Increase number of columns in relayer grid for small screens

Merge pull request #716 from 0xProject/feature/contracts/publicSignatureValidator
Make isValidSignature public
2018-06-18 17:44:09 -07:00 · 2018-06-18 16:20:16 -07:00 · 2018-06-18 16:00:55 -07:00 · 2018-06-18 16:00:43 -07:00 · 2018-06-18 15:50:02 -07:00 · 2018-06-18 23:33:17 +02:00
941 changed files with 56485 additions and 18379 deletions
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@ version: 2
 jobs:
  build:
    docker:
-      - image: circleci/node:6.12
+      - image: circleci/node:9
    environment:
      CONTRACTS_COMMIT_HASH: '9ed05f5'
    working_directory: ~/repo
@@ -11,95 +11,76 @@ jobs:
      - checkout
      - run: echo 'export PATH=$HOME/CIRCLE_PROJECT_REPONAME/node_modules/.bin:$PATH' >> $BASH_ENV
      - restore_cache:
-          key: dependency-cache-{{ checksum "package.json" }}
+          name: Restore Yarn Package Cache
+          keys:
+            - yarn-packages-{{ .Branch }}-{{ checksum "yarn.lock" }}
+            - yarn-packages-{{ .Branch }}
+            - yarn-packages-master
+            - yarn-packages-
      - run:
          name: yarn
-          command: yarn --frozen-lockfile
+          command: yarn --frozen-lockfile install
      - save_cache:
-          key: dependency-cache-{{ checksum "package.json" }}
+          name: Save Yarn Package Cache
+          key: yarn-packages-{{ .Branch }}-{{ checksum "yarn.lock" }}
          paths:
-            - ./node_modules
-      - run: wget https://s3.amazonaws.com/testrpc-shapshots/${CONTRACTS_COMMIT_HASH}.zip
-      - run: unzip ${CONTRACTS_COMMIT_HASH}.zip -d testrpc_snapshot
-      - run: node ./node_modules/lerna/bin/lerna.js bootstrap
-      - run: yarn lerna:run build
+            - node_modules/
+      - run: >
+            if [ -z "$(git diff --name-only v2-prototype packages/website)" ]; then
+                yarn build --exclude website
+            else
+                yarn build
+            fi
      - save_cache:
          key: repo-{{ .Environment.CIRCLE_SHA1 }}
          paths:
            - ~/repo
-  test-installation:
+  test-contracts-ganache:
    docker:
-      - image: circleci/node:6.12
+      - image: circleci/node:9
    working_directory: ~/repo
    steps:
      - restore_cache:
          keys:
            - repo-{{ .Environment.CIRCLE_SHA1 }}
-      - run: yarn test:installation
-  test-0xjs:
+      - run: yarn wsrun test:circleci contracts
+  test-contracts-geth:
    docker:
-      - image: circleci/node:6.12
+      - image: circleci/node:9
+      - image: albrow/0x-devnet
    working_directory: ~/repo
    steps:
      - restore_cache:
          keys:
            - repo-{{ .Environment.CIRCLE_SHA1 }}
-      - run:
-          name: testrpc
-          command: npm run testrpc -- --db testrpc_snapshot
-          background: true
-      - run: yarn lerna:run --scope 0x.js test:circleci
-      - save_cache:
-          key: coverage-0xjs-{{ .Environment.CIRCLE_SHA1 }}
-          paths:
-            - ~/repo/packages/0x.js/coverage/lcov.info
-  test-contracts:
-    docker:
-      - image: circleci/node:6.12
-    working_directory: ~/repo
-    steps:
-      - restore_cache:
-          keys:
-            - repo-{{ .Environment.CIRCLE_SHA1 }}
-      - run:
-          name: testrpc
-          command: npm run testrpc -- --db testrpc_snapshot
-          background: true
-      - run: yarn lerna:run --scope contracts test:circleci
-      - save_cache:
-          key: coverage-contracts-{{ .Environment.CIRCLE_SHA1 }}
-          paths:
-            - ~/repo/packages/contracts/coverage/lcov.info
-  test-deployer:
-    docker:
-      - image: circleci/node:6.12
-    working_directory: ~/repo
-    steps:
-      - restore_cache:
-          keys:
-            - repo-{{ .Environment.CIRCLE_SHA1 }}
-      - run:
-          name: testrpc
-          command: npm run testrpc -- --db testrpc_snapshot
-          background: true
-      - run: yarn lerna:run --scope @0xproject/deployer test:circleci
-      - save_cache:
-          key: coverage-deployer-{{ .Environment.CIRCLE_SHA1 }}
-          paths:
-            - ~/repo/packages/deployer/coverage/lcov.info
+      # HACK(albrow): we need to sleep 15 seconds to ensure the devnet is
+      # initialized
+      - run: sleep 15 && TEST_PROVIDER=geth yarn wsrun test contracts
  test-rest:
    docker:
-      - image: circleci/node:6.12
+      - image: circleci/node:9
    working_directory: ~/repo
    steps:
      - restore_cache:
          keys:
            - repo-{{ .Environment.CIRCLE_SHA1 }}
-      - run:
-          name: testrpc
-          command: npm run testrpc -- --db testrpc_snapshot
-          background: true
-      - run: yarn lerna:run --ignore contracts --ignore 0x.js --ignore @0xproject/deployer test:circleci
+      - run: yarn wsrun test:circleci @0xproject/contract-wrappers
+      - run: yarn wsrun test:circleci @0xproject/sol-compiler
+      - run: yarn wsrun test:circleci @0xproject/assert
+      - run: yarn wsrun test:circleci @0xproject/connect
+      - run: yarn wsrun test:circleci @0xproject/dev-utils
+      - run: yarn wsrun test:circleci @0xproject/json-schemas
+      - run: yarn wsrun test:circleci @0xproject/subproviders
+      - run: yarn wsrun test:circleci @0xproject/sol-cov
+      - run: yarn wsrun test:circleci @0xproject/metacoin
+      - save_cache:
+          key: coverage-contract-wrappers-{{ .Environment.CIRCLE_SHA1 }}
+          paths:
+            - ~/repo/packages/contract-wrappers/coverage/lcov.info
+      - save_cache:
+          key: coverage-sol-compiler-{{ .Environment.CIRCLE_SHA1 }}
+          paths:
+            - ~/repo/packages/sol-compiler/coverage/lcov.info
      - save_cache:
          key: coverage-assert-{{ .Environment.CIRCLE_SHA1 }}
          paths:
@@ -124,41 +105,37 @@ jobs:
          key: coverage-sol-cov-{{ .Environment.CIRCLE_SHA1 }}
          paths:
            - ~/repo/packages/sol-cov/coverage/lcov.info
-  lint:
+      - save_cache:
+          key: coverage-metacoin-{{ .Environment.CIRCLE_SHA1 }}
+          paths:
+            - ~/repo/packages/metacoin/coverage/lcov.info
+  static-tests:
    working_directory: ~/repo
    docker:
-      - image: circleci/node:6.12
-    steps:
-      - restore_cache:
-          keys:
-            - repo-{{ .Environment.CIRCLE_SHA1 }}
-      - run: yarn lerna:run lint
-  prettier:
-    working_directory: ~/repo
-    docker:
-      - image: circleci/node:6.12
+      - image: circleci/node:9
    steps:
      - restore_cache:
          keys:
            - repo-{{ .Environment.CIRCLE_SHA1 }}
      - run: yarn prettier:ci
+      - run: yarn lerna:run lint
  submit-coverage:
    docker:
-      - image: circleci/node:6.12
+      - image: circleci/node:9
    working_directory: ~/repo
    steps:
      - restore_cache:
          keys:
            - repo-{{ .Environment.CIRCLE_SHA1 }}
-      - restore_cache:
-          keys:
-            - coverage-contracts-{{ .Environment.CIRCLE_SHA1 }}
      - restore_cache:
          keys:
            - coverage-assert-{{ .Environment.CIRCLE_SHA1 }}
      - restore_cache:
          keys:
            - coverage-connect-{{ .Environment.CIRCLE_SHA1 }}
+      - restore_cache:
+          keys:
+            - coverage-contract-wrappers-{{ .Environment.CIRCLE_SHA1 }}
      - restore_cache:
          keys:
            - coverage-dev-utils-{{ .Environment.CIRCLE_SHA1 }}
@@ -173,40 +150,34 @@ jobs:
            - coverage-sol-cov-{{ .Environment.CIRCLE_SHA1 }}
      - restore_cache:
          keys:
-            - coverage-deployer-{{ .Environment.CIRCLE_SHA1 }}
+            - coverage-contracts-{{ .Environment.CIRCLE_SHA1 }}
+      - restore_cache:
+          keys:
+            - coverage-sol-compiler-{{ .Environment.CIRCLE_SHA1 }}
      - restore_cache:
          keys:
            - coverage-0xjs-{{ .Environment.CIRCLE_SHA1 }}
+      - restore_cache:
+          keys:
+            - coverage-metacoin-{{ .Environment.CIRCLE_SHA1 }}
      - run: yarn report_coverage
 workflows:
  version: 2
  main:
    jobs:
      - build
-      # - test-installation:
-      #     requires:
-      #       - build
-      - test-0xjs:
+      - test-contracts-ganache:
          requires:
            - build
-      - test-contracts:
-          requires:
-            - build
-      - test-deployer:
+      - test-contracts-geth:
          requires:
            - build
      - test-rest:
          requires:
            - build
-      - prettier:
-          requires:
-            - build
-      - lint:
+      - static-tests:
          requires:
            - build
      - submit-coverage:
          requires:
-            - test-0xjs
-            - test-deployer
            - test-rest
-            - test-contracts
--- a/.gitignore
+++ b/.gitignore
@@ -70,19 +70,28 @@ TODO.md
 packages/website/public/bundle*
 packages/react-docs/example/public/bundle*

-# generated binaries
-bin/
+# server cli
+packages/testnet-faucets/server/

-# generated contract artifacts
-packages/contracts/src/artifacts
+# generated contract artifacts/
+packages/sol-cov/test/fixtures/artifacts/
+packages/metacoin/artifacts/
+packages/order-watcher/test/artifacts/
+packages/contract-wrappers/test/artifacts/

 # generated contract wrappers
-packages/0x.js/src/contract_wrappers/generated/
-packages/contracts/src/contract_wrappers/generated/
+packages/0x.js/src/generated_contract_wrappers/
+packages/contracts/src/generated_contract_wrappers/
+packages/contract-wrappers/src/contract_wrappers/generated/
 packages/metacoin/src/contract_wrappers
+packages/fill-scenarios/src/generated_contract_wrappers/
+packages/order-watcher/src/generated_contract_wrappers/
+packages/order-utils/src/generated_contract_wrappers/
+packages/migrations/src/v1/contract_wrappers
+packages/migrations/src/v2/contract_wrappers

-# solc-bin in deployer
-packages/deployer/solc_bin/
+# solc-bin in sol-compiler
+packages/sol-compiler/solc_bin/

 # Monorepo scripts
 packages/*/scripts/
--- a/.prettierignore
+++ b/.prettierignore
@@ -1,5 +1,20 @@
 lib
 .nyc_output
+/packages/contract-wrappers/src/contract_wrappers/generated/
+/packages/metacoin/src/contract_wrappers
+/packages/0x.js/src/generated_contract_wrappers/
+/packages/contracts/src/generated_contract_wrappers/
+/packages/fill-scenarios/src/generated_contract_wrappers/
+/packages/order-watcher/src/generated_contract_wrappers/
+/packages/order-utils/src/generated_contract_wrappers/
+/packages/migrations/src/v1/contract_wrappers
+/packages/migrations/src/v2/contract_wrappers
+/packages/0x.js/test/artifacts
 /packages/contracts/src/artifacts
+/packages/metacoin/artifacts
+/packages/contract-wrappers/test/artifacts
+/packages/order-watcher/test/artifacts
+/packages/migrations/artifacts/1.0.0
+/packages/migrations/artifacts/2.0.0
 package.json
 scripts/postpublish_utils.js
--- a/1
+++ b/1
@@ -1 +0,0 @@
-*        @abandeali1 @BMillman19 @dekz @fabioberger @LogvinovLeon @Recmo
--- a/CODE_OF_CONDUCT.md
+++ b/CODE_OF_CONDUCT.md
@@ -0,0 +1,46 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment include:
+
+*   Using welcoming and inclusive language
+*   Being respectful of differing viewpoints and experiences
+*   Gracefully accepting constructive criticism
+*   Focusing on what is best for the community
+*   Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+*   The use of sexualized language or imagery and unwelcome sexual attention or advances
+*   Trolling, insulting/derogatory comments, and personal or political attacks
+*   Public or private harassment
+*   Publishing others' private information, such as a physical or electronic address, without explicit permission
+*   Other conduct which could reasonably be considered inappropriate in a professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at team@0xproject.com. The project team will review and investigate all complaints, and will respond in a way that it deems appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/
--- a/PULL_REQUEST_TEMPLATE.md
+++ b/PULL_REQUEST_TEMPLATE.md
@@ -36,7 +36,6 @@

 *   [ ] Change requires a change to the documentation.
 *   [ ] Added tests to cover my changes.
-*   [ ] Added new entries to the relevant CHANGELOGs.
-*   [ ] Updated the new versions of the changed packages in the relevant CHANGELOGs.
+*   [ ] Added new entries to the relevant CHANGELOG.jsons.
 *   [ ] Labeled this PR with the 'WIP' label if it is a work in progress.
 *   [ ] Labeled this PR with the labels corresponding to the changed package.
--- a/README.md
+++ b/README.md
@@ -14,31 +14,30 @@ This repository is a monorepo including the 0x protocol smart contracts and nume
 [![Discord](https://img.shields.io/badge/chat-rocket.chat-yellow.svg?style=flat)](https://chat.0xproject.com)
 [![Join the chat at https://gitter.im/0xProject/Lobby](https://badges.gitter.im/0xProject/Lobby.svg)](https://gitter.im/0xProject/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
-[![Greenkeeper badge](https://badges.greenkeeper.io/0xProject/0x-monorepo.svg?token=7c22e5c72acf39d3ead8d29c5d9bb38f9096df3e643024dcedd53ab732847be1&ts=1496426342666)](https://greenkeeper.io/)

 ### Published Packages

-| Package                                                         | Version                                                                                                                               | Description                                                                 |
-| --------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------- |
-| [`0x.js`](/packages/0x.js)                                      | [![npm](https://img.shields.io/npm/v/0x.js.svg)](https://www.npmjs.com/package/0x.js)                                                 | A Javascript library for interacting with the 0x protocol                   |
-| [`@0xproject/abi-gen`](/packages/abi-gen)                       | [![npm](https://img.shields.io/npm/v/@0xproject/abi-gen.svg)](https://www.npmjs.com/package/@0xproject/abi-gen)                       | Tool to generate TS wrappers from smart contract ABIs                       |
-| [`@0xproject/assert`](/packages/assert)                         | [![npm](https://img.shields.io/npm/v/@0xproject/assert.svg)](https://www.npmjs.com/package/@0xproject/assert)                         | Type and schema assertions used by our packages                             |
-| [`@0xproject/base-contract`](/packages/base-contract)           | [![npm](https://img.shields.io/npm/v/@0xproject/base-contract.svg)](https://www.npmjs.com/package/@0xproject/base-contract)           | BaseContract used by auto-generated `abi-gen` wrapper contracts             |
-| [`@0xproject/connect`](/packages/connect)                       | [![npm](https://img.shields.io/npm/v/@0xproject/connect.svg)](https://www.npmjs.com/package/@0xproject/connect)                       | A Javascript library for interacting with the Standard Relayer API          |
-| [`@0xproject/deployer`](/packages/deployer)                     | [![npm](https://img.shields.io/npm/v/@0xproject/deployer.svg)](https://www.npmjs.com/package/@0xproject/deployer)                     | Solidity project compiler and deployer framework                            |
-| [`@0xproject/dev-utils`](/packages/dev-utils)                   | [![npm](https://img.shields.io/npm/v/@0xproject/dev-utils.svg)](https://www.npmjs.com/package/@0xproject/dev-utils)                   | Dev utils to be shared across 0x projects and packages                      |
-| [`@0xproject/json-schemas`](/packages/json-schemas)             | [![npm](https://img.shields.io/npm/v/@0xproject/json-schemas.svg)](https://www.npmjs.com/package/@0xproject/json-schemas)             | 0x-related json schemas                                                     |
-| [`@0xproject/monorepo-scripts`](/packages/monorepo-scripts)     | [![npm](https://img.shields.io/npm/v/@0xproject/monorepo-scripts.svg)](https://www.npmjs.com/package/@0xproject/monorepo-scripts)     | Monorepo scripts                                                            |
-| [`@0xproject/react-docs`](/packages/react-docs)                 | [![npm](https://img.shields.io/npm/v/@0xproject/react-docs.svg)](https://www.npmjs.com/package/@0xproject/react-docs)                 | React documentation component for rendering TypeDoc & Doxity generated JSON |
-| [`@0xproject/react-shared`](/packages/react-shared)             | [![npm](https://img.shields.io/npm/v/@0xproject/react-shared.svg)](https://www.npmjs.com/package/@0xproject/react-shared)             | 0x shared react components                                                  |
-| [`@0xproject/sra-report`](/packages/sra-report)                 | [![npm](https://img.shields.io/npm/v/@0xproject/sra-report.svg)](https://www.npmjs.com/package/@0xproject/sra-report)                 | Generate reports for standard relayer API compliance                        |
-| [`@0xproject/sol-cov`](/packages/sol-cov)                       | [![npm](https://img.shields.io/npm/v/@0xproject/sol-cov.svg)](https://www.npmjs.com/package/@0xproject/sol-cov)                       | Solidity test coverage tool tool                                            |
-| [`@0xproject/subproviders`](/packages/subproviders)             | [![npm](https://img.shields.io/npm/v/@0xproject/subproviders.svg)](https://www.npmjs.com/package/@0xproject/subproviders)             | Useful web3 subproviders (e.g LedgerSubprovider)                            |
-| [`@0xproject/tslint-config`](/packages/tslint-config)           | [![npm](https://img.shields.io/npm/v/@0xproject/tslint-config.svg)](https://www.npmjs.com/package/@0xproject/tslint-config)           | Custom 0x development TSLint rules                                          |
-| [`@0xproject/types`](/packages/types)                           | [![npm](https://img.shields.io/npm/v/@0xproject/types.svg)](https://www.npmjs.com/package/@0xproject/types)                           | Shared type declarations                                                    |
-| [`@0xproject/typescript-typings`](/packages/typescript-typings) | [![npm](https://img.shields.io/npm/v/@0xproject/typescript-typings.svg)](https://www.npmjs.com/package/@0xproject/typescript-typings) | Repository of types for external packages                                   |
-| [`@0xproject/utils`](/packages/utils)                           | [![npm](https://img.shields.io/npm/v/@0xproject/utils.svg)](https://www.npmjs.com/package/@0xproject/utils)                           | Shared utilities                                                            |
-| [`@0xproject/web3-wrapper`](/packages/web3-wrapper)             | [![npm](https://img.shields.io/npm/v/@0xproject/web3-wrapper.svg)](https://www.npmjs.com/package/@0xproject/web3-wrapper)             | Web3 wrapper                                                                |
+| Package                                                         | Version                                                                                                                               | Description                                                                                                               |
+| --------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------- |
+| [`0x.js`](/packages/0x.js)                                      | [![npm](https://img.shields.io/npm/v/0x.js.svg)](https://www.npmjs.com/package/0x.js)                                                 | A Javascript library for interacting with the 0x protocol                                                                 |
+| [`@0xproject/abi-gen`](/packages/abi-gen)                       | [![npm](https://img.shields.io/npm/v/@0xproject/abi-gen.svg)](https://www.npmjs.com/package/@0xproject/abi-gen)                       | Tool to generate TS wrappers from smart contract ABIs                                                                     |
+| [`@0xproject/assert`](/packages/assert)                         | [![npm](https://img.shields.io/npm/v/@0xproject/assert.svg)](https://www.npmjs.com/package/@0xproject/assert)                         | Type and schema assertions used by our packages                                                                           |
+| [`@0xproject/base-contract`](/packages/base-contract)           | [![npm](https://img.shields.io/npm/v/@0xproject/base-contract.svg)](https://www.npmjs.com/package/@0xproject/base-contract)           | BaseContract used by auto-generated `abi-gen` wrapper contracts                                                           |
+| [`@0xproject/connect`](/packages/connect)                       | [![npm](https://img.shields.io/npm/v/@0xproject/connect.svg)](https://www.npmjs.com/package/@0xproject/connect)                       | A Javascript library for interacting with the Standard Relayer API                                                        |
+| [`@0xproject/sol-compiler`](/packages/sol-compiler)             | [![npm](https://img.shields.io/npm/v/@0xproject/sol-compiler.svg)](https://www.npmjs.com/package/@0xproject/sol-compiler)             | A thin wrapper around Solc.js that outputs artifacts, resolves imports, only re-compiles when needed, and other niceties. |
+| [`@0xproject/dev-utils`](/packages/dev-utils)                   | [![npm](https://img.shields.io/npm/v/@0xproject/dev-utils.svg)](https://www.npmjs.com/package/@0xproject/dev-utils)                   | Dev utils to be shared across 0x projects and packages                                                                    |
+| [`@0xproject/json-schemas`](/packages/json-schemas)             | [![npm](https://img.shields.io/npm/v/@0xproject/json-schemas.svg)](https://www.npmjs.com/package/@0xproject/json-schemas)             | 0x-related json schemas                                                                                                   |
+| [`@0xproject/monorepo-scripts`](/packages/monorepo-scripts)     | [![npm](https://img.shields.io/npm/v/@0xproject/monorepo-scripts.svg)](https://www.npmjs.com/package/@0xproject/monorepo-scripts)     | Monorepo scripts                                                                                                          |
+| [`@0xproject/react-docs`](/packages/react-docs)                 | [![npm](https://img.shields.io/npm/v/@0xproject/react-docs.svg)](https://www.npmjs.com/package/@0xproject/react-docs)                 | React documentation component for rendering TypeDoc & Doxity generated JSON                                               |
+| [`@0xproject/react-shared`](/packages/react-shared)             | [![npm](https://img.shields.io/npm/v/@0xproject/react-shared.svg)](https://www.npmjs.com/package/@0xproject/react-shared)             | 0x shared react components                                                                                                |
+| [`@0xproject/sra-report`](/packages/sra-report)                 | [![npm](https://img.shields.io/npm/v/@0xproject/sra-report.svg)](https://www.npmjs.com/package/@0xproject/sra-report)                 | Generate reports for standard relayer API compliance                                                                      |
+| [`@0xproject/sol-cov`](/packages/sol-cov)                       | [![npm](https://img.shields.io/npm/v/@0xproject/sol-cov.svg)](https://www.npmjs.com/package/@0xproject/sol-cov)                       | Solidity test coverage tool                                                                                               |
+| [`@0xproject/subproviders`](/packages/subproviders)             | [![npm](https://img.shields.io/npm/v/@0xproject/subproviders.svg)](https://www.npmjs.com/package/@0xproject/subproviders)             | Useful web3 subproviders (e.g LedgerSubprovider)                                                                          |
+| [`@0xproject/tslint-config`](/packages/tslint-config)           | [![npm](https://img.shields.io/npm/v/@0xproject/tslint-config.svg)](https://www.npmjs.com/package/@0xproject/tslint-config)           | Custom 0x development TSLint rules                                                                                        |
+| [`@0xproject/types`](/packages/types)                           | [![npm](https://img.shields.io/npm/v/@0xproject/types.svg)](https://www.npmjs.com/package/@0xproject/types)                           | Shared type declarations                                                                                                  |
+| [`@0xproject/typescript-typings`](/packages/typescript-typings) | [![npm](https://img.shields.io/npm/v/@0xproject/typescript-typings.svg)](https://www.npmjs.com/package/@0xproject/typescript-typings) | Repository of types for external packages                                                                                 |
+| [`@0xproject/utils`](/packages/utils)                           | [![npm](https://img.shields.io/npm/v/@0xproject/utils.svg)](https://www.npmjs.com/package/@0xproject/utils)                           | Shared utilities                                                                                                          |
+| [`@0xproject/web3-wrapper`](/packages/web3-wrapper)             | [![npm](https://img.shields.io/npm/v/@0xproject/web3-wrapper.svg)](https://www.npmjs.com/package/@0xproject/web3-wrapper)             | Web3 wrapper                                                                                                              |

 ### Private Packages

@@ -57,12 +56,14 @@ Dedicated documentation pages:
 *   [0x Connect](https://0xproject.com/docs/connect)
 *   [Smart contracts](https://0xproject.com/docs/contracts)
 *   [Subproviders](https://0xproject.com/docs/subproviders)
-*   [Deployer](https://0xproject.com/docs/deployer)
+*   [Sol Compiler](https://0xproject.com/docs/sol-compiler)
 *   [Web3-wrapper](https://0xproject.com/docs/web3-wrapper)
 *   [JSON-schemas](https://0xproject.com/docs/json-schemas)
 *   [Sol-cov](https://0xproject.com/docs/sol-cov)
 *   [Standard Relayer API](https://github.com/0xProject/standard-relayer-api/blob/master/README.md)

+Node version >= 6.12 is required.
+
 Most of the packages require additional typings for external dependencies.
 You can include those by prepending @0xproject/typescript-typings package to your [`typeRoots`](http://www.typescriptlang.org/docs/handbook/tsconfig-json.html) config.

@@ -74,7 +75,7 @@ You can include those by prepending @0xproject/typescript-typings package to you

 We strongly recommend that the community help us make improvements and determine the future direction of the protocol. To report bugs within this package, please create an issue in this repository.

-Please read our [contribution guidelines](./CONTRIBUTING.md) before getting started.
+#### Read our [contribution guidelines](./CONTRIBUTING.md).

 ### Install dependencies

@@ -92,50 +93,87 @@ yarn install

 ### Build

-Build all packages. You need to do this before working on any given package. Although these packages
-as independent, when run from within the monorepo, they are internally symlinked, to make development
-easier. You can change several packages and run the changes without publishing them first to NPM. When
-running `rebuild`, Lerna will figure out the dependency order of all the packages, and build them in
-this order.
+To build all packages:

 ```bash
-yarn lerna:rebuild
+yarn build
 ```

-Or continuously rebuild on change:
+To build a specific package:

 ```bash
-yarn dev
+PKG=@0xproject/web3-wrapper yarn build
+```
+
+### Watch
+
+To re-build all packages on change:
+
+```bash
+yarn watch
+```
+
+To watch a specific package and all it's dependent packages:
+
+```bash
+PKG=[NPM_PACKAGE_NAME] yarn watch
+
+e.g
+PKG=@0xproject/web3-wrapper yarn watch
+```
+
+### Clean
+
+Clean all packages:
+
+```bash
+yarn clean
+```
+
+Clean a specific package
+
+```bash
+PKG=0x.js yarn clean
+```
+
+### Rebuild
+
+To re-build (clean & build) all packages:
+
+```bash
+yarn rebuild
+```
+
+To re-build (clean & build) a specific package & it's deps:
+
+```bash
+PKG=0x.js yarn rebuild
 ```

 ### Lint

-Lint all packages
+Lint all packages:

 ```bash
-yarn lerna:run lint
+yarn lint
+```
+
+Lint a specific package:
+
+```bash
+PKG=0x.js yarn lint
 ```

 ### Run Tests

-Before running the tests, you will need to spin up a [TestRPC](https://www.npmjs.com/package/ethereumjs-testrpc) instance and deploy all the 0x smart contracts.
-
-In a separate terminal, start TestRPC (a convenience command is provided as part of this repo)
+Run all tests:

 ```bash
-yarn testrpc
+yarn test
 ```

-Then in your main terminal run
-
-```
-cd packages/contracts
-yarn migrate
-cd ..
-```
-
-And finally from the root project directory run
+Run a specific package's test:

 ```bash
-yarn lerna:run test
+PKG=@0xproject/web3-wrapper yarn test
 ```
--- a/package.json
+++ b/package.json
@@ -1,26 +1,36 @@
 {
    "private": true,
    "name": "0x-monorepo",
+    "engines": {
+        "node" : ">=6.12"
+    },
    "workspaces": [
        "packages/*"
    ],
    "scripts": {
-        "dev": "lerna run --parallel build:watch",
-        "testrpc": "testrpc -p 8545 --networkId 50 -m \"${npm_package_config_mnemonic}\"",
+        "ganache": "ganache-cli -p 8545 --networkId 50 -m \"${npm_package_config_mnemonic}\"",
        "prettier": "prettier --write '**/*.{ts,tsx,json,md}' --config .prettierrc",
        "prettier:ci": "prettier --list-different '**/*.{ts,tsx,json,md}' --config .prettierrc",
        "report_coverage": "lcov-result-merger 'packages/*/coverage/lcov.info' | coveralls",
        "test:installation": "node ./packages/monorepo-scripts/lib/test_installation.js",
-        "lerna:install": "yarn install",
-        "lerna:run": "lerna run",
-        "lerna:clean": "lerna run clean",
-        "lerna:build": "lerna run build",
-        "lerna:rebuild": "run-s lerna:clean lerna:build",
-        "lerna:publish": "run-s lerna:install lerna:rebuild script:publish",
-        "lerna:publish:dry": "run-s lerna:install lerna:rebuild script:publish:dry",
-        "lerna:stage_docs": "lerna run docs:stage",
+        "run:publish": "run-s install:all build:monorepo_scripts script:prepublish_checks rebuild script:publish",
+        "run:publish:dry": "run-s install:all build:monorepo_scripts script:prepublish_checks rebuild script:publish:dry",
+        "script:prepublish_checks": "node ./packages/monorepo-scripts/lib/prepublish_checks.js",
        "script:publish": "node ./packages/monorepo-scripts/lib/publish.js",
-        "script:publish:dry": "IS_DRY_RUN=true yarn script:publish"
+        "script:publish:dry": "IS_DRY_RUN=true yarn script:publish",
+        "install:all": "yarn install",
+        "wsrun": "wsrun",
+        "lerna:run": "lerna run",
+        "watch": "wsrun watch_without_deps $PKG --fast-exit -r --stages --done-criteria='complete|successfully'",
+        "build": "wsrun build $PKG --fast-exit -r --stages",
+        "build:monorepo_scripts": "PKG=@0xproject/monorepo-scripts yarn build",
+        "clean": "wsrun clean $PKG --fast-exit -r --parallel",
+        "rebuild": "run-s clean build",
+        "test": "wsrun test $PKG --fast-exit --serial --exclude-missing",
+        "stage_docs": "wsrun docs:stage $PKG --fast-exit --parallel --exclude-missing",
+        "lint": "wsrun lint $PKG --fast-exit --parallel --exclude-missing",
+        "comment:postinstall": "HACK: For some reason `yarn` is not setting up symlinks properly for order-utils. We temporarily set them manually. Remove this after V2 refactor is complete.",
+        "postinstall": "rm -rf `pwd`/packages/order-utils/node_modules/@0xproject; mkdir `pwd`/packages/order-utils/node_modules/@0xproject; ln -s `pwd`/packages/json-schemas `pwd`/packages/order-utils/node_modules/@0xproject/json-schemas; ln -s `pwd`/packages/types `pwd`/packages/order-utils/node_modules/@0xproject/types; rm -f `pwd`/packages/contracts/node_modules/@0xproject/types; ln -s `pwd`/packages/types `pwd`/packages/contracts/node_modules/@0xproject/types; mkdir -p `pwd`/packages/fill-scenarios/node_modules/@0xproject; ln -s `pwd`/packages/types `pwd`/packages/fill-scenarios/node_modules/@0xproject/types; ln -s `pwd`/packages/order-utils `pwd`/packages/fill-scenarios/node_modules/@0xproject/order-utils"
    },
    "config": {
        "mnemonic": "concert load couple harbor equip island argue ramp clarify fence smart topic"
@@ -28,10 +38,16 @@
    "devDependencies": {
        "async-child-process": "^1.1.1",
        "coveralls": "^3.0.0",
-        "ethereumjs-testrpc": "^6.0.3",
-        "lcov-result-merger": "^2.0.0",
+        "ganache-cli": "^6.1.0",
+        "lcov-result-merger": "^3.0.0",
        "lerna": "^2.5.1",
        "npm-run-all": "^4.1.2",
-        "prettier": "^1.11.1"
+        "prettier": "^1.11.1",
+        "wsrun": "^2.2.0",
+        "source-map-support": "^0.5.6"
+    },
+    "resolutions": {
+        "ethereumjs-tx": "0xProject/ethereumjs-tx#fake-tx-include-signature-by-default",
+        "ethers": "0xproject/ethers.js#eip-838-reasons"
    }
 }
--- a/packages/0x.js/CHANGELOG.json
+++ b/packages/0x.js/CHANGELOG.json
@@ -1,10 +1,101 @@
 [
+    {
+        "version": "0.38.0",
+        "changes": [
+            {
+                "note": "Renamed createOrderStateWatcher to createOrderWatcherAsync since it is now async",
+                "pr": 579
+            },
+            {
+                "note":
+                    "Renamed ZeroExError to ContractWrappersErrors since they now lives in the @0xproject/contract-wrappers subpackage",
+                "pr": 579
+            }
+        ],
+        "timestamp": 1527008270
+    },
+    {
+        "timestamp": 1525477860,
+        "version": "0.37.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1525453812,
+        "version": "0.37.1",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "version": "0.37.0",
+        "changes": [
+            {
+                "note": "Fixed expiration watcher comparator to handle orders with equal expiration times",
+                "pr": 526
+            },
+            {
+                "note": "Update Web3 Provider Engine to 14.0.4",
+                "pr": 555
+            },
+            {
+                "note": "Add `zeroEx.getProvider()`",
+                "pr": 559
+            },
+            {
+                "note": "Move `ZeroExError.InvalidSignature` to `@0xproject/order-utils` `OrderError.InvalidSignature`",
+                "pr": 559
+            }
+        ],
+        "timestamp": 1525428773
+    },
+    {
+        "version": "0.36.3",
+        "changes": [
+            {
+                "note": "Move @0xproject/migrations to devDependencies"
+            }
+        ],
+        "timestamp": 1524079658
+    },
+    {
+        "timestamp": 1524073495,
+        "version": "0.36.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "version": "0.36.1",
+        "changes": [
+            {
+                "note": "Internal changes and refactoring"
+            },
+            {
+                "note": "Fix redundant expired order removal bug",
+                "pr": 527
+            }
+        ],
+        "timestamp": 1524044013
+    },
    {
        "version": "0.36.0",
        "changes": [
            {
                "note": "Moved Web3.Provider to `@0xproject/types:Provider`",
                "pr": 501
+            },
+            {
+                "note":
+                    "Add `zeroEx.exchange.getOrderStateAsync` to allow obtaining current OrderState for a signedOrder",
+                "pr": 510
            }
        ],
        "timestamp": 1523462196
@@ -14,7 +105,7 @@
        "changes": [
            {
                "note":
-                    "Removed `ZeroExError.TransactionMiningTimeout` and moved it to '@0xproject/web3_wrapper' `Web3WrapperErrors.TransactionMiningTimeout`",
+                    "Removed `ZeroExError.TransactionMiningTimeout` and moved it to '@0xproject/web3-wrapper' `Web3WrapperErrors.TransactionMiningTimeout`",
                "pr": 485
            }
        ],
--- a/packages/0x.js/CHANGELOG.md
+++ b/packages/0x.js/CHANGELOG.md
@@ -5,13 +5,47 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v0.38.0 - _May 22, 2018_
+
+    * Renamed createOrderStateWatcher to createOrderWatcherAsync since it is now async (#579)
+    * Renamed ZeroExError to ContractWrappersErrors since they now lives in the @0xproject/contract-wrappers subpackage (#579)
+
+## v0.37.2 - _May 4, 2018_
+
+    * Dependencies updated
+
+## v0.37.1 - _May 4, 2018_
+
+    * Dependencies updated
+
+## v0.37.0 - _May 4, 2018_
+
+    * Fixed expiration watcher comparator to handle orders with equal expiration times (#526)
+    * Update Web3 Provider Engine to 14.0.4 (#555)
+    * Add `zeroEx.getProvider()` (#559)
+    * Move `ZeroExError.InvalidSignature` to `@0xproject/order-utils` `OrderError.InvalidSignature` (#559)
+
+## v0.36.3 - _April 18, 2018_
+
+    * Move @0xproject/migrations to devDependencies
+
+## v0.36.2 - _April 18, 2018_
+
+    * Dependencies updated
+
+## v0.36.1 - _April 18, 2018_
+
+    * Internal changes and refactoring
+    * Fix redundant expired order removal bug (#527)
+
 ## v0.36.0 - _April 11, 2018_

    * Moved Web3.Provider to `@0xproject/types:Provider` (#501)
+    * Add `zeroEx.exchange.getOrderStateAsync` to allow obtaining current OrderState for a signedOrder (#510)

 ## v0.35.0 - _April 2, 2018_

-    * Removed `ZeroExError.TransactionMiningTimeout` and moved it to '@0xproject/web3_wrapper' `Web3WrapperErrors.TransactionMiningTimeout` (#485)
+    * Removed `ZeroExError.TransactionMiningTimeout` and moved it to '@0xproject/web3-wrapper' `Web3WrapperErrors.TransactionMiningTimeout` (#485)

 ## v0.34.0 - _April 2, 2018_

--- a/packages/0x.js/README.md
+++ b/packages/0x.js/README.md
@@ -2,7 +2,7 @@

 A TypeScript/Javascript library for interacting with the 0x protocol.

