bug fix - validateTxType

contract/contract.go

@@ -323,11 +323,13 @@ func validateTxType(txType types.TxType, amount *big.Int, payloadSize int, versi
 		// starting from hardfork version 3, transactions expected to CALL a
 		// contract but without a valid recipient will emit an error.
 		// FEEDELEGATION txns with invalid recipient are rejected on mempool.
-		if version >= 3 && txType == types.TxType_CALL {
-			// continue now and emit an error below for correct gas estimation
-		} else {
+		if !(version >= 3 && txType == types.TxType_CALL) {
+			// Here, the condition for fee delegation TX essentially being
+			// call-type, is not necessary, because it is rejected from the
+			// mempool without code hash.
 			return false, nil
 		}
+		// continue now and emit an error below for correct gas estimation
 	}
 	return true, nil
 }