// File: Context.sol



/**
 *Submitted for verification at Etherscan.io on 2022-07-29
*/

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.14;

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: IERC20.sol



/**
 *Submitted for verification at Etherscan.io on 2022-07-29
*/

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.14;

/**
 * Interface of the standard ERC20 as defined in the EIP.
 */
interface IERC20 {
    /**
     * 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);

    /**
     * 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);

    /**
     * Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * Moves `amount` 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 amount) external returns (bool);

    /**
     * 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);

    /**
     * Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` 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 amount
    ) external returns (bool);
}

// File: IERC20Metadata.sol



/**
 *Submitted for verification at Etherscan.io on 2022-07-29
*/

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.14;

import "./IERC20.sol";

/**
 * Interface for the optional metadata functions from the ERC20 standard.
 *
 */
interface IERC20Metadata is IERC20 {
    /**
     * Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// File: Mactivas.sol



/**
 *Submitted for verification at Etherscan.io on 2022-07-29
*/

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.14;

import "./IERC20.sol";
import "./IERC20Metadata.sol";
import "./Context.sol";
import "./Ownable.sol";

contract Mactivas is Context, IERC20, IERC20Metadata, Ownable {

    string public _name = "Mactivas";
    string public _symbol = "MACT";
    uint8 public decimals = 18;
    uint256 public _totalSupply = 500000000000000000000000000;

    address private _owner;

    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    
    constructor() {
        _balances[msg.sender] = _totalSupply;
    }
 
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    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);
    }

    /**
     * Burn or Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */

    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }

    function burnFrom(address account, uint256 amount) public virtual {
        _spendAllowance(account, _msgSender(), amount);
        _burn(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 {}

}

// File: Msale.sol



/**
 *Submitted for verification at Etherscan.io on 2022-07-29
*/

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.14;

import "./Mactivas.sol";
import "./Ownable.sol";
import "./Pausable.sol";

contract Msale is Pausable, Ownable {
    string public name = "Msale";
    Mactivas public mact;
    uint256 public rate = 35000;
    address private _owner;
    bool private _paused;

    event Buy(address account, address mact, uint256 amount, uint256 rate);

    constructor(
        Mactivas _mact) {
        mact = _mact;
        _owner = msg.sender;
        _paused = false;
    }

    function buy() public payable {
        uint256 mactAmount = msg.value * rate;
        require(mact.balanceOf(address(this)) >= mactAmount);

        mact.transfer(msg.sender, mactAmount);
        emit Buy(msg.sender, address(mact), mactAmount, rate);
    }

    function withdraw(address payable _to) public onlyOwner {
        require(_owner == msg.sender, "You cannot call this function.");
        _to.transfer(address(this).balance);
    }

    function pause() public onlyOwner {
        _pause();
    }

    function unpause() public onlyOwner {
        _unpause();
    }
}

// File: Ownable.sol



/**
 *Submitted for verification at Etherscan.io on 2022-07-29
*/

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.14;

import "./Context.sol";

abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor() {
        _transferOwnership(_msgSender());
    }
  
    function owner() public view virtual returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        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);
    }
}

// File: Pausable.sol



/**
 *Submitted for verification at Etherscan.io on 2022-07-29
*/

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.14;

import "./Context.sol";

abstract contract Pausable is Context {
   
    event Paused(address account);
    event Unpaused(address account);

    bool private _paused;

    constructor() {
        _paused = false;
    }

    function paused() public view virtual returns (bool) {
        return _paused;
    }

    modifier whenNotPaused() {
        require(!paused(), "Pausable: paused");
        _;
    }

    modifier whenPaused() {
        require(paused(), "Pausable: not paused");
        _;
    }
  
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}