zeta-chain/node

AI Summary: The issue proposes refactoring the `pubkey_test` file to adopt a Test-Driven Development (TDD) approach. This involves rewriting the tests and potentially the code they cover by first writing failing tests, then implementing the necessary code, and finally refactoring. The original comment also suggests creating a separate issue for this task.

AI Summary: This issue identifies a potential bug in zetaclient where chains might be registered and observed even if they are not supported, as the `IsSupported` check is only applied to one specific skipper. The expected outcome is to ensure that all relevant skippers incorporate this `IsSupported` check to prevent unsupported chains from being processed.