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Diffstat (limited to 'doc/release-notes')
| -rw-r--r-- | doc/release-notes/release-notes-0.10.4.md | 172 | ||||
| -rw-r--r-- | doc/release-notes/release-notes-0.11.2.md | 217 | ||||
| -rw-r--r-- | doc/release-notes/release-notes-0.12.0.md | 890 |
3 files changed, 1279 insertions, 0 deletions
diff --git a/doc/release-notes/release-notes-0.10.4.md b/doc/release-notes/release-notes-0.10.4.md new file mode 100644 index 0000000000..38a2c1347d --- /dev/null +++ b/doc/release-notes/release-notes-0.10.4.md @@ -0,0 +1,172 @@ +Bitcoin Core version 0.10.4 is now available from: + + <https://bitcoin.org/bin/bitcoin-core-0.10.4/> + +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 0.10.3 +============================ + +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 FIXME or any version from FIXME 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 + +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. + +0.10.4 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. + +- #6953 `8b3311f` alias -h for --help +- #6953 `97546fc` Change URLs to https in debian/control +- #6953 `38671bf` Update debian/changelog and slight tweak to debian/control +- #6953 `256321e` Correct spelling mistakes in doc folder +- #6953 `eae0350` Clarification of unit test build instructions +- #6953 `90897ab` Update bluematt-key, the old one is long-since revoked +- #6953 `a2f2fb6` build: disable -Wself-assign +- #6953 `cf67d8b` Bugfix: Allow mining on top of old tip blocks for testnet (fixes testnet-in-a-box use case) +- #6953 `b3964e3` Drop "with minimal dependencies" from description +- #6953 `43c2789` Split bitcoin-tx into its own package +- #6953 `dfe0d4d` Include bitcoin-tx binary on Debian/Ubuntu +- #6953 `612efe8` [Qt] Raise debug window when requested +- #6953 `3ad96bd` Fix locking in GetTransaction +- #6953 `9c81005` Fix spelling of Qt +- #6946 `94b67e5` Update LevelDB +- #6706 `5dc72f8` CLTV: Add more tests to improve coverage +- #6706 `6a1343b` Add RPC tests for the CHECKLOCKTIMEVERIFY (BIP65) soft-fork +- #6706 `4137248` Add CHECKLOCKTIMEVERIFY (BIP65) soft-fork logic +- #6706 `0e01d0f` Enable CHECKLOCKTIMEVERIFY as a standard script verify flag +- #6706 `6d01325` Replace NOP2 with CHECKLOCKTIMEVERIFY (BIP65) +- #6706 `750d54f` Move LOCKTIME_THRESHOLD to src/script/script.h +- #6706 `6897468` Make CScriptNum() take nMaxNumSize as an argument +- #6867 `5297194` Set TCP_NODELAY on P2P sockets +- #6836 `fb818b6` Bring historical release notes up to date +- #6852 `0b3fd07` build: make sure OpenSSL heeds noexecstack + +Credits +======= + +Thanks to everyone who directly contributed to this release: + +- Alex Morcos +- Daniel Cousens +- Diego Viola +- Eric Lombrozo +- Esteban Ordano +- Gregory Maxwell +- Luke Dashjr +- MarcoFalke +- 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/). diff --git a/doc/release-notes/release-notes-0.11.2.md b/doc/release-notes/release-notes-0.11.2.md new file mode 100644 index 0000000000..2351b80656 --- /dev/null +++ b/doc/release-notes/release-notes-0.11.2.md @@ -0,0 +1,217 @@ +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/). diff --git a/doc/release-notes/release-notes-0.12.0.md b/doc/release-notes/release-notes-0.12.0.md new file mode 100644 index 0000000000..b586d754f0 --- /dev/null +++ b/doc/release-notes/release-notes-0.12.0.md @@ -0,0 +1,890 @@ +Bitcoin Core version 0.12.0 is now available from: + + <https://bitcoin.org/bin/bitcoin-core-0.12.0/> + +This is a new major version release, bringing new features and other improvements. + +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 +----------------- + +### Downgrade to a version < 0.10.0 + +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. + +### Downgrade to a version < 0.12.0 + +Because release 0.12.0 and later will obfuscate the chainstate on every +fresh sync or reindex, the chainstate is not backwards-compatible with +pre-0.12 versions of Bitcoin Core or other software. + +If you want to downgrade after you have done a reindex with 0.12.0 or later, +you will need to reindex when you first start Bitcoin Core version 0.11 or +earlier. + +Notable changes +=============== + +Signature validation using libsecp256k1 +--------------------------------------- + +ECDSA signatures inside Bitcoin transactions now use validation using +[libsecp256k1](https://github.com/bitcoin/secp256k1) instead of OpenSSL. + +Depending on the platform, this means a significant speedup for raw signature +validation speed. The advantage is largest on x86_64, where validation is over +five times faster. In practice, this translates to a raw reindexing and new +block validation times that are less than half of what it was before. + +Libsecp256k1 has undergone very extensive testing and validation. + +A side effect of this change is that libconsensus no longer depends on OpenSSL. + +Reduce upload traffic +--------------------- + +A major part of the outbound traffic is caused by serving historic blocks to +other nodes in initial block download state. + +It is now possible to reduce the total upload traffic via the `-maxuploadtarget` +parameter. This is *not* a hard limit but a threshold to minimize the outbound +traffic. When the limit is about to be reached, the uploaded data is cut by not +serving historic blocks (blocks older than one week). +Moreover, any SPV peer is disconnected when they request a filtered block. + +This option can be specified in MiB per day and is turned off by default +(`-maxuploadtarget=0`). +The recommended minimum is 144 * MAX_BLOCK_SIZE (currently 144MB) per day. + +Whitelisted peers will never be disconnected, although their traffic counts for +calculating the target. + +A more detailed documentation about keeping traffic low can be found in +[/doc/reduce-traffic.md](/doc/reduce-traffic.md). + +Direct headers announcement (BIP 130) +------------------------------------- + +Between compatible peers, [BIP 130] +(https://github.com/bitcoin/bips/blob/master/bip-0130.mediawiki) +direct headers announcement is used. This means that blocks are advertized by +announcing their headers directly, instead of just announcing the hash. In a +reorganization, all new headers are sent, instead of just the new tip. This +can often prevent an extra roundtrip before the actual block is downloaded. + +With this change, pruning nodes are now able to relay new blocks to compatible +peers. + +Memory pool limiting +-------------------- + +Previous versions of Bitcoin Core had their mempool limited by checking +a transaction's fees against the node's minimum relay fee. There was no +upper bound on the size of the mempool and attackers could send a large +number of transactions paying just slighly more than the default minimum +relay fee to crash nodes with relatively low RAM. A temporary workaround +for previous versions of Bitcoin Core was to raise the default minimum +relay fee. + +Bitcoin Core 0.12 will have a strict maximum size on the mempool. The +default value is 300 MB and can be configured with the `-maxmempool` +parameter. Whenever a transaction would cause the mempool to exceed +its maximum size, the transaction that (along with in-mempool descendants) has +the lowest total feerate (as a package) will be evicted and the node's effective +minimum relay feerate will be increased to match this feerate plus the initial +minimum relay feerate. The initial minimum relay feerate is set to +1000 satoshis per kB. + +Bitcoin Core 0.12 also introduces new default policy limits on the length and +size of unconfirmed transaction chains that are allowed in the mempool +(generally limiting the length of unconfirmed chains to 25 transactions, with a +total size of 101 KB). These limits can be overriden using command line +arguments; see the extended help (`--help -help-debug`) for more information. + +Opt-in Replace-by-fee transactions +---------------------------------- + +It is now possible to replace transactions in the transaction memory pool of +Bitcoin Core 0.12 nodes. Bitcoin Core will only allow replacement of +transactions which have any of their inputs' `nSequence` number set to less +than `0xffffffff - 1`. Moreover, a replacement transaction may only be +accepted when it pays sufficient fee, as described in [BIP 125] +(https://github.com/bitcoin/bips/blob/master/bip-0125.mediawiki). + +Transaction replacement can be disabled with a new command line option, +`-mempoolreplacement=0`. Transactions signaling replacement under BIP125 will +still be allowed into the mempool in this configuration, but replacements will +be rejected. This option is intended for miners who want to continue the +transaction selection behavior of previous releases. + +The `-mempoolreplacement` option is *not recommended* for wallet users seeking +to avoid receipt of unconfirmed opt-in transactions, because this option does +not prevent transactions which are replaceable under BIP 125 from being accepted +(only subsequent replacements, which other nodes on the network that implement +BIP 125 are likely to relay and mine). Wallet users wishing to detect whether +a transaction is subject to replacement under BIP 125 should instead use the +updated RPC calls `gettransaction` and `listtransactions`, which now have an +additional field in the output indicating if a transaction is replaceable under +BIP125 ("bip125-replaceable"). + +Note that the wallet in Bitcoin Core 0.12 does not yet have support for +creating transactions that would be replaceable under BIP 125. + + +RPC: Random-cookie RPC authentication +------------------------------------- + +When no `-rpcpassword` is specified, the daemon now uses a special 'cookie' +file for authentication. This file is generated with random content when the +daemon starts, and deleted when it exits. Its contents are used as +authentication token. Read access to this file controls who can access through +RPC. By default it is stored in the data directory but its location can be +overridden with the option `-rpccookiefile`. + +This is similar to Tor's CookieAuthentication: see +https://www.torproject.org/docs/tor-manual.html.en + +This allows running bitcoind without having to do any manual configuration. + +Relay: Any sequence of pushdatas in OP_RETURN outputs now allowed +----------------------------------------------------------------- + +Previously OP_RETURN outputs with a payload were only relayed and mined if they +had a single pushdata. This restriction has been lifted to allow any +combination of data pushes and numeric constant opcodes (OP_1 to OP_16) after +the OP_RETURN. The limit on OP_RETURN output size is now applied to the entire +serialized scriptPubKey, 83 bytes by default. (the previous 80 byte default plus +three bytes overhead) + +Relay and Mining: Priority transactions +--------------------------------------- + +Bitcoin Core has a heuristic 'priority' based on coin value and age. This +calculation is used for relaying of transactions which do not pay the +minimum relay fee, and can be used as an alternative way of sorting +transactions for mined blocks. Bitcoin Core will relay transactions with +insufficient fees depending on the setting of `-limitfreerelay=<r>` (default: +`r=15` kB per minute) and `-blockprioritysize=<s>`. + +In Bitcoin Core 0.12, when mempool limit has been reached a higher minimum +relay fee takes effect to limit memory usage. Transactions which do not meet +this higher effective minimum relay fee will not be relayed or mined even if +they rank highly according to the priority heuristic. + +The mining of transactions based on their priority is also now disabled by +default. To re-enable it, simply set `-blockprioritysize=<n>` where is the size +in bytes of your blocks to reserve for these transactions. The old default was +50k, so to retain approximately the same policy, you would set +`-blockprioritysize=50000`. + +Additionally, as a result of computational simplifications, the priority value +used for transactions received with unconfirmed inputs is lower than in prior +versions due to avoiding recomputing the amounts as input transactions confirm. + +External miner policy set via the `prioritisetransaction` RPC to