diff --git a/src/client_server/account.rs b/src/client_server/account.rs
index f48543e..ab90de5 100644
--- a/src/client_server/account.rs
+++ b/src/client_server/account.rs
@@ -15,13 +15,10 @@ use ruma::{
         },
     },
     events::{
-        room::canonical_alias,
-        room::guest_access,
-        room::history_visibility,
-        room::join_rules,
-        room::member,
-        room::name,
-        room::{message, topic},
+        room::{
+            canonical_alias, guest_access, history_visibility, join_rules, member, message, name,
+            topic,
+        },
         EventType,
     },
     RoomAliasId, RoomId, RoomVersionId, UserId,
diff --git a/src/client_server/directory.rs b/src/client_server/directory.rs
index 048b410..d8af2e3 100644
--- a/src/client_server/directory.rs
+++ b/src/client_server/directory.rs
@@ -15,9 +15,7 @@ use ruma::{
         },
         federation,
     },
-    directory::Filter,
-    directory::RoomNetwork,
-    directory::{IncomingFilter, IncomingRoomNetwork, PublicRoomsChunk},
+    directory::{Filter, IncomingFilter, IncomingRoomNetwork, PublicRoomsChunk, RoomNetwork},
     events::{
         room::{avatar, canonical_alias, guest_access, history_visibility, name, topic},
         EventType,
diff --git a/src/client_server/membership.rs b/src/client_server/membership.rs
index 50a8cca..0e6235f 100644
--- a/src/client_server/membership.rs
+++ b/src/client_server/membership.rs
@@ -17,15 +17,12 @@ use ruma::{
         },
         federation,
     },
-    events::pdu::Pdu,
-    events::{room::member, EventType},
+    events::{pdu::Pdu, room::member, EventType},
     EventId, Raw, RoomId, RoomVersionId, ServerName, UserId,
 };
 use state_res::StateEvent;
 use std::{
-    collections::BTreeMap,
-    collections::HashMap,
-    collections::HashSet,
+    collections::{BTreeMap, HashMap, HashSet},
     convert::{TryFrom, TryInto},
     iter,
     sync::Arc,
diff --git a/src/client_server/state.rs b/src/client_server/state.rs
index 3777862..010b20d 100644
--- a/src/client_server/state.rs
+++ b/src/client_server/state.rs
@@ -9,9 +9,8 @@ use ruma::{
         },
     },
     events::{
-        room::history_visibility::HistoryVisibility,
-        room::history_visibility::HistoryVisibilityEventContent, AnyStateEventContent,
-        EventContent, EventType,
+        room::history_visibility::{HistoryVisibility, HistoryVisibilityEventContent},
+        AnyStateEventContent, EventContent, EventType,
     },
     EventId, RoomId, UserId,
 };
@@ -103,6 +102,7 @@ pub async fn get_state_events_route(
 ) -> ConduitResult<get_state_events::Response> {
     let sender_user = body.sender_user.as_ref().expect("user is authenticated");
 
+    #[allow(clippy::blocks_in_if_conditions)]
     // Users not in the room should not be able to access the state unless history_visibility is
     // WorldReadable
     if !db.rooms.is_joined(sender_user, &body.room_id)?
@@ -148,6 +148,7 @@ pub async fn get_state_events_for_key_route(
 ) -> ConduitResult<get_state_events_for_key::Response> {
     let sender_user = body.sender_user.as_ref().expect("user is authenticated");
 
+    #[allow(clippy::blocks_in_if_conditions)]
     // Users not in the room should not be able to access the state unless history_visibility is
     // WorldReadable
     if !db.rooms.is_joined(sender_user, &body.room_id)?
@@ -198,6 +199,7 @@ pub async fn get_state_events_for_empty_key_route(
 ) -> ConduitResult<get_state_events_for_empty_key::Response> {
     let sender_user = body.sender_user.as_ref().expect("user is authenticated");
 
+    #[allow(clippy::blocks_in_if_conditions)]
     // Users not in the room should not be able to access the state unless history_visibility is
     // WorldReadable
     if !db.rooms.is_joined(sender_user, &body.room_id)?
diff --git a/src/database/sending.rs b/src/database/sending.rs
index e3fca4f..c108e7e 100644
--- a/src/database/sending.rs
+++ b/src/database/sending.rs
@@ -116,6 +116,7 @@ impl Sending {
                                 }
                             }
                             Err((_server, _e)) => {
+                                log::error!("server: {}\nerror: {}", _server, _e)
                                 // TODO: exponential backoff
                             }
                         };
@@ -131,7 +132,7 @@ impl Sending {
                                         .expect("splitn will always return 1 or more elements"),
                                 )
                                 .map_err(|_| Error::bad_database("ServerName in servernamepduid bytes are invalid."))
-                                .and_then(|server_str|Box::<ServerName>::try_from(server_str)
+                                .and_then(|server_str| Box::<ServerName>::try_from(server_str)
                                     .map_err(|_| Error::bad_database("ServerName in servernamepduid is invalid.")))
                                 .ok()
                                 .and_then(|server| parts
@@ -162,7 +163,7 @@ impl Sending {
         });
     }
 
-    pub fn send_pdu(&self, server: Box<ServerName>, pdu_id: &[u8]) -> Result<()> {
+    pub fn send_pdu(&self, server: &ServerName, pdu_id: &[u8]) -> Result<()> {
         let mut key = server.as_bytes().to_vec();
         key.push(0xff);
         key.extend_from_slice(pdu_id);
diff --git a/src/ruma_wrapper.rs b/src/ruma_wrapper.rs
index 8dfd208..1c5529a 100644
--- a/src/ruma_wrapper.rs
+++ b/src/ruma_wrapper.rs
@@ -4,7 +4,10 @@ use ruma::{
     identifiers::{DeviceId, UserId},
     Outgoing,
 };
-use std::{convert::TryFrom, convert::TryInto, ops::Deref};
+use std::{
+    convert::{TryFrom, TryInto},
+    ops::Deref,
+};
 
 #[cfg(feature = "conduit_bin")]
 use {
diff --git a/src/utils.rs b/src/utils.rs
index 452b7c5..e65ec86 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -89,9 +89,23 @@ pub fn common_elements(
                         }
                     }
                 }
-
                 false
             })
             .all(|b| b)
     }))
 }
+
+#[test]
+fn sled_tests() {
+    let db = sled::Config::new().temporary(true).open().unwrap();
+
+    db.insert(1_u64.to_be_bytes(), vec![10]).unwrap();
+    db.insert(2_u64.to_be_bytes(), vec![20]).unwrap();
+    db.insert(3_u64.to_be_bytes(), vec![30]).unwrap();
+
+    let mut key = 1_u64.to_be_bytes().to_vec();
+    key.push(1);
+    db.insert(key, vec![40]).unwrap();
+
+    println!("{:?}", db.iter().collect::<Result<Vec<_>, _>>().unwrap())
+}