Fast Sync Support for Domains

[jfrank-summit]

Support fast sync of the state from a state root commitment (checkpoint) stored on the system domain registry. This will likely modify or extend the warp sync mechanism already included with Substrate. Once implemented this will be the default sync mechanism for new operators who join the domain subnet. This assumes there is at least one honest and live operator available, if not use the fallback naive sync.

[rahulksnv]

Hi @jfrank-summit @vedhavyas what is the status on this? Since I recently worked on upstream sync issues, can start looking at this if this is still important.

[jfrank-summit]

This is not required for mainnet beta and I am not sure if the work you did upstream would be helpful here. @vedhavyas thoughts?

[vedhavyas]

We would definitely require this for domain nodes to sync from other domain nodes rather than deriving the domain blocks from the consensus blocks. We do not have any specific discussion on how to approach this since this involves network for domains and maybe other things I might have missed. This is not a highest priority since we do not plan to have this for mainnet beta.

[dariolina]

Closing in favor of #2616 as duplicate