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This is a synchronous callback notifying clients of all tip changes.
It allows clients to respond to a new block immediately after it is
connected. The synchronicity is important for things like
m_recent_rejects, in which a transaction's validity can change (rejected
vs accepted) when this event is processed. For example, the transaction
might have a timelock condition that has just been met. This is distinct
from something like m_recent_confirmed_transactions, in which the
validation outcome is the same (valid vs already-have), so it does not
need to be reset immediately.
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By defining a virtual interface class for the scheduler client, users of
the kernel can now define their own event consuming infrastructure,
without having to spawn threads or rely on the scheduler design.
Removing CScheduler also allows removing the thread and
exception modules from the kernel library.
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-BEGIN VERIFY SCRIPT-
s() { git grep -l "$1" src | xargs sed -i "s/$1/$2/g"; }
s 'CMainSignals' 'ValidationSignals'
s 'MainSignalsImpl' 'ValidationSignalsImpl'
-END VERIFY SCRIPT-
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-BEGIN VERIFY SCRIPT-
s() { git grep -l "$1" src | (grep -v "$3" || cat;) | xargs sed -i "s/$1/$2/g"; }
s 'SingleThreadedSchedulerClient' 'SerialTaskRunner' ''
s 'SinglethreadedSchedulerClient' 'SerialTaskRunner' ''
s 'm_schedulerClient' 'm_task_runner' ''
s 'AddToProcessQueue' 'insert' ''
s 'EmptyQueue' 'flush' ''
s 'CallbacksPending' 'size' 'validation'
sed -i '109s/CallbacksPending/size/' src/validationinterface.cpp
-END VERIFY SCRIPT-
Co-authored-by: Russell Yanofsky <russ@yanofsky.org>
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To this end move some functions into the CMainSignals class.
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Create a new struct `NewMempoolTransactionInfo` that will be used as the new parameter of
`TransactionAddedToMempool` callback.
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This commit adds a new callback `MempoolTransactionsRemovedForBlock` which notify
its listeners of the transactions that are removed from the mempool because a new
block is connected, along with the block height the transactions were removed.
The transactions are in `RemovedMempoolTransactionInfo` format.
`CTransactionRef`, base fee, virtual size, and height which the transaction was added
to the mempool are all members of the struct called `RemovedMempoolTransactionInfo`.
A struct `NewMempoolTransactionInfo`, which has fields similar to `RemovedMempoolTransactionInfo`,
will be added in a later commit, create a struct `TransactionInfo` with all similar fields.
They can both have a member with type `TransactionInfo`.
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This allows consumers to decide how to handle events from background or
assumedvalid chainstates.
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-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./
-END VERIFY SCRIPT-
Commits of previous years:
- 2021: f47dda2c58b5d8d623e0e7ff4e74bc352dfa83d7
- 2020: fa0074e2d82928016a43ca408717154a1c70a4db
- 2019: aaaaad6ac95b402fe18d019d67897ced6b316ee0
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Currently the exact reason a transaction is removed from the mempool isn't
logged. It is sometimes detectable from context, but adding the `reason` to
the validation interface logs (where it is already passed) seems like an easy
way to disambiguate.
For example, in the case of mempool expiry, the logs look like this:
```
[validationinterface.cpp:220] [TransactionRemovedFromMempool] [validation] Enqueuing TransactionRemovedFromMempool: txid=<txid> wtxid=<wtxid>
[txmempool.cpp:1050] [RemoveUnbroadcastTx] [mempool] Removed <txid> from set of unbroadcast txns before confirmation that txn was sent out
[validationinterface.cpp:220] [operator()] [validation] TransactionRemovedFromMempool: txid=<txid> wtxid=<wtxid>
[validation.cpp:267] [LimitMempoolSize] [mempool] Expired 1 transactions from the memory pool
```
There is no context-free way to know $txid was evicted on the basis of expiry.
This change will make that case (and probably others) clear.
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Since the removal of NODISCARD in 81d5af42f4dba5b68a597536cad7f61894dc22a3,
the only attributes def is LIFETIMEBOUND, and it's included in many more
places that it is used.
