implement getBlindedBlock REST API (#5829)

2024-01-31 03:18:55 +00:00 · 2024-01-31 03:18:55 +00:00 · 87052eba4e
parent 45b4b46041
commit 87052eba4e
10 changed files with 546 additions and 5 deletions
--- a/AllTests-mainnet.md
+++ b/AllTests-mainnet.md
@ -74,6 +74,13 @@ OK: 7/7 Fail: 0/7 Skip: 0/7
 + basics                                                                                     OK
 ```
 OK: 2/2 Fail: 0/2 Skip: 0/2
+## Blinded block conversions
+```diff
+ Bellatrix toSignedBlindedBlock                                                             OK
+ Capella toSignedBlindedBlock                                                               OK
+ Deneb toSignedBlindedBlock                                                                 OK
+```
+OK: 3/3 Fail: 0/3 Skip: 0/3
 ## Block pool altair processing [Preset: mainnet]
 ```diff
 + Invalid signatures [Preset: mainnet]                                                       OK
@ -979,4 +986,4 @@ OK: 2/2 Fail: 0/2 Skip: 0/2
 OK: 9/9 Fail: 0/9 Skip: 0/9

 ---TOTAL---
-OK: 664/669 Fail: 0/669 Skip: 5/669
+OK: 667/672 Fail: 0/672 Skip: 5/672
--- a/beacon_chain/rpc/rest_beacon_api.nim
+++ b/beacon_chain/rpc/rest_beacon_api.nim
@ -14,7 +14,7 @@ import
  ../beacon_node,
  ../consensus_object_pools/[blockchain_dag, spec_cache, validator_change_pool],
  ../spec/[deposit_snapshots, eth2_merkleization, forks, network, validator],
-  ../spec/datatypes/[phase0, altair, deneb],
+  ../spec/mev/bellatrix_mev,
  ../validators/message_router_mev

 export rest_utils
@ -1012,6 +1012,48 @@ proc installBeaconApiHandlers*(router: var RestRouter, node: BeaconNode) =

    RestApiResponse.jsonMsgResponse(BlockValidationSuccess)

+  # https://ethereum.github.io/beacon-APIs/?urls.primaryName=v2.4.2#/Beacon/getBlindedBlock
+  # https://github.com/ethereum/beacon-APIs/blob/v2.4.2/apis/beacon/blocks/blinded_block.yaml
+  router.api2(MethodGet, "/eth/v1/beacon/blinded_blocks/{block_id}") do (
+    block_id: BlockIdent) -> RestApiResponse:
+    let
+      blockIdent = block_id.valueOr:
+        return RestApiResponse.jsonError(Http400, InvalidBlockIdValueError,
+                                         $error)
+      bid = node.getBlockId(blockIdent).valueOr:
+        return RestApiResponse.jsonError(Http404, BlockNotFoundError)
+      contentType =
+        block:
+          let res = preferredContentType(jsonMediaType,
+                                         sszMediaType)
+          if res.isErr():
+            return RestApiResponse.jsonError(Http406, ContentNotAcceptableError)
+          res.get()
+      bdata = node.dag.getForkedBlock(bid).valueOr:
+        return RestApiResponse.jsonError(Http404, BlockNotFoundError)
+
+    template respondSszOrJson(
+        signedMaybeBlindedBlck: auto, consensusFork: ConsensusFork): untyped =
+      if contentType == sszMediaType:
+        RestApiResponse.sszResponse(
+          signedMaybeBlindedBlck,
+          [("eth-consensus-version", consensusFork.toString())])
+      elif contentType == jsonMediaType:
+        RestApiResponse.jsonResponseBlock(
+          signedMaybeBlindedBlck,
+          consensusFork,
+          node.getBlockOptimistic(bdata),
+          node.dag.isFinalized(bid)
+        )
+      else:
+        RestApiResponse.jsonError(Http500, InvalidAcceptError)
+
+    withBlck(bdata.asSigned()):
+      when consensusFork <= ConsensusFork.Altair:
+        respondSszOrJson(forkyBlck, consensusFork)
+      else:
+        respondSszOrJson(toSignedBlindedBeaconBlock(forkyBlck), consensusFork)
+
  # https://ethereum.github.io/beacon-APIs/#/Beacon/publishBlindedBlock
  # https://github.com/ethereum/beacon-APIs/blob/v2.4.0/apis/beacon/blocks/blinded_blocks.yaml
  router.api(MethodPost, "/eth/v1/beacon/blinded_blocks") do (
--- a/beacon_chain/spec/eth2_apis/eth2_rest_serialization.nim
+++ b/beacon_chain/spec/eth2_apis/eth2_rest_serialization.nim
@ -204,6 +204,7 @@ RestJson.useDefaultSerializationFor(
  bellatrix.ExecutionPayload,
  bellatrix.ExecutionPayloadHeader,
  bellatrix.SignedBeaconBlock,
+  bellatrix_mev.BlindedBeaconBlockBody,
  bellatrix_mev.BlindedBeaconBlock,
  bellatrix_mev.SignedBlindedBeaconBlock,
  capella.BeaconBlock,
@ -561,6 +562,33 @@ proc jsonResponse*(t: typedesc[RestApiResponse], data: auto): RestApiResponse =
        default
  RestApiResponse.response(res, Http200, "application/json")

