1.9 KiB
1.9 KiB
Capella -- Fork Choice
Notice: This document is a work-in-progress for researchers and implementers.
Table of contents
Introduction
This is the modification of the fork choice according to the Capella upgrade.
Unless stated explicitly, all prior functionality from Bellatrix is inherited.
Custom types
Protocols
ExecutionEngine
Note: The notify_forkchoice_updated function is modified in the ExecutionEngine protocol at the Capella upgrade.
notify_forkchoice_updated
The only change made is to the PayloadAttributes container through the addition of withdrawals.
Otherwise, notify_forkchoice_updated inherits all prior functionality.
def notify_forkchoice_updated(self: ExecutionEngine,
head_block_hash: Hash32,
safe_block_hash: Hash32,
finalized_block_hash: Hash32,
payload_attributes: Optional[PayloadAttributes]) -> Optional[PayloadId]:
...
Helpers
Extended PayloadAttributes
PayloadAttributes is extended with the withdrawals field.
@dataclass
class PayloadAttributes(object):
timestamp: uint64
prev_randao: Bytes32
suggested_fee_recipient: ExecutionAddress
withdrawals: Sequence[Withdrawal] # new in Capella