mirror of
https://github.com/bitcoin/bitcoin.git
synced 2025-01-26 11:13:23 -03:00
217 lines
6.9 KiB
Markdown
217 lines
6.9 KiB
Markdown
Bitcoin Core version 27.0 is now available from:
|
||
|
||
<https://bitcoincore.org/bin/bitcoin-core-27.0/>
|
||
|
||
This release includes new features, 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 `bitcoind`/`bitcoin-qt` (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 extensively tested on operating systems
|
||
using the Linux Kernel 3.17+, macOS 11.0+, and Windows 7 and newer. 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
|
||
===============
|
||
|
||
libbitcoinconsensus
|
||
-------------------
|
||
|
||
- libbitcoinconsensus is deprecated and will be removed for v28. This library has
|
||
existed for nearly 10 years with very little known uptake or impact. It has
|
||
become a maintenance burden.
|
||
|
||
The underlying functionality does not change between versions, so any users of
|
||
the library can continue to use the final release indefinitely, with the
|
||
understanding that Taproot is its final consensus update.
|
||
|
||
In the future, libbitcoinkernel will provide a much more useful API that is
|
||
aware of the UTXO set, and therefore be able to fully validate transactions and
|
||
blocks. (#29189)
|
||
|
||
mempool.dat compatibility
|
||
-------------------------
|
||
|
||
- The `mempool.dat` file created by -persistmempool or the savemempool RPC will
|
||
be written in a new format. This new format includes the XOR'ing of transaction
|
||
contents to mitigate issues where external programs (such as anti-virus) attempt
|
||
to interpret and potentially modify the file.
|
||
|
||
This new format can not be read by previous software releases. To allow for a
|
||
downgrade, a temporary setting `-persistmempoolv1` has been added to fall back
|
||
to the legacy format. (#28207)
|
||
|
||
P2P and network changes
|
||
-----------------------
|
||
|
||
- BIP324 v2 transport is now enabled by default. It remains possible to disable v2
|
||
by running with `-v2transport=0`. (#29347)
|
||
- Manual connection options (`-connect`, `-addnode` and `-seednode`) will
|
||
now follow `-v2transport` to connect with v2 by default. They will retry with
|
||
v1 on failure. (#29058)
|
||
|
||
- Network-adjusted time has been removed from consensus code. It is replaced
|
||
with (unadjusted) system time. The warning for a large median time offset
|
||
(70 minutes or more) is kept. This removes the implicit security assumption of
|
||
requiring an honest majority of outbound peers, and increases the importance
|
||
of the node operator ensuring their system time is (and stays) correct to not
|
||
fall out of consensus with the network. (#28956)
|
||
|
||
Mempool Policy Changes
|
||
----------------------
|
||
|
||
- Opt-in Topologically Restricted Until Confirmation (TRUC) Transactions policy
|
||
(aka v3 transaction policy) is available for use on test networks when
|
||
`-acceptnonstdtxn=1` is set. By setting the transaction version number to 3, TRUC transactions
|
||
request the application of limits on spending of their unconfirmed outputs. These
|
||
restrictions simplify the assessment of incentive compatibility of accepting or
|
||
replacing TRUC transactions, thus ensuring any replacements are more profitable for
|
||
the node and making fee-bumping more reliable. TRUC transactions are currently
|
||
nonstandard and can only be used on test networks where the standardness rules are
|
||
relaxed or disabled (e.g. with `-acceptnonstdtxn=1`). (#28948)
|
||
|
||
External Signing
|
||
----------------
|
||
|
||
- Support for external signing on Windows has been disabled. It will be re-enabled
|
||
once the underlying dependency (Boost Process), has been replaced with a different
|
||
library. (#28967)
|
||
|
||
Updated RPCs
|
||
------------
|
||
|
||
- The addnode RPC now follows the `-v2transport` option (now on by default, see above) for making connections.
