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reorg
b4adc5ad6769e4a5a6179dfff271cd4c9dc47a5b [bugfix] update lockpoints correctly during reorg (glozow)
b6002b07a36f0d58dc6becd04bfcf78599056b7c MOVEONLY: update_lock_points to txmempool.h (glozow)
Pull request description:
I introduced a bug in #22677 (sorry! :sweat_smile:)
Mempool entries cache `LockPoints`, containing the first height/blockhash/`CBlockIndex*` at which the transaction becomes valid. During a reorg, we re-check timelocks on all mempool entries using `CheckSequenceLocks(useExistingLockPoints=false)` and remove any now-invalid entries. `CheckSequenceLocks()` also mutates the `LockPoints` passed in, and we update valid entries' `LockPoints` using `update_lock_points`. Thus, `update_lock_points(lp)` needs to be called right after `CheckSequenceLocks(lp)`, otherwise we lose the data in `lp`. I incorrectly assumed they could be called in separate loops.
The incorrect behavior introduced is: if we have a reorg in which a timelocked mempool transaction is still valid but becomes valid at a different block, the cached `LockPoints` will be incorrect.
This PR fixes the bug, adds a test, and adds an assertion at the end of `removeForReorg()` to check that all mempool entries' lockpoints are valid. You can reproduce the bug by running the test added in the [test] commit on the code before the [bugfix] commit.
ACKs for top commit:
jnewbery:
ACK b4adc5ad6769e4a5a6179dfff271cd4c9dc47a5b
vasild:
ACK b4adc5ad6769e4a5a6179dfff271cd4c9dc47a5b
mzumsande:
Code Review ACK b4adc5ad6769e4a5a6179dfff271cd4c9dc47a5b
hebasto:
ACK b4adc5ad6769e4a5a6179dfff271cd4c9dc47a5b
MarcoFalke:
re-ACK b4adc5ad6769e4a5a6179dfff271cd4c9dc47a5b 🏁
Tree-SHA512: 16b59f6ff8140d0229079ca1c6b04f2f4a00a2e49931275150e4f3fe5ac4ec109698b083fa6b223ba9511f328271cc1ab081263669d5da020af7fee83c13e401
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-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./
-END VERIFY SCRIPT-
Commits of previous years:
* 2020: fa0074e2d82928016a43ca408717154a1c70a4db
* 2019: aaaaad6ac95b402fe18d019d67897ced6b316ee0
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The lockpoints are not changed in this function.
There is no reason to pass a pointer.
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No behavior change.
Parameterize removeForReorg using a CChain and callable that
encapsulates validation logic. The mempool shouldn't need to know a
bunch of details about coinbase maturity and lock finality. Instead,
just pass in a callable function that says true/false. Breaks circular
dependency by removing txmempool's dependency on validation.
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txmempool.h to .cpp file
65aaf9495d19ea3fb875228a7e14aab6c1f2986d refactor: move `update_*` structs from txmempool.h to .cpp file (Sebastian Falbesoner)
9947ce62626c05bd186ae8a4864aa382f673ec1a refactor: use const reference for parents in `CTxMemPool::UpdateAncestorsOf` (Sebastian Falbesoner)
Pull request description:
These helpers are exclusively used in txmempool.cpp, hence they should also be moved there. The PR also contains a commit which fixes const-correctness for parents in `CTxMemPool::UpdateAncestorsOf` and declares them as reference to avoid a copy.
ACKs for top commit:
promag:
Code review ACK 65aaf9495d19ea3fb875228a7e14aab6c1f2986d. Verified move-only commit locally.
