Geth v1.10.20 is a maintenance release, adding built-in configuration for the merge fork on the Sepolia testnet.

Specifically, this release defines a terminal total difficulty for Sepolia (#25179).

Geth command changes

• Geth and most other command-line tools now use a newer version of the command-line argument/flag handling library. There is one new restriction with this change: flags must now be given before other arguments. Very few of Geth's subcommands take arguments, so this is unlikely to cause issues. (#24751)
• The geth js subcommand has been removed. (#25000)
• The new --discovery.port flag allows configuring a separate port for the UDP listener. (#24979)
• Setting p2p bootstrap nodes in the config file now works even when a pre-defined network is selected on the command-line. (#25174)

RPC API changes

• eth_chainId now always returns the configured chain ID regardless of sync status. This is a violation of EIP-695, but the previous behavior caused issues with CL clients. (#25166, #25168)
• Transaction objects returned by RPC (e.g. from eth_getTransactionByHash) now always include the chainId field, even for untyped (legacy) transactions. (#25155)
• The deprecated RPC method personal_signAndSendTransaction has been removed. (#25111)
• Handling of certain reorg corner cases is improved in the Engine API. (#25187, #25139)
• A performance regression in JS tracing is resolved. (#25156)

Build changes

• Bash and zsh completions are now installed by the geth Ubuntu package. (#25195, #25204)

For a full rundown of the changes please consult the Geth 1.10.20 release milestone

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.