From 0445a471a1c2ed3b2ef31c30d04c2de665dcb865 Mon Sep 17 00:00:00 2001
From: mingda <leimingda@pku.edu.cn>
Date: Sat, 25 Jul 2020 15:49:01 +0800
Subject: [PATCH] add version control to storage

---
 contracts/impl/Storage.sol | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/contracts/impl/Storage.sol b/contracts/impl/Storage.sol
index 3135772..f805dc1 100644
--- a/contracts/impl/Storage.sol
+++ b/contracts/impl/Storage.sol
@@ -103,4 +103,9 @@ contract Storage is InitializableOwnable, ReentrancyGuard {
     function getTotalQuoteCapital() public view returns (uint256) {
         return IDODOLpToken(_QUOTE_CAPITAL_TOKEN_).totalSupply();
     }
+
+    // ============ Version Control ============
+    function version() external pure returns (uint256) {
+        return 1;
+    }
 }