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This new function takes the populated sets of
direct and all conflicts computed in the current
mempool, assuming the replacements are a single
chunk, and computes a diagram check.
The diagram check only works against cluster
sizes of 2 or less, and fails if it encounters
a different topology.
Co-authored-by: Suhas Daftuar <sdaftuar@chaincode.com>
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It's preferable to use type-safe transaction identifiers to avoid
confusing txid and wtxid. The next commit will add a reference to this
set; we use this opportunity to change it to Txid ahead of time instead
of adding new uses of uint256.
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ancestors
47c4b1f52ab8d95d7deef83050bad49d1e3e5990 mempool: log/halt when CalculateMemPoolAncestors fails unexpectedly (stickies-v)
5481f65849313ff947f38433b1ac28285a7f7694 mempool: add AssumeCalculateMemPoolAncestors helper function (stickies-v)
f911bdfff95eba3793fffaf71a31cc8bfc6f80c9 mempool: use util::Result for CalculateMemPoolAncestors (stickies-v)
66e028f7399b6511f9b73b1cef54b6a6ac38a024 mempool: use util::Result for CalculateAncestorsAndCheckLimits (stickies-v)
Pull request description:
Upon reviewing the documentation for `CTxMemPool::CalculateMemPoolAncestors`, I noticed `setAncestors` was meant to be an `out` parameter but actually is an `in,out` parameter, as can be observed by adding `assert(setAncestors.empty());` as the first line in the function and running `make check`. This PR fixes this unexpected behaviour and introduces refactoring improvements to make intents and effects of the code more clear.
## Unexpected behaviour
This behaviour occurs only in the package acceptance path, currently only triggered by `testmempoolaccept` and `submitpackage` RPCs.
In `MemPoolAccept::AcceptMultipleTransactions()`, we first call `PreChecks()` and then `SubmitPackage()` with the same `Workspace ws` reference. `PreChecks` leaves `ws.m_ancestors` in a potentially non-empty state, before it is passed on to `MemPoolAccept::SubmitPackage`. `SubmitPackage` is the only place where `setAncestors` isn't guaranteed to be empty before calling `CalculateMemPoolAncestors`. The most straightforward fix is to just forcefully clear `setAncestors` at the beginning of CalculateMemPoolAncestors, which is done in the first bugfix commit.
## Improvements
### Return value instead of out-parameters
This PR updates the function signatures for `CTxMemPool::CalculateMemPoolAncestors` and `CTxMemPool::CalculateAncestorsAndCheckLimits` to use a `util::Result` return type and eliminate both the `setAncestors` `in,out`-parameter as well as the error string. It simplifies the code and makes the intent and effects more explicit.
### Observability
There are 7 instances where we currently call `CalculateMemPoolAncestors` without actually checking if the function succeeded because we assume that it can't fail, such as in [miner.cpp](https://github.com/bitcoin/bitcoin/blob/69b10212ea5370606c7a5aa500a70c36b4cbb58f/src/node/miner.cpp#L399). This PR adds a new wrapper `AssumeCalculateMemPoolAncestors` function that logs such unexpected failures, or in case of debug builds even halts the program. It's not crucial to the objective, more of an observability improvement that seems sensible to add on here.
ACKs for top commit:
achow101:
ACK 47c4b1f52ab8d95d7deef83050bad49d1e3e5990
w0xlt:
ACK https://github.com/bitcoin/bitcoin/pull/26289/commits/47c4b1f52ab8d95d7deef83050bad49d1e3e5990
glozow:
ACK 47c4b1f52ab8d95d7deef83050bad49d1e3e5990
furszy:
light code review ACK 47c4b1f5
aureleoules:
ACK 47c4b1f52ab8d95d7deef83050bad49d1e3e5990
Tree-SHA512: d908dad00d1a5645eb865c4877cc0bae74b9cd3332a3641eb4a285431aef119f9fc78172d38b55c592168a73dae83242e6af3348815f7b37cbe2d448a3a58648
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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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When CalculateMemPoolAncestors fails unexpectedly (e.g. it exceeds
ancestor/descendant limits even though we expect no limits to be applied),
add an error log entry for increased visibility. For debug builds,
the application will even halt completely since this is not supposed
to happen.
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Avoid using setAncestors outparameter, simplify function signatures
and avoid creating unused dummy strings.
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This change nukes the policy/fees->mempool circular dependency.
Easy to review using `diff --color-moved=dimmed-zebra`.
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Simplifies function signatures by removing repetition of all the
ancestor/descendant limits, and increases readability by being
more verbose by naming the limits, while still reducing the LoC.