+proc jsonResponseBlock*(t: typedesc[RestApiResponse],
+                        data: ForkySignedBlindedBeaconBlock,
+                        consensusFork: ConsensusFork,
+                        execOpt: Opt[bool],
+                        finalized: bool): RestApiResponse =
+  let
+    headers = [("eth-consensus-version", consensusFork.toString())]
+    res =
+      block:
+        var default: seq[byte]
+        try:
+          var stream = memoryOutput()
+          var writer = JsonWriter[RestJson].init(stream)
+          writer.beginRecord()
+          writer.writeField("version", consensusFork.toString())
+          if execOpt.isSome():
+            writer.writeField("execution_optimistic", execOpt.get())
+          writer.writeField("finalized", finalized)
+          writer.writeField("data", data)
+          writer.endRecord()
+          stream.getOutput(seq[byte])
+        except SerializationError:
+          default
+        except IOError:
+          default
+  RestApiResponse.response(res, Http200, "application/json", headers = headers)
+
 proc jsonResponseBlock*(t: typedesc[RestApiResponse],
                        data: ForkedSignedBeaconBlock,
                        execOpt: Opt[bool],
--- a/beacon_chain/spec/forks.nim
+++ b/beacon_chain/spec/forks.nim
@ -202,7 +202,9 @@ type
  ForkySignedBlindedBeaconBlock* =
    phase0.SignedBeaconBlock |
    altair.SignedBeaconBlock |
-    capella_mev.SignedBlindedBeaconBlock
+    bellatrix_mev.SignedBlindedBeaconBlock |
+    capella_mev.SignedBlindedBeaconBlock |
+    deneb_mev.SignedBlindedBeaconBlock

  ForkedSignedBlindedBeaconBlock* = object
    case kind*: ConsensusFork
@ -318,7 +320,8 @@ template kind*(
      bellatrix.TrustedBeaconBlockBody |
      bellatrix.SigVerifiedSignedBeaconBlock |
      bellatrix.MsgTrustedSignedBeaconBlock |
-      bellatrix.TrustedSignedBeaconBlock]): ConsensusFork =
+      bellatrix.TrustedSignedBeaconBlock] |
+      bellatrix_mev.SignedBlindedBeaconBlock): ConsensusFork =
  ConsensusFork.Bellatrix

 template kind*(
--- a/beacon_chain/spec/mev/bellatrix_mev.nim
+++ b/beacon_chain/spec/mev/bellatrix_mev.nim
@ -7,11 +7,36 @@

 {.push raises: [].}

-from ../datatypes/base import Eth1Data
+import ".."/datatypes/altair
+from ".."/datatypes/bellatrix import ExecutionPayloadHeader
+from ".."/eth2_merkleization import hash_tree_root

