# Application Binary Interfaces

Depending on what web3 library you're using, you may need to get hold of the contract ABIs (Application Binary Interfaces). There are two ways to obtain them.

## 1. Install Node Package

We provide a node package called [@hifi/protocol](https://www.npmjs.com/package/@hifi/protocol) that contains the ABIs for the contracts deployed on mainnet:

{% embed url="<https://www.npmjs.com/package/@hifi/protocol>" %}

{% hint style="info" %}
Pro tip: use [unpkg.com](https://unpkg.com/browse/@hifi/protocol@1.0.0/) to browse the contents of the package before installing it.
{% endhint %}

## 2. Clone the Repo

Alternatively, you can clone our GitHub [repository](https://github.com/hifi-finance/hifi-protocol) and compile the contracts yourself. The git commit that we used to deploy the contracts is [b06eda9](https://github.com/hifi-finance/hifi-protocol/commit/b06eda91bbbb21f29f5bc3ac238f74763c4d1057), which is also tagged as [v1.0.0](https://github.com/hifi-finance/hifi-protocol/tree/v1.0.0).&#x20;

```bash
$ git clone git@github.com:hifi-finance/hifi-protocol.git
$ cd ./hifi-protocol
$ git checkout v1.0.0

$ yarn install
$ yarn compile
```

You should find the artifacts in the newly created `artifacts/contracts` folder.


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