diff options
author | Alex Browne <stephenalexbrowne@gmail.com> | 2018-10-02 07:44:13 +0800 |
---|---|---|
committer | Alex Browne <stephenalexbrowne@gmail.com> | 2018-10-16 04:36:09 +0800 |
commit | 81c48872415998e53ad653aabf183e18257ec327 (patch) | |
tree | 47e73fbdf817941414fa06035d5e568ee7d34ddb /packages/contracts/src/2.0.0/protocol/Exchange/MixinTransactions.sol | |
parent | 83a36aff3fa750560cf6dd6b08b84a5915ea4c5d (diff) | |
download | dexon-sol-tools-81c48872415998e53ad653aabf183e18257ec327.tar dexon-sol-tools-81c48872415998e53ad653aabf183e18257ec327.tar.gz dexon-sol-tools-81c48872415998e53ad653aabf183e18257ec327.tar.bz2 dexon-sol-tools-81c48872415998e53ad653aabf183e18257ec327.tar.lz dexon-sol-tools-81c48872415998e53ad653aabf183e18257ec327.tar.xz dexon-sol-tools-81c48872415998e53ad653aabf183e18257ec327.tar.zst dexon-sol-tools-81c48872415998e53ad653aabf183e18257ec327.zip |
Move generated contract wrappers and artifacts into contracts package
Diffstat (limited to 'packages/contracts/src/2.0.0/protocol/Exchange/MixinTransactions.sol')
-rw-r--r-- | packages/contracts/src/2.0.0/protocol/Exchange/MixinTransactions.sol | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/packages/contracts/src/2.0.0/protocol/Exchange/MixinTransactions.sol b/packages/contracts/src/2.0.0/protocol/Exchange/MixinTransactions.sol deleted file mode 100644 index 3a76ca202..000000000 --- a/packages/contracts/src/2.0.0/protocol/Exchange/MixinTransactions.sol +++ /dev/null @@ -1,152 +0,0 @@ -/* - - 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 "./libs/LibExchangeErrors.sol"; -import "./mixins/MSignatureValidator.sol"; -import "./mixins/MTransactions.sol"; -import "./libs/LibEIP712.sol"; - - -contract MixinTransactions is - LibEIP712, - MSignatureValidator, - MTransactions -{ - // Mapping of transaction hash => executed - // This prevents transactions from being executed more than once. - mapping (bytes32 => bool) public transactions; - - // Address of current transaction signer - address public currentContextAddress; - - /// @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 - { - // Prevent reentrancy - require( - currentContextAddress == address(0), - "REENTRANCY_ILLEGAL" - ); - - bytes32 transactionHash = hashEIP712Message(hashZeroExTransaction( - salt, - signerAddress, - data - )); - - // Validate transaction has not been executed - require( - !transactions[transactionHash], - "INVALID_TX_HASH" - ); - - // Transaction always valid if signer is sender of transaction - if (signerAddress != msg.sender) { - // Validate signature - require( - isValidSignature( - transactionHash, - signerAddress, - signature - ), - "INVALID_TX_SIGNATURE" - ); - - // Set the current transaction signer - currentContextAddress = signerAddress; - } - - // Execute transaction - transactions[transactionHash] = true; - require( - address(this).delegatecall(data), - "FAILED_EXECUTION" - ); - - // Reset current transaction signer if it was previously updated - if (signerAddress != msg.sender) { - currentContextAddress = address(0); - } - } - - /// @dev Calculates EIP712 hash of the Transaction. - /// @param salt Arbitrary number to ensure uniqueness of transaction hash. - /// @param signerAddress Address of transaction signer. - /// @param data AbiV2 encoded calldata. - /// @return EIP712 hash of the Transaction. - function hashZeroExTransaction( - uint256 salt, - address signerAddress, - bytes memory data - ) - internal - pure - returns (bytes32 result) - { - bytes32 schemaHash = EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH; - bytes32 dataHash = keccak256(data); - - // Assembly for more efficiently computing: - // keccak256(abi.encodePacked( - // EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH, - // salt, - // bytes32(signerAddress), - // keccak256(data) - // )); - - assembly { - // Load free memory pointer - let memPtr := mload(64) - - mstore(memPtr, schemaHash) // hash of schema - mstore(add(memPtr, 32), salt) // salt - mstore(add(memPtr, 64), and(signerAddress, 0xffffffffffffffffffffffffffffffffffffffff)) // signerAddress - mstore(add(memPtr, 96), dataHash) // hash of data - - // Compute hash - result := keccak256(memPtr, 128) - } - return result; - } - - /// @dev The current function will be called in the context of this address (either 0x transaction signer or `msg.sender`). - /// If calling a fill function, this address will represent the taker. - /// If calling a cancel function, this address will represent the maker. - /// @return Signer of 0x transaction if entry point is `executeTransaction`. - /// `msg.sender` if entry point is any other function. - function getCurrentContextAddress() - internal - view - returns (address) - { - address currentContextAddress_ = currentContextAddress; - address contextAddress = currentContextAddress_ == address(0) ? msg.sender : currentContextAddress_; - return contextAddress; - } -} |