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kevacoin/doc/release-notes/release-notes-0.10.4.md

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Bitcoin Core version 0.10.4 is now available from:

https://bitcoin.org/bin/bitcoin-core-0.10.4/

This is a new minor version release, bringing bug fixes, the BIP65 (CLTV) consensus change, and relay policy preparation for BIP113. It is recommended to upgrade to this version as soon as possible.

Please report bugs using the issue tracker at github:

https://github.com/bitcoin/bitcoin/issues

Upgrading and downgrading

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 for older versions), then run the installer (on Windows) or just copy over /Applications/Bitcoin-Qt (on Mac) or bitcoind/bitcoin-qt (on Linux).

Downgrade warning

Because release 0.10.0 and later makes use of headers-first synchronization and parallel block download (see further), the block files and databases are not backwards-compatible with pre-0.10 versions of Bitcoin Core or other software:

  • Blocks will be stored on disk out of order (in the order they are received, really), which makes it incompatible with some tools or other programs. Reindexing using earlier versions will also not work anymore as a result of this.

  • The block index database will now hold headers for which no block is stored on disk, which earlier versions won't support.

If you want to be able to downgrade smoothly, make a backup of your entire data directory. Without this your node will need start syncing (or importing from bootstrap.dat) anew afterwards. It is possible that the data from a completely synchronised 0.10 node may be usable in older versions as-is, but this is not supported and may break as soon as the older version attempts to reindex.

This does not affect wallet forward or backward compatibility. There are no known problems when downgrading from 0.11.x to 0.10.x.

Notable changes since 0.10.3

BIP65 soft fork to enforce OP_CHECKLOCKTIMEVERIFY opcode

This release includes several changes related to the BIP65 soft fork which redefines the existing OP_NOP2 opcode as OP_CHECKLOCKTIMEVERIFY (CLTV) so that a transaction output can be made unspendable until a specified point in the future.

  1. This release will only relay and mine transactions spending a CLTV output if they comply with the BIP65 rules as provided in code.

  2. This release will produce version 4 blocks by default. Please see the notice to miners below.

  3. Once 951 out of a sequence of 1,001 blocks on the local node's best block chain contain version 4 (or higher) blocks, this release will no longer accept new version 3 blocks and it will only accept version 4 blocks if they comply with the BIP65 rules for CLTV.

For more information about the soft-forking change, please see https://github.com/bitcoin/bitcoin/pull/6351

Graphs showing the progress towards block version 4 adoption may be found at the URLs below:

Notice to miners: Bitcoin Core’s block templates are now for version 4 blocks only, and any mining software relying on its getblocktemplate must be updated in parallel to use libblkmaker either version FIXME or any version from FIXME onward.

  • If you are solo mining, this will affect you the moment you upgrade Bitcoin Core, which must be done prior to BIP65 achieving its 951/1001 status.

  • If you are mining with the stratum mining protocol: this does not affect you.

  • If you are mining with the getblocktemplate protocol to a pool: this will affect you at the pool operator’s discretion, which must be no later than BIP65 achieving its 951/1001 status.

Windows bug fix for corrupted UTXO database on unclean shutdowns

Several Windows users reported that they often need to reindex the entire blockchain after an unclean shutdown of Bitcoin Core on Windows (or an unclean shutdown of Windows itself). Although unclean shutdowns remain unsafe, this release no longer relies on memory-mapped files for the UTXO database, which significantly reduced the frequency of unclean shutdowns leading to required reindexes during testing.

For more information, see: https://github.com/bitcoin/bitcoin/pull/6917

Other fixes for database corruption on Windows are expected in the next major release.

0.10.4 Change log

Detailed release notes follow. This overview includes changes that affect behavior, not code moves, refactors and string updates. For convenience in locating the code changes and accompanying discussion, both the pull request and git merge commit are mentioned.

  • #6953 8b3311f alias -h for --help
  • #6953 97546fc Change URLs to https in debian/control
  • #6953 38671bf Update debian/changelog and slight tweak to debian/control
  • #6953 256321e Correct spelling mistakes in doc folder
  • #6953 eae0350 Clarification of unit test build instructions
  • #6953 90897ab Update bluematt-key, the old one is long-since revoked
  • #6953 a2f2fb6 build: disable -Wself-assign
  • #6953 cf67d8b Bugfix: Allow mining on top of old tip blocks for testnet (fixes testnet-in-a-box use case)
  • #6953 b3964e3 Drop "with minimal dependencies" from description
  • #6953 43c2789 Split bitcoin-tx into its own package
  • #6953 dfe0d4d Include bitcoin-tx binary on Debian/Ubuntu
  • #6953 612efe8 [Qt] Raise debug window when requested
  • #6953 3ad96bd Fix locking in GetTransaction
  • #6953 9c81005 Fix spelling of Qt
  • #6946 94b67e5 Update LevelDB
  • #6706 5dc72f8 CLTV: Add more tests to improve coverage
  • #6706 6a1343b Add RPC tests for the CHECKLOCKTIMEVERIFY (BIP65) soft-fork
  • #6706 4137248 Add CHECKLOCKTIMEVERIFY (BIP65) soft-fork logic
  • #6706 0e01d0f Enable CHECKLOCKTIMEVERIFY as a standard script verify flag
  • #6706 6d01325 Replace NOP2 with CHECKLOCKTIMEVERIFY (BIP65)
  • #6706 750d54f Move LOCKTIME_THRESHOLD to src/script/script.h
  • #6706 6897468 Make CScriptNum() take nMaxNumSize as an argument
  • #6867 5297194 Set TCP_NODELAY on P2P sockets
  • #6836 fb818b6 Bring historical release notes up to date
  • #6852 0b3fd07 build: make sure OpenSSL heeds noexecstack

Credits

Thanks to everyone who directly contributed to this release:

  • Alex Morcos
  • Daniel Cousens
  • Diego Viola
  • Eric Lombrozo
  • Esteban Ordano
  • Gregory Maxwell
  • Luke Dashjr
  • MarcoFalke
  • Matt Corallo
  • Micha
  • Mitchell Cash
  • Peter Todd
  • Pieter Wuille
  • Wladimir J. van der Laan
  • Zak Wilcox

And those who contributed additional code review and/or security research.

As well as everyone that helped translating on Transifex.