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262ab8ef7860d43cebc9d04721e3a075b4edf06e Add package evaluation fuzzer (Greg Sanders) Pull request description: This fuzzer target caught the issue in https://github.com/bitcoin/bitcoin/pull/28251 within 5 minutes on master branch, and an additional issue which I've applied a preliminary patch to cover. Fuzzer target does the following: 1) Picks mempool confgs, including max package size, count, mempool size, etc 2) Generates 1 to 26 transactions with arbitrary coins/fees, the first N-1 spending only confirmed outpoints 3) Nth transaction, if >1, sweeps all unconfirmed outpoints in mempool 4) If N==1, it may submit it through single-tx submission path, to allow for more interesting topologies 5) Otherwise submits through package submission interface 6) Repeat 1-5 a few hundred times per mempool instance In other words, it ends up building chains of txns in the mempool using parents-and-children packages, which is currently the topology supported on master. The test itself is a direct rip of tx_pool.cpp, with a number of assertions removed because they were failing for unknown reasons, likely due to the notification changes of single tx submission to package, which is used to track addition/removal of transactions in the test. I'll continue working on re-adding these assertions for further invariant testing. ACKs for top commit: murchandamus: ACK 262ab8ef7860d43cebc9d04721e3a075b4edf06e glozow: reACK 262ab8ef7860d43cebc9d04721e3a075b4edf06e dergoegge: tACK 262ab8ef7860d43cebc9d04721e3a075b4edf06e Tree-SHA512: 190784777d0f2361b051b3271db8f79b7927e3cab88596d2c30e556da721510bd17f6cc96f6bb03403bbf0589ad3f799fa54e63c1b2bd92a2084485b5e3e96a5
Bitcoin Core integration/staging tree
For an immediately usable, binary version of the Bitcoin Core software, see https://bitcoincore.org/en/download/.
What is Bitcoin Core?
Bitcoin Core connects to the Bitcoin peer-to-peer network to download and fully validate blocks and transactions. It also includes a wallet and graphical user interface, which can be optionally built.
Further information about Bitcoin Core is available in the doc folder.
License
Bitcoin Core is released under the terms of the MIT license. See COPYING for more information or see https://opensource.org/licenses/MIT.
Development Process
The master branch is regularly built (see doc/build-*.md for instructions) and tested, but it is not guaranteed to be
completely stable. Tags are created
regularly from release branches to indicate new official, stable release versions of Bitcoin Core.
The https://github.com/bitcoin-core/gui repository is used exclusively for the development of the GUI. Its master branch is identical in all monotree repositories. Release branches and tags do not exist, so please do not fork that repository unless it is for development reasons.
The contribution workflow is described in CONTRIBUTING.md and useful hints for developers can be found in doc/developer-notes.md.
Testing
Testing and code review is the bottleneck for development; we get more pull requests than we can review and test on short notice. Please be patient and help out by testing other people's pull requests, and remember this is a security-critical project where any mistake might cost people lots of money.
Automated Testing
Developers are strongly encouraged to write unit tests for new code, and to
submit new unit tests for old code. Unit tests can be compiled and run
(assuming they weren't disabled in configure) with: make check. Further details on running
and extending unit tests can be found in /src/test/README.md.
There are also regression and integration tests, written
in Python.
These tests can be run (if the test dependencies are installed) with: test/functional/test_runner.py
The CI (Continuous Integration) systems make sure that every pull request is built for Windows, Linux, and macOS, and that unit/sanity tests are run automatically.
Manual Quality Assurance (QA) Testing
Changes should be tested by somebody other than the developer who wrote the code. This is especially important for large or high-risk changes. It is useful to add a test plan to the pull request description if testing the changes is not straightforward.
Translations
Changes to translations as well as new translations can be submitted to Bitcoin Core's Transifex page.
Translations are periodically pulled from Transifex and merged into the git repository. See the translation process for details on how this works.
Important: We do not accept translation changes as GitHub pull requests because the next pull from Transifex would automatically overwrite them again.