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Diffstat (limited to 'packages/contracts/src/2.0.0/forwarder/MixinMarketBuyTokens.sol')
-rw-r--r-- | packages/contracts/src/2.0.0/forwarder/MixinMarketBuyTokens.sol | 259 |
1 files changed, 0 insertions, 259 deletions
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinMarketBuyTokens.sol b/packages/contracts/src/2.0.0/forwarder/MixinMarketBuyTokens.sol deleted file mode 100644 index 165fec61f..000000000 --- a/packages/contracts/src/2.0.0/forwarder/MixinMarketBuyTokens.sol +++ /dev/null @@ -1,259 +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; -pragma experimental ABIEncoderV2; - -import "../utils/LibBytes/LibBytes.sol"; -import "./MixinWethFees.sol"; -import "./MixinMarketBuyZrx.sol"; -import "./MixinExpectedResults.sol"; -import "./MixinERC20.sol"; -import "./MixinERC721.sol"; -import "./MixinConstants.sol"; -import "../protocol/Exchange/libs/LibOrder.sol"; - - -contract MixinMarketBuyTokens is - MixinConstants, - MixinWethFees, - MixinMarketBuyZrx, - MixinExpectedResults, - MixinERC20, - MixinERC721 -{ - bytes4 public constant ERC20_DATA_ID = bytes4(keccak256("ERC20Token(address)")); - bytes4 public constant ERC721_DATA_ID = bytes4(keccak256("ERC721Token(address,uint256,bytes)")); - - /// @dev Buys the exact amount of assets (ERC20 and ERC721), performing fee abstraction if required. - /// All order assets must be of the same type. Deducts a proportional fee to fee recipient. - /// This function is payable and will convert all incoming ETH into WETH and perform the trade on behalf of the caller. - /// The caller is sent all assets from the fill of orders. This function will revert unless the requested amount of assets are purchased. - /// Any excess ETH sent will be returned to the caller - /// @param orders An array of Order struct containing order specifications. - /// @param signatures An array of Proof that order has been created by maker. - /// @param feeOrders An array of Order struct containing order specifications for fees. - /// @param makerTokenFillAmount The amount of maker asset to buy. - /// @param feeSignatures An array of Proof that order has been created by maker for the fee orders. - /// @param feeProportion A proportion deducted off the ETH spent and sent to feeRecipient. The maximum value for this - /// is 1000, aka 10%. Supports up to 2 decimal places. I.e 0.59% is 59. - /// @param feeRecipient An address of the fee recipient whom receives feeProportion of ETH. - /// @return FillResults amounts filled and fees paid by maker and taker. - function marketBuyTokensWithEth( - LibOrder.Order[] memory orders, - bytes[] memory signatures, - LibOrder.Order[] memory feeOrders, - bytes[] memory feeSignatures, - uint256 makerTokenFillAmount, - uint16 feeProportion, - address feeRecipient - ) - public - payable - returns (FillResults memory totalFillResults) - { - uint256 takerEthAmount = msg.value; - require( - takerEthAmount > 0, - "VALUE_GREATER_THAN_ZERO" - ); - require( - makerTokenFillAmount > 0, - "VALUE_GREATER_THAN_ZERO" - ); - bytes4 assetDataId = LibBytes.readBytes4(orders[0].makerAssetData, 0); - require( - assetDataId == ERC20_DATA_ID || assetDataId == ERC721_DATA_ID, - "UNSUPPORTED_TOKEN_PROXY" - ); - - ETHER_TOKEN.deposit.value(takerEthAmount)(); - if (assetDataId == ERC20_DATA_ID) { - totalFillResults = marketBuyERC20TokensInternal( - orders, - signatures, - feeOrders, - feeSignatures, - makerTokenFillAmount - ); - } else if (assetDataId == ERC721_DATA_ID) { - totalFillResults = batchBuyERC721TokensInternal( - orders, - signatures, - feeOrders, - feeSignatures - ); - } - // Prevent accidental WETH owned by this contract and it being spent - require( - takerEthAmount >= totalFillResults.takerAssetFilledAmount, - "INVALID_MSG_VALUE" - ); - withdrawPayAndDeductEthFee( - safeSub(takerEthAmount, totalFillResults.takerAssetFilledAmount), - totalFillResults.takerAssetFilledAmount, - feeProportion, - feeRecipient - ); - return totalFillResults; - } - - /// @dev Buys an exact amount of an ERC20 token using WETH. - /// @param orders Orders to fill. The maker asset is the ERC20 token to buy. The taker asset is WETH. - /// @param signatures Proof that the orders were created by their respective makers. - /// @param feeOrders to fill. The maker asset is ZRX and the taker asset is WETH. - /// @param feeSignatures Proof that the feeOrders were created by their respective makers. - /// @param makerTokenFillAmount Amount of the ERC20 token to buy. - /// @return totalFillResults Aggregated fill results of buying the ERC20 and ZRX tokens. - function marketBuyERC20TokensInternal( - LibOrder.Order[] memory orders, - bytes[] memory signatures, - LibOrder.Order[] memory feeOrders, - bytes[] memory feeSignatures, - uint256 makerTokenFillAmount - ) - private - returns (FillResults memory