# v1 Protocol Spec

In this section, you'll find Ethereum Natspec documentation for each of the contracts, events, errors, and interfaces that comprise Hats Protocol.

{% content-ref url="v1-protocol-spec/hats.sol" %}
[hats.sol](https://docs.hatsprotocol.xyz/for-developers/v1-protocol-spec/hats.sol)
{% endcontent-ref %}

{% content-ref url="v1-protocol-spec/hatsevents.sol" %}
[hatsevents.sol](https://docs.hatsprotocol.xyz/for-developers/v1-protocol-spec/hatsevents.sol)
{% endcontent-ref %}

{% content-ref url="v1-protocol-spec/hatserrors.sol" %}
[hatserrors.sol](https://docs.hatsprotocol.xyz/for-developers/v1-protocol-spec/hatserrors.sol)
{% endcontent-ref %}

{% content-ref url="v1-protocol-spec/hatsidutilities.sol" %}
[hatsidutilities.sol](https://docs.hatsprotocol.xyz/for-developers/v1-protocol-spec/hatsidutilities.sol)
{% endcontent-ref %}

{% content-ref url="v1-protocol-spec/interfaces" %}
[interfaces](https://docs.hatsprotocol.xyz/for-developers/v1-protocol-spec/interfaces)
{% endcontent-ref %}