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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";

/// @title PaymentVault
/// @notice Simple vault that accepts ETH payments and allows the owner to withdraw to arbitrary recipients.
contract PaymentVault is Ownable {
    /// @dev Emitted when `sender` makes a payment of `amount` ETH.
    event Payment(address indexed sender, uint256 amount);

    /// @dev Emitted when the owner withdraws `amount` of ETH to `recipient`.
    event Withdrawal(address indexed recipient, uint256 amount);

    constructor() Ownable(msg.sender) {}

    /// @notice Make a payment to the vault.
    function pay() external payable {
        require(msg.value > 0, "PaymentVault: payment value must be positive");
        emit Payment(msg.sender, msg.value);
    }

    /// @notice Withdraw `amount` of ETH to `recipient`.
    /// @param recipient Address that will receive the withdrawn ETH.
    /// @param amount Amount of ETH (in wei) to withdraw.
    function withdraw(address payable recipient, uint256 amount) external onlyOwner {
        require(recipient != address(0), "PaymentVault: recipient is zero address");
        require(amount > 0, "PaymentVault: amount is zero");
        require(address(this).balance >= amount, "PaymentVault: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "PaymentVault: ETH transfer failed");

        emit Withdrawal(recipient, amount);
    }

    /// @notice Returns the current ETH balance held by the vault.
    function balance() external view returns (uint256) {
        return address(this).balance;
    }

    /// @notice Receive function enabling direct ETH transfers without calldata.
    receive() external payable {
        require(msg.value > 0, "PaymentVault: payment value must be positive");
        emit Payment(msg.sender, msg.value);
    }

    /// @notice Fallback function to accept ETH with calldata.
    fallback() external payable {
        require(msg.value > 0, "PaymentVault: payment value must be positive");
        emit Payment(msg.sender, msg.value);
    }
}

// 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 v5.0.1) (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;
    }
}

{
  "evmVersion": "cancun",
  "optimizer": {
    "enabled": true,
    "runs": 95000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "remappings": [
    "project/:@openzeppelin/contracts/=npm/@openzeppelin/[email protected]/"
  ]
}

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