27.1 Release Notes

Bitcoin Knots version 27.1.knots20240801 is now available from:

https://bitcoinknots.org/files/27.x/27.1.knots20240801/

This release includes new features, various bug fixes, and performance improvements.

Please report bugs using the issue tracker at GitHub:

https://github.com/bitcoinknots/bitcoin/issues

To receive security and update notifications, please subscribe to:

https://bitcoinknots.org/list/announcements/join/

How to Upgrade

If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes in some cases), then run the installer (on Windows) or just copy over /Applications/Bitcoin-Qt (on macOS) or bitcoind/bitcoin-qt (on Linux).

Upgrading directly from very old versions of Bitcoin Core or Knots is possible, but it might take some time if the data directory needs to be migrated. Old wallet versions of Bitcoin Knots are generally supported.

Compatibility

Bitcoin Knots is supported on operating systems using the Linux kernel, macOS 11.0+, and Windows 7 and newer. It is not recommended to use Bitcoin Knots on unsupported systems.

Known Bugs

In various locations, including the GUI's transaction details dialog and the "vsize" result in many RPC results, transaction virtual sizes may not account for an unusually high number of sigops (ie, as determined by the -bytespersigop policy) or datacarrier penalties (ie, -datacarriercost). This could result in reporting a lower virtual size than is actually used for mempool or mining purposes.

Due to disruption of the shared Bitcoin Transifex repository, this release still does not include updated translations, and Bitcoin Knots may be unable to do so until/unless that is resolved.

Notable changes

P2P and network changes

• The prior release re-enabled UPnP and NAT-PMP by default based on the understanding that it had been many years since the libraries for these had a vulnerability. It turns out, this is not the case, and out of an abundance of caution, it has been reverted back to disabled-by-default. If you can manually forward the p2p port to your node, that is recommended.

Updated RPCs

• The sendall RPC now attempts to include more of the wallet's balance in cases where other transactions were recently sent and have not yet confirmed. (bitcoin#28979)

• UTXOs returned by scantxoutset now include the blockhash (the transaction creating the UTXO was confirmed in), as well as the number of confirmations. (bitcoin#30515)

Updated REST APIs

• Parameter validation for /rest/getutxos has been improved by rejecting truncated or overly large txids and malformed outpoint indices by raising an HTTP_BAD_REQUEST "Parse error". Previously, these malformed requests would be
  silently handled. (bitcoin#30482, bitcoin#30444)