Security Primary Chain

The security primary chain is the main chain of BigBang Core tree structure, and all its forks are its "descendants", which are used to
support the security and consensus of the whole block system. In P2P network, the priority of synchronous broadcast message forwarding of the main chain is higher than that of the application fork. In addition to recording Token transfer of the main chain, the security primary chain also retains the data of key process negotiation of EDPoS nodes.

Security primary chain blocks can not be inserted between sub-blocks, can only according to the given block interval growth. As a considerable part of the capacity records consensus negotiation process data (take 23 EDPoS nodes as an example, negotiation data will occupy about 115KB of each block), the transaction capacity of the security primary chain is lower than that of the application branch chain. The security primary chain starts from the block system creation block and generates the block through the EDPoS+CPoW consensus sequence. The security primary chain is used to support the security and consensus of the whole block system. All application fork nodes need to synchronize and verify the block header information of the main chain. After the new node is connected to the network, the main chain synchronization is completed first, and then the corresponding application fork synchronization is started.