-### Read the [Documentation](https://0xproject.com/docs/0xjs).
+### Read the [Documentation](https://0xproject.com/docs/0x.js).

 ## Installation

@@ -44,7 +44,7 @@ Download the UMD module from our [releases page](https://github.com/0xProject/0x

 ## Contributing

-We strongly recommend that the community help us make improvements and determine the future direction of the protocol. To report bugs within this package, please create an issue in this repository.
+We strongly recommend that the community help us make improvements and determine the future direction of 0x protocol. To report bugs within this package, please create an issue in this repository.

 Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.

@@ -64,28 +64,16 @@ yarn install

 ### Build

-If this is your **first** time building this package, you must first build **all** packages within the monorepo. This is because packages that depend on other packages located inside this monorepo are symlinked when run from **within** the monorepo. This allows you to make changes across multiple packages without first publishing dependent packages to NPM. To build all packages, run the following from the monorepo root directory:
+To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:

 ```bash
-yarn lerna:rebuild
+PKG=0x.js yarn build
 ```

 Or continuously rebuild on change:

 ```bash
-yarn dev
-```
-
-You can also build this specific package by running the following from within its directory:
-
-```bash
-yarn build
-```
-
-or continuously rebuild on change:
-
-```bash
-yarn build:watch
+PKG=0x.js yarn watch
 ```

 ### Clean
--- a/packages/0x.js/package.json
+++ b/packages/0x.js/package.json
@@ -1,6 +1,9 @@
 {
    "name": "0x.js",
-    "version": "0.35.0",
+    "version": "0.38.0",
+    "engines": {
+        "node": ">=6.12"
+    },
    "description": "A javascript library for interacting with the 0x protocol",
    "keywords": [
        "0x.js",
@@ -12,28 +15,29 @@
    "main": "lib/src/index.js",
    "types": "lib/src/index.d.ts",
    "scripts": {
-        "build:watch": "tsc -w",
-        "prebuild": "run-s clean generate_contract_wrappers",
-        "build": "run-p build:umd:prod build:commonjs; exit 0;",
-        "generate_contract_wrappers": "node ../abi-gen/lib/index.js --abis 'src/artifacts/@(Exchange|Token|TokenTransferProxy|EtherToken|TokenRegistry|DummyToken).json' --template ../contract_templates/contract.handlebars --partials '../contract_templates/partials/**/*.handlebars' --output src/contract_wrappers/generated --backend ethers && prettier --write 'src/contract_wrappers/generated/**.ts'",
-        "lint": "tslint --project . 'src/**/*.ts' 'test/**/*.ts'",
+        "watch_without_deps": "yarn pre_build && tsc -w",
+        "build": "yarn pre_build && yarn build:all && copyfiles -u 3 './lib/src/monorepo_scripts/**/*' ./scripts",
+        "build:all": "run-p build:umd:prod build:commonjs; exit 0;",
+        "pre_build": "run-s generate_contract_wrappers copy_artifacts",
+        "copy_artifacts": "copyfiles -u 2 './src/compact_artifacts/**/*.json' ./lib/src/compact_artifacts",
+        "generate_contract_wrappers": "abi-gen --abis 'src/compact_artifacts/@(Exchange|Token|TokenTransferProxy|EtherToken|TokenRegistry|DummyToken).json' --template ../contract_templates/contract.handlebars --partials '../contract_templates/partials/**/*.handlebars' --output src/generated_contract_wrappers --backend ethers",
+        "lint": "tslint --project . --exclude **/src/generated_contract_wrappers/**/*",
        "test:circleci": "run-s test:coverage",
-        "test": "run-s clean test:commonjs",
+        "test": "yarn run_mocha",
+        "rebuild_and_test": "run-s build test",
        "test:coverage": "nyc npm run test --all && yarn coverage:report:lcov",
        "coverage:report:lcov": "nyc report --reporter=text-lcov > coverage/lcov.info",
-        "update_contracts": "for i in ${npm_package_config_artifacts}; do copyfiles -u 4 ../contracts/build/contracts/$i.json ../0x.js/src/artifacts; done;",
-        "clean": "shx rm -rf _bundles lib test_temp scripts",
+        "clean": "shx rm -rf _bundles lib test_temp scripts src/generated_contract_wrappers",
        "build:umd:prod": "NODE_ENV=production webpack",
-        "build:commonjs": "tsc && copyfiles -u 2 './src/artifacts/**/*.json' ./lib/src/artifacts && copyfiles -u 3 './lib/src/monorepo_scripts/**/*' ./scripts",
-        "test:commonjs": "run-s build:commonjs run_mocha",
-        "run_mocha": "mocha lib/test/**/*_test.js --timeout 10000 --bail --exit",
+        "build:commonjs": "tsc && copyfiles -u 2 './src/compact_artifacts/**/*.json' ./lib/src/compact_artifacts && copyfiles -u 3 './lib/src/monorepo_scripts/**/*' ./scripts",
+        "run_mocha": "mocha --require source-map-support/register lib/test/**/*_test.js lib/test/global_hooks.js --timeout 10000 --bail --exit",
        "manual:postpublish": "yarn build; node ./scripts/postpublish.js",
-        "docs:stage": "yarn build && node ./scripts/stage_docs.js",
+        "docs:stage": "node scripts/stage_docs.js",
        "docs:json": "typedoc --excludePrivate --excludeExternals --target ES5 --json $JSON_FILE_PATH $PROJECT_FILES",
        "upload_docs_json": "aws s3 cp generated_docs/index.json $S3_URL --profile 0xproject --grants read=uri=http://acs.amazonaws.com/groups/global/AllUsers --content-type application/json"
    },
    "config": {
-        "artifacts": "TokenTransferProxy Exchange TokenRegistry Token EtherToken",
+        "compact_artifacts": "Exchange DummyToken ZRXToken Token EtherToken TokenTransferProxy TokenRegistry",
        "postpublish": {
            "assets": [
                "packages/0x.js/_bundles/index.js",
@@ -42,9 +46,17 @@
            "docPublishConfigs": {
                "extraFileIncludes": [
                    "../types/src/index.ts",
-                    "./src/contract_wrappers/generated/ether_token.ts",
-                    "./src/contract_wrappers/generated/token.ts",
-                    "./src/contract_wrappers/generated/exchange.ts"
+                    "../ethereum-types/src/index.ts",
+                    "../contract-wrappers/src/types.ts",
+                    "../contract-wrappers/src/contract_wrappers/ether_token_wrapper.ts",
+                    "../contract-wrappers/src/contract_wrappers/exchange_wrapper.ts",
+                    "../contract-wrappers/src/contract_wrappers/token_registry_wrapper.ts",
+                    "../contract-wrappers/src/contract_wrappers/token_transfer_proxy_wrapper.ts",
+                    "../contract-wrappers/src/contract_wrappers/token_wrapper.ts",
+                    "../order-watcher/src/order_watcher/order_watcher.ts",
+                    "./src/generated_contract_wrappers/ether_token.ts",
+                    "./src/generated_contract_wrappers/token.ts",
+                    "./src/generated_contract_wrappers/exchange.ts"
                ],
                "s3BucketPath": "s3://doc-jsons/0x.js/",
                "s3StagingBucketPath": "s3://staging-doc-jsons/0x.js/"
@@ -56,20 +68,17 @@
        "url": "https://github.com/0xProject/0x-monorepo"
    },
    "license": "Apache-2.0",
-    "engines": {
-        "node": ">=6.0.0"
-    },
    "devDependencies": {
-        "@0xproject/dev-utils": "^0.3.4",
-        "@0xproject/monorepo-scripts": "^0.1.16",
-        "@0xproject/tslint-config": "^0.4.14",
-        "@types/bintrees": "^1.0.2",
+        "@0xproject/abi-gen": "^0.3.0",
+        "@0xproject/dev-utils": "^0.4.2",
+        "@0xproject/migrations": "^0.0.6",
+        "@0xproject/monorepo-scripts": "^0.1.20",
+        "@0xproject/sol-compiler": "^0.5.0",
+        "@0xproject/tslint-config": "^0.4.18",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^2.2.42",
        "@types/node": "^8.0.53",
-        "@types/request": "2.47.0",
        "@types/sinon": "^2.2.2",
-        "@types/uuid": "^3.4.2",
        "awesome-typescript-loader": "^3.1.3",
        "chai": "^4.0.1",
        "chai-as-promised": "^7.1.0",
@@ -77,39 +86,33 @@
        "copyfiles": "^1.2.0",
        "dirty-chai": "^2.0.1",
        "json-loader": "^0.5.4",
+        "make-promises-safe": "^1.1.0",
        "mocha": "^4.0.1",
        "npm-run-all": "^4.1.2",
        "nyc": "^11.0.1",
        "opn-cli": "^3.1.0",
-        "prettier": "^1.11.1",
-        "request": "^2.81.0",
        "shx": "^0.2.2",
        "sinon": "^4.0.0",
        "source-map-support": "^0.5.0",
-        "truffle-hdwallet-provider": "^0.0.3",
        "tslint": "5.8.0",
        "typedoc": "0xProject/typedoc",
        "typescript": "2.7.1",
        "webpack": "^3.1.0"
    },
    "dependencies": {
-        "@0xproject/assert": "^0.2.5",
-        "@0xproject/base-contract": "^0.1.0",
-        "@0xproject/json-schemas": "^0.7.19",
-        "@0xproject/types": "^0.5.0",
-        "@0xproject/typescript-typings": "^0.0.3",
-        "@0xproject/utils": "^0.5.0",
-        "@0xproject/web3-wrapper": "^0.5.0",
-        "bintrees": "^1.0.2",
-        "bn.js": "^4.11.8",
-        "ethereumjs-abi": "^0.6.4",
-        "ethereumjs-blockstream": "^2.0.6",
-        "ethereumjs-util": "^5.1.1",
-        "ethers-contracts": "^2.2.1",
-        "js-sha3": "^0.7.0",
-        "lodash": "^4.17.4",
-        "uuid": "^3.1.0",
-        "web3": "^0.20.0"
+        "@0xproject/assert": "^0.2.10",
+        "@0xproject/base-contract": "^0.3.2",
+        "@0xproject/contract-wrappers": "^0.0.2",
+        "@0xproject/order-utils": "0.0.5",
+        "@0xproject/order-watcher": "^0.0.2",
+        "@0xproject/sol-compiler": "^0.5.0",
+        "@0xproject/types": "0.7.0",
+        "@0xproject/typescript-typings": "^0.3.2",
+        "@0xproject/utils": "^0.6.2",
+        "@0xproject/web3-wrapper": "^0.6.4",
+        "ethereum-types": "^0.0.1",
+        "ethers": "^3.0.15",
+        "lodash": "^4.17.4"
    },
    "publishConfig": {
        "access": "public"
--- a/packages/0x.js/src/0x.ts
+++ b/packages/0x.js/src/0x.ts
@@ -1,26 +1,26 @@
-import { schemas, SchemaValidator } from '@0xproject/json-schemas';
+import { assert } from '@0xproject/assert';
+import {
+    ContractWrappers,
+    ContractWrappersConfig,
+    EtherTokenWrapper,
+    ExchangeWrapper,
+    TokenRegistryWrapper,
+    TokenTransferProxyWrapper,
+    TokenWrapper,
+} from '@0xproject/contract-wrappers';
+import {
+    generatePseudoRandomSalt,
+    getOrderHashHex,
+    isValidOrderHash,
+    isValidSignature,
+    signOrderHashAsync,
+} from '@0xproject/order-utils';
+import { OrderWatcher, OrderWatcherConfig } from '@0xproject/order-watcher';
 import { ECSignature, Order, Provider, SignedOrder, TransactionReceiptWithDecodedLogs } from '@0xproject/types';
-import { AbiDecoder, BigNumber, intervalUtils } from '@0xproject/utils';
+import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
-import * as ethUtil from 'ethereumjs-util';
-import * as _ from 'lodash';

-import { artifacts } from './artifacts';
-import { EtherTokenWrapper } from './contract_wrappers/ether_token_wrapper';
-import { ExchangeWrapper } from './contract_wrappers/exchange_wrapper';
-import { TokenRegistryWrapper } from './contract_wrappers/token_registry_wrapper';
-import { TokenTransferProxyWrapper } from './contract_wrappers/token_transfer_proxy_wrapper';
-import { TokenWrapper } from './contract_wrappers/token_wrapper';
-import { OrderStateWatcher } from './order_watcher/order_state_watcher';
-import { zeroExConfigSchema } from './schemas/zero_ex_config_schema';
-import { zeroExPrivateNetworkConfigSchema } from './schemas/zero_ex_private_network_config_schema';
-import { zeroExPublicNetworkConfigSchema } from './schemas/zero_ex_public_network_config_schema';
-import { OrderStateWatcherConfig, ZeroExConfig, ZeroExError } from './types';
-import { assert } from './utils/assert';
 import { constants } from './utils/constants';
-import { decorators } from './utils/decorators';
-import { signatureUtils } from './utils/signature_utils';
-import { utils } from './utils/utils';

 /**
 * The ZeroEx class is the single entry-point into the 0x.js library. It contains all of the library's functionality
@@ -33,7 +33,6 @@ export class ZeroEx {
     * this constant for your convenience.
     */
    public static NULL_ADDRESS = constants.NULL_ADDRESS;
-
    /**
     * An instance of the ExchangeWrapper class containing methods for interacting with the 0x Exchange smart contract.
     */
@@ -57,7 +56,16 @@ export class ZeroEx {
     * tokenTransferProxy smart contract.
     */
    public proxy: TokenTransferProxyWrapper;
-    private _web3Wrapper: Web3Wrapper;
+    private _contractWrappers: ContractWrappers;
+    /**
+     * Generates a pseudo-random 256-bit salt.
+     * The salt can be included in a 0x order, ensuring that the order generates a unique orderHash
+     * and will not collide with other outstanding orders that are identical in all other parameters.
+     * @return  A pseudo-random 256-bit number that can be used as a salt.
+     */
+    public static generatePseudoRandomSalt(): BigNumber {
+        return generatePseudoRandomSalt();
+    }
    /**
     * Verifies that the elliptic curve signature `signature` was generated
     * by signing `data` with the private key corresponding to the `signerAddress` address.
@@ -67,27 +75,15 @@ export class ZeroEx {
     * @return  Whether the signature is valid for the supplied signerAddress and data.
     */
    public static isValidSignature(data: string, signature: ECSignature, signerAddress: string): boolean {
-        assert.isHexString('data', data);
-        assert.doesConformToSchema('signature', signature, schemas.ecSignatureSchema);
-        assert.isETHAddressHex('signerAddress', signerAddress);
-        const normalizedSignerAddress = signerAddress.toLowerCase();
-
-        const isValidSignature = signatureUtils.isValidSignature(data, signature, normalizedSignerAddress);
-        return isValidSignature;
+        return isValidSignature(data, signature, signerAddress);
    }
    /**
-     * Generates a pseudo-random 256-bit salt.
-     * The salt can be included in a 0x order, ensuring that the order generates a unique orderHash
-     * and will not collide with other outstanding orders that are identical in all other parameters.
-     * @return  A pseudo-random 256-bit number that can be used as a salt.
+     * Computes the orderHash for a supplied order.
+     * @param   order   An object that conforms to the Order or SignedOrder interface definitions.
+     * @return  The resulting orderHash from hashing the supplied order.
     */
-    public static generatePseudoRandomSalt(): BigNumber {
-        // BigNumber.random returns a pseudo-random number between 0 & 1 with a passed in number of decimal places.
-        // Source: https://mikemcl.github.io/bignumber.js/#random
-        const randomNumber = BigNumber.random(constants.MAX_DIGITS_IN_UNSIGNED_256_INT);
-        const factor = new BigNumber(10).pow(constants.MAX_DIGITS_IN_UNSIGNED_256_INT - 1);
-        const salt = randomNumber.times(factor).round();
-        return salt;
+    public static getOrderHashHex(order: Order | SignedOrder): string {
+        return getOrderHashHex(order);
    }
    /**
     * Checks if the supplied hex encoded order hash is valid.
@@ -97,12 +93,7 @@ export class ZeroEx {
     * @return  Whether the supplied orderHash has the expected format.
     */
    public static isValidOrderHash(orderHash: string): boolean {
-        // Since this method can be called to check if any arbitrary string conforms to an orderHash's
-        // format, we only assert that we were indeed passed a string.
-        assert.isString('orderHash', orderHash);
-        const schemaValidator = new SchemaValidator();
-        const isValidOrderHash = schemaValidator.validate(orderHash, schemas.orderHashSchema).valid;
-        return isValidOrderHash;
+        return isValidOrderHash(orderHash);
    }
    /**
     * A unit amount is defined as the amount of a token above the specified decimal places (integer part).
@@ -132,17 +123,6 @@ export class ZeroEx {
        const baseUnitAmount = Web3Wrapper.toBaseUnitAmount(amount, decimals);
        return baseUnitAmount;
    }
-    /**
-     * Computes the orderHash for a supplied order.
-     * @param   order   An object that conforms to the Order or SignedOrder interface definitions.
-     * @return  The resulting orderHash from hashing the supplied order.
-     */
-    @decorators.syncZeroExErrorHandler
-    public static getOrderHashHex(order: Order | SignedOrder): string {
-        assert.doesConformToSchema('order', order, schemas.orderSchema);
-        const orderHashHex = utils.getOrderHashHex(order);
-        return orderHashHex;
-    }
    /**
     * Instantiates a new ZeroEx instance that provides the public interface to the 0x.js library.
     * @param   provider    The Provider instance you would like the 0x.js library to use for interacting with
@@ -150,40 +130,15 @@ export class ZeroEx {
     * @param   config      The configuration object. Look up the type for the description.
     * @return  An instance of the 0x.js ZeroEx class.
     */
-    constructor(provider: Provider, config: ZeroExConfig) {
+    constructor(provider: Provider, config: ContractWrappersConfig) {
        assert.isWeb3Provider('provider', provider);
-        assert.doesConformToSchema('config', config, zeroExConfigSchema, [
-            zeroExPrivateNetworkConfigSchema,
-            zeroExPublicNetworkConfigSchema,
-        ]);
-        const artifactJSONs = _.values(artifacts);
-        const abiArrays = _.map(artifactJSONs, artifact => artifact.abi);
-        const defaults = {
-            gasPrice: config.gasPrice,
-        };
-        this._web3Wrapper = new Web3Wrapper(provider, defaults);
-        _.forEach(abiArrays, abi => {
-            this._web3Wrapper.abiDecoder.addABI(abi);
-        });
-        this.proxy = new TokenTransferProxyWrapper(
-            this._web3Wrapper,
-            config.networkId,
-            config.tokenTransferProxyContractAddress,
-        );
-        this.token = new TokenWrapper(this._web3Wrapper, config.networkId, this.proxy);
-        this.exchange = new ExchangeWrapper(
-            this._web3Wrapper,
-            config.networkId,
-            this.token,
-            config.exchangeContractAddress,
-            config.zrxContractAddress,
-        );
-        this.tokenRegistry = new TokenRegistryWrapper(
-            this._web3Wrapper,
-            config.networkId,
-            config.tokenRegistryContractAddress,
-        );
-        this.etherToken = new EtherTokenWrapper(this._web3Wrapper, config.networkId, this.token);
+        this._contractWrappers = new ContractWrappers(provider, config);
+
+        this.proxy = this._contractWrappers.proxy;
+        this.token = this._contractWrappers.token;
+        this.exchange = this._contractWrappers.exchange;
+        this.tokenRegistry = this._contractWrappers.tokenRegistry;
+        this.etherToken = this._contractWrappers.etherToken;
    }
    /**
     * Sets a new web3 provider for 0x.js. Updating the provider will stop all
@@ -192,24 +147,23 @@ export class ZeroEx {
     * @param   networkId   The id of the network your provider is connected to
     */
    public setProvider(provider: Provider, networkId: number): void {
-        this._web3Wrapper.setProvider(provider);
-        (this.exchange as any)._invalidateContractInstances();
-        (this.exchange as any)._setNetworkId(networkId);
-        (this.tokenRegistry as any)._invalidateContractInstance();
-        (this.tokenRegistry as any)._setNetworkId(networkId);
-        (this.token as any)._invalidateContractInstances();
-        (this.token as any)._setNetworkId(networkId);
-        (this.proxy as any)._invalidateContractInstance();
-        (this.proxy as any)._setNetworkId(networkId);
-        (this.etherToken as any)._invalidateContractInstance();
-        (this.etherToken as any)._setNetworkId(networkId);
+        this._contractWrappers.setProvider(provider, networkId);
+    }
+    /**
+     * Get the provider instance currently used by 0x.js
+     * @return  Web3 provider instance
+     */
+    public getProvider(): Provider {
+        return this._contractWrappers.getProvider();
    }
    /**
     * Get user Ethereum addresses available through the supplied web3 provider available for sending transactions.
     * @return  An array of available user Ethereum addresses.
     */
    public async getAvailableAddressesAsync(): Promise<string[]> {
-        const availableAddresses = await this._web3Wrapper.getAvailableAddressesAsync();
+        // Hack: Get Web3Wrapper from ContractWrappers
+        const web3Wrapper: Web3Wrapper = (this._contractWrappers as any)._web3Wrapper;
+        const availableAddresses = await web3Wrapper.getAvailableAddressesAsync();
        return availableAddresses;
    }
    /**
@@ -229,41 +183,12 @@ export class ZeroEx {
        signerAddress: string,
        shouldAddPersonalMessagePrefix: boolean,
    ): Promise<ECSignature> {
-        assert.isHexString('orderHash', orderHash);
-        await assert.isSenderAddressAsync('signerAddress', signerAddress, this._web3Wrapper);
-        const normalizedSignerAddress = signerAddress.toLowerCase();
-
-        let msgHashHex = orderHash;
-        if (shouldAddPersonalMessagePrefix) {
-            const orderHashBuff = ethUtil.toBuffer(orderHash);
-            const msgHashBuff = ethUtil.hashPersonalMessage(orderHashBuff);
-            msgHashHex = ethUtil.bufferToHex(msgHashBuff);
-        }
-
-        const signature = await this._web3Wrapper.signMessageAsync(normalizedSignerAddress, msgHashHex);
-
-        // HACK: There is no consensus on whether the signatureHex string should be formatted as
-        // v + r + s OR r + s + v, and different clients (even different versions of the same client)
-        // return the signature params in different orders. In order to support all client implementations,
-        // we parse the signature in both ways, and evaluate if either one is a valid signature.
-        const validVParamValues = [27, 28];
-        const ecSignatureVRS = signatureUtils.parseSignatureHexAsVRS(signature);
-        if (_.includes(validVParamValues, ecSignatureVRS.v)) {
-            const isValidVRSSignature = ZeroEx.isValidSignature(orderHash, ecSignatureVRS, normalizedSignerAddress);
-            if (isValidVRSSignature) {
-                return ecSignatureVRS;
-            }
-        }
-
-        const ecSignatureRSV = signatureUtils.parseSignatureHexAsRSV(signature);
-        if (_.includes(validVParamValues, ecSignatureRSV.v)) {
-            const isValidRSVSignature = ZeroEx.isValidSignature(orderHash, ecSignatureRSV, normalizedSignerAddress);
-            if (isValidRSVSignature) {
-                return ecSignatureRSV;
-            }
-        }
-
-        throw new Error(ZeroExError.InvalidSignature);
+        return signOrderHashAsync(
+            this._contractWrappers.getProvider(),
+            orderHash,
+            signerAddress,
+            shouldAddPersonalMessagePrefix,
+        );
    }
    /**
     * Waits for a transaction to be mined and returns the transaction receipt.
@@ -274,10 +199,12 @@ export class ZeroEx {
     */
    public async awaitTransactionMinedAsync(
        txHash: string,
-        pollingIntervalMs = 1000,
+        pollingIntervalMs: number = 1000,
        timeoutMs?: number,
    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const transactionReceiptWithDecodedLogs = await this._web3Wrapper.awaitTransactionMinedAsync(
+        // Hack: Get Web3Wrapper from ContractWrappers
+        const web3Wrapper: Web3Wrapper = (this._contractWrappers as any)._web3Wrapper;
+        const transactionReceiptWithDecodedLogs = await web3Wrapper.awaitTransactionMinedAsync(
            txHash,
            pollingIntervalMs,
            timeoutMs,
@@ -285,22 +212,17 @@ export class ZeroEx {
        return transactionReceiptWithDecodedLogs;
    }
    /**
-     * Instantiates and returns a new OrderStateWatcher instance.
+     * Instantiates and returns a new OrderWatcher instance.
     * Defaults to watching the pending state.
     * @param   config      The configuration object. Look up the type for the description.
-     * @return  An instance of the 0x.js OrderStateWatcher class.
+     * @return  An instance of the 0x.js OrderWatcher class.
     */
-    public createOrderStateWatcher(config?: OrderStateWatcherConfig) {
-        return new OrderStateWatcher(this._web3Wrapper, this.token, this.exchange, config);
-    }
-    /*
-     * HACK: `TokenWrapper` needs a token transfer proxy address. `TokenTransferProxy` address is fetched from
-     * an `ExchangeWrapper`. `ExchangeWrapper` needs `TokenWrapper` to validate orders, creating a dependency cycle.
-     * In order to break this - we create this function here and pass it as a parameter to the `TokenWrapper`
-     * and `ProxyWrapper`.
-     */
-    private async _getTokenTransferProxyAddressAsync(): Promise<string> {
-        const tokenTransferProxyAddress = await (this.exchange as any)._getTokenTransferProxyAddressAsync();
-        return tokenTransferProxyAddress;
+    public async createOrderWatcherAsync(config?: OrderWatcherConfig): Promise<OrderWatcher> {
+        // Hack: Get Web3Wrapper from ContractWrappers
+        const web3Wrapper: Web3Wrapper = (this._contractWrappers as any)._web3Wrapper;
+        const networkId = await web3Wrapper.getNetworkIdAsync();
+        const provider = this._contractWrappers.getProvider();
+        const orderWatcher = new OrderWatcher(provider, networkId, config);
+        return orderWatcher;
    }
 }
--- a/packages/0x.js/src/artifacts.ts
+++ b/packages/0x.js/src/artifacts.ts
@@ -1,18 +0,0 @@
-import * as DummyTokenArtifact from './artifacts/DummyToken.json';
-import * as EtherTokenArtifact from './artifacts/EtherToken.json';
-import * as ExchangeArtifact from './artifacts/Exchange.json';
-import * as TokenArtifact from './artifacts/Token.json';
-import * as TokenRegistryArtifact from './artifacts/TokenRegistry.json';
-import * as TokenTransferProxyArtifact from './artifacts/TokenTransferProxy.json';
-import * as ZRXArtifact from './artifacts/ZRX.json';
-import { Artifact } from './types';
-
-export const artifacts = {
-    ZRXArtifact: (ZRXArtifact as any) as Artifact,
-    DummyTokenArtifact: (DummyTokenArtifact as any) as Artifact,
-    TokenArtifact: (TokenArtifact as any) as Artifact,
-    ExchangeArtifact: (ExchangeArtifact as any) as Artifact,
-    EtherTokenArtifact: (EtherTokenArtifact as any) as Artifact,
-    TokenRegistryArtifact: (TokenRegistryArtifact as any) as Artifact,
-    TokenTransferProxyArtifact: (TokenTransferProxyArtifact as any) as Artifact,
-};
--- a/packages/0x.js/src/compact_artifacts/DummyToken.json
+++ b/packages/0x.js/src/compact_artifacts/DummyToken.json
--- a/packages/0x.js/src/compact_artifacts/EtherToken.json
+++ b/packages/0x.js/src/compact_artifacts/EtherToken.json
--- a/packages/0x.js/src/compact_artifacts/Exchange.json
+++ b/packages/0x.js/src/compact_artifacts/Exchange.json
--- a/packages/0x.js/src/compact_artifacts/Token.json
+++ b/packages/0x.js/src/compact_artifacts/Token.json
--- a/packages/0x.js/src/compact_artifacts/TokenRegistry.json
+++ b/packages/0x.js/src/compact_artifacts/TokenRegistry.json
--- a/packages/0x.js/src/compact_artifacts/TokenTransferProxy.json
+++ b/packages/0x.js/src/compact_artifacts/TokenTransferProxy.json
--- a/packages/0x.js/src/compact_artifacts/ZRX.json
+++ b/packages/0x.js/src/compact_artifacts/ZRX.json
--- a/packages/0x.js/src/index.ts
+++ b/packages/0x.js/src/index.ts
@@ -1,61 +1,51 @@
 export { ZeroEx } from './0x';

