diff options
Diffstat (limited to 'packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol')
-rw-r--r-- | packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol | 127 |
1 files changed, 64 insertions, 63 deletions
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol b/packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol index 0bca7dc80..6406d1d37 100644 --- a/packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol +++ b/packages/contracts/src/2.0.0/forwarder/MixinExpectedResults.sol @@ -16,7 +16,7 @@ */ -pragma solidity ^0.4.24; +pragma solidity 0.4.24; pragma experimental ABIEncoderV2; import "../utils/LibBytes/LibBytes.sol"; @@ -25,74 +25,13 @@ import "../protocol/Exchange/libs/LibMath.sol"; import "../protocol/Exchange/libs/LibOrder.sol"; import "./MixinConstants.sol"; + contract MixinExpectedResults is LibMath, LibFillResults, MixinConstants { - /// @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; - } - - /// @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 - ) - internal - 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 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. @@ -155,4 +94,66 @@ contract MixinExpectedResults is } 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; + } + + /// @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 + ) + internal + 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; + } } |