add relay server to development network

crates/gsio-node/Cargo.toml

@@ -22,5 +22,7 @@ serde_json = "1.0"
 uuid = { version = "1.7.0", features = ["v4", "serde"] }
 chrono = { version = "0.4.35", features = ["serde"] }
 sha2 = "0.10.8"
-iroh = { version = "0.35.0", features = ["discovery-pkarr-dht"] }
+iroh = { version = "0.35.0", features = ["discovery-pkarr-dht", "discovery-local-network"] }
 iroh-blobs = { version = "0.35.0", features = ["rpc"] }
+url = "2.5.4"
+iroh-relay = "0.35.0"

crates/gsio-node/src/main.rs

@@ -6,7 +6,7 @@
 // - Each node is an autonomous sync unit
 
 use axum::{routing::get, Router};
-use iroh::{protocol::Router as IrohRouter, Endpoint};
+use iroh::{protocol::Router as IrohRouter, Endpoint, RelayMap, RelayMode, RelayUrl};
 use iroh_blobs::{
     net_protocol::Blobs,
     rpc::client::blobs::MemClient,
@@ -30,6 +30,9 @@ mod p2p;
 
 use ledger::{LedgerEntry, SharedLedger};
 use p2p::P2PManager;
+use url::Url;
+
+// assuming 'localhost' resolves to 127.0.0.1
 
 /// ========== Socket.io namespace helpers ==========
 fn register_root_namespace(io: &SocketIo, p2p: Arc<P2PManager>) {
@@ -355,8 +358,23 @@ async fn handle_blob_available(socket: SocketRef, p2p: Arc<P2PManager>, data: &J
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     tracing::subscriber::set_global_default(FmtSubscriber::default())?;
 
+
+    let relay_address = std::env::var("RELAY_ADDRESS").expect("RELAY_ADDRESS must be set");
+
+
+    let relay_url = RelayUrl::from_str(&*relay_address).unwrap();
+
+
+    let relays = RelayMap::from(relay_url);
+
+
+    
     // --- IROH SETUP --------------------------------------------------------
-    let endpoint = Endpoint::builder().discovery_n0().bind().await?;
+    let endpoint = Endpoint::builder().discovery_n0()
+        .relay_conn_protocol(iroh_relay::http::Protocol::Websocket)
+        .discovery_local_network()
+        .discovery_dht()
+        .relay_mode(RelayMode::Custom(relays)).bind().await?;
     // Concrete store type inferred from the builder
     let blobs = Arc::new(Blobs::memory().build(&endpoint));
     let router = IrohRouter::builder(endpoint.clone())

crates/gsio-relay/Dockerfile

@@ -0,0 +1,33 @@
+################################################################
+#  Stage 1 – build rustls-cert-gen and generate the certs
+################################################################
+FROM rust:bookworm AS ssl-step
+
+# ↓ Allow override of SAN / output directory at build time
+ARG CERT_DOMAIN=relay.local
+ARG OUT_DIR=/app/ssl
+
+# ── deps we need only for the build ───────────────────────────
+RUN apt-get update -qq && \
+    apt-get install -y --no-install-recommends git ca-certificates && \
+    rm -rf /var/lib/apt/lists/*
+
+# ── fetch the rcgen repo (contains the CLI) and build once ────
+WORKDIR /src
+RUN git clone --depth 1 https://github.com/rustls/rcgen.git
+WORKDIR /src/rcgen
+RUN cargo run -- -o /app/ssl
+
+################################################################
+#  Stage 2 – minimal runtime with the iroh relay
+################################################################
+FROM n0computer/iroh-relay:v0.28.2
+
+# copy the certs produced in stage 1
+COPY --from=ssl-step /app/ssl /app/ssl
+
+# your relay configuration
+COPY ./relay-config.toml /app/
+
+# hand off control to the relay
+CMD ["--dev"]

crates/gsio-relay/relay-config.toml

@@ -0,0 +1 @@
+stun_only = false