---
title: WatchDog Bot
description: EURO3 price stabilization bot
section: 3A Protocol
order: 114
---

<!-- archive-notice -->
> **Archived.** The 3A lending protocol and EURO3 on Linea and Polygon were phased out in 2024: no new loans from
> 1 October 2024, and all remaining vaults closed on 30 November 2024
> ([3A DAO's announcement](https://medium.com/@3aDAO/phasing-out-euro3-lending-f5869a3498a8)). This page is kept
> for reference and describes the protocol as it was. Do not send funds to the contracts it lists.

The bot runs automatically to adjust the HF for Redemptions based on EURO3 under peg deviation from  EURO/USD price.

If EURO3 is within 2% away from the peg then the HF is set to 1.1.

If the EURO3 price is more than 2% under pegged then the HF for Redemptions is increased by 0.5 every check till max HF is reached. Once the EURO3 price reaches the peg within 2% deviation, the HF gets set back to 1.1.