pragma solidity ^0.4.4;

 

contract Token {

    function totalSupply() constant returns (uint256 supply) {}

 

    function balanceOf(address _owner) constant returns (uint256 balance) {}

 

    function transfer(address _to, uint256 _value) returns (bool success) {}

 

    function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}

 

    function approve(address _spender, uint256 _value) returns (bool success) {}

 

    function allowance(address _owner, address _spender) constant returns (uint256 remaining) {}

 

    event Transfer(address indexed _from, address indexed _to, uint256 _value);

    event Approval(address indexed _owner, address indexed _spender, uint256 _value);

 

}

 

contract HashgainsToken is Token {

 

 

    string public name;              

    uint8 public decimals;               

    string public symbol;                

    string public version = 'H1.0';

    uint256 public unitsOneEthCanBuy;    

    uint256 public totalEthInWei;        

    address public fundsWallet; 

    mapping (address => uint256) balances;

    mapping (address => mapping (address => uint256)) allowed;

    uint256 public totalSupply;

   

    function transfer(address _to, uint256 _value) returns (bool success) {

        if (balances[msg.sender] >= _value && _value > 0) {

            balances[msg.sender] -= _value;

            balances[_to] += _value;

            Transfer(msg.sender, _to, _value);

            return true;

        } else { return false; }

    }

 

    function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {

         if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {

            balances[_to] += _value;

            balances[_from] -= _value;

            allowed[_from][msg.sender] -= _value;

            Transfer(_from, _to, _value);

            return true;

        } else { return false; }

    }

 

    function balanceOf(address _owner) constant returns (uint256 balance) {

        return balances[_owner];

    }

 

    function approve(address _spender, uint256 _value) returns (bool success) {

        allowed[msg.sender][_spender] = _value;

        Approval(msg.sender, _spender, _value);

        return true;

    }

 

    function allowance(address _owner, address _spender) constant returns (uint256 remaining) {

      return allowed[_owner][_spender];

    }

 

  

    function HashgainsToken() {

        balances[msg.sender] = 50000000000000000000000000;              

        totalSupply = 50000000000000000000000000;                       

        name = "HashgainsToken";                                   

        decimals = 18;                                              

        symbol = "HGS";                                            

        unitsOneEthCanBuy = 1000;                                  

        fundsWallet = msg.sender;                                  

    }

 

    function() payable{

        totalEthInWei = totalEthInWei + msg.value;

        uint256 amount = msg.value * unitsOneEthCanBuy;

        if (balances[fundsWallet] < amount) {

            return;

        }

 

        balances[fundsWallet] = balances[fundsWallet] - amount;

        balances[msg.sender] = balances[msg.sender] + amount;

 

        Transfer(fundsWallet, msg.sender, amount);

        fundsWallet.transfer(msg.value);                               

    }

    function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {

        allowed[msg.sender][_spender] = _value;

        Approval(msg.sender, _spender, _value);

 

        if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }

        return true;

    }

   

    

}