Remove DataAvailabilityView trait from ChildComponents (#5421)

* Remove DataAvailabilityView trait from ChildComponents

* PR reviews

* Update beacon_node/network/src/sync/block_lookups/common.rs

Co-authored-by: realbigsean <seananderson33@GMAIL.com>

* Merge branch 'unstable' of https://github.com/sigp/lighthouse into child_components_independent

beacon_node/beacon_chain/src/data_availability_checker.rs

@@ -15,6 +15,7 @@ pub use processing_cache::ProcessingComponents;
 use slasher::test_utils::E;
 use slog::{debug, error, Logger};
 use slot_clock::SlotClock;
+use ssz_types::FixedVector;
 use std::fmt;
 use std::fmt::Debug;
 use std::num::NonZeroUsize;
@@ -112,10 +113,11 @@ impl<T: BeaconChainTypes> DataAvailabilityChecker<T> {
 
     /// If there's no block, all possible ids will be returned that don't exist in the given blobs.
     /// If there no blobs, all possible ids will be returned.
-    pub fn get_missing_blob_ids<V: AvailabilityView<T::EthSpec>>(
+    pub fn get_missing_blob_ids<V>(
         &self,
         block_root: Hash256,
-        availability_view: &V,
+        block: &Option<Arc<SignedBeaconBlock<T::EthSpec>>>,
+        blobs: &FixedVector<Option<V>, <T::EthSpec as EthSpec>::MaxBlobsPerBlock>,
     ) -> MissingBlobs {
         let Some(current_slot) = self.slot_clock.now_or_genesis() else {
             error!(
@@ -128,49 +130,20 @@ impl<T: BeaconChainTypes> DataAvailabilityChecker<T> {
         let current_epoch = current_slot.epoch(T::EthSpec::slots_per_epoch());
 
         if self.da_check_required_for_epoch(current_epoch) {
-            match availability_view.get_cached_block() {
+            match block {
                 Some(cached_block) => {
                     let block_commitments = cached_block.get_commitments();
-                    let blob_commitments = availability_view.get_cached_blobs();
-
-                    let num_blobs_expected = block_commitments.len();
-                    let mut blob_ids = Vec::with_capacity(num_blobs_expected);
-
-                    // Zip here will always limit the number of iterations to the size of
-                    // `block_commitment` because `blob_commitments` will always be populated
-                    // with `Option` values up to `MAX_BLOBS_PER_BLOCK`.
-                    for (index, (block_commitment, blob_commitment_opt)) in block_commitments
-                        .into_iter()
-                        .zip(blob_commitments.iter())
+                    let blob_ids = blobs
+                        .iter()
+                        .take(block_commitments.len())
                         .enumerate()
-                    {
-                        // Always add a missing blob.
-                        let Some(blob_commitment) = blob_commitment_opt else {
-                            blob_ids.push(BlobIdentifier {
+                        .filter_map(|(index, blob_commitment_opt)| {
+                            blob_commitment_opt.is_none().then_some(BlobIdentifier {
                                 block_root,
                                 index: index as u64,
-                            });
-                            continue;
-                        };
-
-                        let blob_commitment = *blob_commitment.get_commitment();
-
-                        // Check for consistency, but this shouldn't happen, an availability view
-                        // should guaruntee consistency.
-                        if blob_commitment != block_commitment {
-                            error!(self.log,
-                                "Inconsistent availability view";
-                                "block_root" => ?block_root,
-                                "block_commitment" => ?block_commitment,
-                                "blob_commitment" => ?blob_commitment,
-                                "index" => index
-                            );
-                            blob_ids.push(BlobIdentifier {
-                                block_root,
-                                index: index as u64,
-                            });
-                        }
-                    }
+                            })
+                        })
+                        .collect();
                     MissingBlobs::KnownMissing(blob_ids)
                 }
                 None => {

beacon_node/beacon_chain/src/data_availability_checker/availability_view.rs

@@ -1,4 +1,3 @@
-use super::child_components::ChildComponents;
 use super::state_lru_cache::DietAvailabilityPendingExecutedBlock;
 use crate::blob_verification::KzgVerifiedBlob;
 use crate::block_verification_types::AsBlock;
@@ -195,14 +194,6 @@ impl_availability_view!(
     verified_blobs
 );
 