Tree-SHA512: 7ce29f3ba0e68b5355001f27725b00f6d54cc993015356eb40b61b8cdd17db49b980f4c3d798c8e0c940d245dc3a72c474bb9ff3c0ee971ead450786076812c2
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performance of check() and remove dependency on validation
082c5bf099c64e3d27abe9b68a71ce500b693e7e [refactor] pass coinsview and height to check() (glozow)
ed6115f1eae0eb4669601106a9aaff078a2f3a74 [mempool] simplify some check() logic (glozow)
9e8d7ad5d9cc4b013826daead9cee09aad539401 [validation/mempool] use Spend/AddCoin instead of UpdateCoins (glozow)
09d18916afb0ecae90700d4befd9d5dc52767970 MOVEONLY: remove single-use helper func CheckInputsAndUpdateCoins (glozow)
e8639ec26aaf4de3fae280963434bf1cf2017b6f [mempool] remove now-unnecessary code (glozow)
54c6f3c1da01090aee9691a2c2bee0984a054ce8 [mempool] speed up check() by using coins cache and iterating in topo order (glozow)
30e240f65e69c6dffcd033afc63895345bd51f53 [bench] Benchmark CTxMemPool::check() (glozow)
cb1407196fba648aa75504e3ab3d46aa0181563a [refactor/bench] make mempool_stress bench reusable and parameterizable (glozow)
Pull request description:
Remove the txmempool <-> validation circular dependency by removing txmempool's dependency on validation. There are two functions in txmempool that need validation right now: `check()` and `removeForReorg()`. This PR removes the dependencies in `check()`.
This PR also improves the performance of `CTxMemPool::check()` by walking through the entries exactly once, in ascending ancestorcount order, which guarantees that we see parents before children.
ACKs for top commit:
jnewbery:
reACK 082c5bf099c64e3d27abe9b68a71ce500b693e7e
GeneFerneau:
tACK [082c5bf](https://github.com/bitcoin/bitcoin/pull/23157/commits/082c5bf099c64e3d27abe9b68a71ce500b693e7e)
rajarshimaitra:
tACK https://github.com/bitcoin/bitcoin/pull/23157/commits/082c5bf099c64e3d27abe9b68a71ce500b693e7e
theStack:
Code-review ACK 082c5bf099c64e3d27abe9b68a71ce500b693e7e
Tree-SHA512: 40ac622af1627b5c3e6abb4f0f035d833265a8c5e8dc88faf5354875dfb5137f137825e54bbd2a2668ed37b145c5d02285f776402629f58596e51853a9a79d29
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Allowing callers to pass in a uint256 (which could be txid or wtxid)
but then always assuming that it's a txid is a footgunny interface.
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These helpers are exclusively used in txmempool.cpp, hence they
should also be moved there.
Can be reviewed with "--color-moved=dimmed-zebra".
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Removes check's dependency on validation.h
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Move amount.h to consensus/amount.h.
Renames, adds missing and removes uneeded includes.
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This removes a bunch of boilerplate, makes the code easier to read.
Also, C++11 member initialization avoids accidental uninitialized
members.
Can be reviewed with the git option "--word-diff-regex=." or with "git
difftool --tool=meld".
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listunspent output
6cb60f3e6d652ffa4cf570426a7cf1f690d15c45 doc/release-notes: Add new listunspent fields (Luke Dashjr)
0be2f17ef5649c2d77efbbbdd9222332b2ebf0d2 QA: Add tests for listunspent ancestor{count,size,fees} to mempool_packages (Luke Dashjr)
6966e80f453c46d5d0a923118205f19ac2f4e336 RPC: Add ancestor{count,size,fees} to listunspent output (Luke Dashjr)
3f77dfdaf0f0bfe0c4662a616d6943f31bdd5bf4 Expose ancestorsize and ancestorfees via getTransactionAncestry (Luke Dashjr)
Pull request description:
Requested by a user
ACKs for top commit:
prayank23:
reACK https://github.com/bitcoin/bitcoin/commit/6cb60f3e6d652ffa4cf570426a7cf1f690d15c45
fjahr:
Code review re-ACK 6cb60f3e6d652ffa4cf570426a7cf1f690d15c45
kiminuo:
ACK [6cb60f3](https://github.com/bitcoin/bitcoin/commit/6cb60f3e6d652ffa4cf570426a7cf1f690d15c45)
achow101:
Code Review ACK 6cb60f3e6d652ffa4cf570426a7cf1f690d15c45
naumenkogs:
ACK 6cb60f3e6d652ffa4cf570426a7cf1f690d15c45
darosior:
utACK 6cb60f3e6d652ffa4cf570426a7cf1f690d15c45
Tree-SHA512: 5d16e5799558691e5853ab7ea2cc85514cb45da3ce69134d855c71845beef32ec6af5ab28d4462683e9800c8ea126f162773a9d3d5660edac08fd8edbfeda173
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When calculating ancestor/descendant counts for transactions in the
package, as a heuristic, count every transaction in the package as an
ancestor and descendant of every other transaction in the package.
