diff options
Diffstat (limited to 'contracts/extensions/contracts/OrderMatcher/MixinAssets.sol')
| -rw-r--r-- | contracts/extensions/contracts/OrderMatcher/MixinAssets.sol | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/contracts/extensions/contracts/OrderMatcher/MixinAssets.sol b/contracts/extensions/contracts/OrderMatcher/MixinAssets.sol deleted file mode 100644 index f0f91cfc0..000000000 --- a/contracts/extensions/contracts/OrderMatcher/MixinAssets.sol +++ /dev/null @@ -1,195 +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 "@0x/contracts-utils/contracts/utils/LibBytes/LibBytes.sol"; -import "@0x/contracts-utils/contracts/utils/Ownable/Ownable.sol"; -import "@0x/contracts-tokens/contracts/tokens/ERC20Token/IERC20Token.sol"; -import "@0x/contracts-tokens/contracts/tokens/ERC721Token/IERC721Token.sol"; -import "./mixins/MAssets.sol"; -import "./libs/LibConstants.sol"; - - -contract MixinAssets is - MAssets, - Ownable, - LibConstants -{ - using LibBytes for bytes; - - /// @dev Withdraws assets from this contract. The contract requires a ZRX balance in order to - /// function optimally, and this function allows the ZRX to be withdrawn by owner. It may also be - /// used to withdraw assets that were accidentally sent to this contract. - /// @param assetData Byte array encoded for the respective asset proxy. - /// @param amount Amount of asset to withdraw. - function withdrawAsset( - bytes assetData, - uint256 amount - ) - external - onlyOwner - { - transferAssetToSender(assetData, amount); - } - - /// @dev Approves or disapproves an AssetProxy to spend asset. - /// @param assetData Byte array encoded for the respective asset proxy. - /// @param amount Amount of asset to approve for respective proxy. - function approveAssetProxy( - bytes assetData, - uint256 amount - ) - external - onlyOwner - { - bytes4 proxyId = assetData.readBytes4(0); - - if (proxyId == ERC20_DATA_ID) { - approveERC20Token(assetData, amount); - } else if (proxyId == ERC721_DATA_ID) { - approveERC721Token(assetData, amount); - } else { - revert("UNSUPPORTED_ASSET_PROXY"); - } - } - - /// @dev Transfers given amount of asset to sender. - /// @param assetData Byte array encoded for the respective asset proxy. - /// @param amount Amount of asset to transfer to sender. - function transferAssetToSender( - bytes memory assetData, - uint256 amount - ) - internal - { - bytes4 proxyId = assetData.readBytes4(0); - - if (proxyId == ERC20_DATA_ID) { - transferERC20Token(assetData, amount); - } else if (proxyId == ERC721_DATA_ID) { - transferERC721Token(assetData, amount); - } else { - revert("UNSUPPORTED_ASSET_PROXY"); - } - } - - /// @dev Decodes ERC20 assetData and transfers given amount to sender. - /// @param assetData Byte array encoded for the respective asset proxy. - /// @param amount Amount of asset to transfer to sender. - function transferERC20Token( - bytes memory assetData, - uint256 amount - ) - internal - { - // 4 byte id + 12 0 bytes before ABI encoded token address. - address token = assetData.readAddress(16); - - // Transfer tokens. - // We do a raw call so we can check the success separate - // from the return data. - bool success = token.call(abi.encodeWithSelector( - ERC20_TRANSFER_SELECTOR, - msg.sender, - amount - )); - require( - success, - "TRANSFER_FAILED" - ); - - // Check return data. - // If there is no return data, we assume the token incorrectly - // does not return a bool. In this case we expect it to revert - // on failure, which was handled above. - // If the token does return data, we require that it is a single - // value that evaluates to true. - assembly { - if returndatasize { - success := 0 - if eq(returndatasize, 32) { - // First 64 bytes of memory are reserved scratch space - returndatacopy(0, 0, 32) - success := mload(0) - } - } - } - require( - success, - "TRANSFER_FAILED" - ); - } - - /// @dev Decodes ERC721 assetData and transfers given amount to sender. - /// @param assetData Byte array encoded for the respective asset proxy. - /// @param amount Amount of asset to transfer to sender. - function transferERC721Token( - bytes memory assetData, - uint256 amount - ) - internal - { - require( - amount == 1, - "INVALID_AMOUNT" - ); - // Decode asset data. - // 4 byte id + 12 0 bytes before ABI encoded token address. - address token = assetData.readAddress(16); - // 4 byte id + 32 byte ABI encoded token address before token id. - uint256 tokenId = assetData.readUint256(36); - - // Perform transfer. - IERC721Token(token).transferFrom( - address(this), - msg.sender, - tokenId - ); - } - - /// @dev Sets approval for ERC20 AssetProxy. - /// @param assetData Byte array encoded for the respective asset proxy. - /// @param amount Amount of asset to approve for respective proxy. - function approveERC20Token( - bytes memory assetData, - uint256 amount - ) - internal - { - address token = assetData.readAddress(16); - require( - IERC20Token(token).approve(ERC20_PROXY_ADDRESS, amount), - "APPROVAL_FAILED" - ); - } - - /// @dev Sets approval for ERC721 AssetProxy. - /// @param assetData Byte array encoded for the respective asset proxy. - /// @param amount Amount of asset to approve for respective proxy. - function approveERC721Token( - bytes memory assetData, - uint256 amount - ) - internal - { - address token = assetData.readAddress(16); - bool approval = amount >= 1; - IERC721Token(token).setApprovalForAll(ERC721_PROXY_ADDRESS, approval); - } -} |