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Author Topic: Bitcoin Core version 0.11.2 released  (Read 18779 times)
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November 13, 2015, 12:26:08 PM
 #1

Bitcoin Core version 0.11.2 is now available from:

https://bitcoin.org/bin/bitcoin-core-0.11.2

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 0.11.1
============================

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:

- Block versions over the last 50,000 blocks as progress towards BIP65
  consensus enforcement: http://bitcoin.sipa.be/ver-50k.png

- Block versions over the last 2,000 blocks showing the days to the
  earliest possible BIP65 consensus-enforced block: http://bitcoin.sipa.be/ver-2k.png

**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 0.4.3 or any version from 0.5.2 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.

[BIP65]: https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki

BIP113 mempool-only locktime enforcement using GetMedianTimePast()
----------------------------------------------------------------

Bitcoin transactions currently may specify a locktime indicating when
they may be added to a valid block.  Current consensus rules require
that blocks have a block header time greater than the locktime specified
in any transaction in that block.

Miners get to choose what time they use for their header time, with the
consensus rule being that no node will accept a block whose time is more
than two hours in the future.  This creates a incentive for miners to
set their header times to future values in order to include locktimed
transactions which weren't supposed to be included for up to two more
hours.

The consensus rules also specify that valid blocks may have a header
time greater than that of the median of the 11 previous blocks.  This
GetMedianTimePast() time has a key feature we generally associate with
time: it can't go backwards.

[BIP113][] specifies a soft fork (**not enforced in this release**) that
weakens this perverse incentive for individual miners to use a future
time by requiring that valid blocks have a computed GetMedianTimePast()
greater than the locktime specified in any transaction in that block.

Mempool inclusion rules currently require transactions to be valid for
immediate inclusion in a block in order to be accepted into the mempool.
This release begins applying the BIP113 rule to received transactions,
so transaction whose time is greater than the GetMedianTimePast() will
no longer be accepted into the mempool.

**Implication for miners:** you will begin rejecting transactions that
would not be valid under BIP113, which will prevent you from producing
invalid blocks if/when BIP113 is enforced on the network. Any
transactions which are valid under the current rules but not yet valid
under the BIP113 rules will either be mined by other miners or delayed
until they are valid under BIP113. Note, however, that time-based
locktime transactions are more or less unseen on the network currently.

**Implication for users:** GetMedianTimePast() always trails behind the
current time, so a transaction locktime set to the present time will be
rejected by nodes running this release until the median time moves
forward. To compensate, subtract one hour (3,600 seconds) from your
locktimes to allow those transactions to be included in mempools at
approximately the expected time.

[BIP113]: https://github.com/bitcoin/bips/blob/master/bip-0113.mediawiki

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.

0.11.2 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.

- #6124 `684636b` Make CScriptNum() take nMaxNumSize as an argument
- #6124 `4fa7a04` Replace NOP2 with CHECKLOCKTIMEVERIFY (BIP65)
- #6124 `6ea5ca4` Enable CHECKLOCKTIMEVERIFY as a standard script verify flag
- #6351 `5e82e1c` Add CHECKLOCKTIMEVERIFY (BIP65) soft-fork logic
- #6353 `ba1da90` Show softfork status in getblockchaininfo
- #6351 `6af25b0` Add BIP65 to getblockchaininfo softforks list
- #6688 `01878c9` Fix locking in GetTransaction
- #6653 `b3eaa30` [Qt] Raise debug window when requested
- #6600 `1e672ae` Debian/Ubuntu: Include bitcoin-tx binary
- #6600 `2394f4d` Debian/Ubuntu: Split bitcoin-tx into its own package
- #5987 `33d6825` Bugfix: Allow mining on top of old tip blocks for testnet
- #6852 `21e58b8` build: make sure OpenSSL heeds noexecstack
- #6846 `af6edac` alias `-h` for `--help`
- #6867 `95a5039` Set TCP_NODELAY on P2P sockets.
- #6856 `dfe55bd` Do not allow blockfile pruning during reindex.
- #6566 `a1d3c6f` Add rules--presently disabled--for using GetMedianTimePast as end point for lock-time calculations
- #6566 `f720c5f` Enable policy enforcing GetMedianTimePast as the end point of lock-time constraints
- #6917 `0af5b8e` leveldb: Win32WritableFile without memory mapping
- #6948 `4e895b0` Always flush block and undo when switching to new file

Credits
=======

Thanks to everyone who directly contributed to this release:

- Alex Morcos
- ฿tcDrak
- Chris Kleeschulte
- Daniel Cousens
- Diego Viola
- Eric Lombrozo
- Esteban Ordano
- Gregory Maxwell
- Luke Dashjr
- Marco Falke
- Mark Friedenbach
- 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](https://www.transifex.com/projects/p/bitcoin/).

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November 13, 2015, 12:29:16 PM
 #2

not on bitcoin.org yet, if it's not mandatory to upgrade i'll wait
OmegaStarScream
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November 13, 2015, 12:29:27 PM
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Good job for the developers , wondering how much it would like take us to reach at least bitcoin 1.0v with this speed of development progress

not on bitcoin.org yet, if it's not mandatory to upgrade i'll wait

and what is this ? https://bitcoin.org/bin/bitcoin-core-0.11.2/ , the fact that it got added here means that it will eventually get added on the download page .

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November 13, 2015, 01:16:32 PM
 #4

Looking at the latest 1001 blocks, I'm already seeing 200+ v4 blocks.
Carlton Banks
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November 13, 2015, 01:32:39 PM
 #5

not on bitcoin.org yet, if it's not mandatory to upgrade i'll wait

They always tend to wait about 24 hours while the github users who provide Gitian signatures for the build throw up their own personal signature for that release in the Bitcoin repo on github.