-impl_availability_view!(
-    ChildComponents,
-    Arc<SignedBeaconBlock<E>>,
-    Arc<BlobSidecar<E>>,
-    downloaded_block,
-    downloaded_blobs
-);
-
 pub trait GetCommitments<E: EthSpec> {
     fn get_commitments(&self) -> KzgCommitments<E>;
 }
@@ -381,23 +372,6 @@ pub mod tests {
         (block.into(), blobs, invalid_blobs)
     }
 
-    type ChildComponentsSetup<E> = (
-        Arc<SignedBeaconBlock<E>>,
-        FixedVector<Option<Arc<BlobSidecar<E>>>, <E as EthSpec>::MaxBlobsPerBlock>,
-        FixedVector<Option<Arc<BlobSidecar<E>>>, <E as EthSpec>::MaxBlobsPerBlock>,
-    );
-
-    pub fn setup_child_components(
-        block: SignedBeaconBlock<E>,
-        valid_blobs: FixedVector<Option<Arc<BlobSidecar<E>>>, <E as EthSpec>::MaxBlobsPerBlock>,
-        invalid_blobs: FixedVector<Option<Arc<BlobSidecar<E>>>, <E as EthSpec>::MaxBlobsPerBlock>,
-    ) -> ChildComponentsSetup<E> {
-        let blobs = FixedVector::from(valid_blobs.into_iter().cloned().collect::<Vec<_>>());
-        let invalid_blobs =
-            FixedVector::from(invalid_blobs.into_iter().cloned().collect::<Vec<_>>());
-        (Arc::new(block), blobs, invalid_blobs)
-    }
-
     pub fn assert_cache_consistent<V: AvailabilityView<E>>(cache: V) {
         if let Some(cached_block) = cache.get_cached_block() {
             let cached_block_commitments = cached_block.get_commitments();
@@ -530,11 +504,4 @@ pub mod tests {
         verified_blobs,
         setup_pending_components
     );
-    generate_tests!(
-        child_component_tests,
-        ChildComponents::<E>,
-        downloaded_block,
-        downloaded_blobs,
-        setup_child_components
-    );
 }

beacon_node/beacon_chain/src/data_availability_checker/child_components.rs

@@ -1,9 +1,8 @@
 use crate::block_verification_types::RpcBlock;
-use crate::data_availability_checker::AvailabilityView;
 use bls::Hash256;
 use std::sync::Arc;
 use types::blob_sidecar::FixedBlobSidecarList;
-use types::{EthSpec, SignedBeaconBlock};
+use types::{BlobSidecar, EthSpec, SignedBeaconBlock};
 
 /// For requests triggered by an `UnknownBlockParent` or `UnknownBlobParent`, this struct
 /// is used to cache components as they are sent to the network service. We can't use the
@@ -48,6 +47,22 @@ impl<E: EthSpec> ChildComponents<E> {
         cache
     }
 
+    pub fn merge_block(&mut self, block: Arc<SignedBeaconBlock<E>>) {
+        self.downloaded_block = Some(block);
+    }
+
+    pub fn merge_blob(&mut self, blob: Arc<BlobSidecar<E>>) {
+        if let Some(blob_ref) = self.downloaded_blobs.get_mut(blob.index as usize) {
+            *blob_ref = Some(blob);
+        }
+    }
+
+    pub fn merge_blobs(&mut self, blobs: FixedBlobSidecarList<E>) {
+        for blob in blobs.iter().flatten() {
+            self.merge_blob(blob.clone());
+        }
+    }
+
     pub fn clear_blobs(&mut self) {
         self.downloaded_blobs = FixedBlobSidecarList::default();
     }

