From 959589e8bc9850d3a7957dbbcde5b765ebb354dd Mon Sep 17 00:00:00 2001
From: "kody.low" <kodylow7@gmail.com>
Date: Sun, 2 Jun 2024 15:32:10 -0700
Subject: [PATCH 1/2] fix: sent info and writing keys correctly

---
 fedimint-nwc/src/main.rs           |  3 +-
 fedimint-nwc/src/services/nostr.rs | 74 +++++++++++++++++++-----------
 2 files changed, 49 insertions(+), 28 deletions(-)

diff --git a/fedimint-nwc/src/main.rs b/fedimint-nwc/src/main.rs
index 0db801a..0eec08a 100644
--- a/fedimint-nwc/src/main.rs
+++ b/fedimint-nwc/src/main.rs
@@ -18,10 +18,11 @@ use crate::state::AppState;
 async fn main() -> Result<()> {
     init_logging_and_env()?;
     let cli = Cli::parse();
-    let state = AppState::new(cli).await?;
+    let mut state = AppState::new(cli).await?;
 
     state.nostr_service.connect().await;
     state.nostr_service.broadcast_info_event().await?;
+    state.nostr_service.subscribe_nwc().await;
 
     let server_handle = tokio::spawn(async {
         match run_server().await {
diff --git a/fedimint-nwc/src/services/nostr.rs b/fedimint-nwc/src/services/nostr.rs
index 806e300..23bb1c8 100644
--- a/fedimint-nwc/src/services/nostr.rs
+++ b/fedimint-nwc/src/services/nostr.rs
@@ -7,7 +7,8 @@ use nostr::nips::nip04;
 use nostr::nips::nip47::Response;
 use nostr_sdk::secp256k1::SecretKey;
 use nostr_sdk::{
-    Client, Event, EventBuilder, EventId, JsonUtil, Keys, Kind, RelayPoolNotification, Tag,
+    Client, Event, EventBuilder, EventId, Filter, JsonUtil, Keys, Kind, RelayPoolNotification, Tag,
+    Timestamp,
 };
 use serde::{Deserialize, Serialize};
 use tokio::sync::broadcast::Receiver;
@@ -23,31 +24,43 @@ pub struct NostrService {
     user_key: SecretKey,
     #[serde(default)]
     pub sent_info: bool,
+    pub keys_file_path: PathBuf,
 }
 
 impl NostrService {
     pub async fn new(keys_file_path: &PathBuf, relays: &str) -> Result<Self> {
-        let (server_key, user_key) = match File::open(keys_file_path) {
+        let (server_key, user_key, sent_info) = match File::open(keys_file_path) {
             Ok(file) => {
                 let reader = BufReader::new(file);
                 let keys: Self = serde_json::from_reader(reader).context("Failed to parse JSON")?;
-                (keys.server_key, keys.user_key)
+                (keys.server_key, keys.user_key, keys.sent_info)
             }
             Err(_) => {
                 let (server_key, user_key) = Self::generate_keys()?;
-                Self::write_keys(server_key, user_key, keys_file_path)?;
-                (server_key, user_key)
+                (server_key, user_key, false)
             }
         };
 
         let client = Client::new(&Keys::new(server_key.into()));
-        Self::add_relays(&client, relays).await?;
-        Ok(Self {
+        let service = Self {
             client,
             server_key,
             user_key,
-            sent_info: false,
-        })
+            sent_info,
+            keys_file_path: keys_file_path.clone(),
+        };
+
+        service.add_relays(relays).await?;
+
+        if !sent_info {
+            service.write_keys().context("Failed to write keys")?;
+        }
+
+        Ok(service)
+    }
+
+    pub fn set_sent_info(&mut self, sent_info: bool) {
+        self.sent_info = sent_info;
     }
 
     fn generate_keys() -> Result<(SecretKey, SecretKey)> {
@@ -58,20 +71,10 @@ impl NostrService {
         Ok((**server_key, **user_key))
     }
 
-    fn write_keys(
-        server_key: SecretKey,
-        user_key: SecretKey,
-        keys_file_path: &PathBuf,
-    ) -> Result<()> {
-        let keys = Self {
-            server_key,
-            user_key,
-            sent_info: false,
-            client: Client::new(&Keys::new(server_key.into())), /* Dummy client for struct
-                                                                 * initialization */
-        };
-        let json_str = serde_json::to_string(&keys).context("Failed to serialize data")?;
-        let mut file = File::create(keys_file_path).context("Failed to create file")?;
+    fn write_keys(&self) -> Result<()> {
+        let json_str = serde_json::to_string(&self).context("Failed to serialize data")?;
+        let mut file =
+            File::create(self.keys_file_path.clone()).context("Failed to create file")?;
         file.write_all(json_str.as_bytes())
             .context("Failed to write to file")?;
         Ok(())
@@ -85,7 +88,7 @@ impl NostrService {
         Keys::new(self.user_key.into())
     }
 
