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Permit a null LVH from an INVALID response to newPayload (#4037)

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## Issue Addressed

NA

## Proposed Changes

As discovered in #4034, Lighthouse is not accepting `latest_valid_hash == None` in an `INVALID` response to `newPayload`. The `null`/`None` response *was* illegal at one point, however it was added in https://github.com/ethereum/execution-apis/pull/254.

This PR brings Lighthouse in line with the standard and should fix the root cause of what #4034 patched around.

## Additional Info

NA
This commit is contained in:
Paul Hauner
2023-03-03 04:12:50 +00:00
parent 2b6348781a
commit cac3a66be4
5 changed files with 81 additions and 54 deletions
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41
beacon_node/beacon_chain/src/execution_payload.rs
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@@ -172,21 +172,34 @@ async fn notify_new_payload<'a, T: BeaconChainTypes>(
"method" => "new_payload",
);
// latest_valid_hash == 0 implies that this was the terminal block
// Hence, we don't need to run `BeaconChain::process_invalid_execution_payload`.
if latest_valid_hash == ExecutionBlockHash::zero() {
return Err(ExecutionPayloadError::RejectedByExecutionEngine { status }.into());
// Only trigger payload invalidation in fork choice if the
// `latest_valid_hash` is `Some` and non-zero.
//
// A `None` latest valid hash indicates that the EE was unable
// to determine the most recent valid ancestor. Since `block`
// has not yet been applied to fork choice, there's nothing to
// invalidate.
//
// An all-zeros payload indicates that an EIP-3675 check has
// failed regarding the validity of the terminal block. Rather
// than iterating back in the chain to find the terminal block
// and invalidating that, we simply reject this block without
// invalidating anything else.
if let Some(latest_valid_hash) =
latest_valid_hash.filter(|hash| *hash != ExecutionBlockHash::zero())
{
// This block has not yet been applied to fork choice, so the latest block that was
// imported to fork choice was the parent.
let latest_root = block.parent_root();
chain
.process_invalid_execution_payload(&InvalidationOperation::InvalidateMany {
head_block_root: latest_root,
always_invalidate_head: false,
latest_valid_ancestor: latest_valid_hash,
})
.await?;
}
// This block has not yet been applied to fork choice, so the latest block that was
// imported to fork choice was the parent.
let latest_root = block.parent_root();
chain
.process_invalid_execution_payload(&InvalidationOperation::InvalidateMany {
head_block_root: latest_root,
always_invalidate_head: false,
latest_valid_ancestor: latest_valid_hash,
})
.await?;
Err(ExecutionPayloadError::RejectedByExecutionEngine { status }.into())
}