OpenZeppelin can be installed directly into your existing node.js project with `npm install --save-exact openzeppelin-solidity`, but OpenZeppelin also integrates directly with [Truffle](https://github.com/ConsenSys/truffle), an Ethereum development environment, which we'll use to get started.
OpenZeppelin can be installed directly into your existing node.js project with `npm install openzeppelin-solidity`. We will use [Truffle](https://github.com/ConsenSys/truffle), an Ethereum development environment, to get started.
Please install Truffle and initialize your project:
```sh
$ npm install -g truffle
$ mkdir myproject &&cd myproject
$ truffle init
$ mkdir myproject
$ cd myproject
$ npm install truffle
$ npx truffle init
```
To install the OpenZeppelin library, run the following in your Solidity project root directory:
```sh
$ npm init -y
$ npm install --save-exact openzeppelin-solidity
$ npm install openzeppelin-solidity
```
**Note that OpenZeppelin only lightly follows semantic versioning.** You may encounter breaking changes upon a minor version bump. We recommend pinning the version of OpenZeppelin you use by using the `--save-exact` option.
After that, you'll get all the library's contracts in the `node_modules/openzeppelin-solidity/contracts` folder. Because Truffle and other Ethereum development toolkits understand `node_modules`, you can use the contracts in the library like so:
```js
...
...
@@ -35,12 +33,12 @@ contract MyContract is Ownable {
After installing OpenZeppelin, check out the rest of the guides in the sidebar to learn about the different contracts that OpenZeppelin provides and how to use them.
-[Learn About Access Control](/api/docs/learn-about-access-control.html)
-[Learn About Crowdsales](/api/docs/learn-about-crowdsales.html)
-[Learn About Tokens](/api/docs/learn-about-tokens.html)
-[Learn About Utilities](/api/docs/learn-about-utilities.html)
-[Learn About Access Control](learn-about-access-control)
-[Learn About Crowdsales](learn-about-crowdsales)
-[Learn About Tokens](learn-about-tokens)
-[Learn About Utilities](learn-about-utilities)
You may also want to take a look at the guides which cover several common use cases and good practices: https://blog.zeppelin.solutions/guides/home
You may also want to take a look at the guides on our blog, which cover several common use cases and good practices: https://blog.zeppelin.solutions/guides/home.
For example, [The Hitchhiker’s Guide to Smart Contracts in Ethereum](https://blog.zeppelin.solutions/the-hitchhikers-guide-to-smart-contracts-in-ethereum-848f08001f05) will help you get an overview of the various tools available for smart contract development, and help you set up your environment.