|
||
It remains possible to specify the transport type manually with the v2transport argument of addnode. (#29239)
|
||
|
||
Build System
|
||
------------
|
||
|
||
- A C++20 capable compiler is now required to build Bitcoin Core. (#28349)
|
||
- MacOS releases are configured to use the hardened runtime libraries (#29127)
|
||
|
||
Wallet
|
||
------
|
||
|
||
- The CoinGrinder coin selection algorithm has been introduced to mitigate unnecessary
|
||
large input sets and lower transaction costs at high feerates. CoinGrinder
|
||
searches for the input set with minimal weight. Solutions found by
|
||
CoinGrinder will produce a change output. CoinGrinder is only active at
|
||
elevated feerates (default: 30+ sat/vB, based on `-consolidatefeerate`×3). (#27877)
|
||
- The Branch And Bound coin selection algorithm will be disabled when the subtract fee
|
||
from outputs feature is used. (#28994)
|
||
- If the birth time of a descriptor is detected to be later than the first transaction
|
||
involving that descriptor, the birth time will be reset to the earlier time. (#28920)
|
||
|
||
Low-level changes
|
||
=================
|
||
|
||
Pruning
|
||
-------
|
||
|
||
- When pruning during initial block download, more blocks will be pruned at each
|
||
flush in order to speed up the syncing of such nodes. (#20827)
|
||
|
||
Init
|
||
----
|
||
|
||
- Various fixes to prevent issues where subsequent instances of Bitcoin Core would
|
||
result in deletion of files in use by an existing instance. (#28784, #28946)
|
||
- Improved handling of empty `settings.json` files. (#29144)
|
||
|
||
Credits
|
||
=======
|
||
|
||
Thanks to everyone who directly contributed to this release:
|
||
|
||
- 22388o⚡️
|
||
- Aaron Clauson
|
||
- Amiti Uttarwar
|
||
- Andrew Toth
|
||
- Anthony Towns
|
||
- Antoine Poinsot
|
||
- Ava Chow
|
||
- Brandon Odiwuor
|
||
- brunoerg
|
||
- Chris Stewart
|
||
- Cory Fields
|
||
- dergoegge
|
||
- djschnei21
|
||
- Fabian Jahr
|
||
- fanquake
|
||
- furszy
|
||
- Gloria Zhao
|
||
- Greg Sanders
|
||
- Hennadii Stepanov
|
||
- Hernan Marino
|
||
- iamcarlos94
|
||
- ismaelsadeeq
|
||
- Jameson Lopp
|
||
- Jesse Barton
|
||
- John Moffett
|
||
- Jon Atack
|
||
- josibake
|
||
- jrakibi
|
||
- Justin Dhillon
|
||
- Kashif Smith
|
||
- kevkevin
|
||
- Kristaps Kaupe
|
||
- L0la L33tz
|
||
- Luke Dashjr
|
||
- Lőrinc
|
||
- marco
|
||
- MarcoFalke
|
||
- Mark Friedenbach
|
||
- Marnix
|
||
- Martin Leitner-Ankerl
|
||
- Martin Zumsande
|
||
- Max Edwards
|
||
- Murch
|
||
- muxator
|
||
- naiyoma
|
||
- Nikodemas Tuckus
|
||
- ns-xvrn
|
||
- pablomartin4btc
|
||
- Peter Todd
|
||
- Pieter Wuille
|
||
- Richard Myers
|
||
- Roman Zeyde
|
||
- Russell Yanofsky
|
||
- Ryan Ofsky
|
||
- Sebastian Falbesoner
|
||
- Sergi Delgado Segura
|
||
- Sjors Provoost
|
||
- stickies-v
|
||
- stratospher
|
||
- Supachai Kheawjuy
|
||
- TheCharlatan
|
||
- UdjinM6
|
||
- Vasil Dimov
|
||
- w0xlt
|
||
- willcl-ark
|
||
|
||
|
||
As well as to everyone that helped with translations on
|
||
[Transifex](https://www.transifex.com/bitcoin/bitcoin/).
|