 type
+  # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/builder.md#blindedbeaconblockbody
+  BlindedBeaconBlockBody* = object
+    randao_reveal*: ValidatorSig
+    eth1_data*: Eth1Data
+    graffiti*: GraffitiBytes
+    proposer_slashings*: List[ProposerSlashing, Limit MAX_PROPOSER_SLASHINGS]
+    attester_slashings*: List[AttesterSlashing, Limit MAX_ATTESTER_SLASHINGS]
+    attestations*: List[Attestation, Limit MAX_ATTESTATIONS]
+    deposits*: List[Deposit, Limit MAX_DEPOSITS]
+    voluntary_exits*: List[SignedVoluntaryExit, Limit MAX_VOLUNTARY_EXITS]
+    sync_aggregate*: SyncAggregate
+    execution_payload_header*: bellatrix.ExecutionPayloadHeader
+
+  # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/builder.md#blindedbeaconblock
  BlindedBeaconBlock* = object
+    slot*: Slot
+    proposer_index*: uint64
+    parent_root*: Eth2Digest
+    state_root*: Eth2Digest
+    body*: BlindedBeaconBlockBody
+
+  # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/builder.md#signedblindedbeaconblock
  SignedBlindedBeaconBlock* = object
+    message*: BlindedBeaconBlock
+    signature*: ValidatorSig

 func shortLog*(v: BlindedBeaconBlock): auto =
  (
@ -40,3 +65,40 @@ func shortLog*(v: SignedBlindedBeaconBlock): auto =
    blck: shortLog(default(BlindedBeaconBlock)),
    signature: ""
  )
+
+func toSignedBlindedBeaconBlock*(blck: bellatrix.SignedBeaconBlock):
+    SignedBlindedBeaconBlock =
+  SignedBlindedBeaconBlock(
+    message: BlindedBeaconBlock(
+      slot: blck.message.slot,
+      proposer_index: blck.message.proposer_index,
+      parent_root: blck.message.parent_root,
+      state_root: blck.message.state_root,
+      body: BlindedBeaconBlockBody(
+        randao_reveal: blck.message.body.randao_reveal,
+        eth1_data: blck.message.body.eth1_data,
+        graffiti: blck.message.body.graffiti,
+        proposer_slashings: blck.message.body.proposer_slashings,
+        attester_slashings: blck.message.body.attester_slashings,
+        attestations: blck.message.body.attestations,
+        deposits: blck.message.body.deposits,
+        voluntary_exits: blck.message.body.voluntary_exits,
+        sync_aggregate: blck.message.body.sync_aggregate,
+        execution_payload_header: ExecutionPayloadHeader(
+          parent_hash: blck.message.body.execution_payload.parent_hash,
+          fee_recipient: blck.message.body.execution_payload.fee_recipient,
+          state_root: blck.message.body.execution_payload.state_root,
+          receipts_root: blck.message.body.execution_payload.receipts_root,
+          logs_bloom: blck.message.body.execution_payload.logs_bloom,
+          prev_randao: blck.message.body.execution_payload.prev_randao,
+          block_number: blck.message.body.execution_payload.block_number,
+          gas_limit: blck.message.body.execution_payload.gas_limit,
+          gas_used: blck.message.body.execution_payload.gas_used,
+          timestamp: blck.message.body.execution_payload.timestamp,
+          extra_data: blck.message.body.execution_payload.extra_data,
+          base_fee_per_gas:
+            blck.message.body.execution_payload.base_fee_per_gas,
+          block_hash: blck.message.body.execution_payload.block_hash,
+          transactions_root:
+            hash_tree_root(blck.message.body.execution_payload.transactions)))),
+    signature: blck.signature)
--- a/beacon_chain/spec/mev/capella_mev.nim
+++ b/beacon_chain/spec/mev/capella_mev.nim
@ -11,6 +11,7 @@ import ".."/datatypes/[altair, capella]
 from stew/byteutils import to0xHex

 from ../datatypes/bellatrix import ExecutionAddress
+from ../eth2_merkleization import hash_tree_root