This may overestimate, but will not underestimate, the
ancestor/descendant counts. This shortcut still produces an accurate
count for packages of 1 parent + 1 child.
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This does not change existing behavior.
The ancestor/descendant limits are inclusive of the entries themselves,
but CalculateAncestorsAndCheckLimits() does not need access to them.
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testmempoolaccept
13650fe2e527bf0cf5d977bf5f3f1563b853ecdc [policy] detect unsorted packages (glozow)
9ef643e21b44f99f4bce54077788d0ad4d81f7cd [doc] add release note for package testmempoolaccept (glozow)
c4259f4b7ee23ef6e0ec82c5d5b9dfa9cadd5bed [test] functional test for packages in RPCs (glozow)
9ede34a6f20378e86c5289ebd20dd394a5915123 [rpc] allow multiple txns in testmempoolaccept (glozow)
ae8e6df709ff3d52b8e9918e09cacb64f83ae379 [policy] limit package sizes (glozow)
c9e1a26d1f17c8b98632b7796ffa8f8788b5a83c [fuzz] add ProcessNewPackage call in tx_pool fuzzer (glozow)
363e3d916cc036488783bb4bdcfdd3665aecf711 [test] unit tests for ProcessNewPackage (glozow)
cd9a11ac96c01e200d0086b2f011f4a614f5a705 [test] make submit optional in CreateValidMempoolTransaction (glozow)
2ef187941db439c5b3e529f08b6ab153ff061fc5 [validation] package validation for test accepts (glozow)
578148ded62828a9820398165c41670f4dbb523d [validation] explicit Success/Failure ctors for MempoolAcceptResult (glozow)
b88d77aec5e7bef5305a668d15031351c0548b4d [policy] Define packages (glozow)
249f43f3cc52b0ffdf2c47aad95ba9d195f6a45e [refactor] add option to disable RBF (glozow)
897e348f5987eadd8559981a973c045c471b3ad8 [coins/mempool] extend CCoinsViewMemPool to track temporary coins (glozow)
42cf8b25df07c45562b7210e0e15c3fd5edb2c11 [validation] make CheckSequenceLocks context-free (glozow)
Pull request description:
This PR enables validation dry-runs of packages through the `testmempoolaccept` RPC. The expectation is that the results returned from `testmempoolaccept` are what you'd get from test-then-submitting each transaction individually, in that order (this means the package is expected to be sorted in topological order, for now at least). The validation is also atomic: in the case of failure, it immediately halts and may return "unfinished" `MempoolAcceptResult`s for transactions that weren't fully validated. The API for 1 transaction stays the same.
**Motivation:**
- This allows you to test validity for transaction chains (e.g. with multiple spending paths and where you don't want to broadcast yet); closes #18480.
- It's also a first step towards package validation in a minimally invasive way.
- The RPC commit happens to close #21074 by clarifying the "allowed" key.
There are a few added restrictions on the packages, mostly to simplify the logic for areas that aren't critical to main package use cases:
- No package can have conflicts, i.e. none of them can spend the same inputs, even if it would be a valid BIP125 replacement.
- The package cannot conflict with the mempool, i.e. RBF is disabled.
- The total count of the package cannot exceed 25 (the default descendant count limit), and total size cannot exceed 101KvB (the default descendant size limit).
