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Drop a pile of Arcs and OutputSweeper::new_with_kv_store_sync #4119

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Merged
merged 6 commits into from
Sep 25, 2025
Merged

Drop a pile of Arcs and OutputSweeper::new_with_kv_store_sync #4119

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f53c5e9
Drop unnecessary Arcs in Sweeper and LiquidityManager sync wrappers
TheBlueMatt Sep 23, 2025
d665bef
Drop unnecessary 'static bounds on BP async methods
TheBlueMatt Sep 23, 2025
603f901
Drop unnecessary `Arc`s around `KVStoreWrapper`
TheBlueMatt Sep 23, 2025
552cd39
Drop `Arc`s around `lightning-liquidity`'s `DefaultTimeProvider`
TheBlueMatt Sep 24, 2025
b68f128
Allow passing an `OutputSweeperSync` to the sync-KVStore-async-BP
TheBlueMatt Sep 24, 2025
5e679b4
Drop unnecessary `Arc`s in `lightning-liquidity`'s `EventQueue`
TheBlueMatt Sep 24, 2025
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51 changes: 43 additions & 8 deletions lightning-background-processor/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1846,11 +1846,13 @@ mod tests {
SCORER_PERSISTENCE_SECONDARY_NAMESPACE,
};
use lightning::util::ser::Writeable;
use lightning::util::sweep::{OutputSpendStatus, OutputSweeperSync, PRUNE_DELAY_BLOCKS};
use lightning::util::sweep::{
OutputSpendStatus, OutputSweeper, OutputSweeperSync, PRUNE_DELAY_BLOCKS,
};
use lightning::util::test_utils;
use lightning::{get_event, get_event_msg};
use lightning_liquidity::utils::time::DefaultTimeProvider;
use lightning_liquidity::{ALiquidityManagerSync, LiquidityManagerSync};
use lightning_liquidity::{ALiquidityManagerSync, LiquidityManager, LiquidityManagerSync};
use lightning_persister::fs_store::FilesystemStore;
use lightning_rapid_gossip_sync::RapidGossipSync;
use std::collections::VecDeque;
Expand Down Expand Up @@ -2781,6 +2783,17 @@ mod tests {
);
let kv_store = Arc::new(KVStoreSyncWrapper(kv_store_sync));

// Yes, you can unsafe { turn off the borrow checker }
let lm_async: &'static LiquidityManager<_, _, _, _, _, _> = unsafe {
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This commit has a nice end result, but this - I am not sure how many devs understand it...

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I hope the comment is clear enough? Easy to just update the comment later if it makes it more readable.

&*(nodes[0].liquidity_manager.get_lm_async()
as *const LiquidityManager<_, _, _, _, _, _>)
as &'static LiquidityManager<_, _, _, _, _, _>
};
let sweeper_async: &'static OutputSweeper<_, _, _, _, _, _, _> = unsafe {
&*(nodes[0].sweeper.sweeper_async() as *const OutputSweeper<_, _, _, _, _, _, _>)
as &'static OutputSweeper<_, _, _, _, _, _, _>
};

let bp_future = super::process_events_async(
kv_store,
|_: _| async { Ok(()) },
Expand All @@ -2789,8 +2802,8 @@ mod tests {
Some(Arc::clone(&nodes[0].messenger)),
nodes[0].rapid_gossip_sync(),
Arc::clone(&nodes[0].peer_manager),
Some(nodes[0].liquidity_manager.get_lm_async()),
Some(nodes[0].sweeper.sweeper_async()),
Some(lm_async),
Some(sweeper_async),
Arc::clone(&nodes[0].logger),
Some(Arc::clone(&nodes[0].scorer)),
move |dur: Duration| {
Expand Down Expand Up @@ -3289,6 +3302,17 @@ mod tests {
Arc::new(Persister::new(data_dir).with_graph_persistence_notifier(sender));
let kv_store = Arc::new(KVStoreSyncWrapper(kv_store_sync));

