1 files changed, 30 insertions, 5 deletions
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MExchangeCore.sol b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MExchangeCore.sol
index c165b647c..d85913e0f 100644
--- a/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MExchangeCore.sol
+++ b/packages/contracts/src/2.0.0/protocol/Exchange/mixins/MExchangeCore.sol
@@ -59,6 +59,19 @@ contract MExchangeCore is
         uint256 orderEpoch                    // Orders with specified makerAddress and senderAddress with a salt less than this value are considered cancelled.
     );
 
+    /// @dev Fills the input order.
+    /// @param order Order struct containing order specifications.
+    /// @param takerAssetFillAmount Desired amount of takerAsset to sell.
+    /// @param signature Proof that order has been created by maker.
+    /// @return Amounts filled and fees paid by maker and taker.
+    function fillOrderInternal(
+        LibOrder.Order memory order,
+        uint256 takerAssetFillAmount,
+        bytes memory signature
+    )
+        internal
+        returns (LibFillResults.FillResults memory fillResults);
+
     /// @dev Updates state with results of a fill order.
     /// @param order that was filled.
     /// @param takerAddress Address of taker who filled the order.
@@ -83,21 +96,33 @@ contract MExchangeCore is
         bytes32 orderHash
     )
         internal;
-
+    
     /// @dev Validates context for fillOrder. Succeeds or throws.
     /// @param order to be filled.
-    /// @param orderInfo Status, orderHash, and amount already filled of order.
+    /// @param orderInfo OrderStatus, orderHash, and amount already filled of order.
     /// @param takerAddress Address of order taker.
+    /// @param signature Proof that the orders was created by its maker.
+    function assertFillableOrder(
+        LibOrder.Order memory order,
+        LibOrder.OrderInfo memory orderInfo,
+        address takerAddress,
+        bytes memory signature
+    )
+        internal
+        view;
+    
+    /// @dev Validates context for fillOrder. Succeeds or throws.
+    /// @param order to be filled.
+    /// @param orderInfo Status, orderHash, and amount already filled of order.
     /// @param takerAssetFillAmount Desired amount of order to fill by taker.
     /// @param takerAssetFilledAmount Amount of takerAsset that will be filled.
-    /// @param signature Proof that the orders was created by its maker.
+    /// @param makerAssetFilledAmount Amount of makerAsset that will be transfered.
     function assertValidFill(
         LibOrder.Order memory order,
         LibOrder.OrderInfo memory orderInfo,
-        address takerAddress,
         uint256 takerAssetFillAmount,
         uint256 takerAssetFilledAmount,
-        bytes memory signature
+        uint256 makerAssetFilledAmount
     )
         internal
         view;