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stop wallet scans when wallet disappears #699

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stop wallet scans when wallet disappears #699

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825cbd7
stop wallet scans when wallet disappears
Sandipmandal25 Apr 22, 2026
9c30381
fix: drop stale scan results using a generation counter
Sandipmandal25 Apr 24, 2026
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25 changes: 21 additions & 4 deletions rust/src/manager/wallet_manager/actor.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,7 @@ pub struct WalletActor {

seed: u64,
transaction_watchers: HashMap<Txid, Addr<TransactionWatcher>>,
scan_task: Option<tokio::task::AbortHandle>,

// cached values, source of truth is the redb database saved with wallet metadata
last_scan_finished: Option<Duration>,
Expand Down Expand Up @@ -174,6 +175,7 @@ impl WalletActor {
last_height_fetched: None,
state: ActorState::Initial,
transaction_watchers: HashMap::default(),
scan_task: None,
db,
})
}
Expand Down Expand Up @@ -937,8 +939,11 @@ impl WalletActor {

pub async fn stop_all_scans(&mut self) {
debug!("stop_all_scans");
if let Some(handle) = self.scan_task.take() {
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handle.abort();
}
self.state = ActorState::Initial;
self.transaction_watchers = HashMap::default();
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// TODO: stop the wallet scans too, need to save the task handle when we start the scan
}
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async fn remove_watcher_for_txn(&mut self, tx_id: Txid) {
Expand Down Expand Up @@ -1150,7 +1155,7 @@ impl WalletActor {
let (full_scan_request, graph, node_client) = self.get_for_full_scan().await?;

let addr = self.addr.clone();
self.addr.send_fut(async move {
let handle = cove_tokio::task::spawn(async move {
let start = UNIX_EPOCH.elapsed().unwrap().as_secs();

let full_scan_result = node_client
Expand All @@ -1166,6 +1171,9 @@ impl WalletActor {
// perform next scan
send!(addr.maybe_perform_expanded_full_scan());
});
if let Some(old) = self.scan_task.replace(handle.abort_handle()) {
old.abort();
}

Produces::ok(())
}
Expand All @@ -1177,7 +1185,7 @@ impl WalletActor {
let (full_scan_request, graph, node_client) = self.get_for_full_scan().await?;

let addr = self.addr.clone();
self.addr.send_fut(async move {
let handle = cove_tokio::task::spawn(async move {
let start = UNIX_EPOCH.elapsed().unwrap().as_secs();

let full_scan_result = node_client
Expand All @@ -1190,6 +1198,9 @@ impl WalletActor {
// update wallet state
send!(addr.handle_full_scan_complete(full_scan_result, FULL_SCAN_TYPE));
});
if let Some(old) = self.scan_task.replace(handle.abort_handle()) {
old.abort();
}

Produces::ok(())
}
Expand Down Expand Up @@ -1217,7 +1228,7 @@ impl WalletActor {
let graph = self.wallet.bdk.tx_graph().clone();

let addr = self.addr.clone();
self.addr.send_fut(async move {
let handle = cove_tokio::task::spawn(async move {
let scan_result =
node_client.start_wallet_scan(&graph, full_scan_request, GAP_LIMIT as usize).await;

Expand All @@ -1227,6 +1238,9 @@ impl WalletActor {
// update wallet state
send!(addr.handle_incremental_scan_complete(scan_result));
});
if let Some(old) = self.scan_task.replace(handle.abort_handle()) {
old.abort();
}

Produces::ok(())
}
Expand Down Expand Up @@ -1438,6 +1452,9 @@ impl WalletActor {
impl Drop for WalletActor {
fn drop(&mut self) {
debug!("[DROP] Wallet Actor for {}", self.wallet.id);
if let Some(handle) = self.scan_task.take() {
handle.abort();
}
}
}

Expand Down