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20 changes: 19 additions & 1 deletion specs/eip4844/fork.md
Original file line number Diff line number Diff line change
Expand Up @@ -68,6 +68,24 @@ Since the `eip4844.BeaconState` format is equal to the `bellatrix.BeaconState` f
def upgrade_to_eip4844(pre: bellatrix.BeaconState) -> BeaconState:
# TODO: if Capella gets scheduled, add sync it with Capella.BeaconState
epoch = bellatrix.get_current_epoch(pre)
latest_execution_payload_header = ExecutionPayloadHeader(
parent_hash=pre.latest_execution_payload_header.parent_hash,
fee_recipient=pre.latest_execution_payload_header.fee_recipient,
state_root=pre.latest_execution_payload_header.state_root,
receipts_root=pre.latest_execution_payload_header.receipts_root,
logs_bloom=pre.latest_execution_payload_header.logs_bloom,
prev_randao=pre.latest_execution_payload_header.prev_randao,
block_number=pre.latest_execution_payload_header.block_number,
gas_limit=pre.latest_execution_payload_header.gas_limit,
gas_used=pre.latest_execution_payload_header.gas_used,
timestamp=pre.latest_execution_payload_header.timestamp,
extra_data=pre.latest_execution_payload_header.extra_data,
base_fee_per_gas=pre.latest_execution_payload_header.base_fee_per_gas,
excess_data_gas=uint256(0), # [New in EIP-4844]
block_hash=pre.latest_execution_payload_header.block_hash,
transactions_root=pre.latest_execution_payload_header.transactions_root,
withdrawals_root=pre.latest_execution_payload_header.withdrawals_root,
)
post = BeaconState(
# Versioning
genesis_time=pre.genesis_time,
Expand Down Expand Up @@ -108,7 +126,7 @@ def upgrade_to_eip4844(pre: bellatrix.BeaconState) -> BeaconState:
current_sync_committee=pre.current_sync_committee,
next_sync_committee=pre.next_sync_committee,
# Execution-layer
latest_execution_payload_header=pre.latest_execution_payload_header,
latest_execution_payload_header=latest_execution_payload_header,
)

return post
Expand Down