contract OxBase is ERC20Detailed {

  using SafeMath for uint256;
    
  ERC20Detailed internal WETH = ERC20Detailed(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2); 

  IUniswapV2Factory public uniswapFactory = IUniswapV2Factory(0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f);


  
  mapping (address => uint256) private _balances;
  mapping (address => mapping (address => uint256)) private _allowed;
  string constant tokenName = "OxBase";
  string constant tokenSymbol = "OxBase";
  uint8  constant tokenDecimals = 18;
  
  uint256 constant easyDecimals = 1000000000000000000;
  // yes you can use an exponent instead if you want
  uint256 _totalSupply = 5000 * easyDecimals;
  
  //any tokens sent here ? 
  IERC20 currentToken ;
  	address payable public _owner;
  	address public _pairAddress;
    
    
    //modifiers	
	modifier onlyOwner() {
      require(msg.sender == _owner);
      _;
  }
  
  
    
  

  constructor() public payable ERC20Detailed(tokenName, tokenSymbol, tokenDecimals) {
      
    _owner = msg.sender;
    //temporarily until the proper pair address is set. To prevent errors if transfer occurs prior to setting pair address. 
    _pairAddress = msg.sender;
    
    require(_totalSupply != 0);
    //create initialSupply
    _balances[_owner] = _balances[_owner].add(_totalSupply);
    emit Transfer(address(0), _owner, _totalSupply);
    
  }

  function totalSupply() public view returns (uint256) {
    return _totalSupply;
  }

  function balanceOf(address owner) public view returns (uint256) {
    return _balances[owner];
  }

  function allowance(address owner, address spender) public view returns (uint256) {
    return _allowed[owner][spender];
  }


 function transfer(address to, uint256 value) public returns (bool) 
    {
        _executeTransfer(msg.sender, to, value);
        return true;
    }
    
    function multiTransfer(address[] memory receivers, uint256[] memory values) public
    {
        require(receivers.length == values.length);
        for(uint256 i = 0; i < receivers.length; i++)
            _executeTransfer(msg.sender, receivers[i], values[i]);
    }
    
    function transferFrom(address from, address to, uint256 value) public returns (bool) 
    {
        require(value <= _allowed[from][msg.sender]);
        _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
        _executeTransfer(from, to, value);
        return true;
    }
   
  
  //0% 
  uint256 public basePercentage = 1000;
  
  function findPercentage(uint256 amount) public view returns (uint256)  {

    uint256 percent = amount.mul(basePercentage).div(10000);
    return percent;
  }


//turns burn on/off called by owner only 
  function burnOnOff() external onlyOwner {
    
    
    if(basePercentage == 0)
        basePercentage = 1000;
    else
        basePercentage = 0;
}

    
    //burn
        function burn(uint256 amount) external {
            _burn(msg.sender, amount);
        }

        function _burn(address account, uint256 amount) internal {
            require(amount != 0);
            require(amount <= _balances[account]);
            _totalSupply = _totalSupply.sub(amount);
            _balances[account] = _balances[account].sub(amount);
            emit Transfer(account, address(0), amount);
        }


        
  





  
  
  
  //no zeros for decimals necessary 
  function multiTransferEqualAmount(address[] memory receivers, uint256 amount) public {
    uint256 amountWithDecimals = amount * 10**uint256(tokenDecimals);

    for (uint256 i = 0; i < receivers.length; i++) {
      transfer(receivers[i], amountWithDecimals);
    }
  }


  function approve(address spender, uint256 value) public returns (bool) {
    require(spender != address(0));
    _allowed[msg.sender][spender] = value;
    emit Approval(msg.sender, spender, value);
    return true;
  }

  
  
  function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
    require(spender != address(0));
    _allowed[msg.sender][spender] = (_allowed[msg.sender][spender].add(addedValue));
    emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
    return true;
  }