-export {
-    ZeroExError,
-    EventCallback,
-    ExchangeContractErrs,
-    ContractEvent,
-    Token,
-    IndexedFilterValues,
-    BlockRange,
-    OrderCancellationRequest,
-    OrderFillRequest,
-    ContractEventArgs,
-    ZeroExConfig,
-    MethodOpts,
-    OrderTransactionOpts,
-    TransactionOpts,
-    LogEvent,
-    DecodedLogEvent,
-    EventWatcherCallback,
-    OnOrderStateChangeCallback,
-    OrderStateValid,
-    OrderStateInvalid,
-    OrderState,
-} from './types';
-
 export {
    BlockParamLiteral,
    FilterObject,
    BlockParam,
    ContractEventArg,
+    ExchangeContractErrs,
    LogWithDecodedArgs,
    Order,
    Provider,
    SignedOrder,
    ECSignature,
+    OrderStateValid,
+    OrderStateInvalid,
+    OrderState,
+    Token,
    TransactionReceipt,
    TransactionReceiptWithDecodedLogs,
 } from '@0xproject/types';

 export {
+    EventCallback,
+    ContractEvent,
+    IndexedFilterValues,
+    BlockRange,
+    OrderCancellationRequest,
+    OrderFillRequest,
+    ContractEventArgs,
+    MethodOpts,
+    OrderTransactionOpts,
+    TransactionOpts,
+    LogEvent,
+    DecodedLogEvent,
+    OnOrderStateChangeCallback,
+    ContractWrappersError,
    EtherTokenContractEventArgs,
    WithdrawalContractEventArgs,
    DepositContractEventArgs,
    EtherTokenEvents,
-} from './contract_wrappers/generated/ether_token';
-
-export {
    TransferContractEventArgs,
    ApprovalContractEventArgs,
    TokenContractEventArgs,
    TokenEvents,
-} from './contract_wrappers/generated/token';
-
-export {
    LogErrorContractEventArgs,
    LogCancelContractEventArgs,
    LogFillContractEventArgs,
    ExchangeContractEventArgs,
    ExchangeEvents,
-} from './contract_wrappers/generated/exchange';
+    ContractWrappersConfig,
+} from '@0xproject/contract-wrappers';
--- a/packages/0x.js/src/order_watcher/remaining_fillable_calculator.ts
+++ b/packages/0x.js/src/order_watcher/remaining_fillable_calculator.ts
@@ -1,95 +0,0 @@
-import { SignedOrder } from '@0xproject/types';
-import { BigNumber } from '@0xproject/utils';
-
-export class RemainingFillableCalculator {
-    private _signedOrder: SignedOrder;
-    private _isMakerTokenZRX: boolean;
-    // Transferrable Amount is the minimum of Approval and Balance
-    private _transferrableMakerTokenAmount: BigNumber;
-    private _transferrableMakerFeeTokenAmount: BigNumber;
-    private _remainingMakerTokenAmount: BigNumber;
-    private _remainingMakerFeeAmount: BigNumber;
-    constructor(
-        signedOrder: SignedOrder,
-        isMakerTokenZRX: boolean,
-        transferrableMakerTokenAmount: BigNumber,
-        transferrableMakerFeeTokenAmount: BigNumber,
-        remainingMakerTokenAmount: BigNumber,
-    ) {
-        this._signedOrder = signedOrder;
-        this._isMakerTokenZRX = isMakerTokenZRX;
-        this._transferrableMakerTokenAmount = transferrableMakerTokenAmount;
-        this._transferrableMakerFeeTokenAmount = transferrableMakerFeeTokenAmount;
-        this._remainingMakerTokenAmount = remainingMakerTokenAmount;
-        this._remainingMakerFeeAmount = remainingMakerTokenAmount
-            .times(signedOrder.makerFee)
-            .dividedToIntegerBy(signedOrder.makerTokenAmount);
-    }
-    public computeRemainingMakerFillable(): BigNumber {
-        if (this._hasSufficientFundsForFeeAndTransferAmount()) {
-            return this._remainingMakerTokenAmount;
-        }
-        if (this._signedOrder.makerFee.isZero()) {
-            return BigNumber.min(this._remainingMakerTokenAmount, this._transferrableMakerTokenAmount);
-        }
-        return this._calculatePartiallyFillableMakerTokenAmount();
-    }
-    public computeRemainingTakerFillable(): BigNumber {
-        return this.computeRemainingMakerFillable()
-            .times(this._signedOrder.takerTokenAmount)
-            .dividedToIntegerBy(this._signedOrder.makerTokenAmount);
-    }
-    private _hasSufficientFundsForFeeAndTransferAmount(): boolean {
-        if (this._isMakerTokenZRX) {
-            const totalZRXTransferAmountRequired = this._remainingMakerTokenAmount.plus(this._remainingMakerFeeAmount);
-            const hasSufficientFunds = this._transferrableMakerTokenAmount.greaterThanOrEqualTo(
-                totalZRXTransferAmountRequired,
-            );
-            return hasSufficientFunds;
-        } else {
-            const hasSufficientFundsForTransferAmount = this._transferrableMakerTokenAmount.greaterThanOrEqualTo(
-                this._remainingMakerTokenAmount,
-            );
-            const hasSufficientFundsForFeeAmount = this._transferrableMakerFeeTokenAmount.greaterThanOrEqualTo(
-                this._remainingMakerFeeAmount,
-            );
-            const hasSufficientFunds = hasSufficientFundsForTransferAmount && hasSufficientFundsForFeeAmount;
-            return hasSufficientFunds;
-        }
-    }
-    private _calculatePartiallyFillableMakerTokenAmount(): BigNumber {
-        // Given an order for 200 wei for 2 ZRXwei fee, find 100 wei for 1 ZRXwei. Order ratio is then 100:1
-        const orderToFeeRatio = this._signedOrder.makerTokenAmount.dividedBy(this._signedOrder.makerFee);
-        // The number of times the maker can fill the order, if each fill only required the transfer of a single
-        // baseUnit of fee tokens.
-        // Given 2 ZRXwei, the maximum amount of times Maker can fill this order, in terms of fees, is 2
-        const fillableTimesInFeeTokenBaseUnits = BigNumber.min(
-            this._transferrableMakerFeeTokenAmount,
-            this._remainingMakerFeeAmount,
-        );
-        // The number of times the Maker can fill the order, given the Maker Token Balance
-        // Assuming a balance of 150 wei, and an orderToFeeRatio of 100:1, maker can fill this order 1 time.
-        let fillableTimesInMakerTokenUnits = this._transferrableMakerTokenAmount.dividedBy(orderToFeeRatio);
-        if (this._isMakerTokenZRX) {
-            // If ZRX is the maker token, the Fee and the Maker amount need to be removed from the same pool;
-            // 200 ZRXwei for 2ZRXwei fee can only be filled once (need 202 ZRXwei)
-            const totalZRXTokenPooled = this._transferrableMakerTokenAmount;
-            // The purchasing power here is less as the tokens are taken from the same Pool
-            // For every one number of fills, we have to take an extra ZRX out of the pool
-            fillableTimesInMakerTokenUnits = totalZRXTokenPooled.dividedBy(orderToFeeRatio.plus(new BigNumber(1)));
-        }
-        // When Ratio is not fully divisible there can be remainders which cannot be represented, so they are floored.
-        // This can result in a RoundingError being thrown by the Exchange Contract.
-        const partiallyFillableMakerTokenAmount = fillableTimesInMakerTokenUnits
-            .times(this._signedOrder.makerTokenAmount)
-            .dividedToIntegerBy(this._signedOrder.makerFee);
-        const partiallyFillableFeeTokenAmount = fillableTimesInFeeTokenBaseUnits
-            .times(this._signedOrder.makerTokenAmount)
-            .dividedToIntegerBy(this._signedOrder.makerFee);
-        const partiallyFillableAmount = BigNumber.min(
-            partiallyFillableMakerTokenAmount,
-            partiallyFillableFeeTokenAmount,
-        );
-        return partiallyFillableAmount;
-    }
-}
--- a/packages/0x.js/src/schemas/zero_ex_public_network_config_schema.ts
+++ b/packages/0x.js/src/schemas/zero_ex_public_network_config_schema.ts
@@ -1,9 +1,23 @@
+const networkNameToId: { [networkName: string]: number } = {
+    mainnet: 1,
+    ropsten: 3,
+    rinkeby: 4,
+    kovan: 42,
+    ganache: 50,
+};
+
 export const zeroExPublicNetworkConfigSchema = {
    id: '/ZeroExPublicNetworkConfig',
    properties: {
        networkId: {
            type: 'number',
-            enum: [1, 3, 4, 42, 50],
+            enum: [
+                networkNameToId.mainnet,
+                networkNameToId.ropsten,
+                networkNameToId.rinkeby,
+                networkNameToId.kovan,
+                networkNameToId.ganache,
+            ],
        },
        gasPrice: { $ref: '/Number' },
        zrxContractAddress: { $ref: '/Address' },
--- a/packages/0x.js/src/types.ts
+++ b/packages/0x.js/src/types.ts
@@ -1,277 +1,7 @@
-import { BigNumber } from '@0xproject/utils';
-
-import {
-    BlockParam,
-    BlockParamLiteral,
-    ContractAbi,
-    ContractEventArg,
-    FilterObject,
-    LogEntryEvent,
-    LogWithDecodedArgs,
-    Order,
-    SignedOrder,
-} from '@0xproject/types';
-
-import * as Web3 from 'web3';
-
-import { EtherTokenContractEventArgs, EtherTokenEvents } from './contract_wrappers/generated/ether_token';
-import { ExchangeContractEventArgs, ExchangeEvents } from './contract_wrappers/generated/exchange';
-import { TokenContractEventArgs, TokenEvents } from './contract_wrappers/generated/token';
-
-export enum ZeroExError {
-    ExchangeContractDoesNotExist = 'EXCHANGE_CONTRACT_DOES_NOT_EXIST',
-    ZRXContractDoesNotExist = 'ZRX_CONTRACT_DOES_NOT_EXIST',
-    EtherTokenContractDoesNotExist = 'ETHER_TOKEN_CONTRACT_DOES_NOT_EXIST',
-    TokenTransferProxyContractDoesNotExist = 'TOKEN_TRANSFER_PROXY_CONTRACT_DOES_NOT_EXIST',
-    TokenRegistryContractDoesNotExist = 'TOKEN_REGISTRY_CONTRACT_DOES_NOT_EXIST',
-    TokenContractDoesNotExist = 'TOKEN_CONTRACT_DOES_NOT_EXIST',
-    UnhandledError = 'UNHANDLED_ERROR',
-    UserHasNoAssociatedAddress = 'USER_HAS_NO_ASSOCIATED_ADDRESSES',
-    InvalidSignature = 'INVALID_SIGNATURE',
-    ContractNotDeployedOnNetwork = 'CONTRACT_NOT_DEPLOYED_ON_NETWORK',
-    InsufficientAllowanceForTransfer = 'INSUFFICIENT_ALLOWANCE_FOR_TRANSFER',
-    InsufficientBalanceForTransfer = 'INSUFFICIENT_BALANCE_FOR_TRANSFER',
-    InsufficientEthBalanceForDeposit = 'INSUFFICIENT_ETH_BALANCE_FOR_DEPOSIT',
-    InsufficientWEthBalanceForWithdrawal = 'INSUFFICIENT_WETH_BALANCE_FOR_WITHDRAWAL',
-    InvalidJump = 'INVALID_JUMP',
-    OutOfGas = 'OUT_OF_GAS',
-    NoNetworkId = 'NO_NETWORK_ID',
-    SubscriptionNotFound = 'SUBSCRIPTION_NOT_FOUND',
-    SubscriptionAlreadyPresent = 'SUBSCRIPTION_ALREADY_PRESENT',
-}
-
 export enum InternalZeroExError {
    NoAbiDecoder = 'NO_ABI_DECODER',
    ZrxNotInTokenRegistry = 'ZRX_NOT_IN_TOKEN_REGISTRY',
    WethNotInTokenRegistry = 'WETH_NOT_IN_TOKEN_REGISTRY',
 }

-export type OrderAddresses = [string, string, string, string, string];
-
-export type OrderValues = [BigNumber, BigNumber, BigNumber, BigNumber, BigNumber, BigNumber];
-
-export type LogEvent = LogEntryEvent;
-export interface DecodedLogEvent<ArgsType> {
-    isRemoved: boolean;
-    log: LogWithDecodedArgs<ArgsType>;
-}
-
-export type EventCallback<ArgsType> = (err: null | Error, log?: DecodedLogEvent<ArgsType>) => void;
-export type EventWatcherCallback = (err: null | Error, log?: LogEvent) => void;
-
-export enum ExchangeContractErrCodes {
-    ERROR_FILL_EXPIRED, // Order has already expired
-    ERROR_FILL_NO_VALUE, // Order has already been fully filled or cancelled
-    ERROR_FILL_TRUNCATION, // Rounding error too large
-    ERROR_FILL_BALANCE_ALLOWANCE, // Insufficient balance or allowance for token transfer
-    ERROR_CANCEL_EXPIRED, // Order has already expired
-    ERROR_CANCEL_NO_VALUE, // Order has already been fully filled or cancelled
-}
-
-export enum ExchangeContractErrs {
-    OrderFillExpired = 'ORDER_FILL_EXPIRED',
-    OrderCancelExpired = 'ORDER_CANCEL_EXPIRED',
-    OrderCancelAmountZero = 'ORDER_CANCEL_AMOUNT_ZERO',
-    OrderAlreadyCancelledOrFilled = 'ORDER_ALREADY_CANCELLED_OR_FILLED',
-    OrderFillAmountZero = 'ORDER_FILL_AMOUNT_ZERO',
-    OrderRemainingFillAmountZero = 'ORDER_REMAINING_FILL_AMOUNT_ZERO',
-    OrderFillRoundingError = 'ORDER_FILL_ROUNDING_ERROR',
-    FillBalanceAllowanceError = 'FILL_BALANCE_ALLOWANCE_ERROR',
-    InsufficientTakerBalance = 'INSUFFICIENT_TAKER_BALANCE',
-    InsufficientTakerAllowance = 'INSUFFICIENT_TAKER_ALLOWANCE',
-    InsufficientMakerBalance = 'INSUFFICIENT_MAKER_BALANCE',
-    InsufficientMakerAllowance = 'INSUFFICIENT_MAKER_ALLOWANCE',
-    InsufficientTakerFeeBalance = 'INSUFFICIENT_TAKER_FEE_BALANCE',
-    InsufficientTakerFeeAllowance = 'INSUFFICIENT_TAKER_FEE_ALLOWANCE',
-    InsufficientMakerFeeBalance = 'INSUFFICIENT_MAKER_FEE_BALANCE',
-    InsufficientMakerFeeAllowance = 'INSUFFICIENT_MAKER_FEE_ALLOWANCE',
-    TransactionSenderIsNotFillOrderTaker = 'TRANSACTION_SENDER_IS_NOT_FILL_ORDER_TAKER',
-    MultipleMakersInSingleCancelBatchDisallowed = 'MULTIPLE_MAKERS_IN_SINGLE_CANCEL_BATCH_DISALLOWED',
-    InsufficientRemainingFillAmount = 'INSUFFICIENT_REMAINING_FILL_AMOUNT',
-    MultipleTakerTokensInFillUpToDisallowed = 'MULTIPLE_TAKER_TOKENS_IN_FILL_UP_TO_DISALLOWED',
-    BatchOrdersMustHaveSameExchangeAddress = 'BATCH_ORDERS_MUST_HAVE_SAME_EXCHANGE_ADDRESS',
-    BatchOrdersMustHaveAtLeastOneItem = 'BATCH_ORDERS_MUST_HAVE_AT_LEAST_ONE_ITEM',
-}
-
-export interface ContractEvent {
-    logIndex: number;
-    transactionIndex: number;
-    transactionHash: string;
-    blockHash: string;
-    blockNumber: number;
-    address: string;
-    type: string;
-    event: string;
-    args: ContractEventArgs;
-}
-
-export type ContractEventArgs = ExchangeContractEventArgs | TokenContractEventArgs | EtherTokenContractEventArgs;
-
-//                          [address, name, symbol, decimals, ipfsHash, swarmHash]
-export type TokenMetadata = [string, string, string, number, string, string];
-
-export interface Token {
-    name: string;
-    address: string;
-    symbol: string;
-    decimals: number;
-}
-
-export interface TxOpts {
-    from: string;
-    gas?: number;
-    value?: BigNumber;
-    gasPrice?: BigNumber;
-}
-
-export interface TokenAddressBySymbol {
-    [symbol: string]: string;
-}
-
-export type ContractEvents = TokenEvents | ExchangeEvents | EtherTokenEvents;
-
-export interface IndexedFilterValues {
-    [index: string]: ContractEventArg;
-}
-
-export interface BlockRange {
-    fromBlock: BlockParam;
-    toBlock: BlockParam;
-}
-
-export type DoneCallback = (err?: Error) => void;
-
-export interface OrderCancellationRequest {
-    order: Order | SignedOrder;
-    takerTokenCancelAmount: BigNumber;
-}
-
-export interface OrderFillRequest {
-    signedOrder: SignedOrder;
-    takerTokenFillAmount: BigNumber;
-}
-
-export type AsyncMethod = (...args: any[]) => Promise<any>;
-export type SyncMethod = (...args: any[]) => any;
-
-/*
- * orderExpirationCheckingIntervalMs: How often to check for expired orders. Default: 50
- * eventPollingIntervalMs: How often to poll the Ethereum node for new events. Default: 200
- * expirationMarginMs: Amount of time before order expiry that you'd like to be notified
- * of an orders expiration. Default: 0
- * cleanupJobIntervalMs: How often to run a cleanup job which revalidates all the orders. Defaults: 1h
- * stateLayer: Optional blockchain state layer OrderWatcher will monitor for new events. Default: latest
- */
-export interface OrderStateWatcherConfig {
-    orderExpirationCheckingIntervalMs?: number;
-    eventPollingIntervalMs?: number;
-    expirationMarginMs?: number;
-    cleanupJobIntervalMs?: number;
-    stateLayer: BlockParamLiteral;
-}
-
-/*
- * networkId: The id of the underlying ethereum network your provider is connected to. (1-mainnet, 3-ropsten, 4-rinkeby, 42-kovan, 50-testrpc)
- * gasPrice: Gas price to use with every transaction
- * exchangeContractAddress: The address of an exchange contract to use
- * zrxContractAddress: The address of the ZRX contract to use
- * tokenRegistryContractAddress: The address of a token registry contract to use
- * tokenTransferProxyContractAddress: The address of the token transfer proxy contract to use
- * orderWatcherConfig: All the configs related to the orderWatcher
- */
-export interface ZeroExConfig {
-    networkId: number;
-    gasPrice?: BigNumber;
-    exchangeContractAddress?: string;
-    zrxContractAddress?: string;
-    tokenRegistryContractAddress?: string;
-    tokenTransferProxyContractAddress?: string;
-    orderWatcherConfig?: OrderStateWatcherConfig;
-}
-
-export type ArtifactContractName = 'ZRX' | 'TokenTransferProxy' | 'TokenRegistry' | 'Token' | 'Exchange' | 'EtherToken';
-
-export interface Artifact {
-    contract_name: ArtifactContractName;
-    abi: ContractAbi;
-    networks: {
-        [networkId: number]: {
-            address: string;
-        };
-    };
-}
-
-/*
- * expectedFillTakerTokenAmount: If specified, the validation method will ensure that the
- * supplied order maker has a sufficient allowance/balance to fill this amount of the order's
- * takerTokenAmount. If not specified, the validation method ensures that the maker has a sufficient
- * allowance/balance to fill the entire remaining order amount.
- */
-export interface ValidateOrderFillableOpts {
-    expectedFillTakerTokenAmount?: BigNumber;
-}
-
-/*
- * defaultBlock: The block up to which to query the blockchain state. Setting this to a historical block number
- * let's the user query the blockchain's state at an arbitrary point in time. In order for this to work, the
- * backing  Ethereum node must keep the entire historical state of the chain (e.g setting `--pruning=archive`
- * flag when  running Parity).
- */
-export interface MethodOpts {
-    defaultBlock?: BlockParam;
-}
-
-/*
- * gasPrice: Gas price in Wei to use for a transaction
- * gasLimit: The amount of gas to send with a transaction
- */
-export interface TransactionOpts {
-    gasPrice?: BigNumber;
-    gasLimit?: number;
-}
-
-/*
- * shouldValidate: Flag indicating whether the library should make attempts to validate a transaction before
- * broadcasting it. For example, order has a valid signature, maker has sufficient funds, etc. Default: true
- */
-export interface OrderTransactionOpts extends TransactionOpts {
-    shouldValidate?: boolean;
-}
-
-export enum TradeSide {
-    Maker = 'maker',
-    Taker = 'taker',
-}
-
-export enum TransferType {
-    Trade = 'trade',
-    Fee = 'fee',
-}
-
-export interface OrderRelevantState {
-    makerBalance: BigNumber;
-    makerProxyAllowance: BigNumber;
-    makerFeeBalance: BigNumber;
-    makerFeeProxyAllowance: BigNumber;
-    filledTakerTokenAmount: BigNumber;
-    cancelledTakerTokenAmount: BigNumber;
-    remainingFillableMakerTokenAmount: BigNumber;
-    remainingFillableTakerTokenAmount: BigNumber;
-}
-
-export interface OrderStateValid {
-    isValid: true;
-    orderHash: string;
-    orderRelevantState: OrderRelevantState;
-}
-
-export interface OrderStateInvalid {
-    isValid: false;
-    orderHash: string;
-    error: ExchangeContractErrs;
-}
-
-export type OrderState = OrderStateValid | OrderStateInvalid;
-
-export type OnOrderStateChangeCallback = (err: Error | null, orderState?: OrderState) => void;
 // tslint:disable:max-file-line-count
--- a/packages/0x.js/src/utils/constants.ts
+++ b/packages/0x.js/src/utils/constants.ts
@@ -1,12 +1,4 @@
-import { BigNumber } from '@0xproject/utils';
-
 export const constants = {
    NULL_ADDRESS: '0x0000000000000000000000000000000000000000',
    TESTRPC_NETWORK_ID: 50,
-    MAX_DIGITS_IN_UNSIGNED_256_INT: 78,
-    INVALID_JUMP_PATTERN: 'invalid JUMP at',
-    OUT_OF_GAS_PATTERN: 'out of gas',
-    INVALID_TAKER_FORMAT: 'instance.taker is not of a type(s) string',
-    UNLIMITED_ALLOWANCE_IN_BASE_UNITS: new BigNumber(2).pow(256).minus(1),
-    DEFAULT_BLOCK_POLLING_INTERVAL: 1000,
 };
--- a/packages/0x.js/src/utils/order_state_utils.ts
+++ b/packages/0x.js/src/utils/order_state_utils.ts
@@ -1,138 +0,0 @@
-import { SignedOrder } from '@0xproject/types';
-import { BigNumber } from '@0xproject/utils';
-import * as _ from 'lodash';
-
-import { ZeroEx } from '../0x';
-import { ExchangeWrapper } from '../contract_wrappers/exchange_wrapper';
-import { RemainingFillableCalculator } from '../order_watcher/remaining_fillable_calculator';
-import { BalanceAndProxyAllowanceLazyStore } from '../stores/balance_proxy_allowance_lazy_store';
-import { OrderFilledCancelledLazyStore } from '../stores/order_filled_cancelled_lazy_store';
-import { ExchangeContractErrs, OrderRelevantState, OrderState, OrderStateInvalid, OrderStateValid } from '../types';
-
-const ACCEPTABLE_RELATIVE_ROUNDING_ERROR = 0.0001;
-
-export class OrderStateUtils {
-    private _balanceAndProxyAllowanceLazyStore: BalanceAndProxyAllowanceLazyStore;
-    private _orderFilledCancelledLazyStore: OrderFilledCancelledLazyStore;
-    private static _validateIfOrderIsValid(signedOrder: SignedOrder, orderRelevantState: OrderRelevantState): void {
-        const unavailableTakerTokenAmount = orderRelevantState.cancelledTakerTokenAmount.add(
-            orderRelevantState.filledTakerTokenAmount,
-        );
-        const availableTakerTokenAmount = signedOrder.takerTokenAmount.minus(unavailableTakerTokenAmount);
-        if (availableTakerTokenAmount.eq(0)) {
-            throw new Error(ExchangeContractErrs.OrderRemainingFillAmountZero);
-        }
-
-        if (orderRelevantState.makerBalance.eq(0)) {
-            throw new Error(ExchangeContractErrs.InsufficientMakerBalance);
-        }
-        if (orderRelevantState.makerProxyAllowance.eq(0)) {
-            throw new Error(ExchangeContractErrs.InsufficientMakerAllowance);
-        }
-        if (!signedOrder.makerFee.eq(0)) {
-            if (orderRelevantState.makerFeeBalance.eq(0)) {
-                throw new Error(ExchangeContractErrs.InsufficientMakerFeeBalance);
-            }
-            if (orderRelevantState.makerFeeProxyAllowance.eq(0)) {
-                throw new Error(ExchangeContractErrs.InsufficientMakerFeeAllowance);
-            }
-        }
-        const minFillableTakerTokenAmountWithinNoRoundingErrorRange = signedOrder.takerTokenAmount
-            .dividedBy(ACCEPTABLE_RELATIVE_ROUNDING_ERROR)
-            .dividedBy(signedOrder.makerTokenAmount);
-        if (
-            orderRelevantState.remainingFillableTakerTokenAmount.lessThan(
-                minFillableTakerTokenAmountWithinNoRoundingErrorRange,
-            )
-        ) {
-            throw new Error(ExchangeContractErrs.OrderFillRoundingError);
-        }
-    }
-    constructor(
-        balanceAndProxyAllowanceLazyStore: BalanceAndProxyAllowanceLazyStore,
-        orderFilledCancelledLazyStore: OrderFilledCancelledLazyStore,
-    ) {
-        this._balanceAndProxyAllowanceLazyStore = balanceAndProxyAllowanceLazyStore;
-        this._orderFilledCancelledLazyStore = orderFilledCancelledLazyStore;
-    }
-    public async getOrderStateAsync(signedOrder: SignedOrder): Promise<OrderState> {
-        const orderRelevantState = await this.getOrderRelevantStateAsync(signedOrder);
-        const orderHash = ZeroEx.getOrderHashHex(signedOrder);
-        try {
-            OrderStateUtils._validateIfOrderIsValid(signedOrder, orderRelevantState);
-            const orderState: OrderStateValid = {
-                isValid: true,
-                orderHash,
-                orderRelevantState,
-            };
-            return orderState;
-        } catch (err) {
-            const orderState: OrderStateInvalid = {
-                isValid: false,
-                orderHash,
-                error: err.message,
-            };
-            return orderState;
-        }
-    }
-    public async getOrderRelevantStateAsync(signedOrder: SignedOrder): Promise<OrderRelevantState> {
-        // HACK: We access the private property here but otherwise the interface will be less nice.
-        // If we pass it from the instantiator - there is no opportunity to get it there
-        // because JS doesn't support async constructors.
-        // Moreover - it's cached under the hood so it's equivalent to an async constructor.
-        const exchange = (this._orderFilledCancelledLazyStore as any)._exchange as ExchangeWrapper;
-        const zrxTokenAddress = exchange.getZRXTokenAddress();
-        const orderHash = ZeroEx.getOrderHashHex(signedOrder);
-        const makerBalance = await this._balanceAndProxyAllowanceLazyStore.getBalanceAsync(
-            signedOrder.makerTokenAddress,
-            signedOrder.maker,
-        );
-        const makerProxyAllowance = await this._balanceAndProxyAllowanceLazyStore.getProxyAllowanceAsync(
-            signedOrder.makerTokenAddress,
-            signedOrder.maker,
-        );
-        const makerFeeBalance = await this._balanceAndProxyAllowanceLazyStore.getBalanceAsync(
-            zrxTokenAddress,
-            signedOrder.maker,
-        );
-        const makerFeeProxyAllowance = await this._balanceAndProxyAllowanceLazyStore.getProxyAllowanceAsync(
-            zrxTokenAddress,
-            signedOrder.maker,
-        );
-        const filledTakerTokenAmount = await this._orderFilledCancelledLazyStore.getFilledTakerAmountAsync(orderHash);
-        const cancelledTakerTokenAmount = await this._orderFilledCancelledLazyStore.getCancelledTakerAmountAsync(
-            orderHash,
-        );
-        const unavailableTakerTokenAmount = await exchange.getUnavailableTakerAmountAsync(orderHash);
-        const totalMakerTokenAmount = signedOrder.makerTokenAmount;
-        const totalTakerTokenAmount = signedOrder.takerTokenAmount;
-        const remainingTakerTokenAmount = totalTakerTokenAmount.minus(unavailableTakerTokenAmount);
-        const remainingMakerTokenAmount = remainingTakerTokenAmount
-            .times(totalMakerTokenAmount)
-            .dividedToIntegerBy(totalTakerTokenAmount);
-        const transferrableMakerTokenAmount = BigNumber.min([makerProxyAllowance, makerBalance]);
-        const transferrableFeeTokenAmount = BigNumber.min([makerFeeProxyAllowance, makerFeeBalance]);
-
-        const isMakerTokenZRX = signedOrder.makerTokenAddress === zrxTokenAddress;
-        const remainingFillableCalculator = new RemainingFillableCalculator(
-            signedOrder,
-            isMakerTokenZRX,
-            transferrableMakerTokenAmount,
-            transferrableFeeTokenAmount,
-            remainingMakerTokenAmount,
-        );
-        const remainingFillableMakerTokenAmount = remainingFillableCalculator.computeRemainingMakerFillable();
-        const remainingFillableTakerTokenAmount = remainingFillableCalculator.computeRemainingTakerFillable();
-        const orderRelevantState = {
-            makerBalance,
-            makerProxyAllowance,
-            makerFeeBalance,
-            makerFeeProxyAllowance,
-            filledTakerTokenAmount,
-            cancelledTakerTokenAmount,
-            remainingFillableMakerTokenAmount,
-            remainingFillableTakerTokenAmount,
-        };
-        return orderRelevantState;
-    }
-}
--- a/packages/0x.js/src/utils/signature_utils.ts
+++ b/packages/0x.js/src/utils/signature_utils.ts
@@ -1,45 +0,0 @@
-import { ECSignature } from '@0xproject/types';
-import * as ethUtil from 'ethereumjs-util';
-
-export const signatureUtils = {
-    isValidSignature(data: string, signature: ECSignature, signerAddress: string): boolean {
-        const dataBuff = ethUtil.toBuffer(data);
-        const msgHashBuff = ethUtil.hashPersonalMessage(dataBuff);
-        try {
-            const pubKey = ethUtil.ecrecover(
-                msgHashBuff,
-                signature.v,
-                ethUtil.toBuffer(signature.r),
-                ethUtil.toBuffer(signature.s),
-            );
-            const retrievedAddress = ethUtil.bufferToHex(ethUtil.pubToAddress(pubKey));
-            return retrievedAddress === signerAddress;
-        } catch (err) {
-            return false;
-        }
-    },
-    parseSignatureHexAsVRS(signatureHex: string): ECSignature {
-        const signatureBuffer = ethUtil.toBuffer(signatureHex);
-        let v = signatureBuffer[0];
-        if (v < 27) {
-            v += 27;
-        }
-        const r = signatureBuffer.slice(1, 33);
-        const s = signatureBuffer.slice(33, 65);
-        const ecSignature: ECSignature = {
-            v,
-            r: ethUtil.bufferToHex(r),
-            s: ethUtil.bufferToHex(s),
-        };
-        return ecSignature;
-    },
-    parseSignatureHexAsRSV(signatureHex: string): ECSignature {
-        const { v, r, s } = ethUtil.fromRpcSig(signatureHex);
-        const ecSignature: ECSignature = {
-            v,
-            r: ethUtil.bufferToHex(r),
-            s: ethUtil.bufferToHex(s),
-        };
-        return ecSignature;
-    },
-};
--- a/packages/0x.js/src/utils/utils.ts
+++ b/packages/0x.js/src/utils/utils.ts
@@ -1,63 +0,0 @@
-import { Order, SignedOrder, SolidityTypes } from '@0xproject/types';
-import { BigNumber } from '@0xproject/utils';
-import BN = require('bn.js');
-import * as ethABI from 'ethereumjs-abi';
-import * as ethUtil from 'ethereumjs-util';
-import * as _ from 'lodash';
-
-export const utils = {
-    /**
-     * Converts BigNumber instance to BN
-     * The only reason we convert to BN is to remain compatible with `ethABI. soliditySHA3` that
-     * expects values of Solidity type `uint` to be passed as type `BN`.
-     * We do not use BN anywhere else in the codebase.
-     */
-    bigNumberToBN(value: BigNumber) {
-        return new BN(value.toString(), 10);
-    },
-    spawnSwitchErr(name: string, value: any): Error {
-        return new Error(`Unexpected switch value: ${value} encountered for ${name}`);
-    },
-    getOrderHashHex(order: Order | SignedOrder): string {
-        const orderParts = [
-            { value: order.exchangeContractAddress, type: SolidityTypes.Address },
-            { value: order.maker, type: SolidityTypes.Address },
-            { value: order.taker, type: SolidityTypes.Address },
-            { value: order.makerTokenAddress, type: SolidityTypes.Address },
-            { value: order.takerTokenAddress, type: SolidityTypes.Address },
-            { value: order.feeRecipient, type: SolidityTypes.Address },
-            {
-                value: utils.bigNumberToBN(order.makerTokenAmount),
-                type: SolidityTypes.Uint256,
-            },
-            {
-                value: utils.bigNumberToBN(order.takerTokenAmount),
-                type: SolidityTypes.Uint256,
-            },
-            {
-                value: utils.bigNumberToBN(order.makerFee),
-                type: SolidityTypes.Uint256,
-            },
-            {
-                value: utils.bigNumberToBN(order.takerFee),
-                type: SolidityTypes.Uint256,
-            },
-            {
-                value: utils.bigNumberToBN(order.expirationUnixTimestampSec),
-                type: SolidityTypes.Uint256,
-            },
-            { value: utils.bigNumberToBN(order.salt), type: SolidityTypes.Uint256 },
-        ];
-        const types = _.map(orderParts, o => o.type);
-        const values = _.map(orderParts, o => o.value);
-        const hashBuff = ethABI.soliditySHA3(types, values);
-        const hashHex = ethUtil.bufferToHex(hashBuff);
-        return hashHex;
-    },
-    getCurrentUnixTimestampSec(): BigNumber {
-        return new BigNumber(Date.now() / 1000).round();
-    },
-    getCurrentUnixTimestampMs(): BigNumber {
-        return new BigNumber(Date.now());
-    },
-};
--- a/packages/0x.js/test/0x.js_test.ts
+++ b/packages/0x.js/test/0x.js_test.ts
@@ -1,28 +1,30 @@
-import { BlockchainLifecycle, devConstants, web3Factory } from '@0xproject/dev-utils';
+import { ContractWrappers } from '@0xproject/contract-wrappers';
+import { BlockchainLifecycle } from '@0xproject/dev-utils';
 import { BigNumber } from '@0xproject/utils';
 import * as chai from 'chai';
 import * as _ from 'lodash';
+import 'make-promises-safe';
 import 'mocha';
-import * as Sinon from 'sinon';

