<img src="https://github.com/0xProject/branding/blob/master/0x%20Logo/PNG/0x-Logo-Black.png" width="150px"
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⚠️ Deprecation Warning ️️⚠️
This project is deprecated and no longer maintained, refer to 0xProject/protocol and 0xProject/tools instead.
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[0x][website-url] 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.
[website-url]: https://0x.org
Packages
Visit our developer portal for a comprehensive list of core & community maintained packages. All packages maintained with this monorepo are listed below.
Python Packages
| Package | Version | Description | | -------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- | | 0x-contract-addresses | [](https://pypi.org/project/0x-contract-addresses/) | A tiny utility library for getting known deployed contract addresses for a particular network | | 0x-contract-artifacts | [](https://pypi.org/project/0x-contract-artifacts/) | 0x smart contract compilation artifacts | | 0x-contract-wrappers | [](https://pypi.org/project/0x-contract-wrappers/) | 0x smart contract wrappers | | 0x-json-schemas | [](https://pypi.org/project/0x-json-schemas/) | 0x-related JSON schemas | | 0x-order-utils | [](https://pypi.org/project/0x-order-utils/) | A set of utilities for generating, parsing, signing and validating 0x orders | | 0x-sra-client | [](https://pypi.org/project/0x-sra-client/) | A Python client for interacting with servers conforming to the Standard Relayer API specification |
Solidity Packages
These packages are all under development. See /contracts/README.md for a list of deployed packages.
| Package | Version | Description | | ------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | @0x/contracts-asset-proxy | [](https://www.npmjs.com/package/@0x/contracts-asset-proxy) | AssetProxy contracts used within the protocol | | @0x/contracts-erc20 | [](https://www.npmjs.com/package/@0x/contracts-erc20) | Implementations of various ERC20 tokens | | @0x/contracts-erc721 | [](https://www.npmjs.com/package/@0x/contracts-erc721) | Implementations of various ERC721 tokens | | @0x/contracts-erc1155 | [](https://www.npmjs.com/package/@0x/contracts-erc1155) | Implementations of various ERC1155 tokens | | @0x/contracts-exchange | [](https://www.npmjs.com/package/@0x/contracts-exchange) | The Exchange contract used for settling trades within the protocol | | @0x/contracts-exchange-forwarder | [](https://www.npmjs.com/package/@0x/contracts-exchange-forwarder) | A Forwarder contract used to simplify UX for interacting with the protocol | | @0x/contracts-exchange-libs | [](https://www.npmjs.com/package/@0x/contracts-exchange-libs) | Protocol specific libraries used within the Exchange contract | | @0x/contracts-extensions | [](https://www.npmjs.com/package/@0x/contracts-extensions) | Contracts that interact with and extend the functionality of the core protocol | | @0x/contracts-multisig | [](https://www.npmjs.com/package/@0x/contracts-multisig) | Various implementations of multisignature wallets, including the AssetProxyOwner contract that has permissions to upgrade the protocol | | @0x/contracts-test-utils | [](https://www.npmjs.com/package/@0x/contracts-test-utils) | TypeScript/Javascript shared utilities used for testing contracts | | @0x/contracts-utils | [](https://www.npmjs.com/package/@0x/contracts-utils) | Generic libraries and utilities used throughout all of the contracts | | @0x/contracts-coordinator | [](https://www.npmjs.com/package/@0x/contracts-coordinator) | A contract that allows users to execute 0x transactions with permission from a Coordinator | | @0x/contracts-dev-utils | [](https://www.npmjs.com/package/@0x/contracts-dev-utils) | A contract contains utility functions for developers (such as validating many orders using a single ethcall) | | @0x/contracts-staking | [](https://www.npmjs.com/package/@0x/contracts-staking) | Implements the stake-based liquidity incentives defined by ZEIP-31 |
TypeScript/Javascript Packages
#### 0x-specific packages
| Package | Version | Description | | -------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- | | 0x.js | [](https://www.npmjs.com/package/0x.js) | An aggregate package combining many smaller utility packages for interacting with the 0x protocol | | @0x/contract-addresses | [](https://www.npmjs.com/package/@0x/contract-addresses) | A tiny utility library for getting known deployed contract addresses for a particular network. | | @0x/contract-wrappers | [](https://www.npmjs.com/package/@0x/contract-wrappers) | JS/TS wrappers for interacting with the 0x smart contracts | | @0x/order-utils | [](https://www.npmjs.com/package/@0x/order-utils) | A set of utilities for generating, parsing, signing and validating 0x orders | | @0x/json-schemas | [](https://www.npmjs.com/package/@0x/json-schemas) | 0x-related JSON schemas | | | @0x/migrations | [](https://www.npmjs.com/package/@0x/migrations) | Migration tool for deploying 0x smart contracts on private testnets | | @0x/contract-artifacts | [](https://www.npmjs.com/package/@0x/contract-artifacts) | 0x smart contract compilation artifacts | | | @0x/sra-spec | [](https://www.npmjs.com/package/@0x/sra-spec) | OpenAPI specification for the Standard Relayer API | | @0x/connect | [](https://www.npmjs.com/package/@0x/connect) | An HTTP/WS client for interacting with the Standard Relayer API | | @0x/asset-swapper | [](https://www.npmjs.com/package/@0x/asset-swapper) | Convenience package for discovering and performing swaps for any ERC20 Assets |