# Week 20, 21 development update

During the last 2 weeks of the 5th EPF cohort, my work was focused on a design validation document (pseudocode), with a Python project and pytests attached, in order to prove the beacon-chain accounting model I proposed for the eODS feature.

As I mentioned in the [Accounting](https://hackmd.io/@kboomro/r1csps2MR#ACCOUNTING) section of eODS design notes, beacon chain accounting already exists under the current protocol, in the form of beacon chain operations, or beacon state mutators, e.g. process_deposit, increase_balance, etc.

Since Accounting is an important part of eODS model, it proved useful to group these functions in a virtual group based on functionality (i.e. accounting) rather than beacon-chain specification appartenance. [This document](https://hackmd.io/ZQocZMA9RyCZNlNHPGMeRg#Beacon-chain-accounting-under-current-Ethereum-protocol) is a study I made on beacon chain accounting under the current Ethereum protocol.

This is the document: [**Beacon chain accounting - eODS feature**](https://hackmd.io/@kboomro/HyRUZWLZyg)

## 4. Post EPF work for this topic

I plan to fix the remaining tests and functions (marked as BROKEN), so that all minimal eODS functionalities in terms of delegators and delegated validators are met, during next 4 weeks and refactor where appropriate, in order to have this Python implementation as close to the logic of beacon-chain specs as possible.