 type
  # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/bellatrix/builder.md#validatorregistrationv1
@ -116,3 +117,43 @@ func shortLog*(v: SignedBlindedBeaconBlock): auto =
    blck: shortLog(v.message),
    signature: shortLog(v.signature)
  )
+
+func toSignedBlindedBeaconBlock*(blck: capella.SignedBeaconBlock):
+    SignedBlindedBeaconBlock =
+  SignedBlindedBeaconBlock(
+    message: BlindedBeaconBlock(
+      slot: blck.message.slot,
+      proposer_index: blck.message.proposer_index,
+      parent_root: blck.message.parent_root,
+      state_root: blck.message.state_root,
+      body: BlindedBeaconBlockBody(
+        randao_reveal: blck.message.body.randao_reveal,
+        eth1_data: blck.message.body.eth1_data,
+        graffiti: blck.message.body.graffiti,
+        proposer_slashings: blck.message.body.proposer_slashings,
+        attester_slashings: blck.message.body.attester_slashings,
+        attestations: blck.message.body.attestations,
+        deposits: blck.message.body.deposits,
+        voluntary_exits: blck.message.body.voluntary_exits,
+        sync_aggregate: blck.message.body.sync_aggregate,
+        execution_payload_header: ExecutionPayloadHeader(
+          parent_hash: blck.message.body.execution_payload.parent_hash,
+          fee_recipient: blck.message.body.execution_payload.fee_recipient,
+          state_root: blck.message.body.execution_payload.state_root,
+          receipts_root: blck.message.body.execution_payload.receipts_root,
+          logs_bloom: blck.message.body.execution_payload.logs_bloom,
+          prev_randao: blck.message.body.execution_payload.prev_randao,
+          block_number: blck.message.body.execution_payload.block_number,
+          gas_limit: blck.message.body.execution_payload.gas_limit,
+          gas_used: blck.message.body.execution_payload.gas_used,
+          timestamp: blck.message.body.execution_payload.timestamp,
+          extra_data: blck.message.body.execution_payload.extra_data,
+          base_fee_per_gas:
+            blck.message.body.execution_payload.base_fee_per_gas,
+          block_hash: blck.message.body.execution_payload.block_hash,
+          transactions_root:
+            hash_tree_root(blck.message.body.execution_payload.transactions),
+          withdrawals_root:
+            hash_tree_root(blck.message.body.execution_payload.withdrawals)),
+        bls_to_execution_changes: blck.message.body.bls_to_execution_changes)),
+    signature: blck.signature)
--- a/beacon_chain/spec/mev/deneb_mev.nim
+++ b/beacon_chain/spec/mev/deneb_mev.nim
@ -11,6 +11,7 @@ import ".."/datatypes/[altair, deneb]

 from stew/byteutils import to0xHex
 from ".."/datatypes/capella import SignedBLSToExecutionChange
+from ".."/eth2_merkleization import hash_tree_root

