Ethereum: Foundry Logging no longer working for contracts in lib folder?

Ethereum: Foundry Logging no longer working for contracts in lib folder

As a developer, it’s not uncommon to encounter issues with logging and debugging tools when writing smart contracts. In this article, we’ll explore an issue that has been reported by several users, causing foundry logging to fail for contracts stored in the lib directory.

Background

Foundry is a popular development tool used for testing and debugging Ethereum smart contracts. Its logging feature allows developers to view logs of contract executions, helping with debugging and testing. However, in recent updates, a change has been made that may be causing issues with foundry logging for contracts stored in the lib directory.

The Issue

The issue is related to how foundry handles logging when running tests on smart contracts stored in the lib directory. Specifically, it seems that the logging functionality is not being executed correctly, resulting in no log output.

Symptoms

To diagnose this issue, we’ve seen several users experiencing the following symptoms:

• No log output when running fuzz tests on contract code in the lib/ folder.

• Increased verbosity settings are not making a difference (e.g., -vv, -v, etc.).

• All verbosity levels up to -8 are being tried.

Steps to play

To play this issue, follow these steps:

• Create a new Ethereum project using a tool like Truffle or Remix.

• Write a simple contract in the lib/ directory (e.g., HelloWorld.sol) and compile it with the truffle compile command.

• Run fuzz tests on your contract code using foundry, e.g., foundry test --target=lib/HelloWorld.test

• Check the console output for any log messages.

Solutions

To resolve this issue, you can try the following solutions:

• Update Foundry: Ensure that you’re running the latest version of Foundry. You can check for updates by visiting the Foundry website and downloading an update package.

• Check verbosity settings: Increase the verbosity level to a higher value (e.g., -3 or -2) and see if it makes a difference. However, be aware that this may mask other issues with logging functionality.

• Use --debug flag

  : Try using the --debug flag when running fuzz tests, e.g., foundry test --target=lib/HelloWorld.test --debug

• Create a custom log output handler: You can create a custom log output handler for Foundry to configure logging behavior. This may involve modifying your contract code and the foundry configuration.

Conclusion

The issue with foundry logging for contracts stored in the lib directory is an understable problem that requires some troubleshooting effort. By following these steps, you should be able to identify and resolve this issue. Remember to update Foundry, increase verbosity settings (if applicable), or try custom log output handlers to get your contract code working with foundry logging.

Additional Resources

• If you’re experiencing issues with foundry logging on a different platform, please reach out to the Foundry community forum for further assistance.

• For more information on Ethereum development and smart contract testing, I recommend checking out the official Ethereum documentation and developer resources.