Ive designed a network (giacomo vetted it) that does exactly this and the ideas can easily be merged on Nostr. You can read about it here:

GitHub

GitHub - baumbit/treebit

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Isn’t that exactly how nostr works though? Relays are like nodes, notes are like transactions in the mempool? As long as there are enough nodes/relays it’s difficult/impossible to shutdown the whole network. Right?