-    async fn add_relays(client: &Client, relays: &str) -> Result<()> {
+    async fn add_relays(&self, relays: &str) -> Result<()> {
         let lines = relays.split(',').collect::<Vec<_>>();
         let relays = lines
             .iter()
@@ -94,7 +97,7 @@ impl NostrService {
             .map(|line| line.to_string())
             .collect::<Vec<_>>();
         for relay in relays {
-            client.add_relay(relay).await?;
+            self.client.add_relay(relay).await?;
         }
         Ok(())
     }
@@ -130,7 +133,10 @@ impl NostrService {
         Ok(())
     }
 
-    pub async fn broadcast_info_event(&self) -> Result<(), anyhow::Error> {
+    pub async fn broadcast_info_event(&mut self) -> Result<(), anyhow::Error> {
+        if self.sent_info {
+            return Ok(());
+        }
         let content = METHODS
             .iter()
             .map(ToString::to_string)
@@ -139,8 +145,10 @@ impl NostrService {
         let info = EventBuilder::new(Kind::WalletConnectInfo, content, [])
             .to_event(&self.server_keys())?;
         info!("Broadcasting info event: {}", info.as_json());
-        let event_id = self.client.send_event(info).await?;
+        let event_id = self.send_event(info).await?;
         info!("Broadcasted info event: {}", event_id);
+        self.sent_info = true;
+        self.write_keys()?;
         Ok(())
     }
 
@@ -164,4 +172,16 @@ impl NostrService {
             && event.verify().is_ok()
             && event.pubkey == self.user_keys().public_key()
     }
+
+    pub async fn subscribe_nwc(&self) {
+        let subscription = Filter::new()
+            .kinds(vec![Kind::WalletConnectRequest])
+            .author(self.user_keys().public_key())
+            .pubkey(self.server_keys().public_key())
+            .since(Timestamp::now());
+
+        self.client.subscribe(vec![subscription], None).await;
+
+        info!("Listening for nip 47 requests...");
+    }
 }

From c58b6162725f4d52dabb8788bada52fb3e2b99fd Mon Sep 17 00:00:00 2001
From: "kody.low" <kodylow7@gmail.com>
Date: Sun, 2 Jun 2024 15:51:06 -0700
Subject: [PATCH 2/2] feat: simple nwc

---
 Cargo.lock                         | 635 ++++++++++++++++++++++++++++-
 fedimint-nwc/Cargo.toml            |   2 +
 fedimint-nwc/src/main.rs           |   9 +
 fedimint-nwc/src/services/nostr.rs |  43 +-
 fedimint-nwc/src/utils.rs          |  14 +
 5 files changed, 690 insertions(+), 13 deletions(-)
 create mode 100644 fedimint-nwc/src/utils.rs

diff --git a/Cargo.lock b/Cargo.lock
index fb866cf..aa2e974 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -65,6 +65,12 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "aligned-vec"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4aa90d7ce82d4be67b64039a3d588d38dbcc6736577de4a847025ce5b0c468d1"
+
 [[package]]
 name = "allocator-api2"
 version = "0.2.18"
@@ -155,6 +161,23 @@ dependencies = [
  "syn 2.0.60",
 ]
 
+[[package]]
+name = "arbitrary"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db55d72333851e17d572bec876e390cd3b11eb1ef53ae821dd9f3b653d2b4569"
+
+[[package]]
+name = "arg_enum_proc_macro"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ae92a5119aa49cdbcf6b9f893fe4e1d98b04ccbf82ee0584ad948a44a734dea"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.60",
+]
+
 [[package]]
 name = "argon2"
 version = "0.5.3"
@@ -172,6 +195,9 @@ name = "arrayvec"
 version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "96d30a06541fbafbc7f82ed10c06164cfbd2c401138f6addd8404629c4b16711"
+dependencies = [
+ "serde",
+]
 
 [[package]]
 name = "async-lock"
@@ -295,6 +321,30 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f1fdabc7756949593fe60f30ec81974b613357de856987752631dea1e3394c80"
 
