add remove signer

crates/state/src/lib.rs

@@ -466,6 +466,27 @@ impl NostrRegistry {
         }));
     }
 
+    /// Remove a signer from the keyring
+    pub fn remove_signer(&mut self, public_key: &PublicKey, cx: &mut Context<Self>) {
+        let public_key = public_key.to_owned();
+        let npub = public_key.to_bech32().unwrap();
+        let keys_dir = config_dir().join("keys");
+
+        self.tasks.push(cx.spawn(async move |this, cx| {
+            let key_path = keys_dir.join(format!("{}.npub", npub));
+            smol::fs::remove_file(key_path).await?;
+
+            this.update(cx, |this, cx| {
+                this.npubs().update(cx, |this, cx| {
+                    this.retain(|k| k != &public_key);
+                    cx.notify();
+                });
+            })?;
+
+            Ok(())
+        }));
+    }
+
     /// Add a key signer to keyring
     pub fn add_key_signer(&mut self, keys: &Keys, cx: &mut Context<Self>) {
         let keys = keys.clone();