build(deps): update rust-toolchain to 1.67 and bump uuid to 1.4

some of the dependency updates are requiring a higher version of the
rust toolchain. bump to 1.67 and fix new clippy lints.

also fix dprint to 0.39.1 because 0.40 has breaking changes.

swap/Cargo.toml

@@ -64,7 +64,7 @@ tracing-appender = "0.2"
 tracing-futures = { version = "0.2", features = [ "std-future", "futures-03" ] }
 tracing-subscriber = { version = "0.3", default-features = false, features = [ "fmt", "ansi", "env-filter", "time", "tracing-log", "json" ] }
 url = { version = "2", features = [ "serde" ] }
-uuid = { version = "1.3", features = [ "serde", "v4" ] }
+uuid = { version = "1.4", features = [ "serde", "v4" ] }
 void = "1"
 
 [target.'cfg(not(windows))'.dependencies]

swap/src/bitcoin/wallet.rs

@@ -54,7 +54,7 @@ impl Wallet {
     ) -> Result<Self> {
         let data_dir = data_dir.as_ref();
         let wallet_dir = data_dir.join(WALLET);
-        let database = bdk::sled::open(&wallet_dir)?.open_tree(SLED_TREE_NAME)?;
+        let database = bdk::sled::open(wallet_dir)?.open_tree(SLED_TREE_NAME)?;
         let network = env_config.bitcoin_network;
 
         let wallet = match bdk::Wallet::new(
@@ -97,7 +97,7 @@ impl Wallet {
         std::fs::rename(from, to)?;
 
         let wallet_dir = data_dir.join(WALLET);
-        let database = bdk::sled::open(&wallet_dir)?.open_tree(SLED_TREE_NAME)?;
+        let database = bdk::sled::open(wallet_dir)?.open_tree(SLED_TREE_NAME)?;
 
         let wallet = bdk::Wallet::new(
             bdk::template::Bip84(xprivkey, KeychainKind::External),
@@ -738,12 +738,15 @@ impl Client {
         let client = bdk::electrum_client::Client::new(electrum_rpc_url.as_str())
             .context("Failed to initialize Electrum RPC client")?;
         let blockchain = ElectrumBlockchain::from(client);
+        let last_sync = Instant::now()
+            .checked_sub(interval)
+            .expect("no underflow since block time is only 600 secs");
 
         Ok(Self {
             electrum,
             blockchain,
             latest_block_height: BlockHeight::try_from(latest_block)?,
-            last_sync: Instant::now() - interval,
+            last_sync,
             sync_interval: interval,
             script_history: Default::default(),
             subscriptions: Default::default(),

swap/src/network/test.rs

@@ -21,7 +21,7 @@ struct GlobalSpawnTokioExecutor;
 
 impl Executor for GlobalSpawnTokioExecutor {
     fn exec(&self, future: Pin<Box<dyn Future<Output = ()> + Send>>) {
-        let _ = tokio::spawn(future);
+        tokio::spawn(future);
     }
 }
 

swap/src/seed.rs

@@ -61,7 +61,7 @@ impl Seed {
         let file_path = Path::new(&file_path_buf);
 
         if file_path.exists() {
-            return Self::from_file(&file_path);
+            return Self::from_file(file_path);
         }
 
         tracing::debug!("No seed file found, creating at {}", file_path.display());

swap/tests/ensure_same_swap_id.rs

@@ -8,7 +8,7 @@ async fn ensure_same_swap_id_for_alice_and_bob() {
     harness::setup_test(SlowCancelConfig, |mut ctx| async move {
         let (bob_swap, _) = ctx.bob_swap().await;
         let bob_swap_id = bob_swap.id;
-        let _ = tokio::spawn(bob::run(bob_swap));
+        tokio::spawn(bob::run(bob_swap));
 
         // once Bob's swap is spawned we can retrieve Alice's swap and assert on the
         // swap ID

swap/tests/harness/mod.rs

@@ -928,7 +928,7 @@ async fn init_bitcoind(node_url: Url, spendable_quantity: u32) -> Result<Client>
     bitcoind_client
         .generatetoaddress(101 + spendable_quantity, reward_address.clone())
         .await?;
-    let _ = tokio::spawn(mine(bitcoind_client.clone(), reward_address));
+    tokio::spawn(mine(bitcoind_client.clone(), reward_address));
     Ok(bitcoind_client)
 }