# EPF6 - Week 13

## Overview

- Attended core dev call and shared updates
- Focused on the initial integration of Kurtosis into Simulation by starting to remove Docker-based components, after receiving PR feedback to make the old and new `interfaces.ts` consistent. A **new commit** was added to the PR as a direct answer to this feedback.
- **PR new commit**: Migration effort centered around interfaces.ts and Docker-specific types, replacing them with Kurtosis equivalents
- This transition introduced a series of errors that are currently being resolved

## Main points

### Refactoring work

- Began removing **Docker-based components** and types (`JobOptions`, `RunnerEnv`, etc.) from `interfaces.ts`
- Introduced **Kurtosis-specific** types (`KurtosisNetworkConfig`, `KurtosisServicesMap`) as replacements
- Refactored BeaconNode, ValidatorNode and ExecutionNode with Kurtosis types
- Updated references in Simulation to start depending on KurtosisRunner instead of the old Docker runner

### Errors encountered

- Removal of Docker-specific types broke imports in several files
- New Kurtosis types required adapting function signatures, which uncovered further mismatches
- `initWithKurtosisConfig()` still needs integration and adjustments to align with the new type structure

### Integration status

- Assertions remain **unchanged** (still expect NodePair input).
- As expected, early tests revealed gaps between the old Docker-based NodePair creation and the new Kurtosis-based approach
- Work ongoing to clean up errors and stabilization

## Learnings & Outcomes

- Transitioning from Docker types to Kurtosis types is not one-to-one, it requires **systematic interface** redesign
- Errors from broken imports highlighted just how deep **Docker dependencies** were embedded
- **Migration will be iterative**: remove old types in stages, replace with Kurtosis equivalents, then fix downstream breakages
- Reinforced that assertions can stay untouched, but the infrastructure needs extensive **refactoring**

## Week 14 TODOs

- Collect feedback on the new PR logic and approach before proceeding further
- Continue **resolving errors** caused by Docker type removals in `interfaces.ts` and related files.
- Work on completing the integration of `initWithKurtosisConfig()` into Simulation
- Validate that the new Kurtosis-based NodePair creation aligns with assertion requirements
- Refine `.yml` configuration mapping to ensure parity with existing `multiFork.test.ts`
- Collect team feedback on the direction of this integration before deeper refactors