Support SSZ request body for POST /beacon/blinded_blocks endpoints (v1 & v2) (#4504)

## Issue Addressed

#4262 

## Proposed Changes

add SSZ support in request body for POST /beacon/blinded_blocks endpoints (v1 & v2)

## Additional Info

beacon_node/http_api/src/lib.rs

@@ -1391,6 +1391,46 @@ pub fn serve<T: BeaconChainTypes>(
             },
         );
 
+    // POST beacon/blocks
+    let post_beacon_blinded_blocks_ssz =
+        eth_v1
+            .and(warp::path("beacon"))
+            .and(warp::path("blinded_blocks"))
+            .and(warp::path::end())
+            .and(warp::body::bytes())
+            .and(chain_filter.clone())
+            .and(network_tx_filter.clone())
+            .and(log_filter.clone())
+            .and_then(
+                |block_bytes: Bytes,
+                 chain: Arc<BeaconChain<T>>,
+                 network_tx: UnboundedSender<NetworkMessage<T::EthSpec>>,
+                 log: Logger| async move {
+                    let block =
+                        match SignedBeaconBlock::<T::EthSpec, BlindedPayload<_>>::from_ssz_bytes(
+                            &block_bytes,
+                            &chain.spec,
+                        ) {
+                            Ok(data) => data,
+                            Err(e) => {
+                                return Err(warp_utils::reject::custom_bad_request(format!(
+                                    "{:?}",
+                                    e
+                                )))
+                            }
+                        };
+                    publish_blocks::publish_blinded_block(
+                        block,
+                        chain,
+                        &network_tx,
+                        log,
+                        BroadcastValidation::default(),
+                    )
+                    .await
+                    .map(|()| warp::reply().into_response())
+                },
+            );
+
     let post_beacon_blinded_blocks_v2 = eth_v2
         .and(warp::path("beacon"))
         .and(warp::path("blinded_blocks"))
@@ -1428,6 +1468,58 @@ pub fn serve<T: BeaconChainTypes>(
             },
         );
 
+    let post_beacon_blinded_blocks_v2_ssz =
+        eth_v2
+            .and(warp::path("beacon"))
+            .and(warp::path("blinded_blocks"))
+            .and(warp::query::<api_types::BroadcastValidationQuery>())
+            .and(warp::path::end())
+            .and(warp::body::bytes())
+            .and(chain_filter.clone())
+            .and(network_tx_filter.clone())
+            .and(log_filter.clone())
+            .then(
+                |validation_level: api_types::BroadcastValidationQuery,
+                 block_bytes: Bytes,
+                 chain: Arc<BeaconChain<T>>,
+                 network_tx: UnboundedSender<NetworkMessage<T::EthSpec>>,
+                 log: Logger| async move {
+                    let block =
+                        match SignedBeaconBlock::<T::EthSpec, BlindedPayload<_>>::from_ssz_bytes(
+                            &block_bytes,
+                            &chain.spec,
+                        ) {
+                            Ok(data) => data,
+                            Err(_) => {
+                                return warp::reply::with_status(
+                                    StatusCode::BAD_REQUEST,
+                                    eth2::StatusCode::BAD_REQUEST,
+                                )
+                                .into_response();
+                            }
+                        };
+                    match publish_blocks::publish_blinded_block(
+                        block,
+                        chain,
+                        &network_tx,
+                        log,
+                        validation_level.broadcast_validation,
+                    )
+                    .await
+                    {
+                        Ok(()) => warp::reply().into_response(),
+                        Err(e) => match warp_utils::reject::handle_rejection(e).await {
+                            Ok(reply) => reply.into_response(),
+                            Err(_) => warp::reply::with_status(
+                                StatusCode::INTERNAL_SERVER_ERROR,
+                                eth2::StatusCode::INTERNAL_SERVER_ERROR,
+                            )
+                            .into_response(),
+                        },
+                    }
+                },
+            );
+
     let block_id_or_err = warp::path::param::<BlockId>().or_else(|_| async {
         Err(warp_utils::reject::custom_bad_request(
             "Invalid block ID".to_string(),
@@ -4073,7 +4165,12 @@ pub fn serve<T: BeaconChainTypes>(
             warp::post().and(
                 warp::header::exact("Content-Type", "application/octet-stream")
                     // Routes which expect `application/octet-stream` go within this `and`.
-                    .and(post_beacon_blocks_ssz.uor(post_beacon_blocks_v2_ssz))
+                    .and(
+                        post_beacon_blocks_ssz
+                            .uor(post_beacon_blocks_v2_ssz)
+                            .uor(post_beacon_blinded_blocks_ssz)
+                            .uor(post_beacon_blinded_blocks_v2_ssz),
+                    )
                     .uor(post_beacon_blocks)
                     .uor(post_beacon_blinded_blocks)
                     .uor(post_beacon_blocks_v2)

