capella VC support (#4586)

beacon_chain/rpc/rest_beacon_api.nim

@@ -798,6 +798,7 @@ proc installBeaconApiHandlers*(router: var RestRouter, node: BeaconNode) =
 
         if forked.kind != node.dag.cfg.blockForkAtEpoch(
              getForkedBlockField(forked, slot).epoch):
+          doAssert strictVerification notin node.dag.updateFlags
           return RestApiResponse.jsonError(Http400, InvalidBlockObjectError)
 
         withBlck(forked):

beacon_chain/spec/eth2_apis/eth2_rest_serialization.nim

@@ -925,7 +925,9 @@ template prepareForkedBlockReading(
       of "bellatrix":
         version = some(ConsensusFork.Bellatrix)
       of "capella":
-        version = some(ConsensusFork.Bellatrix)
+        version = some(ConsensusFork.Capella)
+      of "eip4844":
+        version = some(ConsensusFork.EIP4844)
       else:
         reader.raiseUnexpectedValue("Incorrect version field value")
     of "block", "block_header", "data":
@@ -1200,7 +1202,8 @@ proc readValue*(reader: var JsonReader[RestJson],
     voluntary_exits: Option[
       List[SignedVoluntaryExit, Limit MAX_VOLUNTARY_EXITS]]
     sync_aggregate: Option[SyncAggregate]
-    execution_payload: Option[bellatrix.ExecutionPayload]
+    execution_payload: Option[RestExecutionPayload]
+    bls_to_execution_changes: Option[SignedBLSToExecutionChangeList]
 
   for fieldName in readObjectFields(reader):
     case fieldName
@@ -1259,7 +1262,12 @@ proc readValue*(reader: var JsonReader[RestJson],
       if execution_payload.isSome():
         reader.raiseUnexpectedField("Multiple `execution_payload` fields found",
                                     "RestPublishedBeaconBlockBody")
-      execution_payload = some(reader.readValue(bellatrix.ExecutionPayload))
+      execution_payload = some(reader.readValue(RestExecutionPayload))
+    of "bls_to_execution_changes":
+      if bls_to_execution_changes.isSome():
+        reader.raiseUnexpectedField("Multiple `bls_to_execution_changes` fields found",
+                                    "RestPublishedBeaconBlockBody")
+      bls_to_execution_changes = some(reader.readValue(SignedBLSToExecutionChangeList))
     else:
       unrecognizedFieldWarning()
 
@@ -1280,15 +1288,36 @@ proc readValue*(reader: var JsonReader[RestJson],
   if voluntary_exits.isNone():
     reader.raiseUnexpectedValue("Field `voluntary_exits` is missing")
 
-  discard $capellaImplementationMissing & ": autodetect via added field"
   let bodyKind =
-    if execution_payload.isSome() and sync_aggregate.isSome():
+    if  execution_payload.isSome() and
+        execution_payload.get().withdrawals.isSome() and
+        bls_to_execution_changes.isSome() and
+        sync_aggregate.isSome():
+      ConsensusFork.Capella
+    elif execution_payload.isSome() and sync_aggregate.isSome():
       ConsensusFork.Bellatrix
     elif execution_payload.isNone() and sync_aggregate.isSome():
       ConsensusFork.Altair
     else:
       ConsensusFork.Phase0
 
+  template ep_src: auto = execution_payload.get()
+  template copy_ep_bellatrix(ep_dst: auto) =
+    assign(ep_dst.parent_hash, ep_src.parent_hash)
+    assign(ep_dst.fee_recipient, ep_src.fee_recipient)
+    assign(ep_dst.state_root, ep_src.state_root)
+    assign(ep_dst.receipts_root, ep_src.receipts_root)
+    assign(ep_dst.logs_bloom, ep_src.logs_bloom)
+    assign(ep_dst.prev_randao, ep_src.prev_randao)
+    assign(ep_dst.block_number, ep_src.block_number)
+    assign(ep_dst.gas_limit, ep_src.gas_limit)
+    assign(ep_dst.gas_used, ep_src.gas_used)
+    assign(ep_dst.timestamp, ep_src.timestamp)
+    assign(ep_dst.extra_Data, ep_src.extra_Data)
+    assign(ep_dst.base_fee_per_Gas, ep_src.base_fee_per_Gas)
+    assign(ep_dst.block_hash, ep_src.block_hash)
+    assign(ep_dst.transactions, ep_src.transactions)
+
   case bodyKind
   of ConsensusFork.Phase0:
     value = RestPublishedBeaconBlockBody(
@@ -1332,11 +1361,29 @@ proc readValue*(reader: var JsonReader[RestJson],
         deposits: deposits.get(),
         voluntary_exits: voluntary_exits.get(),
         sync_aggregate: sync_aggregate.get(),
-        execution_payload: execution_payload.get()
       )
     )
+    copy_ep_bellatrix(value.bellatrixBody.execution_payload)
   of ConsensusFork.Capella:
-    reader.raiseUnexpectedValue($capellaImplementationMissing)
+    value = RestPublishedBeaconBlockBody(
+      kind: ConsensusFork.Capella,
+      capellaBody: capella.BeaconBlockBody(
+        randao_reveal: randao_reveal.get(),
+        eth1_data: eth1_data.get(),
+        graffiti: graffiti.get(),
+        proposer_slashings: proposer_slashings.get(),
+        attester_slashings: attester_slashings.get(),
+        attestations: attestations.get(),
+        deposits: deposits.get(),
+        voluntary_exits: voluntary_exits.get(),
+        sync_aggregate: sync_aggregate.get(),
+        bls_to_execution_changes: bls_to_execution_changes.get()
+      )
+    )
+    copy_ep_bellatrix(value.capellaBody.execution_payload)
+    assign(
+      value.capellaBody.execution_payload.withdrawals,
+      ep_src.withdrawals.get())
   of ConsensusFork.EIP4844:
     reader.raiseUnexpectedValue($eip4844ImplementationMissing)
 
