chips

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

contract MyToken is owned {
    /* Public variables of the token */
    string public name;
    string public symbol;
    uint8 public decimals;
    uint256 public totalSupply;
    address public house;
    uint256 public housemax;
    uint32 public odds;
    uint256 public sellprice;

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

    /* This generates a public event on the blockchain that will notify clients */
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Deposit(address _from, uint value);

    /* Initializes contract with initial supply tokens to the creator of the contract */
    function MyToken(
        uint256 initialSupply,
        string tokenName,
        uint8 decimalUnits,
        string tokenSymbol,
        uint newHouseMax,
        uint32 newOdds,
        address newHouse,
        uint32 SalePrice


        ) {
        balanceOf[this] = initialSupply;              // Give the creator all initial tokens
        totalSupply = initialSupply;                        // Update total supply
        name = tokenName;                                   // Set the name for display purposes
        symbol = tokenSymbol;                               // Set the symbol for display purposes
        decimals = decimalUnits;                            // Amount of decimals for display purposes
        house = newHouse;
        housemax = newHouseMax;
        odds = newOdds;
        sellprice = SalePrice;

    }

   function multiBlockRandomGen(uint seed, uint size) constant returns (uint randomNumber) {
        uint n = 0;
        for (uint i = 0; i < size; i++){
            if (uint(sha3(block.blockhash(block.number-i-1), seed ))%2==0)
                n += 2**i;
        }
        return n;
    }

    /* Send coins */
    function transfer(address _to, uint256 _value) {
        if (balanceOf[msg.sender] < _value) throw;           // Check if the sender has enough
        if (balanceOf[_to] + _value < balanceOf[_to]) throw; // Check for overflows
        balanceOf[msg.sender] -= _value;                     // Subtract from the sender
        balanceOf[_to] += _value;                            // Add the same to the recipient
        Transfer(msg.sender, _to, _value);                   // Notify anyone listening that this transfer took place
    }

    /* Allow another contract to spend some tokens in your behalf */
    function approveAndCall(address _spender, uint256 _value, bytes _extraData)
        returns (bool success) {
        allowance[msg.sender][_spender] = _value;
        tokenRecipient spender = tokenRecipient(_spender);
        spender.receiveApproval(msg.sender, _value, this, _extraData);
        return true;
    }

    /* A contract attempts to get the coins */
    function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
        if (balanceOf[_from] < _value) throw;                 // Check if the sender has enough
        if (balanceOf[_to] + _value < balanceOf[_to]) throw;  // Check for overflows
        if (spentAllowance[_from][msg.sender] + _value > allowance[_from][msg.sender]) throw;   // Check allowance
        balanceOf[_from] -= _value;                          // Subtract from the sender
        balanceOf[_to] += _value;                            // Add the same to the recipient
        spentAllowance[_from][msg.sender] += _value;
        Transfer(_from, _to, _value);
        return true;
    }

    function setMax(uint256 newHouseMax) onlyOwner {
        housemax = newHouseMax;
    }
    function setHouse(address newHouse) onlyOwner {
        house = newHouse;
    }

    function setOdds(uint32 newOdds) onlyOwner {
        if (newOdds <= 512) throw;
        odds = newOdds;
    }

    function buy() returns (uint256 amount) {
        uint256 amountOfTokens;
        uint256 amountOfTokenfees;
        amount = msg.value;
        if (amount > housemax) throw;
        sellprice = (this.balance / totalSupply);

        uint rnd = multiBlockRandomGen(uint(sha3(block.number, now, amount)), 10);

            if (rnd >= odds) {
                amountOfTokens = (amount * 0) / 100000000000;
                amountOfTokenfees = ((amount * 1) / 100000000000)/ 999;
            }
            if (rnd < odds) {
                amountOfTokens = (amount * 2) / 100000000000;
             }

        balanceOf[msg.sender] += amountOfTokens;
        balanceOf[house] += amountOfTokenfees;
        balanceOf[this] -= amountOfTokens + amountOfTokenfees;

        Transfer(this, msg.sender, amountOfTokens);
        Transfer(this, house, amountOfTokenfees);

        return amount;

        }

      function sell(uint256 amount) returns (uint revenue) {
            sellprice = (this.balance / totalSupply);
            if (balanceOf[msg.sender] < amount ) throw;        // checks if the sender has enough to sell
            balanceOf[this] += amount;                         // adds the amount to owner's balance
            balanceOf[msg.sender] -= amount;                   // subtracts the amount from seller's balance
            revenue = (amount / 100000000000) * sellprice;                      // calculate the revenue
            msg.sender.send(revenue);                          // sends ether to the seller
            Transfer(msg.sender, this, amount);                // executes an event reflecting on the change
            return revenue;
        }
}