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Bitcoin Core version 0.16.1 is now available from:
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<https://bitcoincore.org/bin/bitcoin-core-0.16.1/>
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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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How to Upgrade
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==============
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If you are running an older version, shut it down. Wait until it has completely
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shut down (which might take a few minutes for older versions), then run the
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installer (on Windows) or just copy over `/Applications/Bitcoin-Qt` (on Mac)
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or `bitcoind`/`bitcoin-qt` (on Linux).
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The first time you run version 0.15.0 or newer, your chainstate database will be converted to a
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new format, which will take anywhere from a few minutes to half an hour,
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depending on the speed of your machine.
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Note that the block database format also changed in version 0.8.0 and there is no
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automatic upgrade code from before version 0.8 to version 0.15.0 or higher. Upgrading
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directly from 0.7.x and earlier without re-downloading the blockchain is not supported.
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However, as usual, old wallet versions are still supported.
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Downgrading warning
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-------------------
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Wallets created in 0.16 and later are not compatible with versions prior to 0.16
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and will not work if you try to use newly created wallets in older versions. Existing
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wallets that were created with older versions are not affected by this.
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Compatibility
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==============
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Bitcoin Core is extensively tested on multiple operating systems using
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the Linux kernel, macOS 10.8+, and Windows Vista and later. Windows XP is not supported.
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Bitcoin Core should also work on most other Unix-like systems but is not
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frequently tested on them.
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Notable changes
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===============
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Miner block size removed
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------------------------
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The `-blockmaxsize` option for miners to limit their blocks' sizes was
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deprecated in version 0.15.1, and has now been removed. Miners should use the
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`-blockmaxweight` option if they want to limit the weight of their blocks'
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weights.
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0.16.1 change log
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------------------
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### Policy
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- #11423 `d353dd1` [Policy] Several transaction standardness rules (jl2012)
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### Mining
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- #12756 `e802c22` [config] Remove blockmaxsize option (jnewbery)
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### Block and transaction handling
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- #13199 `c71e535` Bugfix: ensure consistency of m_failed_blocks after reconsiderblock (sdaftuar)
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- #13023 `bb79aaf` Fix some concurrency issues in ActivateBestChain() (skeees)
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### P2P protocol and network code
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- #12626 `f60e84d` Limit the number of IPs addrman learns from each DNS seeder (EthanHeilman)
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### Wallet
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- #13265 `5d8de76` Exit SyncMetaData if there are no transactions to sync (laanwj)
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- #13030 `5ff571e` Fix zapwallettxes/multiwallet interaction. (jnewbery)
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### GUI
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- #12999 `1720eb3` Show the Window when double clicking the taskbar icon (ken2812221)
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- #12650 `f118a7a` Fix issue: "default port not shown correctly in settings dialog" (251Labs)
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- #13251 `ea487f9` Rephrase Bech32 checkbox texts, and enable it with legacy address default (fanquake)
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### Build system
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- #12474 `b0f692f` Allow depends system to support armv7l (hkjn)
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- #12585 `72a3290` depends: Switch to downloading expat from GitHub (fanquake)
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- #12648 `46ca8f3` test: Update trusted git root (MarcoFalke)
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- #11995 `686cb86` depends: Fix Qt build with Xcode 9 (fanquake)
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- #12636 `845838c` backport: #11995 Fix Qt build with Xcode 9 (fanquake)
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- #12946 `e055bc0` depends: Fix Qt build with XCode 9.3 (fanquake)
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- #12998 `7847b92` Default to defining endian-conversion DECLs in compat w/o config (TheBlueMatt)
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### Tests and QA
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- #12447 `01f931b` Add missing signal.h header (laanwj)
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- #12545 `1286f3e` Use wait_until to ensure ping goes out (Empact)
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- #12804 `4bdb0ce` Fix intermittent rpc_net.py failure. (jnewbery)
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- #12553 `0e98f96` Prefer wait_until over polling with time.sleep (Empact)
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- #12486 `cfebd40` Round target fee to 8 decimals in assert_fee_amount (kallewoof)
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- #12843 `df38b13` Test starting bitcoind with -h and -version (jnewbery)
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- #12475 `41c29f6` Fix python TypeError in script.py (MarcoFalke)
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- #12638 `0a76ed2` Cache only chain and wallet for regtest datadir (MarcoFalke)
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- #12902 `7460945` Handle potential cookie race when starting node (sdaftuar)
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- #12904 `6c26df0` Ensure bitcoind processes are cleaned up when tests end (sdaftuar)
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- #13049 `9ea62a3` Backports (MarcoFalke)
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- #13201 `b8aacd6` Handle disconnect_node race (sdaftuar)
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### Miscellaneous
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- #12518 `a17fecf` Bump leveldb subtree (MarcoFalke)
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- #12442 `f3b8d85` devtools: Exclude patches from lint-whitespace (MarcoFalke)
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- #12988 `acdf433` Hold cs_main while calling UpdatedBlockTip() signal (skeees)
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- #12985 `0684cf9` Windows: Avoid launching as admin when NSIS installer ends. (JeremyRand)
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### Documentation
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- #12637 `60086dd` backport: #12556 fix version typo in getpeerinfo RPC call help (fanquake)
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- #13184 `4087dd0` RPC Docs: `gettxout*`: clarify bestblock and unspent counts (harding)
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- #13246 `6de7543` Bump to Ubuntu Bionic 18.04 in build-windows.md (ken2812221)
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- #12556 `e730b82` Fix version typo in getpeerinfo RPC call help (tamasblummer)
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Credits
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=======
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Thanks to everyone who directly contributed to this release:
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- 251
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- Ben Woosley
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- Chun Kuan Lee
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- David A. Harding
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- e0
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- fanquake
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- Henrik Jonsson
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- JeremyRand
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- Jesse Cohen
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- John Newbery
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- Johnson Lau
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- Karl-Johan Alm
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- Luke Dashjr
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- MarcoFalke
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- Matt Corallo
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- Pieter Wuille
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- Suhas Daftuar
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- Tamas Blummer
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- Wladimir J. van der Laan
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As well as everyone that helped translating on [Transifex](https://www.transifex.com/projects/p/bitcoin/).
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