vjrj
2cafc7fc12
Extends the Block 2 spike to attack the highest-risk unbuilt piece (private messaging) and to prove the Q2 architecture recommendation with running code: - NostrConnection: one shared socket+key+sign+REQ/EOSE lifecycle. Refactored NostrOfferTransport onto it; added NostrMessageTransport — two thin contracts on ONE connection (the 'one connection, three interfaces' shape). - NIP-44 v2 encryption (secp256k1 ECDH -> ChaCha20 + HMAC, length-hiding pad). - NIP-17/NIP-59 gift-wrap: rumor(14) -> seal(13) -> wrap(1059, ephemeral key). Alice->Bob DM round-trips through the relay: encrypted, sender authenticated, and metadata-private (relay/eavesdropper sees only ciphertext, an ephemeral author and the recipient p-tag — Alice stays hidden). Findings updated: NIP-17 risk drops Medium-High -> Medium (hardening, not feasibility); next de-risking target is the web of trust. NIP-44 not yet vector-verified (noted). 20 tests green, analyzer clean, Block 1 untouched.
28 lines
973 B
Dart
28 lines
973 B
Dart
/// One decrypted direct message handed to the app.
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class DirectMessage {
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const DirectMessage({
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required this.fromPubkey,
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required this.text,
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required this.at,
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});
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/// The authenticated sender (from the inner rumor). NOT the gift-wrap author,
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/// which is a throwaway ephemeral key — that's the metadata-privacy point.
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final String fromPubkey;
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final String text;
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final DateTime at;
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}
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/// The second interface over the shared `NostrConnection` (Q2): private 1:1
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/// messaging. Deliberately SEPARATE from `OfferTransport` — its verbs (send a
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/// private DM / read an inbox) don't fit publish/discover. Backed by NIP-17
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/// gift-wrapped, NIP-44-encrypted events.
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abstract interface class MessageTransport {
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/// Sends [text] privately to [toPubkey].
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Future<void> send({required String toPubkey, required String text});
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/// Streams decrypted messages addressed to this identity.
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Stream<DirectMessage> inbox();
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Future<void> close();
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}
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