If you're looking for review comments and github isn't loading them, I have a gist compiling some topics of discussion [here](https://gist.github.com/glozow/c3acaf161c95bba491fce31585b2aaf7)
ACKs for top commit:
laanwj:
Code review re-ACK 13650fe2e527bf0cf5d977bf5f3f1563b853ecdc
jnewbery:
Code review ACK 13650fe2e527bf0cf5d977bf5f3f1563b853ecdc
ariard:
ACK 13650fe
Tree-SHA512: 8c5cbfa91a6c714e1c8710bb281d5ff1c5af36741872a7c5df6b24874d6272b4a09f816cb8a4c7de33ef8e1c2a2c252c0df5105b7802f70bc6ff821ed7cc1a2f
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-BEGIN VERIFY SCRIPT-
git rm src/optional.h
sed -i -e 's/Optional</std::optional</g' $(git grep -l 'Optional<' src)
sed -i -e 's/{nullopt}/{std::nullopt}/g' $(git grep -l 'nullopt' src)
sed -i -e 's/ nullopt;/ std::nullopt;/g' $(git grep -l 'nullopt' src)
sed -i -e 's/ nullopt)/ std::nullopt)/g' $(git grep -l 'nullopt' src)
sed -i -e 's/(nullopt)/(std::nullopt)/g' $(git grep -l 'nullopt' src)
sed -i -e 's/ nullopt,/ std::nullopt,/g' $(git grep -l 'nullopt' src)
sed -i -e 's/? nullopt :/? std::nullopt :/g' $(git grep -l 'nullopt' src)
sed -i -e 's/: nullopt}/: std::nullopt}/g' $(git grep -l 'nullopt' src)
sed -i -e '/optional.h \\/d' src/Makefile.am
sed -i -e '/#include <optional.h>/d' src/test/fuzz/autofile.cpp src/test/fuzz/buffered_file.cpp src/test/fuzz/node_eviction.cpp
sed -i -e 's/#include <optional.h>/#include <optional>/g' $(git grep -l '#include <optional.h>' src)
-END VERIFY SCRIPT-
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functions
e11b6496506246882df450586acf735dabedf731 validation: CVerifyDB::VerifyDB: Use locking annotation (Carl Dong)
03f75c42e12a272057adccb6f0077e71f971eeef validation: Use existing chain member in CChainState::LoadGenesisBlock (Carl Dong)
5e4af773809415b71a10e3120cc44854d61c4c19 validation: Use existing chain member in CChainState::AcceptBlock (Carl Dong)
fee73347c0015e4c24595c9708831d76cd6eec8c validation: Pass in chain to FindBlockPos+SaveBlockToDisk (Carl Dong)
a9d28bcd8d8f71d089322b1d631390352e31ee2b validation: Use *this in CChainState::ActivateBestChainStep (Carl Dong)
4744efc9bae8b22efb76152a3c045d054c880399 validation: Pass in chainstate to CTxMemPool::check (Carl Dong)
1fb7b2c59505a6b9768789f6caad215a0a22ef16 validation: Use *this in CChainState::InvalidateBlock (Carl Dong)
8cdb2f7e58dfd9a631a8cbb8f0ee7e8c0c304eb4 validation: Move LoadBlockIndexDB to CChainState (Carl Dong)
8b99efbcc08ab41caf657c6d730a27e6a91bc356 validation: Move invalid block handling to CChainState (Carl Dong)
2bdf37fe187ba6f090a0f5299b74d5d82cde4697 validation: Pass in chainstate to CVerifyDB::VerifyDB (Carl Dong)
31eac50c721dd3b0bd2347e76196bf16913e9be9 validation: Remove global ::VersionBitsTip{State,SinceHeight,Statistics} (Carl Dong)
63e4c7316a537900f525e221d8042587b443cc3d validation: Pass in chainstate to ::PruneBlockFilesManual (Carl Dong)
4bada76237d734c1de38d3bd58689caeefd5e8cb validation: Pass in chainstate to UpdateTip (Carl Dong)
a3ba08ba7dec0b016e42233cd4a061ba1a0e86c1 validation: Remove global ::{{Precious,Invalidate}Block,ResetBlockFailureFlags} (Carl Dong)
4927c9e6991b09a36a41aab93a0e05332d899611 validation: Remove global ::LoadGenesisBlock (Carl Dong)
9da106be4db692fa5db7b4de79f9cf7bfef37075 validation: Check chain tip is non-null in CheckFinalTx (Carl Dong)
Pull request description:
Overall PR: #20158 (tree-wide: De-globalize ChainstateManager)
Based on:
- [x] #20750 | [Bundle 2/n] Prune g_chainman usage in mempool-related validation functions
Note to reviewers:
1. This bundle may _apparently_ introduce usage of `g_chainman` or `::Chain(state|)Active()` globals, but these are resolved later on in the overall PR. [Commits of overall PR](https://github.com/bitcoin/bitcoin/pull/20158/commits)
2. There may be seemingly obvious local references to `ChainstateManager` or other validation objects which are not being used in callers of the current function in question, this is done intentionally to **_keep each commit centered around one function/method_** to ease review and to make the overall change systematic. We don't assume anything about our callers. Rest assured that once we are considering that particular caller in later commits, we will use the obvious local references. [Commits of overall PR](https://github.com/bitcoin/bitcoin/pull/20158/commits)
3. When changing a function/method that has many callers (e.g. `LookupBlockIndex` with 55 callers), it is sometimes easier (and less error-prone) to use a scripted-diff. When doing so, there will be 3 commits in sequence so that every commit compiles like so:
1. Add `new_function`, make `old_function` a wrapper of `new_function`, divert all calls to `old_function` to `new_function` **in the local module only**
2. Scripted-diff to divert all calls to `old_function` to `new_function` **in the rest of the codebase**
3. Remove `old_function`
Note to self:
- [x] Address: https://github.com/bitcoin/bitcoin/pull/20750#discussion_r579400663
ACKs for top commit:
laanwj:
Code review ACK e11b6496506246882df450586acf735dabedf731
Tree-SHA512: 205a451a741e32f17d5966de289f2f5a3f0817738c0087b70ff4755ddd217b53d01050ed396669bda2b1d216a88d927b9778777f9ff95ab1fe20e59c5f341776
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This is the only instance where validation reaches for something outside
of it.
