1 files changed, 42 insertions, 0 deletions
diff --git a/packages/contracts/src/2.0.0/forwarder/mixins/MExpectedResults.sol b/packages/contracts/src/2.0.0/forwarder/mixins/MExpectedResults.sol
new file mode 100644
index 000000000..cf03bb32e
--- /dev/null
+++ b/packages/contracts/src/2.0.0/forwarder/mixins/MExpectedResults.sol
@@ -0,0 +1,42 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity 0.4.24;
+pragma experimental ABIEncoderV2;
+
+import "../../protocol/Exchange/libs/LibFillResults.sol";
+import "../../protocol/Exchange/libs/LibOrder.sol";
+import "../interfaces/IExpectedResults.sol";
+
+
+contract MExpectedResults is
+    IExpectedResults
+{
+
+    /// @dev Simulates the 0x Exchange fillOrder validation and calculations, without performing any state changes.
+    /// @param order An Order struct containing order specifications.
+    /// @param takerAssetFillAmount A number representing the amount of this order to fill.
+    /// @return fillResults Amounts filled and fees paid by maker and taker.
+    function calculateFillResults(
+        LibOrder.Order memory order,
+        uint256 takerAssetFillAmount
+    )
+        internal
+        view
+        returns (LibFillResults.FillResults memory fillResults);
+}