make message_router.routeSignedBeaconBlock blob-aware (#4537)

* make message_router.outeSignedBeaconBlock blob-aware

* Update beacon_chain/spec/forks.nim

* Update beacon_chain/spec/forks.nim

beacon_chain/networking/eth2_network.nim

@@ -2653,23 +2653,13 @@ proc broadcastBeaconBlock*(
   let topic = getBeaconBlocksTopic(node.forkDigests.capella)
   node.broadcast(topic, blck)
 
+proc broadcastBeaconBlockAndBlobsSidecar*(
+    node: Eth2Node, blck: eip4844.SignedBeaconBlockAndBlobsSidecar): Future[SendResult] =
+  let topic = getBeaconBlockAndBlobsSidecarTopic(node.forkDigests.eip4844)
+  node.broadcast(topic, blck)
+
 from ../spec/datatypes/eip4844 import SignedBeaconBlock
 
-proc broadcastBeaconBlock*(
-    node: Eth2Node, blck: eip4844.SignedBeaconBlock): Future[SendResult] =
-  debugRaiseAssert $eip4844ImplementationMissing & ": eth2_network.nim:broadcastBeaconBlock EIP4844 uses different approach (1)"
-
-proc broadcastBeaconBlock*(
-    node: Eth2Node, forked: ForkedSignedBeaconBlock): Future[SendResult] =
-  withBlck(forked):
-    when stateFork == BeaconStateFork.EIP4844:
-      debugRaiseAssert $eip4844ImplementationMissing & ": eth2_network.nim:broadcastBeaconBlock EIP4844 uses different approach (2)"
-      let f = newFuture[SendResult]()
-      f.fail(new CatchableError)
-      f
-    else:
-      node.broadcastBeaconBlock(blck)
-
 proc broadcastSyncCommitteeMessage*(
     node: Eth2Node, msg: SyncCommitteeMessage,
     subcommitteeIdx: SyncSubcommitteeIndex): Future[SendResult] =

beacon_chain/spec/forks.nim

@@ -9,6 +9,7 @@
 
 import
   stew/assign2,
+  stew/results,
   chronicles,
   ../extras,
   "."/[
@@ -272,6 +273,14 @@ template toSignedBeaconBlock*(b: ForkySignedBeaconBlockMaybeBlobs): ForkySignedB
   else:
     b
 
+func optBlobs*(b: ForkySignedBeaconBlockMaybeBlobs):
+         Opt[eip4844.BlobsSidecar] =
+  when b is phase0.SignedBeaconBlock or b is altair.SignedBeaconBlock or
+     b is bellatrix.SignedBeaconBlock or b is capella.SignedBeaconBlock:
+    Opt.none(eip4844.BlobsSidecar)
+  elif b is eip4844.SignedBeaconBlockAndBlobsSidecar:
+    Opt.some(b.blobs_sidecar)
+    
 template toFork*[T: phase0.BeaconState | phase0.HashedBeaconState](
     t: type T): BeaconStateFork =
   BeaconStateFork.Phase0

beacon_chain/validators/message_router.nim

@@ -107,7 +107,12 @@ proc routeSignedBeaconBlock*(
     # The block passed basic gossip validation - we can "safely" broadcast it
     # now. In fact, per the spec, we should broadcast it even if it later fails
     # to apply to our state.
-    res = await router[].network.broadcastBeaconBlock(blck)
+
+  let res =
+    when blckAndBlobs is eip4844.SignedBeaconBlockAndBlobsSidecar:
+      await router[].network.broadcastBeaconBlockAndBlobsSidecar(blckAndBlobs)
+    else:
+      await router[].network.broadcastBeaconBlock(blck)
 
   if res.isOk():
     beacon_blocks_sent.inc()
@@ -121,9 +126,8 @@ proc routeSignedBeaconBlock*(
       blockRoot = shortLog(blck.root), blck = shortLog(blck.message),
       signature = shortLog(blck.signature), error = res.error()
 
-  let
-    newBlockRef = await router[].blockProcessor.storeBlock(
-      MsgSource.api, sendTime, blck, Opt.none(eip4844.BlobsSidecar))
+  let newBlockRef = await router[].blockProcessor.storeBlock(
+    MsgSource.api, sendTime, blck, optBlobs(blckAndBlobs))
 
   # The boolean we return tells the caller whether the block was integrated
   # into the chain