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Bitcoin Core version 0.10.4 is now available from:
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<https://bitcoin.org/bin/bitcoin-core-0.10.4/>
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This is a new minor version release, bringing bug fixes, the BIP65
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(CLTV) consensus change, and relay policy preparation for BIP113. It is
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recommended to upgrade to this version as soon as possible.
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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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Upgrading and downgrading
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=========================
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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) or
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bitcoind/bitcoin-qt (on Linux).
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Downgrade warning
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------------------
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Because release 0.10.0 and later makes use of headers-first synchronization and
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parallel block download (see further), the block files and databases are not
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backwards-compatible with pre-0.10 versions of Bitcoin Core or other software:
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* Blocks will be stored on disk out of order (in the order they are
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received, really), which makes it incompatible with some tools or
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other programs. Reindexing using earlier versions will also not work
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anymore as a result of this.
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* The block index database will now hold headers for which no block is
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stored on disk, which earlier versions won't support.
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If you want to be able to downgrade smoothly, make a backup of your entire data
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directory. Without this your node will need start syncing (or importing from
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bootstrap.dat) anew afterwards. It is possible that the data from a completely
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synchronised 0.10 node may be usable in older versions as-is, but this is not
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supported and may break as soon as the older version attempts to reindex.
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This does not affect wallet forward or backward compatibility. There are no
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known problems when downgrading from 0.11.x to 0.10.x.
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Notable changes since 0.10.3
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============================
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BIP65 soft fork to enforce OP_CHECKLOCKTIMEVERIFY opcode
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--------------------------------------------------------
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This release includes several changes related to the [BIP65][] soft fork
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which redefines the existing OP_NOP2 opcode as OP_CHECKLOCKTIMEVERIFY
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(CLTV) so that a transaction output can be made unspendable until a
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specified point in the future.
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1. This release will only relay and mine transactions spending a CLTV
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output if they comply with the BIP65 rules as provided in code.
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2. This release will produce version 4 blocks by default. Please see the
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*notice to miners* below.
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3. Once 951 out of a sequence of 1,001 blocks on the local node's best block
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chain contain version 4 (or higher) blocks, this release will no
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longer accept new version 3 blocks and it will only accept version 4
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blocks if they comply with the BIP65 rules for CLTV.
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For more information about the soft-forking change, please see
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<https://github.com/bitcoin/bitcoin/pull/6351>
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Graphs showing the progress towards block version 4 adoption may be
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found at the URLs below:
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- Block versions over the last 50,000 blocks as progress towards BIP65
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consensus enforcement: <http://bitcoin.sipa.be/ver-50k.png>
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- Block versions over the last 2,000 blocks showing the days to the
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earliest possible BIP65 consensus-enforced block: <http://bitcoin.sipa.be/ver-2k.png>
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**Notice to miners:** Bitcoin Core’s block templates are now for
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version 4 blocks only, and any mining software relying on its
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getblocktemplate must be updated in parallel to use libblkmaker either
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version FIXME or any version from FIXME onward.
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- If you are solo mining, this will affect you the moment you upgrade
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Bitcoin Core, which must be done prior to BIP65 achieving its 951/1001
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status.
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- If you are mining with the stratum mining protocol: this does not
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affect you.
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- If you are mining with the getblocktemplate protocol to a pool: this
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will affect you at the pool operator’s discretion, which must be no
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later than BIP65 achieving its 951/1001 status.
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[BIP65]: https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki
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Windows bug fix for corrupted UTXO database on unclean shutdowns
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----------------------------------------------------------------
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Several Windows users reported that they often need to reindex the
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entire blockchain after an unclean shutdown of Bitcoin Core on Windows
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(or an unclean shutdown of Windows itself). Although unclean shutdowns
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remain unsafe, this release no longer relies on memory-mapped files for
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the UTXO database, which significantly reduced the frequency of unclean
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shutdowns leading to required reindexes during testing.
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For more information, see: <https://github.com/bitcoin/bitcoin/pull/6917>
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Other fixes for database corruption on Windows are expected in the
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next major release.
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0.10.4 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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- #6953 `8b3311f` alias -h for --help
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- #6953 `97546fc` Change URLs to https in debian/control
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- #6953 `38671bf` Update debian/changelog and slight tweak to debian/control
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- #6953 `256321e` Correct spelling mistakes in doc folder
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- #6953 `eae0350` Clarification of unit test build instructions
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- #6953 `90897ab` Update bluematt-key, the old one is long-since revoked
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- #6953 `a2f2fb6` build: disable -Wself-assign
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- #6953 `cf67d8b` Bugfix: Allow mining on top of old tip blocks for testnet (fixes testnet-in-a-box use case)
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- #6953 `b3964e3` Drop "with minimal dependencies" from description
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- #6953 `43c2789` Split bitcoin-tx into its own package
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- #6953 `dfe0d4d` Include bitcoin-tx binary on Debian/Ubuntu
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- #6953 `612efe8` [Qt] Raise debug window when requested
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- #6953 `3ad96bd` Fix locking in GetTransaction
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- #6953 `9c81005` Fix spelling of Qt
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- #6946 `94b67e5` Update LevelDB
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- #6706 `5dc72f8` CLTV: Add more tests to improve coverage
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- #6706 `6a1343b` Add RPC tests for the CHECKLOCKTIMEVERIFY (BIP65) soft-fork
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- #6706 `4137248` Add CHECKLOCKTIMEVERIFY (BIP65) soft-fork logic
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- #6706 `0e01d0f` Enable CHECKLOCKTIMEVERIFY as a standard script verify flag
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- #6706 `6d01325` Replace NOP2 with CHECKLOCKTIMEVERIFY (BIP65)
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- #6706 `750d54f` Move LOCKTIME_THRESHOLD to src/script/script.h
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- #6706 `6897468` Make CScriptNum() take nMaxNumSize as an argument
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- #6867 `5297194` Set TCP_NODELAY on P2P sockets
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- #6836 `fb818b6` Bring historical release notes up to date
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- #6852 `0b3fd07` build: make sure OpenSSL heeds noexecstack
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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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- Alex Morcos
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- Daniel Cousens
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- Diego Viola
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- Eric Lombrozo
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- Esteban Ordano
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- Gregory Maxwell
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- Luke Dashjr
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- MarcoFalke
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- Matt Corallo
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- Micha
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- Mitchell Cash
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- Peter Todd
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- Pieter Wuille
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- Wladimir J. van der Laan
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- Zak Wilcox
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And those who contributed additional code review and/or security research.
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As well as everyone that helped translating on [Transifex](https://www.transifex.com/projects/p/bitcoin/).
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