https://www.goldcoinproject.org

Launched on BCT in 2013.

Goldcoin is an open-source cash payment system that scales on-chain without the need for L2 solutions. It enables instant payments to anyone, anywhere in the world, and can been sent with or without a transaction fee.

Goldcoin uses peer-to-peer technology to operate. The network capacity is 1,120 Tx/s with 2-min confirmations and 32 MB blocks. The network is SegWit-free and 0-Conf is fully supported. Starting Sep 15th, 2023 the currency will be backed by a real world treasury.

For more information, as well as an immediately useable, binary version of the Goldcoin Core software, see https://www.goldcoinproject.org.

Goldcoin Core is released under the terms of the MIT license. See COPYING for more information or see https://opensource.org/licenses/MIT.

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 Goldcoin Core.

The contribution workflow is described in CONTRIBUTING.md.

The #core-client channel on Discord should be used to discuss complicated or controversial changes before working on a patch set.

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 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 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/rpc-tests.py

The Travis CI system makes sure that every pull request is built for Windows, Linux, and OS X, and that unit/sanity tests are run automatically.

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.