diff --git a/src/conn.rs b/src/conn.rs
index a0cd485..28e6a65 100644
--- a/src/conn.rs
+++ b/src/conn.rs
@@ -204,7 +204,7 @@ impl ClientConn {
                     }
                 }
 
-                match (relay.and_then(|url| host_str(url)), host_str(relay_url)) {
+                match (relay.and_then(host_str), host_str(relay_url)) {
                     (Some(received_relay), Some(our_relay)) => {
                         if received_relay != our_relay {
                             return Err(Error::AuthFailure);
diff --git a/src/db.rs b/src/db.rs
index 27aafaf..7526452 100644
--- a/src/db.rs
+++ b/src/db.rs
@@ -45,8 +45,8 @@ pub const DB_FILE: &str = "nostr.db";
 /// Will panic if the pool could not be created.
 pub async fn build_repo(settings: &Settings, metrics: NostrMetrics) -> Arc<dyn NostrRepo> {
     match settings.database.engine.as_str() {
-        "sqlite" => Arc::new(build_sqlite_pool(&settings, metrics).await),
-        "postgres" => Arc::new(build_postgres_pool(&settings, metrics).await),
+        "sqlite" => Arc::new(build_sqlite_pool(settings, metrics).await),
+        "postgres" => Arc::new(build_postgres_pool(settings, metrics).await),
         _ => panic!("Unknown database engine"),
     }
 }
@@ -378,7 +378,7 @@ pub async fn db_writer(
                         notice_tx
                             .try_send(Notice::blocked(
                                 event.id,
-                                &decision.message().unwrap_or_else(|| "".to_string()),
+                                &decision.message().unwrap_or_default(),
                             ))
                             .ok();
                         continue;
diff --git a/src/event.rs b/src/event.rs
index 6d16fc3..a0f5d5b 100644
--- a/src/event.rs
+++ b/src/event.rs
@@ -472,12 +472,11 @@ mod tests {
         let mut event = Event::simple_event();
         event.tags = vec![vec!["e".to_owned(), "foo".to_owned()]];
         event.build_index();
-        assert_eq!(
+        assert!(
             event.generic_tag_val_intersect(
                 'e',
                 &HashSet::from(["foo".to_owned(), "bar".to_owned()])
-            ),
-            true
+            )
         );
     }
 
diff --git a/src/nauthz.rs b/src/nauthz.rs
index 1d8caad..d16ca80 100644
--- a/src/nauthz.rs
+++ b/src/nauthz.rs
@@ -35,7 +35,7 @@ impl std::convert::From<Nip05Name> for nauthz_grpc::event_request::Nip05Name {
     fn from(value: Nip05Name) -> Self {
         nauthz_grpc::event_request::Nip05Name {
             local: value.local.clone(),
-            domain: value.domain.clone(),
+            domain: value.domain,
         }
     }
 }
@@ -57,7 +57,7 @@ impl EventAuthzService {
         eas
     }
 
-    pub async fn ready_connection(self: &mut Self) {
+    pub async fn ready_connection(&mut self) {
         if self.conn.is_none() {
             let client = AuthorizationClient::connect(self.server_addr.to_string()).await;
             if let Err(ref msg) = client {
@@ -70,7 +70,7 @@ impl EventAuthzService {
     }
 
     pub async fn admit_event(
-        self: &mut Self,
+        &mut self,
         event: &Event,
         ip: &str,
         origin: Option<String>,
@@ -99,13 +99,13 @@ impl EventAuthzService {
                     origin,
                     user_agent,
                     auth_pubkey,
-                    nip05: nip05.map(|x| nauthz_grpc::event_request::Nip05Name::from(x)),
+                    nip05: nip05.map(nauthz_grpc::event_request::Nip05Name::from),
                 })
                 .await?;
             let reply = svr_res.into_inner();
-            return Ok(Box::new(reply));
+            Ok(Box::new(reply))
         } else {
-            return Err(Error::AuthzError);
+            Err(Error::AuthzError)
         }
     }
 }
diff --git a/src/payment/lnbits.rs b/src/payment/lnbits.rs
index 055882e..9863243 100644
--- a/src/payment/lnbits.rs
+++ b/src/payment/lnbits.rs
@@ -110,7 +110,7 @@ impl PaymentProcessor for LNBitsPaymentProcessor {
             expiry: 3600,
         };
         let url = Url::parse(&self.settings.pay_to_relay.node_url)?.join(APIPATH)?;
-        let uri = Uri::from_str(url.as_str().strip_suffix("/").unwrap_or(url.as_str())).unwrap();
+        let uri = Uri::from_str(url.as_str().strip_suffix('/').unwrap_or(url.as_str())).unwrap();
 
         let req = hyper::Request::builder()
             .method(hyper::Method::POST)
diff --git a/src/repo/sqlite.rs b/src/repo/sqlite.rs
index 6c17c97..87d8556 100644
--- a/src/repo/sqlite.rs
+++ b/src/repo/sqlite.rs
@@ -842,7 +842,8 @@ impl NostrRepo for SqliteRepo {
     async fn update_invoice(&self, payment_hash: &str, status: InvoiceStatus) -> Result<String> {
         let mut conn = self.write_pool.get()?;
         let payment_hash = payment_hash.to_owned();
-        let pub_key = tokio::task::spawn_blocking(move || {
+
+        tokio::task::spawn_blocking(move || {
             let tx = conn.transaction()?;
             let pubkey: String;
             {
@@ -884,8 +885,7 @@ impl NostrRepo for SqliteRepo {
             let ok: Result<String> = Ok(pubkey);
             ok
         })
-        .await?;
-        pub_key
+        .await?
     }
 
