### Dev Update - Week 12

This week, I've been brainstorming the best ways to implement the expected actions of a "builder" participating in the Ethereum protocol, with a focus on the Honest Builder specs from EIP-7732. My goal has been to ensure that all edge cases are covered, particularly when it comes to bid construction and handling adversarial scenarios.

I addressed existing feedback, such as making functions specific to EPBS (EIP-7732) states and improving code styling and performance. For example, I've optimized variable declarations to be more concise:

var validator_indices = newSeq[ValidatorIndex](PTC_SIZE)

instead of the previous, more verbose approach:

var
  validator_indices: newSeq[ValidatorIndex]
validator_indices.setLen(PTC_SIZE)

I've also completed the implementation of [`process_payload_attestation`](https://github.com/status-im/nimbus-eth2/blob/ecdb2ba65f3845669e9d888e5dfad74d7c7d9b76/beacon_chain/spec/state_transition_block_epbs.nim#L187), and have begun working on the fork choice specifications.

[PR Link](https://github.com/status-im/nimbus-eth2/pull/6443)
Mentor: [tersec](https://github.com/tersec)

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