0xPolygon/bor - Bor v2.10.0 - Austin hardfork New

Published: Aug 13, 2026

Release Summary

The Polygon PoS Bor execution client has released version v2.10.0, enabling the Austin hardfork.

This is the public release for the hardfork, which is already active on the network. Activation occurred at the following block heights:

Mainnet: 91,949,700
Amoy Testnet: 44,120,000

This is a consensus-affecting upgrade. The key changes include:

1. A new limit has been introduced on the amount of gas that can be used per block for state-sync operations.

2. The block header format has been updated. The `TxDependency` field is removed from the block's extra-data, and a new structure (BlockExtraDataPostAustin) is now used for encoding and decoding block headers after the hardfork.

Release Notes

Austin hardfork release for the Polygon PoS Bor execution client.

## Activation

| Network | Block |
| --- | --- |
| Amoy | 44,120,000 |
| Mainnet | 91,949,700 |

## What's Changed
* Release v2.10.0 (Austin hardfork) by @kamuikatsurgi in https://github.com/0xPolygon/bor/pull/2360

**Full Changelog**: https://github.com/0xPolygon/bor/compare/v2.9.0...v2.10.0

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