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-rw-r--r--packages/contracts/src/2.0.0/forwarder/MixinExchangeWrapper.sol16
-rw-r--r--packages/contracts/src/2.0.0/forwarder/MixinForwarderCore.sol53
-rw-r--r--packages/contracts/src/2.0.0/forwarder/MixinWeth.sol12
-rw-r--r--packages/contracts/src/2.0.0/forwarder/mixins/MExchangeWrapper.sol4
-rw-r--r--packages/contracts/src/2.0.0/forwarder/mixins/MForwarderCore.sol42
5 files changed, 29 insertions, 98 deletions
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinExchangeWrapper.sol b/packages/contracts/src/2.0.0/forwarder/MixinExchangeWrapper.sol
index f3aa483c5..4584bb840 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinExchangeWrapper.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinExchangeWrapper.sol
@@ -139,7 +139,7 @@ contract MixinExchangeWrapper is
/// @param makerAssetFillAmount Desired amount of makerAsset to buy.
/// @param signatures Proofs that orders have been signed by makers.
/// @return Amounts filled and fees paid by makers and taker.
- function marketBuyWithWeth(
+ function marketBuyExactAmountWithWeth(
LibOrder.Order[] memory orders,
uint256 makerAssetFillAmount,
bytes[] memory signatures
@@ -180,10 +180,16 @@ contract MixinExchangeWrapper is
addFillResults(totalFillResults, singleFillResults);
// Stop execution if the entire amount of makerAsset has been bought
- if (totalFillResults.makerAssetFilledAmount >= makerAssetFillAmount) {
+ uint256 makerAssetFilledAmount = totalFillResults.makerAssetFilledAmount;
+ if (makerAssetFilledAmount >= makerAssetFillAmount) {
break;
}
}
+
+ require(
+ makerAssetFilledAmount >= makerAssetFillAmount,
+ "COMPLETE_FILL_FAILED"
+ );
return totalFillResults;
}
@@ -196,7 +202,7 @@ contract MixinExchangeWrapper is
/// @param zrxBuyAmount Desired amount of ZRX to buy.
/// @param signatures Proofs that orders have been created by makers.
/// @return totalFillResults Amounts filled and fees paid by maker and taker.
- function marketBuyZrxWithWeth(
+ function marketBuyExactZrxWithWeth(
LibOrder.Order[] memory orders,
uint256 zrxBuyAmount,
bytes[] memory signatures
@@ -248,6 +254,10 @@ contract MixinExchangeWrapper is
}
}
+ require(
+ zrxPurchased >= zrxBuyAmount,
+ "COMPLETE_FILL_FAILED"
+ );
return totalFillResults;
}
}
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinForwarderCore.sol b/packages/contracts/src/2.0.0/forwarder/MixinForwarderCore.sol
index 1164ae919..0d313ea91 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinForwarderCore.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinForwarderCore.sol
@@ -23,7 +23,7 @@ import "./libs/LibConstants.sol";
import "./mixins/MWeth.sol";
import "./mixins/MAssets.sol";
import "./mixins/MExchangeWrapper.sol";
-import "./mixins/MForwarderCore.sol";
+import "./interfaces/IForwarderCore.sol";
import "../utils/LibBytes/LibBytes.sol";
import "../protocol/Exchange/libs/LibOrder.sol";
import "../protocol/Exchange/libs/LibFillResults.sol";
@@ -37,7 +37,7 @@ contract MixinForwarderCore is
MWeth,
MAssets,
MExchangeWrapper,
- MForwarderCore
+ IForwarderCore
{
using LibBytes for bytes;
@@ -117,7 +117,7 @@ contract MixinForwarderCore is
);
// Buy back all ZRX spent on fees.
zrxBuyAmount = orderFillResults.takerFeePaid;
- feeOrderFillResults = marketBuyZrxWithWeth(
+ feeOrderFillResults = marketBuyExactZrxWithWeth(
feeOrders,
zrxBuyAmount,
feeSignatures
@@ -125,13 +125,6 @@ contract MixinForwarderCore is
makerAssetAmountPurchased = orderFillResults.makerAssetFilledAmount;
}
- // Ensure that all ZRX fees have been repurchased and no extra WETH owned by this contract has been sold.
- assertValidFillResults(
- orderFillResults,
- feeOrderFillResults,
- zrxBuyAmount
- );
-
// Transfer feePercentage of total ETH spent on primary orders to feeRecipient.
// Refund remaining ETH to msg.sender.
transferEthFeeAndRefund(
@@ -180,7 +173,7 @@ contract MixinForwarderCore is
if (orders[0].makerAssetData.equals(ZRX_ASSET_DATA)) {
// If the makerAsset is ZRX, it is not necessary to pay fees out of this
// contracts's ZRX balance because fees are factored into the price of the order.
- orderFillResults = marketBuyZrxWithWeth(
+ orderFillResults = marketBuyExactZrxWithWeth(
orders,
makerAssetFillAmount,
signatures
@@ -190,14 +183,14 @@ contract MixinForwarderCore is
} else {
// Attemp to purchase desired amount of makerAsset.
// ZRX fees are payed with this contract's balance.
- orderFillResults = marketBuyWithWeth(
+ orderFillResults = marketBuyExactAmountWithWeth(
orders,
makerAssetFillAmount,
signatures
);
// Buy back all ZRX spent on fees.
zrxBuyAmount = orderFillResults.takerFeePaid;
- feeOrderFillResults = marketBuyZrxWithWeth(
+ feeOrderFillResults = marketBuyExactZrxWithWeth(
feeOrders,
zrxBuyAmount,
feeSignatures
@@ -205,13 +198,6 @@ contract MixinForwarderCore is
makerAssetAmountPurchased = orderFillResults.makerAssetFilledAmount;
}
- // Ensure that all ZRX fees have been repurchased and no extra WETH owned by this contract has been sold.