+[[package]]
+name = "av1-grain"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6678909d8c5d46a42abcf571271e15fdbc0a225e3646cf23762cd415046c78bf"
+dependencies = [
+ "anyhow",
+ "arrayvec",
+ "log",
+ "nom",
+ "num-rational",
+ "serde",
+ "v_frame",
+]
+
+[[package]]
+name = "avif-serialize"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "876c75a42f6364451a033496a14c44bffe41f5f4a8236f697391f11024e596d2"
+dependencies = [
+ "arrayvec",
+]
+
 [[package]]
 name = "axum"
 version = "0.7.5"
@@ -505,6 +555,12 @@ dependencies = [
  "unicode-normalization",
 ]
 
+[[package]]
+name = "bit_field"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc827186963e592360843fb5ba4b973e145841266c1357f7180c43526f2e5b61"
+
 [[package]]
 name = "bitcoin"
 version = "0.29.2"
@@ -636,6 +692,12 @@ version = "3.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a1d084b0137aaa901caf9f1e8b21daa6aa24d41cd806e111335541eff9683bd6"
 
+[[package]]
+name = "bitstream-io"
+version = "1.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e445576659fd04a57b44cbd00aa37aaa815ebefa0aa3cb677a6b5e63d883074f"
+
 [[package]]
 name = "bitvec"
 version = "1.0.1"
@@ -698,6 +760,15 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "built"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b9c056b9ed43aee5e064b683aa1ec783e19c6acec7559e3ae931b7490472fbe"
+dependencies = [
+ "cargo-lock",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.16.0"
@@ -710,12 +781,24 @@ version = "1.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3ac9f8b63eca6fd385229b3675f6cc0dc5c8a5c8a54a59d4f52ffd670d87b0c"
 
+[[package]]
+name = "bytemuck"
+version = "1.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78834c15cb5d5efe3452d58b1e8ba890dd62d21907f867f383358198e56ebca5"
+
 [[package]]
 name = "byteorder"
 version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
 
+[[package]]
+name = "byteorder-lite"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f1fe948ff07f4bd06c30984e69f5b4899c516a3ef74f34df92a2df2ab535495"
+
 [[package]]
 name = "bytes"
 version = "1.6.0"
@@ -733,6 +816,18 @@ dependencies = [
  "pkg-config",
 ]
 
+[[package]]
+name = "cargo-lock"
+version = "8.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "031718ddb8f78aa5def78a09e90defe30151d1f6c672f937af4dd916429ed996"
+dependencies = [
+ "semver",
+ "serde",
+ "toml 0.5.11",
+ "url",
+]
+
 [[package]]
 name = "cbc"
 version = "0.1.2"
@@ -762,6 +857,16 @@ dependencies = [
  "nom",
 ]
 
+[[package]]
+name = "cfg-expr"
+version = "0.15.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b40ccee03b5175c18cde8f37e7d2a33bcef6f8ec8f7cc0d81090d1bb380949c9"
+dependencies = [
+ "smallvec",
+ "target-lexicon",
+]
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -907,6 +1012,12 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "98cc8fbded0c607b7ba9dd60cd98df59af97e84d24e49c8557331cfc26d301ce"
 
+[[package]]
+name = "color_quant"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d7b894f5411737b7867f4827955924d7c254fc9f4d91a6aad6b097804b1018b"
+
 [[package]]
 name = "colorchoice"
 version = "1.0.1"
@@ -956,6 +1067,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "crc32fast"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a97769d94ddab943e4510d138150169a2758b5ef3eb191a9ee688de3e23ef7b3"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "crossbeam-channel"
 version = "0.5.12"
@@ -965,6 +1085,25 @@ dependencies = [
  "crossbeam-utils",
 ]
 
+[[package]]
+name = "crossbeam-deque"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "613f8cc01fe9cf1a3eb3d7f488fd2fa8388403e97039e2f73692932e291a770d"
+dependencies = [
+ "crossbeam-epoch",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.9.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
+dependencies = [
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "crossbeam-utils"
 version = "0.8.19"
@@ -1136,12 +1275,37 @@ dependencies = [
  "pin-project-lite",
 ]
 
+[[package]]
+name = "exr"
+version = "1.72.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "887d93f60543e9a9362ef8a21beedd0a833c5d9610e18c67abe15a5963dcb1a4"
+dependencies = [
+ "bit_field",
+ "flume",
+ "half",
+ "lebe",
+ "miniz_oxide",
+ "rayon-core",
+ "smallvec",
+ "zune-inflate",
+]
+
 [[package]]
 name = "fastrand"
 version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9fc0510504f03c51ada170672ac806f1f105a88aa97a5281117e1ddc3368e51a"
 