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fd6580e405699ccb051fd2a34525e48d3253673d [refactor] txmempool: split epoch logic into class (Anthony Towns)
Pull request description:
Splits the epoch logic introduced in #17925 into a separate class.
Uses clang's thread safety annotations and encapsulates the data more strongly to reduce chances of bugs from API misuse.
ACKs for top commit:
jonatack:
ACK fd6580e405699ccb051fd2a34525e48d3253673d using clang thread safety annotations looks like a very good idea, and the encapsulation this change adds should improve robustness (and possible unit test-ability) of the code. Verified that changing some of the locking duly provoked build-time warnings with Clang 9 on Debian and that small changes in the new `Epoch` class were covered by failing functional test assertions in `mempool_updatefromblock.py`, `mempool_resurrect.py`, and `mempool_reorg.py`
hebasto:
re-ACK fd6580e405699ccb051fd2a34525e48d3253673d, since my [previous](https://github.com/bitcoin/bitcoin/pull/18017#pullrequestreview-569619362) review:
Tree-SHA512: 7004623faa02b56639aa05ab7a078320a6d8d54ec62d8022876221e33f350f47df51ddff056c0de5be798f8eb39b5c03c2d3f035698555d70abc218e950f2f8c
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Several other parameters are now redundant since they can be safely
obtained from the chainstate given that ::cs_main is locked. These are
now removed.
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Also, add missing lock annotations
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Currently, CTxMemPool::check locks CTxMemPool's own cs member, then
calls GetSpendHeight which locks cs_main. This can potentially cause an
undesirable lock invesion since CTxMemPool's cs is supposed to be locked
after cs_main.
This does not cause us any problems right now because all callers of
CTxMemPool already lock cs_main before calling CTxMemPool::check, which
means that the LOCK(cs_main) in GetSpendHeight becomes benign.
However, it is currently possible for new code to be added which calls
CTxMemPool::check without locking cs_main (which would be dangerous).
Therefore we should make it explicit that cs_main needs to be held
before calling CTxMemPool::check.
NOTE: After all review-only assertions are removed in "#20158 |
tree-wide: De-globalize ChainstateManager", and assuming that we
keep the changes in "validation: Pass in spendheight to
CTxMemPool::check", we can re-evaluate to see if this annotation
is still necessary.
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281fd1a4a032cded7f9ea9857e3e99fc793c714b Replace KeyIDHasher with SaltedSipHasher (Andrew Chow)
210b693db66e7c5b618014b5a287aee15af00045 Add generic SaltedSipHasher (Andrew Chow)
95e61c1cf2a91d041c8025306ba36f0ea2806894 Move Hashers to util/hasher.{cpp/h} (Andrew Chow)
Pull request description:
There are existing `SaltedOutPointHasher` and `SaltedTxidHasher` classes used for `std::unordered_map` and `std::unordered_set` that could be useful in other places in the codebase. So we these to their own `saltedhash.{cpp/h}` file. An existing `KeyIDHasher` is moved there too. Additionally, `ScriptIDHasher`, `SaltedPubkeyHasher`, and `SaltedScriptHasher` are added so that they can be used in future work.
