25.10.0-RC1
Important
This RC is an optional update for Holesky and Sepolia users. 25.9.0 remains the official Fusaka Testnet release.
You only need to upgrade to this release if you're experiencing the eth_subscribe or ethstats known issue from 25.9.0.
This RC is still pending burn in for mainnet.
Fusaka Hardfork details: https://eips.ethereum.org/EIPS/eip-7607#activation
- Holešky scheduled to fork on 2025-10-01 08:48:00
- Sepolia scheduled to fork on 2025-10-14 07:36:00
- Hoodi scheduled to fork on 2025-10-28 18:53:12
Breaking Changes
Upcoming Breaking Changes
- Deprecated CLI options
--Xbonsai-parallel-tx-processing-enabledis deprecated since 25.7.0. Use--bonsai-parallel-tx-processing-enabledinstead.--Xsnapsync-server-enabledis deprecated since 25.7.0. Use--snapsync-server-enabledinstead.--Xsnapsync-synchronizer-pre-merge-headers-only-enabledis deprecated since 25.7.0. Use--snapsync-synchronizer-pre-checkpoint-headers-only-enabledinstead.--Xhistory-expiry-pruneis deprecated since 25.7.0. Use--history-expiry-pruneinstead.
- Sunsetting features - for more context on the reasoning behind the deprecation of these features, including alternative options, read this blog post
- Proof of Work consensus (PoW)
- Fast Sync
Additions and Improvements
- Update spring security framework (toml parsing) #9153
- Update grpc and guava #9150
- Implement optional sender balance checks in the layered txpool #9176
- Add
--cache-last-block-headersflag to cache the last n block headers persisted to the blockchain #9223 - Manage unexpected exceptions during block creation #9208
- Upgrade to execution-spec-tests v5.2.0 #9226, #9242
Bug fixes
- Fix eth_subscribe RPC failing to return a block response #9212
- Fix ethstats integration failing to provide block updates to ethstats server #9220
Full Changelog: 25.9.0...25.10.0-RC1
f0390f431612771485a68e4e9e2e177f35243aacc2eec91d4cc00e4f25cf5df1 besu-25.10.0-RC1.zip
9e62ffe9722ea1e20913d1428db0e4039c070298876857528b78e23e8ef1d7b6 besu-25.10.0-RC1.tar.gz