+[[package]]
+name = "fdeflate"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4f9bfee30e4dedf0ab8b422f03af778d9612b63f502710fc500a334ebe2de645"
+dependencies = [
+ "simd-adler32",
+]
+
 [[package]]
 name = "fedimint"
 version = "0.0.1"
@@ -1497,11 +1661,13 @@ dependencies = [
  "clap 4.5.4",
  "dotenv",
  "futures-util",
+ "image",
  "itertools 0.13.0",
  "lightning-invoice",
  "multimint 0.3.7",
  "nostr",
  "nostr-sdk",
+ "qrcode",
  "redb",
  "serde",
  "serde_json",
@@ -1633,6 +1799,25 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "flate2"
+version = "1.0.30"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f54427cfd1c7829e2a139fcefea601bf088ebca651d2bf53ebc600eac295dae"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide",
+]
+
+[[package]]
+name = "flume"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55ac459de2512911e4b674ce33cf20befaba382d05b62b008afc1c8b57cbf181"
+dependencies = [
+ "spin 0.9.8",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -1776,6 +1961,16 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "gif"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fb2d69b19215e18bb912fa30f7ce15846e301408695e44e0ef719f1da9e19f2"
+dependencies = [
+ "color_quant",
+ "weezl",
+]
+
 [[package]]
 name = "gimli"
 version = "0.28.1"
@@ -1876,6 +2071,16 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "half"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6dd08c532ae367adf81c312a4580bc67f1d0fe8bc9c460520283f4c0ff277888"
+dependencies = [
+ "cfg-if",
+ "crunchy",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.8.2"
@@ -2173,6 +2378,39 @@ dependencies = [
  "unicode-normalization",
 ]
 
+[[package]]
+name = "image"
+version = "0.25.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd54d660e773627692c524beaad361aca785a4f9f5730ce91f42aabe5bce3d11"
+dependencies = [
+ "bytemuck",
+ "byteorder",
+ "color_quant",
+ "exr",
+ "gif",
+ "image-webp",
+ "num-traits",
+ "png",
+ "qoi",
+ "ravif",
+ "rayon",
+ "rgb",
+ "tiff",
+ "zune-core",
+ "zune-jpeg",
+]
+
+[[package]]
+name = "image-webp"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d730b085583c4d789dfd07fdcf185be59501666a90c97c40162b37e4fdad272d"
+dependencies = [
+ "byteorder-lite",
+ "thiserror",
+]
+
 [[package]]
 name = "imbl"
 version = "2.0.3"
@@ -2195,6 +2433,12 @@ dependencies = [
  "bitmaps",
 ]
 
+[[package]]
+name = "imgref"
+version = "1.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44feda355f4159a7c757171a77de25daf6411e217b4cabd03bd6650690468126"
+
 [[package]]
 name = "impl-tools"
 version = "0.10.0"
@@ -2291,6 +2535,17 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "interpolate_name"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c34819042dc3d3971c46c2190835914dfbe0c3c13f61449b2997f4e9722dfa60"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.60",
+]
+
 [[package]]
 name = "ipnet"
 version = "2.9.0"
@@ -2345,6 +2600,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "jpeg-decoder"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f5d4a7da358eff58addd2877a45865158f0d78c911d43a5784ceb7bbf52833b0"
+
 [[package]]
 name = "js-sys"
 version = "0.3.69"
@@ -2470,12 +2731,28 @@ version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
 
+[[package]]
+name = "lebe"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "03087c2bad5e1034e8cace5926dec053fb3790248370865f5117a7d0213354c8"
+
 [[package]]
 name = "libc"
 version = "0.2.153"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c198f91728a82281a64e1f4f9eeb25d82cb32a5de251c6bd1b5154d63a8e7bd"
 
+[[package]]
+name = "libfuzzer-sys"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fcf184a4b6b274f82a5df6b357da6055d3e82272327bba281c28bbba6f1664ef"
+dependencies = [
+ "arbitrary",
+ "cc",
+]
+
 [[package]]
 name = "libloading"
 version = "0.8.3"
@@ -2586,6 +2863,15 @@ version = "0.4.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "90ed8c1e510134f979dbc4f070f87d4313098b704861a105fe34231c70a3901c"
 
+[[package]]
+name = "loop9"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fae87c125b03c1d2c0150c90365d7d6bcc53fb73a9acaef207d2d065860f062"
+dependencies = [
+ "imgref",
+]
+
 [[package]]
 name = "lru"
 version = "0.12.3"
@@ -2636,6 +2922,16 @@ version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0e7465ac9959cc2b1404e8e2367b43684a6d13790fe23056cc8c6c5a6b7bcb94"
 
