Get Started

OpenZeppelin integrates with Truffle, an Ethereum development environment. Please install Truffle and initialize your project with truffle init.

npm install -g truffle
mkdir myproject && cd myproject
truffle init

To install the OpenZeppelin library, run the following in your Solidity project root directory:

npm init -y
npm install -E zeppelin-solidity

Note that OpenZeppelin does not currently follow semantic versioning. You may encounter breaking changes upon a minor version bump. We recommend pinning the version of OpenZeppelin you use, as done by the -E (--save-exact) option.

After that, you'll get all the library's contracts in the node_modules/zeppelin-solidity/contracts folder. You can use the contracts in the library like so:

import 'zeppelin-solidity/contracts/ownership/Ownable.sol';

contract MyContract is Ownable {
  ...
}