Contract

0xEdb7147Ebf348b12e5c3E97D34C27Ff72bF31C99

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0x83a0ccDf...a00C95384 at txn 0x8e90640add2ccfbbe8d378c40650505e6c06022073f31e707c62f6c9b2cd6398

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Latest 3 from a total of 3 transactions

Transaction Hash	Method	Block		From		To	Value
0x1e22e6cea993a4c10949da4abcd04042e47dd1acab0ef4be29bd28606b017f8e	Bid	19538000	2024-03-29 6:53:11	45 days ago	1711695191	0x83a0ccDf...a00C95384	IN	0xEdb7147E...72bF31C99	0.00162425	20.63487613
0x9a761704504a75fc25d4a3ebfd8d421c9c9dd11e216de788665b6b31a534e8a3	Start	19533738	2024-03-28 16:22:47	46 days ago	1711642967	0x83a0ccDf...a00C95384	IN	0xEdb7147E...72bF31C99	0.00629519	56.35701655
0x8e90640add2ccfbbe8d378c40650505e6c06022073f31e707c62f6c9b2cd6398	0x60806040	19531627	2024-03-28 9:09:47	46 days ago	1711616987	0x83a0ccDf...a00C95384	IN	Create: EnglishAuction	0.04258223	24.86065895

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Contract Source Code Verified (Exact Match)

Contract Name:

EnglishAuction

Compiler Version

v0.8.23+commit.f704f362

Optimization Enabled:

No with 1000 runs

Other Settings:

paris EvmVersion

Contract Source Code (Solidity Standard Json-Input format)

IDE

File 1 of 1 : EnglishAuction.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

// adjusted, original copied from https://solidity-by-example.org/app/english-auction/

interface IERC721 {
    function safeTransferFrom(address from, address to, uint tokenId) external;

    function transferFrom(address, address, uint) external;
}

interface IERC20 {
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    function transfer(address recipient, uint256 amount) external returns (bool);
}

contract EnglishAuction {
    event Start();
    event Bid(address indexed sender, uint amount);
    event Withdraw(address indexed bidder, uint amount);
    event WithdrawFailed(address indexed bidder, uint amount);
    event End(address winner, uint amount);

    IERC721 public nft;
    uint public nftId;

    IERC20 public biddingToken;

    address public seller;
    address public beneficiary10Percent;
    address public beneficiary90Percent;
    uint public endAt;
    bool public started;
    bool public ended;

    address public highestBidder;
    uint public highestBid;
    mapping(address => uint) public failedWithdraws;

    constructor(address _nft, uint _nftId, uint _startingBid, address _biddingToken, address _beneficiary90Percent, address _beneficiary10Percent) {
        nft = IERC721(_nft);
        nftId = _nftId;

        biddingToken = IERC20(_biddingToken);

        seller = msg.sender;
        beneficiary90Percent = _beneficiary90Percent;
        beneficiary10Percent = _beneficiary10Percent;
        highestBid = _startingBid;
    }

    function start() external {
        require(!started, "started");
        require(msg.sender == seller, "not seller");

        nft.transferFrom(msg.sender, address(this), nftId);
        started = true;
        endAt = block.timestamp + 6 days;

        emit Start();
    }

    function bid(uint bidAmount) external {
        require(started, "not started");
        require(block.timestamp < endAt, "ended");
        require(bidAmount > highestBid, "bidAmount < highest");

        require(biddingToken.transferFrom(msg.sender, address(this), bidAmount), "transfer failed");

