Add is_linking() api

src/api.rs

@@ -231,6 +231,17 @@ pub fn create_new_device(birthday: u32, network_str: String) -> ApiResult<String
     Ok(our_address)
 }
 
+#[wasm_bindgen]
+pub fn is_linking() -> ApiResult<bool> {
+    let local_device = lock_local_device()?;
+
+    if local_device.is_linked() || local_device.is_linking() {
+        Ok(true)
+    } else {
+        Ok(false)
+    }
+}
+
 #[wasm_bindgen]
 pub fn pair_device(commitment_tx: String, mut sp_addresses: Vec<String>) -> ApiResult<()> {
     let mut local_device = lock_local_device()?;