This removes all includes which do not have an associated use of LIFETIMEBOUND,
and adds it to the following files, due to their use of the same:
* src/validationinterface.h
* src/script/standard.h
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436ce0233c276e263dcb441255dc0b881cb39cfb sync.h: strengthen AssertLockNotHeld assertion (Anthony Towns)
7d73f58e9cea8f4b0bc16512983898fddde3d764 Increase threadsafety annotation coverage (Anthony Towns)
Pull request description:
This changes `AssertLockNotHeld` so that it is annotated with the negative capability for the mutex it refers to. clang applies negative capabilities recursively, so this helps avoid forgetting to annotate functions.
Note that this can't reasonably be used for globals, because clang would require every function to be annotated with `EXCLUSIVE_LOCKS_REQUIRED(!g_mutex)` for each global mutex. At present, the only global mutexes that use `AssertLockNotHeld` are `RecursiveMutex` so we treat that as an exception in order to avoid having to add an excessive number of negative annotations.
ACKs for top commit:
vasild:
ACK 436ce0233c276e263dcb441255dc0b881cb39cfb
MarcoFalke:
review ACK 436ce0233c276e263dcb441255dc0b881cb39cfb 🌺
Tree-SHA512: 5f16d098790a36b5277324d5ee89cdc87033c19b11c7943c2f630a41c2e3998eb39d356a763e857f4d8fefb6c0c02291f720bb6769bcbdf5e2cd765bf266ab8c
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```
-BEGIN VERIFY SCRIPT-
s() { git grep -l "$1" src test doc | xargs sed -i "s/$1/$2/g"; }
s 'MainSignalsInstance' 'MainSignalsImpl'
-END VERIFY SCRIPT-
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and use Doxygen documentation for it, per our developer notes.
Context:
MainSignalsInstance was created in 3a19fed9db5 and originally was a struct
collection of boost::signals methods moved to validationinterface.cpp, in order
to no longer need to include boost/signals in validationinterface.h.
MainSignalsInstance then evolved in d6815a23131 to remove boost/signals2 and became class-like.
[C.8: Use class rather than struct if any member is
non-public](https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Rc-class)
[C.2: Use class if the class has an invariant; use struct if the data members can vary
independently](https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#c2-use-class-if-the-class-has-an-invariant-use-struct-if-the-data-members-can-vary-independently)
A class also has the advantage of default private access, as opposed to public for a struct.
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Using the zmq notifications to avoid excessive mempool polling can be difficult
given the current notifications available. It announces all transactions
being added to mempool or included in blocks, but announces no evictions
and gives no indication if the transaction is in the mempool or a block.
Block notifications for zmq are also substandard, in that it only announces
block tips, while all block transactions are still announced.
This commit adds a unified stream which can be used to closely track mempool:
1) getrawmempool to fill out mempool knowledge
2) if txhash is announced, add or remove from set
based on add/remove flag
3) if blockhash is announced, get block txn list,
remove from those transactions local view of mempool
4) if we drop a sequence number, go to (1)
The mempool sequence number starts at the value 1, and
increments each time a transaction enters the mempool,
or is evicted from the mempool for any reason, including
block inclusion. The mempool sequence number is published
via ZMQ for any transaction-related notification.
These features allow for ZMQ/RPC consumer to track mempool
state in a more exacting way, without unnecesarily polling
getrawmempool. See interface_zmq.py::test_mempool_sync for
example usage.
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https://github.com/bitcoin/bitcoin/pull/18982#pullrequestreview-416974841
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This fix is a based on the fix by Antoine Riard <ariard@student.42.fr> in
https://github.com/bitcoin/bitcoin/pull/18600.
Unlike that PR, which implements some new behavior, this just restores previous
wallet notification and status behavior for transactions removed from the
mempool because they conflict with transactions in a block. The behavior was
accidentally changed in two `CWallet::BlockConnected` updates:
a31be09bfd77eed497a8e251d31358e16e2f2eb1 and
7e89994133725125dddbfa8d45484e3b9ed51c6e from
https://github.com/bitcoin/bitcoin/pull/16624, causing issue
https://github.com/bitcoin/bitcoin/issues/18325.
