Agoral on Nostr: There are many protocols that allow for secure community chats...we dont have to go ...

There are many protocols that allow for secure community chats...we dont have to go far for a firt solution...you can for example utilize private nostr relays..

When it comes to decentralized way how to verify that the chat/database is in sync with other nodes (your example of some1 deleting msgs as you stated in your example) its tougher

You have to hash the current consensual state of the database into an immutable decentralized database (hello BTC) and client-validate the state of that database to the hash created during the last "consensual tick"

Again there are multiple ways to solve this problem but we think that so far the best solution is provided by RGB a 2nd layer of BTC...every community is a smart contract stored ofchain...evry invited participating node is a co-contract bearer reaponsible for creating consensus on about the current state and client-validating other participating nodes

Anyway the protocolar solution to you mentioned problem is somethin we are inherently working on with our agora project that i told you about before