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Diffstat (limited to 'contracts/extensions/contracts/src/BalanceThresholdFilter/mixins/MExchangeCalldata.sol')
-rw-r--r-- | contracts/extensions/contracts/src/BalanceThresholdFilter/mixins/MExchangeCalldata.sol | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/contracts/extensions/contracts/src/BalanceThresholdFilter/mixins/MExchangeCalldata.sol b/contracts/extensions/contracts/src/BalanceThresholdFilter/mixins/MExchangeCalldata.sol new file mode 100644 index 000000000..40536d820 --- /dev/null +++ b/contracts/extensions/contracts/src/BalanceThresholdFilter/mixins/MExchangeCalldata.sol @@ -0,0 +1,56 @@ + + /* + + 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/LICENSE2.0 + + 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 MExchangeCalldata { + + /// @dev Emulates the `calldataload` opcode on the embedded Exchange calldata, + /// which is accessed through `signedExchangeTransaction`. + /// @param offset Offset into the Exchange calldata. + /// @return value Corresponding 32 byte value stored at `offset`. + function exchangeCalldataload(uint256 offset) + internal pure + returns (bytes32 value); + + /// @dev Convenience function that skips the 4 byte selector when loading + /// from the embedded Exchange calldata. + /// @param offset Offset into the Exchange calldata (minus the 4 byte selector) + /// @return value Corresponding 32 byte value stored at `offset` + 4. + function loadExchangeData(uint256 offset) + internal pure + returns (bytes32 value); + + /// @dev Extracts the maker address from an order stored in the Exchange calldata + /// (which is embedded in `signedExchangeTransaction`). + /// @param orderParamIndex Index of the order in the Exchange function's signature. + /// @return makerAddress The extracted maker address. + function loadMakerAddressFromOrder(uint256 orderParamIndex) + internal pure + returns (address makerAddress); + + /// @dev Extracts the maker addresses from an array of orders stored in the Exchange calldata + /// (which is embedded in `signedExchangeTransaction`). + /// @param orderArrayParamIndex Index of the order array in the Exchange function's signature + /// @return makerAddresses The extracted maker addresses. + function loadMakerAddressesFromOrderArray(uint256 orderArrayParamIndex) + internal pure + returns (address[] makerAddresses); +} |