+[[package]]
+name = "maybe-rayon"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ea1f30cedd69f0a2954655f7188c6a834246d2bcf1e315e2ac40c4b24dc9519"
+dependencies = [
+ "cfg-if",
+ "rayon",
+]
+
 [[package]]
 name = "memchr"
 version = "2.7.2"
@@ -2691,6 +2987,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9d811f3e15f28568be3407c8e7fdb6514c1cda3cb30683f15b6a1a1dc4ea14a7"
 dependencies = [
  "adler",
+ "simd-adler32",
 ]
 
 [[package]]
@@ -2753,6 +3050,12 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e664971378a3987224f7a0e10059782035e89899ae403718ee07de85bec42afe"
 
+[[package]]
+name = "new_debug_unreachable"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "650eef8c711430f1a879fdd01d4745a7deea475becfb90269c06775983bbf086"
+
 [[package]]
 name = "nom"
 version = "7.1.3"
@@ -2763,6 +3066,12 @@ dependencies = [
  "minimal-lexical",
 ]
 
+[[package]]
+name = "noop_proc_macro"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0676bb32a98c1a483ce53e500a81ad9c3d5b3f7c920c28c24e9cb0980d0b5bc8"
+
 [[package]]
 name = "nostr"
 version = "0.31.2"
@@ -2877,12 +3186,53 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "num-bigint"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c165a9ab64cf766f73521c0dd2cfdff64f488b8f0b3e621face3462d3db536d7"
+dependencies = [
+ "num-integer",
+ "num-traits",
+]
+
 [[package]]
 name = "num-conv"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
 
+[[package]]
+name = "num-derive"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "876a53fff98e03a936a674b29568b0e605f06b29372c2489ff4de23f1949743d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
+[[package]]
+name = "num-integer"
+version = "0.1.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7969661fd2958a5cb096e56c8e1ad0444ac2bbcd0061bd28660485a44879858f"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "num-rational"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f83d14da390562dca69fc84082e73e548e1ad308d24accdedd2720017cb37824"
+dependencies = [
+ "num-bigint",
+ "num-integer",
+ "num-traits",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.18"
@@ -3159,6 +3509,19 @@ version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231b230927b5e4ad203db57bbcbee2802f6bce620b1e4a9024a07d94e2907ec"
 
+[[package]]
+name = "png"
+version = "0.17.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06e4b0d3d1312775e782c86c91a111aa1f910cbb65e1337f9975b5f9a554b5e1"
+dependencies = [
+ "bitflags 1.3.2",
+ "crc32fast",
+ "fdeflate",
+ "flate2",
+ "miniz_oxide",
+]
+
 [[package]]
 name = "poly1305"
 version = "0.8.0"
@@ -3189,7 +3552,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b00f26d3400549137f92511a46ac1cd8ce37cb5598a96d382381458b992a5d24"
 dependencies = [
  "toml_datetime",
- "toml_edit",
+ "toml_edit 0.20.2",
 ]
 
 [[package]]
@@ -3246,6 +3609,30 @@ version = "2.28.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "106dd99e98437432fed6519dedecfade6a06a73bb7b2a1e019fdd2bee5778d94"
 
+[[package]]
+name = "qoi"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f6d64c71eb498fe9eae14ce4ec935c555749aef511cca85b5568910d6e48001"
+dependencies = [
+ "bytemuck",
+]
+
+[[package]]
+name = "qrcode"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23e719ca51966ff9f5a8436edb00d6115b3c606a0bb27c8f8ca74a38ff2b036d"
+dependencies = [
+ "image",
+]
+
+[[package]]
+name = "quick-error"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a993555f31e5a609f617c12db6250dedcac1b0a85076912c436e6fc9b2c8e6a3"
+
 [[package]]
 name = "quote"
 version = "1.0.36"
@@ -3300,6 +3687,77 @@ dependencies = [
  "rand_core",
 ]
 
