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Clarify load_parent genesis behaviour

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This commit is contained in:
Michael Sproul
2026-03-31 15:36:14 +11:00
parent e1dcd9e692
commit 3bc1d882f2
1 changed files with 24 additions and 30 deletions
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54
beacon_node/beacon_chain/src/block_verification.rs
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@@ -1960,37 +1960,31 @@ fn load_parent<T: BeaconChainTypes, B: AsBlock<T::EthSpec>>(
// Post-Gloas we must also fetch a state with the correct payload status. If the current
// block builds upon the payload of its parent block, then we know the parent block is FULL
// and we need to load the full state.
let (payload_status, parent_state_root) =
if block.as_block().fork_name_unchecked().gloas_enabled()
&& let Ok(parent_bid_block_hash) = parent_block.payload_bid_block_hash()
{
if !parent_bid_block_hash.into_root().is_zero()
&& block.as_block().is_parent_block_full(parent_bid_block_hash)
{
// TODO(gloas): loading the envelope here is not very efficient
let envelope = chain.store.get_payload_envelope(&root)?;
let state_root = if let Some(envelope) = envelope {
envelope.message.state_root
} else {
// The envelope may not be stored yet for the genesis/anchor
// block. Fall back to the block's state_root which is the
// post-payload state for the anchor per get_forkchoice_store.
if parent_block.slot() == chain.spec.genesis_slot {
parent_block.state_root()
} else {
return Err(BeaconChainError::DBInconsistent(format!(
"Missing envelope for parent block {root:?}",
))
.into());
}
};
(StatePayloadStatus::Full, state_root)
} else {
(StatePayloadStatus::Pending, parent_block.state_root())
}
} else {
(StatePayloadStatus::Pending, parent_block.state_root())
let (payload_status, parent_state_root) = if parent_block.slot() == chain.spec.genesis_slot
{
// Genesis state is always pending, there is no such thing as a "genesis envelope".
// See: https://github.com/ethereum/consensus-specs/issues/5043
(StatePayloadStatus::Pending, parent_block.state_root())
} else if !block.as_block().fork_name_unchecked().gloas_enabled() {
// All pre-Gloas parent states are pending.
(StatePayloadStatus::Pending, parent_block.state_root())
} else if let Ok(parent_bid_block_hash) = parent_block.payload_bid_block_hash()
&& block.as_block().is_parent_block_full(parent_bid_block_hash)
{
// Post-Gloas Full block case.
// TODO(gloas): loading the envelope here is not very efficient
let Some(envelope) = chain.store.get_payload_envelope(&root)? else {
return Err(BeaconChainError::DBInconsistent(format!(
"Missing envelope for parent block {root:?}",
))
.into());
};
let state_root = envelope.message.state_root;
(StatePayloadStatus::Full, state_root)
} else {
// Post-Gloas empty block case (also covers the Gloas fork transition).
(StatePayloadStatus::Pending, parent_block.state_root())
};
let (parent_state_root, state) = chain
.store
.get_advanced_hot_state(root, payload_status, block.slot(), parent_state_root)?