pragma solidity ^0.4.8;

contract Token {

    // @return total amount of tokens
    function totalSupply() constant returns (uint256 supply) {}

    // @param _owner The address from which the balance will be retrieved
    // @return The balance
    function balanceOf(address _owner) constant returns (uint256 balance) {}

    // @notice send `_value` token to `_to` from `msg.sender`
    // @param _to The address of the recipient
    // @param _value The amount of token to be transferred
    // @return Whether the transfer was successful or not
    function transfer(address _to, uint256 _value) returns (bool success) {}

    // @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
    // @param _from The address of the sender
    // @param _to The address of the recipient
    // @param _value The amount of token to be transferred
    // @return Whether the transfer was successful or not
    function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}

    // @notice `msg.sender` approves `_addr` to spend `_value` tokens
    // @param _spender The address of the account able to transfer the tokens
    // @param _value The amount of wei to be approved for transfer
    // @return Whether the approval was successful or not
    function approve(address _spender, uint256 _value) returns (bool success) {}

    // @param _owner The address of the account owning tokens
    // @param _spender The address of the account able to transfer the tokens
    // @return Amount of remaining tokens allowed to spent
    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 StandardToken is Token {

    function transfer(address _to, uint256 _value) returns (bool success) {
        //Default assumes totalSupply can't be over max (2^256 - 1).
        //If your token leaves out totalSupply and can issue more tokens as time goes on, you need to check if it doesn't wrap.
        //Replace the if with this one instead.
        //if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
        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) {
        //same as above. Replace this line with the following if you want to protect against wrapping uints.
        //if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
        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];
    }

    mapping (address => uint256) balances;
    mapping (address => mapping (address => uint256)) allowed;
    uint256 public totalSupply;
}


contract BaconCoin is StandardToken {

	string public name = "BaconCoin";
	string public symbol = "BAK";
	uint public decimals = 8;
	uint public INITIAL_SUPPLY = 2200000000 * (10 ** decimals);

	function BaconCoin() public {
		totalSupply = INITIAL_SUPPLY;
		balances[msg.sender] = INITIAL_SUPPLY;
	}

    /* Approves and then calls the receiving contract */
    function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);

        //call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn't have to include a contract in here just for this.
        //receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
        //it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
        if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }
        return true;
    }
}