only allow blob tx after cancun fork

core/error.go

@@ -110,4 +110,7 @@ var (
 
 	// ErrBlobTxCreate is returned if a blob transaction has no explicit to field.
 	ErrBlobTxCreate = errors.New("blob transaction of type create")
+
+	// ErrBlobTxTooEarly is returned if a blob transaction is found before cancun fork.
+	ErrBlobTxTooEarly = errors.New("blob transaction is only allowed after cancun fork")
 )

core/state_transition.go

@@ -319,25 +319,26 @@ func (st *StateTransition) preCheck() error {
 			}
 		}
 	}
-	// Check the blob version validity
+
-	if msg.BlobHashes != nil {
-		// The to field of a blob tx type is mandatory, and a `BlobTx` transaction internally
-		// has it as a non-nillable value, so any msg derived from blob transaction has it non-nil.
-		// However, messages created through RPC (eth_call) don't have this restriction.
-		if msg.To == nil {
-			return ErrBlobTxCreate
-		}
-		if len(msg.BlobHashes) == 0 {
-			return ErrMissingBlobHashes
-		}
-		for i, hash := range msg.BlobHashes {
-			if !kzg4844.IsValidVersionedHash(hash[:]) {
-				return fmt.Errorf("blob %d has invalid hash version", i)
-			}
-		}
-	}
 	// Check that the user is paying at least the current blob fee
 	if st.evm.ChainConfig().IsCancun(st.evm.Context.BlockNumber, st.evm.Context.Time) {
+		// Check the blob version validity
+		if msg.BlobHashes != nil {
+			// The to field of a blob tx type is mandatory, and a `BlobTx` transaction internally
+			// has it as a non-nillable value, so any msg derived from blob transaction has it non-nil.
+			// However, messages created through RPC (eth_call) don't have this restriction.
+			if msg.To == nil {
+				return ErrBlobTxCreate
+			}
+			if len(msg.BlobHashes) == 0 {
+				return ErrMissingBlobHashes
+			}
+			for i, hash := range msg.BlobHashes {
+				if !kzg4844.IsValidVersionedHash(hash[:]) {
+					return fmt.Errorf("blob %d has invalid hash version", i)
+				}
+			}
+		}
 		if st.blobGasUsed() > 0 {
 			// Skip the checks if gas fields are zero and blobBaseFee was explicitly disabled (eth_call)
 			skipCheck := st.evm.Config.NoBaseFee && msg.BlobGasFeeCap.BitLen() == 0
@@ -350,6 +351,10 @@ func (st *StateTransition) preCheck() error {
 				}
 			}
 		}
+	} else {
+		if msg.BlobHashes != nil {
+			return ErrBlobTxTooEarly
+		}
 	}
 	return st.buyGas()
 }