add all the auctions

Auctions.sol

+pragma solidity ^0.4.4;
+import "DAuction.sol";
+import "DVickreyAuction.sol";
+import "DDutchAuction.sol";
+import "DEnglishAuction.sol";
+
+//This code is provided for you. You can modify if you want to for debugging, but you shouldn't need to put any logic here.
+contract DAuctions {
+
+    mapping(uint256 => DAuction) auctions;
+    uint256 numAuctions;
+
+    // This function is used for testing
+    function testAuction(uint256 id) returns (uint256 aid){
+      return numAuctions;
+    }
+    
+    function beginDutchAuction(uint256 reservePrice, address judgeAddress, uint256 biddingTimePeriod, uint256 offerPriceDecrement) returns(uint256 auctionID) {
+        auctionID = numAuctions++;
+        auctions[auctionID] = new DDutchAuction(reservePrice, judgeAddress, biddingTimePeriod, offerPriceDecrement);
+        return auctionID;
+    }
+
+    function beginEnglishAuction(uint256 reservePrice, address judgeAddress, uint256 biddingTimePeriod, uint256 minBidIncrement) returns(uint256 auctionID) {
+        auctionID = numAuctions++;
+        auctions[auctionID] = new DEnglishAuction(reservePrice, judgeAddress, biddingTimePeriod, minBidIncrement);
+        return auctionID;
+    }
+
+    function beginVickreyAuction(uint256 reservePrice, address judgeAddress, uint256 commitTimePeriod, uint256 revealTimePeriod, uint256 bidDepositAmount) returns(uint256 auctionID) {
+        auctionID = numAuctions++;
+        auctions[auctionID] = new DVickreyAuction(reservePrice, judgeAddress, commitTimePeriod, revealTimePeriod, bidDepositAmount);
+        return auctionID;
+    }
+
+    function bid(uint256 id) payable returns(address) {
+        return auctions[id].bid.value(msg.value)();
+    }
+
+    function finalize(uint256 id) {
+        auctions[id].finalize();
+    }
+
+    function refund(uint256 id, uint256 amount) {
+        auctions[id].refund(amount);
+    }
+
+    function revealBid(uint256 id, uint256 nonce) payable returns(address) {
+        return auctions[id].revealBid.value(msg.value)(nonce);
+    }
+
+    function commitBid(uint256 id, bytes32 bidCommitment) payable returns(bool) {
+        return auctions[id].commitBid.value(msg.value)(bidCommitment);
+    }
+}

DutchAuction.sol

+pragma solidity ^0.4.4;
+import "DAuction.sol";
+contract DDutchAuction is DAuction {
+
+	uint256 decrementPerBlock;
+	bool bidover;
+	uint256 startPrice;
+	bool refundCalled;
+	bool finalizeCalled;
+
+
+
+	// constructor
+	function DDutchAuction(uint256 reservePrice, address judgeAddress, uint256 biddingPeriod, uint256 offerPriceDecrement) DAuction(reservePrice, biddingPeriod, judgeAddress) {
+	    decrementPerBlock = offerPriceDecrement;
+	    startPrice = reservePrice+biddingPeriod*offerPriceDecrement;
+	}
+
+	function bid() biddingOpen payable returns(address highestBidderAddr){
+		uint256 currentPrice = startPrice-(block.number-startBlockNum)*decrementPerBlock;
+		require(msg.value >= currentPrice);
+		highestBidder = msg.sender;
+		highestBid = msg.value;
+		bidover = true;
+		return highestBidder;
+	}
+
+
+	function finalize(){
+		require(msg.sender==highestBidder || msg.sender = judgeAddress);
+		require(!refundCalled && !finalizeCalled);
+		finalizeCalled=truel
+		creator.transfer(highestBid);
+	}
+
+
+	function refund(uint256 refundAmount) auctionOver judgeOnly {
+		require(highestBidder!=0);
+		require(refundAmount<= this.balance);
+		require(!finalizeCalled && !refundCalled);
+		refundCalled=true;
+		highestBidder.transfer(refundAmount);
+		creator.transfer(this.balance);
+	}
+
+	modifier biddingOpen {
+		require(block.number<=startBlockNum+biddingBlocksNum);
+		require(!bidover);
+		_;
+	}
+
+	modifier auctionOver {
+		require(block.number>startBlockNum+biddingBlocksNum || bidover);
+		_;
+	}
+}

