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doc: add historical 0.20.2 release notes
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doc/release-notes/release-notes-0.20.2.md
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0.20.2 Release Notes
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====================
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Bitcoin Core version 0.20.2 is now available from:
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<https://bitcoincore.org/bin/bitcoin-core-0.20.2/>
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This minor release includes various bug fixes and performance
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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 in some cases), 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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Upgrading directly from a version of Bitcoin Core that has reached its EOL is
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possible, but it might take some time if the data directory needs to be migrated. Old
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wallet versions of Bitcoin Core are generally supported.
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Compatibility
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==============
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Bitcoin Core is supported and extensively tested on operating systems
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using the Linux kernel, macOS 10.12+, and Windows 7 and newer. Bitcoin
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Core should also work on most other Unix-like systems but is not as
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frequently tested on them. It is not recommended to use Bitcoin Core on
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unsupported systems.
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From Bitcoin Core 0.20.0 onwards, macOS versions earlier than 10.12 are no
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longer supported. Additionally, Bitcoin Core does not yet change appearance
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when macOS "dark mode" is activated.
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Known Bugs
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==========
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The process for generating the source code release ("tarball") has changed in an
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effort to make it more complete, however, there are a few regressions in
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this release:
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- The generated `configure` script is currently missing, and you will need to
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install autotools and run `./autogen.sh` before you can run
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`./configure`. This is the same as when checking out from git.
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- Instead of running `make` simply, you should instead run
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`BITCOIN_GENBUILD_NO_GIT=1 make`.
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Notable changes
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===============
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Changes regarding misbehaving peers
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-----------------------------------
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Peers that misbehave (e.g. send us invalid blocks) are now referred to as
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discouraged nodes in log output, as they're not (and weren't) strictly banned:
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incoming connections are still allowed from them, but they're preferred for
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eviction.
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Furthermore, a few additional changes are introduced to how discouraged
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addresses are treated:
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- Discouraging an address does not time out automatically after 24 hours
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(or the `-bantime` setting). Depending on traffic from other peers,
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discouragement may time out at an indeterminate time.
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- Discouragement is not persisted over restarts.
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- There is no method to list discouraged addresses. They are not returned by
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the `listbanned` RPC. That RPC also no longer reports the `ban_reason`
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field, as `"manually added"` is the only remaining option.
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- Discouragement cannot be removed with the `setban remove` RPC command.
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If you need to remove a discouragement, you can remove all discouragements by
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stop-starting your node.
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Notification changes
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--------------------
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`-walletnotify` notifications are now sent for wallet transactions that are
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removed from the mempool because they conflict with a new block. These
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notifications were sent previously before the v0.19 release, but had been
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broken since that release (bug
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[#18325](https://github.com/bitcoin/bitcoin/issues/18325)).
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PSBT changes
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------------
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PSBTs will contain both the non-witness utxo and the witness utxo for segwit
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inputs in order to restore compatibility with wallet software that are now
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requiring the full previous transaction for segwit inputs. The witness utxo
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is still provided to maintain compatibility with software which relied on its
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existence to determine whether an input was segwit.
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0.20.2 change log
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=================
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### P2P protocol and network code
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- #19620 Add txids with non-standard inputs to reject filter (sdaftuar)
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- #20146 Send post-verack handshake messages at most once (MarcoFalke)
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### Wallet
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- #19740 Simplify and fix CWallet::SignTransaction (achow101)
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### RPC and other APIs
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- #19836 Properly deserialize txs with witness before signing (MarcoFalke)
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- #20731 Add missing description of vout in getrawtransaction help text (benthecarman)
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### Build system
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- #20142 build: set minimum required Boost to 1.48.0 (fanquake)
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- #20298 use the new plistlib API (jonasschnelli)
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- #20880 gitian: Use custom MacOS code signing tool (achow101)
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- #22190 Use latest signapple commit (achow101)
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### Tests and QA
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- #19839 Set appveyor vm version to previous Visual Studio 2019 release. (sipsorcery)
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- #19842 Update the vcpkg checkout commit ID in appveyor config. (sipsorcery)
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- #20562 Test that a fully signed tx given to signrawtx is unchanged (achow101)
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### Miscellaneous
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- #19192 Extract net permissions doc (MarcoFalke)
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- #19777 Correct description for getblockstats's txs field (shesek)
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- #20080 Strip any trailing / in -datadir and -blocksdir paths (hebasto)
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- #20082 fixes read buffer to use min rather than max (EthanHeilman)
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- #20141 Avoid the use of abs64 in timedata (sipa)
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- #20756 Add missing field (permissions) to the getpeerinfo help (amitiuttarwar)
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- #20861 BIP 350: Implement Bech32m and use it for v1+ segwit addresses (sipa)
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- #22124 Update translations after closing 0.20.x on Transifex (hebasto)
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- #21471 fix bech32_encode calls in gen_key_io_test_vectors.py (sipa)
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- #22837 mention bech32m/BIP350 in doc/descriptors.md (sipa)
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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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- Aaron Clauson
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- Amiti Uttarwar
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- Andrew Chow
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- Ethan Heilman
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- fanquake
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- Hennadii Stepanov
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- Jonas Schnelli
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- MarcoFalke
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- Nadav Ivgi
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- Pieter Wuille
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- Suhas Daftuar
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As well as to everyone that helped with translations on
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[Transifex](https://www.transifex.com/bitcoin/bitcoin/).
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