 type
  # https://github.com/ethereum/builder-specs/blob/v0.4.0/specs/deneb/builder.md#builderbid
@ -103,3 +104,44 @@ func shortLog*(v: SignedBlindedBeaconBlock): auto =
    blck: shortLog(v.message),
    signature: shortLog(v.signature)
  )
+
+func toSignedBlindedBeaconBlock*(blck: deneb.SignedBeaconBlock):
+    SignedBlindedBeaconBlock =
+  SignedBlindedBeaconBlock(
+    message: BlindedBeaconBlock(
+      slot: blck.message.slot,
+      proposer_index: blck.message.proposer_index,
+      parent_root: blck.message.parent_root,
+      state_root: blck.message.state_root,
+      body: BlindedBeaconBlockBody(
+        randao_reveal: blck.message.body.randao_reveal,
+        eth1_data: blck.message.body.eth1_data,
+        graffiti: blck.message.body.graffiti,
+        proposer_slashings: blck.message.body.proposer_slashings,
+        attester_slashings: blck.message.body.attester_slashings,
+        attestations: blck.message.body.attestations,
+        deposits: blck.message.body.deposits,
+        voluntary_exits: blck.message.body.voluntary_exits,
+        sync_aggregate: blck.message.body.sync_aggregate,
+        execution_payload_header: ExecutionPayloadHeader(
+          parent_hash: blck.message.body.execution_payload.parent_hash,
+          fee_recipient: blck.message.body.execution_payload.fee_recipient,
+          state_root: blck.message.body.execution_payload.state_root,
+          receipts_root: blck.message.body.execution_payload.receipts_root,
+          logs_bloom: blck.message.body.execution_payload.logs_bloom,
+          prev_randao: blck.message.body.execution_payload.prev_randao,
+          block_number: blck.message.body.execution_payload.block_number,
+          gas_limit: blck.message.body.execution_payload.gas_limit,
+          gas_used: blck.message.body.execution_payload.gas_used,
+          timestamp: blck.message.body.execution_payload.timestamp,
+          extra_data: blck.message.body.execution_payload.extra_data,
+          base_fee_per_gas:
+            blck.message.body.execution_payload.base_fee_per_gas,
+          block_hash: blck.message.body.execution_payload.block_hash,
+          transactions_root:
+            hash_tree_root(blck.message.body.execution_payload.transactions),
+          withdrawals_root:
+            hash_tree_root(blck.message.body.execution_payload.withdrawals)),
+        bls_to_execution_changes: blck.message.body.bls_to_execution_changes,
+        blob_kzg_commitments: blck.message.body.blob_kzg_commitments)),
+    signature: blck.signature)
--- a/ncli/resttest-rules.json
+++ b/ncli/resttest-rules.json
@ -3369,6 +3369,190 @@
    },
    "response": {"status": {"operator": "equals", "value": "400"}}
  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/head",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {
+      "status": {"operator": "equals", "value": "200"},
+      "headers": [
+        {"key": "Content-Type", "value": "application/json", "operator": "equals"},
+        {"key": "Eth-Consensus-Version", "value": ["phase0", "altair", "bellatrix"], "operator": "oneof"}
+      ],
+      "body": [{"operator": "jstructcmpns", "value": {"version": "", "data": {"message": {"slot": "", "proposer_index": "", "parent_root": "", "state_root": "", "body": {"randao_reveal": "", "eth1_data": {"deposit_root": "", "deposit_count": "", "block_hash": ""}, "graffiti": "", "proposer_slashings": [{"signed_header_1": {"message": {"slot": "", "proposer_index": "", "parent_root": "", "state_root": "", "body_root": ""},"signature": ""}, "signed_header_2": {"message": {"slot": "", "proposer_index": "", "parent_root": "", "state_root": "", "body_root": ""},"signature": ""}}], "attester_slashings": [{"attestation_1": {"attesting_indices": [""], "signature": "", "data": {"slot": "", "index": "", "beacon_block_root": "", "source": {"epoch": "", "root": ""}, "target": {"epoch": "", "root": ""}}}, "attestation_2": {"attesting_indices": [""], "signature": "", "data": {"slot": "", "index": "", "beacon_block_root": "", "source": {"epoch": "", "root": ""}, "target": {"epoch": "", "root": ""}}}}], "attestations": [{"aggregation_bits": "", "signature": "", "data": {"slot": "", "index": "", "beacon_block_root": "", "source": {"epoch": "", "root": ""}, "target": {"epoch": "", "root": ""}}}], "deposits": [{"proof": [""], "data": {"pubkey": "", "withdrawal_credentials": "", "amount": "", "signature": ""}}], "voluntary_exits": [{"message": {"epoch": "", "validator_index": ""}, "signature": ""}]}}, "signature": ""}}}]
+    }
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/genesis",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {
+      "status": {"operator": "equals", "value": "200"},
+      "headers": [
+        {"key": "Content-Type", "value": "application/json", "operator": "equals"},
+        {"key": "Eth-Consensus-Version", "value": ["phase0", "altair", "bellatrix"], "operator": "oneof"}
+      ],
+      "body": [{"operator": "jstructcmpns", "value": {"version": "", "data": {"message": {"slot": "", "proposer_index": "", "parent_root": "", "state_root": "", "body": {"randao_reveal": "", "eth1_data": {"deposit_root": "", "deposit_count": "", "block_hash": ""}, "graffiti": "", "proposer_slashings": [{"signed_header_1": {"message": {"slot": "", "proposer_index": "", "parent_root": "", "state_root": "", "body_root": ""},"signature": ""}, "signed_header_2": {"message": {"slot": "", "proposer_index": "", "parent_root": "", "state_root": "", "body_root": ""},"signature": ""}}], "attester_slashings": [{"attestation_1": {"attesting_indices": [""], "signature": "", "data": {"slot": "", "index": "", "beacon_block_root": "", "source": {"epoch": "", "root": ""}, "target": {"epoch": "", "root": ""}}}, "attestation_2": {"attesting_indices": [""], "signature": "", "data": {"slot": "", "index": "", "beacon_block_root": "", "source": {"epoch": "", "root": ""}, "target": {"epoch": "", "root": ""}}}}], "attestations": [{"aggregation_bits": "", "signature": "", "data": {"slot": "", "index": "", "beacon_block_root": "", "source": {"epoch": "", "root": ""}, "target": {"epoch": "", "root": ""}}}], "deposits": [{"proof": [""], "data": {"pubkey": "", "withdrawal_credentials": "", "amount": "", "signature": ""}}], "voluntary_exits": [{"message": {"epoch": "", "validator_index": ""}, "signature": ""}]}}, "signature": ""}}}]
+    }
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/finalized",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {
+      "status": {"operator": "equals", "value": "200"},
+      "headers": [
+        {"key": "Content-Type", "value": "application/json", "operator": "equals"},
+        {"key": "Eth-Consensus-Version", "value": ["phase0", "altair", "bellatrix"], "operator": "oneof"}
+      ],
+      "body": [{"operator": "jstructcmpns", "value": {"version": "", "data": {"message": {"slot": "", "proposer_index": "", "parent_root": "", "state_root": "", "body": {"randao_reveal": "", "eth1_data": {"deposit_root": "", "deposit_count": "", "block_hash": ""}, "graffiti": "", "proposer_slashings": [{"signed_header_1": {"message": {"slot": "", "proposer_index": "", "parent_root": "", "state_root": "", "body_root": ""},"signature": ""}, "signed_header_2": {"message": {"slot": "", "proposer_index": "", "parent_root": "", "state_root": "", "body_root": ""},"signature": ""}}], "attester_slashings": [{"attestation_1": {"attesting_indices": [""], "signature": "", "data": {"slot": "", "index": "", "beacon_block_root": "", "source": {"epoch": "", "root": ""}, "target": {"epoch": "", "root": ""}}}, "attestation_2": {"attesting_indices": [""], "signature": "", "data": {"slot": "", "index": "", "beacon_block_root": "", "source": {"epoch": "", "root": ""}, "target": {"epoch": "", "root": ""}}}}], "attestations": [{"aggregation_bits": "", "signature": "", "data": {"slot": "", "index": "", "beacon_block_root": "", "source": {"epoch": "", "root": ""}, "target": {"epoch": "", "root": ""}}}], "deposits": [{"proof": [""], "data": {"pubkey": "", "withdrawal_credentials": "", "amount": "", "signature": ""}}], "voluntary_exits": [{"message": {"epoch": "", "validator_index": ""}, "signature": ""}]}}, "signature": ""}}}]
+    }
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/0",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {
+      "status": {"operator": "equals", "value": "200"},
+      "headers": [
+        {"key": "Content-Type", "value": "application/json", "operator": "equals"},
+        {"key": "Eth-Consensus-Version", "value": ["phase0", "altair", "bellatrix"], "operator": "oneof"}
+      ],
+      "body": [{"operator": "jstructcmpns", "value": {"version": "", "data": {"message": {"slot": "", "proposer_index": "", "parent_root": "", "state_root": "", "body": {"randao_reveal": "", "eth1_data": {"deposit_root": "", "deposit_count": "", "block_hash": ""}, "graffiti": "", "proposer_slashings": [{"signed_header_1": {"message": {"slot": "", "proposer_index": "", "parent_root": "", "state_root": "", "body_root": ""},"signature": ""}, "signed_header_2": {"message": {"slot": "", "proposer_index": "", "parent_root": "", "state_root": "", "body_root": ""},"signature": ""}}], "attester_slashings": [{"attestation_1": {"attesting_indices": [""], "signature": "", "data": {"slot": "", "index": "", "beacon_block