add electra gossip transition

beacon_chain/light_client.nim

@@ -382,7 +382,8 @@ proc updateGossipStatus*(
 
     currentEpochTargetGossipState = getTargetGossipState(
       epoch, cfg.ALTAIR_FORK_EPOCH, cfg.BELLATRIX_FORK_EPOCH,
-      cfg.CAPELLA_FORK_EPOCH, cfg.DENEB_FORK_EPOCH, isBehind)
+      cfg.CAPELLA_FORK_EPOCH, cfg.DENEB_FORK_EPOCH, cfg.ELECTRA_FORK_EPOCH,
+      isBehind)
     targetGossipState =
       if lcBehind or epoch < 1:
         currentEpochTargetGossipState
@@ -392,7 +393,8 @@ proc updateGossipStatus*(
         # Therefore, LC topic subscriptions are kept for 1 extra epoch.
         let previousEpochTargetGossipState = getTargetGossipState(
           epoch - 1, cfg.ALTAIR_FORK_EPOCH, cfg.BELLATRIX_FORK_EPOCH,
-          cfg.CAPELLA_FORK_EPOCH, cfg.DENEB_FORK_EPOCH, isBehind)
+          cfg.CAPELLA_FORK_EPOCH, cfg.DENEB_FORK_EPOCH, cfg.ELECTRA_FORK_EPOCH,
+          isBehind)
         currentEpochTargetGossipState + previousEpochTargetGossipState
 
   template currentGossipState(): auto = lightClient.gossipState

beacon_chain/nimbus_beacon_node.nim

@@ -810,6 +810,9 @@ proc init*(T: type BeaconNode,
   func getDenebForkEpoch(): Opt[Epoch] =
     Opt.some(cfg.DENEB_FORK_EPOCH)
 
+  func getElectraForkEpoch(): Opt[Epoch] =
+    Opt.some(cfg.ELECTRA_FORK_EPOCH)
+
   proc getForkForEpoch(epoch: Epoch): Opt[Fork] =
     Opt.some(dag.forkAtEpoch(epoch))
 
@@ -979,7 +982,8 @@ proc updateBlocksGossipStatus*(
 
     targetGossipState = getTargetGossipState(
       slot.epoch, cfg.ALTAIR_FORK_EPOCH, cfg.BELLATRIX_FORK_EPOCH,
-      cfg.CAPELLA_FORK_EPOCH, cfg.DENEB_FORK_EPOCH, isBehind)
+      cfg.CAPELLA_FORK_EPOCH, cfg.DENEB_FORK_EPOCH, cfg.ELECTRA_FORK_EPOCH,
+      isBehind)
 
   template currentGossipState(): auto = node.blocksGossipState
   if currentGossipState == targetGossipState:
@@ -1285,6 +1289,8 @@ proc updateGossipStatus(node: BeaconNode, slot: Slot) {.async.} =
     TOPIC_SUBSCRIBE_THRESHOLD_SLOTS = 64
     HYSTERESIS_BUFFER = 16
 
+  static: doAssert high(ConsensusFork) == ConsensusFork.Electra
+
   let
     head = node.dag.head
     headDistance =
@@ -1299,6 +1305,7 @@ proc updateGossipStatus(node: BeaconNode, slot: Slot) {.async.} =
         node.dag.cfg.BELLATRIX_FORK_EPOCH,
         node.dag.cfg.CAPELLA_FORK_EPOCH,
         node.dag.cfg.DENEB_FORK_EPOCH,
+        node.dag.cfg.ELECTRA_FORK_EPOCH,
         isBehind)
 
   doAssert targetGossipState.card <= 2

beacon_chain/nimbus_light_client.nim

@@ -222,7 +222,8 @@ programMain:
 
       targetGossipState = getTargetGossipState(
         slot.epoch, cfg.ALTAIR_FORK_EPOCH, cfg.BELLATRIX_FORK_EPOCH,
-        cfg.CAPELLA_FORK_EPOCH, cfg.DENEB_FORK_EPOCH, isBehind)
+        cfg.CAPELLA_FORK_EPOCH, cfg.DENEB_FORK_EPOCH, cfg.ELECTRA_FORK_EPOCH,
+        isBehind)
 
     template currentGossipState(): auto = blocksGossipState
     if currentGossipState == targetGossipState:

beacon_chain/spec/network.nim

@@ -155,13 +155,15 @@ func getDiscoveryForkID*(cfg: RuntimeConfig,
 type GossipState* = set[ConsensusFork]
 func getTargetGossipState*(
     epoch, ALTAIR_FORK_EPOCH, BELLATRIX_FORK_EPOCH, CAPELLA_FORK_EPOCH,
-    DENEB_FORK_EPOCH: Epoch, isBehind: bool): GossipState =
+    DENEB_FORK_EPOCH: Epoch, ELECTRA_FORK_EPOCH: Epoch, isBehind: bool):
+    GossipState =
   if isBehind:
     return {}
 
   doAssert BELLATRIX_FORK_EPOCH >= ALTAIR_FORK_EPOCH
   doAssert CAPELLA_FORK_EPOCH >= BELLATRIX_FORK_EPOCH
   doAssert DENEB_FORK_EPOCH >= CAPELLA_FORK_EPOCH
+  doAssert ELECTRA_FORK_EPOCH >= DENEB_FORK_EPOCH
 
   # https://github.com/ethereum/consensus-specs/issues/2902
   # Don't care whether ALTAIR_FORK_EPOCH == BELLATRIX_FORK_EPOCH or
@@ -187,7 +189,9 @@ func getTargetGossipState*(
   maybeIncludeFork(
     ConsensusFork.Capella,   CAPELLA_FORK_EPOCH,   DENEB_FORK_EPOCH)
   maybeIncludeFork(
-    ConsensusFork.Deneb,     DENEB_FORK_EPOCH,     FAR_FUTURE_EPOCH)
+    ConsensusFork.Deneb,     DENEB_FORK_EPOCH,     ELECTRA_FORK_EPOCH)
+  maybeIncludeFork(
+    ConsensusFork.Electra,   ELECTRA_FORK_EPOCH,   FAR_FUTURE_EPOCH)
 
   doAssert len(targetForks) <= 2
   targetForks

tests/test_gossip_transition.nim

@@ -14,7 +14,8 @@ import
   ../beacon_chain/spec/[forks, network]
 
 template getTargetGossipState(a, b, c, d, e: int, isBehind: bool): auto =
-  getTargetGossipState(a.Epoch, b.Epoch, c.Epoch, d.Epoch, e.Epoch, isBehind)
+  getTargetGossipState(
+    a.Epoch, b.Epoch, c.Epoch, d.Epoch, e.Epoch, FAR_FUTURE_EPOCH, isBehind)
 
 suite "Gossip fork transition":
   test "Gossip fork transition":