refactor Kakarot interface

[TAdev0]

Pull Request type

Please check the type of change your PR introduces:

• [ ] Bugfix
• [ ] Feature
• [ ] Code style update (formatting, renaming)
• [x] Refactoring (no functional changes, no API changes)
• [ ] Build-related changes
• [ ] Documentation content changes
• [ ] Other (please describe):

What is the current behavior?

Closes #772

Does this introduce a breaking change?

• [ ] Yes
• [x] No

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This change is 

[TAdev0]

@enitrat ready for review