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.