Fulu update to spec v1.6.0-alpha.4 (#7890)

Fulu update to spec [v1.6.0-alpha.4](https://github.com/ethereum/consensus-specs/releases/tag/v1.6.0-alpha.4).
- Make `number_of_columns` a preset
- Optimise `get_custody_groups` to avoid computing if cgc = 128
- Add support for additional typenum values in type_dispatch macro

beacon_node/network/src/sync/block_sidecar_coupling.rs

@@ -243,7 +243,6 @@ impl<E: EthSpec> RangeBlockComponentsRequest<E> {
                     column_to_peer_id,
                     expected_custody_columns,
                     *attempt,
-                    spec,
                 );
 
                 if let Err(CouplingError::DataColumnPeerFailure {
@@ -336,7 +335,6 @@ impl<E: EthSpec> RangeBlockComponentsRequest<E> {
         column_to_peer: HashMap<u64, PeerId>,
         expects_custody_columns: &[ColumnIndex],
         attempt: usize,
-        spec: &ChainSpec,
     ) -> Result<Vec<RpcBlock<E>>, CouplingError> {
         // Group data columns by block_root and index
         let mut data_columns_by_block =
@@ -415,7 +413,7 @@ impl<E: EthSpec> RangeBlockComponentsRequest<E> {
                     );
                 }
 
-                RpcBlock::new_with_custody_columns(Some(block_root), block, custody_columns, spec)
+                RpcBlock::new_with_custody_columns(Some(block_root), block, custody_columns)
                     .map_err(|e| CouplingError::InternalError(format!("{:?}", e)))?
             } else {
                 // Block has no data, expects zero columns

beacon_node/network/src/sync/network_context.rs

@@ -948,9 +948,10 @@ impl<T: BeaconChainTypes> SyncNetworkContext<T> {
         self.send_network_msg(NetworkMessage::SendRequest {
             peer_id,
             request: RequestType::DataColumnsByRoot(
-                request
-                    .clone()
-                    .try_into_request(self.fork_context.current_fork_name(), &self.chain.spec)?,
+                request.clone().try_into_request::<T::EthSpec>(
+                    self.fork_context.current_fork_name(),
+                    &self.chain.spec,
+                )?,
             ),
             app_request_id: AppRequestId::Sync(SyncRequestId::DataColumnsByRoot(id)),
         })?;

beacon_node/network/src/sync/network_context/custody.rs

@@ -13,16 +13,14 @@ use std::collections::HashSet;
 use std::time::{Duration, Instant};
 use std::{collections::HashMap, marker::PhantomData, sync::Arc};
 use tracing::{debug, warn};
-use types::EthSpec;
 use types::{DataColumnSidecar, Hash256, data_column_sidecar::ColumnIndex};
+use types::{DataColumnSidecarList, EthSpec};
 
 use super::{LookupRequestResult, PeerGroup, RpcResponseResult, SyncNetworkContext};
 
 const FAILED_PEERS_CACHE_EXPIRY_SECONDS: u64 = 5;
 const MAX_STALE_NO_PEERS_DURATION: Duration = Duration::from_secs(30);
 
-type DataColumnSidecarList<E> = Vec<Arc<DataColumnSidecar<E>>>;
-
 pub struct ActiveCustodyRequest<T: BeaconChainTypes> {
     block_root: Hash256,
     custody_id: CustodyId,

beacon_node/network/src/sync/network_context/requests/data_columns_by_root.rs

@@ -1,8 +1,8 @@
 use lighthouse_network::rpc::methods::DataColumnsByRootRequest;
+use ssz_types::VariableList;
 use std::sync::Arc;
 use types::{
     ChainSpec, DataColumnSidecar, DataColumnsByRootIdentifier, EthSpec, ForkName, Hash256,
-    RuntimeVariableList,
 };
 
 use super::{ActiveRequestItems, LookupVerifyError};
@@ -14,13 +14,12 @@ pub struct DataColumnsByRootSingleBlockRequest {
 }
 
 impl DataColumnsByRootSingleBlockRequest {
-    pub fn try_into_request(
+    pub fn try_into_request<E: EthSpec>(
         self,
         fork_name: ForkName,
         spec: &ChainSpec,
-    ) -> Result<DataColumnsByRootRequest, &'static str> {
-        let number_of_columns = spec.number_of_columns as usize;
-        let columns = RuntimeVariableList::new(self.indices, number_of_columns)
+    ) -> Result<DataColumnsByRootRequest<E>, &'static str> {
+        let columns = VariableList::new(self.indices)
             .map_err(|_| "Number of indices exceeds total number of columns")?;
         Ok(DataColumnsByRootRequest::new(
             vec![DataColumnsByRootIdentifier {

beacon_node/network/src/sync/tests/lookups.rs

@@ -1922,7 +1922,7 @@ fn custody_lookup_happy_path() {
     let id = r.expect_block_lookup_request(block.canonical_root());
     r.complete_valid_block_request(id, block.into(), true);
     // for each slot we download `samples_per_slot` columns
-    let sample_column_count = spec.samples_per_slot * spec.data_columns_per_group();
+    let sample_column_count = spec.samples_per_slot * spec.data_columns_per_group::<E>();
     let custody_ids =
         r.expect_only_data_columns_by_root_requests(block_root, sample_column_count as usize);
     r.complete_valid_custody_request(custody_ids, data_columns, false);

beacon_node/network/src/sync/tests/range.rs

@@ -427,7 +427,7 @@ impl TestRig {
             .chain
             .process_block(
                 block_root,
-                build_rpc_block(block.into(), &data_sidecars, &self.spec),
+                build_rpc_block(block.into(), &data_sidecars),
                 NotifyExecutionLayer::Yes,
                 BlockImportSource::RangeSync,
                 || Ok(()),
@@ -443,14 +443,13 @@ impl TestRig {
 fn build_rpc_block(
     block: Arc<SignedBeaconBlock<E>>,
     data_sidecars: &Option<DataSidecars<E>>,
-    spec: &ChainSpec,
 ) -> RpcBlock<E> {
     match data_sidecars {
         Some(DataSidecars::Blobs(blobs)) => {
             RpcBlock::new(None, block, Some(blobs.clone())).unwrap()
         }
         Some(DataSidecars::DataColumns(columns)) => {
-            RpcBlock::new_with_custody_columns(None, block, columns.clone(), spec).unwrap()
+            RpcBlock::new_with_custody_columns(None, block, columns.clone()).unwrap()
         }
         // Block has no data, expects zero columns
         None => RpcBlock::new_without_blobs(None, block),