EPIC: ICS protocol requires a lot of packets to be relayed

[mpoke]

Problem

In every block that the provider valset changes, a VSCPacket must be sent to every consumer and a corresponding VSCMaturedPacket sent back. Given that the validator powers may change very often on the provider chain (e.g., the Cosmos Hub), this approach results in a large workload for the relayers.

This EPIC is used to track the work on this issue.

Closing criteria

• A decision is reached on whether this issue is a concern.
• If the issue is a concern, a solution is implemented.

Task list

Must have

Beta Give feedback

1. Discuss whether a solution is needed (if not, close EPIC)
2. Come up with a potential solution
3. ADR describing ICS epochs #1514
   scope: docs type: feature-request +2
   
4. Add key assignment logic to Quint model #1515
   S: Productivity scope: MBT scope: testing type: feature-request +4
   
5. Add epochs to ICS protocol #1516
   7 of 7
   type: feature-request +1
   
6. update docs

Nice to have

Beta Give feedback

1. Height <-> ValsetUpdateID mapping is inefficient #718
   S: ImprovingThings source: audit type: feature-request type: tech-debt +4