Conclusion
The Lightning Network would not exist without Bitcoin’s Nakamoto Consensus Blockchain because users would not have a place to store the bundled proof of their off-chain transactions.
Just like how users bundle all those Lightning transactions and put a small proof in the blockchain, we’re going to bundle up all the Nostr data and put a small proof in the blockchain. Instead of providing instant payments like Lightning does on Layer 2, it may be able to provide data storage on Layer 2 without the horrible security risks of shady side-chains.
It’s the same methodology as Lightning, with Bitcoin’s Nakamoto Consensus Blockchain at Layer 1 and Nostr+ZKCSP Lightning on Layer 2.