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1. Every node will hold 2 sets of peer-connections: validators and unprivileged peers.
2. Every validating node is trying to connect to every other validating node (for current round/epoch).
3. Using iroha_schema SCALE codec for serialization, not CBOR.
4. Using proposed encryption: Diffie-Hellman hand-shakes based on Elliptic Curves (x25519) and encrypting messages by ChaCha20Poly1305, the Ursa has all primitives for it. No one was against adding some garbage to handshakes.
5. Trusted peers set is not the same as validators. Trusted peers can be different for each node and it means that this set can be used as a bootstrap. But validators should be encoded in the genesis block and later added with AddPeer.

Alternatives

I think the alternative would be using libp2p, but it doesn't give such flexibility, encryption and robustness as using bare sockets and mio, for example. Do we need the DHT anyway?

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