- assertValidFillResults(
- orderFillResults,
- feeOrderFillResults,
- zrxBuyAmount
- );
-
// Transfer feePercentage of total ETH spent on primary orders to feeRecipient.
// Refund remaining ETH to msg.sender.
transferEthFeeAndRefund(
@@ -224,31 +210,4 @@ contract MixinForwarderCore is
// Transfer purchased assets to msg.sender.
transferPurchasedAssetToSender(orders[0].makerAssetData, makerAssetAmountPurchased);
}
-
- /// @dev Ensures that all ZRX fees have been repurchased and no extra WETH owned by this contract has been sold.
- /// @param orderFillResults Amounts filled and fees paid for primary orders.
- /// @param feeOrderFillResults Amounts filled and fees paid for fee orders.
- /// @param zrxBuyAmount The amount of ZRX that needed to be repurchased after filling primary orders.
- function assertValidFillResults(
- FillResults memory orderFillResults,
- FillResults memory feeOrderFillResults,
- uint256 zrxBuyAmount
- )
- internal
- view
- {
- // Ensure that all ZRX spent while filling primary orders has been repurchased.
- uint256 zrxPurchased = safeSub(feeOrderFillResults.makerAssetFilledAmount, feeOrderFillResults.takerFeePaid);
- require(
- zrxPurchased >= zrxBuyAmount,
- "COMPLETE_FILL_FAILED"
- );
-
- // Ensure that no extra WETH owned by this contract has been sold.
- uint256 wethSold = safeAdd(orderFillResults.takerAssetFilledAmount, feeOrderFillResults.takerAssetFilledAmount);
- require(
- wethSold <= msg.value,
- "OVERSOLD_WETH"
- );
- }
}
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinWeth.sol b/packages/contracts/src/2.0.0/forwarder/MixinWeth.sol
index 8ba236e7f..e07940776 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinWeth.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinWeth.sol
@@ -71,12 +71,16 @@ contract MixinWeth is
"FEE_PERCENTAGE_TOO_LARGE"
);
- // Calculate amount of WETH that hasn't been sold.
- uint256 wethRemaining = safeSub(
- msg.value,
- safeAdd(wethSoldExcludingFeeOrders, wethSoldForZrx)
+ // Ensure that no extra WETH owned by this contract has been sold.
+ uint256 wethSold = safeAdd(wethSoldExcludingFeeOrders, wethSoldForZrx);
+ require(
+ wethSold <= msg.value,
+ "OVERSOLD_WETH"
);
+ // Calculate amount of WETH that hasn't been sold.
+ uint256 wethRemaining = safeSub(msg.value, wethSold);
+
// Calculate ETH fee to pay to feeRecipient.
uint256 ethFee = getPartialAmount(
feePercentage,
diff --git a/packages/contracts/src/2.0.0/forwarder/mixins/MExchangeWrapper.sol b/packages/contracts/src/2.0.0/forwarder/mixins/MExchangeWrapper.sol
index 5a2def7e5..360dea0e4 100644
--- a/packages/contracts/src/2.0.0/forwarder/mixins/MExchangeWrapper.sol
+++ b/packages/contracts/src/2.0.0/forwarder/mixins/MExchangeWrapper.sol
@@ -60,7 +60,7 @@ contract MExchangeWrapper {
/// @param makerAssetFillAmount Desired amount of makerAsset to buy.
/// @param signatures Proofs that orders have been signed by makers.
/// @return Amounts filled and fees paid by makers and taker.
- function marketBuyWithWeth(
+ function marketBuyExactAmountWithWeth(
LibOrder.Order[] memory orders,
uint256 makerAssetFillAmount,
bytes[] memory signatures
@@ -77,7 +77,7 @@ contract MExchangeWrapper {
/// @param zrxBuyAmount Desired amount of ZRX to buy.
/// @param signatures Proofs that orders have been created by makers.
/// @return totalFillResults Amounts filled and fees paid by maker and taker.
- function marketBuyZrxWithWeth(
+ function marketBuyExactZrxWithWeth(
LibOrder.Order[] memory orders,
uint256 zrxBuyAmount,
bytes[] memory signatures
diff --git a/packages/contracts/src/2.0.0/forwarder/mixins/MForwarderCore.sol b/packages/contracts/src/2.0.0/forwarder/mixins/MForwarderCore.sol
deleted file mode 100644
index 0f5cd9c66..000000000
--- a/packages/contracts/src/2.0.0/forwarder/mixins/MForwarderCore.sol
+++ /dev/null
@@ -1,42 +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 "../../protocol/Exchange/libs/LibFillResults.sol";
-import "../interfaces/IForwarderCore.sol";
-
-
-contract MForwarderCore is
- IForwarderCore
-{
-
- /// @dev Ensures that all ZRX fees have been repurchased and no extra WETH owned by this contract has been sold.
- /// @param orderFillResults Amounts filled and fees paid for primary orders.
- /// @param feeOrderFillResults Amounts filled and fees paid for fee orders.
- /// @param zrxBuyAmount The amount of ZRX that needed to be repurchased after filling primary orders.
- function assertValidFillResults(
- LibFillResults.FillResults memory orderFillResults,
- LibFillResults.FillResults memory feeOrderFillResults,
- uint256 zrxBuyAmount
- )
- internal
- view;
-}