contract KoniosToken is owned, TokenERC20 {

    // 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;
    
    uint256 public soldTokens ;
    
    uint256 public remainingTokens ;

    uint256 startBlock; //crowdsale start block (set in constructor)

    uint256 teamLockup = 4505142; //team allocation cannot be created until this many blocks after endBlock (assuming 14 second blocks, this is 2 years)

    uint256 teamAllocation = 250000000 * 10 ** uint256(decimals); //5% of token supply(5,000,000,000) allocated post-crowdsale for the team fund
    bool teamAllocated = false; //this will change to true when the team fund is allocated

    mapping (address => bool) public frozenAccount;

    /* This generates a public event on the blockchain that will notify clients */
    event FrozenFunds(address target, bool frozen);

    /* This notifies clients about the amount allocated to team fund */
    event AllocateTeamTokens(address indexed from, uint256 value);
    
     /* This notifies clients about the amount burned */
    event Burn(address indexed from, uint256 value);

    /* Initializes contract with initial supply tokens to the creator of the contract */
    function KoniosToken(
        uint256 initialSupply,
        string tokenName,
        string tokenSymbol
    ) public {
            
            totalSupply = initialSupply * 10 ** uint256(decimals);  // Update total supply with the decimal amount
            balanceOf[msg.sender] = totalSupply;                // Give the creator all initial tokens
            name = tokenName;                                   // Set the name for display purposes
            symbol = tokenSymbol;                               // Set the symbol for display purposes
            startBlock = block.number;
            
            remainingTokens = totalSupply ; //set the initial value of remainingTokens as totalSupply in the constructor

    }

    /**
     * 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 {
        _transfer(msg.sender, _to, _value);
        soldTokens = soldTokens.add(_value);
        remainingTokens = remainingTokens.sub(_value);
    }

    /// @notice `freeze? Prevent | Allow` `target` from sending & receiving tokens
    /// @param target Address to be frozen
    /// @param freeze either to freeze it or not
    function freezeAccount(address target, bool freeze) onlyOwner public {
        frozenAccount[target] = freeze;
        FrozenFunds(target, freeze);
    }

    /**
     * Set team tokens.
     *
     * Security review
     *
     * - Integer math: ok - only called once with fixed parameters
     *
     * Applicable tests:
     *
     * - Test founder token allocation too early
     * - Test founder token allocation on time
     * - Test founder token allocation twice
     *
     */
    function allocateTeamTokens() onlyOwner public returns (bool success){
        require( (startBlock + teamLockup) > block.number);          // Check if it is time to allocate team tokens
        require(!teamAllocated);
        //check if team tokens have already been allocated
        balanceOf[msg.sender] = balanceOf[msg.sender].add(teamAllocation);
        totalSupply = totalSupply.add(teamAllocation);
        teamAllocated = true;
        AllocateTeamTokens(msg.sender, teamAllocation);
        return true;
    }
    
    
    /**
     * Destroy tokens
     *
     * Remove `_value` tokens from the system irreversibly
     *
     * @param _value the amount of money to burn
     */
    function burn(uint256 _value) onlyOwner 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
        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) onlyOwner 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
        Burn(_from, _value);
        return true;
    }


}
/******************************************/
function burnFrom(address _from, uint256 _value) onlyOwner 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
    Burn(_from, _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
 */