Contract Source Code:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.30;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract SafeBurnETH is Ownable {
    struct Deposit { address tokenAddress; address sender; uint256 amount; uint256 timestamp; bool processed; }
    uint256 public constant GRACE_PERIOD = 30 days; 
    uint256 public constant BOUNTY_PERCENTAGE = 5; 
    address public constant BURN_ADDRESS = 0x000000000000000000000000000000000000dEaD;
    mapping(address => bool) public isProtected;
    mapping(uint256 => Deposit) public deposits;
    uint256 public depositCount;

    event TokenReceived(uint256 indexed id, address indexed token, string symbol, address indexed sender, uint256 amount);
    event TokenRecovered(uint256 indexed id, address token, address to, uint256 amountReturned, uint256 feeTaken);
    event TokenBurned(uint256 indexed id, address token, address cleaner, uint256 bountyPaid);

    constructor() Ownable(msg.sender) {
        // --- WHITELIST ETHEREUM MAINNET (CHECKSUMS VALIDADOS) ---
        isProtected[0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48] = true; // USDC
        isProtected[0xdAC17F958D2ee523a2206206994597C13D831ec7] = true; // USDT
        isProtected[0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2] = true; // WETH
        isProtected[0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599] = true; // WBTC
        isProtected[0x6B175474E89094C44Da98b954EedeAC495271d0F] = true; // DAI
        isProtected[0x514910771AF9Ca656af840dff83E8264EcF986CA] = true; // LINK
        isProtected[0x95aD61b0a150d79219dCF64E1E6Cc01f0B64C4cE] = true; // SHIB
    }

    function burnWithSafetyNet(address _t, uint256 _a) external {
        require(_a > 0, "Error: 0");
        IERC20(_t).transferFrom(msg.sender, address(this), _a);
        string memory s = "UNKNOWN";
        try IERC20Metadata(_t).symbol() returns (string memory _s) { s = _s; } catch {}
        deposits[depositCount] = Deposit(_t, msg.sender, _a, block.timestamp, false);
        emit TokenReceived(depositCount++, _t, s, msg.sender, _a);
    }

    function userSelfRecover(uint256 _id) external {
        Deposit storage d = deposits[_id];
        require(!d.processed && msg.sender == d.sender, "Error: Auth");
        d.processed = true;
        uint256 fee = (d.amount * 20) / 100;
        IERC20(d.tokenAddress).transfer(d.sender, d.amount - fee);
        emit TokenRecovered(_id, d.tokenAddress, d.sender, d.amount - fee, fee);
    }

    function batchBurn(uint256[] calldata _ids) external {
        uint256 bCount = 0;
        for (uint256 i = 0; i < _ids.length; i++) {
            Deposit storage d = deposits[_ids[i]];
            if (!d.processed && block.timestamp >= d.timestamp + GRACE_PERIOD && !isProtected[d.tokenAddress]) {
                d.processed = true;
                IERC20(d.tokenAddress).transfer(BURN_ADDRESS, d.amount);
                bCount++;
                emit TokenBurned(_ids[i], d.tokenAddress, msg.sender, 0);
            }
        }
        if (bCount > 0 && address(this).balance > 0) {
            payable(msg.sender).transfer((address(this).balance * BOUNTY_PERCENTAGE) / 100);
        }
    }

    function setTokenProtection(address _t, bool _s) external onlyOwner { isProtected[_t] = _s; }

    function withdrawTreasury(address _t) external onlyOwner {
        IERC20(_t).transfer(owner(), IERC20(_t).balanceOf(address(this)));
    }

    function withdrawNative() external onlyOwner { payable(owner()).transfer(address(this).balance); }

    receive() external payable {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity >=0.6.2;

import {IERC20} from "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC-20 standard.
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}