_root": "", "source": {"epoch": "", "root": ""}, "target": {"epoch": "", "root": ""}}}, "attestation_2": {"attesting_indices": [""], "signature": "", "data": {"slot": "", "index": "", "beacon_block_root": "", "source": {"epoch": "", "root": ""}, "target": {"epoch": "", "root": ""}}}}], "attestations": [{"aggregation_bits": "", "signature": "", "data": {"slot": "", "index": "", "beacon_block_root": "", "source": {"epoch": "", "root": ""}, "target": {"epoch": "", "root": ""}}}], "deposits": [{"proof": [""], "data": {"pubkey": "", "withdrawal_credentials": "", "amount": "", "signature": ""}}], "voluntary_exits": [{"message": {"epoch": "", "validator_index": ""}, "signature": ""}]}}, "signature": ""}}}]
+    }
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/18446744073709551615",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {
+      "status": {"operator": "equals", "value": "404"},
+      "headers": [
+        {"key": "Content-Type", "value": "application/json", "operator": "equals"},
+        {"key": "Eth-Consensus-Version", "operator": "notexists"}
+      ],
+      "body": [{"operator": "jstructcmpns", "value": {"code": 404, "message": ""}}]
+    }
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/18446744073709551616",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {
+      "status": {"operator": "equals", "value": "400"},
+      "headers": [
+        {"key": "Content-Type", "value": "application/json", "operator": "equals"},
+        {"key": "Eth-Consensus-Version", "operator": "notexists"}
+      ],
+      "body": [{"operator": "jstructcmpns", "value": {"code": 400, "message": ""}}]
+    }
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/0x0000000000000000000000000000000000000000000000000000000000000000",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {
+      "status": {"operator": "equals", "value": "404"},
+      "headers": [
+        {"key": "Content-Type", "value": "application/json", "operator": "equals"},
+        {"key": "Eth-Consensus-Version", "operator": "notexists"}
+      ],
+      "body": [{"operator": "jstructcmpns", "value": {"code": 404, "message": ""}}]
+    }
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/18446744073709551616",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {
+      "status": {"operator": "equals", "value": "400"},
+      "headers": [
+        {"key": "Content-Type", "value": "application/json", "operator": "equals"},
+        {"key": "Eth-Consensus-Version", "operator": "notexists"}
+      ],
+      "body": [{"operator": "jstructcmpns", "value": {"code": 400, "message": ""}}]
+    }
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/heat",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {"status": {"operator": "equals", "value": "400"}}
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/geneziz",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {"status": {"operator": "equals", "value": "400"}}
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/finalised",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {"status": {"operator": "equals", "value": "400"}}
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/foobar",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {"status": {"operator": "equals", "value": "400"}}
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/0x",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {"status": {"operator": "equals", "value": "400"}}
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/0x0",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {"status": {"operator": "equals", "value": "400"}}
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/0x00",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {"status": {"operator": "equals", "value": "400"}}
+  },
+  {
+    "topics": ["beacon", "beacon_blindedblocks_blockid"],
+    "request": {
+      "url": "/eth/v1/beacon/blinded_blocks/0x000000000000000000000000000000000000000000000000000000000000000000",
+      "headers": {"Accept": "application/json"}
+    },
+    "response": {"status": {"operator": "equals", "value": "400"}}
+  },
  {
    "topics": ["beacon", "beacon_block_blinded_blocks"],
    "request": {
--- a/tests/all_tests.nim
+++ b/tests/all_tests.nim
@ -44,6 +44,7 @@ import # Unit test
  ./test_statediff,
  ./test_sync_committee_pool,
  ./test_sync_manager,
+  ./test_toblindedblock,
  ./test_validator_change_pool,
  ./test_validator_pool,
  ./test_zero_signature,
--- a/tests/test_toblindedblock.nim
+++ b/tests/test_toblindedblock.nim
@ -0,0 +1,131 @@
+# beacon_chain
+# Copyright (c) 2024 Status Research & Development GmbH
+# Licensed and distributed under either of
