// File: Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @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;
    }
}
// File: Escrow.sol



// SPDX-License-Identifier: MIT
import "./Ownable.sol";


pragma solidity ^0.8.7;

contract NovaEscrow is Ownable{
    struct withdrawalRequest 
    {
        uint256 amount;
        bool requestApproved;
        bool requestRejected;
        bool withdrawalCompleted;
        uint256 withdrawalId;
        uint256 timestamp; 
    }

    mapping(uint256 => withdrawalRequest) public withdrawalRequests;

    uint256 public withdrawalId;

    address public AUDITOR;

    bool private isAuditorSet = false;

    modifier onlyAuditor(address _sender) {
        require(_sender == AUDITOR , "Invalid address");
        _;
    }

    function requestWithdrawal (uint256 _amount) public onlyOwner {
        require(_amount <= address(this).balance, "Withdrawal limit exceeded.");
        require(_amount > 0, "Withdrawal amount must be greater than 0");
        withdrawalRequests[withdrawalId]=withdrawalRequest(_amount,false,false,false,withdrawalId,block.timestamp);
        withdrawalId+=1;
    }

    function updateAuditor (address _newAuditorAddress) public onlyAuditor(msg.sender) {
        AUDITOR=_newAuditorAddress;
    }

    function setInitialAuditorAddress (address _auditorAddress) public onlyOwner {
        require(!isAuditorSet, "Auditor address already set.");
        AUDITOR=_auditorAddress;
        isAuditorSet = true;
    }

    function approveWithdrawal (uint256 _withdrawalId) public onlyAuditor(msg.sender) {
        require(withdrawalRequests[_withdrawalId].withdrawalCompleted == false, "Withdrawal already completed.");
        withdrawalRequests[_withdrawalId].requestApproved=true;
        withdrawalRequests[_withdrawalId].requestRejected=false;
    }

    function rejectWithdrawal (uint256 _withdrawalId) public onlyAuditor(msg.sender) {
        require(withdrawalRequests[_withdrawalId].withdrawalCompleted == false, "Withdrawal already completed.");
        withdrawalRequests[_withdrawalId].requestRejected=true;
        withdrawalRequests[_withdrawalId].requestApproved=false;
    }

    function withdraw(uint256 _withdrawalId,address _recipientAddress) public onlyOwner {
        require(withdrawalRequests[_withdrawalId].requestApproved == true, "Withdrawal not approved.");
        require(withdrawalRequests[_withdrawalId].withdrawalCompleted == false, "Withdrawal already completed.");

        (bool os, ) = payable(_recipientAddress).call{value: withdrawalRequests[_withdrawalId].amount}("");
        require(os);
        
        withdrawalRequests[_withdrawalId].withdrawalCompleted = true;
    }

    /// Fallbacks 
    receive() external payable { }
    fallback() external payable { }
}
// File: Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "./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.
 *
 * By default, the owner account will be the one that deploys the contract. 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;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @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 {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @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 {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _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);
    }
}