Bitcoin Core 31.2

Bitcoin Core installation binaries can be downloaded from bitcoincore.org and the source-code is available from the Bitcoin Core source repository.

v31.2 Release Notes

Bitcoin Core version 31.2 is now available from:

https://bitcoincore.org/bin/bitcoin-core-31.2/

This release includes various bug fixes and performance improvements, as well as updated translations.

Please report bugs using the issue tracker at GitHub:

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

To receive security and update notifications, please subscribe to:

https://bitcoincore.org/en/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 bin/ and libexec/ (on Linux).

Upgrading directly from a version of Bitcoin Core that has reached its EOL is possible, but it might take some time if the data directory needs to be migrated. Old wallet versions of Bitcoin Core are generally supported.

Compatibility

Bitcoin Core is supported and tested on the following operating systems or newer: Linux Kernel 3.17, macOS 14, and Windows 10 (version 1903). Bitcoin Core should also work on most other Unix-like systems but is not as frequently tested on them. It is not recommended to use Bitcoin Core on unsupported systems.

Notable changes

  • BIP 9 bits 5 to 28 inclusive are now ignored for soft fork signaling, as per BIP 323. We won’t warn about unknown deployments when receiving blocks that set any of those bits in their version. (#34779)

  • The private-broadcast queue (transactions submitted via sendrawtransaction when -privatebroadcast is enabled and not yet echoed back from the network) is now capped at 10,000 entries. When full, new submissions are rejected. It is up to the caller to inspect the queue via getprivatebroadcastinfo and free up space when stuck via abortprivatebroadcast. (#35406)

Versionbits

  • #34779 BIP 323: reserve version bits 5-28 as extra nonce space

Validation

  • #35168 validation: Don’t add pruned blocks to m_blocks_unlinked on startup

Private Broadcast

  • #36309 private broadcast: clarify claims, mark as experimental

P2P

  • #34873 net: fix premature stale flagging of unpicked private broadcast txs
  • #35406 private broadcast: limit outstanding txs to count of 10,000
  • #35678 private broadcast: define and use new RPC_LIMIT_EXCEEDED error code
  • #35691 chainparams: delete my DNS seed
  • #35766 p2p: Assume v2transport for addresses from seeds
  • #36312 net: don’t discourage private broadcast peers

Net

  • #36177 net: fix startup failures from stale Tor examples
  • #36199 net: treat RFC 9637 new IPv6 documentation range as invalid
  • #36201 Update embedded asmap to 1788801420
  • #36665 sock: align exception monitoring between poll() and select() backends
  • #36667 net: enforce timeout interval for paused send peers

Util

  • #36669 refactor: store positions as a 64 bits integer in flatfiles

Test

  • #35914 test, fuzz: Remove unused variables
  • #35937 test: Append print_suppressions=0 to LSAN_OPTIONS, and suppress bitcoin-qt
  • #36045 test: avoid undersized Boost.Test signal stacks
  • #36599 test: Fix intermittent timeout waiting for ibd_wtxid getdata

Fuzz

  • #35679 fuzz: Remove unused DeserializeFromFuzzingInput params overload

Build

  • #35769 depends, zeromq: Apply upstream patch
  • #36218 build: avoid pipe2 on Darwin (for now)

Doc

  • #35908 doc: Update NetBSD Build Guide
  • #35928 doc: mention -DWITH_ZMQ=ON in macOS build guide
  • #36377 doc: add 461 (Deterministic ECDSA signatures with low-R grinding) to bips.md
  • #36441 doc: fix How to Upgrade section for bitcoin wrapper and libexec

Misc

  • #35978 contrib/init: fix unused variables in openrc script

Credits

Thanks to everyone who directly contributed to this release:

  • ajtowns
  • Andrew Toth
  • cyb3ralbert
  • darosior
  • fanquake
  • fjahr
  • Greg Sanders
  • hebasto
  • hodlinator
  • jpk68
  • Lőrinc
  • MarcoFalke
  • marcofleon
  • Martin Zumsande
  • Mccalabrese
  • Sebastian Falbesoner
  • sipa
  • spidey279
  • stickies-v

As well as to everyone that helped with translations on Transifex.

Bitcoin Core 31.2 was published on .