1 files changed, 54 insertions, 0 deletions
diff --git a/contracts/extensions/contracts/src/BalanceThresholdFilter/mixins/MBalanceThresholdFilterCore.sol b/contracts/extensions/contracts/src/BalanceThresholdFilter/mixins/MBalanceThresholdFilterCore.sol
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index 000000000..1c840136b
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+++ b/contracts/extensions/contracts/src/BalanceThresholdFilter/mixins/MBalanceThresholdFilterCore.sol
@@ -0,0 +1,54 @@
+/*
+
+  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;
+
+import "@0x/contracts-exchange/contracts/src/interfaces/IExchange.sol";
+import "../interfaces/IThresholdAsset.sol";
+import "../interfaces/IBalanceThresholdFilterCore.sol";
+
+
+contract MBalanceThresholdFilterCore is
+    IBalanceThresholdFilterCore
+{
+
+    // Points to 0x exchange contract
+    // solhint-disable var-name-mixedcase
+    IExchange internal EXCHANGE;
+
+    // The asset that must be held by makers/takers
+    IThresholdAsset internal THRESHOLD_ASSET;
+
+    // The minimum balance of `THRESHOLD_ASSET` that must be held by makers/takers
+    uint256 internal BALANCE_THRESHOLD;
+    // solhint-enable var-name-mixedcase
+
+    // Addresses that hold at least `BALANCE_THRESHOLD` of `THRESHOLD_ASSET`
+    event ValidatedAddresses (
+        address[] addresses
+    );
+
+    /// @dev Constructs an array of addresses to be validated.
+    ///      Addresses depend on which Exchange function is to be called
+    ///      (defined by `signedExchangeTransaction` above).
+    /// @param signerAddress Address of transaction signer.
+    /// @return addressesToValidate Array of addresses to validate.
+    function getAddressesToValidate(address signerAddress)
+        internal pure
+        returns (address[] memory addressesToValidate);
+}