Penalties and eviction for inactive Peers

[mikera]

There is a need for penalties / mechanisms for removing inactive Peers from the network. The main objectives are:

• Prevents risks to consensus progress if less than 67% of Peers are participating correctly
• Ensure good incentives for Peers to maintain security and availability at all times

Mechanisms discussed in various design calls:

• Small % penalty on stake over time if Peers fail to participate regularly
• Eviction of Peers that have insufficient stake or participation
• Participation of Peers necessary to claim share of rewards

Note: Peers undergoing temporary disruption are recommended to implement measures to withdraw stake if they are unable to recover quickly to avoid being subject to such penalties.

[mikera]

Recent changes in develop include rejecting Blocks from Peers with insufficient stake