@@ -1524,6 +1571,8 @@ proc readValue*(reader: var JsonReader[RestJson],
         version = some(ConsensusFork.Bellatrix)
       of "capella":
         version = some(ConsensusFork.Capella)
+      of "eip4844":
+        version = some(ConsensusFork.EIP4844)
       else:
         reader.raiseUnexpectedValue("Incorrect version field value")
     of "data":

beacon_chain/spec/eth2_apis/rest_types.nim

@@ -277,6 +277,26 @@ type
     index*: ValidatorIndex
     is_live*: bool
 
+  # https://github.com/ethereum/consensus-specs/blob/v1.3.0-rc.2/specs/capella/beacon-chain.md#executionpayload
+  RestExecutionPayload* = object
+    parent_hash*: Eth2Digest
+    fee_recipient*: ExecutionAddress  # 'beneficiary' in the yellow paper
+    state_root*: Eth2Digest
+    receipts_root*: Eth2Digest # 'receipts root' in the yellow paper
+    logs_bloom*: BloomLogs
+    prev_randao*: Eth2Digest  # 'difficulty' in the yellow paper
+    block_number*: uint64  # 'number' in the yellow paper
+    gas_limit*: uint64
+    gas_used*: uint64
+    timestamp*: uint64
+    extra_data*: List[byte, MAX_EXTRA_DATA_BYTES]
+    base_fee_per_gas*: UInt256
+
+    # Extra payload fields
+    block_hash*: Eth2Digest # Hash of execution block
+    transactions*: List[Transaction, MAX_TRANSACTIONS_PER_PAYLOAD]
+    withdrawals*: Option[List[Withdrawal, MAX_WITHDRAWALS_PER_PAYLOAD]]  # [New in Capella]
+
   PrepareBeaconProposer* = object
     validator_index*: ValidatorIndex
     fee_recipient*: Eth1Address
@@ -636,7 +656,6 @@ type
   GetVersionResponse* = DataEnclosedObject[RestNodeVersion]
   GetEpochSyncCommitteesResponse* = DataEnclosedObject[RestEpochSyncCommittee]
   ProduceAttestationDataResponse* = DataEnclosedObject[AttestationData]
-  ProduceBlockResponse* = DataEnclosedObject[phase0.BeaconBlock]
   ProduceBlockResponseV2* = ForkedBeaconBlock
   ProduceBlindedBlockResponse* = ForkedBlindedBeaconBlock
   ProduceSyncCommitteeContributionResponse* = DataEnclosedObject[SyncCommitteeContribution]

config.nims

@@ -183,8 +183,7 @@ switch("warning", "ObservableStores:off")
 switch("warning", "LockLevel:off")
 
 # Too many of these because of Defect compat in 1.2
-if (NimMajor, NimMinor) >= (1, 6):
-  switch("hint", "XCannotRaiseY:off")
+switch("hint", "XCannotRaiseY:off")
 
 # Useful for Chronos metrics.
 #--define:chronosFutureTracking

scripts/launch_local_testnet.sh

@@ -785,6 +785,7 @@ DEPOSIT_CONTRACT_ADDRESS: ${DEPOSIT_CONTRACT_ADDRESS}
 ETH1_FOLLOW_DISTANCE: 1
 ALTAIR_FORK_EPOCH: 1
 BELLATRIX_FORK_EPOCH: 2
+CAPELLA_FORK_EPOCH: 3
 TERMINAL_TOTAL_DIFFICULTY: 0
 EOF