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diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ITransactions.sol b/packages/contracts/src/2.0.0/protocol/Exchange/interfaces/ITransactions.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;
+
+contract ITransactions {
+
+ /// @dev Executes an exchange method call in the context of signer.
+ /// @param salt Arbitrary number to ensure uniqueness of transaction hash.
+ /// @param signerAddress Address of transaction signer.
+ /// @param data AbiV2 encoded calldata.
+ /// @param signature Proof of signer transaction by signer.
+ function executeTransaction(
+ uint256 salt,
+ address signerAddress,
+ bytes data,
+ bytes signature
+ )
+ external;
+}