Add Capella & Deneb light client support (#4946)

* rebase and add comment

* conditional test

* test

* optimistic chould be working now

* finality should be working now

* try again

* try again

* clippy fix

* add lc bootstrap beacon api

* add lc optimistic/finality update to events

* fmt

* That error isn't occuring on my computer but I think this should fix it

* Merge branch 'unstable' into light_client_beacon_api_1

# Conflicts:
#	beacon_node/beacon_chain/src/events.rs
#	beacon_node/http_api/src/lib.rs
#	beacon_node/http_api/src/test_utils.rs
#	beacon_node/http_api/tests/main.rs
#	beacon_node/lighthouse_network/src/rpc/codec/ssz_snappy.rs
#	beacon_node/lighthouse_network/src/rpc/methods.rs
#	beacon_node/lighthouse_network/src/service/api_types.rs
#	beacon_node/network/src/beacon_processor/worker/rpc_methods.rs
#	beacon_node/tests/test.rs
#	common/eth2/src/types.rs
#	lighthouse/src/main.rs

* Add missing test file

* Update light client types to comply with Altair light client spec.

* Fix test compilation

* Merge branch 'unstable' into light_client_beacon_api_1

* Support deserializing light client structures for the Bellatrix fork

* Move `get_light_client_bootstrap` logic to `BeaconChain`. `LightClientBootstrap` API to return `ForkVersionedResponse`.

* Misc fixes.
- log cleanup
- move http_api config mutation to `config::get_config` for consistency
- fix light client API responses

* Add light client bootstrap API test and fix existing ones.

* Merge branch 'unstable' into light_client_beacon_api_1

* Fix test for `light-client-server` http api config.

* Appease clippy

* Add Altair light client SSZ tests

* Merge branch 'unstable' of https://github.com/sigp/lighthouse into light_client_beacon_api_1

* updates to light client header

* light client header from signed beacon block

* using options

* implement helper functions

* placeholder conversion from vec hash256 to exec branch

* add deneb

* using fixed vector

* remove unwraps

* by epoch

* compute merkle proof

* merkle proof

* update comments

* resolve merge conflicts

* linting

* Merge branch 'unstable' into light-client-ssz-tests

# Conflicts:
#	beacon_node/beacon_chain/src/beacon_chain.rs
#	consensus/types/src/light_client_bootstrap.rs
#	consensus/types/src/light_client_header.rs

* superstruct attempt

* superstruct changes

* lint

* altair

* update

* update

* changes to light_client_optimistic_ and finality

* merge unstable

* refactor

* resolved merge conflicts

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

* block_to_light_client_header fork aware

* fmt

* comment fix

* comment fix

* include merge fork, update deserialize_by_fork, refactor

* fmt

* pass by ref to prevent clone

* rename merkle proof fn

* add FIXME

* LightClientHeader TestRandom

* fix comments

* fork version deserialize

* merge unstable

* move fn arguments, fork name calc

* use task executor

* remove unneeded fns

* remove dead code

* add manual ssz decoding/encoding and add ssz_tests_by_fork macro

* merge deneb types with tests

* merge ssz tests, revert code deletion, cleanup

* move chainspec

* update ssz tests

* fmt

* light client ssz tests

* change to superstruct

* changes from feedback

* linting

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

* test fix

* cleanup

* Remove unused `derive`.

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

* beta compiler fix

* merge

beacon_node/beacon_chain/src/beacon_chain.rs

@@ -1347,11 +1347,12 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
         (parent_root, slot, sync_aggregate): LightClientProducerEvent<T::EthSpec>,
     ) -> Result<(), Error> {
         self.light_client_server_cache.recompute_and_cache_updates(
-            &self.log,
             self.store.clone(),
             &parent_root,
             slot,
             &sync_aggregate,
+            &self.log,
+            &self.spec,
         )
     }
 
@@ -6635,13 +6636,17 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
         &self,
         block_root: &Hash256,
     ) -> Result<Option<(LightClientBootstrap<T::EthSpec>, ForkName)>, Error> {
-        let Some((state_root, slot)) = self
-            .get_blinded_block(block_root)?
-            .map(|block| (block.state_root(), block.slot()))
-        else {
+        let handle = self
+            .task_executor
+            .handle()
+            .ok_or(BeaconChainError::RuntimeShutdown)?;
+
+        let Some(block) = handle.block_on(async { self.get_block(block_root).await })? else {
             return Ok(None);
         };
 
+        let (state_root, slot) = (block.state_root(), block.slot());
+
         let Some(mut state) = self.get_state(&state_root, Some(slot))? else {
             return Ok(None);
         };
@@ -6651,12 +6656,12 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
             .map_err(Error::InconsistentFork)?;
 
         match fork_name {
-            ForkName::Altair | ForkName::Merge => {
-                LightClientBootstrap::from_beacon_state(&mut state)
+            ForkName::Altair | ForkName::Merge | ForkName::Capella | ForkName::Deneb => {
+                LightClientBootstrap::from_beacon_state(&mut state, &block, &self.spec)
                     .map(|bootstrap| Some((bootstrap, fork_name)))
                     .map_err(Error::LightClientError)
             }
-            ForkName::Base | ForkName::Capella | ForkName::Deneb => Err(Error::UnsupportedFork),
+            ForkName::Base => Err(Error::UnsupportedFork),
         }
     }
 }