EnglishAuction.sol

+pragma solidity ^0.4.4;
+import "DAuction.sol";
+
+contract DEnglishAuction is DAuction {
+
+	uint256 minBidIncrement;
+	uint numUnchallengedBlocks;
+	uint lastBidBlock;
+
+	mapping (address => uint) PendingWithdrawals;
+	bool refundCalled;
+	bool finalizeCalle
+
+    // constructor
+    function DEnglishAuction(uint256 reservePrice, address judgeAddress, uint256 biddingTimePeriod, uint256 minBidIncrement) DAuction(reservePrice, biddingTimePeriod, judgeAddress) {
+        this.minBidIncrement = minBidIncrement;
+        numUnchallengedBlocks = 3;
+    }
+
+    function bid() biddingOpen payable returns(address highestBidderAddr) {
+    	require(msg.value >= minimumPrice);
+    	require(msg.value >= highestBid + minBidIncrement);
+    	if(highestBidder!=0){
+    		if(!highestBidder.send(highestBid)){
+    			PendingWithdrawals[highestBidder]+=highestBid;
+    		}
+    	}
+    	highestBidder = msg.sender;
+    	highestBid = msg.value;
+    	lastBidBlock = block.number;
+    	return highestBidder;
+    }
+
+    
+
+    function finalize() auctionOver {
+    	require(msg.sender==highestBidder || msg.sender = judgeAddress);
+    	require(!refundCalled && !finalizeCalled);
+    	finalizeCalled=true;
+    	creator.transfer(highestBid);
+    }
+
+    function refund(uint256 refundAmount) auctionOver judgeOnly {
+    	require(highestBidder!=0);
+		require(refundAmount<= this.balance);
+		require(!finalizeCalled && !refundCalled);
+		refundCalled = true;
+		highestBidder.transfer(refundAmount);
+		creator.transfer(highestBid-refundAmount);
+    }
+
+    function withdraw(){
+    	int amount = PendingWithdrawals[msg.sender];
+    	PendingWithdrawals[msg.sender]=0;
+    	if(amount>0){
+    		msg.sender.transfer(amount);
+    	}
+    }
+
+    modifier auctionOver {
+    	require(block.number > startBlockNum+biddingBlocksNum);
+    	_;
+    }
+
+
+    modifier biddingOpen {
+    	require(lastBidBlock+numUnchallengedBlocks>=block.number);
+		require(block.number<=startBlockNum+biddingBlocksNum);
+		_;
+    }
+
+}

VickreyAuction.sol

@@ -3,62 +3,103 @@ import "DAuction.sol";
 
