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---
[0x][website-url] is an open protocol that facilitates trustless, low friction exchange of Ethereum-based assets. A full description of the protocol may be found in our [whitepaper][whitepaper-url].
This repository is a monorepo including the 0x protocol smart contracts and numerous developer tools. Each public sub-package is independently published to NPM.
If you're developing on 0x now or are interested in using 0x infrastructure in the future, please join our [developer mailing list][dev-mailing-list-url] for updates.
[website-url]: https://0xproject.com
[whitepaper-url]: https://0xproject.com/pdfs/0x_white_paper.pdf
[dev-mailing-list-url]: http://eepurl.com/dx4cPf
[](https://circleci.com/gh/0xProject/0x-monorepo)
[](https://coveralls.io/github/0xProject/0x-monorepo?branch=development)
[](https://chat.0xproject.com)
[](https://gitter.im/0xProject/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
[](https://opensource.org/licenses/Apache-2.0)
### Published Packages
| Package | Version | Description |
| -------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------ |
| [`0x.js`](/packages/0x.js) | [](https://www.npmjs.com/package/0x.js) | A Javascript library for interacting with the 0x protocol |
| [`@0x/abi-gen`](/packages/abi-gen) | [](https://www.npmjs.com/package/@0x/abi-gen) | Tool to generate TS wrappers from smart contract ABIs |
| [`@0x/abi-gen-wrappers`](/packages/abi-gen-wrappers) | [](https://www.npmjs.com/package/@0x/abi-gen-wrappers) | Low-level 0x smart contract wrappers generated using @0x/abi-gen |
| [`@0x/assert`](/packages/assert) | [](https://www.npmjs.com/package/@0x/assert) | Type and schema assertions used by our packages |
| [`@0x/asset-buyer`](/packages/asset-buyer) | [](https://www.npmjs.com/package/@0x/asset-buyer) | Convenience package for discovering and buying assets with Ether |
| [`@0x/base-contract`](/packages/base-contract) | [](https://www.npmjs.com/package/@0x/base-contract) | BaseContract used by auto-generated `abi-gen` wrapper contracts |
| [`@0x/connect`](/packages/connect) | [](https://www.npmjs.com/package/@0x/connect) | A Javascript library for interacting with the Standard Relayer API |
| [`@0x/contract-addresses`](/packages/contract-addresses) | [](https://www.npmjs.com/package/@0x/contract-addresses) | Used to get known addresses of deployed 0x contracts |
| [`@0x/contract-artifacts`](/packages/contract-artifacts) | [](https://www.npmjs.com/package/@0x/contract-artifacts) | 0x smart contract compilation artifacts |
| [`@0x/contract-wrappers`](/packages/contract-wrappers) | [](https://www.npmjs.com/package/@0x/contract-wrappers) | Smart TS wrappers for 0x smart contracts |
| [`@0x/dev-utils`](/packages/dev-utils) | [](https://www.npmjs.com/package/@0x/dev-utils) | Dev utils to be shared across 0x projects and packages |
| [`@0x/fill-scenarios`](/packages/fill-scenarios) | [](https://www.npmjs.com/package/@0x/fill-scenarios) | 0x order fill scenario generation |
| [`@0x/json-schemas`](/packages/json-schemas) | [](https://www.npmjs.com/package/@0x/json-schemas) | 0x-related json schemas |
| [`@0x/migrations`](/packages/migrations) | [](https://www.npmjs.com/package/@0x/migrations) | 0x smart contract migrations |
| [`@0x/order-utils`](/packages/order-utils) | [](https://www.npmjs.com/package/@0x/order-utils) | A set of utilities for generating, parsing, signing and validating 0x orders |
| [`@0x/order-watcher`](/packages/order-watcher) | [](https://www.npmjs.com/package/@0x/order-watcher) | An order watcher daemon that watches for order validity |
| [`@0x/react-docs`](/packages/react-docs) | [](https://www.npmjs.com/package/@0x/react-docs) | React documentation component for rendering TypeDoc & Doxity generated JSON |
| [`@0x/react-shared`](/packages/react-shared) | [](https://www.npmjs.com/package/@0x/react-shared) | 0x shared react components |
| [`@0x/sol-compiler`](/packages/sol-compiler) | [](https://www.npmjs.com/package/@0x/sol-compiler) | A thin wrapper around Solc.js that outputs artifacts, resolves imports, only re-compiles when needed, and other niceties |
| [`@0x/sol-cov`](/packages/sol-cov) | [](https://www.npmjs.com/package/@0x/sol-cov) | Solidity test coverage tool |
| [`@0x/sol-doc`](/packages/sol-doc) | [](https://www.npmjs.com/package/@0x/sol-doc) | Solidity documentation generator |
| [`@0x/sol-resolver`](/packages/sol-resolver) | [](https://www.npmjs.com/package/@0x/sol-resolver) | Import resolver for smart contracts dependencies |
| [`@0x/sra-spec`](/packages/sra-spec) | [](https://www.npmjs.com/package/@0x/sra-spec) | OpenAPI specification for the standard relayer API |
| [`@0x/subproviders`](/packages/subproviders) | [](https://www.npmjs.com/package/@0x/subproviders) | Useful web3 subproviders (e.g. LedgerSubprovider) |
| [`@0x/tslint-config`](/packages/tslint-config) | [](https://www.npmjs.com/package/@0x/tslint-config) | Custom 0x development TSLint rules |
| [`@0x/types`](/packages/types) | [](https://www.npmjs.com/package/@0x/types) | Shared type declarations |
| [`@0x/typescript-typings`](/packages/typescript-typings) | [](https://www.npmjs.com/package/@0x/typescript-typings) | Repository of types for external packages |
| [`@0x/utils`](/packages/utils) | [](https://www.npmjs.com/package/@0x/utils) | Shared utilities |
| [`@0x/web3-wrapper`](/packages/web3-wrapper) | [](https://www.npmjs.com/package/@0x/web3-wrapper) | Web3 wrapper |
### Private Packages
| Package | Description |
| -------------------------------------------------------- | ---------------------------------------------------------------- |
| [`@0x/contracts`](/packages/contracts) | 0x solidity smart contracts & tests |
| [`@0x/react-docs-example`](/packages/react-docs-example) | Example documentation site created with `@0x/react-docs` |
| [`@0x/testnet-faucets`](/packages/testnet-faucets) | A faucet micro-service that dispenses test ERC20 tokens or Ether |
| [`@0x/website`](/packages/website) | 0x website & Portal DApp |
## Usage
Dedicated documentation pages:
* [0x.js Library](https://0xproject.com/docs/0xjs)
* [0x Connect](https://0xproject.com/docs/connect)
* [Smart contracts](https://0xproject.com/docs/contracts)
* [Subproviders](https://0xproject.com/docs/subproviders)
* [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 the `@0x/typescript-typings` package to your [`typeRoots`](http://www.typescriptlang.org/docs/handbook/tsconfig-json.html) config.
```json
"typeRoots": ["node_modules/@0x/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.
#### Read our [contribution guidelines](./CONTRIBUTING.md).
### Install dependencies
Make sure you are using Yarn v1.9.4. To install using brew:
```bash
brew install yarn@1.9.4
```
Then install dependencies
```bash
yarn install
```
### Build
To build all packages:
```bash
yarn build
```
To build a specific package:
```bash
PKG=@0x/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=@0x/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:
```bash
yarn lint
```
Lint a specific package:
```bash
PKG=0x.js yarn lint
```
### Run Tests
Run all tests:
```bash
yarn test
```
Run a specific package's test:
```bash
PKG=@0x/web3-wrapper yarn test
```
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