@ -3,71 +3,91 @@ release time)
@@ -3,71 +3,91 @@ release time)
Building this from
$ git shortlog --no-merges v0.7.0..
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 an
Ubuntu PPA version), 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.
Explanation of -detachdb (and the new "stop true" RPC command):
The Berkeley DB database library stores data in both ".dat" and
"log" files, so the database is always in a consistent state,
even in case of power failure or other sudden shutdown. The
format of the ".dat" files is portable between different
versions of Berkeley DB, but the "log" files are not-- even minor
version differences may have incompatible "log" files. The
-detachdb option moves any pending changes from the "log" files
to the "blkindex.dat" file for maximum compatibility, but makes
shutdown much slower. Note that the "wallet.dat" file is always
detached, and versions prior to 0.6.0 detached all databases
at shutdown.
New features
$ git shortlog --no-merges v0.7.1..
Incompatible Changes
--------------------
This release no longer maintains a full index of historical transaction ids
by default, so looking up an arbitrary transaction using the getrawtransaction
RPC call will not work. If you need that functionality, you must run once
with -txindex=1 -reindex=1 to rebuild block-chain indices (see below for more
details).
Improvements
------------
* Added a boolean argument to the RPC 'stop' command, if true sets
-detachdb to create standalone database .dat files before shutting down.
Mac and Windows binaries are signed with certificates owned by the Bitcoin
Foundation, to be compatible with the new security features in OSX 10.8 and
Windows 8.
* -salvagewallet command-line option, which moves any existing wallet.dat
to wallet.{timestamp}.dat and then attempts to salvage public/private
keys and master encryption keys (if the wallet is encrypted) into
a new wallet.dat. This should only be used if your wallet become s
corrupted, and is not intended to replace regular wallet backups .
LevelDB, a fast, open-source, non-relational database from Google, is
now used to store transaction and block indices. LevelDB works much better
on machines with slow I/O and is faster in general. Berkeley DB is now only
used for the wallet.dat file (public and private wallet keys and transactions
relevant to you).
* Import $DataDir/bootstrap.dat automatically, if it exists.
Pieter Wuille implemented many optimizations to the way transactions are
verified, so a running, synchronized node uses much less memory and does
much less I/O. He also implemented parallel signature checking, so if you
have a multi-CPU machine all CPUs will be used to verify transactions.
Dependency changes
------------------
New Features
------------
"Bloom filter" support in the network protocol for sending only relevant transactions to
lightweight clients.
contrib/verifysfbinaries is a shell-script to verify that the binary downloads
at sourceforge have not been tampered with. If you are able, you can help make
everybody's downloads more secure by running this occasionally to check PGP
signatures against download file checksums.
contrib/spendfrom is a python-language command-line utility that demonstrates
how to use the "raw transactions" JSON-RPC api to send coins received from particular
addresses (also known as "coin control").
* Qt 4.8.2 for Windows builds
New/changed settings (command-line or bitcoin.conf file)
--------------------------------------------------------
* openssl 1.0.1c
dbcache : now controls LevelDB memory usage. Running with (for example) -dbcache=1000
will use a gigabyte of memory and might make the initial blockchain download faster.
Bug fixes
---------
par : controls how many threads to use to validate transactions. Defaults to the number
of CPUs on your machine, use -par=1 to limit to a single CPU.
* When running -testnet, use RPC port 18332 by default.
txindex : maintains an extra index of old, spent transaction ids so they will be found
by the getrawtransaction JSON-RPC method.
* Better detection and handling of corrupt wallet.dat and blkindex.dat files.
Previous versions would crash with a DB_RUNRECOVERY exception, this
version detects most problems and tells you how to recover if it
cannot recover itself.
reindex : rebuild block and transaction indices from the downloaded block data.
* Fixed an uninitialized variable bug that could cause transactions to
be reported out of order.
New JSON-RPC API Features
-------------------------
* Fixed a bug that could cause occasional crashes on exit.
lockunspent / listlockunspent allow locking transaction outputs for a period of time so
they will not be spent by other processes that might be accessing the same wallet.
addnode / getaddednodeinfo methods, to connect to specific peers without restarting.
importprivkey now takes an optional boolean parameter (default true) to control whether
or not to rescan the blockchain for transactions after importing a new private key.
Important Bug Fixes
-------------------
Privacy leak: the position of the "change" output in most transactions was not being
properly randomized, making network analysis of the transaction graph to identify
users' wallets easier.
Zero-confirmation transaction vulnerability: accepting zero-confirmation transactions
(transactions that have not yet been included in a block) from somebody you do not
trust is still not recommended, because there will always be ways for attackers to
double-spend zero-confirmation transactions. However, this release includes a bug
fix that makes it a little bit more difficult for attackers to double-spend a
certain type ("lockTime in the future") of zero-confirmation transaction.
Dependency Changes
------------------
* Warn the user that they need to create fresh wallet backups after they
encrypt their wallet.
Qt 4.8.3 (compiling against older versions of Qt 4 should continue to work)
Gavin Andresen
12 years ago