        // adjusted with logic that was previously in withdraw to automatically payout overbid accounts
        if (highestBidder != address(0)) {
            bool sent = biddingToken.transfer(highestBidder, highestBid); // we want to handle failures manually, failing payout shouldn't prevent bidding

            if (sent) {
                emit Withdraw(highestBidder, highestBid);
            } else {
                failedWithdraws[highestBidder] += highestBid;
                emit WithdrawFailed(highestBidder, highestBid);
            }
        }

        highestBidder = msg.sender;
        highestBid = bidAmount;

        emit Bid(msg.sender, bidAmount);
    }

    function withdrawFailed() external {
        uint bal = failedWithdraws[msg.sender];
        failedWithdraws[msg.sender] = 0;
        require(biddingToken.transfer(msg.sender, bal), "transfer failed"); // we want to revert on failures

        emit Withdraw(msg.sender, bal);
    }

    function end() external {
        require(started, "not started");
        require(block.timestamp >= endAt, "not ended");
        require(!ended, "ended");

        ended = true;
        if (highestBidder != address(0)) {
            nft.safeTransferFrom(address(this), highestBidder, nftId);

            uint highestBid10Percent = (highestBid * 10) / 100;
            require(biddingToken.transfer(beneficiary10Percent, highestBid10Percent), "transfer failed");
            require(biddingToken.transfer(beneficiary90Percent, highestBid - highestBid10Percent), "transfer failed");
        } else {
            nft.safeTransferFrom(address(this), seller, nftId);
        }

        emit End(highestBidder, highestBid);
    }

    function setEndAt(uint newEndAtTimestamp) external {
        require(msg.sender == seller, "not seller");
        require(started, "not started");
        require(!ended, "ended");
        require(newEndAtTimestamp > block.timestamp, "end at has to be in the future");
        endAt = newEndAtTimestamp;
    }
}

Settings

{
  "optimizer": {
    "enabled": false,
    "runs": 1000
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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Contract ABI

[{"inputs":[{"internalType":"address","name":"_nft","type":"address"},{"internalType":"uint256","name":"_nftId","type":"uint256"},{"internalType":"uint256","name":"_startingBid","type":"uint256"},{"internalType":"address","name":"_biddingToken","type":"address"},{"internalType":"address","name":"_beneficiary90Percent","type":"address"},{"internalType":"address","name":"_beneficiary10Percent","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Bid","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"winner","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"End","type":"event"},{"anonymous":false,"inputs":[],"name":"Start","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"bidder","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdraw","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"bidder","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"WithdrawFailed","type":"event"},{"inputs":[],"name":"beneficiary10Percent","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"beneficiary90Percent","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"bidAmount","type":"uint256"}],"name":"bid","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"biddingToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"end","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"endAt","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ended","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"failedWithdraws","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"highestBid","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"highestBidder","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nft","outputs":[{"internalType":"contract IERC721","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nftId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"seller","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"newEndAtTimestamp","type":"uint256"}],"name":"setEndAt","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"start","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"started","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdrawFailed","outputs":[],"stateMutability":"nonpayable","type":"function"}]

Contract Creation Code

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

00000000000000000000000021544d6b57fdf290d2f0e7e96ef13a38984af56a0000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000003b9aca000000000000000000000000003fab0bbaa03bceaf7c49e2b12877db0142be65fc0000000000000000000000000d1e3e9e74462c88faecdb73d7185e17677584e000000000000000000000000083a0ccdf20fe4dbcec74c1c88b5df27a00c95384

-----Decoded View---------------
Arg [0] : _nft (address): 0x21544d6b57FDf290d2f0e7e96Ef13A38984Af56a
Arg [1] : _nftId (uint256): 1
Arg [2] : _startingBid (uint256): 1000000000
Arg [3] : _biddingToken (address): 0x3FAb0bBAa03BCEAF7C49E2b12877dB0142BE65FC
Arg [4] : _beneficiary90Percent (address): 0x0d1E3e9E74462c88fAECdB73d7185E17677584E0
Arg [5] : _beneficiary10Percent (address): 0x83a0ccDf20Fe4dBCec74C1C88B5DF27a00C95384

-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 00000000000000000000000021544d6b57fdf290d2f0e7e96ef13a38984af56a
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [2] : 000000000000000000000000000000000000000000000000000000003b9aca00
Arg [3] : 0000000000000000000000003fab0bbaa03bceaf7c49e2b12877db0142be65fc
Arg [4] : 0000000000000000000000000d1e3e9e74462c88faecdb73d7185e17677584e0
Arg [5] : 00000000000000000000000083a0ccdf20fe4dbcec74c1c88b5df27a00c95384

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.

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