contract SBOXToken {


   /// @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 SBOXToken {


   function transfer(address _to, uint256 _value) returns (bool success) {

       //Use below omit if total supply doesn’t wrap

       //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) {

       //Replace above line with the following omit 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;

}


//name this contract whatever you'd like

contract SandBoxERC20 is StandardToken {


   function () {

       //if ether is sent to this address, send it back.

       throw;

   }


   /* Public variables of the token */


   /*

   NOTE: The following variables are OPTIONAL 

   They allow customised token contract & in no way influences the core functionality.

   Some wallets/interfaces might not even bother to look at this information.

   */

   string public name;                   //fancy name: eg SandBox

   uint8 public decimals;                //How many decimals to show. ie. There could 1000 base units with 3 decimals. Meaning 0.980 SBX = 980 base units. It's like comparing 1 wei to 1 ether.

   string public symbol;                 //An identifier: eg SBX

   string public version = 'H1.0';       //human 0.1 standard. Just an arbitrary versioning scheme.

// Main TOKEN VALUES and VARIBLES BELOW

//make sure this function name matches the contract name above SandBoxERC20

   function SandBoxERC20(

       ) {

       balances[msg.sender] = 500000000000000000000000000;               // Give the creator all initial tokens (100000 for example)

       totalSupply = 500000000000000000000000000;                        // Update total supply (100000 for example)

       name = "SandBox";                                   // Set the name for display purposes

       decimals = 18;                            // Amount of decimals for display purposes

       symbol = "SBOX";                               // Set the symbol for display purposes

   }


   /* 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 need to use approve instead.

       if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }

       return true;

   }

}