+[[package]]
+name = "rav1e"
+version = "0.6.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "16c383692a5e7abd9f6d1eddb1a5e0269f859392387883361bb09e5555852ec1"
+dependencies = [
+ "arbitrary",
+ "arg_enum_proc_macro",
+ "arrayvec",
+ "av1-grain",
+ "bitstream-io",
+ "built",
+ "cfg-if",
+ "interpolate_name",
+ "itertools 0.10.5",
+ "libc",
+ "libfuzzer-sys",
+ "log",
+ "maybe-rayon",
+ "new_debug_unreachable",
+ "noop_proc_macro",
+ "num-derive",
+ "num-traits",
+ "once_cell",
+ "paste",
+ "rand",
+ "rand_chacha",
+ "rust_hawktracer",
+ "rustc_version",
+ "simd_helpers",
+ "system-deps",
+ "thiserror",
+ "v_frame",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "ravif"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "badc69028460108fa7e32d4aec2b0c980710d7a31a896864002c8c1fc61516ee"
+dependencies = [
+ "avif-serialize",
+ "imgref",
+ "loop9",
+ "quick-error",
+ "rav1e",
+ "rayon",
+ "rgb",
+]
+
+[[package]]
+name = "rayon"
+version = "1.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b418a60154510ca1a002a752ca9714984e21e4241e804d32555251faf8b78ffa"
+dependencies = [
+ "either",
+ "rayon-core",
+]
+
+[[package]]
+name = "rayon-core"
+version = "1.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1465873a3dfdaa8ae7cb14b4383657caab0b3e8a0aa9ae8e04b044854c8dfce2"
+dependencies = [
+ "crossbeam-deque",
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "redb"
 version = "2.1.0"
@@ -3446,6 +3904,15 @@ dependencies = [
  "winreg 0.52.0",
 ]
 
+[[package]]
+name = "rgb"
+version = "0.8.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05aaa8004b64fd573fc9d002f4e632d51ad4f026c2b5ba95fcb6c2f32c2c47d8"
+dependencies = [
+ "bytemuck",
+]
+
 [[package]]
 name = "ring"
 version = "0.16.20"
@@ -3486,6 +3953,28 @@ dependencies = [
  "librocksdb-sys",
 ]
 
+[[package]]
+name = "rust_hawktracer"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3480a29b927f66c6e06527be7f49ef4d291a01d694ec1fe85b0de71d6b02ac1"
+dependencies = [
+ "rust_hawktracer_normal_macro",
+ "rust_hawktracer_proc_macro",
+]
+
+[[package]]
+name = "rust_hawktracer_normal_macro"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a570059949e1dcdc6f35228fa389f54c2c84dfe0c94c05022baacd56eacd2e9"
+
+[[package]]
+name = "rust_hawktracer_proc_macro"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb626abdbed5e93f031baae60d72032f56bc964e11ac2ff65f2ba3ed98d6d3e1"
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.23"
@@ -3730,6 +4219,9 @@ name = "semver"
 version = "1.0.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "61697e0a1c7e512e84a621326239844a24d8207b4669b41bc18b32ea5cbf988b"
+dependencies = [
+ "serde",
+]
 
 [[package]]
 name = "send_wrapper"
@@ -3794,6 +4286,15 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_spanned"
+version = "0.6.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "79e674e01f999af37c49f70a6ede167a8a60b2503e56c5599532a65baa5969a0"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "serde_urlencoded"
 version = "0.7.1"
@@ -3875,6 +4376,21 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "simd-adler32"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d66dc143e6b11c1eddc06d5c423cfc97062865baf299914ab64caa38182078fe"
+
+[[package]]
+name = "simd_helpers"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "95890f873bec569a0362c235787f3aca6e1e887302ba4840839bcc6459c42da6"
+dependencies = [
+ "quote",
+]
+
 [[package]]
 name = "slab"
 version = "0.4.9"
@@ -3926,6 +4442,9 @@ name = "spin"
 version = "0.9.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6980e8d7511241f8acf4aebddbb1ff938df5eebe98691418c4468d0b72a96a67"
+dependencies = [
+ "lock_api",
+]
 
 [[package]]
 name = "strsim"
@@ -4019,12 +4538,31 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "system-deps"
+version = "6.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "30c2de8a4d8f4b823d634affc9cd2a74ec98c53a756f317e529a48046cbf71f3"
+dependencies = [
+ "cfg-expr",
+ "heck 0.4.1",
+ "pkg-config",
+ "toml 0.7.8",
+ "version-compare",
+]
+
 [[package]]
 name = "tap"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
 