beacon_node/http_api/tests/broadcast_validation_tests.rs

@@ -851,6 +851,49 @@ pub async fn blinded_gossip_full_pass() {
         .block_is_known_to_fork_choice(&block.canonical_root()));
 }
 
+// This test checks that a block that is valid from both a gossip and consensus perspective is accepted when using `broadcast_validation=gossip`.
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+pub async fn blinded_gossip_full_pass_ssz() {
+    /* this test targets gossip-level validation */
+    let validation_level: Option<BroadcastValidation> = Some(BroadcastValidation::Gossip);
+
+    // Validator count needs to be at least 32 or proposer boost gets set to 0 when computing
+    // `validator_count // 32`.
+    let validator_count = 64;
+    let num_initial: u64 = 31;
+    let tester = InteractiveTester::<E>::new(None, validator_count).await;
+
+    // Create some chain depth.
+    tester.harness.advance_slot();
+    tester
+        .harness
+        .extend_chain(
+            num_initial as usize,
+            BlockStrategy::OnCanonicalHead,
+            AttestationStrategy::AllValidators,
+        )
+        .await;
+    tester.harness.advance_slot();
+
+    let slot_a = Slot::new(num_initial);
+    let slot_b = slot_a + 1;
+
+    let state_a = tester.harness.get_current_state();
+    let (block, _): (SignedBlindedBeaconBlock<E>, _) =
+        tester.harness.make_blinded_block(state_a, slot_b).await;
+
+    let response: Result<(), eth2::Error> = tester
+        .client
+        .post_beacon_blinded_blocks_v2_ssz(&block, validation_level)
+        .await;
+
+    assert!(response.is_ok());
+    assert!(tester
+        .harness
+        .chain
+        .block_is_known_to_fork_choice(&block.canonical_root()));
+}
+
 /// This test checks that a block that is **invalid** from a gossip perspective gets rejected when using `broadcast_validation=consensus`.
 #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
 pub async fn blinded_consensus_invalid() {

