# EPF6 Dev Updates – Week 7

I drafted one pr updating backfill related db repositories as suggested by matt: https://github.com/ChainSafe/lodestar/pull/8085.

Also made some changes as suggested by the reviewers. Next task is to write unit tests for new db repos and try running them locally.
There are some issues with using optional ssz types, will look more into it.

Apart from this I'm diving deep into Prysm codebase and getting familiar with golang along with it. My plan is to make some sort of architectural design flow diagram or design notes which will serve as a good resource for me, my mentor to follow-up and also people working around this.

Week 8 goals:
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- Prysm backfill code go through and prepare architecture design notes
- Write unit tests