1 files changed, 66 insertions, 0 deletions
diff --git a/packages/contracts/src/2.0.0/forwarder/interfaces/IExpectedResults.sol b/packages/contracts/src/2.0.0/forwarder/interfaces/IExpectedResults.sol
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+++ b/packages/contracts/src/2.0.0/forwarder/interfaces/IExpectedResults.sol
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+/*
+
+  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";
+
+
+contract IExpectedResults {
+
+    /// @dev Calculates a total FillResults for buying makerAssetFillAmount over all orders.
+    ///      Including the fees required to be paid. 
+    /// @param orders An array of Order struct containing order specifications.
+    /// @param makerAssetFillAmount A number representing the amount of this order to fill.
+    /// @return totalFillResults Amounts filled and fees paid by maker and taker.
+    function calculateMarketBuyResults(
+        LibOrder.Order[] memory orders,
+        uint256 makerAssetFillAmount
+    )
+        public
+        view
+        returns (LibFillResults.FillResults memory totalFillResults);
+
+    /// @dev Calculates a FillResults total for selling takerAssetFillAmount over all orders. 
+    ///      Including the fees required to be paid. 
+    /// @param orders An array of Order struct containing order specifications.
+    /// @param takerAssetFillAmount A number representing the amount of this order to fill.
+    /// @return totalFillResults Amounts filled and fees paid by maker and taker.
+    function calculateMarketSellResults(
+        LibOrder.Order[] memory orders,
+        uint256 takerAssetFillAmount
+    )
+        public
+        view
+        returns (LibFillResults.FillResults memory totalFillResults);
+
+    /// @dev Calculates fill results for buyFeeTokens. This handles fees on buying ZRX
+    ///      so the end result is the expected amount of ZRX (not less after fees).
+    /// @param orders An array of Order struct containing order specifications.
+    /// @param zrxFillAmount A number representing the amount zrx to buy
+    /// @return totalFillResults Expected fill result amounts from buying fees
+    function calculateMarketBuyZrxResults(
+        LibOrder.Order[] memory orders,
+        uint256 zrxFillAmount
+    )
+        public
+        view
+        returns (LibFillResults.FillResults memory totalFillResults);
+}
+\ No newline at end of file