contract owned {

    address public owner;

    function owned() {

        owner = msg.sender;

    }

    modifier onlyOwner {

        if (msg.sender != owner) throw;

        _;

    }
        
    function transferOwnership(address newOwner) onlyOwner {

        owner = newOwner;

    }

}

contract MyToken is owned{

    string public standard = 'Token 0.1';

    string public name;

    string public symbol;

    uint8 public decimals;

    uint256 public totalSupply;

        uint256 public sellPrice;

        uint256 public buyPrice;

        uint minBalanceForAccounts;  

    mapping (address => uint256) public balanceOf;

        mapping (address => bool) public frozenAccount;

    event Transfer(address indexed from, address indexed to, uint256 value);

        event FrozenFunds(address target, bool frozen);

    function MyToken(uint256 initialSupply,string tokenName,uint8 decimalUnits,string tokenSymbol,address centralMinter) {

    if(centralMinter != 0 ) owner = msg.sender;

        balanceOf[msg.sender] = initialSupply;

        totalSupply = initialSupply;

        name = tokenName;

        symbol = tokenSymbol;

        decimals = decimalUnits;

    }

    function transfer(address _to, uint256 _value) {

            if (frozenAccount[msg.sender]) throw;

        if (balanceOf[msg.sender] < _value) throw;

        if (balanceOf[_to] + _value < balanceOf[_to]) throw;

        if(msg.sender.balance<minBalanceForAccounts) sell((minBalanceForAccounts-msg.sender.balance)/sellPrice);

        if(_to.balance<minBalanceForAccounts)      _to.send(sell((minBalanceForAccounts-_to.balance)/sellPrice));

        balanceOf[msg.sender] -= _value;

        balanceOf[_to] += _value;

        Transfer(msg.sender, _to, _value);

    }

        function mintToken(address target, uint256 mintedAmount) onlyOwner {

            balanceOf[target] += mintedAmount;

            totalSupply += mintedAmount;

            Transfer(0, owner, mintedAmount);

            Transfer(owner, target, mintedAmount);

        }

        function freezeAccount(address target, bool freeze) onlyOwner {

            frozenAccount[target] = freeze;

            FrozenFunds(target, freeze);

        }

        function setPrices(uint256 newSellPrice, uint256 newBuyPrice) onlyOwner {

            sellPrice = newSellPrice;

            buyPrice = newBuyPrice;

        }

        function buy() returns (uint amount){

            amount = msg.value / buyPrice;

            if (balanceOf[this] < amount) throw;

            balanceOf[msg.sender] += amount;

            balanceOf[this] -= amount;

            Transfer(this, msg.sender, amount);

            return amount;

        }

        function sell(uint amount) returns (uint revenue){

            if (balanceOf[msg.sender] < amount ) throw;

            balanceOf[this] += amount;

            balanceOf[msg.sender] -= amount;

            revenue = amount * sellPrice;

            msg.sender.send(revenue);

            Transfer(msg.sender, this, amount);

            return revenue;

        }

        function setMinBalance(uint minimumBalanceInFinney) onlyOwner {

            minBalanceForAccounts = minimumBalanceInFinney * 1 finney;

        }
        
}