockies": "^0.0.2",
diff --git a/packages/website/public/images/team/xianny.png b/packages/website/public/images/team/xianny.png
new file mode 100644
index 000000000..f6fe1ef61
--- /dev/null
+++ b/packages/website/public/images/team/xianny.png
diff --git a/packages/website/ts/pages/about/about.tsx b/packages/website/ts/pages/about/about.tsx
index dfe8926b0..81a3f59e1 100644
--- a/packages/website/ts/pages/about/about.tsx
+++ b/packages/website/ts/pages/about/about.tsx
@@ -248,6 +248,14 @@ const teamRow9: ProfileInfo[] = [
         linkedIn: 'https://www.linkedin.com/in/steveklebanoff/',
         github: 'https://github.com/steveklebanoff',
     },
+    {
+        name: 'Xianny Ng',
+        title: 'Engineer',
+        description: `Developer Experience. Previously telemetry at Mapbox and platform engineering at Bench Accounting.`,
+        image: 'images/team/xianny.png',
+        linkedIn: 'https://www.linkedin.com/in/xianny/',
+        github: 'https://github.com/xianny',
+    },
 ];
 
 const advisors1: ProfileInfo[] = [