[Docs] First-draft release notes for 0.11.2RC1
This commit is contained in:
David A. Harding
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Bitcoin Core version 0.11.1 is now available from:
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Bitcoin Core version 0.11.2 is now available from:
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<https://bitcoin.org/bin/bitcoin-core-0.11.1/>
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<https://bitcoin.org/bin/bitcoin-core-0.11.2/>
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This is a new minor version release, bringing security fixes. It is recommended
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This is a new minor version release, bringing new features and bug fixes. It is recommended
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to upgrade to this version as soon as possible.
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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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Please report bugs using the issue tracker at github:
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@ -44,72 +44,93 @@ 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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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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known problems when downgrading from 0.11.x to 0.10.x.
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Notable changes
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Notable changes since 0.11.1
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===============
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============================
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Fix buffer overflow in bundled upnp
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BIP65 soft fork to enforce OP_CHECKLOCKTIMEVERIFY opcode
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------------------------------------
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--------------------------------------------------------
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Bundled miniupnpc was updated to 1.9.20151008. This fixes a buffer overflow in
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This release includes several changes related to the [BIP65][] soft fork
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the XML parser during initial network discovery.
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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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Details can be found here: http://talosintel.com/reports/TALOS-2015-0035/
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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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This applies to the distributed executables only, not when building from source or
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2. This release will produce version 4 blocks by default. Please see the
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using distribution provided packages.
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*notice to miners below*.
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Additionally, upnp has been disabled by default. This may result in a lower
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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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number of reachable nodes on IPv4, however this prevents future libupnpc
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chain contain version 4 (or higher) blocks, this release will no
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vulnerabilities from being a structural risk to the network
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longer accept new version 3 blocks and it will only accept version 4
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(see https://github.com/bitcoin/bitcoin/pull/6795).
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blocks if they comply with the BIP65 rules for CLTV.
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Test for LowS signatures before relaying
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For more information about the soft-forking change, please see
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-----------------------------------------
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<https://github.com/bitcoin/bitcoin/pull/6351>
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Make the node require the canonical 'low-s' encoding for ECDSA signatures when
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**Notice to miners:** Bitcoin Core’s block templates are now for
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relaying or mining. This removes a nuisance malleability vector.
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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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Consensus behavior is unchanged.
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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 widely deployed this change would eliminate the last remaining known vector
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- If you are mining with the stratum mining protocol: this does not
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for nuisance malleability on SIGHASH_ALL P2PKH transactions. On the down-side
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affect you.
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it will block most transactions made by sufficiently out of date software.
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Unlike the other avenues to change txids on transactions this
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- If you are mining with the getblocktemplate protocol to a pool: this
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one was randomly violated by all deployed bitcoin software prior to
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will affect you at the pool operator’s discretion, which must be no
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its discovery. So, while other malleability vectors where made
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later than BIP66 achieving its 951/1001 status.
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non-standard as soon as they were discovered, this one has remained
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permitted. Even BIP62 did not propose applying this rule to
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old version transactions, but conforming implementations have become
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much more common since BIP62 was initially written.
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Bitcoin Core has produced compatible signatures since a28fb70e in
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[BIP65]: https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki
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September 2013, but this didn't make it into a release until 0.9
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in March 2014; Bitcoinj has done so for a similar span of time.
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Bitcoinjs and electrum have been more recently updated.
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This does not replace the need for BIP62 or similar, as miners can
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BIP113 mempool-only locktime enforment using GetMedianTimePast()
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still cooperate to break transactions. Nor does it replace the
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----------------------------------------------------------------
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need for wallet software to handle malleability sanely[1]. This
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only eliminates the cheap and irritating DOS attack.
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[1] On the Malleability of Bitcoin Transactions
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Bitcoin transactions currently may specify a locktime indicating when
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Marcin Andrychowicz, Stefan Dziembowski, Daniel Malinowski, Łukasz Mazurek
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they may be added to a valid block. Current consensus rules require
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http://fc15.ifca.ai/preproceedings/bitcoin/paper_9.pdf
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that blocks have a block header time greater than the locktime specified
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in any transaction in that block.
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Minimum relay fee default increase
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Miners get to choose what time they use for their header time, with the
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-----------------------------------
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consensus rule being that no node will accept a block whose time is more
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than two hours in the future. This creates a incentive for miners to
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set their header times to future values in order to include locktimed
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transactions which weren't supposed to be included for up to two more
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hours.
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The default for the `-minrelaytxfee` setting has been increased from `0.00001`
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The consensus rules also specify that valid blocks may have a header
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to `0.00005`.
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time greater than that of the median of the 11 previous blocks. This
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GetMedianTimePast() time has a key feature we generally associate with
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time: it can't go backwards.
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This is necessitated by the current transaction flooding, causing
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[BIP113][] specifies a soft fork (**not enforced in this release**) that
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outrageous memory usage on nodes due to the mempool ballooning. This is a
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weakens this perverse incentive for individual miners to use a future
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temporary measure, bridging the time until a dynamic method for determining
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time by requiring that valid blocks have a computed GetMedianTimePast()
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this fee is merged (which will be in 0.12).
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greater than the locktime specified in any transaction in that block.
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(see https://github.com/bitcoin/bitcoin/pull/6793, as well as the 0.11
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Mempool inclusion rules currently require transactions to be valid for
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release notes, in which this value was suggested)
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immediate inclusion in a block in order to be accepted into the mempool.
