fix - shutdown anvil-zksync zombies, review tests and fork method for latest anvil-zksync

[s3bc40]

Related issue: #45

What I did

The main goal was to kill the remaining anvil-zksync process, since they were not garbage collected. But I ended up adapting boa-zksync to the latest anvil-zksync and reviewed the fork system.

Key changes include the refactoring of environment setup functions, enhancements to the AnvilZKsync class for managing test nodes (lifecycle), and updates to dependencies and test configurations.

I tried at first to go for a context manager method inside AnvilZKsync but it was not adapted to our need, and it would have brought too many changes in other tools like Moccasin.

How I did it

Improvements to AnvilZKsync test node management:

• Introduced a global WeakSet to track active AnvilZKsync instances and ensure proper cleanup using an atexit handler. (boa_zksync/node.py, boa_zksync/node.pyR1-R31)
• Added dynamic port allocation logic to support parallel testing with pytest-xdist and fallback to a suggested port when available. (boa_zksync/node.py, boa_zksync/node.pyR76-R221)
• Enhanced the node startup process with a _build_command method for constructing commands and improved error handling during node shutdown. (boa_zksync/node.py, boa_zksync/node.pyR76-R221)

Enhancements to zkSync environment setup:

• Refactored functions like set_zksync_env, set_zksync_test_env, and set_zksync_fork to improve clarity and ensure consistent environment initialization. Added detailed docstrings for better documentation. (boa_zksync/__init__.py, boa_zksync/init.pyR12-R48)
• Deprecated the use of node_args in set_zksync_fork and updated the default behavior for block_identifier. (tests/conftest.py, tests/conftest.pyL33-R35)

Updates to forking and RPC handling:

• Modified the fork and fork_rpc methods to improve handling of RPC connections, ensure proper cleanup of existing nodes, and support new configurations. (boa_zksync/environment.py, [1] [2]
• Added a utility function is_port_free to check port availability, improving the robustness of test node setup. (boa_zksync/util.py, boa_zksync/util.pyR23-R47)

Dependency and configuration updates:

• Updated pyproject.toml temporarily since zkvyper does not support vyper>=0.4.2 (I'll go handle this).

Test updates:

• Adjusted test configurations to align with the refactored environment setup, including changes to the zksync_sepolia_fork fixture. (tests/conftest.py, tests/conftest.pyL33-R35)
• Updated call trace assertions in test_boa_loads.py to reflect changes in error messages and contract behavior. (tests/test_boa_loads.py, tests/test_boa_loads.pyL134-R151)

How to verify it

Run make test and see it all pass. You should have the latest anvil-zksync, and it should pass with the latest blocks.
You can also run make lint to be sure that the code complies.

Description for the changelog

• Enhanced AnvilZKsync Management: implemented automatic cleanup of test nodes, enabled dynamic port allocation for parallel testing, and improved overall node startup/shutdown robustness.

• Streamlined zkSync Environment: refactored environment setup functions (set_zksync_env, set_zksync_fork, etc.) for clearer usage and updated forking defaults.

• Improved Forking Logic: enhanced fork and fork_rpc methods for better RPC connection handling and more reliable node setup.

• Dependency & Test Adjustments: included a temporary dependency fix for zkvyper and updated test configurations/assertions to match the new system.

Cute Animal Picture

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	vyper@​0.4.3 ⏵ 0.4.2rc1

View full report

[s3bc40]

I let this here, but maybe we can remove it if we follow along with the latest?

[s3bc40]

I can remove it after the review

Suggested change

	# @dev deprecated in boa, use AnvilZKsync fork mode
	# return super().fork(url, reset_traces, block_identifier, debug, **kwargs)