rank +transactions already in the mempool continues to work as it has previously. +Note, however, that if mining priority transactions is left disabled, the +priority delta will be ignored and only the fee metric will be effective. + +This internal automatic prioritization handling is being considered for removal +entirely in Bitcoin Core 0.13, and it is at this time undecided whether the +more accurate priority calculation for chained unconfirmed transactions will be +restored. Community direction on this topic is particularly requested to help +set project priorities. + +Automatically use Tor hidden services +------------------------------------- + +Starting with Tor version 0.2.7.1 it is possible, through Tor's control socket +API, to create and destroy 'ephemeral' hidden services programmatically. +Bitcoin Core has been updated to make use of this. + +This means that if Tor is running (and proper authorization is available), +Bitcoin Core automatically creates a hidden service to listen on, without +manual configuration. Bitcoin Core will also use Tor automatically to connect +to other .onion nodes if the control socket can be successfully opened. This +will positively affect the number of available .onion nodes and their usage. + +This new feature is enabled by default if Bitcoin Core is listening, and +a connection to Tor can be made. It can be configured with the `-listenonion`, +`-torcontrol` and `-torpassword` settings. To show verbose debugging +information, pass `-debug=tor`. + +Notifications through ZMQ +------------------------- + +Bitcoind can now (optionally) asynchronously notify clients through a +ZMQ-based PUB socket of the arrival of new transactions and blocks. +This feature requires installation of the ZMQ C API library 4.x and +configuring its use through the command line or configuration file. +Please see [docs/zmq.md](/doc/zmq.md) for details of operation. + +Wallet: Transaction fees +------------------------ + +Various improvements have been made to how the wallet calculates +transaction fees. + +Users can decide to pay a predefined fee rate by setting `-paytxfee=<n>` +(or `settxfee <n>` rpc during runtime). A value of `n=0` signals Bitcoin +Core to use floating fees. By default, Bitcoin Core will use floating +fees. + +Based on past transaction data, floating fees approximate the fees +required to get into the `m`th block from now. This is configurable +with `-txconfirmtarget=<m>` (default: `2`). + +Sometimes, it is not possible to give good estimates, or an estimate +at all. Therefore, a fallback value can be set with `-fallbackfee=<f>` +(default: `0.0002` BTC/kB). + +At all times, Bitcoin Core will cap fees at `-maxtxfee=<x>` (default: +0.10) BTC. +Furthermore, Bitcoin Core will never create transactions smaller than +the current minimum relay fee. +Finally, a user can set the minimum fee rate for all transactions with +`-mintxfee=<i>`, which defaults to 1000 satoshis per kB. + +Wallet: Negative confirmations and conflict detection +----------------------------------------------------- + +The wallet will now report a negative number for confirmations that indicates +how deep in the block chain the conflict is found. For example, if a transaction +A has 5 confirmations and spends the same input as a wallet transaction B, B +will be reported as having -5 confirmations. If another wallet transaction C +spends an output from B, it will also be reported as having -5 confirmations. +To detect conflicts with historical transactions in the chain a one-time +`-rescan` may be needed. + +Unlike earlier versions, unconfirmed but non-conflicting transactions will never +get a negative confirmation count. They are not treated as spendable unless +they're coming from ourself (change) and accepted into our local mempool, +however. The new "trusted" field in the `listtransactions` RPC output +indicates whether outputs of an unconfirmed transaction are considered +spendable. + +Wallet: Merkle branches removed +------------------------------- + +Previously, every wallet transaction stored a Merkle branch to prove its +presence in blocks. This wasn't being used for more than an expensive +sanity check. Since 0.12, these are no longer stored. When loading a +0.12 wallet into an older version, it will automatically rescan to avoid +failed checks. + +Wallet: Pruning +--------------- + +With 0.12 it is possible to use wallet functionality in pruned mode. +This can reduce the disk usage from currently around 60 GB to +around 2 GB. + +However, rescans as well as the RPCs `importwallet`, `importaddress`, +`importprivkey` are disabled. + +To enable block pruning set `prune=<N>` on the command line or in +`bitcoin.conf`, where `N` is the number of MiB to allot for +raw block & undo data. + +A value of 0 disables pruning. The minimal value above 0 is 550. Your +wallet is as secure with high values as it is with low ones. Higher +values merely ensure that your node will not shut down upon blockchain +reorganizations of more than 2 days - which are unlikely to happen in +practice. In future releases, a higher value may also help the network +as a whole: stored blocks could be served to other nodes. + +For further information about pruning, you may also consult the [release +notes of v0.11.0](https://github.com/bitcoin/bitcoin/blob/v0.11.0/doc/release-notes.md#block-file-pruning). + +`NODE_BLOOM` service bit +------------------------ + +Support for the `NODE_BLOOM` service bit, as described in [BIP +111](https://github.com/bitcoin/bips/blob/master/bip-0111.mediawiki), has been +added to the P2P protocol code. + +BIP 111 defines a service bit to allow peers to advertise that they support +bloom filters (such as used by SPV clients) explicitly. It also bumps the protocol +version to allow peers to identify old nodes which allow bloom filtering of the +connection despite lacking the new service bit. + +In this version, it is only enforced for peers that send protocol versions +`>=70011`. For the next major version it is planned that this restriction will be +removed. It is recommended to update SPV clients