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Diffstat (limited to 'packages/contracts/src/2.0.0/forwarder/MixinMarketSellTokens.sol')
| -rw-r--r-- | packages/contracts/src/2.0.0/forwarder/MixinMarketSellTokens.sol | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinMarketSellTokens.sol b/packages/contracts/src/2.0.0/forwarder/MixinMarketSellTokens.sol deleted file mode 100644 index 8c9cdb8d5..000000000 --- a/packages/contracts/src/2.0.0/forwarder/MixinMarketSellTokens.sol +++ /dev/null @@ -1,196 +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 "../protocol/Exchange/libs/LibOrder.sol"; -import "../utils/LibBytes/LibBytes.sol"; -import "./MixinWethFees.sol"; -import "./MixinExpectedResults.sol"; -import "./MixinERC20.sol"; -import "./MixinConstants.sol"; -import "./MixinMarketBuyZrx.sol"; - -contract MixinMarketSellTokens is - MixinConstants, - MixinWethFees, - MixinMarketBuyZrx, - MixinExpectedResults, - MixinERC20 -{ - /// @dev Market sells ETH for ERC20 tokens, performing fee abstraction if required. This does not support ERC721 tokens. This function is payable - /// and will convert all incoming ETH into WETH and perform the trade on behalf of the caller. - /// This function allows for a deduction of a proportion of incoming ETH sent to the feeRecipient. - /// The caller is sent all tokens from the operation. - /// If the purchased token amount does not meet an acceptable threshold then this function reverts. - /// @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 feeSignatures An array of Proof that order has been created by maker for the fee orders. - /// @param feeProportion A proportion deducted off the incoming ETH 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 marketSellEthForERC20( - LibOrder.Order[] memory orders, - bytes[] memory signatures, - LibOrder.Order[] memory feeOrders, - bytes[] memory feeSignatures, - uint16 feeProportion, - address feeRecipient - ) - payable - public - returns (FillResults memory totalFillResults) - { - uint256 takerEthAmount = msg.value; - require( - takerEthAmount > 0, - "VALUE_GREATER_THAN_ZERO" - ); - // Deduct the fee from the total amount of ETH sent in - uint256 ethFeeAmount = payEthFee( - takerEthAmount, - feeProportion, - feeRecipient - ); - uint256 wethSellAmount = safeSub(takerEthAmount, ethFeeAmount); - - // Deposit the remaining to be used for trading - ETHER_TOKEN.deposit.value(wethSellAmount)(); - // Populate the known assetData, as it is always WETH the caller can provide null bytes to save gas - // marketSellOrders fills the remaining - address makerTokenAddress = LibBytes.readAddress(orders[0].makerAssetData, 16); - orders[0].takerAssetData = WETH_ASSET_DATA; - if (makerTokenAddress == address(ZRX_TOKEN)) { - // If this is ZRX then we market sell from the orders, rather than a 2 step of buying ZRX fees from feeOrders - // then buying ZRX from orders - totalFillResults = marketSellEthForZRXInternal( - orders, - signatures, - wethSellAmount - ); - } else { - totalFillResults = marketSellEthForERC20Internal( - orders, - signatures, - feeOrders, - feeSignatures, - wethSellAmount - ); - } - // Prevent accidental WETH owned by this contract and it being spent - require( - takerEthAmount >= totalFillResults.takerAssetFilledAmount, - "INVALID_MSG_VALUE" - ); - // Ensure no WETH is left in this contract - require( - wethSellAmount == totalFillResults.takerAssetFilledAmount, - "UNACCEPTABLE_THRESHOLD" - ); - // Transfer all tokens to msg.sender - transferToken( - makerTokenAddress, - msg.sender, - totalFillResults.makerAssetFilledAmount - ); - return totalFillResults; - } - - /// @dev Market sells WETH for ERC20 tokens. - /// @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 feeSignatures An array of Proof that order has been created by maker for the fee orders. - /// @param wethSellAmount The amount of WETH to sell. - /// @return FillResults amounts filled and fees paid by maker and taker. - function marketSellEthForERC20Internal( - LibOrder.Order[] memory orders, - bytes[] memory signatures, - LibOrder.Order[] memory feeOrders, - bytes[] memory feeSignatures, - uint256 wethSellAmount - ) - internal - returns (FillResults memory totalFillResults) - { - uint256 remainingWethSellAmount = wethSellAmount; - FillResults memory calculatedMarketSellResults = calculateMarketSellResults(orders, wethSellAmount); - if (calculatedMarketSellResults.takerFeePaid > 0) { - // Fees are required for these orders. Buy enough ZRX to cover the future market buy - FillResults memory feeTokensResults = marketBuyZrxInternal( - feeOrders, - feeSignatures, - calculatedMarketSellResults.takerFeePaid - ); - // Ensure the token abstraction was fair if fees were proportionally too high, we fail - require( - isAcceptableThreshold( - wethSellAmount, - safeSub(wethSellAmount, feeTokensResults.takerAssetFilledAmount) - ), - "UNACCEPTABLE_THRESHOLD" - ); - remainingWethSellAmount = safeSub(remainingWethSellAmount, feeTokensResults.takerAssetFilledAmount); - totalFillResults.takerFeePaid = feeTokensResults.takerFeePaid; - totalFillResults.takerAssetFilledAmount = feeTokensResults.takerAssetFilledAmount; - } - // Make our market sell to buy the requested tokens with the remaining balance - FillResults memory requestedTokensResults = EXCHANGE.marketSellOrders( - orders, - remainingWethSellAmount, - signatures - ); - // Update our return FillResult with the market sell - addFillResults(totalFillResults, requestedTokensResults); - return totalFillResults; - } - - /// @dev Market sells WETH for ZRX tokens. - /// @param orders An array of Order struct containing order specifications. - /// @param signatures An array of Proof that order has been created by maker. - /// @param wethSellAmount The amount of WETH to sell. - /// @return FillResults amounts filled and fees paid by maker and taker. - function marketSellEthForZRXInternal( - LibOrder.Order[] memory orders, - bytes[] memory signatures, - uint256 wethSellAmount - ) - internal - returns (FillResults memory totalFillResults) - { - // Make our market sell to buy the requested tokens with the remaining balance - totalFillResults = EXCHANGE.marketSellOrders( - orders, - wethSellAmount, - signatures - ); - // Exchange does not special case ZRX in the makerAssetFilledAmount, if fees were deducted then using this amount - // for future transfers is invalid. - uint256 zrxAmountBought = safeSub(totalFillResults.makerAssetFilledAmount, totalFillResults.takerFeePaid); - require( - isAcceptableThreshold(totalFillResults.makerAssetFilledAmount, zrxAmountBought), - "UNACCEPTABLE_THRESHOLD" - ); - totalFillResults.makerAssetFilledAmount = zrxAmountBought; - return totalFillResults; - } - -} |