add mixSwapV1

contracts/SmartRoute/intf/IChi.sol

@@ -1,13 +1,6 @@
-/*
-
-    Copyright 2020 DODO ZOO.
-    SPDX-License-Identifier: Apache-2.0
-
-*/
-
 pragma solidity 0.6.9;
 pragma experimental ABIEncoderV2;
 
 interface IChi {
     function freeUpTo(uint256 value) external returns (uint256);
-}
+}

contracts/SmartRoute/intf/IDODOV1Proxy01.sol

@@ -29,4 +29,15 @@ interface IDODOV1Proxy01 {
         bytes memory callDataConcat,
         uint256 deadLine
     ) external payable returns (uint256 returnAmount);
+
+    function mixSwapV1(
+        address fromToken,
+        address toToken,
+        uint256 fromTokenAmount,
+        uint256 minReturnAmount,
+        address[] memory mixPairs,
+        uint8[] memory directions,
+        address[] memory portionPath,
+        uint256 deadLine
+    ) external payable returns (uint256 returnAmount);
 }

contracts/SmartRoute/intf/IUni.sol

@@ -0,0 +1,12 @@
+pragma solidity 0.6.9;
+pragma experimental ABIEncoderV2;
+
+interface IUni {
+    function swapExactTokensForTokens(
+        uint amountIn,
+        uint amountOutMin,
+        address[] calldata path,
+        address to,
+        uint deadline
+    ) external returns (uint[] memory amounts);
+}