feat: Add version to BeaconEngineMessage FCU (#12089)

Co-authored-by: Dan Cline <6798349+Rjected@users.noreply.github.com>

crates/payload/primitives/src/lib.rs

@@ -324,22 +324,23 @@ where
 }
 
 /// The version of Engine API message.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Default)]
 pub enum EngineApiMessageVersion {
     /// Version 1
-    V1,
+    V1 = 1,
     /// Version 2
     ///
     /// Added in the Shanghai hardfork.
-    V2,
+    V2 = 2,
     /// Version 3
     ///
     /// Added in the Cancun hardfork.
-    V3,
+    #[default]
+    V3 = 3,
     /// Version 4
     ///
     /// Added in the Prague hardfork.
-    V4,
+    V4 = 4,
 }
 
 /// Determines how we should choose the payload to return.

crates/payload/primitives/src/traits.rs

@@ -84,7 +84,7 @@ pub trait PayloadBuilderAttributes: Send + Sync + std::fmt::Debug {
 
     /// Creates a new payload builder for the given parent block and the attributes.
     ///
-    /// Derives the unique [`PayloadId`] for the given parent and attributes
+    /// Derives the unique [`PayloadId`] for the given parent, attributes and version.
     fn try_new(
         parent: B256,
         rpc_payload_attributes: Self::RpcPayloadAttributes,