-import { ApprovalContractEventArgs, LogWithDecodedArgs, Order, TokenEvents, ZeroEx } from '../src';
+import { ApprovalContractEventArgs, LogWithDecodedArgs, TokenEvents, ZeroEx } from '../src';

 import { chaiSetup } from './utils/chai_setup';
 import { constants } from './utils/constants';
 import { TokenUtils } from './utils/token_utils';
-import { web3, web3Wrapper } from './utils/web3_wrapper';
+import { provider, web3Wrapper } from './utils/web3_wrapper';

 const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
 chaiSetup.configure();
 const expect = chai.expect;

-const SHOULD_ADD_PERSONAL_MESSAGE_PREFIX = false;
-
 describe('ZeroEx library', () => {
-    const config = {
-        networkId: constants.TESTRPC_NETWORK_ID,
-    };
-    const zeroEx = new ZeroEx(web3.currentProvider, config);
+    let zeroEx: ZeroEx;
+    before(async () => {
+        const config = {
+            networkId: constants.TESTRPC_NETWORK_ID,
+        };
+        zeroEx = new ZeroEx(provider, config);
+    });
    describe('#setProvider', () => {
        it('overrides provider in nested web3s and invalidates contractInstances', async () => {
            // Instantiate the contract instances with the current provider
@@ -31,18 +33,17 @@ describe('ZeroEx library', () => {
            expect((zeroEx.exchange as any)._exchangeContractIfExists).to.not.be.undefined();
            expect((zeroEx.tokenRegistry as any)._tokenRegistryContractIfExists).to.not.be.undefined();

-            const newProvider = web3Factory.getRpcProvider();
            // Add property to newProvider so that we can differentiate it from old provider
-            (newProvider as any).zeroExTestId = 1;
-            zeroEx.setProvider(newProvider, constants.TESTRPC_NETWORK_ID);
+            (provider as any).zeroExTestId = 1;
+            zeroEx.setProvider(provider, constants.TESTRPC_NETWORK_ID);

            // Check that contractInstances with old provider are removed after provider update
            expect((zeroEx.exchange as any)._exchangeContractIfExists).to.be.undefined();
            expect((zeroEx.tokenRegistry as any)._tokenRegistryContractIfExists).to.be.undefined();

-            // Check that all nested web3 wrapper instances return the updated provider
-            const nestedWeb3WrapperProvider = (zeroEx as any)._web3Wrapper.getProvider();
-            expect(nestedWeb3WrapperProvider.zeroExTestId).to.be.a('number');
+            // Check that all nested zeroExContract/web3Wrapper instances return the updated provider
+            const nestedWeb3WrapperProvider = ((zeroEx as any)._contractWrappers as ContractWrappers).getProvider();
+            expect((nestedWeb3WrapperProvider as any).zeroExTestId).to.be.a('number');
            const exchangeWeb3WrapperProvider = (zeroEx.exchange as any)._web3Wrapper.getProvider();
            expect(exchangeWeb3WrapperProvider.zeroExTestId).to.be.a('number');
            const tokenRegistryWeb3WrapperProvider = (zeroEx.tokenRegistry as any)._web3Wrapper.getProvider();
@@ -60,14 +61,12 @@ describe('ZeroEx library', () => {
        };
        const address = '0x5409ed021d9299bf6814279a6a1411a7e866a631';
        it("should return false if the data doesn't pertain to the signature & address", async () => {
-            expect(ZeroEx.isValidSignature('0x0', signature, address)).to.be.false();
            return expect(
                (zeroEx.exchange as any)._isValidSignatureUsingContractCallAsync('0x0', signature, address),
            ).to.become(false);
        });
        it("should return false if the address doesn't pertain to the signature & data", async () => {
            const validUnrelatedAddress = '0x8b0292b11a196601ed2ce54b665cafeca0347d42';
-            expect(ZeroEx.isValidSignature(dataHex, signature, validUnrelatedAddress)).to.be.false();
            return expect(
                (zeroEx.exchange as any)._isValidSignatureUsingContractCallAsync(
                    dataHex,
@@ -78,45 +77,16 @@ describe('ZeroEx library', () => {
        });
        it("should return false if the signature doesn't pertain to the dataHex & address", async () => {
            const wrongSignature = _.assign({}, signature, { v: 28 });
-            expect(ZeroEx.isValidSignature(dataHex, wrongSignature, address)).to.be.false();
            return expect(
                (zeroEx.exchange as any)._isValidSignatureUsingContractCallAsync(dataHex, wrongSignature, address),
            ).to.become(false);
        });
        it('should return true if the signature does pertain to the dataHex & address', async () => {
-            const isValidSignatureLocal = ZeroEx.isValidSignature(dataHex, signature, address);
-            expect(isValidSignatureLocal).to.be.true();
            return expect(
                (zeroEx.exchange as any)._isValidSignatureUsingContractCallAsync(dataHex, signature, address),
            ).to.become(true);
        });
    });
-    describe('#generateSalt', () => {
-        it('generates different salts', () => {
-            const equal = ZeroEx.generatePseudoRandomSalt().eq(ZeroEx.generatePseudoRandomSalt());
-            expect(equal).to.be.false();
-        });
-        it('generates salt in range [0..2^256)', () => {
-            const salt = ZeroEx.generatePseudoRandomSalt();
-            expect(salt.greaterThanOrEqualTo(0)).to.be.true();
-            const twoPow256 = new BigNumber(2).pow(256);
-            expect(salt.lessThan(twoPow256)).to.be.true();
-        });
-    });
-    describe('#isValidOrderHash', () => {
-        it('returns false if the value is not a hex string', () => {
-            const isValid = ZeroEx.isValidOrderHash('not a hex');
-            expect(isValid).to.be.false();
-        });
-        it('returns false if the length is wrong', () => {
-            const isValid = ZeroEx.isValidOrderHash('0xdeadbeef');
-            expect(isValid).to.be.false();
-        });
-        it('returns true if order hash is correct', () => {
-            const isValid = ZeroEx.isValidOrderHash('0x' + Array(65).join('0'));
-            expect(isValid).to.be.true();
-        });
-    });
    describe('#toUnitAmount', () => {
        it('should throw if invalid baseUnit amount supplied as argument', () => {
            const invalidBaseUnitAmount = new BigNumber(1000000000.4);
@@ -149,106 +119,6 @@ describe('ZeroEx library', () => {
            );
        });
    });
-    describe('#getOrderHashHex', () => {
-        const expectedOrderHash = '0x39da987067a3c9e5f1617694f1301326ba8c8b0498ebef5df4863bed394e3c83';
-        const fakeExchangeContractAddress = '0xb69e673309512a9d726f87304c6984054f87a93b';
-        const order: Order = {
-            maker: constants.NULL_ADDRESS,
-            taker: constants.NULL_ADDRESS,
-            feeRecipient: constants.NULL_ADDRESS,
-            makerTokenAddress: constants.NULL_ADDRESS,
-            takerTokenAddress: constants.NULL_ADDRESS,
-            exchangeContractAddress: fakeExchangeContractAddress,
-            salt: new BigNumber(0),
-            makerFee: new BigNumber(0),
-            takerFee: new BigNumber(0),
-            makerTokenAmount: new BigNumber(0),
-            takerTokenAmount: new BigNumber(0),
-            expirationUnixTimestampSec: new BigNumber(0),
-        };
-        it('calculates the order hash', async () => {
-            const orderHash = ZeroEx.getOrderHashHex(order);
-            expect(orderHash).to.be.equal(expectedOrderHash);
-        });
-        it('throws a readable error message if taker format is invalid', async () => {
-            const orderWithInvalidtakerFormat = {
-                ...order,
-                taker: (null as any) as string,
-            };
-            const expectedErrorMessage =
-                'Order taker must be of type string. If you want anyone to be able to fill an order - pass ZeroEx.NULL_ADDRESS';
-            expect(() => ZeroEx.getOrderHashHex(orderWithInvalidtakerFormat)).to.throw(expectedErrorMessage);
-        });
-    });
-    describe('#signOrderHashAsync', () => {
-        let stubs: Sinon.SinonStub[] = [];
-        let makerAddress: string;
-        before(async () => {
-            const availableAddreses = await zeroEx.getAvailableAddressesAsync();
-            makerAddress = availableAddreses[0];
-        });
-        afterEach(() => {
-            // clean up any stubs after the test has completed
-            _.each(stubs, s => s.restore());
-            stubs = [];
-        });
-        it('Should return the correct ECSignature', async () => {
-            const orderHash = '0x6927e990021d23b1eb7b8789f6a6feaf98fe104bb0cf8259421b79f9a34222b0';
-            const expectedECSignature = {
-                v: 27,
-                r: '0x61a3ed31b43c8780e905a260a35faefcc527be7516aa11c0256729b5b351bc33',
-                s: '0x40349190569279751135161d22529dc25add4f6069af05be04cacbda2ace2254',
-            };
-            const ecSignature = await zeroEx.signOrderHashAsync(
-                orderHash,
-                makerAddress,
-                SHOULD_ADD_PERSONAL_MESSAGE_PREFIX,
-            );
-            expect(ecSignature).to.deep.equal(expectedECSignature);
-        });
-        it('should return the correct ECSignature for signatureHex concatenated as R + S + V', async () => {
-            const orderHash = '0x34decbedc118904df65f379a175bb39ca18209d6ce41d5ed549d54e6e0a95004';
-            const signature =
-                '0x22109d11d79cb8bf96ed88625e1cd9558800c4073332a9a02857499883ee5ce3050aa3cc1f2c435e67e114cdce54b9527b4f50548342401bc5d2b77adbdacb021b';
-            const expectedECSignature = {
-                v: 27,
-                r: '0x22109d11d79cb8bf96ed88625e1cd9558800c4073332a9a02857499883ee5ce3',
-                s: '0x050aa3cc1f2c435e67e114cdce54b9527b4f50548342401bc5d2b77adbdacb02',
-            };
-            stubs = [
-                Sinon.stub((zeroEx as any)._web3Wrapper, 'signMessageAsync').returns(Promise.resolve(signature)),
-                Sinon.stub(ZeroEx, 'isValidSignature').returns(true),
-            ];
-
-            const ecSignature = await zeroEx.signOrderHashAsync(
-                orderHash,
-                makerAddress,
-                SHOULD_ADD_PERSONAL_MESSAGE_PREFIX,
-            );
-            expect(ecSignature).to.deep.equal(expectedECSignature);
-        });
-        it('should return the correct ECSignature for signatureHex concatenated as V + R + S', async () => {
-            const orderHash = '0xc793e33ffded933b76f2f48d9aa3339fc090399d5e7f5dec8d3660f5480793f7';
-            const signature =
-                '0x1bc80bedc6756722672753413efdd749b5adbd4fd552595f59c13427407ee9aee02dea66f25a608bbae457e020fb6decb763deb8b7192abab624997242da248960';
-            const expectedECSignature = {
-                v: 27,
-                r: '0xc80bedc6756722672753413efdd749b5adbd4fd552595f59c13427407ee9aee0',
-                s: '0x2dea66f25a608bbae457e020fb6decb763deb8b7192abab624997242da248960',
-            };
-            stubs = [
-                Sinon.stub((zeroEx as any)._web3Wrapper, 'signMessageAsync').returns(Promise.resolve(signature)),
-                Sinon.stub(ZeroEx, 'isValidSignature').returns(true),
-            ];
-
-            const ecSignature = await zeroEx.signOrderHashAsync(
-                orderHash,
-                makerAddress,
-                SHOULD_ADD_PERSONAL_MESSAGE_PREFIX,
-            );
-            expect(ecSignature).to.deep.equal(expectedECSignature);
-        });
-    });
    describe('#awaitTransactionMinedAsync', () => {
        beforeEach(async () => {
            await blockchainLifecycle.startAsync();
@@ -265,6 +135,7 @@ describe('ZeroEx library', () => {
            const proxyAddress = zeroEx.proxy.getContractAddress();
            const txHash = await zeroEx.token.setUnlimitedProxyAllowanceAsync(zrxTokenAddress, coinbase);
            const txReceiptWithDecodedLogs = await zeroEx.awaitTransactionMinedAsync(txHash);
+            // tslint:disable-next-line:no-unnecessary-type-assertion
            const log = txReceiptWithDecodedLogs.logs[0] as LogWithDecodedArgs<ApprovalContractEventArgs>;
            expect(log.event).to.be.equal(TokenEvents.Approval);
            expect(log.args._owner).to.be.equal(coinbase);
@@ -278,7 +149,7 @@ describe('ZeroEx library', () => {
                exchangeContractAddress: ZeroEx.NULL_ADDRESS,
                networkId: constants.TESTRPC_NETWORK_ID,
            };
-            const zeroExWithWrongExchangeAddress = new ZeroEx(web3.currentProvider, zeroExConfig);
+            const zeroExWithWrongExchangeAddress = new ZeroEx(provider, zeroExConfig);
            expect(zeroExWithWrongExchangeAddress.exchange.getContractAddress()).to.be.equal(ZeroEx.NULL_ADDRESS);
        });
        it('allows to specify token registry token contract address', async () => {
@@ -286,7 +157,7 @@ describe('ZeroEx library', () => {
                tokenRegistryContractAddress: ZeroEx.NULL_ADDRESS,
                networkId: constants.TESTRPC_NETWORK_ID,
            };
-            const zeroExWithWrongTokenRegistryAddress = new ZeroEx(web3.currentProvider, zeroExConfig);
+            const zeroExWithWrongTokenRegistryAddress = new ZeroEx(provider, zeroExConfig);
            expect(zeroExWithWrongTokenRegistryAddress.tokenRegistry.getContractAddress()).to.be.equal(
                ZeroEx.NULL_ADDRESS,
            );
--- a/packages/0x.js/test/artifacts_test.ts
+++ b/packages/0x.js/test/artifacts_test.ts
@@ -1,5 +1,5 @@
-import * as fs from 'fs';
-import HDWalletProvider = require('truffle-hdwallet-provider');
+import { web3Factory } from '@0xproject/dev-utils';
+import 'make-promises-safe';

 import { ZeroEx } from '../src';

@@ -14,14 +14,11 @@ const TIMEOUT = 10000;
 describe('Artifacts', () => {
    describe('contracts are deployed on kovan', () => {
        const kovanRpcUrl = constants.KOVAN_RPC_URL;
-        const packageJSONContent = fs.readFileSync('package.json', 'utf-8');
-        const packageJSON = JSON.parse(packageJSONContent);
-        const mnemonic = packageJSON.config.mnemonic;
-        const web3Provider = new HDWalletProvider(mnemonic, kovanRpcUrl);
+        const provider = web3Factory.getRpcProvider({ rpcUrl: kovanRpcUrl });
        const config = {
            networkId: constants.KOVAN_NETWORK_ID,
        };
-        const zeroEx = new ZeroEx(web3Provider, config);
+        const zeroEx = new ZeroEx(provider, config);
        it('token registry contract is deployed', async () => {
            await (zeroEx.tokenRegistry as any)._getTokenRegistryContractAsync();
        }).timeout(TIMEOUT);
@@ -34,14 +31,11 @@ describe('Artifacts', () => {
    });
    describe('contracts are deployed on ropsten', () => {
        const ropstenRpcUrl = constants.ROPSTEN_RPC_URL;
-        const packageJSONContent = fs.readFileSync('package.json', 'utf-8');
-        const packageJSON = JSON.parse(packageJSONContent);
-        const mnemonic = packageJSON.config.mnemonic;
-        const web3Provider = new HDWalletProvider(mnemonic, ropstenRpcUrl);
+        const provider = web3Factory.getRpcProvider({ rpcUrl: ropstenRpcUrl });
        const config = {
            networkId: constants.ROPSTEN_NETWORK_ID,
        };
-        const zeroEx = new ZeroEx(web3Provider, config);
+        const zeroEx = new ZeroEx(provider, config);
        it('token registry contract is deployed', async () => {
            await (zeroEx.tokenRegistry as any)._getTokenRegistryContractAsync();
        }).timeout(TIMEOUT);
--- a/packages/0x.js/test/assert_test.ts
+++ b/packages/0x.js/test/assert_test.ts
@@ -1,43 +0,0 @@
-import { web3Factory } from '@0xproject/dev-utils';
-import * as chai from 'chai';
-import 'mocha';
-
-import { ZeroEx } from '../src';
-import { assert } from '../src/utils/assert';
-
-import { constants } from './utils/constants';
-
-const expect = chai.expect;
-
-describe('Assertion library', () => {
-    const web3 = web3Factory.create();
-    const config = {
-        networkId: constants.TESTRPC_NETWORK_ID,
-    };
-    const zeroEx = new ZeroEx(web3.currentProvider, config);
-    describe('#isSenderAddressHexAsync', () => {
-        it('throws when address is invalid', async () => {
-            const address = '0xdeadbeef';
-            const varName = 'address';
-            return expect(
-                assert.isSenderAddressAsync(varName, address, (zeroEx as any)._web3Wrapper),
-            ).to.be.rejectedWith(`Expected ${varName} to be of type ETHAddressHex, encountered: ${address}`);
-        });
-        it('throws when address is unavailable', async () => {
-            const validUnrelatedAddress = '0x8b0292b11a196601eddce54b665cafeca0347d42';
-            const varName = 'address';
-            return expect(
-                assert.isSenderAddressAsync(varName, validUnrelatedAddress, (zeroEx as any)._web3Wrapper),
-            ).to.be.rejectedWith(
-                `Specified ${varName} ${validUnrelatedAddress} isn't available through the supplied web3 provider`,
-            );
-        });
-        it("doesn't throw if address is available", async () => {
-            const availableAddress = (await zeroEx.getAvailableAddressesAsync())[0];
-            const varName = 'address';
-            return expect(
-                assert.isSenderAddressAsync(varName, availableAddress, (zeroEx as any)._web3Wrapper),
-            ).to.become(undefined);
-        });
-    });
-});
--- a/packages/0x.js/test/global_hooks.ts
+++ b/packages/0x.js/test/global_hooks.ts
@@ -0,0 +1,17 @@
+import { devConstants } from '@0xproject/dev-utils';
+import { runV1MigrationsAsync } from '@0xproject/migrations';
+
+import { provider } from './utils/web3_wrapper';
+
+before('migrate contracts', async function(): Promise<void> {
+    // HACK: Since the migrations take longer then our global mocha timeout limit
+    // we manually increase it for this before hook.
+    const mochaTestTimeoutMs = 20000;
+    this.timeout(mochaTestTimeoutMs);
+    const txDefaults = {
+        gas: devConstants.GAS_LIMIT,
+        from: devConstants.TESTRPC_FIRST_ADDRESS,
+    };
+    const artifactsDir = `../migrations/artifacts/1.0.0`;
+    await runV1MigrationsAsync(provider, artifactsDir, txDefaults);
+});
--- a/packages/0x.js/test/remaining_fillable_calculator_test.ts
+++ b/packages/0x.js/test/remaining_fillable_calculator_test.ts
@@ -1,234 +0,0 @@
-import { ECSignature, SignedOrder } from '@0xproject/types';
-import { BigNumber } from '@0xproject/utils';
-import * as chai from 'chai';
-import 'mocha';
-
-import { ZeroEx } from '../src/0x';
-import { RemainingFillableCalculator } from '../src/order_watcher/remaining_fillable_calculator';
-
-import { chaiSetup } from './utils/chai_setup';
-
-chaiSetup.configure();
-const expect = chai.expect;
-
-describe('RemainingFillableCalculator', () => {
-    let calculator: RemainingFillableCalculator;
-    let signedOrder: SignedOrder;
-    let transferrableMakerTokenAmount: BigNumber;
-    let transferrableMakerFeeTokenAmount: BigNumber;
-    let remainingMakerTokenAmount: BigNumber;
-    let makerAmount: BigNumber;
-    let takerAmount: BigNumber;
-    let makerFeeAmount: BigNumber;
-    let isMakerTokenZRX: boolean;
-    const makerToken: string = '0x1';
-    const takerToken: string = '0x2';
-    const decimals: number = 4;
-    const zero: BigNumber = new BigNumber(0);
-    const zeroAddress = '0x0';
-    const signature: ECSignature = { v: 27, r: '', s: '' };
-    beforeEach(async () => {
-        [makerAmount, takerAmount, makerFeeAmount] = [
-            ZeroEx.toBaseUnitAmount(new BigNumber(50), decimals),
-            ZeroEx.toBaseUnitAmount(new BigNumber(5), decimals),
-            ZeroEx.toBaseUnitAmount(new BigNumber(1), decimals),
-        ];
-        [transferrableMakerTokenAmount, transferrableMakerFeeTokenAmount] = [
-            ZeroEx.toBaseUnitAmount(new BigNumber(50), decimals),
-            ZeroEx.toBaseUnitAmount(new BigNumber(5), decimals),
-        ];
-    });
-    function buildSignedOrder(): SignedOrder {
-        return {
-            ecSignature: signature,
-            exchangeContractAddress: zeroAddress,
-            feeRecipient: zeroAddress,
-            maker: zeroAddress,
-            taker: zeroAddress,
-            makerFee: makerFeeAmount,
-            takerFee: zero,
-            makerTokenAmount: makerAmount,
-            takerTokenAmount: takerAmount,
-            makerTokenAddress: makerToken,
-            takerTokenAddress: takerToken,
-            salt: zero,
-            expirationUnixTimestampSec: zero,
-        };
-    }
-    describe('Maker token is NOT ZRX', () => {
-        before(async () => {
-            isMakerTokenZRX = false;
-        });
-        it('calculates the correct amount when unfilled and funds available', () => {
-            signedOrder = buildSignedOrder();
-            remainingMakerTokenAmount = signedOrder.makerTokenAmount;
-            calculator = new RemainingFillableCalculator(
-                signedOrder,
-                isMakerTokenZRX,
-                transferrableMakerTokenAmount,
-                transferrableMakerFeeTokenAmount,
-                remainingMakerTokenAmount,
-            );
-            expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(remainingMakerTokenAmount);
-        });
-        it('calculates the correct amount when partially filled and funds available', () => {
-            signedOrder = buildSignedOrder();
-            remainingMakerTokenAmount = ZeroEx.toBaseUnitAmount(new BigNumber(1), decimals);
-            calculator = new RemainingFillableCalculator(
-                signedOrder,
-                isMakerTokenZRX,
-                transferrableMakerTokenAmount,
-                transferrableMakerFeeTokenAmount,
-                remainingMakerTokenAmount,
-            );
-            expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(remainingMakerTokenAmount);
-        });
-        it('calculates the amount to be 0 when all fee funds are transferred', () => {
-            signedOrder = buildSignedOrder();
-            transferrableMakerFeeTokenAmount = zero;
-            remainingMakerTokenAmount = signedOrder.makerTokenAmount;
-            calculator = new RemainingFillableCalculator(
-                signedOrder,
-                isMakerTokenZRX,
-                transferrableMakerTokenAmount,
-                transferrableMakerFeeTokenAmount,
-                remainingMakerTokenAmount,
-            );
-            expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(zero);
-        });
-        it('calculates the correct amount when balance is less than remaining fillable', () => {
-            signedOrder = buildSignedOrder();
-            const partiallyFilledAmount = ZeroEx.toBaseUnitAmount(new BigNumber(2), decimals);
-            remainingMakerTokenAmount = signedOrder.makerTokenAmount.minus(partiallyFilledAmount);
-            transferrableMakerTokenAmount = remainingMakerTokenAmount.minus(partiallyFilledAmount);
-            calculator = new RemainingFillableCalculator(
-                signedOrder,
-                isMakerTokenZRX,
-                transferrableMakerTokenAmount,
-                transferrableMakerFeeTokenAmount,
-                remainingMakerTokenAmount,
-            );
-            expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(transferrableMakerTokenAmount);
-        });
-        describe('Order to Fee Ratio is < 1', () => {
-            beforeEach(async () => {
-                [makerAmount, takerAmount, makerFeeAmount] = [
-                    ZeroEx.toBaseUnitAmount(new BigNumber(3), decimals),
-                    ZeroEx.toBaseUnitAmount(new BigNumber(6), decimals),
-                    ZeroEx.toBaseUnitAmount(new BigNumber(6), decimals),
-                ];
-            });
-            it('calculates the correct amount when funds unavailable', () => {
-                signedOrder = buildSignedOrder();
-                remainingMakerTokenAmount = signedOrder.makerTokenAmount;
-                const transferredAmount = ZeroEx.toBaseUnitAmount(new BigNumber(2), decimals);
-                transferrableMakerTokenAmount = remainingMakerTokenAmount.minus(transferredAmount);
-                calculator = new RemainingFillableCalculator(
-                    signedOrder,
-                    isMakerTokenZRX,
-                    transferrableMakerTokenAmount,
-                    transferrableMakerFeeTokenAmount,
-                    remainingMakerTokenAmount,
-                );
-                expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(transferrableMakerTokenAmount);
-            });
-        });
-        describe('Ratio is not evenly divisble', () => {
-            beforeEach(async () => {
-                [makerAmount, takerAmount, makerFeeAmount] = [
-                    ZeroEx.toBaseUnitAmount(new BigNumber(3), decimals),
-                    ZeroEx.toBaseUnitAmount(new BigNumber(7), decimals),
-                    ZeroEx.toBaseUnitAmount(new BigNumber(7), decimals),
-                ];
-            });
-            it('calculates the correct amount when funds unavailable', () => {
-                signedOrder = buildSignedOrder();
-                remainingMakerTokenAmount = signedOrder.makerTokenAmount;
-                const transferredAmount = ZeroEx.toBaseUnitAmount(new BigNumber(2), decimals);
-                transferrableMakerTokenAmount = remainingMakerTokenAmount.minus(transferredAmount);
-                calculator = new RemainingFillableCalculator(
-                    signedOrder,
-                    isMakerTokenZRX,
-                    transferrableMakerTokenAmount,
-                    transferrableMakerFeeTokenAmount,
-                    remainingMakerTokenAmount,
-                );
-                const calculatedFillableAmount = calculator.computeRemainingMakerFillable();
-                expect(calculatedFillableAmount.lessThanOrEqualTo(transferrableMakerTokenAmount)).to.be.true();
-                expect(calculatedFillableAmount).to.be.bignumber.greaterThan(new BigNumber(0));
-                const orderToFeeRatio = signedOrder.makerTokenAmount.dividedBy(signedOrder.makerFee);
-                const calculatedFeeAmount = calculatedFillableAmount.dividedBy(orderToFeeRatio);
-                expect(calculatedFeeAmount).to.be.bignumber.lessThan(transferrableMakerFeeTokenAmount);
-            });
-        });
-    });
-    describe('Maker Token is ZRX', () => {
-        before(async () => {
-            isMakerTokenZRX = true;
-        });
-        it('calculates the correct amount when unfilled and funds available', () => {
-            signedOrder = buildSignedOrder();
-            transferrableMakerTokenAmount = makerAmount.plus(makerFeeAmount);
-            transferrableMakerFeeTokenAmount = transferrableMakerTokenAmount;
-            remainingMakerTokenAmount = signedOrder.makerTokenAmount;
-            calculator = new RemainingFillableCalculator(
-                signedOrder,
-                isMakerTokenZRX,
-                transferrableMakerTokenAmount,
-                transferrableMakerFeeTokenAmount,
-                remainingMakerTokenAmount,
-            );
-            expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(remainingMakerTokenAmount);
-        });
-        it('calculates the correct amount when partially filled and funds available', () => {
-            signedOrder = buildSignedOrder();
-            remainingMakerTokenAmount = ZeroEx.toBaseUnitAmount(new BigNumber(1), decimals);
-            calculator = new RemainingFillableCalculator(
-                signedOrder,
-                isMakerTokenZRX,
-                transferrableMakerTokenAmount,
-                transferrableMakerFeeTokenAmount,
-                remainingMakerTokenAmount,
-            );
-            expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(remainingMakerTokenAmount);
-        });
-        it('calculates the amount to be 0 when all fee funds are transferred', () => {
-            signedOrder = buildSignedOrder();
-            transferrableMakerTokenAmount = zero;
-            transferrableMakerFeeTokenAmount = zero;
-            remainingMakerTokenAmount = signedOrder.makerTokenAmount;
-            calculator = new RemainingFillableCalculator(
-                signedOrder,
-                isMakerTokenZRX,
-                transferrableMakerTokenAmount,
-                transferrableMakerFeeTokenAmount,
-                remainingMakerTokenAmount,
-            );
-            expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(zero);
-        });
-        it('calculates the correct amount when balance is less than remaining fillable', () => {
-            signedOrder = buildSignedOrder();
-            const partiallyFilledAmount = ZeroEx.toBaseUnitAmount(new BigNumber(2), decimals);
-            remainingMakerTokenAmount = signedOrder.makerTokenAmount.minus(partiallyFilledAmount);
-            transferrableMakerTokenAmount = remainingMakerTokenAmount.minus(partiallyFilledAmount);
-            transferrableMakerFeeTokenAmount = transferrableMakerTokenAmount;
-
-            const orderToFeeRatio = signedOrder.makerTokenAmount.dividedToIntegerBy(signedOrder.makerFee);
-            const expectedFillableAmount = new BigNumber(450980);
-            calculator = new RemainingFillableCalculator(
-                signedOrder,
-                isMakerTokenZRX,
-                transferrableMakerTokenAmount,
-                transferrableMakerFeeTokenAmount,
-                remainingMakerTokenAmount,
-            );
-            const calculatedFillableAmount = calculator.computeRemainingMakerFillable();
-            const numberOfFillsInRatio = calculatedFillableAmount.dividedToIntegerBy(orderToFeeRatio);
-            const calculatedFillableAmountPlusFees = calculatedFillableAmount.plus(numberOfFillsInRatio);
-            expect(calculatedFillableAmountPlusFees).to.be.bignumber.lessThan(transferrableMakerTokenAmount);
-            expect(calculatedFillableAmountPlusFees).to.be.bignumber.lessThan(remainingMakerTokenAmount);
-            expect(calculatedFillableAmount).to.be.bignumber.equal(expectedFillableAmount);
-            expect(numberOfFillsInRatio.decimalPlaces()).to.be.equal(0);
-        });
-    });
-});
--- a/packages/0x.js/test/subscription_test.ts
+++ b/packages/0x.js/test/subscription_test.ts
@@ -1,83 +0,0 @@
-import { BlockchainLifecycle, devConstants } from '@0xproject/dev-utils';
-import { BigNumber } from '@0xproject/utils';
-import * as _ from 'lodash';
-import 'mocha';
-import * as Sinon from 'sinon';
-import * as Web3 from 'web3';
-
-import { ApprovalContractEventArgs, DecodedLogEvent, Token, TokenEvents, ZeroEx } from '../src';
-import { DoneCallback } from '../src/types';
-
-import { chaiSetup } from './utils/chai_setup';
-import { constants } from './utils/constants';
-import { assertNodeCallbackError } from './utils/report_callback_errors';
-import { web3, web3Wrapper } from './utils/web3_wrapper';
-
-chaiSetup.configure();
-const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-
-describe('SubscriptionTest', () => {
-    let zeroEx: ZeroEx;
-    let userAddresses: string[];
-    let tokens: Token[];
-    let coinbase: string;
-    let addressWithoutFunds: string;
-    const config = {
-        networkId: constants.TESTRPC_NETWORK_ID,
-    };
-    before(async () => {
-        zeroEx = new ZeroEx(web3.currentProvider, config);
-        userAddresses = await zeroEx.getAvailableAddressesAsync();
-        tokens = await zeroEx.tokenRegistry.getTokensAsync();
-        coinbase = userAddresses[0];
-        addressWithoutFunds = userAddresses[1];
-    });
-    beforeEach(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    afterEach(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    describe('#subscribe', () => {
-        const indexFilterValues = {};
-        let tokenAddress: string;
-        const allowanceAmount = new BigNumber(42);
-        let stubs: Sinon.SinonStub[] = [];
-        before(() => {
-            const token = tokens[0];
-            tokenAddress = token.address;
-        });
-        afterEach(() => {
-            zeroEx.token.unsubscribeAll();
-            _.each(stubs, s => s.restore());
-            stubs = [];
-        });
-        it('Should receive the Error when an error occurs while fetching the block', (done: DoneCallback) => {
-            (async () => {
-                const errMsg = 'Error fetching block';
-                const callback = assertNodeCallbackError(done, errMsg);
-                stubs = [Sinon.stub((zeroEx as any)._web3Wrapper, 'getBlockAsync').throws(new Error(errMsg))];
-                zeroEx.token.subscribe(tokenAddress, TokenEvents.Approval, indexFilterValues, callback);
-                await zeroEx.token.setAllowanceAsync(tokenAddress, coinbase, addressWithoutFunds, allowanceAmount);
-            })().catch(done);
-        });
-        it('Should receive the Error when an error occurs while reconciling the new block', (done: DoneCallback) => {
-            (async () => {
-                const errMsg = 'Error fetching logs';
-                const callback = assertNodeCallbackError(done, errMsg);
-                stubs = [Sinon.stub((zeroEx as any)._web3Wrapper, 'getLogsAsync').throws(new Error(errMsg))];
-                zeroEx.token.subscribe(tokenAddress, TokenEvents.Approval, indexFilterValues, callback);
-                await zeroEx.token.setAllowanceAsync(tokenAddress, coinbase, addressWithoutFunds, allowanceAmount);
-            })().catch(done);
-        });
-        it('Should allow unsubscribeAll to be called successfully after an error', (done: DoneCallback) => {
-            (async () => {
-                const callback = (err: Error | null, logEvent?: DecodedLogEvent<ApprovalContractEventArgs>) => _.noop;
-                zeroEx.token.subscribe(tokenAddress, TokenEvents.Approval, indexFilterValues, callback);
-                stubs = [Sinon.stub((zeroEx as any)._web3Wrapper, 'getBlockAsync').throws(new Error('JSON RPC error'))];
-                zeroEx.token.unsubscribeAll();
-                done();
-            })().catch(done);
-        });
-    });
-});
--- a/packages/0x.js/test/utils/chai_setup.ts
+++ b/packages/0x.js/test/utils/chai_setup.ts
@@ -4,7 +4,7 @@ import ChaiBigNumber = require('chai-bignumber');
 import * as dirtyChai from 'dirty-chai';