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Our RBF policy is different from the rules specified in BIP125. For
example, the BIP does not mention Rule 6, and our Rule 4 uses the
(configurable) incremental relay feerate (distinct from the
minimum relay feerate). Those interested in our policy should refer to
doc/policy/mempool-replacements.md instead. These rules may also
continue to diverge with package RBF and other RBF improvements. Keep
references to the BIP125 signaling wrt sequence numbers, since that is
still correct and widely used. It is helpful to refer to this as "BIP125
signaling" since it is unambiguous and succint, especially if we have
multiple ways to signal replaceability in the future.
The rule numbers in doc/policy/mempool-replacements.md correspond
largely to those of BIP 125, so we can still refer to them like "Rule 5."
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Our RBF policy is different from the rules specified in BIP125 (refer to
doc/policy/mempool-replacements.md instead), and will continue to
diverge with package RBF. Keep references to BIP125 sequence number,
since that is still useful and correct.
-BEGIN VERIFY SCRIPT-
ren() { sed -i "s:\<$1\>:$2:g" $(git grep -l "\<$1\>" ./src ./test); }
ren m_allow_bip125_replacement m_allow_replacement
ren allow_bip125_replacement allow_replacement
ren MAX_BIP125_REPLACEMENT_CANDIDATES MAX_REPLACEMENT_CANDIDATES
-END VERIFY SCRIPT-
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Also fix includes using iwyu
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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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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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Document a few non-obvious things and delete no-longer-relevant comments
(e.g. about taking a lock that we're already holding).
No change in behavior.
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"Fee Delta" is already a term used for prioritizing transactions:
modified = base fees + delta
Here, delta also means the difference between original and modified replacement fees:
nDeltaFees = (original_base + original_delta) - (replacement_base + replacement_delta)
This is insanely confusing. Also, since mempool is no longer a member of a
class (MemPoolAccept.m_pool), the "m" prefix is unnecessary. The rest are
clarity/style-focused changes to already-touched lines.
-BEGIN VERIFY SCRIPT-
ren() { sed -i "s/\<$1\>/$2/g" src/policy/rbf* ; }
ren nDeltaFees additional_fees
ren m_pool pool
ren nSize replacement_vsize
ren nModifiedFees replacement_fees
ren nConflictingFees original_fees
ren oldFeeRate original_feerate
ren newFeeRate replacement_feerate
ren setAncestors ancestors
ren setIterConflicting iters_conflicting
ren setConflictsParents parents_of_conflicts
ren setConflicts direct_conflicts
ren allConflicting all_conflicts
sed -i "s/ hash\b/ txid/g" src/policy/rbf*
-END VERIFY SCRIPT-
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This checks that a transaction isn't trying to replace something it
supposedly depends on.
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Avoids reusing err_string.
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-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./
-END VERIFY SCRIPT-
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Co-authored-by: John Newbery <jonnynewbs@gmail.com>
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-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./
-END VERIFY SCRIPT-
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Adds the following util units and adds them to libbitcoin_util:
- `util/url.cpp` takes `urlDecode` from `httpserver.cpp`
- `util/error.cpp` takes `TransactionErrorString` from
`node/transaction.cpp` and `AmountHighWarn` and `AmountErrMsg` from
`ui_interface.cpp`
- `util/fees.cpp` takes `StringForFeeReason` and `FeeModeFromString` from `policy/fees.cpp`
- `util/rbf.cpp` takes `SignalsOptInRBF` from `policy/rbf.cpp`
- 'util/validation.cpp` takes `FormatStateMessage` and `strMessageMagic` from 'validation.cpp`
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-BEGIN VERIFY SCRIPT-
sed -i 's/enum DBErrors/enum class DBErrors/g' src/wallet/walletdb.h