+[[package]]
+name = "target-lexicon"
+version = "0.12.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1fc403891a21bcfb7c37834ba66a547a8f402146eba7265b5a6d88059c9ff2f"
+
 [[package]]
 name = "termcolor"
 version = "1.4.1"
@@ -4070,6 +4608,17 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "tiff"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba1310fcea54c6a9a4fd1aad794ecc02c31682f6bfbecdf460bf19533eed1e3e"
+dependencies = [
+ "flate2",
+ "jpeg-decoder",
+ "weezl",
+]
+
 [[package]]
 name = "time"
 version = "0.3.36"
@@ -4243,11 +4792,48 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "toml"
+version = "0.5.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f4f7f0dd8d50a853a531c426359045b1998f04219d88799810762cd4ad314234"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "toml"
+version = "0.7.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd79e69d3b627db300ff956027cc6c3798cef26d22526befdfcd12feeb6d2257"
+dependencies = [
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "toml_edit 0.19.15",
+]
+
 [[package]]
 name = "toml_datetime"
 version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7cda73e2f1397b1262d6dfdcef8aafae14d1de7748d66822d3bfeeb6d03e5e4b"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "toml_edit"
+version = "0.19.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b5bb770da30e5cbfde35a2d7b9b8a2c4b8ef89548a7a6aeab5c9a576e3e7421"
+dependencies = [
+ "indexmap 2.2.6",
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "winnow",
+]
 
 [[package]]
 name = "toml_edit"
@@ -4491,6 +5077,17 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
+[[package]]
+name = "v_frame"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d6f32aaa24bacd11e488aa9ba66369c7cd514885742c9fe08cfe85884db3e92b"
+dependencies = [
+ "aligned-vec",
+ "num-traits",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "validator"
 version = "0.17.0"
@@ -4533,6 +5130,12 @@ version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
 
+[[package]]
+name = "version-compare"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "579a42fc0b8e0c63b76519a339be31bed574929511fa53c1a3acae26eb258f29"
+
 [[package]]
 name = "version_check"
 version = "0.9.4"
@@ -4672,6 +5275,12 @@ dependencies = [
  "rustls-pki-types",
 ]
 
+[[package]]
+name = "weezl"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53a85b86a771b1c87058196170769dd264f66c0782acf1ae6cc51bfd64b39082"
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -4924,3 +5533,27 @@ dependencies = [
  "cc",
  "pkg-config",
 ]
+
+[[package]]
+name = "zune-core"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f423a2c17029964870cfaabb1f13dfab7d092a62a29a89264f4d36990ca414a"
+
+[[package]]
+name = "zune-inflate"
+version = "0.2.54"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73ab332fe2f6680068f3582b16a24f90ad7096d5d39b974d1c0aff0125116f02"
+dependencies = [
+ "simd-adler32",
+]
+
+[[package]]
+name = "zune-jpeg"
+version = "0.4.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec866b44a2a1fd6133d363f073ca1b179f438f99e7e5bfb1e33f7181facfe448"
+dependencies = [
+ "zune-core",
+]
diff --git a/fedimint-nwc/Cargo.toml b/fedimint-nwc/Cargo.toml
index 2e1c779..b5963aa 100644
--- a/fedimint-nwc/Cargo.toml
+++ b/fedimint-nwc/Cargo.toml
@@ -16,12 +16,14 @@ bincode = "1.3.3"
 clap = { version = "4.5.4", features = ["derive", "env"] }
 dotenv = "0.15.0"
 futures-util = "0.3.30"
+image = "0.25.1"
 itertools = "0.13.0"
 lightning-invoice = { version = "0.26.0", features = ["serde"] }
 # multimint = { version = "0.3.6" }
 multimint = { path = "../multimint" }
 nostr = { version = "0.31.2", features = ["nip47"] }
 nostr-sdk = { version = "0.31.0", features = ["nip47"] }
+qrcode = "0.14.0"
 redb = "2.1.0"
 serde = "1.0.193"
 serde_json = "1.0.108"
diff --git a/fedimint-nwc/src/main.rs b/fedimint-nwc/src/main.rs
index 0eec08a..2375a74 100644
--- a/fedimint-nwc/src/main.rs
+++ b/fedimint-nwc/src/main.rs
@@ -9,6 +9,7 @@ pub mod nwc;
 pub mod server;
 pub mod services;
 pub mod state;
+pub mod utils;
 
 use crate::config::Cli;
 use crate::server::run_server;
@@ -24,6 +25,10 @@ async fn main() -> Result<()> {
     state.nostr_service.broadcast_info_event().await?;
     state.nostr_service.subscribe_nwc().await;
 
