diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..6433eff
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,8 @@
+repos:
+  - repo: https://github.com/doublify/pre-commit-rust
+    rev: v1.0
+    hooks:
+      - id: fmt
+        args: ["--verbose", "--"]
+      - id: cargo-check
+      - id: clippy
diff --git a/src/connector.rs b/src/connector.rs
index 2bfbafe..77a08ee 100755
--- a/src/connector.rs
+++ b/src/connector.rs
@@ -111,7 +111,7 @@ impl Connector {
             let buf = comms::recv(&mut conn.reader, Some(&mut conn.cipher)).await?;
             let msg = String::from_utf8(buf)?;
 
-            let split: Vec<&str> = msg.split(":").collect();
+            let split: Vec<&str> = msg.split(':').collect();
             let name = split[0].trim().to_string();
             let size: u64 = split[1].trim().parse()?;
             let hash = split[2].trim().to_string();
@@ -149,7 +149,7 @@ impl Connector {
         )
         .await?;
 
-        let mut remaining = req.size.clone();
+        let mut remaining = req.size;
 
         while remaining != 0 {
             let buf = comms::recv(&mut conn.reader, Some(&mut conn.cipher)).await?;
@@ -158,14 +158,13 @@ impl Connector {
             remaining -= buf.len() as u64;
         }
 
-        let msg: Vec<u8>;
         let new_hash = crypto::try_hash(&path)?;
 
-        if new_hash == req.hash {
-            msg = b"OK".to_vec();
+        let msg: Vec<u8> = if new_hash == req.hash {
+            b"OK".to_vec()
         } else {
-            msg = b"ERROR".to_vec();
-        }
+            b"ERROR".to_vec()
+        };
 
         comms::send(
             &mut conn.writer,
diff --git a/src/crypto.rs b/src/crypto.rs
index b2fdcfc..a402a70 100755
--- a/src/crypto.rs
+++ b/src/crypto.rs
@@ -70,7 +70,7 @@ pub fn aes_encrypt(
 }
 
 pub fn aes_decrypt(
-    data: &Vec<u8>,
+    data: &[u8],
     cipher: &mut AesGcm<Aes256, U12>,
 ) -> Result<Vec<u8>, Box<dyn Error + Send + Sync>> {
     let (nonce_bytes, data) = data.split_at(AES_NONCE_SIZE);
diff --git a/src/gui.rs b/src/gui.rs
index e69de29..55b1071 100644
--- a/src/gui.rs
+++ b/src/gui.rs
@@ -0,0 +1 @@
+// placeholder for now
diff --git a/src/listener.rs b/src/listener.rs
index 92b4c47..730a39b 100755
--- a/src/listener.rs
+++ b/src/listener.rs
@@ -7,7 +7,7 @@ use tokio::{
     fs::File,
     io::AsyncReadExt,
     net::{TcpListener, TcpStream},
-    sync::mpsc::{self},
+    sync::mpsc,
 };
 
 #[derive(Debug, Clone, Copy)]
@@ -73,7 +73,7 @@ impl Listener {
             return Ok::<(), Box<dyn Error + Send + Sync>>(());
         }
 
-        let index = self.metadata_handler(&mut connection, &files).await?;
+        let index = self.metadata_handler(&mut connection, files).await?;
         tx.send(Message::ConnectionReady).await?;
         self.request_handler(&mut connection, &index).await?;
         tx.send(Message::ClientDisconnect(addr)).await?;
@@ -120,7 +120,7 @@ impl Listener {
         let mut index = HashMap::new();
 
         for path in files {
-            let split: Vec<&str> = path.split("/").collect(); // TODO: different path delimiters?
+            let split: Vec<&str> = path.split('/').collect(); // TODO: different path delimiters?
             let name = split[split.len() - 1].to_string();
             let handle = File::open(PathBuf::from_str(path)?).await?;
             let size = handle.metadata().await?.len();
@@ -203,7 +203,7 @@ impl Listener {
                 )
                 .await?;
 
-                remaining = remaining - n as u64;
+                remaining -= n as u64;
             }
 
             let buf = comms::recv(&mut conn.reader, Some(&mut conn.cipher)).await?;
diff --git a/src/main.rs b/src/main.rs
index 42e0ffc..6d9c61e 100755
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,4 @@
 use std::error::Error;
-use tokio;
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn Error>> {