 export const chaiSetup = {
-    configure() {
+    configure(): void {
        chai.config.includeStack = true;
        chai.use(ChaiBigNumber());
        chai.use(dirtyChai);
--- a/packages/0x.js/test/utils/fill_scenarios.ts
+++ b/packages/0x.js/test/utils/fill_scenarios.ts
@@ -1,203 +0,0 @@
-import { BigNumber } from '@0xproject/utils';
-import { Web3Wrapper } from '@0xproject/web3-wrapper';
-
-import { SignedOrder, Token, ZeroEx } from '../../src';
-import { artifacts } from '../../src/artifacts';
-import { DummyTokenContract } from '../../src/contract_wrappers/generated/dummy_token';
-import { orderFactory } from '../utils/order_factory';
-
-import { constants } from './constants';
-
-const INITIAL_COINBASE_TOKEN_SUPPLY_IN_UNITS = new BigNumber(100);
-
-export class FillScenarios {
-    private _zeroEx: ZeroEx;
-    private _userAddresses: string[];
-    private _tokens: Token[];
-    private _coinbase: string;
-    private _zrxTokenAddress: string;
-    private _exchangeContractAddress: string;
-    constructor(
-        zeroEx: ZeroEx,
-        userAddresses: string[],
-        tokens: Token[],
-        zrxTokenAddress: string,
-        exchangeContractAddress: string,
-    ) {
-        this._zeroEx = zeroEx;
-        this._userAddresses = userAddresses;
-        this._tokens = tokens;
-        this._coinbase = userAddresses[0];
-        this._zrxTokenAddress = zrxTokenAddress;
-        this._exchangeContractAddress = exchangeContractAddress;
-    }
-    public async initTokenBalancesAsync() {
-        const web3Wrapper = (this._zeroEx as any)._web3Wrapper as Web3Wrapper;
-        for (const token of this._tokens) {
-            if (token.symbol !== 'ZRX' && token.symbol !== 'WETH') {
-                const defaults = {};
-                const dummyToken = new DummyTokenContract(
-                    artifacts.DummyTokenArtifact.abi,
-                    token.address,
-                    web3Wrapper.getProvider(),
-                    web3Wrapper.getContractDefaults(),
-                );
-                const tokenSupply = ZeroEx.toBaseUnitAmount(INITIAL_COINBASE_TOKEN_SUPPLY_IN_UNITS, token.decimals);
-                const txHash = await dummyToken.setBalance.sendTransactionAsync(this._coinbase, tokenSupply, {
-                    from: this._coinbase,
-                });
-                await this._zeroEx.awaitTransactionMinedAsync(txHash);
-            }
-        }
-    }
-    public async createFillableSignedOrderAsync(
-        makerTokenAddress: string,
-        takerTokenAddress: string,
-        makerAddress: string,
-        takerAddress: string,
-        fillableAmount: BigNumber,
-        expirationUnixTimestampSec?: BigNumber,
-    ): Promise<SignedOrder> {
-        return this.createAsymmetricFillableSignedOrderAsync(
-            makerTokenAddress,
-            takerTokenAddress,
-            makerAddress,
-            takerAddress,
-            fillableAmount,
-            fillableAmount,
-            expirationUnixTimestampSec,
-        );
-    }
-    public async createFillableSignedOrderWithFeesAsync(
-        makerTokenAddress: string,
-        takerTokenAddress: string,
-        makerFee: BigNumber,
-        takerFee: BigNumber,
-        makerAddress: string,
-        takerAddress: string,
-        fillableAmount: BigNumber,
-        feeRecepient: string,
-        expirationUnixTimestampSec?: BigNumber,
-    ): Promise<SignedOrder> {
-        return this._createAsymmetricFillableSignedOrderWithFeesAsync(
-            makerTokenAddress,
-            takerTokenAddress,
-            makerFee,
-            takerFee,
-            makerAddress,
-            takerAddress,
-            fillableAmount,
-            fillableAmount,
-            feeRecepient,
-            expirationUnixTimestampSec,
-        );
-    }
-    public async createAsymmetricFillableSignedOrderAsync(
-        makerTokenAddress: string,
-        takerTokenAddress: string,
-        makerAddress: string,
-        takerAddress: string,
-        makerFillableAmount: BigNumber,
-        takerFillableAmount: BigNumber,
-        expirationUnixTimestampSec?: BigNumber,
-    ): Promise<SignedOrder> {
-        const makerFee = new BigNumber(0);
-        const takerFee = new BigNumber(0);
-        const feeRecepient = constants.NULL_ADDRESS;
-        return this._createAsymmetricFillableSignedOrderWithFeesAsync(
-            makerTokenAddress,
-            takerTokenAddress,
-            makerFee,
-            takerFee,
-            makerAddress,
-            takerAddress,
-            makerFillableAmount,
-            takerFillableAmount,
-            feeRecepient,
-            expirationUnixTimestampSec,
-        );
-    }
-    public async createPartiallyFilledSignedOrderAsync(
-        makerTokenAddress: string,
-        takerTokenAddress: string,
-        takerAddress: string,
-        fillableAmount: BigNumber,
-        partialFillAmount: BigNumber,
-    ) {
-        const [makerAddress] = this._userAddresses;
-        const signedOrder = await this.createAsymmetricFillableSignedOrderAsync(
-            makerTokenAddress,
-            takerTokenAddress,
-            makerAddress,
-            takerAddress,
-            fillableAmount,
-            fillableAmount,
-        );
-        const shouldThrowOnInsufficientBalanceOrAllowance = false;
-        await this._zeroEx.exchange.fillOrderAsync(
-            signedOrder,
-            partialFillAmount,
-            shouldThrowOnInsufficientBalanceOrAllowance,
-            takerAddress,
-        );
-        return signedOrder;
-    }
-    private async _createAsymmetricFillableSignedOrderWithFeesAsync(
-        makerTokenAddress: string,
-        takerTokenAddress: string,
-        makerFee: BigNumber,
-        takerFee: BigNumber,
-        makerAddress: string,
-        takerAddress: string,
-        makerFillableAmount: BigNumber,
-        takerFillableAmount: BigNumber,
-        feeRecepient: string,
-        expirationUnixTimestampSec?: BigNumber,
-    ): Promise<SignedOrder> {
-        await Promise.all([
-            this._increaseBalanceAndAllowanceAsync(makerTokenAddress, makerAddress, makerFillableAmount),
-            this._increaseBalanceAndAllowanceAsync(takerTokenAddress, takerAddress, takerFillableAmount),
-        ]);
-        await Promise.all([
-            this._increaseBalanceAndAllowanceAsync(this._zrxTokenAddress, makerAddress, makerFee),
-            this._increaseBalanceAndAllowanceAsync(this._zrxTokenAddress, takerAddress, takerFee),
-        ]);
-
-        const signedOrder = await orderFactory.createSignedOrderAsync(
-            this._zeroEx,
-            makerAddress,
-            takerAddress,
-            makerFee,
-            takerFee,
-            makerFillableAmount,
-            makerTokenAddress,
-            takerFillableAmount,
-            takerTokenAddress,
-            this._exchangeContractAddress,
-            feeRecepient,
-            expirationUnixTimestampSec,
-        );
-        return signedOrder;
-    }
-    private async _increaseBalanceAndAllowanceAsync(
-        tokenAddress: string,
-        address: string,
-        amount: BigNumber,
-    ): Promise<void> {
-        if (amount.isZero() || address === ZeroEx.NULL_ADDRESS) {
-            return; // noop
-        }
-        await Promise.all([
-            this._increaseBalanceAsync(tokenAddress, address, amount),
-            this._increaseAllowanceAsync(tokenAddress, address, amount),
-        ]);
-    }
-    private async _increaseBalanceAsync(tokenAddress: string, address: string, amount: BigNumber): Promise<void> {
-        await this._zeroEx.token.transferAsync(tokenAddress, this._coinbase, address, amount);
-    }
-    private async _increaseAllowanceAsync(tokenAddress: string, address: string, amount: BigNumber): Promise<void> {
-        const oldMakerAllowance = await this._zeroEx.token.getProxyAllowanceAsync(tokenAddress, address);
-        const newMakerAllowance = oldMakerAllowance.plus(amount);
-        await this._zeroEx.token.setProxyAllowanceAsync(tokenAddress, address, newMakerAllowance);
-    }
-}
--- a/packages/0x.js/test/utils/order_factory.ts
+++ b/packages/0x.js/test/utils/order_factory.ts
@@ -1,46 +0,0 @@
-import { BigNumber } from '@0xproject/utils';
-import * as _ from 'lodash';
-
-import { SignedOrder, ZeroEx } from '../../src';
-
-const SHOULD_ADD_PERSONAL_MESSAGE_PREFIX = false;
-
-export const orderFactory = {
-    async createSignedOrderAsync(
-        zeroEx: ZeroEx,
-        maker: string,
-        taker: string,
-        makerFee: BigNumber,
-        takerFee: BigNumber,
-        makerTokenAmount: BigNumber,
-        makerTokenAddress: string,
-        takerTokenAmount: BigNumber,
-        takerTokenAddress: string,
-        exchangeContractAddress: string,
-        feeRecipient: string,
-        expirationUnixTimestampSecIfExists?: BigNumber,
-    ): Promise<SignedOrder> {
-        const defaultExpirationUnixTimestampSec = new BigNumber(2524604400); // Close to infinite
-        const expirationUnixTimestampSec = _.isUndefined(expirationUnixTimestampSecIfExists)
-            ? defaultExpirationUnixTimestampSec
-            : expirationUnixTimestampSecIfExists;
-        const order = {
-            maker,
-            taker,
-            makerFee,
-            takerFee,
-            makerTokenAmount,
-            takerTokenAmount,
-            makerTokenAddress,
-            takerTokenAddress,
-            salt: ZeroEx.generatePseudoRandomSalt(),
-            exchangeContractAddress,
-            feeRecipient,
-            expirationUnixTimestampSec,
-        };
-        const orderHash = ZeroEx.getOrderHashHex(order);
-        const ecSignature = await zeroEx.signOrderHashAsync(orderHash, maker, SHOULD_ADD_PERSONAL_MESSAGE_PREFIX);
-        const signedOrder: SignedOrder = _.assign(order, { ecSignature });
-        return signedOrder;
-    },
-};
--- a/packages/0x.js/test/utils/report_callback_errors.ts
+++ b/packages/0x.js/test/utils/report_callback_errors.ts
@@ -1,66 +0,0 @@
-import * as chai from 'chai';
-import * as _ from 'lodash';
-
-import { DoneCallback } from '../../src/types';
-
-const expect = chai.expect;
-
-export const reportNoErrorCallbackErrors = (done: DoneCallback, expectToBeCalledOnce = true) => {
-    return <T>(f?: (value: T) => void) => {
-        const wrapped = (value: T) => {
-            if (_.isUndefined(f)) {
-                done();
-                return;
-            }
-            try {
-                f(value);
-                if (expectToBeCalledOnce) {
-                    done();
-                }
-            } catch (err) {
-                done(err);
-            }
-        };
-        return wrapped;
-    };
-};
-
-export const reportNodeCallbackErrors = (done: DoneCallback, expectToBeCalledOnce = true) => {
-    return <T>(f?: (value: T) => void) => {
-        const wrapped = (error: Error | null, value: T | undefined) => {
-            if (!_.isNull(error)) {
-                done(error);
-            } else {
-                if (_.isUndefined(f)) {
-                    done();
-                    return;
-                }
-                try {
-                    f(value as T);
-                    if (expectToBeCalledOnce) {
-                        done();
-                    }
-                } catch (err) {
-                    done(err);
-                }
-            }
-        };
-        return wrapped;
-    };
-};
-
-export const assertNodeCallbackError = (done: DoneCallback, errMsg: string) => {
-    const wrapped = <T>(error: Error | null, value: T | undefined) => {
-        if (_.isNull(error)) {
-            done(new Error('Expected callback to receive an error'));
-        } else {
-            try {
-                expect(error.message).to.be.equal(errMsg);
-                done();
-            } catch (err) {
-                done(err);
-            }
-        }
-    };
-    return wrapped;
-};
--- a/packages/0x.js/test/utils/token_utils.ts
+++ b/packages/0x.js/test/utils/token_utils.ts
@@ -1,6 +1,7 @@
+import { Token } from '@0xproject/types';
 import * as _ from 'lodash';

-import { InternalZeroExError, Token } from '../../src/types';
+import { InternalZeroExError } from '../../src/types';

 const PROTOCOL_TOKEN_SYMBOL = 'ZRX';
 const WETH_TOKEN_SYMBOL = 'WETH';
--- a/packages/0x.js/test/utils/web3_wrapper.ts
+++ b/packages/0x.js/test/utils/web3_wrapper.ts
@@ -1,6 +1,8 @@
 import { web3Factory } from '@0xproject/dev-utils';
+import { Provider } from '@0xproject/types';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
-import * as Web3 from 'web3';

-export const web3 = web3Factory.create();
-export const web3Wrapper = new Web3Wrapper(web3.currentProvider);
+const provider: Provider = web3Factory.getRpcProvider({ shouldUseInProcessGanache: true });
+const web3Wrapper = new Web3Wrapper(provider);
+
+export { provider, web3Wrapper };
--- a/packages/abi-gen/CHANGELOG.json
+++ b/packages/abi-gen/CHANGELOG.json
@@ -1,4 +1,41 @@
 [
+    {
+        "version": "0.3.0",
+        "changes": [
+            {
+                "note": "Properly export the executable binary",
+                "pr": 588
+            }
+        ],
+        "timestamp": 1527008270
+    },
+    {
+        "timestamp": 1525477860,
+        "version": "0.2.13",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1525428773,
+        "version": "0.2.12",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1524044013,
+        "version": "0.2.11",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1523462196,
        "version": "0.2.10",
--- a/packages/abi-gen/CHANGELOG.md
+++ b/packages/abi-gen/CHANGELOG.md
@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v0.3.0 - _May 22, 2018_
+
+    * Properly export the executable binary (#588)
+
+## v0.2.13 - _May 4, 2018_
+
+    * Dependencies updated
+
+## v0.2.12 - _May 4, 2018_
+
+    * Dependencies updated
+
+## v0.2.11 - _April 18, 2018_
+
+    * Dependencies updated
+
 ## v0.2.10 - _April 11, 2018_

    * Dependencies updated
--- a/packages/abi-gen/README.md
+++ b/packages/abi-gen/README.md
@@ -4,8 +4,7 @@ This package allows you to generate TypeScript contract wrappers from ABI files.
 It's heavily inspired by [Geth abigen](https://github.com/ethereum/go-ethereum/wiki/Native-DApps:-Go-bindings-to-Ethereum-contracts) but takes a different approach.
 You can write your custom handlebars templates which will allow you to seamlessly integrate the generated code into your existing codebase with existing conventions.

-For an example of the generated [wrapper files](https://github.com/0xProject/0x-monorepo/tree/development/packages/0x.js/src/contract_wrappers/generated) check out 0x.js.
-[Here](https://github.com/0xProject/0x-monorepo/tree/development/packages/0x.js/contract_templates) are the templates used to generate those files.
+[Here](https://github.com/0xProject/0x-monorepo/tree/development/packages/0x.js/contract_templates) are the templates used to generate the contract wrappers used by 0x.js.e

 ## Installation

@@ -45,7 +44,7 @@ You need to also specify the location of your main template used for every contr

 ## How to write custom templates?

-The best way to get started is to copy [0x.js templates](https://github.com/0xProject/0x-monorepo/tree/development/packages/0x.js/contract_templates) and start adjusting them for your needs.
+The best way to get started is to copy [0x.js templates](https://github.com/0xProject/0x-monorepo/tree/development/packages/contract_templates) and start adjusting them for your needs.
 We use [handlebars](http://handlebarsjs.com/) template engine under the hood.
 You need to have a master template called `contract.mustache`. it will be used to generate each contract wrapper. Although - you don't need and probably shouldn't write all your logic in a single template file. You can write [partial templates](http://handlebarsjs.com/partials.html) and as long as they are within a partials folder - they will be registered and available.

@@ -80,28 +79,16 @@ yarn install

 ### Build

-If this is your **first** time building this package, you must first build **all** packages within the monorepo. This is because packages that depend on other packages located inside this monorepo are symlinked when run from **within** the monorepo. This allows you to make changes across multiple packages without first publishing dependent packages to NPM. To build all packages, run the following from the monorepo root directory:
+To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:

 ```bash
-yarn lerna:rebuild
+PKG=@0xproject/abi-gen yarn build
 ```

 Or continuously rebuild on change:

 ```bash
-yarn dev
-```
-
-You can also build this specific package by running the following from within its directory:
-
-```bash
-yarn build
-```
-
-or continuously rebuild on change:
-
-```bash
-yarn build:watch
+PKG=@0xproject/abi-gen yarn watch
 ```

 ### Clean
--- a/packages/abi-gen/bin/abi-gen.js
+++ b/packages/abi-gen/bin/abi-gen.js
@@ -0,0 +1,2 @@
+#!/usr/bin/env node
+require('../lib/index.js')
--- a/packages/abi-gen/package.json
+++ b/packages/abi-gen/package.json
@@ -1,18 +1,21 @@
 {
    "name": "@0xproject/abi-gen",
-    "version": "0.2.9",
+    "version": "0.3.0",
+    "engines": {
+        "node": ">=6.12"
+    },
    "description": "Generate contract wrappers from ABI and handlebars templates",
    "main": "lib/index.js",
    "types": "lib/index.d.ts",
    "scripts": {
-        "build:watch": "tsc -w",
-        "lint": "tslint --project . 'src/**/*.ts'",
+        "watch_without_deps": "tsc -w",
+        "lint": "tslint --project .",
        "clean": "shx rm -rf lib scripts",
        "build": "tsc && copyfiles -u 2 './lib/monorepo_scripts/**/*' ./scripts",
        "manual:postpublish": "yarn build; node ./scripts/postpublish.js"
    },
    "bin": {
-        "abi-gen": "lib/index.js"
+        "abi-gen": "bin/abi-gen.js"
    },
    "repository": {
        "type": "git",
@@ -24,9 +27,9 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/packages/abi-gen/README.md",
    "dependencies": {
-        "@0xproject/types": "^0.5.0",
-        "@0xproject/typescript-typings": "^0.0.3",
-        "@0xproject/utils": "^0.5.0",
+        "@0xproject/typescript-typings": "^0.3.2",
+        "@0xproject/utils": "^0.6.2",
+        "ethereum-types": "^0.0.1",
        "chalk": "^2.3.0",
        "glob": "^7.1.2",
        "handlebars": "^4.0.11",
@@ -36,14 +39,15 @@
        "yargs": "^10.0.3"
    },
    "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.1.16",
-        "@0xproject/tslint-config": "^0.4.14",
+        "@0xproject/monorepo-scripts": "^0.1.20",
+        "@0xproject/tslint-config": "^0.4.18",
        "@types/glob": "^5.0.33",
        "@types/handlebars": "^4.0.36",
        "@types/mkdirp": "^0.5.1",
        "@types/node": "^8.0.53",
        "@types/yargs": "^10.0.0",
        "copyfiles": "^1.2.0",
+        "make-promises-safe": "^1.1.0",
        "npm-run-all": "^4.1.2",
        "shx": "^0.2.2",
        "tslint": "5.8.0",
--- a/packages/abi-gen/src/index.ts
+++ b/packages/abi-gen/src/index.ts
@@ -1,8 +1,8 @@
 #!/usr/bin/env node

-import { AbiDefinition, ConstructorAbi, EventAbi, MethodAbi } from '@0xproject/types';
 import { abiUtils, logUtils } from '@0xproject/utils';
 import chalk from 'chalk';
+import { AbiDefinition, ConstructorAbi, EventAbi, MethodAbi } from 'ethereum-types';
 import * as fs from 'fs';
 import { sync as globSync } from 'glob';
 import * as Handlebars from 'handlebars';
@@ -12,7 +12,7 @@ import * as yargs from 'yargs';

 import toSnakeCase = require('to-snake-case');

-import { ContextData, ContractsBackend, Method, ParamKind } from './types';
+import { ContextData, ContractsBackend, ParamKind } from './types';
 import { utils } from './utils';

 const ABI_TYPE_CONSTRUCTOR = 'constructor';
@@ -61,14 +61,13 @@ const args = yargs
        'Full usage example',
    ).argv;

-function registerPartials(partialsGlob: string) {
+function registerPartials(partialsGlob: string): void {
    const partialTemplateFileNames = globSync(partialsGlob);
    logUtils.log(`Found ${chalk.green(`${partialTemplateFileNames.length}`)} ${chalk.bold('partial')} templates`);
    for (const partialTemplateFileName of partialTemplateFileNames) {
        const namedContent = utils.getNamedContent(partialTemplateFileName);
        Handlebars.registerPartial(namedContent.name, namedContent.content);
    }
-    return partialsGlob;
 }

 function writeOutputFile(name: string, renderedTsCode: string): void {
@@ -108,13 +107,13 @@ for (const abiFileName of abiFileNames) {
        ABI = parsedContent; // ABI file
    } else if (!_.isUndefined(parsedContent.abi)) {
        ABI = parsedContent.abi; // Truffle artifact
-    } else if (!_.isUndefined(parsedContent.networks) && !_.isUndefined(parsedContent.networks[args.networkId])) {
-        ABI = parsedContent.networks[args.networkId].abi; // 0x contracts package artifact
+    } else if (!_.isUndefined(parsedContent.compilerOutput.abi)) {
+        ABI = parsedContent.compilerOutput.abi; // 0x artifact
    }
    if (_.isUndefined(ABI)) {
        logUtils.log(`${chalk.red(`ABI not found in ${abiFileName}.`)}`);
        logUtils.log(
-            `Please make sure your ABI file is either an array with ABI entries or a truffle artifact or 0x deployer artifact`,
+            `Please make sure your ABI file is either an array with ABI entries or a truffle artifact or 0x sol-compiler artifact`,
        );
        process.exit(1);
    }
--- a/packages/abi-gen/src/types.ts
+++ b/packages/abi-gen/src/types.ts
@@ -1,4 +1,4 @@
-import { EventAbi, MethodAbi } from '@0xproject/types';
+import { EventAbi, MethodAbi } from 'ethereum-types';

 export enum ParamKind {
    Input = 'input',
--- a/packages/abi-gen/src/utils.ts
+++ b/packages/abi-gen/src/utils.ts
@@ -1,4 +1,4 @@
-import { AbiType, ConstructorAbi, DataItem } from '@0xproject/types';
+import { AbiType, ConstructorAbi, DataItem } from 'ethereum-types';
 import * as fs from 'fs';
 import * as _ from 'lodash';
 import * as path from 'path';
@@ -56,7 +56,7 @@ export const utils = {
                    const componentType = `${component.name}: ${componentValueType}`;
                    return componentType;
                });
-                const tsType = `{${componentsType}}`;
+                const tsType = `{${componentsType.join(';')}}`;
                return tsType;
            }
            throw new Error(`Unknown Solidity type found: ${solType}`);
--- a/packages/assert/CHANGELOG.json
+++ b/packages/assert/CHANGELOG.json
@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1527008270,
+        "version": "0.2.10",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1525477860,
+        "version": "0.2.9",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1525428773,
+        "version": "0.2.8",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1524044013,
+        "version": "0.2.7",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1523462196,
        "version": "0.2.6",
--- a/packages/assert/CHANGELOG.md
+++ b/packages/assert/CHANGELOG.md
@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v0.2.10 - _May 22, 2018_
+
+    * Dependencies updated
+
+## v0.2.9 - _May 4, 2018_
+
+    * Dependencies updated
+
+## v0.2.8 - _May 4, 2018_
+
+    * Dependencies updated
+
+## v0.2.7 - _April 18, 2018_
+
+    * Dependencies updated
+
 ## v0.2.6 - _April 11, 2018_

    * Dependencies updated
--- a/packages/assert/README.md
+++ b/packages/assert/README.md
@@ -46,28 +46,16 @@ yarn install

 ### Build

-If this is your **first** time building this package, you must first build **all** packages within the monorepo. This is because packages that depend on other packages located inside this monorepo are symlinked when run from **within** the monorepo. This allows you to make changes across multiple packages without first publishing dependent packages to NPM. To build all packages, run the following from the monorepo root directory:
+To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:

 ```bash
-yarn lerna:rebuild
+PKG=@0xproject/assert yarn build
 ```

 Or continuously rebuild on change:

 ```bash
-yarn dev
-```
-
-You can also build this specific package by running the following from within its directory:
-
-```bash
-yarn build
-```
-
-or continuously rebuild on change:
-
-```bash
-yarn build:watch
+PKG=@0xproject/assert yarn watch
 ```

 ### Clean
--- a/packages/assert/package.json
+++ b/packages/assert/package.json
@@ -1,17 +1,21 @@
 {
    "name": "@0xproject/assert",
-    "version": "0.2.5",
+    "version": "0.2.10",
+    "engines": {
+        "node": ">=6.12"
+    },
    "description": "Provides a standard way of performing type and schema validation across 0x projects",
    "main": "lib/src/index.js",
    "types": "lib/src/index.d.ts",
    "scripts": {
-        "build:watch": "tsc -w",
+        "watch_without_deps": "tsc -w",
        "build": "tsc && copyfiles -u 3 './lib/src/monorepo_scripts/**/*' ./scripts",
        "clean": "shx rm -rf lib test_temp scripts",
-        "lint": "tslint --project . 'src/**/*.ts' 'test/**/*.ts'",
-        "run_mocha": "mocha lib/test/**/*_test.js",
+        "lint": "tslint --project .",
+        "run_mocha": "mocha --require source-map-support/register lib/test/**/*_test.js --exit",
        "prepublishOnly": "run-p build",
-        "test": "run-s clean build run_mocha",
+        "test": "yarn run_mocha",
+        "rebuild_and_test": "run-s clean build test",
        "test:coverage": "nyc npm run test --all && yarn coverage:report:lcov",
        "coverage:report:lcov": "nyc report --reporter=text-lcov > coverage/lcov.info",
        "test:circleci": "yarn test:coverage",
@@ -27,14 +31,15 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/packages/assert/README.md",
    "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.1.16",
-        "@0xproject/tslint-config": "^0.4.14",
+        "@0xproject/monorepo-scripts": "^0.1.20",
+        "@0xproject/tslint-config": "^0.4.18",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^2.2.42",
        "@types/valid-url": "^1.0.2",
        "chai": "^4.0.1",
        "copyfiles": "^1.2.0",
        "dirty-chai": "^2.0.1",
+        "make-promises-safe": "^1.1.0",
        "mocha": "^4.0.1",
        "npm-run-all": "^4.1.2",
        "nyc": "^11.0.1",
@@ -43,9 +48,9 @@
        "typescript": "2.7.1"
    },
    "dependencies": {
-        "@0xproject/json-schemas": "^0.7.19",
-        "@0xproject/typescript-typings": "^0.0.3",
-        "@0xproject/utils": "^0.5.0",
+        "@0xproject/json-schemas": "0.7.22",
+        "@0xproject/typescript-typings": "^0.3.2",
+        "@0xproject/utils": "^0.6.2",
        "lodash": "^4.17.4",
        "valid-url": "^1.0.9"
    },
--- a/packages/assert/src/index.ts
+++ b/packages/assert/src/index.ts
@@ -10,7 +10,7 @@ export const assert = {
        const isBigNumber = _.isObject(value) && (value as any).isBigNumber;
        this.assert(isBigNumber, this.typeAssertionMessage(variableName, 'BigNumber', value));
    },
-    isValidBaseUnitAmount(variableName: string, value: BigNumber) {
+    isValidBaseUnitAmount(variableName: string, value: BigNumber): void {
        assert.isBigNumber(variableName, value);
        const isNegative = value.lessThan(0);
        this.assert(!isNegative, `${variableName} cannot be a negative number, found value: ${value.toNumber()}`);
@@ -64,6 +64,9 @@ export const assert = {
        this.assert(isWeb3Provider, this.typeAssertionMessage(variableName, 'Provider', value));
    },
    doesConformToSchema(variableName: string, value: any, schema: Schema, subSchemas?: Schema[]): void {
+        if (_.isUndefined(value)) {
+            throw new Error(`${variableName} can't be undefined`);
+        }
        const schemaValidator = new SchemaValidator();
        if (!_.isUndefined(subSchemas)) {
            _.map(subSchemas, schemaValidator.addSchema.bind(schemaValidator));
--- a/packages/assert/test/assert_test.ts
+++ b/packages/assert/test/assert_test.ts
@@ -2,6 +2,7 @@ import { schemas } from '@0xproject/json-schemas';
 import { BigNumber } from '@0xproject/utils';
 import * as chai from 'chai';
 import * as dirtyChai from 'dirty-chai';
+import 'make-promises-safe';
 import 'mocha';

 import { assert } from '../src/index';
@@ -10,6 +11,7 @@ chai.config.includeStack = true;
 chai.use(dirtyChai);
 const expect = chai.expect;

+// tslint:disable:custom-no-magic-numbers
 describe('Assertions', () => {
    const variableName = 'variable';
    describe('#isBigNumber', () => {
@@ -251,3 +253,4 @@ describe('Assertions', () => {
        });
    });
 });
+// tslint:enable:custom-no-magic-numbers
--- a/packages/base-contract/CHANGELOG.json
+++ b/packages/base-contract/CHANGELOG.json
@@ -1,4 +1,41 @@
 [
+    {
+        "timestamp": 1527008270,
+        "version": "0.3.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1525477860,
+        "version": "0.3.1",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "version": "0.3.0",
+        "changes": [
+            {
+                "note": "Update ethers-contracts to ethers.js",
+                "pr": 540
+            }
+        ],
+        "timestamp": 1525428773
+    },
+    {
+        "timestamp": 1524044013,
+        "version": "0.2.1",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "version": "0.2.0",
        "changes": [
--- a/packages/base-contract/CHANGELOG.md
+++ b/packages/base-contract/CHANGELOG.md
@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v0.3.2 - _May 22, 2018_
+
+    * Dependencies updated
+
+## v0.3.1 - _May 4, 2018_
+
+    * Dependencies updated
+
+## v0.3.0 - _May 4, 2018_
+
+    * Update ethers-contracts to ethers.js (#540)
+
+## v0.2.1 - _April 18, 2018_
+
+    * Dependencies updated
+
 ## v0.2.0 - _April 11, 2018_

    * Contract wrappers now accept Provider and defaults instead of Web3Wrapper (#501)
--- a/packages/base-contract/README.md
+++ b/packages/base-contract/README.md
@@ -44,14 +44,16 @@ yarn install

 ### Build

+To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:
+
 ```bash
-yarn build
+PKG=@0xproject/base-contract yarn build
 ```

-or
+Or continuously rebuild on change:

 ```bash
-yarn build:watch
+PKG=@0xproject/base-contract yarn watch
 ```

