Base Class for Auctions

Auction.sol

+pragma solidity ^0.4.4;
+contract DAuction {
+	
+	uint256 minimumPrice;  
+	uint256 biddingBlocksNum;  
+	address judgeAddr;
+	uint256 startBlockNum;
+	address creator;
+
+	address highestBidder;
+	uint256 highestBid;
+	
+
+	// constructor
+	function DAuction(uint256 reservePrice, uint256 biddingTimePeriod, address judgeAddress) {
+		minimumPrice = reservePrice;
+		blocksNum = biddingTimePeriod;
+		judgeAddr = judgeAddress;
+		startBlockNum = block.number; 
+		creator = msg.sender;
+	}
+
+	// Three types of bidding functions. If not overriden, these generate errors
+	function bid() biddingOpen payable {
+		throw;
+	}
+
+	function commitBid(bytes32 bidCommitment) biddingOpen payable returns(bool) {
+		throw;
+	}
+
+	function revealBid(uint256 nonce) payable returns(address highestBidder) {
+		throw;
+	}
+
+	function finalize() auctionOver {
+		throw;
+	}
+
+	
+	function refund(uint256 refundAmount) auctionOver judgeOnly {
+		throw;
+	}
+
+	modifier biddingOpen {
+		throw;
+		_;
+	}
+
+	modifier auctionOver {
+		throw;
+		_;
+	}
+
+	modifier judgeOnly {
+		require(msg.sender == judgeAddress);
+		_;
+	}
+
+	
+}