auctioncontract.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

contract AuctionHouse {
	address public owner;
	string public item;
	uint public auctionEndTime;
	address private highestBidder;
	uint private highestBid;
	bool public ended;

	mapping(address => uint) public bids;
	address[] public bidders;

	constructor(string memory _item, uint _biddingTime) {
		owner = msg.sender;
		item = _item;
		auctionEndTime = block.timestamp + _biddignTime;
	}

function bid(uint amount) external {
	require(block.timestamp > auctionEndTime, "Auc ended");
	require(amount > 0, " Bid amount must be greater than zero.");
	require(amount > bids[msg.sender], " new bid must be higher");

	if (bids[msg.sender] == 0) {
	    bidders.push.(msg.sender);
	}

	bids[msg.sender] = amount;

	if (amount > highestBid) {
           highestBid = amount;
	   highestBidder = msg.sender;

	}
}


function endAuction() external {
    require(block.timestamp >= auctionEndTime, " auction");
    require(!ended, "ended");

    ended = true;
}

 // Get a list of all bidders
    function getAllBidders() external view returns (address[] memory) {
        return bidders;
    }

    // Retrieve winner and their bid after auction ends
    function getWinner() external view returns (address, uint) {
        require(ended, "Auction has not ended yet.");
        return (highestBidder, highestBid);
    }
}