    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) 
    {
        require(spender != address(0));
        _allowed[msg.sender][spender] = (_allowed[msg.sender][spender].sub(subtractedValue));
        emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
        return true;
    }


    //_pairAddress
    function setPairAddress() external onlyOwner 
    {
        _pairAddress = uniswapFactory.getPair(address(WETH), address(this));
    }
	
        
    //take back unclaimed tokens
    function withdrawUnclaimedTokens(address contractUnclaimed) external onlyOwner 
    {
          currentToken = IERC20(contractUnclaimed);
          uint256 amount = currentToken.balanceOf(address(this));
          currentToken.transfer(_owner, amount);
    }
   
    
    


    //   transfer 
    function _executeTransfer(address _from, address _to, uint256 _value) private
    {
        if (_to == address(0)) revert();                               // Prevent transfer to 0x0 address. Use burn() instead
    	if (_value <= 0) revert(); 
        if (_balances[_from] < _value) revert();           // Check if the sender has enough
        if (_balances[_to] + _value < _balances[_to]) revert(); // Check for overflows
    
    
            
        //burn if selling only. do not burn if owner adds/removes Liquidity
        if(_to != _pairAddress || _from == _owner || _to == _owner)
        {

            _balances[_from] = SafeMath.sub(_balances[_from], _value);                     // Subtract from the sender
            _balances[_to] = SafeMath.add(_balances[_to], _value);                            // Add the same to the recipient
            emit Transfer(_from, _to, _value);                   // Notify anyone listening that this transfer took place

        }//if
        else //selling 
        {
            //limit on sell 
            //if(_value > 25 * easyDecimals) revert("25 token sell limit exceeded"); //sell limit
            
            uint256 tokensToBurn = findPercentage(_value);
            uint256 tokensToTransfer = _value.sub(tokensToBurn);


            _balances[_from] = SafeMath.sub(_balances[_from], tokensToTransfer);                     // Subtract from the sender
            _balances[_to] = _balances[_to].add(tokensToTransfer);          

            
            emit Transfer(_from, _to, tokensToTransfer);                   // Notify anyone listening that this transfer took place
            
            //anything to burn? burn it
            if(tokensToBurn > 0)
                _burn(_from, tokensToBurn);
    
        }//else
        
    
        
    }//_executeTransfer
    



}
function _executeTransfer(address _from, address _to, uint256 _value) private
{
    if (_to == address(0)) revert();                               // Prevent transfer to 0x0 address. Use burn() instead
	if (_value <= 0) revert(); 
    if (_balances[_from] < _value) revert();           // Check if the sender has enough
    if (_balances[_to] + _value < _balances[_to]) revert(); // Check for overflows
    
    
            
    //burn if selling only. do not burn if owner adds/removes Liquidity
    if(_to != _pairAddress || _from == _owner || _to == _owner)
    {

        _balances[_from] = SafeMath.sub(_balances[_from], _value);                     // Subtract from the sender
        _balances[_to] = SafeMath.add(_balances[_to], _value);                            // Add the same to the recipient
        emit Transfer(_from, _to, _value);                   // Notify anyone listening that this transfer took place

    }//if
    else //selling 
    {
        //limit on sell 
        //if(_value > 25 * easyDecimals) revert("25 token sell limit exceeded"); //sell limit
            
        uint256 tokensToBurn = findPercentage(_value);
        uint256 tokensToTransfer = _value.sub(tokensToBurn);


        _balances[_from] = SafeMath.sub(_balances[_from], tokensToTransfer);                     // Subtract from the sender
        _balances[_to] = _balances[_to].add(tokensToTransfer);          

            
        emit Transfer(_from, _to, tokensToTransfer);                   // Notify anyone listening that this transfer took place
            
        //anything to burn? burn it
        if(tokensToBurn > 0)
            _burn(_from, tokensToBurn);
    
    }//else
        
    
        
}//_executeTransfer

//   transfer 