contract Token {

    /// @return total amount of tokens
    function totalSupply() public view returns (uint256);

    /// @param owner The address from which the balance will be retrieved
    /// @return The balance
    function balanceOf(address owner) public view returns (uint256);

    /// @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) public returns (bool);

    /// @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) public returns (bool);

    /// @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) public returns (bool);

    /// @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) public view returns (uint256);

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    
}
function transfer(address to, uint256 value) public returns (bool);

/// @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