Bitcoin Core 0.9.2
==================

Bitcoin Core version 0.9.2 is now available from:

  <https://bitcoin.org/bin/0.9.2/>

This is a new minor version release, bringing mostly bug fixes and some minor
improvements. OpenSSL has been updated because of a security issue (CVE-2014-0224).
Upgrading to this release is recommended.

Please report bugs using the issue tracker at github:

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

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).

If you are upgrading from version 0.7.2 or earlier, the first time you run
0.9.2 your blockchain files will be re-indexed, which will take anywhere from
30 minutes to several hours, depending on the speed of your machine.

Downgrading warnings
--------------------

The 'chainstate' for this release is not always compatible with previous
releases, so if you run 0.9.x and then decide to switch back to a
0.8.x release you might get a blockchain validation error when starting the
old release (due to 'pruned outputs' being omitted from the index of
unspent transaction outputs).

Running the old release with the -reindex option will rebuild the chainstate
data structures and correct the problem.

Also, the first time you run a 0.8.x release on a 0.9 wallet it will rescan
the blockchain for missing spent coins, which will take a long time (tens
of minutes on a typical machine).

Important changes
-----------------

### Gitian OSX build

The deterministic build system that was already used for Windows and Linux
builds is now used for OSX as well. Although the resulting executables have
been tested quite a bit, there could be possible regressions. Be sure to report
these on the Github bug tracker mentioned above.

### Compatibility of Linux build

For Linux we now build against Qt 4.6, and filter the symbols for libstdc++ and glibc.
This brings back compatibility with

- Debian 6+ / Tails
- Ubuntu 10.04
- CentOS 6.5

0.9.2 Release notes
-------------------

The OpenSSL dependency in the gitian builds has been upgraded to 1.0.1h because of CVE-2014-0224.

### RPC

- Add `getwalletinfo`, `getblockchaininfo` and `getnetworkinfo` calls (will replace hodge-podge `getinfo` at some point)
- Add a `relayfee` field to `getnetworkinfo`
- Fix RPC related shutdown hangs and leaks
- Always show syncnode in `getpeerinfo`
- `sendrawtransaction`: report the reject code and reason, and make it possible to re-send transactions that are already in the mempool
- `getmininginfo` show right genproclimit

### Command-line options

- Fix `-printblocktree` output
- Show error message if ReadConfigFile fails

### Block-chain handling and storage

- Fix for GetBlockValue() after block 13,440,000 (BIP42)
- Upgrade leveldb to 1.17

### Protocol and network code

- Per-peer block download tracking and stalled download detection
- Add new DNS seed from bitnodes.io
- Prevent socket leak in ThreadSocketHandler and correct some proxy related socket leaks
- Use pnode->nLastRecv as sync score (was the wrong way around)

### Wallet

- Make GetAvailableCredit run GetHash() only once per transaction (performance improvement)
- Lower paytxfee warning threshold from 0.25 BTC to 0.01 BTC
- Fix importwallet nTimeFirstKey (trigger necessary rescans)
- Log BerkeleyDB version at startup
- CWallet init fix

### Build system

- Add OSX build descriptors to gitian
- Fix explicit --disable-qt-dbus
- Don't require db_cxx.h when compiling with wallet disabled and GUI enabled
- Improve missing boost error reporting
- Upgrade miniupnpc version to 1.9
- gitian-linux: --enable-glibc-back-compat for binary compatibility with old distributions
- gitian: don't export any symbols from executable
- gitian: build against Qt 4.6
- devtools: add script to check symbols from Linux gitian executables
- Remove build-time no-IPv6 setting

### GUI

- Fix various coin control visual issues
- Show number of in/out connections in debug console
- Show weeks as well as years behind for long timespans behind
- Enable and disable the Show and Remove buttons for requested payments history based on whether any entry is selected.
- Show also value for options overridden on command line in options dialog
- Fill in label from address book also for URIs
- Fixes feel when resizing the last column on tables (issue #2862)
- Fix ESC in disablewallet mode
- Add expert section to wallet tab in optionsdialog
- Do proper boost::path conversion (fixes unicode in datadir)
- Only override -datadir if different from the default (fixes -datadir in config file)
- Show rescan progress at start-up
- Show importwallet progress
- Get required locks upfront in polling functions (avoids hanging on locks)
- Catch Windows shutdown events while client is running
- Optionally add third party links to transaction context menu
- Check for !pixmap() before trying to export QR code (avoids crashes when no QR code could be generated)
- Fix "Start bitcoin on system login"

### Miscellaneous

- Replace non-threadsafe C functions (gmtime, strerror and setlocale)
- Add missing cs_main and wallet locks
- Avoid exception at startup when system locale not recognized
- Changed bitrpc.py's raw_input to getpass for passwords to conceal characters during command line input
- devtools: add a script to fetch and postprocess translations

Credits
-------

Thanks to everyone who contributed to this release:

- Addy Yeow
- Altoidnerd
- Andrea D'Amore
- Andreas Schildbach
- Bardi Harborow
- Brandon Dahler
- Bryan Bishop
- Chris Beams
- Christian von Roques
- Cory Fields
- Cozz Lovan
- daniel
- Daniel Newton
- David A. Harding
- ditto-b
- duanemoody
- Eric S. Bullington
- Fabian Raetz
- Gavin Andresen
- Gregory Maxwell
- gubatron
- Haakon Nilsen
- harry
- Hector Jusforgues
- Isidoro Ghezzi
- Jeff Garzik
- Johnathan Corgan
- jtimon
- Kamil Domanski
- langerhans
- Luke Dashjr
- Manuel Araoz
- Mark Friedenbach
- Matt Corallo
- Matthew Bogosian
- Meeh
- Michael Ford
- Michagogo
- Mikael Wikman
- Mike Hearn
- olalonde
- paveljanik
- peryaudo
- Philip Kaufmann
- philsong
- Pieter Wuille
- R E Broadley
- richierichrawr
- Rune K. Svendsen
- rxl
- shshshsh
- Simon de la Rouviere
- Stuart Cardall
- super3
- Telepatheic
- Thomas Zander
- Torstein Husebø
- Warren Togami
- Wladimir J. van der Laan
- Yoichi Hirai
