0xPolygon/heimdall-v2 - v0.3.1 New Hotfix

Published: Sep 10, 2025
MAINNET Deadline: Sep 10, 2025
Type: Hotfix

Release Summary

Heimdall v0.3.1 - Mandatory Mainnet Hardfork

This is a critical, mandatory hardfork release for mainnet. All node operators must upgrade.

The hardfork is scheduled for:
Date: September 10th, 2025
Time: Approximately 15:00 UTC
Block Number: 28,525,000

This version contains an important hotfix to address an ongoing issue on the mainnet. The change involves the deletion of a faulty milestone.

Release Notes

This is a hardfork release for mainnet, scheduled for September 10th 2025, at around 15:00 UTC (block number 28525000)
It contains a hot fix for the ongoing mainnet issue.

## What's Changed
* hotfix: milestone deletion by @marcello33 in https://github.com/0xPolygon/heimdall-v2/pull/457


**Full Changelog**: https://github.com/0xPolygon/heimdall-v2/compare/v0.3.0...v0.3.1

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