commit c273f7ec1da532e6de77b6e4f398f99c6d879e95
Author: Ricardo Guilherme Schmidt <3esmit@gmail.com>
Date:   Tue Nov 28 01:33:25 2017 -0200

    base structure of upgradable republic

diff --git a/contracts/deploy/DelegatedCall.sol b/contracts/deploy/DelegatedCall.sol
new file mode 100644
index 0000000..cbed2b4
--- /dev/null
+++ b/contracts/deploy/DelegatedCall.sol
@@ -0,0 +1,33 @@
+pragma solidity ^0.4.17;
+
+
+/**
+ * @title DelegatedCall
+ * @author Ricardo Guilherme Schmidt (Status Research & Development GmbH) 
+ * @dev Abstract contract that delegates calls by `delegated` modifier to result of `_target()`
+ */
+contract DelegatedCall {
+    /**
+     * @dev delegates the call of this function
+     */
+    modifier delegated {
+        require(_target().delegatecall(msg.data)); //require successfull delegate call to remote `_target()`
+        assembly {
+            let outSize := returndatasize 
+            let outDataPtr := mload(0x40) //load memory
+            returndatacopy(outDataPtr, 0, outSize) //copy last return into pointer
+            return(outDataPtr, outSize) 
+        }
+        assert(false); //should never reach here
+        _; //never will execute local logic
+    }
+
+    /**
+     * @dev defines the address for delegation of calls
+     */
+    function _target()
+        internal
+        constant
+        returns(address);
+
+}