eth/catalyst: prefix payload id with version (#28246)

GetPayloadVX should only return payloads which match its version. GetPayloadV2 is a special snowflake that supports v1 and v2 payloads. This change uses a a version-specific prefix within in the payload id, basically a namespace for the version number.

beacon/engine/types.go

@@ -26,6 +26,16 @@ import (
 	"github.com/ethereum/go-ethereum/trie"
 )
 
+// PayloadVersion denotes the version of PayloadAttributes used to request the
+// building of the payload to commence.
+type PayloadVersion byte
+
+var (
+	PayloadV1 PayloadVersion = 0x1
+	PayloadV2 PayloadVersion = 0x2
+	PayloadV3 PayloadVersion = 0x3
+)
+
 //go:generate go run github.com/fjl/gencodec -type PayloadAttributes -field-override payloadAttributesMarshaling -out gen_blockparams.go
 
 // PayloadAttributes describes the environment context in which a block should
@@ -115,6 +125,21 @@ type TransitionConfigurationV1 struct {
 // PayloadID is an identifier of the payload build process
 type PayloadID [8]byte
 
+// Version returns the payload version associated with the identifier.
+func (b PayloadID) Version() PayloadVersion {
+	return PayloadVersion(b[0])
+}
+
+// Is returns whether the identifier matches any of provided payload versions.
+func (b PayloadID) Is(versions ...PayloadVersion) bool {
+	for _, v := range versions {
+		if v == b.Version() {
+			return true
+		}
+	}
+	return false
+}
+
 func (b PayloadID) String() string {
 	return hexutil.Encode(b[:])
 }