git grep -l DB_ | xargs sed -i 's/DB_\(LOAD_OK\|CORRUPT\|NONCRITICAL_ERROR\|TOO_NEW\|LOAD_FAIL\|NEED_REWRITE\)/DBErrors::\1/g'
sed -i 's/^ DBErrors::/ /g' src/wallet/walletdb.h
sed -i 's/enum VerifyResult/enum class VerifyResult/g' src/wallet/db.h
sed -i 's/\(VERIFY_OK\|RECOVER_OK\|RECOVER_FAIL\)/VerifyResult::\1/g' src/wallet/db.cpp
sed -i 's/enum ThresholdState/enum class ThresholdState/g' src/versionbits.h
git grep -l THRESHOLD_ | xargs sed -i 's/THRESHOLD_\(DEFINED\|STARTED\|LOCKED_IN\|ACTIVE\|FAILED\)/ThresholdState::\1/g'
sed -i 's/^ ThresholdState::/ /g' src/versionbits.h
sed -i 's/enum SigVersion/enum class SigVersion/g' src/script/interpreter.h
git grep -l SIGVERSION_ | xargs sed -i 's/SIGVERSION_\(BASE\|WITNESS_V0\)/SigVersion::\1/g'
sed -i 's/^ SigVersion::/ /g' src/script/interpreter.h
sed -i 's/enum RetFormat {/enum class RetFormat {/g' src/rest.cpp
sed -i 's/RF_\(UNDEF\|BINARY\|HEX\|JSON\)/RetFormat::\1/g' src/rest.cpp
sed -i 's/^ RetFormat::/ /g' src/rest.cpp
sed -i 's/enum HelpMessageMode {/enum class HelpMessageMode {/g' src/init.h
git grep -l HMM_ | xargs sed -i 's/HMM_BITCOIN/HelpMessageMode::BITCOIN/g'
sed -i 's/^ HelpMessageMode::/ /g' src/init.h
sed -i 's/enum FeeEstimateHorizon/enum class FeeEstimateHorizon/g' src/policy/fees.h
sed -i 's/enum RBFTransactionState/enum class RBFTransactionState/g' src/policy/rbf.h
git grep -l RBF_ | xargs sed -i 's/RBF_TRANSACTIONSTATE_\(UNKNOWN\|REPLACEABLE_BIP125\|FINAL\)/RBFTransactionState::\1/g'
sed -i 's/^ RBFTransactionState::/ /g' src/policy/rbf.h
sed -i 's/enum BlockSource {/enum class BlockSource {/g' src/qt/clientmodel.h
git grep -l BLOCK_SOURCE_ | xargs sed -i 's/BLOCK_SOURCE_\(NONE\|REINDEX\|DISK\|NETWORK\)/BlockSource::\1/g'
sed -i 's/^ BlockSource::/ /g' src/qt/clientmodel.h
sed -i 's/enum FlushStateMode {/enum class FlushStateMode {/g' src/validation.cpp
sed -i 's/FLUSH_STATE_\(NONE\|IF_NEEDED\|PERIODIC\|ALWAYS\)/FlushStateMode::\1/g' src/validation.cpp
sed -i 's/^ FlushStateMode::/ /g' src/validation.cpp
sed -i 's/enum WitnessMode {/enum class WitnessMode {/g' src/test/script_tests.cpp
sed -i 's/WITNESS_\(NONE\|PKH\|SH\)/WitnessMode::\1/g' src/test/script_tests.cpp
sed -i 's/^ WitnessMode::/ /g' src/test/script_tests.cpp
-END VERIFY SCRIPT-
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-BEGIN VERIFY SCRIPT-
for f in \
src/*.cpp \
src/*.h \
src/bench/*.cpp \
src/bench/*.h \
src/compat/*.cpp \
src/compat/*.h \
src/consensus/*.cpp \
src/consensus/*.h \
src/crypto/*.cpp \
src/crypto/*.h \
src/crypto/ctaes/*.h \
src/policy/*.cpp \
src/policy/*.h \
src/primitives/*.cpp \
src/primitives/*.h \
src/qt/*.cpp \
src/qt/*.h \
src/qt/test/*.cpp \
src/qt/test/*.h \
src/rpc/*.cpp \
src/rpc/*.h \
src/script/*.cpp \
src/script/*.h \
src/support/*.cpp \
src/support/*.h \
src/support/allocators/*.h \
src/test/*.cpp \
src/test/*.h \
src/wallet/*.cpp \
src/wallet/*.h \
src/wallet/test/*.cpp \
src/wallet/test/*.h \
src/zmq/*.cpp \
src/zmq/*.h
do
base=${f%/*}/ relbase=${base#src/} sed -i "s:#include \"\(.*\)\"\(.*\):if test -e \$base'\\1'; then echo \"#include <\"\$relbase\"\\1>\\2\"; else echo \"#include <\\1>\\2\"; fi:e" $f
done
-END VERIFY SCRIPT-
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-BEGIN VERIFY SCRIPT-
sed -i 's/BOOST_FOREACH *(\(.*\),/for (\1 :/' ./src/*.h ./src/*.cpp ./src/*/*.h ./src/*/*.cpp ./src/*/*/*.h ./src/*/*/*.cpp ;
-END VERIFY SCRIPT-
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Three categories of modifications:
1)
1 instance of 'The Bitcoin Core developers \n',
1 instance of 'the Bitcoin Core developers\n',
3 instances of 'Bitcoin Core Developers\n', and
12 instances of 'The Bitcoin developers\n'
are made uniform with the 443 instances of 'The Bitcoin Core developers\n'
2)
3 instances of 'BitPay, Inc\.\n' are made uniform with the other 6
instances of 'BitPay Inc\.\n'
3)
4 instances where there was no '(c)' between the 'Copyright' and the year
where it deviates from the style of the local directory.
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Add "bip125-replaceable" output field to listtransactions and gettransaction
which indicates if an unconfirmed transaction, or any unconfirmed parent, is
signaling opt-in RBF according to BIP 125.
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