OpenZeppelin EVM Package

OpenZeppelin is a library for secure smart contract development. It provides implementations of standards like ERC20 and ERC721 which you can deploy as-is or extend to suit your needs, as well as Solidity components to build custom contracts and more complex decentralized systems.

This fork of OpenZeppelin is set up as a reusable EVM Package. It is deployed to the kovan, rinkeby, and ropsten test networks, as well as to the main Ethereum network. You can reuse any of the pre-deployed on-chain contracts by simply linking to them using ZeppelinOS, or reuse their Solidity source code as with the vanilla version of OpenZeppelin.

Install

npm install openzeppelin-eth

Usage

To write your custom contracts, import ours and extend them through inheritance.

pragma solidity ^0.5.0;

import 'zos-lib/contracts/Initializable.sol';
import 'openzeppelin-eth/contracts/token/ERC721/ERC721Full.sol';
import 'openzeppelin-eth/contracts/token/ERC721/ERC721Mintable.sol';

contract MyNFT is Initializable, ERC721Full, ERC721Mintable {
  function initialize() public initializer {
    ERC721.initialize();
    ERC721Enumerable.initialize();
    ERC721Metadata.initialize("MyNFT", "MNFT");
    ERC721Mintable.initialize(msg.sender);
  }
}

Pre-deployed contracts

• StandaloneERC20
• StandaloneERC721
• TokenVesting
• PaymentSplitter

License

OpenZeppelin is released under the MIT License.