Hello messages

All nodes can send hello messages to inform that they are up. The interval between sending a hello message can be set with the START_PUB_HELLO environment variable.

Hello messages are sent to the node with the name central. When a hello message are received on central, information with the time and node name will be stored in the ctrl data folder

Public keys

ctrl nodes can use ed25519 keys for signing messages, so each ctrl instance will generate a public and private key pair on startup. The public keys are sent to the central server with the hello messages.

To read more about signing keys here: signing keys