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There are 3 components to what I'm currently running:

  • Witness Server (Primary) - Uses Key 1
  • Witness Server (Backup) - Uses Key 2
  • Failover Script (Controller)

The failover script lives on a 3rd server (currently my laptop, which is always online). The script continually monitors the total_missed field on my witness account, and once it hits a certain threshold, triggers an update_witness command to update the signing key from Key 1 to Key 2.

So each of my witness servers all have unique keys, and to swap servers, I just need to issue that command on the blockchain.

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