// 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;
    }
}

// SPDX-License-Identifier: Unlicense
pragma solidity =0.8.27;

/// @title Errors: A library that stores common errors.
library Errors {
    error InvalidAddress();
    error InvalidAmount();
    error InvalidIndex();
    error InvalidPayment();
    error Unauthorized();
    error PrematureExecution();
    error InsufficientFunds();
    error Unavailable();
}

// SPDX-License-Identifier: Unlicense
pragma solidity =0.8.27;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "contracts/lib/Errors.sol";
import "contracts/utils/SafeETHTransfer.sol";

/// @title Fee handler - Handles CreatorBid fees.
contract FeeHandler is Ownable, ReentrancyGuard, SafeETHTransfer {
    address public receiver;

    event ReceiverUpdated(address receiver);
    event Payment(address indexed from, uint256 value);

    /**
     * @param _multiSig Multi-sig admin address.
     * @param _receiver Receiver.
     */
    constructor(address _multiSig, address _receiver) Ownable(_multiSig) {
        _setReceiver(_receiver);
    }

    /**
     * @notice Set the receiver of the fees.
     * @param _receiver Receiver.
     */
    function setReceiver(address _receiver) external onlyOwner {
        _setReceiver(_receiver);
    }

    /// @notice Pay a fee to the receiver.
    function pay() external payable nonReentrant {
        if (msg.value > 0) {
            _safeETHTransfer(receiver, msg.value);
            emit Payment(msg.sender, msg.value);
        }
    }

    /// @param _receiver Receiver.
    function _setReceiver(address _receiver) private {
        if (_receiver == address(0)) revert Errors.InvalidAddress();
        receiver = _receiver;
        emit ReceiverUpdated(_receiver);
    }
}

// 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 v5.0.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant NOT_ENTERED = 1;
    uint256 private constant ENTERED = 2;

    uint256 private _status;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    constructor() {
        _status = NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be NOT_ENTERED
        if (_status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

        // Any calls to nonReentrant after this point will fail
        _status = ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == ENTERED;
    }
}

// SPDX-License-Identifier: Unlicense
pragma solidity =0.8.27;

import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "contracts/lib/Errors.sol";

/// @title SafeETHTransfer: Safely transfers ETH.
contract SafeETHTransfer is ReentrancyGuard {
    mapping(address => uint256) private _stuckETH;

    error TransferFailed(address account, uint256 amount);
    error NothingStuck();

    event StuckETHClaimed(address indexed account, address indexed receiver, uint256 amount);
    event ETHTransferFailed(address indexed account, uint256 amount);

    /**
     * @notice Claim stuck ETH.
     * @param _receiver Address to receive the ETH.
     */
    function claimStuckETH(address _receiver) external nonReentrant {
        if (_receiver == address(0)) revert Errors.InvalidAddress();
        uint256 amount = _stuckETH[msg.sender];
        if (amount == 0) revert NothingStuck();
        /// @dev clear balance prior to transferring to prevent reentrancy in receive() function.
        _stuckETH[msg.sender] = 0;
        _safeETHTransferWithRevert(_receiver, amount);
        emit StuckETHClaimed(msg.sender, _receiver, amount);
    }

    /**
     * @notice Get the amount of stuck ETH for a given address.
     * @param _address Address.
     * @return uint256 ETH stuck.
     */
    function getStuckETHTokens(address _address) external view returns (uint256) {
        if (_address == address(0)) revert Errors.InvalidAddress();
        return _stuckETH[_address];
    }

    /**
     * @param _account Address to transfer _amount to.
     * @param _amount Amount of the ETH to transfer.
     */
    function _safeETHTransfer(address _account, uint256 _amount) internal {
        (bool success, ) = _account.call{value: _amount}("");
        if (!success) {
            _stuckETH[_account] += _amount;
            emit ETHTransferFailed(_account, _amount);
        }
    }

    /**
     * @param _account Address.
     * @param _amount Amount of the ETH to transfer.
     */
    function _safeETHTransferWithRevert(address _account, uint256 _amount) internal {
        (bool success, ) = _account.call{value: _amount}("");
        if (!success) revert TransferFailed(_account, _amount);
    }
}

{
  "compilationTarget": {
    "contracts/fee/FeeHandler.sol": "FeeHandler"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}