add filtering to peer pool and protocol, remove filtering from SyncManager level

beacon_chain/networking/eth2_network.nim

@@ -1668,7 +1668,7 @@ proc resolvePeer(peer: Peer) =
 proc handlePeer*(peer: Peer) {.async: (raises: [CancelledError]).} =
   let res = peer.network.peerPool.addPeerNoWait(peer, peer.direction)
   case res:
-  of PeerStatus.LowScoreError, PeerStatus.NoSpaceError:
+  of PeerStatus.LowScoreError, PeerStatus.LowCscError, PeerStatus.NoSpaceError:
     # Peer has low score or we do not have enough space in PeerPool,
     # we are going to disconnect it gracefully.
     # Peer' state will be updated in connection event.
@@ -1821,7 +1821,8 @@ proc new(T: type Eth2Node,
       config, ip, tcpPort, udpPort, privKey,
       {
         enrForkIdField: SSZ.encode(enrForkId),
-        enrAttestationSubnetsField: SSZ.encode(metadata.attnets)
+        enrAttestationSubnetsField: SSZ.encode(metadata.attnets),
+        enrCustodySubnetCountField: SSZ.encode(metadata.custody_subnet_count)
       },
     rng),
     discoveryEnabled: discovery,
@@ -1841,6 +1842,31 @@ proc new(T: type Eth2Node,
   proc scoreCheck(peer: Peer): bool =
     peer.score >= PeerScoreLowLimit
 
+  proc fetchCustodyColumnCountFromRemotePeer(peer: Peer):
+                                              uint64 =
+    # Fetches the custody column count from a remote peer
+    # if the peer advertises their custody column count 
+    # via the `csc` ENR field. If the peer does NOT, then
+    # the default value is assume, i.e, CUSTODY_REQUIREMENT
+
+    let enrOpt = peer.enr
+    if enrOpt.isNone:
+      debug "Could not get ENR from peer",
+        peer_id = peer.peerId
+      return 0
+
+    else:
+      let
+        enr = enrOpt.get
+        enrFieldOpt = 
+            enr.get(enrCustodySubnetCountField, uint64)
+
+      if not enrFieldOpt.isOk:
+        debug "Issue with fetching `csc` field from ENR",
+          enr = enr
+      else:
+        return(enrFieldOpt.get)
+
   proc onDeletePeer(peer: Peer) =
     peer.releasePeer()
 

beacon_chain/networking/peer_pool.nim

@@ -9,6 +9,8 @@
 
 import std/[tables, heapqueue]
 import chronos
+import
+  ../spec/datatypes/[eip7594]
 
 export tables
 
@@ -27,7 +29,8 @@ type
     DuplicateError, ## Peer is already present in PeerPool.
     NoSpaceError,   ## There no space for the peer in PeerPool.
     LowScoreError,  ## Peer has too low score.
-    DeadPeerError   ## Peer is already dead.
+    DeadPeerError,  ## Peer is already dead.
+    LowCscError,    ## Peer's custody subnet count is lower than minimum requirment.
 
   PeerItem[T] = object
     data: T
@@ -283,6 +286,14 @@ proc checkPeerScore*[A, B](pool: PeerPool[A, B], peer: A): bool {.inline.} =
   else:
     true
 
+proc checkCscCount*[A, B](pool: PeerPool[A, B], peer: A): bool {.inline.} =
+  ## Returns ``true`` if peer had MINIMUM_CUSTODY_REQUIREMENT
+  let csc = pool.fetchCustodyColumnCountFromRemotePeer(peer)
+  if csc >= CUSTODY_REQUIREMENT:
+    true
+  else:
+    false 
+
 proc peerCountChanged[A, B](pool: PeerPool[A, B]) =
   ## Call callback when number of peers changed.
   if not(isNil(pool.peerCounter)):
@@ -380,6 +391,7 @@ proc checkPeer*[A, B](pool: PeerPool[A, B], peer: A): PeerStatus {.inline.} =
   ## * Positive value of peer's score - (PeerStatus.LowScoreError)
   ## * Peer's key is not present in PeerPool - (PeerStatus.DuplicateError)
   ## * Peer's lifetime future is not finished yet - (PeerStatus.DeadPeerError)
+  ## * Low value of peer's custody subnet count - (PeerStatus.LowCscError)
   ##
   ## If peer could be added to PeerPool procedure returns (PeerStatus.Success)
   mixin getKey, getFuture

beacon_chain/networking/peer_protocol.nim

@@ -10,6 +10,7 @@
 import
   chronicles,
   ../spec/network,
+  ../spec/datatypes/[eip7594],
   ".."/[beacon_clock],
   ../networking/eth2_network,
   ../consensus_object_pools/blockchain_dag,
@@ -150,6 +151,16 @@ p2pProtocol PeerSync(version = 1,
       ourStatus = peer.networkState.getCurrentStatus()
       theirStatus = await peer.status(ourStatus, timeout = RESP_TIMEOUT_DUR)
     
+    if incoming == true:
+      let
+        metadataRes = await peer.getMetadata_v3()
+        metadata = metadataRes.get
+      if metadata.custody_subnet_count < CUSTODY_REQUIREMENT:
+        debug "Custody requirement is lesser than min, peer disconnected",
+              peer, errorKind = theirStatus.error.kind
+        await peer.disconnect(FaultOrError)
+      else: discard
+
     if theirStatus.isOk:
       discard await peer.handleStatus(peer.networkState, theirStatus.get())
     else:

beacon_chain/sync/request_manager.nim

@@ -268,6 +268,31 @@ proc fetchBlobsFromNetwork(self: RequestManager,
     if not(isNil(peer)):
       self.network.peerPool.release(peer)
 
