Pre-HIP : Max keys + max keys per node + max keys per validator per shard + dynamic keys limitation

[RoboValidator]

Okay I started a new thread tagged with HIP-21 just to address the per shard key limit rule. I set it at 6.4% based on what we ended the thread at but feel free to push back on 10% if you think that’s better @sophoah

HIP-16: Enforce a 6.4% max key per shard limit for each validator

Summary: This proposal is for adding a max keys per shard limit for each validator. Background: Currently a large validator can dominate the voting power of a single shard by assigning all their keys to that shard. This is undesirable because for example if a shard becomes dominated by two validators with more than 1/3 voting power and they both go down for maintenance then it could stop consensus. Also if a large validator dominates a shard and proceeds to run underpowered nodes they can poss…