// File: ARITHCrowdsale.sol




// SPDX-License-Identifier: MIT

pragma solidity ^0.8.19;


abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}


pragma solidity ^0.8.19;


abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor() {
        _transferOwnership(_msgSender());
    }

    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}



pragma solidity ^0.8.0;


interface IERC20 {

    event Transfer(address indexed from, address indexed to, uint256 value);


    event Approval(address indexed owner, address indexed spender, uint256 value);


    function totalSupply() external view returns (uint256);


    function balanceOf(address account) external view returns (uint256);


    function transfer(address to, uint256 amount) external returns (bool);


    function allowance(address owner, address spender) external view returns (uint256);


    function approve(address spender, uint256 amount) external returns (bool);


    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}


pragma solidity ^0.8.0;



interface IERC20Metadata is IERC20 {

    function name() external view returns (string memory);


    function symbol() external view returns (string memory);


    function decimals() external view returns (uint8);
}


pragma solidity ^0.8.0;



contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;


    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }


    function name() public view virtual override returns (string memory) {
        return _name;
    }


    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }


    function decimals() public view virtual override returns (uint8) {
        return 18;
    }


    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }


    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }


    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }


    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }


    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }


    function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }


    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }


    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }


    function _transfer(address from, address to, uint256 amount) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }


    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        unchecked {
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }


    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
            _totalSupply -= amount;
        }

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }


    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }


    function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }


    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}


    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}


pragma solidity ^0.8.19;


contract ARITHToken is ERC20, Ownable {
    constructor(uint256 initialSupply) ERC20("ARITH", "ARITH") {
        _mint(msg.sender, initialSupply);
    }

    function transferTokens(address to, uint256 amount) public onlyOwner {
        _transfer(msg.sender, to, amount);
    }
}

contract ARITHCrowdsale {
    address payable public ETHWallet = payable(0x7145E1f54Ae68Fce034ABB1234f9142D7AB230F9);
    uint256 public totalMinted;
    uint256 public maxMintable = 800 * (10 ** 6) * (10 ** 18);
    uint256 public exchangeRate = 25000;
    bool public isFunding;
    bool public isFinalized;
    uint256 public softCap = 15 ether;
    uint256 public hardCap = 1600 ether;
    ARITHToken public Token;
    address public creator;
    uint256 public amountRaised;
    uint256 public saleStartTime;
    uint256 public saleEndTime;

    mapping(address => bool) public whitelist;
    mapping(address => bool) public blacklist;


    event Contribution(address from, uint256 amount);


    constructor(uint256 initialTokenSupply) {
        isFunding = true;
        creator = msg.sender;
        Token = new ARITHToken(initialTokenSupply);
        saleStartTime = block.timestamp;
        saleEndTime = saleStartTime + (6 * 30 days);
    }

    modifier onlyWhileFunding() {
        require(isFunding, "Crowdsale is not active");
        _;
    }

    modifier onlyWhileNotPaused() {
        require(isFunding && !isPaused(), "Crowdsale is paused or not active");
        _;
    }

    modifier onlyWhileNotFinalized() {
        require(isFunding && !isFinalized, "Crowdsale is already finalized or not active");
        _;
    }

    modifier onlyCreator() {
        require(msg.sender == creator, "Only the creator can perform this action");
        _;
    }

    modifier onlyWhitelisted() {
        require(isWhitelisted(msg.sender), "Address is not whitelisted");
        _;
    }

    modifier onlyNotBlacklisted() {
        require(!isBlacklisted(msg.sender), "Address is blacklisted");
        _;
    }


    function contribute() external payable onlyWhileNotPaused onlyWhileFunding onlyNotBlacklisted {
        require(msg.value > 0, "Contribution amount must be more than 0");
        uint256 amount = msg.value * exchangeRate;
        uint256 total = totalMinted + amount;
        require(total <= maxMintable, "Exceeds maximum mintable amount");
        totalMinted = total;
        ETHWallet.transfer(msg.value);
        Token.transferTokens(msg.sender, amount);
        amountRaised += msg.value;
        emit Contribution(msg.sender, amount);
    }


    function hasReachedSoftCap() public view returns (bool) {
        return amountRaised >= softCap;
    }


    function hasReachedHardCap() public view returns (bool) {
        return amountRaised >= hardCap;
    }


    function changeCreator(address _newCreator) public onlyCreator {
        creator = _newCreator;
    }


    function changeETHWallet(address payable _newWallet) public onlyCreator {
        ETHWallet = _newWallet;
    }


    function closeSale() public onlyCreator onlyWhileNotFinalized {
        isFunding = false;
    }


    function updateExchangeRate(uint256 _newRate) public onlyCreator onlyWhileNotFinalized {
        exchangeRate = _newRate;
    }


    function pauseSale() public onlyCreator onlyWhileFunding {
        isFunding = false;
    }


    function resumeSale() public onlyCreator {
        isFunding = true;
    }


    function isPaused() public view returns (bool) {
        return !isFunding;
    }


    function finalize() public onlyCreator onlyWhileNotFinalized {
        require(block.timestamp >= saleEndTime, "Sale end time not reached");
        uint256 remainingTokens = maxMintable - totalMinted;
        if (remainingTokens > 0) {
            Token.transferTokens(creator, remainingTokens);
            totalMinted += remainingTokens;
        }
        isFinalized = true;
        isFunding = false;
    }


    function addToWhitelist(address[] calldata addresses) external onlyCreator {
        for (uint256 i = 0; i < addresses.length; i++) {
            whitelist[addresses[i]] = true;
        }
    }


    function removeFromWhitelist(address[] calldata addresses) external onlyCreator {
        for (uint256 i = 0; i < addresses.length; i++) {
            whitelist[addresses[i]] = false;
        }
    }


    function addToBlacklist(address[] calldata addresses) external onlyCreator {
        for (uint256 i = 0; i < addresses.length; i++) {
            blacklist[addresses[i]] = true;
        }
    }


    function removeFromBlacklist(address[] calldata addresses) external onlyCreator {
        for (uint256 i = 0; i < addresses.length; i++) {
            blacklist[addresses[i]] = false;
        }
    }


    function isWhitelisted(address _address) public view returns (bool) {
        return whitelist[_address];
    }


    function isBlacklisted(address _address) public view returns (bool) {
        return blacklist[_address];
    }
}