The change here could be improved and replaced with a more comprehensive
cleanup, so it includes a detailed comment explaining future considerations.
Fixes #18325
Co-authored-by: Antoine Riard <ariard@student.42.fr>
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The previous code for MainSignalsInstance::Clear would decrement the reference
count of every interface, including ones that were already Unregister()ed but
still being executed.
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Stop using boost::signals2 internally in validationinterface. Replace with
std::list and Add/Remove/Clear/Iterate helper functions.
Motivation for change is to reduce dependencies and avoid issues happening with
boost versions before 1.59:
https://github.com/bitcoin/bitcoin/issues/18517
https://github.com/bitcoin/bitcoin/pull/18471
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Currently it's possible for ReleaseWallet to delete the CWallet pointer while
it is processing BlockConnected, etc chain notifications.
To fix this, unregister from notifications earlier in UnloadWallet instead of
ReleaseWallet, and use a new RegisterSharedValidationInterface function to
prevent the CValidationInterface shared_ptr from being deleted until the last
notification is actually finished.
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signals
e57980b4738c10344baf136de3e050a3cb958ca5 [mempool] Remove NotifyEntryAdded and NotifyEntryRemoved callbacks (John Newbery)
2dd561f36124972d2364f941de9c3417c65f05b6 [validation] Remove pool member from ConnectTrace (John Newbery)
969b65f3f527631ede1a31c7855151e5c5d91f8f [validation] Remove NotifyEntryRemoved callback from ConnectTrace (John Newbery)
5613f9842b4000fed088b8cf7b99674c328d15e1 [validation] Remove conflictedTxs from PerBlockConnectTrace (John Newbery)
cdb893443cc16edf974f099b8485e04b3db1b1d7 [validation interface] Remove vtxConflicted from BlockConnected (John Newbery)
1168394d759b13af68acec6d5bfa04aaa24561f8 [wallet] Notify conflicted transactions in TransactionRemovedFromMempool (John Newbery)
Pull request description:
These boost signals were added in #9371, before we had a `TransactionRemovedFromMempool` method in the validation interface. The `NotifyEntryAdded` callback was used by validation to build a vector of conflicted transactions when connecting a block, which the wallet was notified of in the `BlockConnected` CValidationInterface callback.
Now that we have a `TransactionRemovedFromMempool` callback, we can fire that signal directly from the mempool for conflicted transactions.
Note that #9371 was implemented to ensure `-walletnotify` events were fired for these conflicted transaction. We inadvertently stopped sending these notifications in #16624 (Sep 2019 commit 7e89994). We should probably fix that, but in a different PR.
ACKs for top commit:
jonatack:
Re-ACK e57980b
ryanofsky:
Code review ACK e57980b4738c10344baf136de3e050a3cb958ca5, no code changes since previous review, but helpful new code comments have been added and the PR description is now more clear about where the old code came from
Tree-SHA512: 3bdbaf1ef2731e788462d4756e69c42a1efdcf168691ce1bbfdaa4b7b55ac3c5b1fd4ab7b90bcdec653703600501b4224d252cfc086aef28f9ce0da3b0563a69
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The wallet now uses TransactionRemovedFromMempool to be notified about
conflicted wallet, and no other clients use vtxConflicted.
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-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./
-END VERIFY SCRIPT-
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f9abf4ab6d3d3e4d4b7e90723020b5422a141a6f Add logging for CValidationInterface events (Jeffrey Czyz)
6edebacb2191373e76d79a4972d6192300976096 Refactor FormatStateMessage for clarity (Jeffrey Czyz)
72f3227c83810936e7a334304e5fd7c6dab8e91b Format CValidationState properly in all cases (Jeffrey Czyz)
428ac70095253225f64462ee15c595644747f376 Add VALIDATION to BCLog::LogFlags (Jeffrey Czyz)
Pull request description:
Add logging of `CValidationInterface` callbacks using a new `VALIDATIONINTERFACE` log flag (see #12994). A separate flag is desirable as the logging can be noisy and thus may need to be disabled without affecting other logging.