 ### Lint
--- a/packages/base-contract/package.json
+++ b/packages/base-contract/package.json
@@ -1,19 +1,23 @@
 {
    "name": "@0xproject/base-contract",
-    "version": "0.1.0",
+    "version": "0.3.2",
+    "engines": {
+        "node": ">=6.12"
+    },
    "description": "0x Base TS contract",
    "main": "lib/src/index.js",
    "types": "lib/src/index.d.ts",
    "scripts": {
-        "build:watch": "tsc -w",
+        "watch_without_deps": "tsc -w",
        "build": "tsc && copyfiles -u 2 './lib/monorepo_scripts/**/*' ./scripts",
        "clean": "shx rm -rf lib scripts",
-        "test": "run-s clean build run_mocha",
+        "test": "yarn run_mocha",
+        "rebuild_and_test": "run-s clean build test",
        "test:circleci": "yarn test:coverage",
-        "run_mocha": "mocha lib/test/**/*_test.js --bail --exit",
+        "run_mocha": "mocha --require source-map-support/register lib/test/**/*_test.js --bail --exit",
        "test:coverage": "nyc npm run test --all && yarn coverage:report:lcov",
        "coverage:report:lcov": "nyc report --reporter=text-lcov > coverage/lcov.info",
-        "lint": "tslint --project .",
+        "lint": "tslint --project . --exclude **/src/contract_wrappers/**/*",
        "manual:postpublish": "yarn build; node ./scripts/postpublish.js"
    },
    "license": "Apache-2.0",
@@ -26,11 +30,12 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/packages/base-contract/README.md",
    "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.1.16",
-        "@0xproject/tslint-config": "^0.4.14",
+        "@0xproject/monorepo-scripts": "^0.1.20",
+        "@0xproject/tslint-config": "^0.4.18",
        "@types/lodash": "4.14.104",
        "chai": "^4.0.1",
        "copyfiles": "^1.2.0",
+        "make-promises-safe": "^1.1.0",
        "mocha": "^4.0.1",
        "npm-run-all": "^4.1.2",
        "shx": "^0.2.2",
@@ -38,11 +43,11 @@
        "typescript": "2.7.1"
    },
    "dependencies": {
-        "@0xproject/types": "^0.5.0",
-        "@0xproject/typescript-typings": "^0.0.3",
-        "@0xproject/utils": "^0.5.0",
-        "@0xproject/web3-wrapper": "^0.5.0",
-        "ethers-contracts": "^2.2.1",
+        "ethereum-types": "^0.0.1",
+        "@0xproject/typescript-typings": "^0.3.2",
+        "@0xproject/utils": "^0.6.2",
+        "@0xproject/web3-wrapper": "^0.6.4",
+        "ethers": "^3.0.15",
        "lodash": "^4.17.4"
    },
    "publishConfig": {
--- a/packages/base-contract/src/index.ts
+++ b/packages/base-contract/src/index.ts
@@ -1,22 +1,23 @@
+import { abiUtils, BigNumber } from '@0xproject/utils';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import {
    AbiDefinition,
    AbiType,
+    ConstructorAbi,
    ContractAbi,
    DataItem,
    MethodAbi,
    Provider,
    TxData,
    TxDataPayable,
-} from '@0xproject/types';
-import { abiUtils, BigNumber } from '@0xproject/utils';
-import { Web3Wrapper } from '@0xproject/web3-wrapper';
-import * as ethersContracts from 'ethers-contracts';
+} from 'ethereum-types';
+import * as ethers from 'ethers';
 import * as _ from 'lodash';

 import { formatABIDataItem } from './utils';

 export interface EthersInterfaceByFunctionSignature {
-    [key: string]: ethersContracts.Interface;
+    [key: string]: ethers.Interface;
 }

 export class BaseContract {
@@ -24,6 +25,8 @@ export class BaseContract {
    protected _web3Wrapper: Web3Wrapper;
    public abi: ContractAbi;
    public address: string;
+    public contractName: string;
+    public constructorArgs: any[] = [];
    protected static _formatABIDataItemList(
        abis: DataItem[],
        values: any[],
@@ -34,14 +37,35 @@ export class BaseContract {
    protected static _lowercaseAddress(type: string, value: string): string {
        return type === 'address' ? value.toLowerCase() : value;
    }
-    protected static _bigNumberToString(type: string, value: any): any {
+    protected static _bigNumberToString(_type: string, value: any): any {
        return _.isObject(value) && value.isBigNumber ? value.toString() : value;
    }
-    protected static _bnToBigNumber(type: string, value: any): any {
+    protected static _lookupConstructorAbi(abi: ContractAbi): ConstructorAbi {
+        const constructorAbiIfExists = _.find(
+            abi,
+            (abiDefinition: AbiDefinition) => abiDefinition.type === AbiType.Constructor,
+            // tslint:disable-next-line:no-unnecessary-type-assertion
+        ) as ConstructorAbi | undefined;
+        if (!_.isUndefined(constructorAbiIfExists)) {
+            return constructorAbiIfExists;
+        } else {
+            // If the constructor is not explicitly defined, it won't be included in the ABI. It is
+            // still callable however, so we construct what the ABI would look like were it to exist.
+            const defaultConstructorAbi: ConstructorAbi = {
+                type: AbiType.Constructor,
+                stateMutability: 'nonpayable',
+                payable: false,
+                inputs: [],
+            };
+            return defaultConstructorAbi;
+        }
+    }
+    protected static _bnToBigNumber(_type: string, value: any): any {
        return _.isObject(value) && value._bn ? new BigNumber(value.toString()) : value;
    }
-    protected async _applyDefaultsToTxDataAsync<T extends Partial<TxData | TxDataPayable>>(
+    protected static async _applyDefaultsToTxDataAsync<T extends Partial<TxData | TxDataPayable>>(
        txData: T,
+        txDefaults: Partial<TxData>,
        estimateGasAsync?: (txData: T) => Promise<number>,
    ): Promise<TxData> {
        // Gas amount sourced with the following priorities:
@@ -49,20 +73,18 @@ export class BaseContract {
        // 2. Global config passed in at library instantiation
        // 3. Gas estimate calculation + safety margin
        const removeUndefinedProperties = _.pickBy;
-        const txDataWithDefaults = ({
-            to: this.address,
-            ...removeUndefinedProperties(this._web3Wrapper.getContractDefaults()),
+        const txDataWithDefaults: TxData = {
+            ...removeUndefinedProperties(txDefaults),
            ...removeUndefinedProperties(txData as any),
            // HACK: TS can't prove that T is spreadable.
            // Awaiting https://github.com/Microsoft/TypeScript/pull/13288 to be merged
-        } as any) as TxData;
+        } as any;
        if (_.isUndefined(txDataWithDefaults.gas) && !_.isUndefined(estimateGasAsync)) {
-            const estimatedGas = await estimateGasAsync(txData);
-            txDataWithDefaults.gas = estimatedGas;
+            txDataWithDefaults.gas = await estimateGasAsync(txData);
        }
        return txDataWithDefaults;
    }
-    protected _lookupEthersInterface(functionSignature: string): ethersContracts.Interface {
+    protected _lookupEthersInterface(functionSignature: string): ethers.Interface {
        const ethersInterface = this._ethersInterfacesByFunctionSignature[functionSignature];
        if (_.isUndefined(ethersInterface)) {
            throw new Error(`Failed to lookup method with function signature '${functionSignature}'`);
@@ -82,8 +104,15 @@ export class BaseContract {
        }) as MethodAbi;
        return methodAbi;
    }
-    constructor(abi: ContractAbi, address: string, provider: Provider, defaults?: Partial<TxData>) {
-        this._web3Wrapper = new Web3Wrapper(provider, defaults);
+    constructor(
+        contractName: string,
+        abi: ContractAbi,
+        address: string,
+        provider: Provider,
+        txDefaults?: Partial<TxData>,
+    ) {
+        this.contractName = contractName;
+        this._web3Wrapper = new Web3Wrapper(provider, txDefaults);
        this.abi = abi;
        this.address = address;
        const methodAbis = this.abi.filter(
@@ -92,7 +121,7 @@ export class BaseContract {
        this._ethersInterfacesByFunctionSignature = {};
        _.each(methodAbis, methodAbi => {
            const functionSignature = abiUtils.getFunctionSignature(methodAbi);
-            this._ethersInterfacesByFunctionSignature[functionSignature] = new ethersContracts.Interface([methodAbi]);
+            this._ethersInterfacesByFunctionSignature[functionSignature] = new ethers.Interface([methodAbi]);
        });
    }
 }
--- a/packages/base-contract/src/utils.ts
+++ b/packages/base-contract/src/utils.ts
@@ -1,4 +1,4 @@
-import { DataItem } from '@0xproject/types';
+import { DataItem } from 'ethereum-types';
 import * as _ from 'lodash';

 // tslint:disable-next-line:completed-docs
--- a/packages/base-contract/test/utils_test.ts
+++ b/packages/base-contract/test/utils_test.ts
@@ -1,5 +1,6 @@
 import { BigNumber } from '@0xproject/utils';
 import * as chai from 'chai';
+import 'make-promises-safe';
 import 'mocha';

 import { formatABIDataItem } from '../src/utils';
--- a/packages/connect/CHANGELOG.json
+++ b/packages/connect/CHANGELOG.json
@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1527008270,
+        "version": "0.6.13",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1525477860,
+        "version": "0.6.12",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1525428773,
+        "version": "0.6.11",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1524044013,
+        "version": "0.6.10",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1523462196,
        "version": "0.6.9",
--- a/packages/connect/CHANGELOG.md
+++ b/packages/connect/CHANGELOG.md
@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v0.6.13 - _May 22, 2018_
+
+    * Dependencies updated
+
+## v0.6.12 - _May 4, 2018_
+
+    * Dependencies updated
+
+## v0.6.11 - _May 4, 2018_
+
+    * Dependencies updated
+
+## v0.6.10 - _April 18, 2018_
+
+    * Dependencies updated
+
 ## v0.6.9 - _April 11, 2018_

    * Dependencies updated
--- a/packages/connect/README.md
+++ b/packages/connect/README.md
@@ -43,28 +43,16 @@ yarn install

 ### Build

-If this is your **first** time building this package, you must first build **all** packages within the monorepo. This is because packages that depend on other packages located inside this monorepo are symlinked when run from **within** the monorepo. This allows you to make changes across multiple packages without first publishing dependent packages to NPM. To build all packages, run the following from the monorepo root directory:
+To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:

 ```bash
-yarn lerna:rebuild
+PKG=@0xproject/connect yarn build
 ```

 Or continuously rebuild on change:

 ```bash
-yarn dev
-```
-
-You can also build this specific package by running the following from within its directory:
-
-```bash
-yarn build
-```
-
-or continuously rebuild on change:
-
-```bash
-yarn build:watch
+PKG=@0xproject/connect yarn watch
 ```

 ### Clean
--- a/packages/connect/package.json
+++ b/packages/connect/package.json
@@ -1,6 +1,9 @@
 {
    "name": "@0xproject/connect",
-    "version": "0.6.8",
+    "version": "0.6.13",
+    "engines": {
+        "node": ">=6.12"
+    },
    "description": "A javascript library for interacting with the standard relayer api",
    "keywords": [
        "connect",
@@ -12,18 +15,19 @@
    "main": "lib/src/index.js",
    "types": "lib/src/index.d.ts",
    "scripts": {
-        "build:watch": "tsc -w",
+        "watch_without_deps": "tsc -w",
        "build": "tsc && copyfiles -u 3 './lib/src/monorepo_scripts/**/*' ./scripts",
        "clean": "shx rm -rf lib test_temp scripts",
        "copy_test_fixtures": "copyfiles -u 2 './test/fixtures/**/*.json' ./lib/test/fixtures",
-        "lint": "tslint --project . 'src/**/*.ts' 'test/**/*.ts'",
-        "run_mocha": "mocha lib/test/**/*_test.js",
-        "test": "run-s clean build copy_test_fixtures run_mocha",
+        "lint": "tslint --project .",
+        "run_mocha": "mocha --require source-map-support/register lib/test/**/*_test.js --exit",
+        "test": "run-s copy_test_fixtures run_mocha",
+        "rebuild_and_test": "run-s clean build test",
        "test:coverage": "nyc npm run test --all && yarn coverage:report:lcov",
        "coverage:report:lcov": "nyc report --reporter=text-lcov > coverage/lcov.info",
        "test:circleci": "yarn test:coverage",
        "manual:postpublish": "yarn build; node ./scripts/postpublish.js",
-        "docs:stage": "yarn build && node ./scripts/stage_docs.js",
+        "docs:stage": "node scripts/stage_docs.js",
        "docs:json": "typedoc --excludePrivate --excludeExternals --target ES5 --json $JSON_FILE_PATH $PROJECT_FILES",
        "upload_docs_json": "aws s3 cp generated_docs/index.json $S3_URL --profile 0xproject --grants read=uri=http://acs.amazonaws.com/groups/global/AllUsers --content-type application/json"
    },
@@ -42,27 +46,24 @@
    },
    "author": "Brandon Millman",
    "license": "Apache-2.0",
-    "engines": {
-        "node": ">=6.0.0"
-    },
    "bugs": {
        "url": "https://github.com/0xProject/0x-monorepo/issues"
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/packages/connect/README.md",
    "dependencies": {
-        "@0xproject/assert": "^0.2.5",
-        "@0xproject/json-schemas": "^0.7.19",
-        "@0xproject/types": "^0.5.0",
-        "@0xproject/typescript-typings": "^0.0.3",
-        "@0xproject/utils": "^0.5.0",
+        "@0xproject/assert": "^0.2.10",
+        "@0xproject/json-schemas": "0.7.22",
+        "@0xproject/types": "^0.7.0",
+        "@0xproject/typescript-typings": "^0.3.2",
+        "@0xproject/utils": "^0.6.2",
        "isomorphic-fetch": "^2.2.1",
        "lodash": "^4.17.4",
        "query-string": "^5.0.1",
        "websocket": "^1.0.25"
    },
    "devDependencies": {
-        "@0xproject/monorepo-scripts": "^0.1.16",
-        "@0xproject/tslint-config": "^0.4.14",
+        "@0xproject/monorepo-scripts": "^0.1.20",
+        "@0xproject/tslint-config": "^0.4.18",
        "@types/fetch-mock": "^5.12.1",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^2.2.42",
@@ -74,6 +75,7 @@
        "copyfiles": "^1.2.0",
        "dirty-chai": "^2.0.1",
        "fetch-mock": "^5.13.1",
+        "make-promises-safe": "^1.1.0",
        "mocha": "^4.0.1",
        "npm-run-all": "^4.1.2",
        "nyc": "^11.0.1",
--- a/packages/connect/src/http_client.ts
+++ b/packages/connect/src/http_client.ts
@@ -48,7 +48,7 @@ export class HttpClient implements Client {
            return '';
        }
        // format params into a form the api expects
-        const formattedParams = _.mapKeys(params, (value: any, key: string) => {
+        const formattedParams = _.mapKeys(params, (_value: any, key: string) => {
            return _.get(OPTS_TO_QUERY_FIELD_MAP, key, key);
        });
        // stringify the formatted object
--- a/packages/connect/src/index.ts
+++ b/packages/connect/src/index.ts
@@ -17,4 +17,4 @@ export {
    WebSocketOrderbookChannelConfig,
 } from './types';

-export { ECSignature, Order, SignedOrder } from '@0xproject/types';
+export { Order, SignedOrder } from '@0xproject/types';
--- a/packages/connect/src/types.ts
+++ b/packages/connect/src/types.ts
@@ -1,4 +1,4 @@
-import { ECSignature, Order, SignedOrder } from '@0xproject/types';
+import { SignedOrder } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';

 export interface Client {
@@ -15,14 +15,14 @@ export interface OrderbookChannel {
    close: () => void;
 }

-/*
+/**
 * heartbeatInterval: Interval in milliseconds that the orderbook channel should ping the underlying websocket. Default: 15000
 */
 export interface WebSocketOrderbookChannelConfig {
    heartbeatIntervalMs?: number;
 }

-/*
+/**
 * baseTokenAddress: The address of token designated as the baseToken in the currency pair calculation of price
 * quoteTokenAddress: The address of token designated as the quoteToken in the currency pair calculation of price
 * snapshot: If true, a snapshot of the orderbook will be sent before the updates to the orderbook
--- a/packages/connect/src/utils/relayer_response_json_parsers.ts
+++ b/packages/connect/src/utils/relayer_response_json_parsers.ts
@@ -1,7 +1,6 @@
 import { assert } from '@0xproject/assert';
 import { schemas } from '@0xproject/json-schemas';
 import { SignedOrder } from '@0xproject/types';
-import * as _ from 'lodash';

 import { FeesResponse, OrderbookResponse, TokenPairsItem } from '../types';

--- a/packages/connect/src/ws_orderbook_channel.ts
+++ b/packages/connect/src/ws_orderbook_channel.ts
@@ -78,7 +78,7 @@ export class WebSocketOrderbookChannel implements OrderbookChannel {
                connection.on(WebsocketConnectionEventType.Error, wsError => {
                    handler.onError(this, subscriptionOpts, wsError);
                });
-                connection.on(WebsocketConnectionEventType.Close, (code: number, desc: string) => {
+                connection.on(WebsocketConnectionEventType.Close, (_code: number, _desc: string) => {
                    handler.onClose(this, subscriptionOpts);
                });
                connection.on(WebsocketConnectionEventType.Message, message => {
@@ -91,7 +91,7 @@ export class WebSocketOrderbookChannel implements OrderbookChannel {
    /**
     * Close the websocket and stop receiving updates
     */
-    public close() {
+    public close(): void {
        if (!_.isUndefined(this._connectionIfExists)) {
            this._connectionIfExists.close();
        }
@@ -99,7 +99,7 @@ export class WebSocketOrderbookChannel implements OrderbookChannel {
            clearInterval(this._heartbeatTimerIfExists);
        }
    }
-    private _getConnection(callback: (error?: Error, connection?: WebSocket.connection) => void) {
+    private _getConnection(callback: (error?: Error, connection?: WebSocket.connection) => void): void {
        if (!_.isUndefined(this._connectionIfExists) && this._connectionIfExists.connected) {
            callback(undefined, this._connectionIfExists);
        } else {
--- a/packages/connect/test/http_client_test.ts
+++ b/packages/connect/test/http_client_test.ts
@@ -3,6 +3,7 @@ import * as chai from 'chai';
 import * as chaiAsPromised from 'chai-as-promised';
 import * as dirtyChai from 'dirty-chai';
 import * as fetchMock from 'fetch-mock';
+import 'make-promises-safe';
 import 'mocha';

 import { HttpClient } from '../src/index';
--- a/packages/connect/test/orderbook_channel_message_parsers_test.ts
+++ b/packages/connect/test/orderbook_channel_message_parsers_test.ts
@@ -1,5 +1,6 @@
 import * as chai from 'chai';
 import * as dirtyChai from 'dirty-chai';
+import 'make-promises-safe';
 import 'mocha';

 import { orderbookChannelMessageParser } from '../src/utils/orderbook_channel_message_parser';
--- a/packages/connect/test/ws_orderbook_channel_test.ts
+++ b/packages/connect/test/ws_orderbook_channel_test.ts
@@ -1,6 +1,7 @@
 import * as chai from 'chai';
 import * as dirtyChai from 'dirty-chai';
 import * as _ from 'lodash';
+import 'make-promises-safe';
 import 'mocha';