totalFillResults) - { - // We read the maker token address to check if it is ZRX and later use it for transfer - address makerTokenAddress = LibBytes.readAddress(orders[0].makerAssetData, 16); - // We assume that asset being bought by taker is the same for each order. - // Rather than passing this in as calldata, we copy the makerAssetData from the first order onto all later orders. - orders[0].takerAssetData = WETH_ASSET_DATA; - // We can short cut here for effeciency and use buyFeeTokensInternal if maker asset token is ZRX - // this buys us exactly that amount taking into account the fees. This saves gas and calculates the rate correctly - FillResults memory marketBuyResults; - if (makerTokenAddress == address(ZRX_TOKEN)) { - marketBuyResults = marketBuyZrxInternal( - orders, - signatures, - makerTokenFillAmount - ); - // When buying ZRX we round up which can result in a small margin excess - require( - marketBuyResults.makerAssetFilledAmount >= makerTokenFillAmount, - "UNACCEPTABLE_THRESHOLD" - ); - addFillResults(totalFillResults, marketBuyResults); - require( - isAcceptableThreshold( - safeAdd(totalFillResults.makerAssetFilledAmount, totalFillResults.takerFeePaid), // Total ZRX - totalFillResults.makerAssetFilledAmount // amount going to msg.sender - ), - "UNACCEPTABLE_THRESHOLD" - ); - } else { - FillResults memory calculatedMarketBuyResults = calculateMarketBuyResults(orders, makerTokenFillAmount); - if (calculatedMarketBuyResults.takerFeePaid > 0) { - // Fees are required for these orders. Buy enough ZRX to cover the future market buy - FillResults memory zrxMarketBuyResults = marketBuyZrxInternal( - feeOrders, - feeSignatures, - calculatedMarketBuyResults.takerFeePaid - ); - totalFillResults.takerAssetFilledAmount = zrxMarketBuyResults.takerAssetFilledAmount; - totalFillResults.takerFeePaid = zrxMarketBuyResults.takerFeePaid; - } - // Make our market buy of the requested tokens with the remaining balance - marketBuyResults = EXCHANGE.marketBuyOrders( - orders, - makerTokenFillAmount, - signatures - ); - require( - marketBuyResults.makerAssetFilledAmount == makerTokenFillAmount, - "UNACCEPTABLE_THRESHOLD" - ); - addFillResults(totalFillResults, marketBuyResults); - require( - isAcceptableThreshold( - totalFillResults.takerAssetFilledAmount, - marketBuyResults.takerAssetFilledAmount - ), - "UNACCEPTABLE_THRESHOLD" - ); - } - // Transfer all purchased tokens to msg.sender - transferToken( - makerTokenAddress, - msg.sender, - marketBuyResults.makerAssetFilledAmount - ); - return totalFillResults; - } - - /// @dev Buys an all of the ERC721 tokens in the orders. - /// @param orders Orders to fill. The maker asset is the ERC721 token to buy. The taker asset is WETH. - /// @param signatures Proof that the orders were created by their respective makers. - /// @param feeOrders to fill. The maker asset is ZRX and the taker asset is WETH. - /// @param feeSignatures Proof that the feeOrders were created by their respective makers. - /// @return totalFillResults Aggregated fill results of buying the ERC721 tokens and ZRX tokens. - function batchBuyERC721TokensInternal( - LibOrder.Order[] memory orders, - bytes[] memory signatures, - LibOrder.Order[] memory feeOrders, - bytes[] memory feeSignatures - ) - private - returns (FillResults memory totalFillResults) - { - uint256 totalZrxFeeAmount; - uint256 ordersLength = orders.length; - uint256[] memory takerAssetFillAmounts = new uint256[](ordersLength); - for (uint256 i = 0; i < ordersLength; i++) { - // Total up the fees - totalZrxFeeAmount = safeAdd(totalZrxFeeAmount, orders[i].takerFee); - // We assume that asset being bought by taker is the same for each order. - // Rather than passing this in as calldata, we set the takerAssetData as WETH asset data - orders[i].takerAssetData = WETH_ASSET_DATA; - // Populate takerAssetFillAmounts for later batchFill - takerAssetFillAmounts[i] = orders[i].takerAssetAmount; - } - if (totalZrxFeeAmount > 0) { - // Fees are required for these orders. Buy enough ZRX to cover the future fill - FillResults memory zrxMarketBuyResults = marketBuyZrxInternal( - feeOrders, - feeSignatures, - totalZrxFeeAmount - ); - totalFillResults.takerFeePaid = zrxMarketBuyResults.takerFeePaid; - totalFillResults.takerAssetFilledAmount = zrxMarketBuyResults.takerAssetFilledAmount; - } - FillResults memory batchFillResults = EXCHANGE.batchFillOrKillOrders( - orders, - takerAssetFillAmounts, - signatures - ); - addFillResults(totalFillResults, batchFillResults); - require( - isAcceptableThreshold( - totalFillResults.takerAssetFilledAmount, - batchFillResults.takerAssetFilledAmount - ), - "UNACCEPTABLE_THRESHOLD" - ); - // Transfer all of the tokens filled from the batchFill - for (i = 0; i < ordersLength; i++) { - transferERC721Token( - orders[i].makerAssetData, - msg.sender - ); - } - return totalFillResults; - } -} |