     /// Get the most recent invoice for a given pubkey
@@ -1080,18 +1080,18 @@ fn query_from_filter(f: &ReqFilter) -> (String, Vec<Box<dyn ToSql>>, Option<Stri
                     ks.iter().map(std::string::ToString::to_string).collect();
                 kind_clause = format!("AND kind IN ({})", str_kinds.join(", "));
             } else {
-                kind_clause = format!("");
+                kind_clause = String::new();
             };
             if f.since.is_some() {
                 since_clause = format!("AND created_at > {}", f.since.unwrap());
             } else {
-                since_clause = format!("");
+                since_clause = String::new();
             };
             // Query for timestamp
             if f.until.is_some() {
                 until_clause = format!("AND created_at < {}", f.until.unwrap());
             } else {
-                until_clause = format!("");
+                until_clause = String::new();
             };
 
             let tag_clause = format!(
diff --git a/src/server.rs b/src/server.rs
index 2722e40..1fd0cd5 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -1125,8 +1125,8 @@ async fn nostr_server(
 
     let unspec = "<unspecified>".to_string();
     info!("new client connection (cid: {}, ip: {:?})", cid, conn.ip());
-    let origin = client_info.origin.as_ref().unwrap_or_else(|| &unspec);
-    let user_agent = client_info.user_agent.as_ref().unwrap_or_else(|| &unspec);
+    let origin = client_info.origin.as_ref().unwrap_or(&unspec);
+    let user_agent = client_info.user_agent.as_ref().unwrap_or(&unspec);
     info!(
         "cid: {}, origin: {:?}, user-agent: {:?}",
         cid, origin, user_agent
@@ -1175,14 +1175,12 @@ async fn nostr_server(
                 if query_result.event == "EOSE" {
                     let send_str = format!("[\"EOSE\",\"{subesc}\"]");
                     ws_stream.send(Message::Text(send_str)).await.ok();
-                } else {
-                    if allowed_to_send(&query_result.event, &conn, &settings) {
-                        metrics.sent_events.with_label_values(&["db"]).inc();
-                        client_received_event_count += 1;
-                        // send a result
-                        let send_str = format!("[\"EVENT\",\"{}\",{}]", subesc, &query_result.event);
-                        ws_stream.send(Message::Text(send_str)).await.ok();
-                    }
+                } else if allowed_to_send(&query_result.event, &conn, &settings) {
+                    metrics.sent_events.with_label_values(&["db"]).inc();
+                    client_received_event_count += 1;
+                    // send a result
+                    let send_str = format!("[\"EVENT\",\"{}\",{}]", subesc, &query_result.event);
+                    ws_stream.send(Message::Text(send_str)).await.ok();
                 }
             },
             // TODO: consider logging the LaggedRecv error
@@ -1278,7 +1276,7 @@ async fn nostr_server(
                                     // check if the event is too far in the future.
                                 } else if e.is_valid_timestamp(settings.options.reject_future_seconds) {
                                     // Write this to the database.
-                                    let auth_pubkey = conn.auth_pubkey().and_then(|pubkey| hex::decode(&pubkey).ok());
+                                    let auth_pubkey = conn.auth_pubkey().and_then(|pubkey| hex::decode(pubkey).ok());
                                     let submit_event = SubmittedEvent {
                                         event: e.clone(),
                                         notice_tx: notice_tx.clone(),
@@ -1307,7 +1305,7 @@ async fn nostr_server(
                                             error!("AUTH command received, but relay_url is not set in the config file (cid: {})", cid);
                                         },
                                         Some(relay) => {
-                                            match conn.authenticate(&event, &relay) {
+                                            match conn.authenticate(&event, relay) {
                                                 Ok(_) => {
                                                     let pubkey = match conn.auth_pubkey() {
                                                         Some(k) => k.chars().take(8).collect(),
diff --git a/src/utils.rs b/src/utils.rs
index b037c97..b70403e 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -50,15 +50,15 @@ mod tests {
     #[test]
     fn lower_hex() {
         let hexstr = "abcd0123";
-        assert_eq!(is_lower_hex(hexstr), true);
+        assert!(is_lower_hex(hexstr));
     }
 
     #[test]
     fn nip19() {
         let hexkey = "3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d";
         let nip19key = "npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6";
-        assert_eq!(is_nip19(hexkey), false);
-        assert_eq!(is_nip19(nip19key), true);
+        assert!(!is_nip19(hexkey));
+        assert!(is_nip19(nip19key));
     }
 
     #[test]
diff --git a/tests/conn.rs b/tests/conn.rs
index 9a12859..b6d7bcf 100644
--- a/tests/conn.rs
+++ b/tests/conn.rs
@@ -334,9 +334,9 @@ mod tests {
             id: "0".to_owned(),
             pubkey: public_key.to_hex(),
             delegated_by: None,
-            created_at: created_at,
-            kind: kind,
-            tags: tags,
+            created_at,
+            kind,
+            tags,
             content: "".to_owned(),
             sig: "0".to_owned(),
             tagidx: None,