From 814518dd8094d03908d77e39faa21b8758f1552b Mon Sep 17 00:00:00 2001 From: Amir Bandeali Date: Mon, 9 Jul 2018 21:09:45 -0700 Subject: Refactor forwarding contract architecture, remove batch functions --- .../src/2.0.0/forwarder/MixinExpectedResults.sol | 161 --------------------- 1 file changed, 161 deletions(-) delete mode 100644 packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol (limited to 'packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol') diff --git a/packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol b/packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol deleted file mode 100644 index a575c9675..000000000 --- a/packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol +++ /dev/null @@ -1,161 +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 "../protocol/Exchange/libs/LibFillResults.sol"; -import "../protocol/Exchange/libs/LibMath.sol"; -import "../protocol/Exchange/libs/LibOrder.sol"; -import "./mixins/MConstants.sol"; -import "./mixins/MExpectedResults.sol"; - - -contract MixinExpectedResults is - LibMath, - LibFillResults, - MConstants, - MExpectedResults -{ - - /// @dev Calculates a total FillResults for buying makerAssetFillAmount over all orders. - /// Including the fees required to be paid. - /// @param orders An array of Order struct containing order specifications. - /// @param makerAssetFillAmount A number representing the amount of this order to fill. - /// @return totalFillResults Amounts filled and fees paid by maker and taker. - function calculateMarketBuyResults( - LibOrder.Order[] memory orders, - uint256 makerAssetFillAmount - ) - public - view - returns (FillResults memory totalFillResults) - { - for (uint256 i = 0; i < orders.length; i++) { - uint256 remainingMakerAssetFillAmount = safeSub(makerAssetFillAmount, totalFillResults.makerAssetFilledAmount); - uint256 remainingTakerAssetFillAmount = getPartialAmount( - orders[i].takerAssetAmount, - orders[i].makerAssetAmount, - remainingMakerAssetFillAmount - ); - FillResults memory singleFillResult = calculateFillResults(orders[i], remainingTakerAssetFillAmount); - addFillResults(totalFillResults, singleFillResult); - if (totalFillResults.makerAssetFilledAmount == makerAssetFillAmount) { - break; - } - } - return totalFillResults; - } - - /// @dev Calculates a FillResults total for selling takerAssetFillAmount over all orders. - /// Including the fees required to be paid. - /// @param orders An array of Order struct containing order specifications. - /// @param takerAssetFillAmount A number representing the amount of this order to fill. - /// @return totalFillResults Amounts filled and fees paid by maker and taker. - function calculateMarketSellResults( - LibOrder.Order[] memory orders, - uint256 takerAssetFillAmount - ) - public - view - returns (FillResults memory totalFillResults) - { - for (uint256 i = 0; i < orders.length; i++) { - uint256 remainingTakerAssetFillAmount = safeSub(takerAssetFillAmount, totalFillResults.takerAssetFilledAmount); - FillResults memory singleFillResult = calculateFillResults(orders[i], remainingTakerAssetFillAmount); - addFillResults(totalFillResults, singleFillResult); - if (totalFillResults.takerAssetFilledAmount == takerAssetFillAmount) { - break; - } - } - return totalFillResults; - } - - /// @dev Calculates fill results for buyFeeTokens. This handles fees on buying ZRX - /// so the end result is the expected amount of ZRX (not less after fees). - /// @param orders An array of Order struct containing order specifications. - /// @param zrxFillAmount A number representing the amount zrx to buy - /// @return totalFillResults Expected fill result amounts from buying fees - function calculateMarketBuyZrxResults( - LibOrder.Order[] memory orders, - uint256 zrxFillAmount - ) - public - view - returns (FillResults memory totalFillResults) - { - for (uint256 i = 0; i < orders.length; i++) { - uint256 remainingZrxFillAmount = safeSub(zrxFillAmount, totalFillResults.makerAssetFilledAmount); - // Convert the remaining amount of makerToken to buy into remaining amount - // of takerToken to sell, assuming entire amount can be sold in the current order - uint256 remainingWethSellAmount = getPartialAmount( - orders[i].takerAssetAmount, - safeSub(orders[i].makerAssetAmount, orders[i].takerFee), // our exchange rate after fees - remainingZrxFillAmount - ); - FillResults memory singleFillResult = calculateFillResults(orders[i], safeAdd(remainingWethSellAmount, 1)); - - singleFillResult.makerAssetFilledAmount = safeSub(singleFillResult.makerAssetFilledAmount, singleFillResult.takerFeePaid); - addFillResults(totalFillResults, singleFillResult); - // As we compensate for the rounding issue above have slightly more ZRX than the requested zrxFillAmount - if (totalFillResults.makerAssetFilledAmount >= zrxFillAmount) { - break; - } - } - return totalFillResults; - } - - /// @dev Simulates the 0x Exchange fillOrder validation and calculations, without performing any state changes. - /// @param order An Order struct containing order specifications. - /// @param takerAssetFillAmount A number representing the amount of this order to fill. - /// @return fillResults Amounts filled and fees paid by maker and taker. - function calculateFillResults( - LibOrder.Order memory order, - uint256 takerAssetFillAmount - ) - internal - view - returns (FillResults memory fillResults) - { - LibOrder.OrderInfo memory orderInfo = EXCHANGE.getOrderInfo(order); - if (orderInfo.orderStatus != uint8(LibOrder.OrderStatus.FILLABLE)) { - return fillResults; - } - uint256 remainingTakerAssetAmount = safeSub(order.takerAssetAmount, orderInfo.orderTakerAssetFilledAmount); - uint256 takerAssetFilledAmount = min256(takerAssetFillAmount, remainingTakerAssetAmount); - - fillResults.takerAssetFilledAmount = takerAssetFilledAmount; - fillResults.makerAssetFilledAmount = getPartialAmount( - takerAssetFilledAmount, - order.takerAssetAmount, - order.makerAssetAmount - ); - fillResults.makerFeePaid = getPartialAmount( - takerAssetFilledAmount, - order.takerAssetAmount, - order.makerFee - ); - fillResults.takerFeePaid = getPartialAmount( - takerAssetFilledAmount, - order.takerAssetAmount, - order.takerFee - ); - return fillResults; - } -} -- cgit v1.2.3