bip324 implementation #161
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[DISCLAIMER]
This proposal needs bitcoin version 0.32.5 to work. That is why I have created this PR: #160 containing all the needed changes.
My proposal is primarily located in the reactor component. This approach maintains a clear separation between the Bitcoin protocol and encryption functionality, placing the encryption responsibility entirely within the transport layer.
Encrypted communication between Nakamoto nodes can now be enabled using the --p2p-v2 flag:
$ cargo run --release -p nakamoto-node -- --testnet --p2p-v2
As recommended in BIP324, I've implemented a fallback mechanism that reverts to V1 protocol when the V2 handshake fails.
I've added a test case (test_full_sync_v2) to verify successful V2 communication. However, I cannot currently test the fallback functionality in the test environment due to a limitation in Nakamoto's current state (please correct me if I'm wrong) - V1 Responder nodes hang when receiving unrecognized messages (in this case, the 64-byte ElligatorSwift-encoded public key). Despite this testing limitation, the fallback mechanism works successfully in the testnet environment, allowing connections to V1 nodes.