to check for the `NODE_BLOOM` +service bit for nodes that report versions newer than 70011. + +Option parsing behavior +----------------------- + +Command line options are now parsed strictly in the order in which they are +specified. It used to be the case that `-X -noX` ends up, unintuitively, with X +set, as `-X` had precedence over `-noX`. This is no longer the case. Like for +other software, the last specified value for an option will hold. + +RPC: Low-level API changes +-------------------------- + +- Monetary amounts can be provided as strings. This means that for example the + argument to sendtoaddress can be "0.0001" instead of 0.0001. This can be an + advantage if a JSON library insists on using a lossy floating point type for + numbers, which would be dangerous for monetary amounts. + +* The `asm` property of each scriptSig now contains the decoded signature hash + type for each signature that provides a valid defined hash type. + +* OP_NOP2 has been renamed to OP_CHECKLOCKTIMEVERIFY by [BIP 65](https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki) + +The following items contain assembly representations of scriptSig signatures +and are affected by this change: + +- RPC `getrawtransaction` +- RPC `decoderawtransaction` +- RPC `decodescript` +- REST `/rest/tx/` (JSON format) +- REST `/rest/block/` (JSON format when including extended tx details) +- `bitcoin-tx -json` + +For example, the `scriptSig.asm` property of a transaction input that +previously showed an assembly representation of: + + 304502207fa7a6d1e0ee81132a269ad84e68d695483745cde8b541e3bf630749894e342a022100c1f7ab20e13e22fb95281a870f3dcf38d782e53023ee313d741ad0cfbc0c509001 400000 OP_NOP2 + +now shows as: + + 304502207fa7a6d1e0ee81132a269ad84e68d695483745cde8b541e3bf630749894e342a022100c1f7ab20e13e22fb95281a870f3dcf38d782e53023ee313d741ad0cfbc0c5090[ALL] 400000 OP_CHECKLOCKTIMEVERIFY + +Note that the output of the RPC `decodescript` did not change because it is +configured specifically to process scriptPubKey and not scriptSig scripts. + +RPC: SSL support dropped +------------------------ + +SSL support for RPC, previously enabled by the option `rpcssl` has been dropped +from both the client and the server. This was done in preparation for removing +the dependency on OpenSSL for the daemon completely. + +Trying to use `rpcssl` will result in an error: + + Error: SSL mode for RPC (-rpcssl) is no longer supported. + +If you are one of the few people that relies on this feature, a flexible +migration path is to use `stunnel`. This is an utility that can tunnel +arbitrary TCP connections inside SSL. On e.g. Ubuntu it can be installed with: + + sudo apt-get install stunnel4 + +Then, to tunnel a SSL connection on 28332 to a RPC server bound on localhost on port 18332 do: + + stunnel -d 28332 -r 127.0.0.1:18332 -p stunnel.pem -P '' + +It can also be set up system-wide in inetd style. + +Another way to re-attain SSL would be to setup a httpd reverse proxy. This solution +would allow the use of different authentication, loadbalancing, on-the-fly compression and +caching. A sample config for apache2 could look like: + + Listen 443 + + NameVirtualHost *:443 + <VirtualHost *:443> + + SSLEngine On + SSLCertificateFile /etc/apache2/ssl/server.crt + SSLCertificateKeyFile /etc/apache2/ssl/server.key + + <Location /bitcoinrpc> + ProxyPass http://127.0.0.1:8332/ + ProxyPassReverse http://127.0.0.1:8332/ + # optional enable digest auth + # AuthType Digest + # ... + + # optional bypass bitcoind rpc basic auth + # RequestHeader set Authorization "Basic <hash>" + # get the <hash> from the shell with: base64 <<< bitcoinrpc:<password> + </Location> + + # Or, balance the load: + # ProxyPass / balancer://balancer_cluster_name + + </VirtualHost> + +Mining Code Changes +------------------- + +The mining code in 0.12 has been optimized to be significantly faster and use less +memory. As part of these changes, consensus critical calculations are cached on a +transaction's acceptance into the mempool and the mining code now relies on the +consistency of the mempool to assemble blocks. However all blocks are still tested +for validity after assembly. + +Other P2P Changes +----------------- + +The list of banned peers is now stored on disk rather than in memory. +Restarting bitcoind will no longer clear out the list of banned peers; instead +a new RPC call (`clearbanned`) can be used to manually clear the list. The new +`setban` RPC call can also be used to manually ban or unban a peer. + +0.12.0 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. + +### RPC and REST + +- #6121 `466f0ea` Convert entire source tree from json_spirit to UniValue (Jonas Schnelli) +- #6234 `d38cd47` fix rpcmining/getblocktemplate univalue transition logic error (Jonas Schnelli) +- #6239 `643114f` Don't go through double in AmountFromValue and ValueFromAmount (Wladimir J. van der Laan) +- #6266 `ebab5d3` Fix univalue handling of \u0000 characters. (Daniel Kraft) +- #6276 `f3d4dbb` Fix getbalance * 0 (Tom Harding) +- #6257 `5ebe7db` Add `paytxfee` and `errors` JSON fields where appropriate (Stephen) +- #6271 `754aae5` New RPC command disconnectnode (Alex van der Peet) +- #6158 `0abfa8a` Add setban/listbanned RPC commands (Jonas Schnelli) +- #6307 `7ecdcd9` rpcban fixes (Jonas Schnelli) +- #6290 `5753988` rpc: make `gettxoutsettinfo` run lock-free (Wladimir J. van der Laan) +- #6262 `247b914` Return all available information via RPC call "validateaddress" (dexX7) +- #6339 `c3f0490` UniValue: don't escape solidus, keep espacing of reverse solidus (Jonas Schnelli) +- #6353 `6bcb0a2` Show softfork status in getblockchaininfo (Wladimir J. van der Laan) +- #6247 `726e286` Add getblockheader RPC call (Peter Todd) +- #6362 `d6db115` Fix null id in RPC response during startup (Forrest Voight) +- #5486 `943b322` [REST] JSON support for /rest/headers (Jonas Schnelli) +- #6379 `c52e8b3` rpc: Accept scientific notation for monetary amounts in JSON (Wladimir J. van der Laan) +- #6388 `fd5dfda` rpc: Implement random-cookie based authentication (Wladimir J. van der Laan) +- #6457 `3c923e8` Include pruned state in chaininfo.json (Simon Males) +- #6456 `bfd807f` rpc: Avoid unnecessary parsing roundtrip in number formatting, fix locale issue (Wladimir J. van der Laan) +- #6380 `240b30e` rpc: Accept strings in AmountFromValue (Wladimir J. van der Laan) +- #6346 `6bb2805` Add OP_RETURN support in createrawtransaction RPC call, add tests. (paveljanik) +- #6013 `6feeec1` [REST] Add memory pool API (paveljanik) +- #6576 `da9beb2` Stop parsing JSON after first finished construct. (Daniel Kraft) +- #5677 `9aa9099` libevent-based http server (Wladimir J. van der Laan) +- #6633 `bbc2b39` Report minimum ping time in getpeerinfo (Matt Corallo) +- #6648 `cd381d7` Simplify logic of REST request suffix parsing. (Daniel Kraft) +- #6695 `5e21388` libevent http fixes (Wladimir J. van der Laan) +- #5264 `48efbdb` show scriptSig signature hash types in transaction decodes. fixes #3166 (mruddy) +- #6719 `1a9f19a` Make HTTP server shutdown more graceful (Wladimir J. van der Laan) +- #6859 `0fbfc51` http: Restrict maximum size of http + headers (Wladimir J. van der Laan) +- #5936 `bf7c195` [RPC] Add optional locktime to createrawtransaction (Tom Harding) +- #6877 `26f5b34` rpc: Add maxmempool and effective min fee to getmempoolinfo (Wladimir J. van der Laan) +- #6970 `92701b3` Fix crash in validateaddress with -disablewallet (Wladimir J. van der Laan) +- #5574 `755b4ba` Expose GUI labels in RPC as comments (Luke-Jr) +- #6990 `dbd2c13` http: speed up shutdown (Wladimir J. van der Laan) +- #7013 `36baa9f` Remove LOCK(cs_main) from decodescript (Peter Todd) +- #6999 `972bf9c` add (max)uploadtarget infos to getnettotals RPC help (Jonas Schnelli) +- #7011 `31de241` Add mediantime to getblockchaininfo (Peter Todd) +- #7065 `f91e29f` http: add Boost 1.49 compatibility (Wladimir J. van der Laan) +- #7087 `be281d8` [Net]Add -enforcenodebloom option (Patrick Strateman) +- #7044 `438ee59` RPC: Added additional config option for multiple RPC users. (Gregory Sanders) +- #7072 `c143c49` [RPC] Add transaction size to JSON output (Nikita Zhavoronkov) +- #7022 `9afbd96` Change default block priority size to 0 (Alex Morcos) +- #7141 `c0c08c7` rpc: Don't translate warning messages (Wladimir J. van der Laan) +- #7312 `fd4bd50` Add RPC call abandontransaction (Alex Morcos) +- #7222 `e25b158` RPC: indicate which transactions are replaceable (Suhas Daftuar) +- #7472 `b2f2b85` rpc: Add WWW-Authenticate header to 401 response (Wladimir J. van der Laan) +- #7469 `9cb31e6` net.h fix spelling: misbeha{b,v}ing (Matt) + +### Configuration and command-line options + +- #6164 `8d05ec7` Allow user to use -debug=1 to enable all debugging (lpescher) +- #5288 `4452205` Added `-whiteconnections=<n>` option (Josh Lehan) +- #6284 `10ac38e` Fix argument parsing oddity with -noX (Wladimir J. van der Laan) +- #6489 `c9c017a` Give a better error message if system clock is bad (Casey Rodarmor) +- #6462 `c384800` implement uacomment config parameter which can add comments to user agent as per BIP-0014 (Pavol Rusnak) +- #6647 `a3babc8` Sanitize uacomment (MarcoFalke) +- #6742 `3b2d37c` Changed logging to make -logtimestamps to work also for -printtoconsole (arnuschky) +- #6846 `2cd020d` alias -h for -help (Daniel Cousens) +- #6622 `7939164` Introduce -maxuploadtarget (Jonas Schnelli) +- #6881 `2b62551` Debug: Add option for microsecond precision in debug.log (Suhas Daftuar) +- #6776 `e06c14f` Support -checkmempool=N, which runs checks once every N transactions (Pieter Wuille) +- #6896 `d482c0a` Make -checkmempool=1 not fail through int32 overflow (Pieter Wuille) +- #6993 `b632145` Add -blocksonly option (Patrick Strateman) +- #7323 `a344880` 0.12: Backport -bytespersigop option (Luke-Jr) +- #7386 `da83ecd` Add option `-permitrbf` to set transaction replacement policy (Wladimir J. van der Laan) +- #7290 `b16b5bc` Add missing options help (MarcoFalke) +- #7440 `c76bfff` Rename permitrbf to mempoolreplacement and provide minimal string-list forward compatibility (Luke-Jr) + +### Block and transaction handling + +- #6203 `f00b623` Remove P2SH coinbase flag, no longer interesting (Luke-Jr) +- #6222 `9c93ee5` Explicitly set tx.nVersion for the genesis block and mining tests (Mark Friedenbach) +- #5985 `3a1d3e8` Fix removing of orphan transactions (Alex Morcos) +- #6221 `dd8fe82` Prune: Support noncontiguous block files (Adam Weiss) +- #6124 `41076aa` Mempool only CHECKLOCKTIMEVERIFY (BIP65) verification, unparameterized version (Peter Todd) +- #6329 `d0a10c1` acceptnonstdtxn option to skip (most) "non-standard transaction" checks, for testnet/regtest only (Luke-Jr) +- #6410 `7cdefb9` Implement accurate memory accounting for mempool (Pieter Wuille) +- #6444 `24ce77d` Exempt unspendable transaction outputs from dust checks (dexX7) +- #5913 `a0625b8` Add absurdly high fee message to validation state (Shaul Kfir) +- #6177 `2f746c6` Prevent block.nTime from decreasing (Mark Friedenbach) +- #6377 `e545371` Handle no chain tip available in InvalidChainFound() (Ross Nicoll) +- #6551 `39ddaeb` Handle leveldb::DestroyDB() errors on wipe failure (Adam Weiss) +- #6654 `b0ce450` Mempool package tracking (Suhas Daftuar) +- #6715 `82d2aef` Fix mempool packages (Suhas Daftuar) +- #6680 `4f44530` use CBlockIndex instead of uint256 for UpdatedBlockTip signal (Jonas Schnelli) +- #6650 `4fac576` Obfuscate chainstate (James O'Beirne) +- #6777 `9caaf6e` Unobfuscate chainstate data in CCoinsViewDB::GetStats (James O'Beirne) +- #6722 `3b20e23` Limit mempool by throwing away the cheapest txn and setting min relay fee to it (Matt Corallo) +- #6889 `38369dd` fix locking issue with new mempool limiting (Jonas Schnelli) +- #6464 `8f3b3cd` Always clean up manual transaction prioritization (Casey Rodarmor) +- #6865 `d0badb9` Fix chainstate serialized_size computation (Pieter Wuille) +- #6566 `ff057f4` BIP-113: Mempool-only median time-past as endpoint for lock-time calculations (Mark Friedenbach) +- #6934 `3038eb6` Restores mempool only BIP113 enforcement (Gregory Maxwell) +- #6965 `de7d459` Benchmark sanity checks and fork checks in ConnectBlock (Matt Corallo) +- #6918 `eb6172a` Make