+#   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
+#   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
+# at your option. This file may not be copied, modified, or distributed except according to those terms.
+
+{.used.}
+
+import
+  # Beacon chain internals
+  ../beacon_chain/spec/helpers,
+  ../beacon_chain/spec/datatypes/[bellatrix, capella],
+  ../beacon_chain/spec/mev/[bellatrix_mev, capella_mev, deneb_mev],
+  # Test utilities
+  unittest2
+
+
+template do_check() =
+  check:
+    hash_tree_root(b.message) == hash_tree_root(
+      b.toSignedBlindedBeaconBlock.message)
+    b.signature == b.toSignedBlindedBeaconBlock.signature
+
+const
+  nondefaultEth1Data = Eth1Data(
+    deposit_root: Eth2Digest.fromHex(
+      "0x55aaf2ee893f67db190d617070bd10d1583b00194fbcfda03d89baa24626f5bb"),
+    deposit_count: 1,
+    block_hash: Eth2Digest.fromHex(
+      "0xe617d58db390a10741ab7d3de0ba9460b5df5e0772e9721fe33c0422a63b2677"))
+
+let nondefaultValidatorSig = ValidatorSig.fromHex(
+    "0xac08ca70066c6ea0525aa54dd867f82b86945818cb9305aae30f3bee13275dcf13d6d0680a47e889482ff2bb9a9f3cdb0588746f9e30c04645eda6d01bbd0ce6326ceb695294cb338ebace5b130c5b8f2e4f8efa63d63d5bb255c21a39da9c12")[]
+
+template bellatrix_steps() =
+  b.message.slot = 1.Slot
+  do_check
+  b.message.proposer_index = 1
+  do_check
+  b.message.state_root = Eth2Digest.fromHex(
+    "0xb277ed302ade6685d0f0765fd0659c4b448656ab697409f2935cd9ab7189e48e")
+  do_check
+  b.message.parent_root = Eth2Digest.fromHex(
+    "0x2f6eaa73ec39aeb864884a2371f3e4a8abc29d277074459e46c987418f5df430")
+  do_check
+  b.message.body.randao_reveal = nondefaultValidatorSig
+  do_check
+  b.message.body.eth1_data = nondefaultEth1Data
+  do_check
+  distinctBase(b.message.body.graffiti)[0] = 1
+  do_check
+  check: b.message.body.proposer_slashings.add(default(ProposerSlashing))
+  do_check
+  check: b.message.body.attester_slashings.add(default(AttesterSlashing))
+  do_check
+  check: b.message.body.attestations.add(
+    Attestation(aggregation_bits: CommitteeValidatorsBits.init(1)))
+  do_check
+  check: b.message.body.deposits.add(default(Deposit))
+  do_check
+  check: b.message.body.voluntary_exits.add(default(SignedVoluntaryExit))
+  do_check
+  b.message.body.sync_aggregate.sync_committee_signature =
+    nondefaultValidatorSig
+  do_check
+  b.message.body.execution_payload.parent_hash = Eth2Digest.fromHex(
+    "0x941bdf6ccf731a7ede6bac0c9533ecee5e3dc5081ea59d57c3fd8c624eeca85d")
+  do_check
+  b.message.body.execution_payload.fee_recipient =
+    ExecutionAddress.fromHex("0x1234567812345678123456781234567812345678")
+  do_check
+  b.message.body.execution_payload.state_root = Eth2Digest.fromHex(
+    "0x9e7d9bca96a9d0af9013ad6abb8708988beef02d58c16ba1a90075960b99c2ff")
+  do_check
+  b.message.body.execution_payload.receipts_root = Eth2Digest.fromHex(
+    "0x0e66a5007cf7bb16f4398adbbd01b34067a80faaef41a0a6be324c5fdb93a6df")
+  do_check
+  b.message.body.execution_payload.logs_bloom.data[0] = 2
+  do_check
+  b.message.body.execution_payload.prev_randao = Eth2Digest.fromHex(
+    "0x8aa830156370e6a5ec7679d7e5ee712dd87f24fef76a1954a03c1df8c68bc0fd")
+  do_check
+  b.message.body.execution_payload.block_number = 3
+  do_check
+  b.message.body.execution_payload.gas_limit = 4
+  do_check
+  b.message.body.execution_payload.gas_used = 5
+  do_check
+  b.message.body.execution_payload.timestamp = 6
+  do_check
+  check: b.message.body.execution_payload.extra_data.add 0'u8
+  do_check
+  b.message.body.execution_payload.base_fee_per_gas = 7.u256
+  do_check
+  b.message.body.execution_payload.block_hash = Eth2Digest.fromHex(
+    "0x4b1aed517ac48bfbf6ab19846923d5256897fbc934c20ca5b8c486bfe71c6ef1")
+  do_check
+  check: b.message.body.execution_payload.transactions.add default(Transaction)
+  do_check
+
+template capella_steps() =
+  check: b.message.body.bls_to_execution_changes.add(
+    default(SignedBLSToExecutionChange))
+  do_check
+  check: b.message.body.execution_payload.withdrawals.add(default(
+    Withdrawal))
+  do_check
+
+template deneb_steps() =
+  check: b.message.body.blob_kzg_commitments.add(default(KzgCommitment))
+  do_check
+
+suite "Blinded block conversions":
+  test "Bellatrix toSignedBlindedBlock":
+    var b = default(bellatrix.SignedBeaconBlock)
+    do_check
+    bellatrix_steps
+
+  test "Capella toSignedBlindedBlock":
+    var b = default(capella.SignedBeaconBlock)
+    do_check
+    bellatrix_steps
+    capella_steps
+
+  test "Deneb toSignedBlindedBlock":
+    var b = default(deneb.SignedBeaconBlock)
+    do_check
+    bellatrix_steps
+    capella_steps
+    deneb_steps