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Update DutchAuction.sol #153

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Update DutchAuction.sol #153

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a4ec8e4
Update DutchAuction.sol
sadityakumar9211 Oct 29, 2022
0eccf41
Update DutchAuction.sol
sadityakumar9211 Oct 29, 2022
201bdee
fixed breaking changes
sadityakumar9211 Oct 29, 2022
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16 changes: 13 additions & 3 deletions contracts/Auction/DutchAuction.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,10 @@ interface IERC721 {
) external;
}

error AuctionExpired();
error AuctionFinished();
error InsufficientValue(uint256 receivedAmount, uint256 requiredAmount);

contract DutchAuction {
event Buy(address winner, uint256 amount);

Expand Down Expand Up @@ -41,15 +45,21 @@ contract DutchAuction {

function buy() external payable {
// Check for the timestamp before buy
require(block.timestamp < expiresAt, "auction expired");
if(block.timestamp >= expiresAt){
revert AuctionExpired();
}

require(winner == address(0), "auction finished");
if(winner != address(0)) {
revert AuctionFinished();
}

uint256 timeElapsed = block.timestamp - startAt;
uint256 deduction = priceDeductionRate * timeElapsed;
uint256 price = startingPrice - deduction;

require(msg.value >= price, "ETH < price");
if(msg.value < price){
revert InsufficientValue(msg.value, price);
}

winner = msg.sender;
nft.transferFrom(seller, msg.sender, nftId);
Expand Down