## ePBS progress tracker

### Goals
- functioning PoC
- implementation in other client
- everyone learns

### PRS to Contribute

##### [WIP] ePBS
- https://github.com/prysmaticlabs/prysm/pull/13917

#### Consensus Spec EIP-7732
- https://github.com/ethereum/consensus-specs/tree/dev/specs/_features/eip7732

### Features Current WIP

| Name | Current feature |
| ------ | --------------- |
| Kira | |
| Caleb | Working Nimbus work getting done |
| Amaan | Working on nimbus for ePBS |

---

## Project Tasks for Nimbus

1. Constants and Types:
- [x] Add `PAYLOAD_ABSENT`, `PAYLOAD_PRESENT`, `PAYLOAD_WITHHELD`, `PAYLOAD_INVALID_STATUS`
- [x] Add `PTC_SIZE`
- [x] Add `INTERVALS_PER_SLOT`
- [x] Add `PROPOSER_SCORE_BOOST`, `PAYLOAD_WITHHOLD_BOOST`, `PAYLOAD_REVEAL_BOOST`
- [x] Add `DOMAIN_BEACON_BUILDER`, `DOMAIN_PTC_ATTESTER`
- [x] Add `MAX_PAYLOAD_ATTESTATIONS`

2. New Types:
- [x] `PayloadAttestationData`
- [x] `PayloadAttestation`
- [x] `PayloadAttestationMessage`
- [x] `IndexedPayloadAttestation`
- [x] `SignedExecutionPayloadHeader`
- [x] `ExecutionPayloadEnvelope`
- [x] `SignedExecutionPayloadEnvelope`

3. Modified Types:
- [x] Update `BeaconBlockBody` // name ends with EPBS
- [x] Update `ExecutionPayloadHeader` // name ends with EPBS
- [x] Update `BeaconState` // name ends with EPBS
- [ ] Update `LatestMessage`
- [x] Update `Store`

4. Helper Functions:
- [x] `remove_flag`
- [x] `is_valid_indexed_payload_attestation`
- [x] `is_parent_block_full`
- [x] `get_ptc`
- [x] Modified `get_attesting_indices`
- [x] `get_payload_attesting_indices`
- [x] `get_indexed_payload_attestation`

5. State Transition Functions:
- [ ] Modified `process_block`
- [x] Modified `process_withdrawals`
- [x] New `verify_execution_payload_header_signature`
- [ ] New `process_execution_payload_header`
- [ ] Modified `process_operations`
- [ ] New `process_payload_attestation`
- [x] Modified `process_execution_payload`
- [x] New `verify_execution_payload_envelope_signature`

6. Fork Choice Functions:
- [ ] `notify_ptc_messages`
- [ ] `is_payload_present`
- [x] `is_parent_node_full`
- [ ] Modified `get_ancestor`
- [ ] Modified `get_checkpoint_block`
- [ ] `is_supporting_vote`
- [ ] New `compute_proposer_boost`
- [ ] New `compute_withhold_boost`
- [ ] New `compute_reveal_boost`
- [ ] Modified `get_weight`
- [ ] Modified `get_head`

7. Validator Functions:
- [x] `get_ptc_assignment`
- [x] `get_payload_attestation_message_signature`

8. Builder Functions:
- [ ] Functions for constructing payload bid
- [ ] Functions for constructing execution payload envelope

9. P2P Updates:
- [x] Add new gossip topics: `execution_payload_header`, `execution_payload`, `payload_attestation_message`
- [ ] Implement validation logic for new topics
- [ ] Update `BeaconBlocksByRange` and `BeaconBlocksByRoot` for v3
- [ ] Implement `ExecutionPayloadEnvelopeByRoot` v1

10. Fork Logic:
- [ ] Modified `compute_fork_version`
- [x] `upgrade_to_eip7732`

11. Testing:
- [ ] Update existing tests
- [ ] Add new tests for EIP-7732 specific functionality

---

### Features Currently In Progress
- Feature 3: Description
- Feature 4: Description