There are several types of messages with two main classes: The System (ADDBFT) and the Synchronization. The system type has limits which must have the following: Height of previous and proposed P-Block, peaq hash, DB hash. The synchronization is mostly used to get information and/or status from the network. Based on P-Node type and stage in Rd, Nd uses the previously given system key for signing message. For each type of message delay is defined based on message type.