 import { WebSocketOrderbookChannel } from '../src/ws_orderbook_channel';
--- a/packages/contract-wrappers/.npmignore
+++ b/packages/contract-wrappers/.npmignore
@@ -0,0 +1,11 @@
+.*
+tsconfig.json
+webpack.config.js
+yarn-error.log
+test/
+/src/
+/_bundles/
+/contract_templates/
+/generated_docs/
+/scripts/
+/lib/src/monorepo_scripts/
--- a/packages/contract-wrappers/CHANGELOG.json
+++ b/packages/contract-wrappers/CHANGELOG.json
@@ -0,0 +1,29 @@
+[
+    {
+        "version": "0.1.0",
+        "changes": [
+            {
+                "note": "Expose 'abi' ContractAbi property on all contract wrappers"
+            }
+        ]
+    },
+    {
+        "version": "0.0.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ],
+        "timestamp": 1527008544
+    },
+    {
+        "timestamp": 1527008270,
+        "version": "0.0.1",
+        "changes": [
+            {
+                "note": "Moved contractWrappers out of 0x.js",
+                "pr": 579
+            }
+        ]
+    }
+]
--- a/packages/contract-wrappers/CHANGELOG.md
+++ b/packages/contract-wrappers/CHANGELOG.md
@@ -0,0 +1,14 @@
+<!--
+This file is auto-generated using the monorepo-scripts package. Don't edit directly.
+Edit the package's CHANGELOG.json file only.
+-->
+
+CHANGELOG
+
+## v0.0.2 - _May 22, 2018_
+
+    * Dependencies updated
+
+## v0.0.1 - _May 22, 2018_
+
+    * Moved contractWrappers out of 0x.js (#579)
--- a/packages/contract-wrappers/README.md
+++ b/packages/contract-wrappers/README.md
@@ -0,0 +1,89 @@
+## @0xproject/contract-wrappers
+
+Smart TS wrappers for 0x smart contracts. The wrappers have simplified interfaces, perform client-side validation on transactions and throw helpful error messages.
+
+### Read the [Documentation](https://0xproject.com/docs/0x.js).
+
+## Installation
+
+**Install**
+
+```bash
+npm install @0xproject/contract-wrappers --save
+```
+
+**Import**
+
+```javascript
+import { ContractWrappers } from '@0xproject/contract-wrappers';
+```
+
+If your project is in [TypeScript](https://www.typescriptlang.org/), add the following to your `tsconfig.json`:
+
+```json
+"compilerOptions": {
+    "typeRoots": ["node_modules/@0xproject/typescript-typings/types", "node_modules/@types"],
+}
+```
+
+## Contributing
+
+We strongly recommend that the community help us make improvements and determine the future direction of the protocol. To report bugs within this package, please create an issue in this repository.
+
+Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.
+
+### Install dependencies
+
+If you don't have yarn workspaces enabled (Yarn < v1.0) - enable them:
+
+```bash
+yarn config set workspaces-experimental true
+```
+
+Then install dependencies
+
+```bash
+yarn install
+```
+
+### Build
+
+To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:
+
+```bash
+PKG=@0xproject/contract-wrappers yarn build
+```
+
+Or continuously rebuild on change:
+
+```bash
+PKG=@0xproject/contract-wrappers yarn watch
+```
+
+```bash
+yarn build
+```
+
+or continuously rebuild on change:
+
+```bash
+yarn watch
+```
+
+### Clean
+
+```bash
+yarn clean
+```
+
+### Lint
+
+```bash
+yarn lint
+```
+
+### Run Tests
+
+```bash
+yarn test
+```
--- a/packages/contract-wrappers/coverage/.gitkeep
+++ b/packages/contract-wrappers/coverage/.gitkeep
--- a/packages/contract-wrappers/package.json
+++ b/packages/contract-wrappers/package.json
@@ -0,0 +1,100 @@
+{
+    "name": "@0xproject/contract-wrappers",
+    "version": "0.0.2",
+    "description": "Smart TS wrappers for 0x smart contracts",
+    "keywords": [
+        "0xproject",
+        "ethereum",
+        "tokens",
+        "exchange"
+    ],
+    "main": "lib/src/index.js",
+    "types": "lib/src/index.d.ts",
+    "scripts": {
+        "watch_without_deps": "yarn pre_build && tsc -w",
+        "build": "yarn pre_build && tsc && copyfiles -u 3 './lib/src/monorepo_scripts/**/*' ./scripts",
+        "pre_build": "run-s generate_contract_wrappers update_test_artifacts update_compact_artifacts",
+        "generate_contract_wrappers": "abi-gen --abis 'src/compact_artifacts/@(Exchange|Token|TokenTransferProxy|EtherToken|TokenRegistry|DummyToken).json' --template ../contract_templates/contract.handlebars --partials '../contract_templates/partials/**/*.handlebars' --output src/contract_wrappers/generated --backend ethers && prettier --write 'src/contract_wrappers/generated/**.ts'",
+        "lint": "tslint --project . --exclude **/src/contract_wrappers/**/* --exclude **/lib/**/*",
+        "test:circleci": "run-s test:coverage",
+        "test": "yarn run_mocha",
+        "rebuild_and_test": "run-s build test",
+        "test:coverage": "nyc npm run test --all && yarn coverage:report:lcov",
+        "coverage:report:lcov": "nyc report --reporter=text-lcov > coverage/lcov.info",
+        "update_compact_artifacts": "copyfiles -u 2 './src/compact_artifacts/**/*.json' ./lib/src/compact_artifacts",
+        "update_test_artifacts": "for i in ${npm_package_config_contracts}; do copyfiles -u 4 ../migrations/artifacts/1.0.0/$i.json test/artifacts; done;",
+        "clean": "shx rm -rf _bundles lib test_temp scripts test/artifacts src/contract_wrappers/generated",
+        "run_mocha": "mocha --require source-map-support/register lib/test/**/*_test.js lib/test/global_hooks.js --timeout 10000 --bail --exit",
+        "manual:postpublish": "yarn build; node ./scripts/postpublish.js"
+    },
+    "config": {
+        "compact_artifacts": "Exchange DummyToken ZRXToken Token EtherToken TokenTransferProxy TokenRegistry",
+        "contracts": "Exchange DummyToken ZRXToken Token WETH9 TokenTransferProxy_v1 MultiSigWallet MultiSigWalletWithTimeLock MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress MaliciousToken TokenRegistry Arbitrage EtherDelta AccountLevels",
+        "postpublish": {
+            "assets": [
+                "packages/contract-wrappers/_bundles/index.js",
+                "packages/contract-wrappers/_bundles/index.min.js"
+            ]
+        }
+    },
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/0xProject/0x-monorepo"
+    },
+    "license": "Apache-2.0",
+    "engines": {
+        "node": ">=6.0.0"
+    },
+    "devDependencies": {
+        "@0xproject/abi-gen": "^0.3.0",
+        "@0xproject/dev-utils": "^0.4.2",
+        "@0xproject/migrations": "^0.0.6",
+        "@0xproject/monorepo-scripts": "^0.1.20",
+        "@0xproject/sol-compiler": "^0.5.0",
+        "@0xproject/subproviders": "^0.10.2",
+        "@0xproject/tslint-config": "^0.4.18",
+        "@types/lodash": "4.14.104",
+        "@types/mocha": "^2.2.42",
+        "@types/node": "^8.0.53",
+        "@types/sinon": "^2.2.2",
+        "@types/uuid": "^3.4.2",
+        "awesome-typescript-loader": "^3.1.3",
+        "chai": "^4.0.1",
+        "chai-as-promised": "^7.1.0",
+        "chai-bignumber": "^2.0.1",
+        "copyfiles": "^1.2.0",
+        "dirty-chai": "^2.0.1",
+        "make-promises-safe": "^1.1.0",
+        "mocha": "^4.0.1",
+        "npm-run-all": "^4.1.2",
+        "nyc": "^11.0.1",
+        "opn-cli": "^3.1.0",
+        "shx": "^0.2.2",
+        "sinon": "^4.0.0",
+        "source-map-support": "^0.5.0",
+        "tslint": "5.8.0",
+        "typescript": "2.7.1",
+        "web3-provider-engine": "^14.0.4"
+    },
+    "dependencies": {
+        "@0xproject/assert": "^0.2.10",
+        "@0xproject/base-contract": "^0.3.2",
+        "@0xproject/fill-scenarios": "^0.0.2",
+        "@0xproject/json-schemas": "0.7.22",
+        "@0xproject/order-utils": "0.0.5",
+        "@0xproject/types": "0.7.0",
+        "@0xproject/typescript-typings": "^0.3.2",
+        "@0xproject/utils": "^0.6.2",
+        "@0xproject/web3-wrapper": "^0.6.4",
+        "ethereum-types": "^0.0.1",
+        "ethereumjs-blockstream": "^2.0.6",
+        "ethereumjs-util": "^5.1.1",
+        "ethers": "^3.0.15",
+        "js-sha3": "^0.7.0",
+        "lodash": "^4.17.4",
+        "uuid": "^3.1.0"
+    },
+    "publishConfig": {
+        "access": "public"
+    }
+}
--- a/packages/contract-wrappers/src/abstract/abstract_balance_and_proxy_allowance_lazy_store.ts
+++ b/packages/contract-wrappers/src/abstract/abstract_balance_and_proxy_allowance_lazy_store.ts
@@ -0,0 +1,11 @@
+import { BigNumber } from '@0xproject/utils';
+
+export abstract class AbstractBalanceAndProxyAllowanceLazyStore {
+    public abstract async getBalanceAsync(tokenAddress: string, userAddress: string): Promise<BigNumber>;
+    public abstract async getProxyAllowanceAsync(tokenAddress: string, userAddress: string): Promise<BigNumber>;
+    public abstract setBalance(tokenAddress: string, userAddress: string, balance: BigNumber): void;
+    public abstract deleteBalance(tokenAddress: string, userAddress: string): void;
+    public abstract setProxyAllowance(tokenAddress: string, userAddress: string, proxyAllowance: BigNumber): void;
+    public abstract deleteProxyAllowance(tokenAddress: string, userAddress: string): void;
+    public abstract deleteAll(): void;
+}
--- a/packages/contract-wrappers/src/artifacts.ts
+++ b/packages/contract-wrappers/src/artifacts.ts
@@ -0,0 +1,18 @@
+import { Artifact } from '@0xproject/types';
+
+import * as DummyToken from './compact_artifacts/DummyToken.json';
+import * as EtherToken from './compact_artifacts/EtherToken.json';
+import * as Exchange from './compact_artifacts/Exchange.json';
+import * as Token from './compact_artifacts/Token.json';
+import * as TokenRegistry from './compact_artifacts/TokenRegistry.json';
+import * as TokenTransferProxy from './compact_artifacts/TokenTransferProxy.json';
+import * as ZRX from './compact_artifacts/ZRX.json';
+export const artifacts = {
+    ZRX: (ZRX as any) as Artifact,
+    DummyToken: (DummyToken as any) as Artifact,
+    Token: (Token as any) as Artifact,
+    Exchange: (Exchange as any) as Artifact,
+    EtherToken: (EtherToken as any) as Artifact,
+    TokenRegistry: (TokenRegistry as any) as Artifact,
+    TokenTransferProxy: (TokenTransferProxy as any) as Artifact,
+};
--- a/packages/contract-wrappers/src/compact_artifacts/DummyToken.json
+++ b/packages/contract-wrappers/src/compact_artifacts/DummyToken.json
@@ -0,0 +1,22 @@
+{
+    "contract_name": "DummyToken",
+    "abi": [
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "_target",
+                    "type": "address"
+                },
+                {
+                    "name": "_value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "setBalance",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        }
+    ]
+}
--- a/packages/contract-wrappers/src/compact_artifacts/EtherToken.json
+++ b/packages/contract-wrappers/src/compact_artifacts/EtherToken.json
@@ -0,0 +1,287 @@
+{
+    "contract_name": "EtherToken",
+    "abi": [
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "name",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "string"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "_spender",
+                    "type": "address"
+                },
+                {
+                    "name": "_value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "approve",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "bool"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "totalSupply",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "_from",
+                    "type": "address"
+                },
+                {
+                    "name": "_to",
+                    "type": "address"
+                },
+                {
+                    "name": "_value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "transferFrom",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "bool"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "amount",
+                    "type": "uint256"
+                }
+            ],
+            "name": "withdraw",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "decimals",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint8"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "_owner",
+                    "type": "address"
+                }
+            ],
+            "name": "balanceOf",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "symbol",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "string"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "_to",
+                    "type": "address"
+                },
+                {
+                    "name": "_value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "transfer",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "bool"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [],
+            "name": "deposit",
+            "outputs": [],
+            "payable": true,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "_owner",
+                    "type": "address"
+                },
+                {
+                    "name": "_spender",
+                    "type": "address"
+                }
+            ],
+            "name": "allowance",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "payable": true,
+            "type": "fallback"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "_from",
+                    "type": "address"
+                },
+                {
+                    "indexed": true,
+                    "name": "_to",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "_value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "Transfer",
+            "type": "event"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "_owner",
+                    "type": "address"
+                },
+                {
+                    "indexed": true,
+                    "name": "_spender",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "_value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "Approval",
+            "type": "event"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "_owner",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "_value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "Deposit",
+            "type": "event"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "_owner",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "_value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "Withdrawal",
+            "type": "event"
+        }
+    ],
+    "networks": {
+        "1": {
+            "address": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2"
+        },
+        "3": {
+            "address": "0xc00fd9820cd2898cc4c054b7bf142de637ad129a"
+        },
+        "4": {
+            "address": "0xc778417e063141139fce010982780140aa0cd5ab"
+        },
+        "42": {
+            "address": "0x653e49e301e508a13237c0ddc98ae7d4cd2667a1"
+        },
+        "50": {
+            "address": "0x871dd7c2b4b25e1aa18728e9d5f2af4c4e431f5c"
+        }
+    }
+}
--- a/packages/contract-wrappers/src/compact_artifacts/Exchange.json
+++ b/packages/contract-wrappers/src/compact_artifacts/Exchange.json
@@ -0,0 +1,610 @@
+{
+    "contract_name": "Exchange",
+    "abi": [
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "numerator",
+                    "type": "uint256"
+                },
+                {
+                    "name": "denominator",
+                    "type": "uint256"
+                },
+                {
+                    "name": "target",
+                    "type": "uint256"
+                }
+            ],
+            "name": "isRoundingError",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "bool"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "filled",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "cancelled",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5][]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6][]"
+                },
+                {
+                    "name": "fillTakerTokenAmount",
+                    "type": "uint256"
+                },
+                {
+                    "name": "shouldThrowOnInsufficientBalanceOrAllowance",
+                    "type": "bool"
+                },
+                {
+                    "name": "v",
+                    "type": "uint8[]"
+                },
+                {
+                    "name": "r",
+                    "type": "bytes32[]"
+                },
+                {
+                    "name": "s",
+                    "type": "bytes32[]"
+                }
+            ],
+            "name": "fillOrdersUpTo",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6]"
+                },
+                {
+                    "name": "cancelTakerTokenAmount",
+                    "type": "uint256"
+                }
+            ],
+            "name": "cancelOrder",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "ZRX_TOKEN_CONTRACT",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5][]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6][]"
+                },
+                {
+                    "name": "fillTakerTokenAmounts",
+                    "type": "uint256[]"
+                },
+                {
+                    "name": "v",
+                    "type": "uint8[]"
+                },
+                {
+                    "name": "r",
+                    "type": "bytes32[]"
+                },
+                {
+                    "name": "s",
+                    "type": "bytes32[]"
+                }
+            ],
+            "name": "batchFillOrKillOrders",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6]"
+                },
+                {
+                    "name": "fillTakerTokenAmount",
+                    "type": "uint256"
+                },
+                {
+                    "name": "v",
+                    "type": "uint8"
+                },
+                {
+                    "name": "r",
+                    "type": "bytes32"
+                },
+                {
+                    "name": "s",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "fillOrKillOrder",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "orderHash",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "getUnavailableTakerTokenAmount",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "signer",
+                    "type": "address"
+                },
+                {
+                    "name": "hash",
+                    "type": "bytes32"
+                },
+                {
+                    "name": "v",
+                    "type": "uint8"
+                },
+                {
+                    "name": "r",
+                    "type": "bytes32"
+                },
+                {
+                    "name": "s",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "isValidSignature",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "bool"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "numerator",
+                    "type": "uint256"
+                },
+                {
+                    "name": "denominator",
+                    "type": "uint256"
+                },
+                {
+                    "name": "target",
+                    "type": "uint256"
+                }
+            ],
+            "name": "getPartialAmount",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "TOKEN_TRANSFER_PROXY_CONTRACT",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5][]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6][]"
+                },
+                {
+                    "name": "fillTakerTokenAmounts",
+                    "type": "uint256[]"
+                },
+                {
+                    "name": "shouldThrowOnInsufficientBalanceOrAllowance",
+                    "type": "bool"
+                },
+                {
+                    "name": "v",
+                    "type": "uint8[]"
+                },
+                {
+                    "name": "r",
+                    "type": "bytes32[]"
+                },
+                {
+                    "name": "s",
+                    "type": "bytes32[]"
+                }
+            ],
+            "name": "batchFillOrders",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5][]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6][]"
+                },
+                {
+                    "name": "cancelTakerTokenAmounts",
+                    "type": "uint256[]"
+                }
+            ],
+            "name": "batchCancelOrders",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6]"
+                },
+                {
+                    "name": "fillTakerTokenAmount",
+                    "type": "uint256"
+                },
+                {
+                    "name": "shouldThrowOnInsufficientBalanceOrAllowance",
+                    "type": "bool"
+                },
+                {
+                    "name": "v",
+                    "type": "uint8"
+                },
+                {
+                    "name": "r",
+                    "type": "bytes32"
+                },
+                {
+                    "name": "s",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "fillOrder",
+            "outputs": [
+                {
+                    "name": "filledTakerTokenAmount",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "orderAddresses",
+                    "type": "address[5]"
+                },
+                {
+                    "name": "orderValues",
+                    "type": "uint256[6]"
+                }
+            ],
+            "name": "getOrderHash",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "bytes32"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "EXTERNAL_QUERY_GAS_LIMIT",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "uint16"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "VERSION",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "string"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "inputs": [
+                {
+                    "name": "_zrxToken",
+                    "type": "address"
+                },
+                {
+                    "name": "_tokenTransferProxy",
+                    "type": "address"
+                }
+            ],
+            "payable": false,
+            "type": "constructor"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "maker",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "taker",
+                    "type": "address"
+                },
+                {
+                    "indexed": true,
+                    "name": "feeRecipient",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "makerToken",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "takerToken",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "filledMakerTokenAmount",
+                    "type": "uint256"
+                },
+                {
+                    "indexed": false,
+                    "name": "filledTakerTokenAmount",
+                    "type": "uint256"
+                },
+                {
+                    "indexed": false,
+                    "name": "paidMakerFee",
+                    "type": "uint256"
+                },
+                {
+                    "indexed": false,
+                    "name": "paidTakerFee",
+                    "type": "uint256"
+                },
+                {
+                    "indexed": true,
+                    "name": "tokens",
+                    "type": "bytes32"
+                },
+                {
+                    "indexed": false,
+                    "name": "orderHash",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "LogFill",
+            "type": "event"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "maker",
+                    "type": "address"
+                },
+                {
+                    "indexed": true,
+                    "name": "feeRecipient",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "makerToken",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "takerToken",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "cancelledMakerTokenAmount",
+                    "type": "uint256"
+                },
+                {
+                    "indexed": false,
+                    "name": "cancelledTakerTokenAmount",
+                    "type": "uint256"
+                },
+                {
+                    "indexed": true,
+                    "name": "tokens",
+                    "type": "bytes32"
+                },
+                {
+                    "indexed": false,
+                    "name": "orderHash",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "LogCancel",
+            "type": "event"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "errorId",
+                    "type": "uint8"
+                },
+                {
+                    "indexed": true,
+                    "name": "orderHash",
+                    "type": "bytes32"
+                }
+            ],
+            "name": "LogError",
+            "type": "event"
+        }
+    ],
+    "networks": {
+        "1": {
+            "address": "0x12459c951127e0c374ff9105dda097662a027093"
+        },
+        "3": {
+            "address": "0x479cc461fecd078f766ecc58533d6f69580cf3ac"
+        },
+        "4": {
+            "address": "0x1d16ef40fac01cec8adac2ac49427b9384192c05"
+        },
+        "42": {
+            "address": "0x90fe2af704b34e0224bf2299c838e04d4dcf1364"
+        },
+        "50": {
+            "address": "0x48bacb9266a570d521063ef5dd96e61686dbe788"
+        }
+    }
+}
--- a/packages/contract-wrappers/src/compact_artifacts/Token.json
+++ b/packages/contract-wrappers/src/compact_artifacts/Token.json
@@ -0,0 +1,172 @@
+{
+    "contract_name": "Token",
+    "abi": [
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "_spender",
+                    "type": "address"
+                },
+                {
+                    "name": "_value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "approve",
+            "outputs": [
+                {
+                    "name": "success",
+                    "type": "bool"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "totalSupply",
+            "outputs": [
+                {
+                    "name": "supply",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "_from",
+                    "type": "address"
+                },
+                {
+                    "name": "_to",
+                    "type": "address"
+                },
+                {
+                    "name": "_value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "transferFrom",
+            "outputs": [
+                {
+                    "name": "success",
+                    "type": "bool"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "_owner",
+                    "type": "address"
+                }
+            ],
+            "name": "balanceOf",
+            "outputs": [
+                {
+                    "name": "balance",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "_to",
+                    "type": "address"
+                },
+                {
+                    "name": "_value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "transfer",
+            "outputs": [
+                {
+                    "name": "success",
+                    "type": "bool"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "_owner",
+                    "type": "address"
+                },
+                {
+                    "name": "_spender",
+                    "type": "address"
+                }
+            ],
+            "name": "allowance",
+            "outputs": [
+                {
+                    "name": "remaining",
+                    "type": "uint256"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "_from",
+                    "type": "address"
+                },
+                {
+                    "indexed": true,
+                    "name": "_to",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "_value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "Transfer",
+            "type": "event"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "_owner",
+                    "type": "address"
+                },
+                {
+                    "indexed": true,
+                    "name": "_spender",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "_value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "Approval",
+            "type": "event"
+        }
+    ]
+}
--- a/packages/contract-wrappers/src/compact_artifacts/TokenRegistry.json
+++ b/packages/contract-wrappers/src/compact_artifacts/TokenRegistry.json
@@ -0,0 +1,547 @@
+{
+    "contract_name": "TokenRegistry",
+    "abi": [
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "_token",
+                    "type": "address"
+                },
+                {
+                    "name": "_index",
+                    "type": "uint256"
+                }
+            ],
+            "name": "removeToken",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "_name",
+                    "type": "string"
+                }
+            ],
+            "name": "getTokenAddressByName",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "_symbol",
+                    "type": "string"
+                }
+            ],
+            "name": "getTokenAddressBySymbol",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "_token",
+                    "type": "address"
+                },
+                {
+                    "name": "_swarmHash",
+                    "type": "bytes"
+                }
+            ],
+            "name": "setTokenSwarmHash",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "_token",
+                    "type": "address"
+                }
+            ],
+            "name": "getTokenMetaData",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                },
+                {
+                    "name": "",
+                    "type": "string"
+                },
+                {
+                    "name": "",
+                    "type": "string"
+                },
+                {
+                    "name": "",
+                    "type": "uint8"
+                },
+                {
+                    "name": "",
+                    "type": "bytes"
+                },
+                {
+                    "name": "",
+                    "type": "bytes"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "owner",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "_token",
+                    "type": "address"
+                },
+                {
+                    "name": "_name",
+                    "type": "string"
+                },
+                {
+                    "name": "_symbol",
+                    "type": "string"
+                },
+                {
+                    "name": "_decimals",
+                    "type": "uint8"
+                },
+                {
+                    "name": "_ipfsHash",
+                    "type": "bytes"
+                },
+                {
+                    "name": "_swarmHash",
+                    "type": "bytes"
+                }
+            ],
+            "name": "addToken",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "_token",
+                    "type": "address"
+                },
+                {
+                    "name": "_name",
+                    "type": "string"
+                }
+            ],
+            "name": "setTokenName",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                }
+            ],
+            "name": "tokens",
+            "outputs": [
+                {
+                    "name": "token",
+                    "type": "address"
+                },
+                {
+                    "name": "name",
+                    "type": "string"
+                },
+                {
+                    "name": "symbol",
+                    "type": "string"
+                },
+                {
+                    "name": "decimals",
+                    "type": "uint8"
+                },
+                {
+                    "name": "ipfsHash",
+                    "type": "bytes"
+                },
+                {
+                    "name": "swarmHash",
+                    "type": "bytes"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "name": "tokenAddresses",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "_name",
+                    "type": "string"
+                }
+            ],
+            "name": "getTokenByName",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                },
+                {
+                    "name": "",
+                    "type": "string"
+                },
+                {
+                    "name": "",
+                    "type": "string"
+                },
+                {
+                    "name": "",
+                    "type": "uint8"
+                },
+                {
+                    "name": "",
+                    "type": "bytes"
+                },
+                {
+                    "name": "",
+                    "type": "bytes"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "getTokenAddresses",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address[]"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "_token",
+                    "type": "address"
+                },
+                {
+                    "name": "_ipfsHash",
+                    "type": "bytes"
+                }
+            ],
+            "name": "setTokenIpfsHash",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "_symbol",
+                    "type": "string"
+                }
+            ],
+            "name": "getTokenBySymbol",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                },
+                {
+                    "name": "",
+                    "type": "string"
+                },
+                {
+                    "name": "",
+                    "type": "string"
+                },
+                {
+                    "name": "",
+                    "type": "uint8"
+                },
+                {
+                    "name": "",
+                    "type": "bytes"
+                },
+                {
+                    "name": "",
+                    "type": "bytes"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "_token",
+                    "type": "address"
+                },
+                {
+                    "name": "_symbol",
+                    "type": "string"
+                }
+            ],
+            "name": "setTokenSymbol",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "newOwner",
+                    "type": "address"
+                }
+            ],
+            "name": "transferOwnership",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "token",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "name",
+                    "type": "string"
+                },
+                {
+                    "indexed": false,
+                    "name": "symbol",
+                    "type": "string"
+                },
+                {
+                    "indexed": false,
+                    "name": "decimals",
+                    "type": "uint8"
+                },
+                {
+                    "indexed": false,
+                    "name": "ipfsHash",
+                    "type": "bytes"
+                },
+                {
+                    "indexed": false,
+                    "name": "swarmHash",
+                    "type": "bytes"
+                }
+            ],
+            "name": "LogAddToken",
+            "type": "event"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "token",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "name",
+                    "type": "string"
+                },
+                {
+                    "indexed": false,
+                    "name": "symbol",
+                    "type": "string"
+                },
+                {
+                    "indexed": false,
+                    "name": "decimals",
+                    "type": "uint8"
+                },
+                {
+                    "indexed": false,
+                    "name": "ipfsHash",
+                    "type": "bytes"
+                },
+                {
+                    "indexed": false,
+                    "name": "swarmHash",
+                    "type": "bytes"
+                }
+            ],
+            "name": "LogRemoveToken",
+            "type": "event"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "token",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "oldName",
+                    "type": "string"
+                },
+                {
+                    "indexed": false,
+                    "name": "newName",
+                    "type": "string"
+                }
+            ],
+            "name": "LogTokenNameChange",
+            "type": "event"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "token",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "oldSymbol",
+                    "type": "string"
+                },
+                {
+                    "indexed": false,
+                    "name": "newSymbol",
+                    "type": "string"
+                }
+            ],
+            "name": "LogTokenSymbolChange",
+            "type": "event"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "token",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "oldIpfsHash",
+                    "type": "bytes"
+                },
+                {
+                    "indexed": false,
+                    "name": "newIpfsHash",
+                    "type": "bytes"
+                }
+            ],
+            "name": "LogTokenIpfsHashChange",
+            "type": "event"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "token",
+                    "type": "address"
+                },
+                {
+                    "indexed": false,
+                    "name": "oldSwarmHash",
+                    "type": "bytes"
+                },
+                {
+                    "indexed": false,
+                    "name": "newSwarmHash",
+                    "type": "bytes"
+                }
+            ],
+            "name": "LogTokenSwarmHashChange",
+            "type": "event"
+        }
+    ],
+    "networks": {
+        "1": {
+            "address": "0x926a74c5c36adf004c87399e65f75628b0f98d2c"
+        },
+        "3": {
+            "address": "0x6b1a50f0bb5a7995444bd3877b22dc89c62843ed"
+        },
+        "4": {
+            "address": "0x4e9aad8184de8833365fea970cd9149372fdf1e6"
+        },
+        "42": {
+            "address": "0xf18e504561f4347bea557f3d4558f559dddbae7f"
+        },
+        "50": {
+            "address": "0x0b1ba0af832d7c05fd64161e0db78e85978e8082"
+        }
+    }
+}
--- a/packages/contract-wrappers/src/compact_artifacts/TokenTransferProxy.json
+++ b/packages/contract-wrappers/src/compact_artifacts/TokenTransferProxy.json
@@ -0,0 +1,187 @@
+{
+    "contract_name": "TokenTransferProxy",
+    "abi": [
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "token",
+                    "type": "address"
+                },
+                {
+                    "name": "from",
+                    "type": "address"
+                },
+                {
+                    "name": "to",
+                    "type": "address"
+                },
+                {
+                    "name": "value",
+                    "type": "uint256"
+                }
+            ],
+            "name": "transferFrom",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "bool"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "target",
+                    "type": "address"
+                }
+            ],
+            "name": "addAuthorizedAddress",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "",
+                    "type": "uint256"
+                }
+            ],
+            "name": "authorities",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "target",
+                    "type": "address"
+                }
+            ],
+            "name": "removeAuthorizedAddress",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "owner",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [
+                {
+                    "name": "",
+                    "type": "address"
+                }
+            ],
+            "name": "authorized",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "bool"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": true,
+            "inputs": [],
+            "name": "getAuthorizedAddresses",
+            "outputs": [
+                {
+                    "name": "",
+                    "type": "address[]"
+                }
+            ],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "constant": false,
+            "inputs": [
+                {
+                    "name": "newOwner",
+                    "type": "address"
+                }
+            ],
+            "name": "transferOwnership",
+            "outputs": [],
+            "payable": false,
+            "type": "function"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "target",
+                    "type": "address"
+                },
+                {
+                    "indexed": true,
+                    "name": "caller",
+                    "type": "address"
+                }
+            ],
+            "name": "LogAuthorizedAddressAdded",
+            "type": "event"
+        },
+        {
+            "anonymous": false,
+            "inputs": [
+                {
+                    "indexed": true,
+                    "name": "target",
+                    "type": "address"
+                },
+                {
+                    "indexed": true,
+                    "name": "caller",
+                    "type": "address"
+                }
+            ],
+            "name": "LogAuthorizedAddressRemoved",
+            "type": "event"
+        }
+    ],
+    "networks": {
+        "1": {
+            "address": "0x8da0d80f5007ef1e431dd2127178d224e32c2ef4"
+        },
+        "3": {
+            "address": "0x4e9aad8184de8833365fea970cd9149372fdf1e6"
+        },
+        "4": {
+            "address": "0xa8e9fa8f91e5ae138c74648c9c304f1c75003a8d"
+        },
+        "42": {
+            "address": "0x087eed4bc1ee3de49befbd66c662b434b15d49d4"
+        },
+        "50": {
+            "address": "0x1dc4c1cefef38a777b15aa20260a54e584b16c48"
+        }
+    }
+}
--- a/packages/contract-wrappers/src/compact_artifacts/ZRX.json
+++ b/packages/contract-wrappers/src/compact_artifacts/ZRX.json
@@ -0,0 +1,20 @@
+{
+    "contract_name": "ZRX",
+    "networks": {
+        "1": {
+            "address": "0xe41d2489571d322189246dafa5ebde1f4699f498"
+        },
+        "3": {
+            "address": "0xa8e9fa8f91e5ae138c74648c9c304f1c75003a8d"
+        },
+        "4": {
+            "address": "0x00f58d6d585f84b2d7267940cede30ce2fe6eae8"
+        },
+        "42": {
+            "address": "0x6ff6c0ff1d68b964901f986d4c9fa3ac68346570"
+        },
+        "50": {
+            "address": "0x1d7022f5b17d2f8b695918fb48fa1089c9f85401"
+        }
+    }
+}
--- a/packages/contract-wrappers/src/contract_wrappers.ts
+++ b/packages/contract-wrappers/src/contract_wrappers.ts
@@ -0,0 +1,112 @@
+import { Provider } from '@0xproject/types';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import * as _ from 'lodash';
+
+import { artifacts } from './artifacts';
+import { EtherTokenWrapper } from './contract_wrappers/ether_token_wrapper';
+import { ExchangeWrapper } from './contract_wrappers/exchange_wrapper';
+import { TokenRegistryWrapper } from './contract_wrappers/token_registry_wrapper';
+import { TokenTransferProxyWrapper } from './contract_wrappers/token_transfer_proxy_wrapper';
+import { TokenWrapper } from './contract_wrappers/token_wrapper';
+import { ContractWrappersConfigSchema } from './schemas/contract_wrappers_config_schema';
+import { contractWrappersPrivateNetworkConfigSchema } from './schemas/contract_wrappers_private_network_config_schema';
+import { contractWrappersPublicNetworkConfigSchema } from './schemas/contract_wrappers_public_network_config_schema';
+import { ContractWrappersConfig } from './types';
+import { assert } from './utils/assert';
+/**
+ * The ContractWrappers class contains smart contract wrappers helpful when building on 0x protocol.
+ */
+export class ContractWrappers {
+    /**
+     * An instance of the ExchangeWrapper class containing methods for interacting with the 0x Exchange smart contract.
+     */
+    public exchange: ExchangeWrapper;
+    /**
+     * An instance of the TokenRegistryWrapper class containing methods for interacting with the 0x
+     * TokenRegistry smart contract.
+     */
+    public tokenRegistry: TokenRegistryWrapper;
+    /**
+     * An instance of the TokenWrapper class containing methods for interacting with any ERC20 token smart contract.
+     */
+    public token: TokenWrapper;
+    /**
+     * An instance of the EtherTokenWrapper class containing methods for interacting with the
+     * wrapped ETH ERC20 token smart contract.
+     */
+    public etherToken: EtherTokenWrapper;
+    /**
+     * An instance of the TokenTransferProxyWrapper class containing methods for interacting with the
+     * tokenTransferProxy smart contract.
+     */
+    public proxy: TokenTransferProxyWrapper;
+    private _web3Wrapper: Web3Wrapper;
+    /**
+     * Instantiates a new ContractWrappers instance.
+     * @param   provider    The Provider instance you would like the 0x.js library to use for interacting with
+     *                      the Ethereum network.
+     * @param   config      The configuration object. Look up the type for the description.
+     * @return  An instance of the ContractWrappers class.
+     */
+    constructor(provider: Provider, config: ContractWrappersConfig) {
+        assert.isWeb3Provider('provider', provider);
+        assert.doesConformToSchema('config', config, ContractWrappersConfigSchema, [
+            contractWrappersPrivateNetworkConfigSchema,
+            contractWrappersPublicNetworkConfigSchema,
+        ]);
+        const artifactJSONs = _.values(artifacts);
+        const abiArrays = _.map(artifactJSONs, artifact => artifact.abi);
+        const txDefaults = {
+            gasPrice: config.gasPrice,
+        };
+        this._web3Wrapper = new Web3Wrapper(provider, txDefaults);
+        _.forEach(abiArrays, abi => {
+            this._web3Wrapper.abiDecoder.addABI(abi);
+        });
+        this.proxy = new TokenTransferProxyWrapper(
+            this._web3Wrapper,
+            config.networkId,
+            config.tokenTransferProxyContractAddress,
+        );
+        this.token = new TokenWrapper(this._web3Wrapper, config.networkId, this.proxy);
+        this.exchange = new ExchangeWrapper(
+            this._web3Wrapper,
+            config.networkId,
+            this.token,
+            config.exchangeContractAddress,
+            config.zrxContractAddress,
+        );
+        this.tokenRegistry = new TokenRegistryWrapper(
+            this._web3Wrapper,
+            config.networkId,
+            config.tokenRegistryContractAddress,
+        );
+        this.etherToken = new EtherTokenWrapper(this._web3Wrapper, config.networkId, this.token);
+    }
+    /**
+     * Sets a new web3 provider for 0x.js. Updating the provider will stop all
+     * subscriptions so you will need to re-subscribe to all events relevant to your app after this call.
+     * @param   provider    The Web3Provider you would like the 0x.js library to use from now on.
+     * @param   networkId   The id of the network your provider is connected to
+     */
+    public setProvider(provider: Provider, networkId: number): void {
+        this._web3Wrapper.setProvider(provider);
+        (this.exchange as any)._invalidateContractInstances();
+        (this.exchange as any)._setNetworkId(networkId);
+        (this.tokenRegistry as any)._invalidateContractInstance();
+        (this.tokenRegistry as any)._setNetworkId(networkId);
+        (this.token as any)._invalidateContractInstances();
+        (this.token as any)._setNetworkId(networkId);
+        (this.proxy as any)._invalidateContractInstance();
+        (this.proxy as any)._setNetworkId(networkId);
+        (this.etherToken as any)._invalidateContractInstance();
+        (this.etherToken as any)._setNetworkId(networkId);
+    }
+    /**
+     * Get the provider instance currently used by 0x.js
+     * @return  Web3 provider instance
+     */
+    public getProvider(): Provider {
+        return this._web3Wrapper.getProvider();
+    }
+}
--- a/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
@@ -1,35 +1,42 @@
-import { BlockParamLiteral, ContractAbi, FilterObject, LogEntry, LogWithDecodedArgs, RawLog } from '@0xproject/types';
-import { AbiDecoder, intervalUtils } from '@0xproject/utils';
+import {
+    Artifact,
+    BlockParamLiteral,
+    ContractAbi,
+    FilterObject,
+    LogEntry,
+    LogWithDecodedArgs,
+    RawLog,
+} from '@0xproject/types';
+import { intervalUtils } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import { Block, BlockAndLogStreamer } from 'ethereumjs-blockstream';
 import * as _ from 'lodash';
-import * as Web3 from 'web3';

 import {
-    Artifact,
    BlockRange,
    ContractEventArgs,
    ContractEvents,
+    ContractWrappersError,
    EventCallback,
    IndexedFilterValues,
-    InternalZeroExError,
-    ZeroExError,
+    InternalContractWrappersError,
 } from '../types';
 import { constants } from '../utils/constants';
 import { filterUtils } from '../utils/filter_utils';

 const CONTRACT_NAME_TO_NOT_FOUND_ERROR: {
-    [contractName: string]: ZeroExError;
+    [contractName: string]: ContractWrappersError;
 } = {
-    ZRX: ZeroExError.ZRXContractDoesNotExist,
-    EtherToken: ZeroExError.EtherTokenContractDoesNotExist,
-    Token: ZeroExError.TokenContractDoesNotExist,
-    TokenRegistry: ZeroExError.TokenRegistryContractDoesNotExist,
-    TokenTransferProxy: ZeroExError.TokenTransferProxyContractDoesNotExist,
-    Exchange: ZeroExError.ExchangeContractDoesNotExist,
+    ZRX: ContractWrappersError.ZRXContractDoesNotExist,
+    EtherToken: ContractWrappersError.EtherTokenContractDoesNotExist,
+    Token: ContractWrappersError.TokenContractDoesNotExist,
+    TokenRegistry: ContractWrappersError.TokenRegistryContractDoesNotExist,
+    TokenTransferProxy: ContractWrappersError.TokenTransferProxyContractDoesNotExist,
+    Exchange: ContractWrappersError.ExchangeContractDoesNotExist,
 };

-export class ContractWrapper {
+export abstract class ContractWrapper {
+    public abstract abi: ContractAbi;
    protected _web3Wrapper: Web3Wrapper;
    protected _networkId: number;
    private _blockAndLogStreamerIfExists?: BlockAndLogStreamer;
@@ -57,7 +64,7 @@ export class ContractWrapper {
    }
    protected _unsubscribe(filterToken: string, err?: Error): void {
        if (_.isUndefined(this._filters[filterToken])) {
-            throw new Error(ZeroExError.SubscriptionNotFound);
+            throw new Error(ContractWrappersError.SubscriptionNotFound);
        }
        if (!_.isUndefined(err)) {
            const callback = this._filterCallbacks[filterToken];
@@ -101,7 +108,7 @@ export class ContractWrapper {
        log: LogEntry,
    ): LogWithDecodedArgs<ArgsType> | RawLog {
        if (_.isUndefined(this._web3Wrapper.abiDecoder)) {
-            throw new Error(InternalZeroExError.NoAbiDecoder);
+            throw new Error(InternalContractWrappersError.NoAbiDecoder);
        }
        const logWithDecodedArgs = this._web3Wrapper.abiDecoder.tryToDecodeLogOrNoop(log);
        return logWithDecodedArgs;
@@ -113,7 +120,7 @@ export class ContractWrapper {
        let contractAddress: string;
        if (_.isUndefined(addressIfExists)) {
            if (_.isUndefined(artifact.networks[this._networkId])) {
-                throw new Error(ZeroExError.ContractNotDeployedOnNetwork);
+                throw new Error(ContractWrappersError.ContractNotDeployedOnNetwork);
            }
            contractAddress = artifact.networks[this._networkId].address.toLowerCase();
        } else {
@@ -130,7 +137,7 @@ export class ContractWrapper {
        if (_.isUndefined(addressIfExists)) {
            const contractAddress = artifact.networks[this._networkId].address;
            if (_.isUndefined(contractAddress)) {
-                throw new Error(ZeroExError.ExchangeContractDoesNotExist);
+                throw new Error(ContractWrappersError.ExchangeContractDoesNotExist);
            }
            return contractAddress;
        } else {
@@ -151,7 +158,7 @@ export class ContractWrapper {
    }
    private _startBlockAndLogStream(): void {
        if (!_.isUndefined(this._blockAndLogStreamerIfExists)) {
-            throw new Error(ZeroExError.SubscriptionAlreadyPresent);
+            throw new Error(ContractWrappersError.SubscriptionAlreadyPresent);
        }
        this._blockAndLogStreamerIfExists = new BlockAndLogStreamer(
            this._web3Wrapper.getBlockAsync.bind(this._web3Wrapper),
@@ -179,12 +186,13 @@ export class ContractWrapper {
            this._unsubscribe(filterToken, err);
        });
    }
+    // tslint:disable-next-line:no-unused-variable
    private _setNetworkId(networkId: number): void {
        this._networkId = networkId;
    }
    private _stopBlockAndLogStream(): void {
        if (_.isUndefined(this._blockAndLogStreamerIfExists)) {
-            throw new Error(ZeroExError.SubscriptionNotFound);
+            throw new Error(ContractWrappersError.SubscriptionNotFound);
        }
        this._blockAndLogStreamerIfExists.unsubscribeFromOnLogAdded(this._onLogAddedSubscriptionToken as string);
        this._blockAndLogStreamerIfExists.unsubscribeFromOnLogRemoved(this._onLogRemovedSubscriptionToken as string);
--- a/packages/contract-wrappers/src/contract_wrappers/ether_token_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/ether_token_wrapper.ts
@@ -1,11 +1,11 @@
 import { schemas } from '@0xproject/json-schemas';
-import { LogWithDecodedArgs } from '@0xproject/types';
-import { AbiDecoder, BigNumber } from '@0xproject/utils';
+import { ContractAbi, LogWithDecodedArgs } from '@0xproject/types';
+import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';

 import { artifacts } from '../artifacts';
-import { BlockRange, EventCallback, IndexedFilterValues, TransactionOpts, ZeroExError } from '../types';
+import { BlockRange, ContractWrappersError, EventCallback, IndexedFilterValues, TransactionOpts } from '../types';
 import { assert } from '../utils/assert';

 import { ContractWrapper } from './contract_wrapper';
@@ -17,6 +17,7 @@ import { TokenWrapper } from './token_wrapper';
 * The caller can convert ETH into the equivalent number of wrapped ETH ERC20 tokens and back.
 */
 export class EtherTokenWrapper extends ContractWrapper {
+    public abi: ContractAbi = artifacts.EtherToken.abi;
    private _etherTokenContractsByAddress: {
        [address: string]: EtherTokenContract;
    } = {};
@@ -48,7 +49,7 @@ export class EtherTokenWrapper extends ContractWrapper {
        const normalizedDepositorAddress = depositor.toLowerCase();

        const ethBalanceInWei = await this._web3Wrapper.getBalanceInWeiAsync(normalizedDepositorAddress);
-        assert.assert(ethBalanceInWei.gte(amountInWei), ZeroExError.InsufficientEthBalanceForDeposit);
+        assert.assert(ethBalanceInWei.gte(amountInWei), ContractWrappersError.InsufficientEthBalanceForDeposit);

        const wethContract = await this._getEtherTokenContractAsync(normalizedEtherTokenAddress);
        const txHash = await wethContract.deposit.sendTransactionAsync({
@@ -84,7 +85,10 @@ export class EtherTokenWrapper extends ContractWrapper {
            normalizedEtherTokenAddress,
            normalizedWithdrawerAddress,
        );
-        assert.assert(WETHBalanceInBaseUnits.gte(amountInWei), ZeroExError.InsufficientWEthBalanceForWithdrawal);
+        assert.assert(
+            WETHBalanceInBaseUnits.gte(amountInWei),
+            ContractWrappersError.InsufficientWEthBalanceForWithdrawal,
+        );

        const wethContract = await this._getEtherTokenContractAsync(normalizedEtherTokenAddress);
        const txHash = await wethContract.withdraw.sendTransactionAsync(amountInWei, {
@@ -119,7 +123,7 @@ export class EtherTokenWrapper extends ContractWrapper {
            eventName,
            blockRange,
            indexFilterValues,
-            artifacts.EtherTokenArtifact.abi,
+            artifacts.EtherToken.abi,
        );
        return logs;
    }
@@ -147,7 +151,7 @@ export class EtherTokenWrapper extends ContractWrapper {
            normalizedEtherTokenAddress,
            eventName,
            indexFilterValues,
-            artifacts.EtherTokenArtifact.abi,
+            artifacts.EtherToken.abi,
            callback,
        );
        return subscriptionToken;
@@ -172,12 +176,13 @@ export class EtherTokenWrapper extends ContractWrapper {
     * @returns The Ethereum address of the EtherToken contract or undefined.
     */
    public getContractAddressIfExists(): string | undefined {
-        const networkSpecificArtifact = artifacts.EtherTokenArtifact.networks[this._networkId];
+        const networkSpecificArtifact = artifacts.EtherToken.networks[this._networkId];
        const contractAddressIfExists = _.isUndefined(networkSpecificArtifact)
            ? undefined
            : networkSpecificArtifact.address;
        return contractAddressIfExists;
    }
+    // tslint:disable-next-line:no-unused-variable
    private _invalidateContractInstance(): void {
        this.unsubscribeAll();
        this._etherTokenContractsByAddress = {};
@@ -188,7 +193,7 @@ export class EtherTokenWrapper extends ContractWrapper {
            return etherTokenContract;
        }
        const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(
-            artifacts.EtherTokenArtifact,
+            artifacts.EtherToken,
            etherTokenAddress,
        );
        const contractInstance = new EtherTokenContract(
--- a/packages/contract-wrappers/src/contract_wrappers/exchange_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/exchange_wrapper.ts
@@ -1,37 +1,40 @@
 import { schemas } from '@0xproject/json-schemas';
+import { formatters, getOrderHashHex, OrderStateUtils } from '@0xproject/order-utils';
 import {
    BlockParamLiteral,
+    ContractAbi,
    DecodedLogArgs,
    ECSignature,
+    ExchangeContractErrs,
    LogEntry,
    LogWithDecodedArgs,
    Order,
+    OrderState,
    SignedOrder,
 } from '@0xproject/types';
-import { AbiDecoder, BigNumber } from '@0xproject/utils';
+import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';

 import { artifacts } from '../artifacts';
+import { SimpleBalanceAndProxyAllowanceFetcher } from '../fetchers/simple_balance_and_proxy_allowance_fetcher';
+import { SimpleOrderFilledCancelledFetcher } from '../fetchers/simple_order_filled_cancelled_fetcher';
+import { BalanceAndProxyAllowanceLazyStore } from '../stores/balance_proxy_allowance_lazy_store';
 import {
    BlockRange,
    EventCallback,
    ExchangeContractErrCodes,
-    ExchangeContractErrs,
    IndexedFilterValues,
    MethodOpts,
-    OrderAddresses,
    OrderCancellationRequest,
    OrderFillRequest,
    OrderTransactionOpts,
-    OrderValues,
    ValidateOrderFillableOpts,
 } from '../types';
 import { assert } from '../utils/assert';
 import { decorators } from '../utils/decorators';
 import { ExchangeTransferSimulator } from '../utils/exchange_transfer_simulator';
 import { OrderValidationUtils } from '../utils/order_validation_utils';
-import { utils } from '../utils/utils';

 import { ContractWrapper } from './contract_wrapper';
 import {
@@ -41,7 +44,6 @@ import {
    LogErrorContractEventArgs,
 } from './generated/exchange';
 import { TokenWrapper } from './token_wrapper';
-
 const SHOULD_VALIDATE_BY_DEFAULT = true;

 interface ExchangeContractErrCodesToMsgs {
@@ -53,8 +55,9 @@ interface ExchangeContractErrCodesToMsgs {
 * events of the 0x Exchange smart contract.
 */
 export class ExchangeWrapper extends ContractWrapper {
+    public abi: ContractAbi = artifacts.Exchange.abi;
    private _exchangeContractIfExists?: ExchangeContract;
-    private _orderValidationUtils: OrderValidationUtils;
+    private _orderValidationUtilsIfExists?: OrderValidationUtils;
    private _tokenWrapper: TokenWrapper;
    private _exchangeContractErrCodesToMsg: ExchangeContractErrCodesToMsgs = {
        [ExchangeContractErrCodes.ERROR_FILL_EXPIRED]: ExchangeContractErrs.OrderFillExpired,
@@ -66,24 +69,6 @@ export class ExchangeWrapper extends ContractWrapper {
    };
    private _contractAddressIfExists?: string;
    private _zrxContractAddressIfExists?: string;
-    private static _getOrderAddressesAndValues(order: Order): [OrderAddresses, OrderValues] {
-        const orderAddresses: OrderAddresses = [
-            order.maker,
-            order.taker,
-            order.makerTokenAddress,
-            order.takerTokenAddress,
-            order.feeRecipient,
-        ];
-        const orderValues: OrderValues = [
-            order.makerTokenAmount,
-            order.takerTokenAmount,
-            order.makerFee,
-            order.takerFee,
-            order.expirationUnixTimestampSec,
-            order.salt,
-        ];
-        return [orderAddresses, orderValues];
-    }
    constructor(
        web3Wrapper: Web3Wrapper,
        networkId: number,
@@ -93,7 +78,6 @@ export class ExchangeWrapper extends ContractWrapper {
    ) {
        super(web3Wrapper, networkId);
        this._tokenWrapper = tokenWrapper;
-        this._orderValidationUtils = new OrderValidationUtils(this);
        this._contractAddressIfExists = contractAddressIfExists;
        this._zrxContractAddressIfExists = zrxContractAddressIfExists;
    }
@@ -195,8 +179,13 @@ export class ExchangeWrapper extends ContractWrapper {
            : orderTransactionOpts.shouldValidate;
        if (shouldValidate) {
            const zrxTokenAddress = this.getZRXTokenAddress();
-            const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
-            await this._orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
+            const balanceAndProxyAllowanceLazyStore = new BalanceAndProxyAllowanceLazyStore(
+                this._tokenWrapper,
+                BlockParamLiteral.Latest,
+            );
+            const exchangeTradeEmulator = new ExchangeTransferSimulator(balanceAndProxyAllowanceLazyStore);
+            const orderValidationUtils = await this._getOrderValidationUtilsAsync();
+            await orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
                exchangeTradeEmulator,
                signedOrder,
                fillTakerTokenAmount,
@@ -205,7 +194,7 @@ export class ExchangeWrapper extends ContractWrapper {
            );
        }

