pragma solidity ^0.4.11;

contract Token {
    function totalSupply() constant returns(uint256 supply) {}
    function balanceOf() constant returns(uint256 balance) {}
    function transfer(address _to, uint256 _value) returns (bool success) {}
    function transfreFrom(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 EthToCoins is Token {
    
    function transfer(address _to, uint256 _value) returns (bool success) {
        require(
            balances[msg.sender] >= _value
            && _value > 0
        );
        balances[msg.sender] -= _value;
        balances[_to] += _value;
        Transfer(msg.sender, _to, _value);
        return true;
    }
    
    function transfreFrom(address _from, address _to, uint256 _value) returns (bool success) {
        require(
            allowed[_from][msg.sender] >= _value
            && balances[_from] >= _value
            && _value >0
        );
        balances[_from] -= _value;
        balances[_to] += _value;
        allowed[_from][msg.sender] = _value;
        Transfer(_from, _to, _value);
        return true;
    }
    
    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];
    }
    
    mapping(address => uint256) balances;
    mapping(address => mapping(address =>uint256)) allowed;
    uint256 public totalSupply;
}

contract SETTEST is EthToCoins {
    string public name;
    uint8 public decimals;
    string public symbol;
    uint256 public unitsOneEthCanBuy;
    uint256 public totalEthInWei;
    address public fundsWallet;
    
    function SETTEST() {
        balances[msg.sender] = 55000000000000000000000000;
        totalSupply = 55000000000000000000000000;
        name = "SETTEST";
        decimals = 18;
        symbol = "SET1";
        unitsOneEthCanBuy = 20;
        fundsWallet = msg.sender;
    }
    
    function() payable {
        totalEthInWei = totalEthInWei + msg.value;
        uint256 amount = msg.value * unitsOneEthCanBuy;
        require(balances[fundsWallet] >= amount);
        
        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, unit256, address, bytes)"))), 
        msg.sender, _value, this, _extraData)) { throw; }
            return true;
    }
    
}