diff --git a/src-tauri/src/main.rs b/src-tauri/src/main.rs
index 0d270c49..3d9ece47 100644
--- a/src-tauri/src/main.rs
+++ b/src-tauri/src/main.rs
@@ -8,12 +8,14 @@ pub mod nostr;
 
 use nostr_sdk::{Client, ClientBuilder};
 use nostr_sqlite::SQLiteDatabase;
+use std::sync::Arc;
 use tauri::Manager;
 use tauri_plugin_autostart::MacosLauncher;
 use tauri_plugin_theme::ThemePlugin;
-use tokio::sync::Mutex;
 
-struct NostrClient(Mutex<Client>);
+pub struct AppState {
+  pub nostr: Arc<Client>,
+}
 
 fn main() {
   let mut ctx = tauri::generate_context!();
@@ -24,12 +26,12 @@ fn main() {
 
       tauri::async_runtime::spawn(async move {
         // Create database connection
-        let database = SQLiteDatabase::open(config_dir.join("nostr.db"))
+        let nostr_db = SQLiteDatabase::open(config_dir.join("nostr.db"))
           .await
           .expect("Open database failed.");
 
         // Create nostr connection
-        let client = ClientBuilder::default().database(database).build();
+        let client = ClientBuilder::default().database(nostr_db).build();
 
         // Add bootstrap relay
         client
@@ -47,7 +49,9 @@ fn main() {
         client.connect().await;
 
         // Init global state
-        handle.manage(NostrClient(client.into()))
+        handle.manage(AppState {
+          nostr: client.into(),
+        })
       });
 
       Ok(())
@@ -71,6 +75,9 @@ fn main() {
     .invoke_handler(tauri::generate_handler![
       nostr::keys::create_keys,
       nostr::keys::get_public_key,
+      nostr::keys::update_signer,
+      nostr::metadata::get_metadata,
+      nostr::event::get_event,
       commands::secret::secure_save,
       commands::secret::secure_load,
       commands::secret::secure_remove,
diff --git a/src-tauri/src/nostr.rs b/src-tauri/src/nostr.rs
index 703bc087..35697966 100644
--- a/src-tauri/src/nostr.rs
+++ b/src-tauri/src/nostr.rs
@@ -1 +1,3 @@
+pub mod event;
 pub mod keys;
+pub mod metadata;
diff --git a/src-tauri/src/nostr/event.rs b/src-tauri/src/nostr/event.rs
new file mode 100644
index 00000000..0a3bc97a
--- /dev/null
+++ b/src-tauri/src/nostr/event.rs
@@ -0,0 +1,20 @@
+use crate::AppState;
+use nostr_sdk::prelude::*;
+use std::time::Duration;
+use tauri::State;
+
+#[tauri::command(async)]
+pub async fn get_event(id: String, app_state: State<'_, AppState>) -> Result<String, ()> {
+  let client = &app_state.nostr;
+
+  let event_id = EventId::from_bech32(id).unwrap();
+  let filter = Filter::new().id(event_id);
+
+  let events = client
+    .get_events_of(vec![filter], Some(Duration::from_secs(10)))
+    .await
+    .expect("Get metadata failed");
+  let event = events.into_iter().nth(0).unwrap().as_json();
+
+  Ok(event)
+}
diff --git a/src-tauri/src/nostr/keys.rs b/src-tauri/src/nostr/keys.rs
index d5af2054..06fd3098 100644
--- a/src-tauri/src/nostr/keys.rs
+++ b/src-tauri/src/nostr/keys.rs
@@ -1,6 +1,9 @@
+use crate::AppState;
 use nostr::nips::nip19::ToBech32;
 use nostr::secp256k1::SecretKey;
-use nostr::{Keys, Result};
+use nostr::{FromBech32, Keys, Result};
+use nostr_sdk::ClientSigner;
+use tauri::State;
 
 #[derive(serde::Serialize)]
 pub struct CreateKeysResponse {
@@ -27,3 +30,15 @@ pub fn get_public_key(secret_key: SecretKey) -> Result<String, ()> {
   let keys = Keys::new(secret_key);
   Ok(keys.public_key().to_bech32().expect("secret key failed"))
 }
+
+#[tauri::command]
+pub async fn update_signer(key: String, app_state: State<'_, AppState>) -> Result<(), ()> {
+  let client = &app_state.nostr;
+  let secret_key = SecretKey::from_bech32(key).unwrap();
+  let keys = Keys::new(secret_key);
+  let signer = ClientSigner::Keys(keys);
+
+  client.set_signer(Some(signer)).await;
+
+  Ok(())
+}
diff --git a/src-tauri/src/nostr/metadata.rs b/src-tauri/src/nostr/metadata.rs
new file mode 100644
index 00000000..e0dd50ae
--- /dev/null
+++ b/src-tauri/src/nostr/metadata.rs
@@ -0,0 +1,26 @@
+use crate::AppState;
+use nostr_sdk::prelude::*;
+use std::time::Duration;
+use tauri::State;
+
+#[tauri::command(async)]
+pub async fn get_metadata(npub: String, app_state: State<'_, AppState>) -> Result<Metadata, ()> {
+  let client = &app_state.nostr;
+
+  let public_key = XOnlyPublicKey::from_bech32(npub).unwrap();
+
+  let filter = Filter::new()
+    .author(public_key)
+    .kind(Kind::Metadata)
+    .limit(1);
+
+  let events = client
+    .get_events_of(vec![filter], Some(Duration::from_secs(10)))
+    .await
+    .expect("Get metadata failed");
+
+  let event = events.into_iter().nth(0).unwrap();
+  let metadata: Metadata = Metadata::from_json(&event.content).unwrap();
+
+  Ok(metadata)
+}