-        const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(signedOrder);
+        const [orderAddresses, orderValues] = formatters.getOrderAddressesAndValues(signedOrder);

        const txHash: string = await exchangeInstance.fillOrder.sendTransactionAsync(
            orderAddresses,
@@ -270,9 +259,14 @@ export class ExchangeWrapper extends ContractWrapper {
        if (shouldValidate) {
            let filledTakerTokenAmount = new BigNumber(0);
            const zrxTokenAddress = this.getZRXTokenAddress();
-            const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
+            const balanceAndProxyAllowanceLazyStore = new BalanceAndProxyAllowanceLazyStore(
+                this._tokenWrapper,
+                BlockParamLiteral.Latest,
+            );
+            const exchangeTradeEmulator = new ExchangeTransferSimulator(balanceAndProxyAllowanceLazyStore);
+            const orderValidationUtils = await this._getOrderValidationUtilsAsync();
            for (const signedOrder of signedOrders) {
-                const singleFilledTakerTokenAmount = await this._orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
+                const singleFilledTakerTokenAmount = await orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
                    exchangeTradeEmulator,
                    signedOrder,
                    fillTakerTokenAmount.minus(filledTakerTokenAmount),
@@ -292,7 +286,7 @@ export class ExchangeWrapper extends ContractWrapper {

        const orderAddressesValuesAndSignatureArray = _.map(signedOrders, signedOrder => {
            return [
-                ...ExchangeWrapper._getOrderAddressesAndValues(signedOrder),
+                ...formatters.getOrderAddressesAndValues(signedOrder),
                signedOrder.ecSignature.v,
                signedOrder.ecSignature.r,
                signedOrder.ecSignature.s,
@@ -363,9 +357,14 @@ export class ExchangeWrapper extends ContractWrapper {
            : orderTransactionOpts.shouldValidate;
        if (shouldValidate) {
            const zrxTokenAddress = this.getZRXTokenAddress();
-            const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
+            const balanceAndProxyAllowanceLazyStore = new BalanceAndProxyAllowanceLazyStore(
+                this._tokenWrapper,
+                BlockParamLiteral.Latest,
+            );
+            const exchangeTradeEmulator = new ExchangeTransferSimulator(balanceAndProxyAllowanceLazyStore);
+            const orderValidationUtils = await this._getOrderValidationUtilsAsync();
            for (const orderFillRequest of orderFillRequests) {
-                await this._orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
+                await orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
                    exchangeTradeEmulator,
                    orderFillRequest.signedOrder,
                    orderFillRequest.takerTokenFillAmount,
@@ -380,7 +379,7 @@ export class ExchangeWrapper extends ContractWrapper {

        const orderAddressesValuesAmountsAndSignatureArray = _.map(orderFillRequests, orderFillRequest => {
            return [
-                ...ExchangeWrapper._getOrderAddressesAndValues(orderFillRequest.signedOrder),
+                ...formatters.getOrderAddressesAndValues(orderFillRequest.signedOrder),
                orderFillRequest.takerTokenFillAmount,
                orderFillRequest.signedOrder.ecSignature.v,
                orderFillRequest.signedOrder.ecSignature.r,
@@ -439,8 +438,13 @@ export class ExchangeWrapper extends ContractWrapper {
            : orderTransactionOpts.shouldValidate;
        if (shouldValidate) {
            const zrxTokenAddress = this.getZRXTokenAddress();
-            const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
-            await this._orderValidationUtils.validateFillOrKillOrderThrowIfInvalidAsync(
+            const balanceAndProxyAllowanceLazyStore = new BalanceAndProxyAllowanceLazyStore(
+                this._tokenWrapper,
+                BlockParamLiteral.Latest,
+            );
+            const exchangeTradeEmulator = new ExchangeTransferSimulator(balanceAndProxyAllowanceLazyStore);
+            const orderValidationUtils = await this._getOrderValidationUtilsAsync();
+            await orderValidationUtils.validateFillOrKillOrderThrowIfInvalidAsync(
                exchangeTradeEmulator,
                signedOrder,
                fillTakerTokenAmount,
@@ -449,7 +453,7 @@ export class ExchangeWrapper extends ContractWrapper {
            );
        }

-        const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(signedOrder);
+        const [orderAddresses, orderValues] = formatters.getOrderAddressesAndValues(signedOrder);
        const txHash = await exchangeInstance.fillOrKillOrder.sendTransactionAsync(
            orderAddresses,
            orderValues,
@@ -501,9 +505,14 @@ export class ExchangeWrapper extends ContractWrapper {
            : orderTransactionOpts.shouldValidate;
        if (shouldValidate) {
            const zrxTokenAddress = this.getZRXTokenAddress();
-            const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
+            const balanceAndProxyAllowanceLazyStore = new BalanceAndProxyAllowanceLazyStore(
+                this._tokenWrapper,
+                BlockParamLiteral.Latest,
+            );
+            const exchangeTradeEmulator = new ExchangeTransferSimulator(balanceAndProxyAllowanceLazyStore);
+            const orderValidationUtils = await this._getOrderValidationUtilsAsync();
            for (const orderFillRequest of orderFillRequests) {
-                await this._orderValidationUtils.validateFillOrKillOrderThrowIfInvalidAsync(
+                await orderValidationUtils.validateFillOrKillOrderThrowIfInvalidAsync(
                    exchangeTradeEmulator,
                    orderFillRequest.signedOrder,
                    orderFillRequest.takerTokenFillAmount,
@@ -515,7 +524,7 @@ export class ExchangeWrapper extends ContractWrapper {

        const orderAddressesValuesAndTakerTokenFillAmounts = _.map(orderFillRequests, request => {
            return [
-                ...ExchangeWrapper._getOrderAddressesAndValues(request.signedOrder),
+                ...formatters.getOrderAddressesAndValues(request.signedOrder),
                request.takerTokenFillAmount,
                request.signedOrder.ecSignature.v,
                request.signedOrder.ecSignature.r,
@@ -567,7 +576,7 @@ export class ExchangeWrapper extends ContractWrapper {
            ? SHOULD_VALIDATE_BY_DEFAULT
            : orderTransactionOpts.shouldValidate;
        if (shouldValidate) {
-            const orderHash = utils.getOrderHashHex(order);
+            const orderHash = getOrderHashHex(order);
            const unavailableTakerTokenAmount = await this.getUnavailableTakerAmountAsync(orderHash);
            OrderValidationUtils.validateCancelOrderThrowIfInvalid(
                order,
@@ -576,7 +585,7 @@ export class ExchangeWrapper extends ContractWrapper {
            );
        }

-        const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(order);
+        const [orderAddresses, orderValues] = formatters.getOrderAddressesAndValues(order);
        const txHash = await exchangeInstance.cancelOrder.sendTransactionAsync(
            orderAddresses,
            orderValues,
@@ -626,7 +635,7 @@ export class ExchangeWrapper extends ContractWrapper {
            : orderTransactionOpts.shouldValidate;
        if (shouldValidate) {
            for (const orderCancellationRequest of orderCancellationRequests) {
-                const orderHash = utils.getOrderHashHex(orderCancellationRequest.order);
+                const orderHash = getOrderHashHex(orderCancellationRequest.order);
                const unavailableTakerTokenAmount = await this.getUnavailableTakerAmountAsync(orderHash);
                OrderValidationUtils.validateCancelOrderThrowIfInvalid(
                    orderCancellationRequest.order,
@@ -641,7 +650,7 @@ export class ExchangeWrapper extends ContractWrapper {
        const exchangeInstance = await this._getExchangeContractAsync();
        const orderAddressesValuesAndTakerTokenCancelAmounts = _.map(orderCancellationRequests, cancellationRequest => {
            return [
-                ...ExchangeWrapper._getOrderAddressesAndValues(cancellationRequest.order),
+                ...formatters.getOrderAddressesAndValues(cancellationRequest.order),
                cancellationRequest.takerTokenCancelAmount,
            ];
        });
@@ -682,7 +691,7 @@ export class ExchangeWrapper extends ContractWrapper {
            exchangeContractAddress,
            eventName,
            indexFilterValues,
-            artifacts.ExchangeArtifact.abi,
+            artifacts.Exchange.abi,
            callback,
        );
        return subscriptionToken;
@@ -722,7 +731,7 @@ export class ExchangeWrapper extends ContractWrapper {
            eventName,
            blockRange,
            indexFilterValues,
-            artifacts.ExchangeArtifact.abi,
+            artifacts.Exchange.abi,
        );
        return logs;
    }
@@ -732,7 +741,7 @@ export class ExchangeWrapper extends ContractWrapper {
     * @returns The Ethereum address of the Exchange contract being used.
     */
    public getContractAddress(): string {
-        const contractAddress = this._getContractAddress(artifacts.ExchangeArtifact, this._contractAddressIfExists);
+        const contractAddress = this._getContractAddress(artifacts.Exchange, this._contractAddressIfExists);
        return contractAddress;
    }
    /**
@@ -751,8 +760,13 @@ export class ExchangeWrapper extends ContractWrapper {
        assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
        const zrxTokenAddress = this.getZRXTokenAddress();
        const expectedFillTakerTokenAmount = !_.isUndefined(opts) ? opts.expectedFillTakerTokenAmount : undefined;
-        const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
-        await this._orderValidationUtils.validateOrderFillableOrThrowAsync(
+        const balanceAndProxyAllowanceLazyStore = new BalanceAndProxyAllowanceLazyStore(
+            this._tokenWrapper,
+            BlockParamLiteral.Latest,
+        );
+        const exchangeTradeEmulator = new ExchangeTransferSimulator(balanceAndProxyAllowanceLazyStore);
+        const orderValidationUtils = await this._getOrderValidationUtilsAsync();
+        await orderValidationUtils.validateOrderFillableOrThrowAsync(
            exchangeTradeEmulator,
            signedOrder,
            zrxTokenAddress,
@@ -777,8 +791,13 @@ export class ExchangeWrapper extends ContractWrapper {
        await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
        const normalizedTakerAddress = takerAddress.toLowerCase();
        const zrxTokenAddress = this.getZRXTokenAddress();
-        const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
-        await this._orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
+        const balanceAndProxyAllowanceLazyStore = new BalanceAndProxyAllowanceLazyStore(
+            this._tokenWrapper,
+            BlockParamLiteral.Latest,
+        );
+        const exchangeTradeEmulator = new ExchangeTransferSimulator(balanceAndProxyAllowanceLazyStore);
+        const orderValidationUtils = await this._getOrderValidationUtilsAsync();
+        await orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
            exchangeTradeEmulator,
            signedOrder,
            fillTakerTokenAmount,
@@ -798,7 +817,7 @@ export class ExchangeWrapper extends ContractWrapper {
    ): Promise<void> {
        assert.doesConformToSchema('order', order, schemas.orderSchema);
        assert.isValidBaseUnitAmount('cancelTakerTokenAmount', cancelTakerTokenAmount);
-        const orderHash = utils.getOrderHashHex(order);
+        const orderHash = getOrderHashHex(order);
        const unavailableTakerTokenAmount = await this.getUnavailableTakerAmountAsync(orderHash);
        OrderValidationUtils.validateCancelOrderThrowIfInvalid(
            order,
@@ -824,8 +843,13 @@ export class ExchangeWrapper extends ContractWrapper {
        await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
        const normalizedTakerAddress = takerAddress.toLowerCase();
        const zrxTokenAddress = this.getZRXTokenAddress();
-        const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
-        await this._orderValidationUtils.validateFillOrKillOrderThrowIfInvalidAsync(
+        const balanceAndProxyAllowanceLazyStore = new BalanceAndProxyAllowanceLazyStore(
+            this._tokenWrapper,
+            BlockParamLiteral.Latest,
+        );
+        const exchangeTradeEmulator = new ExchangeTransferSimulator(balanceAndProxyAllowanceLazyStore);
+        const orderValidationUtils = await this._getOrderValidationUtilsAsync();
+        await orderValidationUtils.validateFillOrKillOrderThrowIfInvalidAsync(
            exchangeTradeEmulator,
            signedOrder,
            fillTakerTokenAmount,
@@ -873,14 +897,37 @@ export class ExchangeWrapper extends ContractWrapper {
            throw new Error(errMessage);
        }
    }
+    /**
+     * Gets the latest OrderState of a signedOrder
+     * @param   signedOrder   The signedOrder
+     * @param   stateLayer    Optional, desired blockchain state layer (defaults to latest).
+     * @return  OrderState of the signedOrder
+     */
+    public async getOrderStateAsync(
+        signedOrder: SignedOrder,
+        stateLayer: BlockParamLiteral = BlockParamLiteral.Latest,
+    ): Promise<OrderState> {
+        const simpleBalanceAndProxyAllowanceFetcher = new SimpleBalanceAndProxyAllowanceFetcher(
+            this._tokenWrapper,
+            stateLayer,
+        );
+        const simpleOrderFilledCancelledFetcher = new SimpleOrderFilledCancelledFetcher(this, stateLayer);
+        const orderStateUtils = new OrderStateUtils(
+            simpleBalanceAndProxyAllowanceFetcher,
+            simpleOrderFilledCancelledFetcher,
+        );
+        const orderState = orderStateUtils.getOrderStateAsync(signedOrder);
+        return orderState;
+    }
    /**
     * Returns the ZRX token address used by the exchange contract.
     * @return Address of ZRX token
     */
    public getZRXTokenAddress(): string {
-        const contractAddress = this._getContractAddress(artifacts.ZRXArtifact, this._zrxContractAddressIfExists);
+        const contractAddress = this._getContractAddress(artifacts.ZRX, this._zrxContractAddressIfExists);
        return contractAddress;
    }
+    // tslint:disable:no-unused-variable
    private _invalidateContractInstances(): void {
        this.unsubscribeAll();
        delete this._exchangeContractIfExists;
@@ -908,16 +955,25 @@ export class ExchangeWrapper extends ContractWrapper {
    }
    private async _getOrderHashHexUsingContractCallAsync(order: Order | SignedOrder): Promise<string> {
        const exchangeInstance = await this._getExchangeContractAsync();
-        const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(order);
+        const [orderAddresses, orderValues] = formatters.getOrderAddressesAndValues(order);
        const orderHashHex = await exchangeInstance.getOrderHash.callAsync(orderAddresses, orderValues);
        return orderHashHex;
    }
+    private async _getOrderValidationUtilsAsync(): Promise<OrderValidationUtils> {
+        if (!_.isUndefined(this._orderValidationUtilsIfExists)) {
+            return this._orderValidationUtilsIfExists;
+        }
+        const exchangeContract = await this._getExchangeContractAsync();
+        this._orderValidationUtilsIfExists = new OrderValidationUtils(exchangeContract);
+        return this._orderValidationUtilsIfExists;
+    }
+    // tslint:enable:no-unused-variable
    private async _getExchangeContractAsync(): Promise<ExchangeContract> {
        if (!_.isUndefined(this._exchangeContractIfExists)) {
            return this._exchangeContractIfExists;
        }
        const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(
-            artifacts.ExchangeArtifact,
+            artifacts.Exchange,
            this._contractAddressIfExists,
        );
        const contractInstance = new ExchangeContract(
@@ -929,10 +985,4 @@ export class ExchangeWrapper extends ContractWrapper {
        this._exchangeContractIfExists = contractInstance;
        return this._exchangeContractIfExists;
    }
-    private async _getTokenTransferProxyAddressAsync(): Promise<string> {
-        const exchangeInstance = await this._getExchangeContractAsync();
-        const tokenTransferProxyAddress = await exchangeInstance.TOKEN_TRANSFER_PROXY_CONTRACT.callAsync();
-        const tokenTransferProxyAddressLowerCase = tokenTransferProxyAddress.toLowerCase();
-        return tokenTransferProxyAddressLowerCase;
-    }
 } // tslint:disable:max-file-line-count
--- a/packages/contract-wrappers/src/contract_wrappers/token_registry_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/token_registry_wrapper.ts
@@ -1,8 +1,9 @@
+import { ContractAbi, Token } from '@0xproject/types';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';

 import { artifacts } from '../artifacts';
-import { Token, TokenMetadata } from '../types';
+import { TokenMetadata } from '../types';
 import { assert } from '../utils/assert';
 import { constants } from '../utils/constants';

@@ -13,6 +14,7 @@ import { TokenRegistryContract } from './generated/token_registry';
 * This class includes all the functionality related to interacting with the 0x Token Registry smart contract.
 */
 export class TokenRegistryWrapper extends ContractWrapper {
+    public abi: ContractAbi = artifacts.TokenRegistry.abi;
    private _tokenRegistryContractIfExists?: TokenRegistryContract;
    private _contractAddressIfExists?: string;
    private static _createTokenFromMetadata(metadata: TokenMetadata): Token | undefined {
@@ -104,12 +106,10 @@ export class TokenRegistryWrapper extends ContractWrapper {
     * @returns The Ethereum address of the TokenRegistry contract being used.
     */
    public getContractAddress(): string {
-        const contractAddress = this._getContractAddress(
-            artifacts.TokenRegistryArtifact,
-            this._contractAddressIfExists,
-        );
+        const contractAddress = this._getContractAddress(artifacts.TokenRegistry, this._contractAddressIfExists);
        return contractAddress;
    }
+    // tslint:disable-next-line:no-unused-variable
    private _invalidateContractInstance(): void {
        delete this._tokenRegistryContractIfExists;
    }
@@ -118,7 +118,7 @@ export class TokenRegistryWrapper extends ContractWrapper {
            return this._tokenRegistryContractIfExists;
        }
        const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(
-            artifacts.TokenRegistryArtifact,
+            artifacts.TokenRegistry,
            this._contractAddressIfExists,
        );
        const contractInstance = new TokenRegistryContract(
--- a/packages/contract-wrappers/src/contract_wrappers/token_transfer_proxy_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/token_transfer_proxy_wrapper.ts
@@ -1,4 +1,5 @@
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import { ContractAbi } from '@0xproject/types';
 import * as _ from 'lodash';

 import { artifacts } from '../artifacts';
@@ -11,6 +12,7 @@ import { TokenTransferProxyContract } from './generated/token_transfer_proxy';
 * This class includes the functionality related to interacting with the TokenTransferProxy contract.
 */
 export class TokenTransferProxyWrapper extends ContractWrapper {
+    public abi: ContractAbi = artifacts.TokenTransferProxy.abi;
    private _tokenTransferProxyContractIfExists?: TokenTransferProxyContract;
    private _contractAddressIfExists?: string;
    constructor(web3Wrapper: Web3Wrapper, networkId: number, contractAddressIfExists?: string) {
@@ -46,12 +48,10 @@ export class TokenTransferProxyWrapper extends ContractWrapper {
     * @returns The Ethereum address of the TokenTransferProxy contract being used.
     */
    public getContractAddress(): string {
-        const contractAddress = this._getContractAddress(
-            artifacts.TokenTransferProxyArtifact,
-            this._contractAddressIfExists,
-        );
+        const contractAddress = this._getContractAddress(artifacts.TokenTransferProxy, this._contractAddressIfExists);
        return contractAddress;
    }
+    // tslint:disable-next-line:no-unused-variable
    private _invalidateContractInstance(): void {
        delete this._tokenTransferProxyContractIfExists;
    }
@@ -60,7 +60,7 @@ export class TokenTransferProxyWrapper extends ContractWrapper {
            return this._tokenTransferProxyContractIfExists;
        }
        const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(
-            artifacts.TokenTransferProxyArtifact,
+            artifacts.TokenTransferProxy,
            this._contractAddressIfExists,
        );
        const contractInstance = new TokenTransferProxyContract(
--- a/packages/contract-wrappers/src/contract_wrappers/token_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/token_wrapper.ts
@@ -1,11 +1,18 @@
 import { schemas } from '@0xproject/json-schemas';
-import { LogWithDecodedArgs } from '@0xproject/types';
-import { AbiDecoder, BigNumber } from '@0xproject/utils';
+import { ContractAbi, LogWithDecodedArgs } from '@0xproject/types';
+import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';

 import { artifacts } from '../artifacts';
-import { BlockRange, EventCallback, IndexedFilterValues, MethodOpts, TransactionOpts, ZeroExError } from '../types';
+import {
+    BlockRange,
+    ContractWrappersError,
+    EventCallback,
+    IndexedFilterValues,
+    MethodOpts,
+    TransactionOpts,
+} from '../types';
 import { assert } from '../utils/assert';
 import { constants } from '../utils/constants';

@@ -19,6 +26,7 @@ import { TokenTransferProxyWrapper } from './token_transfer_proxy_wrapper';
 * to the 0x Proxy smart contract.
 */
 export class TokenWrapper extends ContractWrapper {
+    public abi: ContractAbi = artifacts.Token.abi;
    public UNLIMITED_ALLOWANCE_IN_BASE_UNITS = constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS;
    private _tokenContractsByAddress: { [address: string]: TokenContract };
    private _tokenTransferProxyWrapper: TokenTransferProxyWrapper;
@@ -266,7 +274,7 @@ export class TokenWrapper extends ContractWrapper {

        const fromAddressBalance = await this.getBalanceAsync(normalizedTokenAddress, normalizedFromAddress);
        if (fromAddressBalance.lessThan(amountInBaseUnits)) {
-            throw new Error(ZeroExError.InsufficientBalanceForTransfer);
+            throw new Error(ContractWrappersError.InsufficientBalanceForTransfer);
        }

        const txHash = await tokenContract.transfer.sendTransactionAsync(normalizedToAddress, amountInBaseUnits, {
@@ -316,12 +324,12 @@ export class TokenWrapper extends ContractWrapper {
            normalizedSenderAddress,
        );
        if (fromAddressAllowance.lessThan(amountInBaseUnits)) {
-            throw new Error(ZeroExError.InsufficientAllowanceForTransfer);
+            throw new Error(ContractWrappersError.InsufficientAllowanceForTransfer);
        }

        const fromAddressBalance = await this.getBalanceAsync(normalizedTokenAddress, normalizedFromAddress);
        if (fromAddressBalance.lessThan(amountInBaseUnits)) {
-            throw new Error(ZeroExError.InsufficientBalanceForTransfer);
+            throw new Error(ContractWrappersError.InsufficientBalanceForTransfer);
        }

        const txHash = await tokenContract.transferFrom.sendTransactionAsync(
@@ -360,7 +368,7 @@ export class TokenWrapper extends ContractWrapper {
            normalizedTokenAddress,
            eventName,
            indexFilterValues,
-            artifacts.TokenArtifact.abi,
+            artifacts.Token.abi,
            callback,
        );
        return subscriptionToken;
@@ -403,10 +411,11 @@ export class TokenWrapper extends ContractWrapper {
            eventName,
            blockRange,
            indexFilterValues,
-            artifacts.TokenArtifact.abi,
+            artifacts.Token.abi,
        );
        return logs;
    }
+    // tslint:disable-next-line:no-unused-variable
    private _invalidateContractInstances(): void {
        this.unsubscribeAll();
        this._tokenContractsByAddress = {};
@@ -418,7 +427,7 @@ export class TokenWrapper extends ContractWrapper {
            return tokenContract;
        }
        const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(
-            artifacts.TokenArtifact,
+            artifacts.Token,
            normalizedTokenAddress,
        );
        const contractInstance = new TokenContract(
--- a/packages/contract-wrappers/src/fetchers/simple_balance_and_proxy_allowance_fetcher.ts
+++ b/packages/contract-wrappers/src/fetchers/simple_balance_and_proxy_allowance_fetcher.ts
@@ -0,0 +1,28 @@
+import { AbstractBalanceAndProxyAllowanceFetcher } from '@0xproject/order-utils';
+import { BlockParamLiteral } from '@0xproject/types';
+import { BigNumber } from '@0xproject/utils';
+
+import { TokenWrapper } from '../contract_wrappers/token_wrapper';
+
+export class SimpleBalanceAndProxyAllowanceFetcher implements AbstractBalanceAndProxyAllowanceFetcher {
+    private _tokenWrapper: TokenWrapper;
+    private _defaultBlock: BlockParamLiteral;
+    constructor(token: TokenWrapper, defaultBlock: BlockParamLiteral) {
+        this._tokenWrapper = token;
+        this._defaultBlock = defaultBlock;
+    }
+    public async getBalanceAsync(tokenAddress: string, userAddress: string): Promise<BigNumber> {
+        const methodOpts = {
+            defaultBlock: this._defaultBlock,
+        };
+        const balance = this._tokenWrapper.getBalanceAsync(tokenAddress, userAddress, methodOpts);
+        return balance;
+    }
+    public async getProxyAllowanceAsync(tokenAddress: string, userAddress: string): Promise<BigNumber> {
+        const methodOpts = {
+            defaultBlock: this._defaultBlock,
+        };
+        const proxyAllowance = this._tokenWrapper.getProxyAllowanceAsync(tokenAddress, userAddress, methodOpts);
+        return proxyAllowance;
+    }
+}
--- a/packages/contract-wrappers/src/fetchers/simple_order_filled_cancelled_fetcher.ts
+++ b/packages/contract-wrappers/src/fetchers/simple_order_filled_cancelled_fetcher.ts
@@ -0,0 +1,36 @@
+import { AbstractOrderFilledCancelledFetcher } from '@0xproject/order-utils';
+import { BlockParamLiteral } from '@0xproject/types';
+import { BigNumber } from '@0xproject/utils';
+
+import { ExchangeWrapper } from '../contract_wrappers/exchange_wrapper';
+
+export class SimpleOrderFilledCancelledFetcher implements AbstractOrderFilledCancelledFetcher {
+    private _exchangeWrapper: ExchangeWrapper;
+    private _defaultBlock: BlockParamLiteral;
+    constructor(exchange: ExchangeWrapper, defaultBlock: BlockParamLiteral) {
+        this._exchangeWrapper = exchange;
+        this._defaultBlock = defaultBlock;
+    }
+    public async getFilledTakerAmountAsync(orderHash: string): Promise<BigNumber> {
+        const methodOpts = {
+            defaultBlock: this._defaultBlock,
+        };
+        const filledTakerAmount = this._exchangeWrapper.getFilledTakerAmountAsync(orderHash, methodOpts);
+        return filledTakerAmount;
+    }
+    public async getCancelledTakerAmountAsync(orderHash: string): Promise<BigNumber> {
+        const methodOpts = {
+            defaultBlock: this._defaultBlock,
+        };
+        const cancelledTakerAmount = this._exchangeWrapper.getCancelledTakerAmountAsync(orderHash, methodOpts);
+        return cancelledTakerAmount;
+    }
+    public async getUnavailableTakerAmountAsync(orderHash: string): Promise<BigNumber> {
+        const unavailableTakerAmount = await this._exchangeWrapper.getUnavailableTakerAmountAsync(orderHash);
+        return unavailableTakerAmount;
+    }
+    public getZRXTokenAddress(): string {
+        const zrxToken = this._exchangeWrapper.getZRXTokenAddress();
+        return zrxToken;
+    }
+}
--- a/packages/contract-wrappers/src/globals.d.ts
+++ b/packages/contract-wrappers/src/globals.d.ts
--- a/packages/contract-wrappers/src/index.ts
+++ b/packages/contract-wrappers/src/index.ts
@@ -0,0 +1,68 @@
+export { ContractWrappers } from './contract_wrappers';
+export { ExchangeWrapper } from './contract_wrappers/exchange_wrapper';
+export { TokenWrapper } from './contract_wrappers/token_wrapper';
+export { TokenRegistryWrapper } from './contract_wrappers/token_registry_wrapper';
+export { EtherTokenWrapper } from './contract_wrappers/ether_token_wrapper';
+export { TokenTransferProxyWrapper } from './contract_wrappers/token_transfer_proxy_wrapper';
+
+export {
+    ContractWrappersError,
+    EventCallback,
+    ContractEvent,
+    Token,
+    IndexedFilterValues,
+    BlockRange,
+    OrderCancellationRequest,
+    OrderFillRequest,
+    ContractEventArgs,
+    ContractWrappersConfig,
+    MethodOpts,
+    OrderTransactionOpts,
+    TransactionOpts,
+    LogEvent,
+    DecodedLogEvent,
+    OnOrderStateChangeCallback,
+} from './types';
+
+export {
+    BlockParamLiteral,
+    FilterObject,
+    BlockParam,
+    ContractEventArg,
+    ExchangeContractErrs,
+    LogWithDecodedArgs,
+    Order,
+    Provider,
+    SignedOrder,
+    ECSignature,
+    OrderStateValid,
+    OrderStateInvalid,
+    OrderState,
+    TransactionReceipt,
+    TransactionReceiptWithDecodedLogs,
+} from '@0xproject/types';
+
+export {
+    EtherTokenContractEventArgs,
+    WithdrawalContractEventArgs,
+    DepositContractEventArgs,
+    EtherTokenEvents,
+} from './contract_wrappers/generated/ether_token';
+
+export {
+    TransferContractEventArgs,
+    ApprovalContractEventArgs,
+    TokenContractEventArgs,
+    TokenEvents,
+} from './contract_wrappers/generated/token';
+
+export {
+    LogErrorContractEventArgs,
+    LogCancelContractEventArgs,
+    LogFillContractEventArgs,
+    ExchangeContractEventArgs,
+    ExchangeEvents,
+} from './contract_wrappers/generated/exchange';
+
+export { BalanceAndProxyAllowanceLazyStore } from './stores/balance_proxy_allowance_lazy_store';
+export { OrderFilledCancelledLazyStore } from './stores/order_filled_cancelled_lazy_store';
--- a/Show More
+++ b/Show More
				`@@ -1 +0,0 @@`
				`* @abandeali1 @BMillman19 @dekz @fabioberger @LogvinovLeon @Recmo`