feat: expose staged and take_staged on Wallet

Author: reez

bdk-ffi/src/wallet.rs

@@ -6,7 +6,7 @@ use crate::error::{
 };
 use crate::store::{PersistenceType, Persister};
 use crate::types::{
-    AddressInfo, Balance, BlockId, CanonicalTx, EvictedTx, FullScanRequestBuilder,
+    AddressInfo, Balance, BlockId, CanonicalTx, ChangeSet, EvictedTx, FullScanRequestBuilder,
     KeychainAndIndex, LocalOutput, Policy, SentAndReceivedValues, SignOptions, SyncRequestBuilder,
     UnconfirmedTx, Update,
 };
@@ -542,6 +542,20 @@ impl Wallet {
             })
     }
 
+    /// Get a reference of the staged [`ChangeSet`] that is yet to be committed (if any).
+    pub fn staged(&self) -> Option<Arc<ChangeSet>> {
+        self.get_wallet()
+            .staged()
+            .map(|changeset| Arc::new(changeset.clone().into()))
+    }
+
+    /// Take the staged [`ChangeSet`] to be persisted now (if any).
+    pub fn take_staged(&self) -> Option<Arc<ChangeSet>> {
+        self.get_wallet()
+            .take_staged()
+            .map(|changeset| Arc::new(changeset.into()))
+    }
+
     /// Returns the latest checkpoint.
     pub fn latest_checkpoint(&self) -> BlockId {
         self.get_wallet().latest_checkpoint().block_id().into()