Frid is the decentralized networking core behind Furumi. It provides reusable Rust libraries for building equal-peer applications with no application server, central peer registry, or privileged node.

The workspace has two layers:

federation-net establishes authenticated, NAT-traversing P2P connections over iroh, isolates independent networks and message schemas, and optionally discovers peers through the BitTorrent Mainline DHT.
music-dht builds a Kademlia-style distributed music directory on top of that transport, including catalog discovery, content-id lookup, direct byte streams, and shared Furumi wire types.

Each participant is a client, router, and storage peer. Automatic rendezvous has no Frid-operated bootstrap service, while self-contained peer tickets remain available for explicit or isolated connections.

Design principles

Equal peers. No node receives a permanent coordinator or server role.
Application-owned protocols. The transport moves typed messages and byte streams without owning domain state.
Bounded inputs. Frames, tickets, routing tables, requests, and record batches have explicit limits.
Offline-tolerant discovery. Records are replicated, refreshed by their owners, expired by TTL, and removed through revisioned tombstones.
Protocol isolation. Network IDs, schema IDs, versions, and ALPNs prevent unrelated or incompatible applications from being merged accidentally.
Local persistence. Identity, routing knowledge, owned records, and replicas survive restarts in application-controlled storage.

See ARCHITECTURE.md for the protocol layers, trust model, failure handling, and compatibility rules.

Workspace

crates/
  federation-net/       generic iroh transport and rendezvous
  music-dht/            distributed music catalog and content discovery

Using the libraries

Until crates are published to a registry, depend on the repository directly:

[dependencies]
federation-net = { git = "https://gt.hexor.cy/ab/frid.git" }
music-dht = { git = "https://gt.hexor.cy/ab/frid.git" }

Start with the crate documentation:

Development

Frid uses Rust edition 2024 and requires Rust 1.97 or newer.

cargo fmt --all -- --check
cargo check --workspace --all-targets --all-features
cargo clippy --workspace --all-targets --all-features -- -D warnings
cargo test --workspace

The integration tests open real local sockets and establish iroh connections. Some rendezvous tests also use public discovery infrastructure, so a restricted sandbox may need explicit network permission.

License

Frid is released under the Do What The Fuck You Want To Public License, Version 2.