0x is an open protocol that facilitates trustless, low friction exchange of Ethereum-based assets. For more information on how it works, check out the 0x protocol specification.

This repository is a monorepo including the 0x protocol smart contracts and numerous developer tools. Each public sub-package is independently published to NPM.

Visit our developer portal for a comprehensive list of core & community maintained packages. All packages maintained with this monorepo are listed below.

These packages are all under development. See /contracts/README.md for a list of deployed packages.

Package	Version	Description
@0x/contracts-zero-ex		The contracts used for settling trades within the protocol
@0x/contracts-erc20		Implementations of various ERC20 tokens
@0x/contracts-test-utils		TypeScript/Javascript shared utilities used for testing contracts
@0x/contracts-utils		Generic libraries and utilities used throughout all of the contracts

Package	Version	Description
@0x/protocol-utils		A set of utilities for generating, parsing, signing and validating 0x orders
@0x/contract-addresses		A tiny utility library for getting known deployed contract addresses for a particular network.
@0x/contract-wrappers		JS/TS wrappers for interacting with the 0x smart contracts
@0x/contract-artifacts		0x smart contract compilation artifacts

Node version 6.x or 8.x 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 config.

"typeRoots": ["node_modules/@0x/typescript-typings/types", "node_modules/@types"],

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.

Make sure you are using Yarn v1.9.4. To install using brew:

brew install yarn@1.9.4

Then install dependencies

yarn install

To build all packages:

yarn build

To build a specific package:

PKG=@0x/protocol-utils yarn build

To build all contracts packages:

yarn build:contracts

To re-build all packages on change:

yarn watch

To watch a specific package and all it's dependent packages:

PKG=[NPM_PACKAGE_NAME] yarn watch

e.g
PKG=@0x/protocol-utils yarn watch

Clean all packages:

yarn clean

Clean a specific package

PKG=@0x/protocol-utils yarn clean

To re-build (clean & build) all packages:

yarn rebuild

To re-build (clean & build) a specific package & it's deps:

PKG=@0x/protocol-utils yarn rebuild

Lint all packages:

yarn lint

Lint a specific package:

PKG=@0x/protocol-utils yarn lint

Run all tests:

yarn test

Run a specific package's test:

PKG=@0x/protocol-utils yarn test

Run all contracts packages tests:

yarn test:contracts