merge-script d198635fa2
Merge bitcoin/bitcoin#34677: kernel: Chainparams and headerssync updates pre-31.0
44538f8ada868cb73ffa7a4bfb5267046d3f6b85 kernel: Add recent assumeutxo snapshot info (Ava Chow)
58c2e23fca05d201dfcea092ab032c943c9d5665 kernel: Update headerssync params (Ava Chow)
cf261b071f68b1967077a6d3baac10ea024e653a kernel: update chainTxData (Ava Chow)
8eaf1d26d446ecdc5c69b61334ee51a6f41050d3 kernel: update defaultAssumeValid and minimumChainWork (Ava Chow)
5ca0c55517d4c8e41a1dd9904545d82ee09adedf kernel: update assumed blockchain and chainstate sizes (Ava Chow)

Pull request description:

  Update chainparams and headerssync params per the release process.

  Also added new assumeutxo snapshots for each network. I've uploaded snapshots to https://achow101.com/files/utxo-snapshots/

ACKs for top commit:
  Sjors:
    ACK 44538f8ada868cb73ffa7a4bfb5267046d3f6b85
  fjahr:
    ACK 44538f8ada868cb73ffa7a4bfb5267046d3f6b85
  janb84:
    ACK 44538f8ada868cb73ffa7a4bfb5267046d3f6b85
  sipa:
    ACK 44538f8ada868cb73ffa7a4bfb5267046d3f6b85. I re-did all the mainnet parameters, but did not look closely at the other networks.
  jaonoctus:
    ACK 44538f8ada868cb73ffa7a4bfb5267046d3f6b85

Tree-SHA512: f9b6ccc967c5ef58f734245df459c3136491e9b6a0f6e36f4272bc0787e7b59eabe47a8c8b19a90267eca4a0b5851dfbf45153f96eac599c417f148b3cf264cf
2026-03-08 14:41:07 +00:00
2026-02-06 13:40:59 +00:00
2026-03-03 17:04:56 +00:00
2023-06-01 23:35:10 +05:30
2025-12-29 17:50:43 +00:00
2025-06-19 11:22:14 +01:00

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/license/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 during the generation of the build system) with: ctest. 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: build/test/functional/test_runner.py (assuming build is your build directory).

The CI (Continuous Integration) systems make sure that every pull request is tested on Windows, Linux, and macOS. The CI must pass on all commits before merge to avoid unrelated CI failures on new pull requests.

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.

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Bitcoin Core integration/staging tree
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