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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.
[website-url]: https://0xproject.com/
[whitepaper-url]: https://0xproject.com/pdfs/0x_white_paper.pdf
[](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)
[](https://greenkeeper.io/)
### 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 |
| [`@0xproject/abi-gen`](/packages/abi-gen) | [](https://www.npmjs.com/package/@0xproject/abi-gen) | Tool to generate TS wrappers from smart contract ABIs |
| [`@0xproject/assert`](/packages/assert) | [](https://www.npmjs.com/package/@0xproject/assert) | Type and schema assertions used by our packages |
| [`@0xproject/base-contract`](/packages/base-contract) | [](https://www.npmjs.com/package/@0xproject/base-contract) | BaseContract used by auto-generated `abi-gen` wrapper contracts |
| [`@0xproject/connect`](/packages/connect) | [](https://www.npmjs.com/package/@0xproject/connect) | A Javascript library for interacting with the Standard Relayer API |
| [`@0xproject/deployer`](/packages/deployer) | [](https://www.npmjs.com/package/@0xproject/deployer) | Solidity project compiler and deployer framework |
| [`@0xproject/dev-utils`](/packages/dev-utils) | [](https://www.npmjs.com/package/@0xproject/dev-utils) | Dev utils to be shared across 0x projects and packages |
| [`@0xproject/json-schemas`](/packages/json-schemas) | [](https://www.npmjs.com/package/@0xproject/json-schemas) | 0x-related json schemas |
| [`@0xproject/monorepo-scripts`](/packages/monorepo-scripts) | [](https://www.npmjs.com/package/@0xproject/monorepo-scripts) | Monorepo scripts |
| [`@0xproject/react-docs`](/packages/react-docs) | [](https://www.npmjs.com/package/@0xproject/react-docs) | React documentation component for rendering TypeDoc & Doxity generated JSON |
| [`@0xproject/react-shared`](/packages/react-shared) | [](https://www.npmjs.com/package/@0xproject/react-shared) | 0x shared react components |
| [`@0xproject/sra-report`](/packages/sra-report) | [](https://www.npmjs.com/package/@0xproject/sra-report) | Generate reports for standard relayer API compliance |
| [`@0xproject/sol-cov`](/packages/sol-cov) | [](https://www.npmjs.com/package/@0xproject/sol-cov) | Solidity test coverage tool tool |
| [`@0xproject/subproviders`](/packages/subproviders) | [](https://www.npmjs.com/package/@0xproject/subproviders) | Useful web3 subproviders (e.g LedgerSubprovider) |
| [`@0xproject/tslint-config`](/packages/tslint-config) | [](https://www.npmjs.com/package/@0xproject/tslint-config) | Custom 0x development TSLint rules |
| [`@0xproject/types`](/packages/types) | [](https://www.npmjs.com/package/@0xproject/types) | Shared type declarations |
| [`@0xproject/utils`](/packages/utils) | [](https://www.npmjs.com/package/@0xproject/utils) | Shared utilities |
| [`@0xproject/web3-wrapper`](/packages/web3-wrapper) | [](https://www.npmjs.com/package/@0xproject/web3-wrapper) | Web3 wrapper |
### TypeScript Typings
| Package | Version | Description |
| -------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------- |
| [`chai-as-promised-typescript-typings`](/packages/chai-as-promised-typescript-typings) | [](https://www.npmjs.com/package/chai-as-promised-typescript-typings) | Chai as promised typescript typings |
| [`chai-typescript-typings`](/packages/chai-typescript-typings) | [](https://www.npmjs.com/package/chai-typescript-typings) | Chai typescript typings |
| [`ethers-typescript-typings`](/packages/ethers-typescript-typings) | [](https://www.npmjs.com/package/ethers-typescript-typings) | [Ethers.js](https://github.com/ethers-io/ethers.js/) typescript typings |
| [`web3-typescript-typings`](/packages/web3-typescript-typings) | [](https://www.npmjs.com/package/web3-typescript-typings) | Web3 typescript typings |
### Private Packages
| Package | Description |
| --------------------------------------------------------------- | ---------------------------------------------------------------- |
| [`@0xproject/contracts`](/packages/contracts) | 0x solidity smart contracts & tests |
| [`@0xproject/react-docs-example`](/packages/react-docs-example) | Example documentation site created with `@0xproject/react-docs` |
| [`@0xproject/testnet-faucets`](/packages/testnet-faucets) | A faucet micro-service that dispenses test ERC20 tokens or Ether |
| [`@0xproject/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)
* [Standard Relayer API](https://github.com/0xProject/standard-relayer-api/blob/master/README.md)
## 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
Build all packages
```bash
yarn lerna:run build
```
Continuously rebuild on exchange
```bash
yarn dev
```
### Lint
Lint all packages
```bash
yarn lerna:run 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)
```bash
yarn testrpc
```
Then in your main terminal run
```
cd packages/contracts
yarn migrate
cd ..
```
And finally from the root project directory run
```bash
yarn lerna:run test
```
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