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This release begins applying the BIP113 rule to received transactions,
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so transaction whose time is greater than the GetMedianTimePast() will
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no longer be accepted into the mempool.
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**Implication for miners:** you may begin rejecting locktime
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transactions that could be included under the current consensus rules.
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Rejecting those transactions now means that you don't have to worry
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about producing invalid blocks when BIP113 becomes consensus enforced.
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**Implication for users:** GetMedianTimePast() always trails behind the
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current time, so a transaction locktime set to the present time will be
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rejected by nodes running this release until the median time moves
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forward. To compensate, subtract one hour (3,600) seconds from your
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locktimes to allow those transactions to be included in mempools at
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approximately the expected time.
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[BIP113]: https://github.com/bitcoin/bips/blob/master/bip-0113.mediawiki
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0.11.1 Change log
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0.11.1 Change log
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=================
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=================
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@ -119,54 +140,50 @@ behavior, not code moves, refactors and string updates. For convenience in locat
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the code changes and accompanying discussion, both the pull request and
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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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git merge commit are mentioned.
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- #6438 `2531438` openssl: avoid config file load/race
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- #6707 `684636b` Make CScriptNum() take nMaxNumSize as an argument
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- #6439 `980f820` Updated URL location of netinstall for Debian
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- #6707 `4fa7a04` Replace NOP2 with CHECKLOCKTIMEVERIFY (BIP65)
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- #6384 `8e5a969` qt: Force TLS1.0+ for SSL connections
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- #6707 `6ea5ca4` Enable CHECKLOCKTIMEVERIFY as a standard script verify flag
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- #6471 `92401c2` Depends: bump to qt 5.5
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- #6707 `5e82e1c` Add CHECKLOCKTIMEVERIFY (BIP65) soft-fork logic
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- #6224 `93b606a` Be even stricter in processing unrequested blocks
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- #6707 `ba1da90` Show softfork status in getblockchaininfo
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- #6571 `100ac4e` libbitcoinconsensus: avoid a crash in multi-threaded environments
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- #6707 `6af25b0` Add BIP65 to getblockchaininfo softforks list
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- #6545 `649f5d9` Do not store more than 200 timedata samples.
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- #6825 `01878c9` Fix locking in GetTransaction
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- #6694 `834e299` [QT] fix thin space word wrap line break issue
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- #6825 `b3eaa30` [Qt] Raise debug window when requested
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- #6703 `1cd7952` Backport bugfixes to 0.11
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- #6825 `1e672ae` Debian/Ubuntu: Include bitcoin-tx binary
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- #6750 `5ed8d0b` Recent rejects backport to v0.11
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- #6825 `2394f4d` Debian/Ubuntu: Split bitcoin-tx into its own package
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- #6769 `71cc9d9` Test LowS in standardness, removes nuisance malleability vector.
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- #6825 `33d6825` Bugfix: Allow mining on top of old tip blocks for testnet
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- #6789 `b4ad73f` Update miniupnpc to 1.9.20151008
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- #6945 `21e58b8` build: make sure OpenSSL heeds noexecstack
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- #6785 `b4dc33e` Backport to v0.11: In (strCommand == "tx"), return if AlreadyHave()
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- #6825 `af6edac` alias `-h` for `--help`
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- #6412 `0095b9a` Test whether created sockets are select()able
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- #6945 `95a5039` Set TCP_NODELAY on P2P sockets.
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- #6795 `4dbcec0` net: Disable upnp by default
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- #6945 `dfe55bd` Do not allow blockfile pruning during reindex.
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- #6793 `e7bcc4a` Bump minrelaytxfee default
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- #6884 `a1d3c6f` Add rules--presently disabled--for using GetMedianTimePast as end point for lock-time calculations
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- #6884 `f720c5f` Enable policy enforcing GetMedianTimePast as the end point of lock-time constraints
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- #6917 `0af5b8e` leveldb: Win32WritableFile without memory mapping
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- #6945 `70de437` Update LevelDB
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- #6948 `4e895b0` Always flush block and undo when switching to new file
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Credits
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Credits
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=======
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=======
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Thanks to everyone who directly contributed to this release:
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Thanks to everyone who directly contributed to this release:
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- Adam Weiss
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- Alex Morcos
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- Alex Morcos
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- Casey Rodarmor
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- Chris Kleeschulte
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- Cory Fields
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- Daniel Cousens
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- fanquake
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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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- Gregory Maxwell
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- Jonas Schnelli
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- J Ross Nicoll
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- Luke Dashjr
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- Luke Dashjr
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- Pavel Janík
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- Marco Falke
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- Pavel Vasin
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- Mark Friedenbach
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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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- Peter Todd
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- Pieter Wuille
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- Pieter Wuille
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- randy-waterhouse
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- Ross Nicoll
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- Suhas Daftuar
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- tailsjoin
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- ฿tcDrak
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- Tom Harding
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- Veres Lajos
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- Wladimir J. van der Laan
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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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And those who contributed additional code review and/or security research.
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- timothy on IRC for reporting the issue
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- Vulnerability in miniupnp discovered by Aleksandar Nikolic of Cisco Talos
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As well as everyone that helped translating on [Transifex](https://www.transifex.com/projects/p/bitcoin/).
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As well as everyone that helped translating on [Transifex](https://www.transifex.com/projects/p/bitcoin/).
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