Bitcoin

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. 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 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 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. 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. 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.