bl
258fa072aa
The discovery module defines the seam: DiscoveryProvider (subscribe/ announce over 32-byte TopicKeys) and a signed Announcement carrying root hash, ed25519 author, metadata and provider addresses. Signatures cover a deterministic postcard encoding including the topic (no cross- channel replay) and the provider identities (addresses stay refreshable hints). LanDiscovery conforms to the trait — mdns sightings become locally-authored announcements, one per pinned root — and the daemon's auto-sync now runs entirely through it: verify, index unconditionally, fetch only for trusted authors from allowlisted providers on already- pinned incomplete roots. The milestone-4 real-mdns sync test passes unchanged through the new path. Verification unit tests cover round trip, tampered root, wrong topic, forged author, mismatched signing key, and serde survival. docs/redoal-integration.md sketches the gesture-topic gossip provider against this contract. Also: fix a flaky hang in the socket-activation test (dup2(3,3) leaves CLOEXEC set when the listener already sits on fd 3; parent's listener copy masked daemon death), and give the test client a read-timeout hang guard. Add a top-level README. Dependencies: ed25519-dalek (Signature type; same implementation iroh keys use), postcard (deterministic signed encoding, iroh's canonical compact codec). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
67 lines
2.4 KiB
Markdown
67 lines
2.4 KiB
Markdown
# varde
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A small, boring, distro-packageable Linux daemon that owns a
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content-addressed blob store and mirrors content between consenting
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peers, built on [iroh](https://iroh.computer) (iroh-blobs 0.35).
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Applications talk to it over a unix socket: "add this path", "pin this
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hash", "materialize hash X at path Y". Think: what Windows Delivery
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Optimization is for updates — generalized, open, legible.
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*varde* (Norwegian): a stone cairn used as a waypoint.
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## Design ethos
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- **Infrastructure, not product.** No GUI, no self-updater. A daemon, a
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CLI, a JSON-lines socket protocol, man pages, systemd units.
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- **Legible to the network.** Identifiable mDNS advertisement, DSCP CS1
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marking, conservative rate limits (10 MiB/s up default), LAN-only with
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zero WAN upload by default, all transfers stop on metered connections.
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- **Consent-tiered.** Discovery is open; replication is explicit.
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Content is served only to allowlisted peers, except what you
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deliberately publish (`--open-lan` pins, exported tickets). All
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fetched data is BLAKE3-verified regardless — trust gates
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participation, not integrity.
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## Layout
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| crate | role |
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|---|---|
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| `varde-proto` | wire types for the socket API (serde, no I/O) |
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| `varde-daemon` | the service: store, endpoint, policy, socket server |
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| `varde-ctl` | CLI client and protocol reference implementation |
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`dist/` holds systemd units (system + user, socket activation),
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scdoc man pages, an example config, and an untested Arch PKGBUILD.
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`docs/` has per-milestone decision notes and the redoal integration
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sketch.
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## Quick start
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```console
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$ varde-daemon --user &
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$ varde-ctl add ~/dataset -r
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added 5b1c…e0 (1234567 bytes)
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$ varde-ctl pin 5b1c…e0
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$ varde-ctl ticket export 5b1c…e0 # hand this to another machine
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$ varde-ctl ticket import <ticket> # ...which runs this
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$ varde-ctl materialize 5b1c…e0 /srv/dataset # reflinks when possible
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```
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Trusted peers on the same LAN sync overlapping pins automatically:
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```console
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$ varde-ctl status # shows this daemon's node id
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$ varde-ctl peer trust <node-id-of-the-other-machine> # on both ends
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```
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## Building and testing
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```console
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$ cargo build --release
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$ cargo test --workspace # spawns real daemons; no mocked iroh
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$ cargo clippy --workspace --all-targets -- -D warnings
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```
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The `metered` feature (default on) needs D-Bus at runtime only; build
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with `--no-default-features` for systems without it.
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