If that sounds like nonsense, they're essentially proving that the installation packages on bitcoin.org were built from the source code they're supposed to be from, by providing a signed copy of some verifiable aspect of the build output.

Not sure how reassuring all that it is if you can't build it yourself to compare, but I guess the idea is that all the devs who contribute signatures keep themselves in check. The alternative is that every single one of them is contributing sigs for a compromised build, which is always going to get discovered by some public user anyway. So it's like a chain of trust: if you know someone personally that does build Bitcoin themselves, that should add further reassurance if they can confirm the bitcoin.org downloads are good.

Edit: 0.11.2 is up on bitcoin.org/bin and bitcoin.org/en/download now

Vires in numeris
rupy
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November 13, 2015, 01:39:39 PM
 #6

When is pruning with wallet planned for?

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November 13, 2015, 02:05:05 PM
 #7

I think it's not mandatory to download this version. I don't want to change my Core in every update, it's updated too often.
Maybe next versions we have auto-update options built inside of the Core, just like Windows Updates.
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November 13, 2015, 02:11:20 PM
 #8

I think it's not mandatory to download this version. I don't want to change my Core in every update, it's updated too often.
Maybe next versions we have auto-update options built inside of the Core, just like Windows Updates.

That's not going to happen , not now and not ever probably . Because this means that someone will be controlling the network and this will be dangerous .
See here few words from one of the developers of Bitcoin Core : https://bitcointalk.org/index.php?topic=293824.msg3148582#msg3148582

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November 13, 2015, 02:18:44 PM
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When is pruning with wallet planned for?
0.12 which is planned for December
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November 13, 2015, 02:27:08 PM
 #10

I think it's not mandatory to download this version. I don't want to change my Core in every update, it's updated too often.
Maybe next versions we have auto-update options built inside of the Core, just like Windows Updates.

That's not going to happen , not now and not ever probably . Because this means that someone will be controlling the network and this will be dangerous .
See here few words from one of the developers of Bitcoin Core : https://bitcointalk.org/index.php?topic=293824.msg3148582#msg3148582

I mean built-in update button, not auto-update without having my permission. I know that would be dangerous.
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November 13, 2015, 02:40:03 PM
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I think it's not mandatory to download this version. I don't want to change my Core in every update, it's updated too often.
Maybe next versions we have auto-update options built inside of the Core, just like Windows Updates.

I would prefer to make that choice on my own. Can you imagine if someone push a malicious update and it get automatically updates to the majority, and they infect the whole

network? That would not be very smart... The updates has always been manual. The Windows bug fix is a good addition, because I have some friends, who said they struggled

with that.  Huh I am just glad the changes are less often, and not as often as Tor.  Roll Eyes

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November 13, 2015, 03:32:55 PM
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I would prefer to make that choice on my own. Can you imagine if someone push a malicious update and it get automatically updates to the majority, and they infect the whole network? That would not be very smart... The updates has always been manual.

Did you even read my previous post?
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November 13, 2015, 03:38:59 PM
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I would prefer to make that choice on my own. Can you imagine if someone push a malicious update and it get automatically updates to the majority, and they infect the whole network? That would not be very smart... The updates has always been manual.

Did you even read my previous post?

It's not going to happen, read OmegaStarScream's link.

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November 13, 2015, 03:53:49 PM
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LOL... I kept waiting for this version because it has the windows bug fix but couldn't wait any longer so I installed v.11.1 yesterday. My wallet is still at "17 weeks behind..."  I suppose it shouldn't matter if I close the wallet now and get this new version?   
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November 13, 2015, 03:56:52 PM
 #15

LOL... I kept waiting for this version because it has the windows bug fix but couldn't wait any longer so I installed v.11.1 yesterday. My wallet is still at "17 weeks behind..."  I suppose it shouldn't matter if I close the wallet now and get this new version?   

Nope, it will continue where you closed it.

Im not really here, its just your imagination.
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November 13, 2015, 03:57:16 PM
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LOL... I kept waiting for this version because it has the windows bug fix but couldn't wait any longer so I installed v.11.1 yesterday. My wallet is still at "17 weeks behind..."  I suppose it shouldn't matter if I close the wallet now and get this new version?  

Yeah, you don't have any problems. You can update it. Just in case something happens don't forget to backup your wallet.dat file.
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November 13, 2015, 04:36:34 PM
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Yes.  Thank you.  Smiley
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November 13, 2015, 05:33:37 PM
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I think it's not mandatory to download this version. I don't want to change my Core in every update, it's updated too often.
Maybe next versions we have auto-update options built inside of the Core, just like Windows Updates.

Yeah, what a hassle. Let's NOT update (because it only takes like 2 minutes) and get exposed to some bugs instead.
Cmon man just update the thing, it takes no time. It's not like you have to download the entire blockchain from scratch.
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November 13, 2015, 08:52:27 PM
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That windows bug has definitely been a PITA. Takes nearly 24 hours to reindex with the CPU fan screaming in my ear since I usually sleep with my laptop next to my head.

1D7FJWRzeKa4SLmTznd3JpeNU13L1ErEco
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November 13, 2015, 09:54:42 PM
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That windows bug has definitely been a PITA. Takes nearly 24 hours to reindex with the CPU fan screaming in my ear since I usually sleep with my laptop next to my head.

lol you must be very dedicated to Windows and Bitcoin. I often wonder if it'll take Windows 365 before people switch to something else.  Smiley

Vires in numeris
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