+    let uri = state.nostr_service.new_nwc_uri().await?;
+    info!("\nUri: {uri}\n");
+    utils::print_as_qr_code(&uri.to_string()).await?;
+
     let server_handle = tokio::spawn(async {
         match run_server().await {
             Ok(_) => info!("Server ran successfully."),
@@ -80,6 +85,10 @@ async fn handle_notification(notification: RelayPoolNotification, state: &AppSta
             }
             Ok(())
         }
+        RelayPoolNotification::RelayStatus { relay_url, status } => {
+            info!("Relay status: {relay_url:?} {status:?}");
+            Ok(())
+        }
         RelayPoolNotification::Shutdown => {
             info!("Relay pool shutdown");
             Err(anyhow::anyhow!("Relay pool shutdown"))
diff --git a/fedimint-nwc/src/services/nostr.rs b/fedimint-nwc/src/services/nostr.rs
index 23bb1c8..d924c38 100644
--- a/fedimint-nwc/src/services/nostr.rs
+++ b/fedimint-nwc/src/services/nostr.rs
@@ -1,14 +1,15 @@
 use std::fs::File;
 use std::io::{BufReader, Write};
 use std::path::PathBuf;
+use std::str::FromStr;
 
 use anyhow::{anyhow, Context, Result};
 use nostr::nips::nip04;
-use nostr::nips::nip47::Response;
+use nostr::nips::nip47::{NostrWalletConnectURI, Response};
 use nostr_sdk::secp256k1::SecretKey;
 use nostr_sdk::{
     Client, Event, EventBuilder, EventId, Filter, JsonUtil, Keys, Kind, RelayPoolNotification, Tag,
-    Timestamp,
+    Timestamp, Url,
 };
 use serde::{Deserialize, Serialize};
 use tokio::sync::broadcast::Receiver;
@@ -25,6 +26,7 @@ pub struct NostrService {
     #[serde(default)]
     pub sent_info: bool,
     pub keys_file_path: PathBuf,
+    pub relays: Vec<String>,
 }
 
 impl NostrService {
@@ -41,6 +43,14 @@ impl NostrService {
             }
         };
 
+        let lines = relays.split(',').collect::<Vec<_>>();
+        let relays = lines
+            .iter()
+            .map(|line| line.trim())
+            .filter(|line| !line.is_empty())
+            .map(|line| line.to_string())
+            .collect::<Vec<_>>();
+
         let client = Client::new(&Keys::new(server_key.into()));
         let service = Self {
             client,
@@ -48,9 +58,10 @@ impl NostrService {
             user_key,
             sent_info,
             keys_file_path: keys_file_path.clone(),
+            relays,
         };
 
-        service.add_relays(relays).await?;
+        service.add_relays().await?;
 
         if !sent_info {
             service.write_keys().context("Failed to write keys")?;
@@ -88,15 +99,8 @@ impl NostrService {
         Keys::new(self.user_key.into())
     }
 
-    async fn add_relays(&self, relays: &str) -> Result<()> {
-        let lines = relays.split(',').collect::<Vec<_>>();
-        let relays = lines
-            .iter()
-            .map(|line| line.trim())
-            .filter(|line| !line.is_empty())
-            .map(|line| line.to_string())
-            .collect::<Vec<_>>();
-        for relay in relays {
+    async fn add_relays(&self) -> Result<()> {
+        for relay in self.relays.iter() {
             self.client.add_relay(relay).await?;
         }
         Ok(())
@@ -135,6 +139,7 @@ impl NostrService {
 
     pub async fn broadcast_info_event(&mut self) -> Result<(), anyhow::Error> {
         if self.sent_info {
+            info!("Already sent info event");
             return Ok(());
         }
         let content = METHODS
@@ -184,4 +189,18 @@ impl NostrService {
 
         info!("Listening for nip 47 requests...");
     }
+
+    pub async fn new_nwc_uri(&self) -> Result<NostrWalletConnectURI> {
+        let relay = self
+            .relays
+            .first()
+            .ok_or_else(|| anyhow::anyhow!("No relays provided, cannot generate URI"))?;
+        let uri = NostrWalletConnectURI::new(
+            self.server_keys().public_key(),
+            Url::from_str(relay)?,
+            self.user_keys().secret_key()?.clone(),
+            None,
+        );
+        Ok(uri)
+    }
 }
diff --git a/fedimint-nwc/src/utils.rs b/fedimint-nwc/src/utils.rs
new file mode 100644
index 0000000..72cd49f
--- /dev/null
+++ b/fedimint-nwc/src/utils.rs
@@ -0,0 +1,14 @@
+use anyhow::Result;
+use qrcode::render::unicode;
+use qrcode::QrCode;
+
+pub async fn print_as_qr_code(data: &str) -> Result<()> {
+    let code = QrCode::new(data)?;
+    let image = code
+        .render::<unicode::Dense1x2>()
+        .dark_color(unicode::Dense1x2::Dark)
+        .light_color(unicode::Dense1x2::Light)
+        .build();
+    println!("{}", image);
+    Ok(())
+}