+proc lookupCscFromPeer(peer: Peer):
+                                            uint64 =
+  # Fetches the custody column count from a remote peer
+  # if the peer advertises their custody column count 
+  # via the `csc` ENR field. If the peer does NOT, then
+  # the default value is assume, i.e, CUSTODY_REQUIREMENT
+
+  let enrOpt = peer.enr
+  if enrOpt.isNone:
+    debug "Could not get ENR from peer",
+      peer_id = peer.peerId
+    return 0
+
+  else:
+    let
+      enr = enrOpt.get
+      enrFieldOpt = 
+          enr.get(enrCustodySubnetCountField, uint64)
+
+    if not enrFieldOpt.isOk:
+      debug "Issue with fetching `csc` field from ENR",
+        enr = enr
+    else:
+      return(enrFieldOpt.get)
+
 proc constructValidCustodyPeers(rman: RequestManager,
                                 peers: openArray[Peer]):
                                 seq[Peer] =
@@ -288,7 +313,7 @@ proc constructValidCustodyPeers(rman: RequestManager,
   for peer in peers:
     # Get the custody subnet count of the remote peer
     let remoteCustodySubnetCount =
-      peer.fetchCustodyColumnCountFromRemotePeer()
+      peer.lookupCscFromPeer()
     
     # Extract remote peer's nodeID from peerID
     # Fetch custody columns from remote peer

beacon_chain/sync/sync_manager.nim

@@ -326,81 +326,6 @@ func checkDataColumns(data_columns: seq[DataColumnSidecars]): Result[void, strin
       ? data_column_sidecar[].verify_data_column_sidecar_inclusion_proof()
   ok()
 
-proc fetchCustodyColumnCountFromRemotePeer*(peer: Peer):
-                                            uint64 =
-  # Fetches the custody column count from a remote peer
-  # if the peer advertises their custody column count 
-  # via the `csc` ENR field. If the peer does NOT, then
-  # the default value is assume, i.e, CUSTODY_REQUIREMENT
-
-  let enrOpt = peer.enr
-  if enrOpt.isNone:
-    debug "Could not get ENR from peer",
-      peer_id = peer.peerId
-    return 0
-
-  else:
-    let
-      enr = enrOpt.get
-      enrFieldOpt = 
-          enr.get(enrCustodySubnetCountField, uint64)
-
-    if not enrFieldOpt.isOk:
-      debug "Issue with fetching `csc` field from ENR",
-        enr = enr
-    else:
-      return(enrFieldOpt.get)
-
-proc checkValidPeerCustody*[A, B](man: SyncManager[A, B], peer: A): bool =
-  # `constructValidaCustodyPeers` returns a list of peers that are an overall
-  # superset of the given local node's custody columns and the custody columns
-  # of the remote peers
-
-  # Get the local custody subnet count
-
-  let localCustodySubnetCount =
-    if man.supernode:
-      DATA_COLUMN_SIDECAR_SUBNET_COUNT.uint64
-    else:
-      CUSTODY_REQUIREMENT
-
-  # Get the local custody columns
-  let 
-    localNodeId = peer.getNodeIdFromPeer()
-    localCustodyColumns = 
-        localNodeId.get_custody_columns(localCustodySubnetCount).get
-
-  var validPeerIds: seq[PeerId]
-
-  # Get the custody subnet counts of the remote peer
-  let remoteCustodySubnetCount = 
-      peer.fetchCustodyColumnCountFromRemotePeer()
-
-  # Extract remote peer's nodeID from peerID
-  # Fetch custody columns fromm remote peer
-  let 
-    remoteNodeId = peer.getNodeIdFromPeer()
-    remoteCustodyColumns = 
-        remoteNodeId.get_custody_columns(remoteCustodySubnetCount).get
-
-  # If the remote peer custodies less columns than our local node
-  # We skip it
-  if remoteCustodyColumns.len < localCustodyColumns.len:
-    return false
-
-  # If the remote peer custodies all the possible columns
-  if remoteCustodyColumns.len == NUMBER_OF_COLUMNS:
-    return true
-
-  # Filtering out the invalid peers
-  for column in localCustodyColumns:
-    if column notin remoteCustodyColumns:
-      return true
-  
-  # Otherwise add the peer to the set
-  # of valid peerIds
-  true
-
 proc syncStep[A, B](man: SyncManager[A, B], index: int, peer: A)
     {.async: (raises: [CancelledError]).} =
   logScope:
@@ -632,7 +557,6 @@ proc syncStep[A, B](man: SyncManager[A, B], index: int, peer: A)
   
   let dataColumnData =
     if shouldGetDataColumns:
-      if man.checkValidPeerCustody(peer):
       let data_columns = await man.getDataColumnSidecars(peer, req)
       if data_columns.isErr():
         # peer.updateScore(PeerScoreNoValues)
@@ -672,8 +596,7 @@ proc syncStep[A, B](man: SyncManager[A, B], index: int, peer: A)
           msg = checkRes.error
         return
       Opt.some(groupedDataColumns.get())
-      else:
+
-        Opt.none(seq[DataColumnSidecars])
     else:
       Opt.none(seq[DataColumnSidecars])