dev: reorganize and cleanup indexer `transaction.ts`

[tcoratger]

Describe the Enhancement Request

At the moment, our transaction.ts file contains a lot of different logic in multiple functions.

https://github.com/kkrt-labs/kakarot-rpc/blob/main/indexer/src/types/transaction.ts

As many elements have been added recently, it would be useful to reorganize the contents of this file into modules, structures, and objects to achieve a more functional and idiomatic TypeScript implementation while preserving exactly the same functionalities.

Goals

• Reorganize the transaction.ts file for better readability and maintainability.
• Separate concerns by breaking down the file into modules, structures, and objects.
• Ensure the code is idiomatic to TypeScript.
• Preserve all existing functionalities.

Action Items

1. Modularization

   • Identify distinct functionalities and group them into appropriate modules.
   • Create separate files for different logical units.

2. Refactoring

   • Refactor functions to use TypeScript's features like interfaces, types, and classes.
   • Simplify complex functions for better readability.

3. Documentation

   • Add detailed comments and JSDoc for better understanding and maintainability.

4. Testing

   • Ensure all existing tests pass after refactoring.
   • Write new tests if necessary to cover any new code paths introduced during refactoring.

These action items are just ideas, feel free to challenge it and propose something better.

[isvallrod]

Hi, I would like to take a look at this issue and work on it

[dznes]

Hello, i would like to solve this issue.