d587c4fe61
This was dropped in a376b6607fe5e6406371f44254960e891ee5ee8d, as improvement in dust checking. Now that dust-checking is done, we still need to check if the sender has the minimum value, as decrease balance just clips to 0. See be86f966f87958856584b3f20c095abf910a3d0c for older dust-creation problem work around, which was dropped in the above. The bug enabled you to transfer your full balance to someone else, and pay the same amount in fee, possibly to a puppet proposer to collect back funds. Effectively enabling printing of money. Silly bug, good to fix and introduce tests for.
Eth 2.0 Executable Python Spec (PySpec)
The executable Python spec is built from the Eth 2.0 specification, complemented with the necessary helper functions for hashing, BLS, and more.
With this executable spec, test-generators can easily create test-vectors for client implementations, and the spec itself can be verified to be consistent and coherent through sanity tests implemented with pytest.
Building
All the dynamic parts of the spec can be build at once with make pyspec.
Alternatively, you can build a sub-set of the pyspec: make phase0.
Or, to build a single file, specify the path, e.g. make test_libs/pyspec/eth2spec/phase0/spec.py.
Py-tests
After building, you can install the dependencies for running the pyspec tests with make install_test.
These tests are not intended for client-consumption. These tests are sanity tests, to verify if the spec itself is consistent.
How to run tests
Automated
Run make test from the root of the specs repository (after running make install_test if have not before).
Manual
From within the pyspec folder:
Install dependencies:
python3 -m venv venv
. venv/bin/activate
pip3 install -r requirements-testing.txt
Note: Make sure to run make -B pyspec from the root of the specs repository,
to build the parts of the pyspec module derived from the markdown specs.
The -B flag may be helpful to force-overwrite the pyspec output after you made a change to the markdown source files.
Run the tests:
pytest --config=minimal eth2spec
Note the package-name, this is to locate the tests.
How to view code coverage report
Run make open_cov from the root of the specs repository after running make test to open the html code coverage report.
Contributing
Contributions are welcome, but consider implementing your idea as part of the spec itself first. The pyspec is not a replacement.
License
Same as the spec itself; see LICENSE file in the specs repository root.