diff --git a/kordophone/src/api/http_client.rs b/kordophone/src/api/http_client.rs
index 8d58724..e0f4249 100644
--- a/kordophone/src/api/http_client.rs
+++ b/kordophone/src/api/http_client.rs
@@ -16,7 +16,7 @@ use tokio::net::TcpStream;
 
 use futures_util::stream::{BoxStream, Stream};
 use futures_util::task::Context;
-use futures_util::{SinkExt, StreamExt, TryStreamExt};
+use futures_util::{StreamExt, TryStreamExt};
 
 use tokio_tungstenite::connect_async;
 use tokio_tungstenite::{MaybeTlsStream, WebSocketStream};
diff --git a/kordophone/src/api/mod.rs b/kordophone/src/api/mod.rs
index b0326db..0f63308 100644
--- a/kordophone/src/api/mod.rs
+++ b/kordophone/src/api/mod.rs
@@ -16,8 +16,7 @@ pub mod event_socket;
 pub use event_socket::EventSocket;
 
 use self::http_client::Credentials;
-use core::error::Error as StdError;
-use std::{fmt::Debug, io::BufRead};
+use std::fmt::Debug;
 
 #[async_trait]
 pub trait APIInterface {
diff --git a/kordophone/src/tests/test_client.rs b/kordophone/src/tests/test_client.rs
index a9f548e..a8ca377 100644
--- a/kordophone/src/tests/test_client.rs
+++ b/kordophone/src/tests/test_client.rs
@@ -16,6 +16,7 @@ use crate::{
 
 use futures_util::stream::BoxStream;
 use futures_util::StreamExt;
+use bytes::Bytes;
 
 pub struct TestClient {
     pub version: &'static str,
@@ -67,6 +68,7 @@ impl EventSocket for TestEventSocket {
 #[async_trait]
 impl APIInterface for TestClient {
     type Error = TestError;
+    type ResponseStream = BoxStream<'static, Result<Bytes, TestError>>;
 
     async fn authenticate(&mut self, _credentials: Credentials) -> Result<JwtToken, Self::Error> {
         Ok(JwtToken::dummy())
@@ -118,7 +120,7 @@ impl APIInterface for TestClient {
         Ok(TestEventSocket::new())
     }
 
-    async fn fetch_attachment_data(&mut self, guid: &String) -> Result<Vec<u8>, Self::Error> {
-        Ok(vec![])
+    async fn fetch_attachment_data(&mut self, guid: &String, preview: bool) -> Result<Self::ResponseStream, Self::Error> {
+        Ok(futures_util::stream::iter(vec![Ok(Bytes::from_static(b"test"))]).boxed())
     }
 }
diff --git a/kordophoned/src/daemon/attachment_store.rs b/kordophoned/src/daemon/attachment_store.rs
index e0cd3a7..6395ea0 100644
--- a/kordophoned/src/daemon/attachment_store.rs
+++ b/kordophoned/src/daemon/attachment_store.rs
@@ -9,7 +9,6 @@ use kordophone::APIInterface;
 use thiserror::Error;
 
 use kordophone_db::database::Database;
-use kordophone_db::database::DatabaseAccess;
 
 use crate::daemon::events::Event;
 use crate::daemon::events::Reply;
@@ -21,7 +20,6 @@ use tokio::sync::Mutex;
 use tokio::sync::mpsc::{Receiver, Sender};
 
 use tokio::pin;
-use tokio::time::Duration;
 
 mod target {
     pub static ATTACHMENTS: &str = "attachments";
diff --git a/kordophoned/src/daemon/auth_store.rs b/kordophoned/src/daemon/auth_store.rs
index 283b169..35a789a 100644
--- a/kordophoned/src/daemon/auth_store.rs
+++ b/kordophoned/src/daemon/auth_store.rs
@@ -5,7 +5,6 @@ use std::sync::Arc;
 use tokio::sync::Mutex;
 
 use kordophone::api::{http_client::Credentials, AuthenticationStore};
-use kordophone::model::JwtToken;
 use kordophone_db::database::{Database, DatabaseAccess};
 
 use async_trait::async_trait;
diff --git a/kordophoned/src/daemon/mod.rs b/kordophoned/src/daemon/mod.rs
index c735034..3f64f3c 100644
--- a/kordophoned/src/daemon/mod.rs
+++ b/kordophoned/src/daemon/mod.rs
@@ -13,7 +13,7 @@ use directories::ProjectDirs;
 
 use std::collections::HashMap;
 use std::error::Error;
-use std::path::{Path, PathBuf};
+use std::path::PathBuf;
 use std::sync::Arc;
 
 use thiserror::Error;
diff --git a/kordophoned/src/daemon/models/message.rs b/kordophoned/src/daemon/models/message.rs
index 297dcc7..4735275 100644
--- a/kordophoned/src/daemon/models/message.rs
+++ b/kordophoned/src/daemon/models/message.rs
@@ -2,7 +2,6 @@ use chrono::NaiveDateTime;
 use chrono::DateTime;
 
 use std::collections::HashMap;
-use uuid::Uuid;
 use kordophone::model::message::AttachmentMetadata;
 use kordophone::model::outgoing_message::OutgoingMessage;
 use crate::daemon::models::Attachment;
diff --git a/kordophoned/src/dbus/server_impl.rs b/kordophoned/src/dbus/server_impl.rs
index f66f676..4053a61 100644
--- a/kordophoned/src/dbus/server_impl.rs
+++ b/kordophoned/src/dbus/server_impl.rs
@@ -7,8 +7,7 @@ use tokio::sync::oneshot;
 
 use crate::daemon::{
     events::{Event, Reply},
-    settings::Settings,
-    Attachment, DaemonResult,
+    settings::Settings, DaemonResult,
 };
 
 use crate::dbus::interface::NetBuzzertKordophoneRepository as DbusRepository;