Description

This pull request enhances error handling and test coverage for the distribution end block logic in the x/pse module. The most notable changes include improved handling of panics in the end blocker, more robust unit tests for error scenarios, and some minor refactoring for clarity.

Error Handling Improvements:

• The EndBlock method in AppModule now uses a deferred function to catch panics during distribution processing. If a panic occurs, it logs the error and disables all future distributions by setting the DistributionDisabled flag.

Test Coverage Enhancements:

• The TestDistribution_EndBlockFailure test now includes two subtests:
  • "transfer_error": Verifies that if a clearing account (e.g., team) is unfunded, the distribution fails gracefully and disables further distributions, with all recipient balances remaining zero and clearing accounts retaining their funds. [1] [2] [3] [4]
  • "panic_invalid_recipient": Simulates a panic caused by an invalid recipient address in the distribution parameters, ensuring the system disables distributions and leaves account balances unchanged.

Minor Refactoring:

• The signature of EndBlock is updated to explicitly name the return variable for better error handling with deferred functions.

Reviewers checklist:

• Try to write more meaningful comments with clear actions to be taken.
• Nit-picking should be unblocking. Focus on core issues.

Authors checklist

• Provide a concise and meaningful description
• Review the code yourself first, before making the PR.
• Annotate your PR in places that require explanation.
• Think and try to split the PR to smaller PR if it is big.

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