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Chaincoin Core staging tree 0.17.99

master is the working branch, for releases follow here

What is Chaincoin?

Chaincoin is an experimental new digital currency that enables anonymous, instant payments to anyone, anywhere in the world. Chaincoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Chaincoin Core is the name of the open source software which enables the use of this currency.

For more information, as well as an immediately useable, binary version of the Chaincoin Core software, see

What is CoinJoin(TM)?

CoinJoin(TM) is a trademark under EU legislation owned by PM-Tech.e.U. The owner grants permission to use CoinJoin(TM) for Chaincoin software until revoked.


Chaincoin Core is released under the terms of the MIT license. See COPYING for more information or see

Development Process

The master branch is regularly built and tested, but is not guaranteed to be completely stable. Tags are created regularly to indicate new official, stable release versions of Chaincoin Core.

The contribution workflow is described in and useful hints for developers can be found in doc/


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

There are also regression and integration tests of the RPC interface, written in Python, that are run automatically on the build server. These tests can be run (if the test dependencies are installed) with: qa/pull-tester/

The Travis CI system makes 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.


Changes to translations as well as new translations can be submitted to Chaincoin 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.

Translators should also follow the translation channel in our Discord.

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