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chore: SafeMath and if statement in getAuctionDetails

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This commit is contained in:
Jacob Evans
2018-12-04 09:10:59 +11:00
parent 0bffc3d10e
commit 247266b969
1 changed files with 18 additions and 10 deletions
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28
packages/contracts/contracts/extensions/DutchAuction/DutchAuction.sol
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@@ -114,7 +114,8 @@ contract DutchAuction is
// |----------|--------|---------|-------------------------------------|
// | Header | 0 | 4 | function selector |
// | Params | | 1 * 32 | function parameters: |
// | | 4 | 12 + 20 | 1. token address |
// | | 4 | 12 | 1. token address padding |
// | | 16 | 20 | 2. token address |
bytes memory assetData = sellOrder.takerAssetData;
address token = assetData.readAddress(16);
// Calculate the excess from the buy order. This can occur if the buyer sends in a higher
@@ -183,15 +184,22 @@ contract DutchAuction is
auctionDetails.currentTimeSeconds = timestamp;
uint256 remainingDurationSeconds = order.expirationTimeSeconds-timestamp;
uint256 currentAmount = minAmount + (remainingDurationSeconds*amountDelta/auctionDurationSeconds);
// Check the bounds where we SafeMath was avoivded so the auction details can be queried prior
// and after the auction time.
// If the auction has not yet begun the current amount is the auctionBeginAmount
currentAmount = timestamp < auctionBeginTimeSeconds ? auctionBeginAmount : currentAmount;
// If the auction has ended the current amount is the minAmount
// auction end time is guaranteed by 0x Exchange to fail due to the order expiration
currentAmount = timestamp >= order.expirationTimeSeconds ? minAmount : currentAmount;
auctionDetails.currentAmount = currentAmount;
if (timestamp < auctionBeginTimeSeconds) {
// If the auction has not yet begun the current amount is the auctionBeginAmount
auctionDetails.currentAmount = auctionBeginAmount;
} else if (timestamp >= order.expirationTimeSeconds) {
// If the auction has ended the current amount is the minAmount.
// Auction end time is guaranteed by 0x Exchange due to the order expiration
auctionDetails.currentAmount = minAmount;
} else {
auctionDetails.currentAmount = safeAdd(
minAmount,
safeDiv(
safeMul(remainingDurationSeconds, amountDelta),
auctionDurationSeconds
)
);
}
return auctionDetails;
}
}