// Vulnerability label: ARTHM
pragma solidity >=0.4.22 <0.6.0;
	

	contract owned {
	    address public owner;
	

	    constructor() public {
	        owner = msg.sender;
	    }
	

	    modifier onlyOwner {
	        require(msg.sender == owner);
	        _;
	    }
	

	    function transferOwnership(address newOwner) onlyOwner public {
	        owner = newOwner;
	    }
	}
	

	interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; 
	

	}
	contract BoostPax {
	    // Public variables of the token
	    string public name;
	    string public symbol;
	    uint8 public decimals = 18;
	    // 18 decimals is the strongly suggested default, avoid changing it
	    uint256 public totalSupply;
	

	    // This creates an array with all balances
	    mapping (address => uint256) public balanceOf;
	    mapping (address => mapping (address => uint256)) public allowance;
	    mapping (address => bool) public frozenAccount;
	

	    // This generates a public event on the blockchain that will notify clients
	    event Transfer(address indexed from, address indexed to, uint256 value);
	    
	    // This generates a public event on the blockchain that will notify clients
	    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
	

	    // This notifies clients about the amount burnt
	    event Burn(address indexed from, uint256 value);
	

	    /**
	     * Constructor function
	     *
	     * Initializes contract with initial supply tokens to the creator of the contract
	     */
	    constructor(
	

	    ) public {
	        totalSupply = 100000000 * 10 ** uint256(18);  // Update total supply with the decimal amount
	        balanceOf[msg.sender] = totalSupply;                    // Give the creator all initial tokens
	        name = "BoostPax";                                       // Set the name for display purposes
	        symbol = "BPX";                                   // Set the symbol for display purposes
	    }
	

	    /**
	     * Internal transfer, only can be called by this contract
	     */
	    function _transfer(address _from, address _to, uint _value) internal {
	        // Prevent transfer to 0x0 address. Use burn() instead
	        require(_to != address(0x0));
	        // Check if the sender has enough
	        require(balanceOf[_from] >= _value);
	        // Check for overflows
	        require(balanceOf[_to] + _value > balanceOf[_to]);
	        // Save this for an assertion in the future
	        uint previousBalances = balanceOf[_from] + balanceOf[_to];
	        // Subtract from the sender
	        balanceOf[_from] -= _value;
	        // Add the same to the recipient
	        balanceOf[_to] += _value;
	        emit Transfer(_from, _to, _value);
	        // Asserts are used to use static analysis to find bugs in your code. They should never fail
	        assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
	    }
	

	    /**
	     * Transfer tokens
	     *
	     * Send `_value` tokens to `_to` from your account
	     *
	     * @param _to The address of the recipient
	     * @param _value the amount to send
	     */
	    function transfer(address _to, uint256 _value) public returns (bool success) {
	        _transfer(msg.sender, _to, _value);
	        return true;
	    }
	

	    /**
	     * Transfer tokens from other address
	     *
	     * Send `_value` tokens to `_to` in behalf of `_from`
	     *
	     * @param _from The address of the sender
	     * @param _to The address of the recipient
	     * @param _value the amount to send
	     */
	    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
	        require(_value <= allowance[_from][msg.sender]);     // Check allowance
	        allowance[_from][msg.sender] -= _value;
	        _transfer(_from, _to, _value);
	        return true;
	    }
	

	    /**
	     * Set allowance for other address
	     *
	     * Allows `_spender` to spend no more than `_value` tokens in your behalf
	     *
	     * @param _spender The address authorized to spend
	     * @param _value the max amount they can spend
	     */
	    function approve(address _spender, uint256 _value) public
	        returns (bool success) {
	        allowance[msg.sender][_spender] = _value;
	        emit Approval(msg.sender, _spender, _value);
	        return true;
	    }
	

	    /**
	     * Set allowance for other address and notify
	     *
	     * Allows `_spender` to spend no more than `_value` tokens in your behalf, and then ping the contract about it
	     *
	     * @param _spender The address authorized to spend
	     * @param _value the max amount they can spend
	     * @param _extraData some extra information to send to the approved contract
	     */
	    function approveAndCall(address _spender, uint256 _value, bytes memory _extraData)
	        public
	        returns (bool success) {
	        tokenRecipient spender = tokenRecipient(_spender);
	        if (approve(_spender, _value)) {
	            spender.receiveApproval(msg.sender, _value, address(this), _extraData);
	            return true;
	        }
	    }
	

	    /**
	     * Destroy tokens
	     *
	     * Remove `_value` tokens from the system irreversibly
	     *
	     * @param _value the amount of money to burn
	     */
	    function burn(uint256 _value) public returns (bool success) {
	        require(balanceOf[msg.sender] >= _value);   // Check if the sender has enough
	        balanceOf[msg.sender] -= _value;            // Subtract from the sender
	        totalSupply -= _value;                      // Updates totalSupply
	        emit Burn(msg.sender, _value);
	        return true;
	    }
	
	    /**
	     * Destroy tokens from other account
	     *
	     * Remove `_value` tokens from the system irreversibly on behalf of `_from`.
	     *
	     * @param _from the address of the sender
	     * @param _value the amount of money to burn
	     */
	    function burnFrom(address _from, uint256 _value) public returns (bool success) {
	        require(balanceOf[_from] >= _value);                // Check if the targeted balance is enough
	        require(_value <= allowance[_from][msg.sender]);    // Check allowance
	        balanceOf[_from] -= _value;                         // Subtract from the targeted balance
	        allowance[_from][msg.sender] -= _value;             // Subtract from the sender's allowance
	        totalSupply -= _value;                              // Update totalSupply
	        emit Burn(_from, _value);
	        return true;
	    }
	}