This is a bug-fix release with some performance improvements.

Geth

• geth import now applies database and cache flags correctly. (#31577, #31534)
• The new log indexer now exports metrics about its operation. (#31511)
• The beacon chain light client, blsync now has a feature to export checkpoint files. (#31469)

Core library

• Database writes have been made fully synchronous again. We disabled the use of fsync a while ago to improve performance on slow filesystems, but it has lead to reports of instability. The performance hit from enabling data sync is negligible. (#31519)
• The transaction pool now takes pending blob transactions into account when limiting pending EIP-7702 authorizations for an account. (#31526)
• A logic race in EIP-7702 transaction validation is resolved. (#31373)
• The blob transaction pool performs less disk reads when sending transaction announcements. (#31433)
• The EVM now has a special fast-path for PUSH2, which is the most common instruction. (#31267)
• The Trezor hardware wallet implementation now supports 32-bit chain IDs. (#17439)
• Geth can now stop syncing history at the PoS merge point. This behavior is not enabled yet. (#31414)

RPC

• When trying to access pruned history, all RPC APIs now return error code 4444. (#31361)

P2P networking

• UPnP support has been improved and some bugs got fixed. (#30265, #31486, #31566)
• The discv5 'talk request' API has been changed to pass *enode.Node to handlers. This is a breaking change, but the only known user of this API is the shisui portal network client. (#31075)
• A flaw in the recently added discv5 challenge resend logic was fixed. (#31543)
• The eth protocol now properly handles very large skip values when processing GetBlockHeaders messages from peers. This is not a security fix, despite looking like one, it's more about correctness. (#31522)

Build

• This release is built with Go 1.24.2 (#31538)
• Note: due to issues with our build environment, we can no longer provide binary builds for macOS. These may be restored at a later date, hopefully soon. For now, you'll have to install from Homebrew.
• The previous release's git tag, v1.15.7, was published twice, leading to an issue with the Go module cache.

For a full rundown of the changes please consult the Geth 1.15.8 release milestone

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As with all our previous releases, you can find the:

• Pre-built binaries for all platforms on our downloads page.
• Docker images published under ethereum/client-go.
• Ubuntu packages in our Launchpad PPA repository.
• OSX packages in our Homebrew Tap repository.