DOTS Client                                    DOTS Server

    ClientHello
    (0-RTT DOTS signal message)
                              -------->
                                                    ServerHello
                                          {EncryptedExtensions}
                                                     {Finished}
                              <--------   [DOTS signal message]
    (end_of_early_data)       
    {Finished}                --------> 
    [DOTS signal message]     <------->   [DOTS signal message]

Note that:
    () Indicates messages protected 0-RTT keys
    {} Indicates messages protected using handshake keys
    [] Indicates messages protected using 1-RTT keys