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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.

Package	Version	Description
@0x/web3-wrapper		An Ethereum JSON RPC client
@0x/sol-compiler		A wrapper around solc-js that adds smart re-compilation, ability to compile an entire project, Solidity version specific compilation, standard input description support and much more.
@0x/sol-coverage		A solidity test coverage tool
@0x/sol-profiler		A solidity gas cost profiler
@0x/sol-trace		A solidity stack trace tool
@0x/sol-resolver		Import resolver for smart contracts dependencies
@0x/subproviders		Web3 provider middlewares (e.g. LedgerSubprovider)
@0x/sol-doc		Solidity documentation generator

Package	Version	Description
@0x/abi-gen		Tool to generate TS wrappers from smart contract ABIs
@0x/tslint-config		Custom TSLint rules used by the 0x core team
@0x/types		Shared type declarations
@0x/typescript-typings		Repository of types for external packages
@0x/utils		Shared utilities
@0x/assert		Type and schema assertions used by our packages
@0x/base-contract		BaseContract used by auto-generated abi-gen wrapper contracts
@0x/dev-utils		Dev utils to be shared across 0x packages

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 [email protected]

Then install dependencies

yarn install

You will also need to have Python 3 installed, in order to build and run the tests of abi-gen's command-line interface, which is integrated with the yarn build, yarn test, and yarn lint commands described below. More specifically, your local pip should resolve to the Python 3 version of pip, not a Python 2.x version.

To build all packages:

yarn build

To build a specific package:

PKG=@0x/web3-wrapper 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/web3-wrapper yarn watch

Clean all packages:

yarn clean

Clean a specific package

PKG=0x.js yarn clean

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

yarn rebuild

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

PKG=0x.js yarn rebuild

Lint all packages:

yarn lint

Lint a specific package:

PKG=0x.js yarn lint

Run all tests:

yarn test

Run a specific package's test:

PKG=@0x/web3-wrapper yarn test

Run all contracts packages tests:

yarn test:contracts