beacon_node/network/src/sync/block_lookups/common.rs

@@ -8,7 +8,7 @@ use crate::sync::block_lookups::{
 use crate::sync::manager::{BlockProcessType, Id, SingleLookupReqId};
 use crate::sync::network_context::SyncNetworkContext;
 use beacon_chain::block_verification_types::RpcBlock;
-use beacon_chain::data_availability_checker::{AvailabilityView, ChildComponents};
+use beacon_chain::data_availability_checker::ChildComponents;
 use beacon_chain::{get_block_root, BeaconChainTypes};
 use lighthouse_network::rpc::methods::BlobsByRootRequest;
 use lighthouse_network::rpc::BlocksByRootRequest;
@@ -17,7 +17,7 @@ use std::ops::IndexMut;
 use std::sync::Arc;
 use std::time::Duration;
 use types::blob_sidecar::{BlobIdentifier, FixedBlobSidecarList};
-use types::{BlobSidecar, ChainSpec, EthSpec, Hash256, SignedBeaconBlock};
+use types::{BlobSidecar, ChainSpec, Hash256, SignedBeaconBlock};
 
 #[derive(Debug, Copy, Clone)]
 pub enum ResponseType {
@@ -371,27 +371,35 @@ impl<L: Lookup, T: BeaconChainTypes> RequestState<L, T> for BlobRequestState<L,
 
     fn verify_response_inner(
         &mut self,
-        _expected_block_root: Hash256,
+        expected_block_root: Hash256,
         blob: Option<Self::ResponseType>,
         peer_id: PeerId,
     ) -> Result<Option<FixedBlobSidecarList<T::EthSpec>>, LookupVerifyError> {
         match blob {
             Some(blob) => {
                 let received_id = blob.id();
-                if !self.requested_ids.contains(&received_id) {
-                    self.state.register_failure_downloading();
-                    Err(LookupVerifyError::UnrequestedBlobId(received_id))
-                } else {
-                    // State should remain downloading until we receive the stream terminator.
-                    self.requested_ids.remove(&received_id);
-                    let blob_index = blob.index;
 
-                    if blob_index >= T::EthSpec::max_blobs_per_block() as u64 {
-                        return Err(LookupVerifyError::InvalidIndex(blob.index));
-                    }
-                    *self.blob_download_queue.index_mut(blob_index as usize) = Some(blob);
-                    Ok(None)
+                if !self.requested_ids.contains(&received_id) {
+                    Err(LookupVerifyError::UnrequestedBlobId(received_id))
+                } else if !blob.verify_blob_sidecar_inclusion_proof().unwrap_or(false) {
+                    Err(LookupVerifyError::InvalidInclusionProof)
+                } else if blob.block_root() != expected_block_root {
+                    Err(LookupVerifyError::UnrequestedHeader)
+                } else {
+                    Ok(())
                 }
+                .map_err(|e| {
+                    self.state.register_failure_downloading();
+                    e
+                })?;
+
+                // State should remain downloading until we receive the stream terminator.
+                self.requested_ids.remove(&received_id);
+
+                // The inclusion proof check above ensures `blob.index` is < MAX_BLOBS_PER_BLOCK
+                let blob_index = blob.index;
+                *self.blob_download_queue.index_mut(blob_index as usize) = Some(blob);
+                Ok(None)
             }
             None => {
                 self.state.state = State::Processing { peer_id };

beacon_node/network/src/sync/block_lookups/mod.rs

@@ -570,6 +570,8 @@ impl<T: BeaconChainTypes> BlockLookups<T> {
             | ParentVerifyError::NotEnoughBlobsReturned
             | ParentVerifyError::ExtraBlocksReturned
             | ParentVerifyError::UnrequestedBlobId(_)
+            | ParentVerifyError::InvalidInclusionProof
+            | ParentVerifyError::UnrequestedHeader
             | ParentVerifyError::ExtraBlobsReturned
             | ParentVerifyError::InvalidIndex(_) => {
                 let e = e.into();

