Fix POST to eth/v1/builder/blinded_blocks missing header Eth-Consensus-Version.

beacon_chain/spec/mev/rest_deneb_mev_calls.nim

@@ -28,8 +28,21 @@ proc getHeaderDeneb*(slot: Slot,
      meth: MethodGet, connection: {Dedicated, Close}.}
   ## https://github.com/ethereum/builder-specs/blob/v0.4.0/apis/builder/header.yaml
 
-proc submitBlindedBlock*(body: deneb_mev.SignedBlindedBeaconBlock
-                        ): RestPlainResponse {.
-     rest, endpoint: "/eth/v1/builder/blinded_blocks",
-     meth: MethodPost, connection: {Dedicated, Close}.}
+proc submitBlindedBlockPlain*(
+    body: deneb_mev.SignedBlindedBeaconBlock
+): RestPlainResponse {.
+   rest, endpoint: "/eth/v1/builder/blinded_blocks",
+   meth: MethodPost, connection: {Dedicated, Close}.}
+  ## https://github.com/ethereum/builder-specs/blob/v0.4.0/apis/builder/blinded_blocks.yaml
+
+proc submitBlindedBlock*(
+  client: RestClientRef,
+  body: deneb_mev.SignedBlindedBeaconBlock
+): Future[RestPlainResponse] {.
+  async: (raises: [CancelledError, RestEncodingError, RestDnsResolveError,
+                   RestCommunicationError]).} =
   ## https://github.com/ethereum/builder-specs/blob/v0.4.0/apis/builder/blinded_blocks.yaml
+  await client.submitBlindedBlockPlain(
+    body,
+    extraHeaders = @[("eth-consensus-version", toString(ConsensusFork.Deneb))]
+  )

beacon_chain/spec/mev/rest_electra_mev_calls.nim

@@ -21,8 +21,21 @@ proc getHeaderElectra*(slot: Slot,
      meth: MethodGet, connection: {Dedicated, Close}.}
   ## https://github.com/ethereum/builder-specs/blob/v0.4.0/apis/builder/header.yaml
 
-proc submitBlindedBlock*(body: electra_mev.SignedBlindedBeaconBlock
-                        ): RestPlainResponse {.
-     rest, endpoint: "/eth/v1/builder/blinded_blocks",
-     meth: MethodPost, connection: {Dedicated, Close}.}
+proc submitBlindedBlockPlain*(
+    body: electra_mev.SignedBlindedBeaconBlock
+): RestPlainResponse {.
+   rest, endpoint: "/eth/v1/builder/blinded_blocks",
+   meth: MethodPost, connection: {Dedicated, Close}.}
   ## https://github.com/ethereum/builder-specs/blob/v0.4.0/apis/builder/blinded_blocks.yaml
+
+proc submitBlindedBlock*(
+  client: RestClientRef,
+  body: electra_mev.SignedBlindedBeaconBlock
+): Future[RestPlainResponse] {.
+  async: (raises: [CancelledError, RestEncodingError, RestDnsResolveError,
+                   RestCommunicationError]).} =
+  ## https://github.com/ethereum/builder-specs/blob/v0.4.0/apis/builder/blinded_blocks.yaml
+  await client.submitBlindedBlockPlain(
+    body,
+    extraHeaders = @[("eth-consensus-version", toString(ConsensusFork.Electra))]
+  )

beacon_chain/validators/message_router_mev.nim

@@ -59,16 +59,21 @@ proc unblindAndRouteBlockMEV*(
   # protection check
   let response =
     try:
-      awaitWithTimeout(
-          payloadBuilderRestClient.submitBlindedBlock(blindedBlock),
-          BUILDER_BLOCK_SUBMISSION_DELAY_TOLERANCE):
-        return err("Submitting blinded block timed out")
+      await payloadBuilderRestClient.submitBlindedBlock(blindedBlock).
+        wait(BUILDER_BLOCK_SUBMISSION_DELAY_TOLERANCE)
       # From here on, including error paths, disallow local EL production by
       # returning Opt.some, regardless of whether on head or newBlock.
-    except RestDecodingError as exc:
-      return err("REST decoding error submitting blinded block: " & exc.msg)
-    except RestError as exc:
-      return err("exception in submitBlindedBlock: " & exc.msg)
+    except AsyncTimeoutError:
+      return err("Submitting blinded block timed out")
+    except RestEncodingError as exc:
+      return err(
+        "REST encoding error submitting blinded block, reason " & exc.msg)
+    except RestDnsResolveError as exc:
+      return err(
+        "REST unable to resolve remote host, reason " & exc.msg)
+    except RestCommunicationError as exc:
+      return err(
+        "REST unable to communicate with remote host, reason " & exc.msg)
 
   const httpOk = 200
   if response.status != httpOk: