git / moonbite-core / doc/release-notes/release-notes-0.8.0.md · raw

Bitcoin-Qt version 0.8.0 is now available from:  http://sourceforge.net/projects/bitcoin/files/Bitcoin/bitcoin-0.8.0/This is a major release designed to improve performance and handle theincreasing volume of transactions on the network.Please report bugs using the issue tracker at github:  https://github.com/bitcoin/bitcoin/issuesHow to Upgrade--------------If you are running an older version, shut it down. Waituntil it has completely shut down (which might take a few minutes for olderversions), then run the installer (on Windows) or just copy over/Applications/Bitcoin-Qt (on Mac) or bitcoind/bitcoin-qt (on Linux).The first time you run after the upgrade a re-indexing process will bestarted that will take anywhere from 30 minutes to several hours,depending on the speed of your machine.Incompatible Changes--------------------This release no longer maintains a full index of historical transaction idsby default, so looking up an arbitrary transaction using the getrawtransactionRPC call will not work. If you need that functionality, you must run oncewith -txindex=1 -reindex=1 to rebuild block-chain indices (see below for moredetails).Improvements------------Mac and Windows binaries are signed with certificates owned by the BitcoinFoundation, to be compatible with the new security features in OSX 10.8 andWindows 8.LevelDB, a fast, open-source, non-relational database from Google, isnow used to store transaction and block indices.  LevelDB works much betteron machines with slow I/O and is faster in general. Berkeley DB is now onlyused for the wallet.dat file (public and private wallet keys and transactionsrelevant to you).Pieter Wuille implemented many optimizations to the way transactions areverified, so a running, synchronized node uses less working memory and doesmuch less I/O. He also implemented parallel signature checking, so if youhave a multi-CPU machine all CPUs will be used to verify transactions.New Features------------"Bloom filter" support in the network protocol for sending only relevant transactions tolightweight clients.contrib/verifysfbinaries is a shell-script to verify that the binary downloadsat sourceforge have not been tampered with. If you are able, you can help makeeverybody's downloads more secure by running this occasionally to check PGPsignatures against download file checksums.contrib/spendfrom is a python-language command-line utility that demonstrateshow to use the "raw transactions" JSON-RPC api to send coins received from particularaddresses (also known as "coin control").New/changed settings (command-line or bitcoin.conf file)--------------------------------------------------------dbcache : controls LevelDB memory usage.par : controls how many threads to use to validate transactions. Defaults to the numberof CPUs on your machine, use -par=1 to limit to a single CPU.txindex : maintains an extra index of old, spent transaction ids so they will be foundby the getrawtransaction JSON-RPC method.reindex : rebuild block and transaction indices from the downloaded block data.New JSON-RPC API Features-------------------------lockunspent / listlockunspent allow locking transaction outputs for a period of time sothey 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 whetheror 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 beingproperly randomized, making network analysis of the transaction graph to identifyusers' wallets easier. Zero-confirmation transaction vulnerability: accepting zero-confirmation transactions(transactions that have not yet been included in a block) from somebody you do nottrust is still not recommended, because there will always be ways for attackers todouble-spend zero-confirmation transactions. However, this release includes a bugfix that makes it a little bit more difficult for attackers to double-spend acertain type ("lockTime in the future") of zero-confirmation transaction.Dependency Changes------------------Qt 4.8.3 (compiling against older versions of Qt 4 should continue to work)Thanks to everybody who contributed to this release:----------------------------------------------------Alexander KjeldaasAndrey AlekseenkoArnav SinghChristian von RoquesEric LombrozoForrest VoightGavin AndresenGregory MaxwellJeff GarzikLuke DashjrMatt CoralloMike CassanoMike HearnPeter ToddPhilip KaufmannPieter WuilleRichard SchwabRobert BackhausRune K. SvendsenSergio Demian LernerWladimir J. van der Laanburger2defaultfanquakegrimd34thjustmoonredshark1802tucenaberxanatos