Package balance provides an onion layer message that comes in response to a getbalance query, informing the client of the balance of a session, identified by the getbalance nonce.ID.

Package confirmation provides an onion message type that simply returns a confirmation for an associated nonce.ID of a previous message that we want to confirm was received.

Package end is a null tombstone type onion message that indicates there is no more data in the onion (used with encoding only).

Package response provides a message type in response to an Exit message.