`KeyIDHasher` and `ScriptIDHasher` are not salted so that equality comparisons of maps and sets keyed by `CKeyID` and `CScriptID` will actually work.
Split from #19602 (and a few other PRs/branches I have).
ACKs for top commit:
laanwj:
Code review ACK 281fd1a4a032cded7f9ea9857e3e99fc793c714b
jonatack:
ACK 281fd1a4a032cded7f9ea9857e3e99fc793c714b, code review, debug build and ran bitcoind after rebasing to master @ dff0f6f753ea
fjahr:
utACK 281fd1a4a032cded7f9ea9857e3e99fc793c714b
Tree-SHA512: bb03b231ccf3c9ecefc997b8da9c3770af4819f9be5b0a72997a103864e84046a2ac39b8eadf0dc9247bdccd53f86f433642e3a098882e6748341a9e7736271b
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Move the hashers that we use for hash tables to a common place.
Moved hashers:
- SaltedTxidHasher
- SaltedOutpointHasher
- FilterHeaderHasher
- SignatureCacheHasher
- BlockHasher
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Shorten the CTxMemPool initializer list using default initialization
for members that dont depend on the constuctor parameters.
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Since m_check_ratio is only set once and since the CTxMemPool object is
no longer a global variable, m_check_ratio can be passed into the
constructor of CTxMemPool. Since it is only read from after
initialization, m_check_ratio can also be made a const and hence no
longer needs to be guarded by the cs mutex.
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Use a ratio instead of a frequency that requires a double to int cast
for determining how often a mempool sanity check should run.
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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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a8a64acaf32ac21feeb885671772282b531ef9a2 [BroadcastTransaction] Remove unsafe move operator (Amiti Uttarwar)
125c0381266e0e05a408f8e1818501ab73d29110 [p2p] Remove dead code (Amiti Uttarwar)
fc66d0a65cdc52a3b259effe0c29b5eafb1b5ff5 [p2p] Check for nullptr before dereferencing pointer (Adam Jonas)
cb79b9dbf4cd06e17c8c65b36bf15c3ea2641de4 [mempool] Revert unbroadcast set to tracking just txid (Amiti Uttarwar)
Pull request description:
Addresses some outstanding review comments from #18044
- reverts unbroadcast txids to a set instead of a map (simpler, communicates intent better, takes less space, no efficiency advantages of map)
- adds safety around two touchpoints (check for nullptr before dereferencing pointer, remove an inaccurate std::move operator)
- removes some dead code
Links to comments on wtxid PR: [1](https://github.com/bitcoin/bitcoin/pull/18044#discussion_r460495254) [2](https://github.com/bitcoin/bitcoin/pull/18044#discussion_r460496023) [3](https://github.com/bitcoin/bitcoin/pull/18044#discussion_r463532611)
thanks to jnewbery & adamjonas for flagging these ! !
ACKs for top commit:
sdaftuar:
utACK a8a64acaf32ac21feeb885671772282b531ef9a2
naumenkogs:
utACK a8a64acaf32ac21feeb885671772282b531ef9a2
jnewbery:
utACK a8a64acaf32ac21feeb885671772282b531ef9a2
Tree-SHA512: 7be669cb30cc17fb9e06b50e636ef7887c6a27354697987e4e4d38dba4b8f50e175647587430cd9bc3295bec01ce8b1e6639a50a4249d8fff9b1ca1b9ead3277
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When I originally implemented the unbroadcast set in 18038, it just tracked
txids. After 18038 was merged, I offered a patch to 18044 to make the
unbroadcast changes compatible with wtxid relay. In this patch, I updated
`unbroadcast_txids` to a map of txid -> wtxid. Post merge review comments shed
light on the fact that this update was unnecessary, and distracting. So, this
commit updates the unbroadcast ids back to a set.
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CTxMemPool::GetMemPoolParents
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No change in behavior, the lock is already held at call sites.
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No change in behavior, the lock is already held at call sites.
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No change in behavior, the lock is already held at call sites.
Also `const uint256` refactored to `const uint256&`.
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No change in behavior, the lock is already held at call sites.
Also `const uint256` refactored to `const uint256&`.
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