This could help debug issues where there may be race conditions at play, such as #12978.
ACKs for top commit:
jnewbery:
ACK f9abf4ab6d3d3e4d4b7e90723020b5422a141a6f
hebasto:
ACK f9abf4ab6d3d3e4d4b7e90723020b5422a141a6f
ariard:
ACK f9abf4a, only changes since 0cadb12 are replacing log indication `VALIDATIONINTERFACE` by `VALIDATION` and avoiding a forward declaration with a new include
ryanofsky:
Code review ACK f9abf4ab6d3d3e4d4b7e90723020b5422a141a6f. Just suggested changes since last review (thanks!)
Tree-SHA512: 3e0f6e2c8951cf46fbad3ff440971d95d526df2a52a2e4d6452a82785c63d53accfdabae66b0b30e2fe0b00737f8d5cb717edbad1460b63acb11a72c8f5d4236
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This could help debug issues where there may be race conditions at play,
such as #12978.
Fixes #12994.
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-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./
-END VERIFY SCRIPT-
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This commit fires TransactionRemovedFromMempool callbacks from the
mempool and cleans up a bunch of code.
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To do so we update CValidationInterface::BlockDisconnect to take a
CBlockIndex pointing to the block being disconnected.
This new parameter will be use in the following commit to establish
wallet height.
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Split CValidationState into TxValidationState and BlockValidationState
to store validation results for transactions and blocks respectively.
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Removes the now-unused Broadcast/ResendWalletTransactions interface from
validationinterface.
The wallet_resendwallettransactions.py needs a sleep added at the start
to make sure that the rebroadcast scheduler is warmed up before the next
block is mined.
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Move nTimeBestReceived (which is only used for wallet
rebroadcasts) into the wallet.
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When a wallet is created it is registered in the validation interface (in
CWallet::CreateWalletFromFile) but it is not immediately added to the
wallets list. If a shutdown is requested before AddWallet (case more
evident when -rescan is set) then m_internals can be released (in
Shutdown -> UnregisterBackgroundSignalScheduler) before the wallet and
then ReleaseWallet would call UnregisterValidationInterface with
m_internals already released.
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In CMainSignals::RegisterWithMempoolSignals running under Ubuntu 14.04
(QT 5.2), absent piecewise construction this fails to create the pair
because the argument is a connection, which is converted into a
non-copyable scoped_connection.
validationinterface.cpp:80:186: required from here
/usr/include/boost/signals2/connection.hpp:234:7: error: ‘boost::signals2::scoped_connection::scoped_connection(const boost::signals2::scoped_connection&)’ is private
scoped_connection(const scoped_connection &other);
^
In file included from /usr/include/c++/4.8/utility:70:0,
from /usr/include/c++/4.8/algorithm:60,
from ./prevector.h:13,
from ./script/script.h:10,
from ./primitives/transaction.h:11,
from ./validationinterface.h:9,
from validationinterface.cpp:6:
/usr/include/c++/4.8/bits/stl_pair.h:134:45: error: within this context
: first(std::forward<_U1>(__x)), second(__y) { }
https://travis-ci.org/bitcoin/bitcoin/jobs/473689141#L2172
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cb53b825c2 scripted-diff: Replace boost::bind with std::bind (Chun Kuan Lee)
2196c51821 refactor: Use boost::scoped_connection in signal/slot, also prefer range-based loop instead of std::transform (Chun Kuan Lee)
Pull request description:
Replace boost::bind with std::bind
- In `src/rpc/server.cpp`, replace `std::transform` with simple loop.
- In `src/validation.cpp`, store the `boost::signals2::connection` object and use it to disconnect.
- In `src/validationinterface.cpp`, use 2 map to store the `boost::signals2::scoped_connection` object.