 contract DVickreyAuction is DAuction {
 
-    uint256 public bidDepositAmount;
-    uint256 public revealBlocksNum;
-    uint256 secondHighestBid;
-
-    bool refundCalled;
-    bool finalizeCalled;
-
-
-    // constructor
-    function DVickreyAuction(uint256 reservePrice, address judgeAddress, uint256 commitTimePeriod, uint256 revealTimePeriod, uint256 _bidDepositAmount) DAuction(reservePrice, commitTimePeriod, judgeAddress) {
-        bidDepositAmount = _bidDepositAmount;
-        revealBlockNum = revealTimePeriod; 
-    }
-
-    function commitBid(bytes32 bidCommitment) biddingOpen payable returns(bool) {
-        throw;
-    }
-
-    function revealBid(uint256 nonce) revealOpen payable returns(address highestBidder) {
-        throw;
-    }
-
-    function finalize() auctionover {
-        require(msg.sender == highestBidder);
-        require(!refundCalled && !finalizeCalled);
-        finalizeCalled=true;
-        creator.transfer(secondHighestBid);
-    }
-
-    function refund(uint256 refundAmount) auctionOver judgeOnly {
-        require(highestBidder!=0);
-        require(refundAmount<= this.balance);
-        require(!finalizeCalled && !refundCalled);
-        refundCalled=true;
-        highestBidder.transfer(refundAmount);
-        creator.transfer(secondHighestBid-refundAmount);
-    }
-
-    function withdraw() auctionover returns (uint){
-        throw;
-    }
-
-    modifier auctionover {
-        require(block.blockNum > startBlockNum+biddingBlocksNum+revealBlocksNum);
-        _;
-    }
-
-    modifier biddingOpen {
-        require(block.blockNum <= startBlockNum+biddingBlocksNum);
-        _;
-    }
-
-    modifier revealOpen {
-        require(block.blockNum > startBlockNum+biddingBlocksNum);
-        require(block.blockNum <= startBlockNum+biddingBlocksNum+revealBlocksNum);
-        _;
-    }
+	uint256 public bidDepositAmount;
+	uint256 public revealBlocksNum;
+	uint256 secondHighestBid;
+
+	bool refundCalled;
+	bool finalizeCalled;
+
+	mapping ( address => mapping ( bytes32 => uint32) ) deposits;   // maps address,bid => count
+
+	mapping ( address => uint ) bidAmount;
+
+	// constructor
+	function DVickreyAuction(uint256 reservePrice, address judgeAddress, uint256 commitTimePeriod, uint256 revealTimePeriod, uint256 _bidDepositAmount) DAuction(reservePrice, commitTimePeriod, judgeAddress) {
+		bidDepositAmount = _bidDepositAmount;
+		revealBlockNum = revealTimePeriod; 
+	}
+
+	function commitBid(bytes32 bidCommitment) biddingOpen payable returns(bool) {
+		require(msg.value == bidDepositAmount);
+		deposits[msg.sender][bidCommitment]+=msg.value;
+		return true;
+	}
+
+
+	function revealBid(uint256 nonce) revealOpen payable returns(address highestBidder) {
+		bytes32 commitval = sha3(nonce,msg.value);
+		require(deposits[msg.sender][commitval]>0);
+		deposits[msg.sender][commitval]--;
+		bidAmount[msg.sender]+=msg.value;
+		if(msg.value>secondHighestBid && msg.value>=minimumPrice){
+			if(msg.value>highestBid){
+				secondHighestBid = highestBid;
+				highestBid = msg.value;
+				highestBidder = msg.sender;
+			}else{
+				secondHighestBid = msg.value;
+			}
+		}
+		msg.sender.transfer(bidDepositAmount);
+		returns highestBidder;
+	}
+
+	function finalize() auctionover {
+		require(msg.sender == highestBidder);
+		require(!refundCalled && !finalizeCalled);
+		finalizeCalled=true;
+		if(secondHighestBid==0 && highestBid!=0){
+			creator.transfer(minimumPrice);
+		}else if(secondHighestBid>0){
+			creator.transfer(secondHighestBid);
+		}
+	}
+
+	function refund(uint256 refundAmount) auctionOver judgeOnly {
+		require(highestBidder!=0);
+		require(refundAmount<=this.balance);
+		require(!finalizeCalled && !refundCalled);
+		refundCalled=true;
+		highestBidder.transfer(refundAmount);
+		if(secondHighestBid==0 && highestBid>0){
+			if(minimumPrice>refundAmount)
+				creator.transfer(minimumPrice-refundAmount)
+		}else if (secondHighestBid>refundAmount)
+			creator.transfer(secondHighestBid-refundAmount);
+	}
+
+	function withdraw() auctionover returns (uint){
+		uint amount;
+		if(msg.sender==highestBidder){
+			uint payAmount = secondHighestBid;
+			if(secondHighestBid == 0)
+				payAmount = minimumPrice;
+			amount = bidAmount[msg.sender]-payAmount;
+			bidAmount[msg.sender]=payAmount;
+			msg.sender.transfer(amount);
+			return amount;
+		}
+		amount = bidAmount[msg.sender];
+		bidAmount[msg.sender] = 0;
+		msg.sender.transfer(amount);
+		return amount;
+	}
+
+	modifier auctionover {
+		require(block.blockNum > startBlockNum+biddingBlocksNum+revealBlocksNum);
+		_;
+	}
+
+	modifier biddingOpen {
+		require(block.blockNum <= startBlockNum+biddingBlocksNum);
+		_;
+	}
+
+	modifier revealOpen {
+		require(block.blockNum > startBlockNum+biddingBlocksNum);
+		require(block.blockNum <= startBlockNum+biddingBlocksNum+revealBlocksNum);
+		_;
+	}
 
 }
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