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# System prepended metadata

title: 'EPF Cohort-4 : Week-4 Update'

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Hey there, I am Chirag Mehta and these are my updates for week 4 (07/08 - 14/08).

This week was more about understanding the design specs proposed by the Mentors followed by reading about ePBS and PTC - an ePBS design.


Updates:

* Continued reading [eth2Book](https://eth2book.info/)
* Read the draft design specs proposed by Potuz and Terence.
* Had an call with Potuz, Terence and other EPF fellows to discuss more about the PTC design.
* Was analyzing the different ideas from the references about fee market designs, empty blocks and PT votes.
* Sub-topics to look on:   p2p specs, validator specs and builder onboarding.

References:

[Why enshrine Proposer-Builder Separation? A viable path to ePBS](https://ethresear.ch/t/why-enshrine-proposer-builder-separation-a-viable-path-to-epbs/15710)

[Payload-timeliness committee (PTC) – an ePBS design](https://ethresear.ch/t/payload-timeliness-committee-ptc-an-epbs-design/16054)

[Proposer/block builder separation-friendly fee market designs](https://ethresear.ch/t/proposer-block-builder-separation-friendly-fee-market-designs/9725)

[Optimised proposal commitment scheme](https://ethresear.ch/t/optimised-proposal-commitment-scheme/1314)

Next Steps:

* The Prysm team's recommended approach moving forward is to focus on a specific component within the sub-topics. This strategy aids in establishing achievable expectations and facilitating the planning process.

