diff --git a/src/bdk.udl b/src/bdk.udl
index cbc79a6..4ceb2c3 100644
--- a/src/bdk.udl
+++ b/src/bdk.udl
@@ -101,4 +101,6 @@ interface OnlineWallet {
     Network get_network();
     [Throws=BdkError]
     void sync(BdkProgress progress_update, u32? max_address_param);
+    [Throws=BdkError]
+    u64 get_balance();
 };
diff --git a/src/lib.rs b/src/lib.rs
index 7204fcd..ab4398b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -149,6 +149,10 @@ impl OnlineWallet {
             .unwrap()
             .sync(BdkProgressHolder { progress_update }, max_address_param)
     }
+
+    fn get_balance(&self) -> Result<u64, Error> {
+        self.wallet.lock().unwrap().get_balance()
+    }
 }
 
 uniffi::deps::static_assertions::assert_impl_all!(OfflineWallet: Sync, Send);