We provide a solution for high availability of Proof-of-Stake validators on light infrastructure. If the validator node goes down, another node from the federation takes the relay.

We use DAppNode Packages et hardwares as a root base for the solution. We built a daemon Archipel Orchestrator. This daemon is running on each validator nodes. It interacts with the a smart contract to manage the validator leadership mutex. There is also a ping between nodes and an algorithm to choose when to start, stop validating.

The chain node desynchronization may leads to unwanted state. In the final solution for the mutex between nodes, we will use a lightweight mutex, not with smart contract but rather a specific substrate module or just a use of libp2p module or zookeeper solution like.