# What are the legitimate contracts owned & operated by Xai Foundation?

Below is a list of the legitimate and relevant contracts for operating a Xai node:

**nodeLicenseAddress**: 0xbc14d8563b248B79689ECbc43bBa53290e0b6b66

**refereeAddress**: 0xfD41041180571C5D371BEA3D9550E55653671198

**esXaiAddress**: 0x4C749d097832DE2FEcc989ce18fDc5f1BD76700c

**xaiAddress**: 0x4Cb9a7AE498CEDcBb5EAe9f25736aE7d428C9D66

{% hint style="danger" %}
If you interact with any contracts aside from one of the 4 listed above, you should assume it is a scam. You should also inform a member of the Xai staff on Discord or Telegram to make them aware of the scam contract(s).
{% endhint %}

### Glossary:

**nodeLicenseAddress**: This is the node license contract where Sentry Keys are minted. This is the only contract you should interact with when minting Xai Sentry Keys to run a node.

**refereeAddress**: This is the referree contract which creates a new challenge, collects assertions from keyholders, and gives out rewards to participants of a challenge. This is the only contract you should receive esXAI rewards from for operating a node.

**esXaiAddress**: This is the esXAI token contract. Do not accept any esXAI tokens that are not part of this contract.

**xaiAddress**: This is the XAI token contract. Do not accept any XAI tokens that are not part of this contract.