add advanced dpp

contracts/DODOPrivatePool/impl/DPPAdvanced.sol

@@ -0,0 +1,63 @@
+/*
+
+    Copyright 2020 DODO ZOO.
+    SPDX-License-Identifier: Apache-2.0
+
+*/
+
+pragma solidity 0.6.9;
+pragma experimental ABIEncoderV2;
+
+import {DPP} from "./DPP.sol";
+
+/**
+ * @title DODO PrivatePool
+ * @author DODO Breeder
+ *
+ * @notice Advanced DODOPrivatePool
+ */
+contract DPPAdvanced is DPP {
+
+    function tuneParameters(
+        uint256 newLpFeeRate,
+        uint256 newI,
+        uint256 newK,
+        uint256 minBaseReserve,
+        uint256 minQuoteReserve
+    ) public preventReentrant onlyOwner returns (bool) {
+        require(
+            _BASE_RESERVE_ >= minBaseReserve && _QUOTE_RESERVE_ >= minQuoteReserve,
+            "RESERVE_AMOUNT_IS_NOT_ENOUGH"
+        );
+        require(newLpFeeRate <= 1e18, "LP_FEE_RATE_OUT_OF_RANGE");
+        require(newK <= 1e18, "K_OUT_OF_RANGE");
+        require(newI > 0 && newI <= 1e36, "I_OUT_OF_RANGE");
+        _LP_FEE_RATE_ = uint64(newLpFeeRate);
+        _K_ = uint64(newK);
+        _I_ = uint128(newI);
+        emit LpFeeRateChange(newLpFeeRate);
+        return true;
+    }
+
+
+    function tunePrice(
+        uint256 newI,
+        uint256 minBaseReserve,
+        uint256 minQuoteReserve
+    ) public preventReentrant onlyOwner returns (bool) {
+        require(
+            _BASE_RESERVE_ >= minBaseReserve && _QUOTE_RESERVE_ >= minQuoteReserve,
+            "RESERVE_AMOUNT_IS_NOT_ENOUGH"
+        );
+        require(newI > 0 && newI <= 1e36, "I_OUT_OF_RANGE");
+        _I_ = uint128(newI);
+        return true;
+    }
+
+
+    // ============ Version Control ============
+
+    function version() override external pure returns (string memory) {
+        return "DPP Advanced 1.0.0";
+    }
+}