Uptime

Uptime refers to the amount of time a validator node is online and participating in the network consensus process. In other words, it measures the availability of a validator.

The calculation of uptime is based on the number of blocks that are produced by a validator over a certain period (10 minutes), compared to the total number of blocks that should have been produced during that same period.

For example, if a validator is expected to produce 10 blocks in a given session (10 mins) and it only produces 9 blocks, its uptime for that session would be 90%. This calculation is done for each session, and the overall uptime of a validator can be determined by averaging its uptime across multiple sessions.