DPP factory and init

contracts/intf/IFeeRateModel.sol

@@ -1,13 +0,0 @@
-/*
-
-    Copyright 2020 DODO ZOO.
-    SPDX-License-Identifier: Apache-2.0
-
-*/
-
-pragma solidity 0.6.9;
-pragma experimental ABIEncoderV2;
-
-interface IFeeRateModel {
-    function getFeeRate(address trader) external view returns (uint256);
-}

contracts/intf/ISmartApprove.sol

@@ -12,4 +12,5 @@ import {IERC20} from "./IERC20.sol";
 
 interface ISmartApprove {
     function claimTokens(IERC20 token,address who,address dest,uint256 amount) external;
+    function getSmartSwap() external view returns (address);
 }