beacon_node/network/src/sync/block_lookups/parent_lookup.rs

@@ -38,6 +38,8 @@ pub enum ParentVerifyError {
     NotEnoughBlobsReturned,
     ExtraBlocksReturned,
     UnrequestedBlobId(BlobIdentifier),
+    InvalidInclusionProof,
+    UnrequestedHeader,
     ExtraBlobsReturned,
     InvalidIndex(u64),
     PreviousFailure { parent_root: Hash256 },
@@ -244,6 +246,8 @@ impl From<LookupVerifyError> for ParentVerifyError {
             E::NoBlockReturned => ParentVerifyError::NoBlockReturned,
             E::ExtraBlocksReturned => ParentVerifyError::ExtraBlocksReturned,
             E::UnrequestedBlobId(blob_id) => ParentVerifyError::UnrequestedBlobId(blob_id),
+            E::InvalidInclusionProof => ParentVerifyError::InvalidInclusionProof,
+            E::UnrequestedHeader => ParentVerifyError::UnrequestedHeader,
             E::ExtraBlobsReturned => ParentVerifyError::ExtraBlobsReturned,
             E::InvalidIndex(index) => ParentVerifyError::InvalidIndex(index),
             E::NotEnoughBlobsReturned => ParentVerifyError::NotEnoughBlobsReturned,

beacon_node/network/src/sync/block_lookups/single_block_lookup.rs

@@ -3,10 +3,10 @@ use crate::sync::block_lookups::common::{Lookup, RequestState};
 use crate::sync::block_lookups::Id;
 use crate::sync::network_context::SyncNetworkContext;
 use beacon_chain::block_verification_types::RpcBlock;
+use beacon_chain::data_availability_checker::ChildComponents;
 use beacon_chain::data_availability_checker::{
     AvailabilityCheckError, DataAvailabilityChecker, MissingBlobs,
 };
-use beacon_chain::data_availability_checker::{AvailabilityView, ChildComponents};
 use beacon_chain::BeaconChainTypes;
 use lighthouse_network::PeerAction;
 use slog::{trace, Logger};
@@ -32,6 +32,8 @@ pub enum LookupVerifyError {
     NoBlockReturned,
     ExtraBlocksReturned,
     UnrequestedBlobId(BlobIdentifier),
+    InvalidInclusionProof,
+    UnrequestedHeader,
     ExtraBlobsReturned,
     NotEnoughBlobsReturned,
     InvalidIndex(u64),
@@ -247,7 +249,7 @@ impl<L: Lookup, T: BeaconChainTypes> SingleBlockLookup<L, T> {
     /// Returns `true` if the block has already been downloaded.
     pub(crate) fn block_already_downloaded(&self) -> bool {
         if let Some(components) = self.child_components.as_ref() {
-            components.block_exists()
+            components.downloaded_block.is_some()
         } else {
             self.da_checker.has_block(&self.block_root())
         }
@@ -274,19 +276,25 @@ impl<L: Lookup, T: BeaconChainTypes> SingleBlockLookup<L, T> {
     pub(crate) fn missing_blob_ids(&self) -> MissingBlobs {
         let block_root = self.block_root();
         if let Some(components) = self.child_components.as_ref() {
-            self.da_checker.get_missing_blob_ids(block_root, components)
+            self.da_checker.get_missing_blob_ids(
+                block_root,
+                &components.downloaded_block,
+                &components.downloaded_blobs,
+            )
         } else {
-            let Some(processing_availability_view) =
-                self.da_checker.get_processing_components(block_root)
+            let Some(processing_components) = self.da_checker.get_processing_components(block_root)
             else {
                 return MissingBlobs::new_without_block(block_root, self.da_checker.is_deneb());
             };
-            self.da_checker
-                .get_missing_blob_ids(block_root, &processing_availability_view)
+            self.da_checker.get_missing_blob_ids(
+                block_root,
+                &processing_components.block,
+                &processing_components.blob_commitments,
+            )
         }
     }
 
-    /// Penalizes a blob peer if it should have blobs but didn't return them to us.     
+    /// Penalizes a blob peer if it should have blobs but didn't return them to us.
     pub fn penalize_blob_peer(&mut self, cx: &SyncNetworkContext<T>) {
         if let Ok(blob_peer) = self.blob_request_state.state.processing_peer() {
             cx.report_peer(