refactoring route intf

contracts/SmartRoute/intf/IDODOSellHelper.sol

@@ -1,14 +0,0 @@
-/*
-
-    Copyright 2020 DODO ZOO.
-    SPDX-License-Identifier: Apache-2.0
-
-*/
-
-pragma solidity 0.6.9;
-pragma experimental ABIEncoderV2;
-
-interface IDODOSellHelper {
-    function querySellQuoteToken(address dodo, uint256 amount) external view returns (uint256);
-    function querySellBaseToken(address dodo, uint256 amount) external view returns (uint256);
-}

contracts/SmartRoute/intf/IDODOV1Proxy01.sol

@@ -0,0 +1,32 @@
+/*
+
+    Copyright 2020 DODO ZOO.
+    SPDX-License-Identifier: Apache-2.0
+
+*/
+
+pragma solidity 0.6.9;
+pragma experimental ABIEncoderV2;
+
+interface IDODOV1Proxy01 {
+    function dodoSwap(
+        address fromToken,
+        address toToken,
+        uint256 fromTokenAmount,
+        uint256 minReturnAmount,
+        address[] memory dodoPairs,
+        uint8[] memory directions,
+        uint256 deadline
+    ) external payable returns (uint256 returnAmount);
+
+    function externalSwap(
+        address fromToken,
+        address toToken,
+        address approveTarget,
+        address to,
+        uint256 fromTokenAmount,
+        uint256 minReturnAmount,
+        bytes memory callDataConcat,
+        uint256 deadline
+    ) external payable returns (uint256 returnAmount);
+}

contracts/SmartRoute/intf/IDODOV2.sol

@@ -35,14 +35,14 @@ interface IDODOV2 {
         uint256 i,
         uint256 k
     ) external returns (address newVendingMachine);
+    
+    function buyShares(address to) external returns (uint256,uint256,uint256);
 
     // ============= permit =================
     function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
+    function sellShares(address to) external returns (uint256,uint256);
     // ======================================
 
-    function buyShares(address to) external returns (uint256,uint256,uint256);
-
-    function sellShares(address to) external returns (uint256,uint256);
 
     //========== DODOPrivatePool ===========
 
@@ -68,12 +68,4 @@ interface IDODOV2 {
         uint256 baseOutAmount,
         uint256 quoteOutAmount
     ) external; 
-
-
-    //========== IDODOApprove  =============
-
-    function claimTokens(address token,address who,address dest,uint256 amount) external;
-    
-    function getDODOProxy() external view returns (address);
-
 }

contracts/SmartRoute/intf/IDODOV2Proxy01.sol

@@ -8,7 +8,9 @@
 pragma solidity 0.6.9;
 pragma experimental ABIEncoderV2;
 
-interface IDODOV2Proxy01 {
+import {IDODOV1Proxy01} from './IDODOV1Proxy01.sol';
+
+interface IDODOV2Proxy01 is IDODOV1Proxy01 {
     function dodoSwapETHToToken(
         address payable assetTo,
         address toToken,
@@ -40,17 +42,6 @@ interface IDODOV2Proxy01 {
         uint256 deadline
     ) external returns (uint256 returnAmount);
 
-    function externalSwap(
-        address fromToken,
-        address toToken,
-        address approveTarget,
-        address to,
-        uint256 fromTokenAmount,
-        uint256 minReturnAmount,
-        bytes memory callDataConcat,
-        uint256 deadline
-    ) external payable returns (uint256 returnAmount);
-
     function createDODOVendingMachine(
         address assetTo,
         address baseToken,
@@ -82,6 +73,8 @@ interface IDODOV2Proxy01 {
             uint256 quoteAdjustedInAmount
         );
 
+    // ====================  Permit ================================
+
     function removeDVMLiquidity(
         address DVMAddress,
         address payable to,
@@ -92,7 +85,6 @@ interface IDODOV2Proxy01 {
         uint256 deadline
     ) external returns (uint256 baseOutAmount, uint256 quoteOutAmount);
 
-    // ====================  Permit ================================
     function removeDVMLiquidityWithPermit(
         address DVMAddress,
         address payable to,