initial VC Electra publishBlock support (#6189)

beacon_chain/spec/eth2_apis/eth2_rest_serialization.nim

@@ -345,6 +345,7 @@ type
     capella.SignedBeaconBlock |
     phase0.SignedBeaconBlock |
     DenebSignedBlockContents |
+    ElectraSignedBlockContents |
     ForkedMaybeBlindedBeaconBlock
 
   EncodeArrays* =
@@ -403,8 +404,8 @@ type
 
   RestBlockTypes* = phase0.BeaconBlock | altair.BeaconBlock |
                     bellatrix.BeaconBlock | capella.BeaconBlock |
-                    deneb.BlockContents | capella_mev.BlindedBeaconBlock |
-                    deneb_mev.BlindedBeaconBlock
+                    deneb.BlockContents | deneb_mev.BlindedBeaconBlock |
+                    electra.BlockContents | electra_mev.BlindedBeaconBlock
 
 func readStrictHexChar(c: char, radix: static[uint8]): Result[int8, cstring] =
   ## Converts an hex char to an int
@@ -3970,14 +3971,8 @@ proc decodeBytes*[T: DecodeConsensysTypes](
           forked = ForkedBlindedBeaconBlock(
             kind: ConsensusFork.Deneb, denebData: blck)
         ok(ProduceBlindedBlockResponse(forked))
-      of ConsensusFork.Capella:
-        let
-          blck = ? readSszResBytes(capella_mev.BlindedBeaconBlock, value)
-          forked = ForkedBlindedBeaconBlock(
-            kind: ConsensusFork.Capella, capellaData: blck)
-        ok(ProduceBlindedBlockResponse(forked))
-      of ConsensusFork.Bellatrix, ConsensusFork.Altair, ConsensusFork.Phase0:
-        err("Unable to decode blinded block for Bellatrix, Altair, and Phase0 forks")
+      of ConsensusFork.Phase0 .. ConsensusFork.Capella:
+        err("Unable to decode blinded block for pre-Deneb forks")
   else:
     err("Unsupported Content-Type")
 
@@ -4036,10 +4031,7 @@ proc decodeBytes*[T: ProduceBlockResponseV3](
           except ValueError:
             return err("Incorrect `Eth-Consensus-Block-Value` header value")
     withConsensusFork(fork):
-      when consensusFork >= ConsensusFork.Electra:
-        debugRaiseAssert "eth2 rest serialization"
-        return err("electra missing")
-      elif consensusFork >= ConsensusFork.Deneb:
+      when consensusFork >= ConsensusFork.Deneb:
         if blinded:
           let contents =
             ? readSszResBytes(consensusFork.BlindedBlockContents, value)

beacon_chain/spec/eth2_apis/rest_beacon_calls.nim

@@ -148,6 +148,11 @@ proc publishBlock*(body: DenebSignedBlockContents): RestPlainResponse {.
      meth: MethodPost.}
   ## https://ethereum.github.io/beacon-APIs/#/Beacon/publishBlock
 
+proc publishBlock*(body: ElectraSignedBlockContents): RestPlainResponse {.
+     rest, endpoint: "/eth/v1/beacon/blocks",
+     meth: MethodPost.}
+  ## https://ethereum.github.io/beacon-APIs/#/Beacon/publishBlock
+
 proc publishSszBlock*(
        client: RestClientRef,
        blck: ForkySignedBeaconBlock

beacon_chain/spec/forks.nim

@@ -585,7 +585,9 @@ template BlockContents*(
 
 template BlindedBlockContents*(
     kind: static ConsensusFork): auto =
-  when kind == ConsensusFork.Deneb:
+  when kind == ConsensusFork.Electra:
+    typedesc[electra_mev.BlindedBeaconBlock]
+  elif kind == ConsensusFork.Deneb:
     typedesc[deneb_mev.BlindedBeaconBlock]
   else:
     {.error: "BlindedBlockContents does not support " & $kind.}
@@ -1496,3 +1498,25 @@ template init*(T: type ForkedMaybeBlindedBeaconBlock,
       blindedData: blck),
     consensusValue: cvalue,
     executionValue: evalue)
+
+template init*(T: type ForkedMaybeBlindedBeaconBlock,
+               blck: electra.BlockContents,
+               evalue: Opt[UInt256], cvalue: Opt[UInt256]): T =
+  ForkedMaybeBlindedBeaconBlock(
+    kind: ConsensusFork.Electra,
+    electraData: electra_mev.MaybeBlindedBeaconBlock(
+      isBlinded: false,
+      data: blck),
+    consensusValue: cvalue,
+    executionValue: evalue)
+
+template init*(T: type ForkedMaybeBlindedBeaconBlock,
+               blck: electra_mev.BlindedBeaconBlock,
+               evalue: Opt[UInt256], cvalue: Opt[UInt256]): T =
+  ForkedMaybeBlindedBeaconBlock(
+    kind: ConsensusFork.Electra,
+    electraData: electra_mev.MaybeBlindedBeaconBlock(
+      isBlinded: true,
+      blindedData: blck),
+    consensusValue: cvalue,
+    executionValue: evalue)

beacon_chain/validator_client/api.nim

@@ -2260,8 +2260,7 @@ proc publishBlock*(
         of ConsensusFork.Deneb:
           publishBlock(it, data.denebData)
         of ConsensusFork.Electra:
-          debugRaiseAssert "electra missing"
-          publishBlock(it, data.denebData)
+          publishBlock(it, data.electraData)
       do:
         if apiResponse.isErr():
           handleCommunicationError()