From 296d55e69a1f10a6cc9cda6704bf96b6f2b6ddf0 Mon Sep 17 00:00:00 2001
From: eric gong <egong82@gmail.com>
Date: Sat, 2 Sep 2017 21:25:12 -0400
Subject: [PATCH] Created BaseDB wrapper

---
 evm/vm/base.py | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/evm/vm/base.py b/evm/vm/base.py
index ca669c0c79..c56e2ea76a 100644
--- a/evm/vm/base.py
+++ b/evm/vm/base.py
@@ -19,6 +19,29 @@
     get_block_header_by_hash,
 )
 
+from evm.db.backends.base import (
+    BaseDB
+)
+
+
+class DBWrapper(BaseDB):
+    """
+    Wraps BaseDB class for read only properties
+    """
+
+    def __init__(self, db):
+        self._db = db
+
+    @property
+    def db(self):
+        return self._db
+
+    def get(self, key):
+        return self._db[key]
+
+    def exists(self, key):
+        return key in self._db[key]
+
 
 class VM(object):
     """