204 lines
7.6 KiB
Markdown
204 lines
7.6 KiB
Markdown
(note: this is a temporary file, to be added-to by anybody, and moved to
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release-notes at release time)
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Bitcoin Core version *version* is now available from:
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<https://bitcoin.org/bin/bitcoin-core-*version*/>
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This is a new major version release, including new features, various bugfixes
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and performance improvements, as well as updated translations.
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Please report bugs using the issue tracker at github:
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<https://github.com/bitcoin/bitcoin/issues>
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To receive security and update notifications, please subscribe to:
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<https://bitcoincore.org/en/list/announcements/join/>
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Compatibility
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==============
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Microsoft ended support for Windows XP on [April 8th, 2014](https://www.microsoft.com/en-us/WindowsForBusiness/end-of-xp-support),
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an OS initially released in 2001. This means that not even critical security
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updates will be released anymore. Without security updates, using a bitcoin
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wallet on a XP machine is irresponsible at least.
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In addition to that, with 0.12.x there have been varied reports of Bitcoin Core
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randomly crashing on Windows XP. It is [not clear](https://github.com/bitcoin/bitcoin/issues/7681#issuecomment-217439891)
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what the source of these crashes is, but it is likely that upstream
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libraries such as Qt are no longer being tested on XP.
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We do not have time nor resources to provide support for an OS that is
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end-of-life. From 0.13.0 on, Windows XP is no longer supported. Users are
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suggested to upgrade to a newer verion of Windows, or install an alternative OS
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that is supported.
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No attempt is made to prevent installing or running the software on Windows XP,
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you can still do so at your own risk, but do not expect it to work: do not
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report issues about Windows XP to the issue tracker.
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Notable changes
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===============
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Database cache memory increased
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--------------------------------
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As a result of growth of the UTXO set, performance with the prior default
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database cache of 100 MiB has suffered.
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For this reason the default was changed to 300 MiB in this release.
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For nodes on low-memory systems, the database cache can be changed back to
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100 MiB (or to another value) by either:
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- Adding `dbcache=100` in bitcoin.conf
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- Changing it in the GUI under `Options → Size of database cache`
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Note that the database cache setting has the most performance impact
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during initial sync of a node, and when catching up after downtime.
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bitcoin-cli: arguments privacy
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--------------------------------
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The RPC command line client gained a new argument, `-stdin`
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to read extra arguments from standard input, one per line until EOF/Ctrl-D.
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For example:
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$ echo -e "mysecretcode\n120" | src/bitcoin-cli -stdin walletpassphrase
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It is recommended to use this for sensitive information such as wallet
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passphrases, as command-line arguments can usually be read from the process
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table by any user on the system.
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RPC low-level changes
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----------------------
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- `gettxoutsetinfo` UTXO hash (`hash_serialized`) has changed. There was a divergence between
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32-bit and 64-bit platforms, and the txids were missing in the hashed data. This has been
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fixed, but this means that the output will be different than from previous versions.
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- Full UTF-8 support in the RPC API. Non-ASCII characters in, for example,
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wallet labels have always been malformed because they weren't taken into account
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properly in JSON RPC processing. This is no longer the case. This also affects
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the GUI debug console.
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C++11 and Python 3
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-------------------
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Various code modernizations have been done. The Bitcoin Core code base has
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started using C++11. This means that a C++11-capable compiler is now needed for
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building. Effectively this means GCC 4.7 or higher, or Clang 3.3 or higher.
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When cross-compiling for a target that doesn't have C++11 libraries, configure with
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`./configure --enable-glibc-back-compat ... LDFLAGS=-static-libstdc++`.
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For running the functional tests in `qa/rpc-tests`, Python3.4 or higher is now
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required.
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Linux ARM builds
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------------------
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Due to popular request, Linux ARM builds have been added to the uploaded
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executables.
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The following extra files can be found in the download directory or torrent:
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- `bitcoin-${VERSION}-arm-linux-gnueabihf.tar.gz`: Linux binaries for the most
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common 32-bit ARM architecture.
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- `bitcoin-${VERSION}-aarch64-linux-gnu.tar.gz`: Linux binaries for the most
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common 64-bit ARM architecture.
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ARM builds are still experimental. If you have problems on a certain device or
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Linux distribution combination please report them on the bug tracker, it may be
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possible to resolve them.
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Note that Android is not considered ARM Linux in this context. The executables
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are not expected to work out of the box on Android.
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0.13.0 Change log
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=================
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Detailed release notes follow. This overview includes changes that affect
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behavior, not code moves, refactors and string updates. For convenience in locating
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the code changes and accompanying discussion, both the pull request and
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git merge commit are mentioned.
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### RPC and REST
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Asm script outputs now contain OP_CHECKLOCKTIMEVERIFY in place of OP_NOP2
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-------------------------------------------------------------------------
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OP_NOP2 has been renamed to OP_CHECKLOCKTIMEVERIFY by [BIP
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65](https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki)
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The following outputs are affected by this change:
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- RPC `getrawtransaction` (in verbose mode)
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- RPC `decoderawtransaction`
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- RPC `decodescript`
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- REST `/rest/tx/` (JSON format)
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- REST `/rest/block/` (JSON format when including extended tx details)
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- `bitcoin-tx -json`
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New mempool information RPC calls
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---------------------------------
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RPC calls have been added to output detailed statistics for individual mempool
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entries, as well as to calculate the in-mempool ancestors or descendants of a
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transaction: see `getmempoolentry`, `getmempoolancestors`, `getmempooldescendants`.
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### ZMQ
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Each ZMQ notification now contains an up-counting sequence number that allows
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listeners to detect lost notifications.
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The sequence number is always the last element in a multi-part ZMQ notification and
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therefore backward compatible.
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Each message type has its own counter.
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(https://github.com/bitcoin/bitcoin/pull/7762)
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### Configuration and command-line options
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### Block and transaction handling
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### P2P protocol and network code
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The p2p alert system has been removed in #7692 and the 'alert' message is no longer supported.
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Fee filtering of invs (BIP 133)
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------------------------------------
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The optional new p2p message "feefilter" is implemented and the protocol
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version is bumped to 70013. Upon receiving a feefilter message from a peer,
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a node will not send invs for any transactions which do not meet the filter
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feerate. [BIP 133](https://github.com/bitcoin/bips/blob/master/bip-0133.mediawiki)
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### Validation
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### Build system
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### Wallet
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Hierarchical Deterministic Key Generation
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-----------------------------------------
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Newly created wallets will use hierarchical deterministic key generation
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according to BIP32 (keypath m/0'/0'/k').
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Existing wallets will still use traditional key generation.
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Backups of HD wallets, regardless of when they have been created, can
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therefore be used to re-generate all possible private keys, even the
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ones which haven't already been generated during the time of the backup.
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HD key generation for new wallets can be disabled by `-usehd=0`. Keep in
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mind that this flag only has affect on newly created wallets.
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You can't disable HD key generation once you have created a HD wallet.
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There is no distinction between internal (change) and external keys.
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[Pull request](https://github.com/bitcoin/bitcoin/pull/8035/files), [BIP 32](https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki)
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### GUI
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### Tests
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### Miscellaneous
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