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Andrew Chow ab163b0fb5
Merge bitcoin/bitcoin#27823: init: return error when block index is non-contiguous, fix feature_init.py file perturbation 
d27b9a2248 test: fix feature_init.py file perturbation (Martin Zumsande)
ad66ca1e47 init: abort loading of blockindex in case of missing height. (Martin Zumsande)

Pull request description:

  When the block index database is non-contiguous due to file corruption (i.e. it contains indexes of height `x-1` and `x+1`, but not `x`), bitcoind can currently crash with an assert in `BuildSkip()` / `GetAncestor()` during `BlockManager::LoadBlockIndex()`:
  ```
  bitcoind: chain.cpp:112: const CBlockIndex* CBlockIndex::GetAncestor(int) const: Assertion `pindexWalk->pprev' failed.
  ```
  This PR changes it such that we instead return an `InitError` to the user.

  I stumbled upon this because I noticed that the file perturbation in `feature_init.py`  wasn't working as intended, which is fixed in the second commit:
  * Opening the file twice in one `with` statement would lead to `tf_read` being empty, so the test wouldn't perturb anything but replace the file with a new one. Fixed by first opening for read, then for write.
  * We need to restore the previous state after perturbations, so that only the current perturbation is active and not a mix of the current and previous ones.
  * I also added `checkblocks=200` to the startup parameters so that corruption in earlier blocks of `blk00000.dat` is detected during init verification and not ignored.

  After fixing `feature_init.py` like that I'd run into the `assert` mentioned above (so running the testfix from the second commit without the first one is a way to reproduce it).

ACKs for top commit:
  achow101:
    ACK d27b9a2248
  furszy:
    Code ACK d27b9a224
  fjahr:
    Code review ACK d27b9a2248

Tree-SHA512: 2e54da6030c5813c86bd58f816401e090bb43c5b834764a5e3c0e55dbfe09e423f88042cab823db3742088204b274d4ad2abf58a3832a4b18328b11a30bf7094
2023-10-04 15:36:57 -04:00
.github Merge bitcoin/bitcoin#28561: build: Update qt package up to 5.15.10 2023-10-04 18:37:31 +01:00
.tx qt: Bump Transifex slug for 26.x 2023-09-01 07:49:31 +01:00
build-aux/m4 build: Bump minimum supported GCC to g++-9 2023-05-18 12:24:40 +02:00
build_msvc build: Update qt package up to 5.15.10 2023-10-04 14:00:57 +01:00
ci ci: Print Linux kernel info 2023-10-03 16:37:43 +02:00
contrib Merge bitcoin/bitcoin#28507: contrib/bash-completions: use package naming conventions 2023-10-03 10:58:34 +01:00
depends build: Update qt package up to 5.15.10 2023-10-04 14:00:57 +01:00
doc Merge bitcoin/bitcoin#28561: build: Update qt package up to 5.15.10 2023-10-04 18:37:31 +01:00
share depends: Bump MacOS minimum runtime requirement to 11.0 2023-06-22 15:28:47 +00:00
src Merge bitcoin/bitcoin#27823: init: return error when block index is non-contiguous, fix feature_init.py file perturbation 2023-10-04 15:36:57 -04:00
test Merge bitcoin/bitcoin#27823: init: return error when block index is non-contiguous, fix feature_init.py file perturbation 2023-10-04 15:36:57 -04:00
.cirrus.yml Merge bitcoin/bitcoin#28353: ci: Remove /ro_base bind mount, Remove LC_ALL=C from s390x task 2023-08-30 16:23:39 +01:00
.editorconfig ci: Drop AppVeyor CI integration 2021-09-07 06:12:53 +03:00
.gitattributes Separate protocol versioning from clientversion 2014-10-29 00:24:40 -04:00
.gitignore build: produce a .zip for macOS distribution 2023-09-15 13:47:50 +01:00
.python-version ci: Use DOCKER_BUILDKIT for lint image 2023-07-16 13:18:18 +02:00
.style.yapf Update .style.yapf 2023-06-01 23:35:10 +05:30
autogen.sh build: make sure we can overwrite config.{guess,sub} 2023-06-13 14:58:43 +02:00
configure.ac build: remove dmg dependencies 2023-09-15 13:47:50 +01:00
CONTRIBUTING.md doc: Explain squashing with merge commits 2022-05-24 08:17:41 +02:00
COPYING doc: Update license year range to 2023 2022-12-24 11:40:16 +01:00
INSTALL.md doc: Added hyperlink for doc/build 2021-09-09 19:53:12 +05:30
libbitcoinconsensus.pc.in build: remove libcrypto as internal dependency in libbitcoinconsensus.pc 2019-11-19 15:03:44 +01:00
Makefile.am build: produce a .zip for macOS distribution 2023-09-15 13:47:50 +01:00
README.md doc: Explain Bitcoin Core in README.md 2022-05-10 07:49:09 +02:00
SECURITY.md doc: Add my key to SECURITY.md 2022-08-23 16:57:46 -04:00

README.md

Bitcoin Core integration/staging tree

https://bitcoincore.org

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.