gate sync manager and sync overseer from asking blobs if given fork is post fulu fork epoch (#7039)

Author: agnxsh

beacon_chain/nimbus_beacon_node.nim

@@ -500,6 +500,7 @@ proc initFullNode(
     syncManager = newSyncManager[Peer, PeerId](
       node.network.peerPool,
       dag.cfg.DENEB_FORK_EPOCH,
+      dag.cfg.FULU_FORK_EPOCH,
       dag.cfg.MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS,
       dag.cfg.MAX_BLOBS_PER_BLOCK_ELECTRA,
       SyncQueueKind.Forward, getLocalHeadSlot,
@@ -511,6 +512,7 @@ proc initFullNode(
     backfiller = newSyncManager[Peer, PeerId](
       node.network.peerPool,
       dag.cfg.DENEB_FORK_EPOCH,
+      dag.cfg.FULU_FORK_EPOCH,
       dag.cfg.MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS,
       dag.cfg.MAX_BLOBS_PER_BLOCK_ELECTRA,
       SyncQueueKind.Backward, getLocalHeadSlot,
@@ -527,6 +529,7 @@ proc initFullNode(
     untrustedManager = newSyncManager[Peer, PeerId](
       node.network.peerPool,
       dag.cfg.DENEB_FORK_EPOCH,
+      dag.cfg.FULU_FORK_EPOCH,
       dag.cfg.MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS,
       dag.cfg.MAX_BLOBS_PER_BLOCK_ELECTRA,
       SyncQueueKind.Backward, getLocalHeadSlot,

beacon_chain/sync/sync_manager.nim

@@ -56,6 +56,7 @@ type
   SyncManager*[A, B] = ref object
     pool: PeerPool[A, B]
     DENEB_FORK_EPOCH: Epoch
+    FULU_FORK_EPOCH: Epoch
     MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS: uint64
     MAX_BLOBS_PER_BLOCK_ELECTRA: uint64
     responseTimeout: chronos.Duration
@@ -142,6 +143,7 @@ proc initQueue[A, B](man: SyncManager[A, B]) =
 proc newSyncManager*[A, B](
     pool: PeerPool[A, B],
     denebEpoch: Epoch,
+    fuluEpoch: Epoch,
     minEpochsForBlobSidecarsRequests: uint64,
     maxBlobsPerBlockElectra: uint64,
     direction: SyncQueueKind,
@@ -171,6 +173,7 @@ proc newSyncManager*[A, B](
   var res = SyncManager[A, B](
     pool: pool,
     DENEB_FORK_EPOCH: denebEpoch,
+    FULU_FORK_EPOCH: fuluEpoch,
     MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS: minEpochsForBlobSidecarsRequests,
     MAX_BLOBS_PER_BLOCK_ELECTRA: maxBlobsPerBlockElectra,
     getLocalHeadSlot: getLocalHeadSlotCb,
@@ -212,7 +215,7 @@ proc shouldGetBlobs[A, B](man: SyncManager[A, B], s: Slot): bool =
   let
     wallEpoch = man.getLocalWallSlot().epoch
     epoch = s.epoch()
-  (epoch >= man.DENEB_FORK_EPOCH) and
+  (epoch >= man.DENEB_FORK_EPOCH) and (epoch < man.FULU_FORK_EPOCH) and
   (wallEpoch < man.MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS or
    epoch >=  wallEpoch - man.MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS)