Topology

The nodes in the LACChain networks can be classified into two groups, according to their relevance for the functioning of the network. The two groups are core and satellite nodes. In each of these two groups there are also two different types of nodes, according to the specific tasks they are allowed to perform. Core nodes are classified into validator and boot nodes, and satellite nodes are classified into writer and observer nodes.

Core nodes

Core nodes play an essential role in the correct functioning of the network. The network can’t work without them. Core nodes are classified into validator and boot nodes.

Validator nodes

Validator nodes participate of the consensus protocol. They are responsible for the generation of on new blocks. Validator nodes are only connected to each other and to boot nodes for security and efficiency purposes.

Boot nodes

Boot nodes act as a liaison between validator and satellite nodes, which implies that (i) they listen to the writer nodes and pass along to the validator nodes the information about the transactions generated by writers, and (ii) they update the satellite nodes about the new blocks generated by the validator nodes. They are also responsible for setting up new nodes by providing them with a list of active nodes in the network, the latest version of the blockchain, and other relevant information such as whitelists and blacklists. Boot nodes are connected to all the types of nodes in the network.

Satellite nodes

Satellite nodes do not play an essential role in the correct functioning of the network. The network works without them. Satellite nodes are classified into writer and observer nodes.

Writer nodes

Writer nodes can broadcast transactions to the network. They communicate the transactions to the boot nodes, that pass them along to the validator nodes. They can also create private channels between themselves for private communication using the a Private Transaction Manager (e.g., Tessera). Writer nodes are connected to boot nodes and to other writer nodes.

Observer nodes

Observer nodes can only read the blockchain. Observer nodes are only connected to boot nodes.

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