# Week 5 Updates 1. For this week I mostly focused on finalizing my EPF proposal. 2. Had call with my mentor regarding discussing the implementation details and plan to execute the milestone stated in the proposal. ## Proposal I finalized my proposal and adjusted it according to the discussion with mentors. ## Erigon interfaces: Since for the next week my target was to start writing code I started exploring how interaction and flow for communication occurs on the execution layer side. I found out that erigon uses gRPC exposed interfaces for communication among different components and have the api abstracted as gRPC interfaces. [execution.proto](https://github.com/erigontech/interfaces/blob/master/execution/execution.proto) [txpool.proto](https://github.com/erigontech/interfaces/blob/master/txpool/txpool.proto) I probably might need to update/ add new api endpoints to this interfaces repo when required. The only friction I feel like is that I would need to also fork these interfaces and create seperate PR's since its not embeded in the erigon's main client repo. ## Next week: For the next week I will start writing the code and introducing changes on the execution layer side required for FOCIL. I was also able to schedule bi weekly calls with my mentors so that I can keep them updated regarding my implementation progress and also get 1-1 feedback and get my confusions resolved.