sigcache faster, more efficient, larger (Pieter Wuille) +- #6771 `38ed190` Policy: Lower default limits for tx chains (Alex Morcos) +- #6932 `73fa5e6` ModifyNewCoins saves database lookups (Alex Morcos) +- #5967 `05d5918` Alter assumptions in CCoinsViewCache::BatchWrite (Alex Morcos) +- #6871 `0e93586` nSequence-based Full-RBF opt-in (Peter Todd) +- #7008 `eb77416` Lower bound priority (Alex Morcos) +- #6915 `2ef5ffa` [Mempool] Improve removal of invalid transactions after reorgs (Suhas Daftuar) +- #6898 `4077ad2` Rewrite CreateNewBlock (Alex Morcos) +- #6872 `bdda4d5` Remove UTXO cache entries when the tx they were added for is removed/does not enter mempool (Matt Corallo) +- #7062 `12c469b` [Mempool] Fix mempool limiting and replace-by-fee for PrioritiseTransaction (Suhas Daftuar) +- #7276 `76de36f` Report non-mandatory script failures correctly (Pieter Wuille) +- #7217 `e08b7cb` Mark blocks with too many sigops as failed (Suhas Daftuar) +- #7387 `f4b2ce8` Get rid of inaccurate ScriptSigArgsExpected (Pieter Wuille) + +### P2P protocol and network code + +- #6172 `88a7ead` Ignore getheaders requests when not synced (Suhas Daftuar) +- #5875 `9d60602` Be stricter in processing unrequested blocks (Suhas Daftuar) +- #6256 `8ccc07c` Use best header chain timestamps to detect partitioning (Gavin Andresen) +- #6283 `a903ad7` make CAddrMan::size() return the correct type of size_t (Diapolo) +- #6272 `40400d5` Improve proxy initialization (continues #4871) (Wladimir J. van der Laan, Diapolo) +- #6310 `66e5465` banlist.dat: store banlist on disk (Jonas Schnelli) +- #6412 `1a2de32` Test whether created sockets are select()able (Pieter Wuille) +- #6498 `219b916` Keep track of recently rejected transactions with a rolling bloom filter (cont'd) (Peter Todd) +- #6556 `70ec975` Fix masking of irrelevant bits in address groups. (Alex Morcos) +- #6530 `ea19c2b` Improve addrman Select() performance when buckets are nearly empty (Pieter Wuille) +- #6583 `af9305a` add support for miniupnpc api version 14 (Pavel Vasin) +- #6374 `69dc5b5` Connection slot exhaustion DoS mitigation (Patrick Strateman) +- #6636 `536207f` net: correctly initialize nMinPingUsecTime (Wladimir J. van der Laan) +- #6579 `0c27795` Add NODE_BLOOM service bit and bump protocol version (Matt Corallo) +- #6148 `999c8be` Relay blocks when pruning (Suhas Daftuar) +- #6588 `cf9bb11` In (strCommand == "tx"), return if AlreadyHave() (Tom Harding) +- #6974 `2f71b07` Always allow getheaders from whitelisted peers (Wladimir J. van der Laan) +- #6639 `bd629d7` net: Automatically create hidden service, listen on Tor (Wladimir J. van der Laan) +- #6984 `9ffc687` don't enforce maxuploadtarget's disconnect for whitelisted peers (Jonas Schnelli) +- #7046 `c322652` Net: Improve blocks only mode. (Patrick Strateman) +- #7090 `d6454f6` Connect to Tor hidden services by default (when listening on Tor) (Peter Todd) +- #7106 `c894fbb` Fix and improve relay from whitelisted peers (Pieter Wuille) +- #7129 `5d5ef3a` Direct headers announcement (rebase of #6494) (Pieter Wuille) +- #7079 `1b5118b` Prevent peer flooding inv request queue (redux) (redux) (Gregory Maxwell) +- #7166 `6ba25d2` Disconnect on mempool requests from peers when over the upload limit. (Gregory Maxwell) +- #7133 `f31955d` Replace setInventoryKnown with a rolling bloom filter (rebase of #7100) (Pieter Wuille) +- #7174 `82aff88` Don't do mempool lookups for "mempool" command without a filter (Matt Corallo) +- #7179 `44fef99` net: Fix sent reject messages for blocks and transactions (Wladimir J. van der Laan) +- #7181 `8fc174a` net: Add and document network messages in protocol.h (Wladimir J. van der Laan) +- #7125 `10b88be` Replace global trickle node with random delays (Pieter Wuille) +- #7415 `cb83beb` net: Hardcoded seeds update January 2016 (Wladimir J. van der Laan) +- #7438 `e2d9a58` Do not absolutely protect local peers; decide group ties based on time (Gregory Maxwell) +- #7439 `86755bc` Add whitelistforcerelay to control forced relaying. [#7099 redux] (Gregory Maxwell) +- #7482 `e16f5b4` Ensure headers count is correct (Suhas Daftuar) + +### Validation + +- #5927 `8d9f0a6` Reduce checkpoints' effect on consensus. (Pieter Wuille) +- #6299 `24f2489` Bugfix: Don't check the genesis block header before accepting it (Jorge Timón) +- #6361 `d7ada03` Use real number of cores for default -par, ignore virtual cores (Wladimir J. van der Laan) +- #6519 `87f37e2` Make logging for validation optional (Wladimir J. van der Laan) +- #6351 `2a1090d` CHECKLOCKTIMEVERIFY (BIP65) IsSuperMajority() soft-fork (Peter Todd) +- #6931 `54e8bfe` Skip BIP 30 verification where not necessary (Alex Morcos) +- #6954 `e54ebbf` Switch to libsecp256k1-based ECDSA validation (Pieter Wuille) +- #6508 `61457c2` Switch to a constant-space Merkle root/branch algorithm. (Pieter Wuille) +- #6914 `327291a` Add pre-allocated vector type and use it for CScript (Pieter Wuille) +- #7500 `889e5b3` Correctly report high-S violations (Pieter Wuille) + + +### Build system + +- #6210 `0e4f2a0` build: disable optional use of gmp in internal secp256k1 build (Wladimir J. van der Laan) +- #6214 `87406aa` [OSX] revert renaming of Bitcoin-Qt.app and use CFBundleDisplayName (partial revert of #6116) (Jonas Schnelli) +- #6218 `9d67b10` build/gitian misc updates (Cory Fields) +- #6269 `d4565b6` gitian: Use the new bitcoin-detached-sigs git repo for OSX signatures (Cory Fields) +- #6418 `d4a910c` Add autogen.sh to source tarball. (randy-waterhouse) +- #6373 `1ae3196` depends: non-qt bumps for 0.12 (Cory Fields) +- #6434 `059b352` Preserve user-passed CXXFLAGS with --enable-debug (Gavin Andresen) +- #6501 `fee6554` Misc build fixes (Cory Fields) +- #6600 `ef4945f` Include bitcoin-tx binary on Debian/Ubuntu (Zak Wilcox) +- #6619 `4862708` depends: bump miniupnpc and ccache (Michael Ford) +- #6801 `ae69a75` [depends] Latest config.guess and config.sub (Michael Ford) +- #6938 `193f7b5` build: If both Qt4 and Qt5 are installed, use Qt5 (Wladimir J. van der Laan) +- #7092 `348b281` build: Set osx permissions in the dmg to make Gatekeeper happy (Cory Fields) +- #6980 `eccd671` [Depends] Bump Boost, miniupnpc, ccache & zeromq (Michael Ford) +- #7424 `aa26ee0` Add security/export checks to gitian and fix current failures (Cory Fields) + +### Wallet + +- #6183 `87550ee` Fix off-by-one error w/ nLockTime in the wallet (Peter Todd) +- #6057 `ac5476e` re-enable wallet in autoprune (Jonas Schnelli) +- #6356 `9e6c33b` Delay initial pruning until after wallet init (Adam Weiss) +- #6088 `91389e5` fundrawtransaction (Matt Corallo) +- #6415 `ddd8d80` Implement watchonly support in fundrawtransaction (Matt Corallo) +- #6567 `0f0f323` Fix crash when mining with empty keypool. (Daniel Kraft) +- #6688 `4939eab` Fix locking in GetTransaction. (Alex Morcos) +- #6645 `4dbd43e` Enable wallet key imports without rescan in pruned mode. (Gregory Maxwell) +- #6550 `5b77244` Do not store Merkle branches in the wallet. (Pieter Wuille) +- #5924 `12a7712` Clean up change computation in CreateTransaction. (Daniel Kraft) +- #6906 `48b5b84` Reject invalid pubkeys when reading ckey items from the wallet. (Gregory Maxwell) +- #7010 `e0a5ef8` Fix fundrawtransaction handling of includeWatching (Peter Todd) +- #6851 `616d61b` Optimisation: Store transaction list order in memory rather than compute it every need (Luke-Jr) +- #6134 `e92377f` Improve usage of fee estimation code (Alex Morcos) +- #7103 `a775182` [wallet, rpc tests] Fix settxfee, paytxfee (MarcoFalke) +- #7105 `30c2d8c` Keep track of explicit wallet conflicts instead of using mempool (Pieter Wuille) +- #7096 `9490bd7` [Wallet] Improve minimum absolute fee GUI options (Jonas Schnelli) +- #6216 `83f06ca` Take the training wheels off anti-fee-sniping (Peter Todd) +- #4906 `96e8d12` Issue#1643: Coinselection prunes extraneous inputs from ApproximateBestSubset (Murch) +- #7200 `06c6a58` Checks for null data transaction before issuing error to debug.log (Andy Craze) +- #7296 `a36d79b` Add sane fallback for fee estimation (Alex Morcos) +- #7293 `ff9b610` Add regression test for vValue sort order (MarcoFalke) +- #7306 `4707797` Make sure conflicted wallet tx's update balances (Alex Morcos) +- #7381 `621bbd8` [walletdb] Fix syntax error in key parser (MarcoFalke) +- #7491 `00ec73e` wallet: Ignore MarkConflict if block hash is not known (Wladimir J. van der Laan) +- #7502 `1329963` Update the wallet best block marker before pruning (Pieter Wuille) + +### GUI + +- #6217 `c57e12a` disconnect peers from peers tab via context menu (Diapolo) +- #6209 `ab0ec67` extend rpc console peers tab (Diapolo) +- #6484 `1369d69` use CHashWriter also in SignVerifyMessageDialog (Pavel Vasin) +- #6487 `9848d42` Introduce PlatformStyle (Wladimir J. van der Laan) +- #6505 `100c9d3` cleanup icons (MarcoFalke) +- #4587 `0c465f5` allow users to set -onion via GUI (Diapolo) +- #6529 `c0f66ce` show client user agent in debug window (Diapolo) +- #6594 `878ea69` Disallow duplicate windows. (Casey Rodarmor) +- #5665 `6f55cdd` add verifySize() function to PaymentServer (Diapolo) +- #6317 `ca5e2a1` minor optimisations in peertablemodel (Diapolo) +- #6315 `e59d2a8` allow banning and unbanning over UI->peers table (Jonas Schnelli) +- #6653 `e04b2fa` Pop debug window in foreground when opened twice (MarcoFalke) +- #6864 `c702521` Use monospace font (MarcoFalke) +- #6887 `3694b74` Update coin control and smartfee labels (MarcoFalke) +- #7000 `814697c` add shortcurts for debug-/console-window (Jonas Schnelli) +- #6951 `03403d8` Use maxTxFee instead of 10000000 (MarcoFalke) +- #7051 `a190777` ui: Add "Copy raw transaction data" to transaction list context menu (Wladimir J. van der Laan) +- #6979 `776848a` simple mempool info in debug window (Jonas Schnelli) +- #7006 `26af1ac` add startup option to reset Qt settings (Jonas Schnelli) +- #6780 `2a94cd6` Call init's parameter interaction before we create the UI options model (Jonas Schnelli) +- #7112 `96b8025` reduce cs_main locks during tip update, more fluently update UI (Jonas Schnelli) +- #7206 `f43c2f9` Add "NODE_BLOOM" to guiutil so that peers don't get UNKNOWN[4] (Matt Corallo) +- #7282 `5cadf3e` fix coincontrol update issue when deleting a send coins entry (Jonas Schnelli) +- #7319 `1320300` Intro: Display required space (Jonas Schnelli) +- #7318 `9265e89` quickfix for RPC timer interface problem (Jonas Schnelli) +- #7327 `b16b5bc` [Wallet] Transaction View: LastMonth calculation fixed (crowning-) +- #7364 `7726c48` [qt] Windows: Make rpcconsole monospace font larger (MarcoFalke) +- #7384 `294f432` [qt] Peertable: Increase SUBVERSION_COLUMN_WIDTH (MarcoFalke) + +### Tests and QA + +- #6305 `9005c91` build: comparison tool swap (Cory Fields) +- #6318 `e307e13` build: comparison tool NPE fix (Cory Fields) +- #6337 `0564c5b` Testing infrastructure: mocktime fixes (Gavin Andresen) +- #6350 `60abba1` add unit tests for the decodescript rpc (mruddy) +- #5881 `3203a08` Fix and improve txn_doublespend.py test (Tom Harding) +- #6390 `6a73d66` tests: Fix bitcoin-tx signing test case (Wladimir J. van der Laan) +- #6368 `7fc25c2` CLTV: Add more tests to improve coverage (Esteban Ordano) +- #6414 `5121c68` Fix intermittent test failure, reduce test time (Tom Harding) +- #6417 `44fa82d` [QA] fix possible reorg issue in (fund)rawtransaction(s).py RPC test (Jonas Schnelli) +- #6398 `3d9362d` rpc: Remove chain-specific RequireRPCPassword (Wladimir J. van der Laan) +- #6428 `bb59e78` tests: Remove old sh-based test framework (Wladimir J. van der Laan) +- #5515 `d946e9a` RFC: Assert on probable deadlocks if the second lock isnt try_lock (Matt Corallo) +- #6287 `d2464df` Clang lock debug (Cory Fields) +- #6465 `410fd74` Don't share objects between TestInstances (Casey Rodarmor) +- #6534 `6c1c7fd` Fix test locking issues and un-revert the probable-deadlines assertions commit (Cory Fields) +- #6509 `bb4faee` Fix race condition on test node shutdown (Casey Rodarmor) +- #6523 `561f8af` Add p2p-fullblocktest.py (Casey Rodarmor) +- #6590 `981fd92` Fix stale socket rebinding and re-enable python tests for Windows (Cory Fields) +- #6730 `cb4d6d0` build: Remove dependency of bitcoin-cli on secp256k1 (Wladimir J. van der Laan) +- #6616 `5ab5dca` Regression