contract ERC20Protocol {
        /* This is a slight change to the ERC20 base standard.
        function totalSupply() constant returns (uint supply);
        is replaced with:
        uint public totalSupply;
        This automatically creates a getter function for the totalSupply.
        This is moved to the base contract since public getter functions are not
        currently recognised as an implementation of the matching abstract
        function by the compiler.
        */
        /// total amount of tokens
        uint public totalSupply;

        /// @param _owner The address from which the balance will be retrieved
        /// @return The balance
        function balanceOf(address _owner) constant public returns (uint 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, uint _value) public 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, uint _value) public returns (bool success);

        /// @notice `msg.sender` approves `_spender` to spend `_value` tokens
        /// @param _spender The address of the account able to transfer the tokens
        /// @param _value The amount of tokens to be approved for transfer
        /// @return Whether the approval was successful or not
        function approve(address _spender, uint _value) public 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 public returns (uint remaining);

        event Transfer(address indexed _from, address indexed _to, uint _value);
        event Approval(address indexed _owner, address indexed _spender, uint _value);
    }
function allowance(address _owner, address _spender) constant public returns (uint remaining);

/// @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