Tree-SHA512: 6653cbe00036fecfc495340618efcba6d7be0227c752b37b81a27184433330f817e8de9257774e9b35828026cb55f11ee7f17d6c388aebe22c4a3df13b5092f0
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-BEGIN VERIFY SCRIPT-
mkdir -p src/util
git mv src/util.h src/util/system.h
git mv src/util.cpp src/util/system.cpp
git mv src/utilmemory.h src/util/memory.h
git mv src/utilmoneystr.h src/util/moneystr.h
git mv src/utilmoneystr.cpp src/util/moneystr.cpp
git mv src/utilstrencodings.h src/util/strencodings.h
git mv src/utilstrencodings.cpp src/util/strencodings.cpp
git mv src/utiltime.h src/util/time.h
git mv src/utiltime.cpp src/util/time.cpp
sed -i 's/<util\.h>/<util\/system\.h>/g' $(git ls-files 'src/*.h' 'src/*.cpp')
sed -i 's/<utilmemory\.h>/<util\/memory\.h>/g' $(git ls-files 'src/*.h' 'src/*.cpp')
sed -i 's/<utilmoneystr\.h>/<util\/moneystr\.h>/g' $(git ls-files 'src/*.h' 'src/*.cpp')
sed -i 's/<utilstrencodings\.h>/<util\/strencodings\.h>/g' $(git ls-files 'src/*.h' 'src/*.cpp')
sed -i 's/<utiltime\.h>/<util\/time\.h>/g' $(git ls-files 'src/*.h' 'src/*.cpp')
sed -i 's/BITCOIN_UTIL_H/BITCOIN_UTIL_SYSTEM_H/g' src/util/system.h
sed -i 's/BITCOIN_UTILMEMORY_H/BITCOIN_UTIL_MEMORY_H/g' src/util/memory.h
sed -i 's/BITCOIN_UTILMONEYSTR_H/BITCOIN_UTIL_MONEYSTR_H/g' src/util/moneystr.h
sed -i 's/BITCOIN_UTILSTRENCODINGS_H/BITCOIN_UTIL_STRENCODINGS_H/g' src/util/strencodings.h
sed -i 's/BITCOIN_UTILTIME_H/BITCOIN_UTIL_TIME_H/g' src/util/time.h
sed -i 's/ util\.\(h\|cpp\)/ util\/system\.\1/g' src/Makefile.am
sed -i 's/utilmemory\.\(h\|cpp\)/util\/memory\.\1/g' src/Makefile.am
sed -i 's/utilmoneystr\.\(h\|cpp\)/util\/moneystr\.\1/g' src/Makefile.am
sed -i 's/utilstrencodings\.\(h\|cpp\)/util\/strencodings\.\1/g' src/Makefile.am
sed -i 's/utiltime\.\(h\|cpp\)/util\/time\.\1/g' src/Makefile.am
sed -i 's/-> util ->/-> util\/system ->/' test/lint/lint-circular-dependencies.sh
sed -i 's/src\/util\.cpp/src\/util\/system\.cpp/g' test/lint/lint-format-strings.py test/lint/lint-locale-dependence.sh
sed -i 's/src\/utilmoneystr\.cpp/src\/util\/moneystr\.cpp/g' test/lint/lint-locale-dependence.sh
sed -i 's/src\/utilstrencodings\.\(h\|cpp\)/src\/util\/strencodings\.\1/g' test/lint/lint-locale-dependence.sh
sed -i 's/src\\utilstrencodings\.cpp/src\\util\\strencodings\.cpp/' build_msvc/libbitcoinconsensus/libbitcoinconsensus.vcxproj
-END VERIFY SCRIPT-
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-BEGIN VERIFY SCRIPT-
for j in $(seq 1 5)
do
sed -i "s/ _${j}/ std::placeholders::_${j}/g" $(git grep --name-only " _${j}" -- '*.cpp' '*.h')
done
sed -i "s/boost::bind/std::bind/g" $(git grep --name-only boost::bind -- '*.cpp' '*.h')
sed -i "s/boost::ref/std::ref/g" $(git grep --name-only boost::ref -- '*.cpp' '*.h')
sed -i '/boost\/bind/d' $(git grep --name-only boost/bind)
-END VERIFY SCRIPT-
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range-based loop instead of std::transform
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