This research paper could be useful for application in tendermint-based sidechains.
A new PoS protocol based on the concept of a tontine. It extends Tendermint’s PoS protocol to enforce a monitoring system to find out cheaters by offering increased gains on catching them. The payout for catching a cheater in the Tendermint system decreases as the validators pool expands. The cost of monitoring the system compared to the returns in-turn is high. TontineCoin’s protocol keeps a validator strongly motivated to check for a cheating validator since it is in their
benefit to do so. It is described as murder-based due to its similarity with the nature of tontine.