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pragma solidity 0.8.17;

import "./interfaces/IArtisant.sol";
import "./libs/Owned.sol";

contract Burner is Owned {

    event Burn(address indexed item_owner, uint256 indexed id, uint256 indexed drop);

    IArtisant public artisant;
    address public operator;
    uint256 public refund = 25; // %

    mapping(bytes32 => bool) private _hashUsed;

    //// CONSTRUCTOR ////

    constructor(
        IArtisant _artisant,
        address _operator,
        address owner_
    ) Owned(owner_) {
        artisant = _artisant;
        operator = _operator;
    }

    //// PUBLIC ////

    function burn(
        uint256 id,
        bytes32 hash,
        bytes memory signature
    ) public {
        verifySignature(hash, signature);
        _hashUsed[hash] = true;
        uint256 drop = artisant.idToDrop(id);
        uint256 price = artisant.dropPrice(drop);
        uint256 refundAmount = price * refund / 100;
        artisant.transferFrom(msg.sender, 0x000000000000000000000000000000000000dEaD, id);
        (bool sent,) = msg.sender.call{value: refundAmount}("");
        require(sent, "Failed to refund");
    }

    //// ONLY OWNER ////

    function setRefund(uint256 _refund) public onlyOwner {
        refund = _refund;
    }

    function setOperator(address _operator) public onlyOwner {
        operator = _operator;
    }

    function setArtisant(IArtisant _artisant) public onlyOwner {
        artisant = _artisant;
    }

    function withdraw() public onlyOwner {
        (bool sent,) = owner.call{value: address(this).balance}("");
        require(sent, "Failed to withdraw");
    }

    //// PRIVATE ////

    function verifySignature(
        bytes32 hash,
        bytes memory signature
    ) private view {
        require(signature.length == 65, "INVALID_SIGNATURE_LENGTH");
        require(!_hashUsed[hash], "HASH_ALREADY_USED");

        bytes32 r;
        bytes32 s;
        uint8 v;

        assembly {
            r := mload(add(signature, 32))
            s := mload(add(signature, 64))
            v := and(mload(add(signature, 65)), 255)
        }

        require(uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0, "INVALID_SIGNATURE_S_PARAMETER");
        require(v == 27 || v == 28, "INVALID_SIGNATURE_V_PARAMETER");

        require(ecrecover(hash, v, r, s) == operator, "INVALID_SIGNER");
    }

    receive() external payable{}

}

pragma solidity 0.8.17;

interface IArtisant {

    function transferFrom(address from, address to, uint256 id) external;
    function idToDrop (uint256 id) external view returns (uint256);
    function dropPrice(uint256 drop) external view returns (uint256);

}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Simple single owner authorization mixin.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/auth/Owned.sol)
abstract contract Owned {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event OwnershipTransferred(address indexed user, address indexed newOwner);

    /*//////////////////////////////////////////////////////////////
                            OWNERSHIP STORAGE
    //////////////////////////////////////////////////////////////*/

    address public owner;

    modifier onlyOwner() virtual {
        require(msg.sender == owner, "UNAUTHORIZED");

        _;
    }

    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(address _owner) {
        owner = _owner;

        emit OwnershipTransferred(address(0), _owner);
    }

    /*//////////////////////////////////////////////////////////////
                             OWNERSHIP LOGIC
    //////////////////////////////////////////////////////////////*/

    function transferOwnership(address newOwner) public virtual onlyOwner {
        owner = newOwner;

        emit OwnershipTransferred(msg.sender, newOwner);
    }
}

{
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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[{"inputs":[{"internalType":"contract IArtisant","name":"_artisant","type":"address"},{"internalType":"address","name":"_operator","type":"address"},{"internalType":"address","name":"owner_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"item_owner","type":"address"},{"indexed":true,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"drop","type":"uint256"}],"name":"Burn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"artisant","outputs":[{"internalType":"contract IArtisant","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"bytes32","name":"hash","type":"bytes32"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"operator","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"refund","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IArtisant","name":"_artisant","type":"address"}],"name":"setArtisant","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_operator","type":"address"}],"name":"setOperator","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_refund","type":"uint256"}],"name":"setRefund","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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0000000000000000000000002011a462ffe42516d98c0b23c608c16c9e5f48d1000000000000000000000000c8fe6a7c38a69d8cf03895939a703d91916dd34d000000000000000000000000c2614e3ade094a35e9ff83d8ef4c39be74f6fe3d

-----Decoded View---------------
Arg [0] : _artisant (address): 0x2011A462fFE42516D98c0B23C608c16c9e5f48d1
Arg [1] : _operator (address): 0xC8Fe6a7C38a69d8Cf03895939A703D91916Dd34D
Arg [2] : owner_ (address): 0xC2614E3AdE094a35e9fF83d8ef4C39BE74F6Fe3d

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000002011a462ffe42516d98c0b23c608c16c9e5f48d1
Arg [1] : 000000000000000000000000c8fe6a7c38a69d8cf03895939a703d91916dd34d
Arg [2] : 000000000000000000000000c2614e3ade094a35e9ff83d8ef4c39be74f6fe3d