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Bitcoin-Qt version 0.7.0 released

17 September 2012

Bitcoin-Qt version 0.7.0 is now available for download at:

We recommend that everybody running prior versions of bitcoind/Bitcoin-Qt upgrade to this release, except for users running Mac OSX 10.5.

Please report bugs using the issue tracker at github:

Project source code is hosted at github; you can get source-only tarballs/zipballs directly from there: # .tar.gz # .zip

Ubuntu Linux users can use the “Personal Package Archive” (PPA) maintained by Matt Corallo to automatically keep bitcoin up-to-date. Just type sudo apt-add-repository ppa:bitcoin/bitcoin sudo apt-get update in your terminal, then install the bitcoin-qt package: sudo apt-get install bitcoin-qt

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 were running on Linux with a version that might have been compiled with a different version of Berkeley DB (for example, if you were using the PPA and are switching to the binary release), then run the old version again with the -detachdb argument and shut it down; if you do not, then the new version will not be able to read the database files and will exit with an error.

Incompatible Changes

  • Replaced the getmemorypool RPC command with getblocktemplate/submitblock and getrawmempool commands.
  • Remove deprecated RPC getblocknumber

Bitcoin Improvement Proposals implemented

BIP 22 - getblocktemplate, submitblock RPCs BIP 34 - block version 2, height in coinbase BIP 35 - mempool message, extended getdata message behavior

Core bitcoin handling and blockchain database

  • Reduced CPU usage, by eliminating some redundant hash calculations
  • Cache signature verifications, to eliminate redundant signature checks
  • Transactions with zero-value outputs are considered non-standard
  • Mining: when creating new blocks, sort ‘paid’ area by fee-per-kb
  • Database: better validation of on-disk stored data
  • Database: minor optimizations and reliability improvements
  • -loadblock=FILE will import an external block file
  • Additional DoS (denial-of-service) prevention measures
  • New blockchain checkpoint at block 193,000


  • Internal HTTP server is now thread-per-connection, rather than a single-threaded queue that would stall on network I/O.
  • Internal HTTP server supports HTTP/1.1, pipelined requests and connection keep-alive.
  • Support JSON-RPC 2.0 batches, to encapsulate multiple JSON-RPC requests within a single HTTP request.
  • IPv6 support
  • Added raw transaction API. See
  • Added getrawmempool, to list contents of TX memory pool
  • Added getpeerinfo, to list data about each connected network peer
  • Added listaddressgroupings for better coin control
  • Rework getblock call.
  • Remove deprecated RPC getblocknumber
  • Remove superceded RPC getmemorypool (see BIP 22, above)
  • listtransactions output now displays “smart” times for transactions, and blocktime and timereceived fields were added

P2P networking

  • IPv6 support
  • Tor hidden service support (see doc/Tor.txt)
  • Attempts to fix “stuck blockchain download” problems
  • Replace BDB database “addr.dat” with internally-managed “peers.dat” file containing peer address data.
  • Lower default send buffer from 10MB to 1MB
  • proxy: SOCKS5 by default
  • Support connecting by hostnames passed to proxy
  • Add -seednode connections, and use this instead of DNS seeds when proxied
  • Added -externalip and -discover
  • Add -onlynet to connect only to a given network (IPv4, IPv6, or Tor)
  • Separate listening sockets, -bind=<addr>


  • Add UI RPC console / debug window
  • Re-Enable URI handling on Windows, add safety checks and tray-notifications
  • Harmonize the use of ellipsis (“…”) to be used in menus, but not on buttons
  • Add 2 labels to the overviewpage that display Wallet and Transaction status (obsolete or current)
  • Extend the optionsdialog (e.g. language selection) and re-work it to a tabbed UI
  • Merge sign/verify message into a single window with tabbed UI
  • Ensure a changed bitcoin unit immediately updates all GUI elements that use units
  • Update QR Code dialog
  • Improve error reporting at startup
  • Fine-grained UI updates for a much smoother UI during block downloads
  • Remove autocorrection of 0/i in addresses in UI
  • Reorganize tray icon menu into more logical order
  • Persistently poll for balance change when number of blocks changed
  • Much better translations
  • Override progress bar design on platforms with segmented progress bars to assist with readability
  • Added ‘immature balance’ display on the overview page
  • (Windows only): enable ASLR and DEP for bitcoin-qt.exe
  • (Windows only): add meta-data to bitcoin-qt.exe (e.g. description)

Internal codebase

  • Additional unit tests
  • Compile warning fixes


  • Reopen debug.log upon SIGHUP
  • Bash programmable completion for bitcoind(1)
  • On supported OS’s, each thread is given a useful name
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