beacon_node/http_api/tests/tests.rs

@@ -2578,6 +2578,66 @@ impl ApiTester {
         }
     }
 
+    pub async fn test_blinded_block_production_ssz<Payload: AbstractExecPayload<E>>(&self) {
+        let fork = self.chain.canonical_head.cached_head().head_fork();
+        let genesis_validators_root = self.chain.genesis_validators_root;
+
+        for _ in 0..E::slots_per_epoch() * 3 {
+            let slot = self.chain.slot().unwrap();
+            let epoch = self.chain.epoch().unwrap();
+
+            let proposer_pubkey_bytes = self
+                .client
+                .get_validator_duties_proposer(epoch)
+                .await
+                .unwrap()
+                .data
+                .into_iter()
+                .find(|duty| duty.slot == slot)
+                .map(|duty| duty.pubkey)
+                .unwrap();
+            let proposer_pubkey = (&proposer_pubkey_bytes).try_into().unwrap();
+
+            let sk = self
+                .validator_keypairs()
+                .iter()
+                .find(|kp| kp.pk == proposer_pubkey)
+                .map(|kp| kp.sk.clone())
+                .unwrap();
+
+            let randao_reveal = {
+                let domain = self.chain.spec.get_domain(
+                    epoch,
+                    Domain::Randao,
+                    &fork,
+                    genesis_validators_root,
+                );
+                let message = epoch.signing_root(domain);
+                sk.sign(message).into()
+            };
+
+            let block = self
+                .client
+                .get_validator_blinded_blocks::<E, Payload>(slot, &randao_reveal, None)
+                .await
+                .unwrap()
+                .data;
+
+            let signed_block = block.sign(&sk, &fork, genesis_validators_root, &self.chain.spec);
+
+            self.client
+                .post_beacon_blinded_blocks_ssz(&signed_block)
+                .await
+                .unwrap();
+
+            // This converts the generic `Payload` to a concrete type for comparison.
+            let head_block = SignedBeaconBlock::from(signed_block.clone());
+            assert_eq!(head_block, signed_block);
+
+            self.chain.slot_clock.set_slot(slot.as_u64() + 1);
+        }
+    }
+
     pub async fn test_blinded_block_production_no_verify_randao<Payload: AbstractExecPayload<E>>(
         self,
     ) -> Self {
@@ -4704,6 +4764,14 @@ async fn blinded_block_production_full_payload_premerge() {
         .await;
 }
 
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn blinded_block_production_ssz_full_payload_premerge() {
+    ApiTester::new()
+        .await
+        .test_blinded_block_production_ssz::<FullPayload<_>>()
+        .await;
+}
+
 #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
 async fn blinded_block_production_with_skip_slots_full_payload_premerge() {
     ApiTester::new()
@@ -4713,6 +4781,15 @@ async fn blinded_block_production_with_skip_slots_full_payload_premerge() {
         .await;
 }
 
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn blinded_block_production_ssz_with_skip_slots_full_payload_premerge() {
+    ApiTester::new()
+        .await
+        .skip_slots(E::slots_per_epoch() * 2)
+        .test_blinded_block_production_ssz::<FullPayload<_>>()
+        .await;
+}
+
 #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
 async fn blinded_block_production_no_verify_randao_full_payload_premerge() {
     ApiTester::new()

common/eth2/src/lib.rs

@@ -742,6 +742,26 @@ impl BeaconNodeHttpClient {
         Ok(())
     }
 
+    /// `POST beacon/blinded_blocks`
+    ///
+    /// Returns `Ok(None)` on a 404 error.
+    pub async fn post_beacon_blinded_blocks_ssz<T: EthSpec, Payload: AbstractExecPayload<T>>(
+        &self,
+        block: &SignedBeaconBlock<T, Payload>,
+    ) -> Result<(), Error> {
+        let mut path = self.eth_path(V1)?;
+
+        path.path_segments_mut()
+            .map_err(|()| Error::InvalidUrl(self.server.clone()))?
+            .push("beacon")
+            .push("blinded_blocks");
+
+        self.post_generic_with_ssz_body(path, block.as_ssz_bytes(), Some(self.timeouts.proposal))
+            .await?;
+
+        Ok(())
+    }
+
     pub fn post_beacon_blocks_v2_path(
         &self,
         validation_level: Option<BroadcastValidation>,
@@ -829,6 +849,23 @@ impl BeaconNodeHttpClient {
         Ok(())
     }
 
+    /// `POST v2/beacon/blinded_blocks`
+    pub async fn post_beacon_blinded_blocks_v2_ssz<T: EthSpec>(
+        &self,
+        block: &SignedBlindedBeaconBlock<T>,
+        validation_level: Option<BroadcastValidation>,
+    ) -> Result<(), Error> {
+        self.post_generic_with_consensus_version_and_ssz_body(
+            self.post_beacon_blinded_blocks_v2_path(validation_level)?,
+            block.as_ssz_bytes(),
+            Some(self.timeouts.proposal),
+            block.message().body().fork_name(),
+        )
+        .await?;
+
+        Ok(())
+    }
+
     /// Path for `v2/beacon/blocks`
     pub fn get_beacon_blocks_path(&self, block_id: BlockId) -> Result<Url, Error> {
         let mut path = self.eth_path(V2)?;