Tests: Migrated rpc-tests.sh to all Python rpc-tests.py (Peter Tschipper) +- #6720 `d479311` Creates unittests for addrman, makes addrman more testable. (Ethan Heilman) +- #6853 `c834f56` Added fPowNoRetargeting field to Consensus::Params (Eric Lombrozo) +- #6827 `87e5539` [rpc-tests] Check return code (MarcoFalke) +- #6848 `f2c869a` Add DERSIG transaction test cases (Ross Nicoll) +- #6813 `5242bb3` Support gathering code coverage data for RPC tests with lcov (dexX7) +- #6888 `c8322ff` Clear strMiscWarning before running PartitionAlert (Eric Lombrozo) +- #6894 `2675276` [Tests] Fix BIP65 p2p test (Suhas Daftuar) +- #6863 `725539e` [Test Suite] Fix test for null tx input (Daniel Kraft) +- #6926 `a6d0d62` tests: Initialize networking on windows (Wladimir J. van der Laan) +- #6822 `9fa54a1` [tests] Be more strict checking dust (MarcoFalke) +- #6804 `5fcc14e` [tests] Add basic coverage reporting for RPC tests (James O'Beirne) +- #7045 `72dccfc` Bugfix: Use unique autostart filenames on Linux for testnet/regtest (Luke-Jr) +- #7095 `d8368a0` Replace scriptnum_test's normative ScriptNum implementation (Wladimir J. van der Laan) +- #7063 `6abf6eb` [Tests] Add prioritisetransaction RPC test (Suhas Daftuar) +- #7137 `16f4a6e` Tests: Explicitly set chain limits in replace-by-fee test (Suhas Daftuar) +- #7216 `9572e49` Removed offline testnet DNSSeed 'alexykot.me'. (tnull) +- #7209 `f3ad812` test: don't override BITCOIND and BITCOINCLI if they're set (Wladimir J. van der Laan) +- #7226 `301f16a` Tests: Add more tests to p2p-fullblocktest (Suhas Daftuar) +- #7153 `9ef7c54` [Tests] Add mempool_limit.py test (Jonas Schnelli) +- #7170 `453c567` tests: Disable Tor interaction (Wladimir J. van der Laan) +- #7229 `1ed938b` [qa] wallet: Check if maintenance changes the balance (MarcoFalke) +- #7308 `d513405` [Tests] Eliminate intermittent failures in sendheaders.py (Suhas Daftuar) +- #7468 `947c4ff` [rpc-tests] Change solve() to use rehash (Brad Andrews) + +### Miscellaneous + +- #6213 `e54ff2f` [init] add -blockversion help and extend -upnp help (Diapolo) +- #5975 `1fea667` Consensus: Decouple ContextualCheckBlockHeader from checkpoints (Jorge Timón) +- #6061 `eba2f06` Separate Consensus::CheckTxInputs and GetSpendHeight in CheckInputs (Jorge Timón) +- #5994 `786ed11` detach wallet from miner (Jonas Schnelli) +- #6387 `11576a5` [bitcoin-cli] improve error output (Jonas Schnelli) +- #6401 `6db53b4` Add BITCOIND_SIGTERM_TIMEOUT to OpenRC init scripts (Florian Schmaus) +- #6430 `b01981e` doc: add documentation for shared library libbitcoinconsensus (Braydon Fuller) +- #6372 `dcc495e` Update Linearize tool to support Windows paths; fix variable scope; update README and example configuration (Paul Georgiou) +- #6453 `8fe5cce` Separate core memory usage computation in core_memusage.h (Pieter Wuille) +- #6149 `633fe10` Buffer log messages and explicitly open logs (Adam Weiss) +- #6488 `7cbed7f` Avoid leaking file descriptors in RegisterLoad (Casey Rodarmor) +- #6497 `a2bf40d` Make sure LogPrintf strings are line-terminated (Wladimir J. van der Laan) +- #6504 `b6fee6b` Rationalize currency unit to "BTC" (Ross Nicoll) +- #6507 `9bb4dd8` Removed contrib/bitrpc (Casey Rodarmor) +- #6527 `41d650f` Use unique name for AlertNotify tempfile (Casey Rodarmor) +- #6561 `e08a7d9` limitedmap fixes and tests (Casey Rodarmor) +- #6565 `a6f2aff` Make sure we re-acquire lock if a task throws (Casey Rodarmor) +- #6599 `f4d88c4` Make sure LogPrint strings are line-terminated (Ross Nicoll) +- #6630 `195942d` Replace boost::reverse_lock with our own (Casey Rodarmor) +- #6103 `13b8282` Add ZeroMQ notifications (João Barbosa) +- #6692 `d5d1d2e` devtools: don't push if signing fails in github-merge (Wladimir J. van der Laan) +- #6728 `2b0567b` timedata: Prevent warning overkill (Wladimir J. van der Laan) +- #6713 `f6ce59c` SanitizeString: Allow hypen char (MarcoFalke) +- #5987 `4899a04` Bugfix: Fix testnet-in-a-box use case (Luke-Jr) +- #6733 `b7d78fd` Simple benchmarking framework (Gavin Andresen) +- #6854 `a092970` devtools: Add security-check.py (Wladimir J. van der Laan) +- #6790 `fa1d252` devtools: add clang-format.py (MarcoFalke) +- #7114 `f3d0fdd` util: Don't set strMiscWarning on every exception (Wladimir J. van der Laan) +- #7078 `93e0514` uint256::GetCheapHash bigendian compatibility (arowser) +- #7094 `34e02e0` Assert now > 0 in GetTime GetTimeMillis GetTimeMicros (Patrick Strateman) + +Credits +======= + +Thanks to everyone who directly contributed to this release: + +- accraze +- Adam Weiss +- Alex Morcos +- Alex van der Peet +- AlSzacrel +- Altoidnerd +- Andriy Voskoboinyk +- antonio-fr +- Arne Brutschy +- Ashley Holman +- Bob McElrath +- Braydon Fuller +- BtcDrak +- Casey Rodarmor +- centaur1 +- Chris Kleeschulte +- Christian Decker +- Cory Fields +- daniel +- Daniel Cousens +- Daniel Kraft +- David Hill +- dexX7 +- Diego Viola +- Elias Rohrer +- Eric Lombrozo +- Erik Mossberg +- Esteban Ordano +- EthanHeilman +- Florian Schmaus +- Forrest Voight +- Gavin Andresen +- Gregory Maxwell +- Gregory Sanders / instagibbs +- Ian T +- Irving Ruan +- Jacob Welsh +- James O'Beirne +- Jeff Garzik +- Johnathan Corgan +- Jonas Schnelli +- Jonathan Cross +- João Barbosa +- Jorge Timón +- Josh Lehan +- J Ross Nicoll +- kazcw +- Kevin Cooper +- lpescher +- Luke Dashjr +- Marco +- MarcoFalke +- Mark Friedenbach +- Matt +- Matt Bogosian +- Matt Corallo +- Matt Quinn +- Micha +- Michael +- Michael Ford / fanquake +- Midnight Magic +- Mitchell Cash +- mrbandrews +- mruddy +- Nick +- Patrick Strateman +- Paul Georgiou +- Paul Rabahy +- Pavel Janík / paveljanik +- Pavel Vasin +- Pavol Rusnak +- Peter Josling +- Peter Todd +- Philip Kaufmann +- Pieter Wuille +- ptschip +- randy-waterhouse +- rion +- Ross Nicoll +- Ryan Havar +- Shaul Kfir +- Simon Males +- Stephen +- Suhas Daftuar +- tailsjoin +- Thomas Kerin +- Tom Harding +- tulip +- unsystemizer +- Veres Lajos +- Wladimir J. van der Laan +- xor-freenet +- Zak Wilcox +- zathras-crypto + +As well as everyone that helped translating on [Transifex](https://www.transifex.com/projects/p/bitcoin/). + |