// Yes, you can unsafe { turn off the borrow checker }
let lm_async: &'static LiquidityManager<_, _, _, _, _, _> = unsafe {
&*(nodes[0].liquidity_manager.get_lm_async()
as *const LiquidityManager<_, _, _, _, _, _>)
as &'static LiquidityManager<_, _, _, _, _, _>
};
let sweeper_async: &'static OutputSweeper<_, _, _, _, _, _, _> = unsafe {
&*(nodes[0].sweeper.sweeper_async() as *const OutputSweeper<_, _, _, _, _, _, _>)
as &'static OutputSweeper<_, _, _, _, _, _, _>
};

let (exit_sender, exit_receiver) = tokio::sync::watch::channel(());
let bp_future = super::process_events_async(
kv_store,
Expand All @@ -3298,8 +3322,8 @@ mod tests {
Some(Arc::clone(&nodes[0].messenger)),
nodes[0].rapid_gossip_sync(),
Arc::clone(&nodes[0].peer_manager),
Some(nodes[0].liquidity_manager.get_lm_async()),
Some(nodes[0].sweeper.sweeper_async()),
Some(lm_async),
Some(sweeper_async),
Arc::clone(&nodes[0].logger),
Some(Arc::clone(&nodes[0].scorer)),
move |dur: Duration| {
Expand Down Expand Up @@ -3505,6 +3529,17 @@ mod tests {

let (exit_sender, exit_receiver) = tokio::sync::watch::channel(());

// Yes, you can unsafe { turn off the borrow checker }
let lm_async: &'static LiquidityManager<_, _, _, _, _, _> = unsafe {
&*(nodes[0].liquidity_manager.get_lm_async()
as *const LiquidityManager<_, _, _, _, _, _>)
as &'static LiquidityManager<_, _, _, _, _, _>
};
let sweeper_async: &'static OutputSweeper<_, _, _, _, _, _, _> = unsafe {
&*(nodes[0].sweeper.sweeper_async() as *const OutputSweeper<_, _, _, _, _, _, _>)
as &'static OutputSweeper<_, _, _, _, _, _, _>
};

let bp_future = super::process_events_async(
kv_store,
event_handler,
Expand All @@ -3513,8 +3548,8 @@ mod tests {
Some(Arc::clone(&nodes[0].messenger)),
nodes[0].no_gossip_sync(),
Arc::clone(&nodes[0].peer_manager),
Some(nodes[0].liquidity_manager.get_lm_async()),
Some(nodes[0].sweeper.sweeper_async()),
Some(lm_async),
Some(sweeper_async),
Arc::clone(&nodes[0].logger),
Some(Arc::clone(&nodes[0].scorer)),
move |dur: Duration| {
Expand Down
40 changes: 18 additions & 22 deletions lightning-liquidity/src/manager.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -195,15 +195,13 @@ pub trait ALiquidityManagerSync {
#[cfg(any(test, feature = "_test_utils"))]
fn get_lm_async(
&self,
) -> Arc<
LiquidityManager<
Self::ES,
Self::NS,
Self::CM,
Self::C,
Arc<KVStoreSyncWrapper<Self::KS>>,
Self::TP,
>,
) -> &LiquidityManager<
Self::ES,
Self::NS,
Self::CM,
Self::C,
Arc<KVStoreSyncWrapper<Self::KS>>,
Self::TP,
>;
/// Returns a reference to the actual [`LiquidityManager`] object.
fn get_lm(
Expand Down Expand Up @@ -243,17 +241,15 @@ where
#[cfg(any(test, feature = "_test_utils"))]
fn get_lm_async(
&self,
) -> Arc<
LiquidityManager<
Self::ES,
Self::NS,
Self::CM,
Self::C,
Arc<KVStoreSyncWrapper<Self::KS>>,
Self::TP,
>,
) -> &LiquidityManager<
Self::ES,
Self::NS,
Self::CM,
Self::C,
Arc<KVStoreSyncWrapper<Self::KS>>,
Self::TP,
> {
Arc::clone(&self.inner)
&self.inner
}
fn get_lm(&self) -> &LiquidityManagerSync<ES, NS, CM, C, KS, TP> {
self
Expand Down Expand Up @@ -1040,7 +1036,7 @@ pub struct LiquidityManagerSync<
KS::Target: KVStoreSync,
TP::Target: TimeProvider,
{
inner: Arc<LiquidityManager<ES, NS, CM, C, Arc<KVStoreSyncWrapper<KS>>, TP>>,
inner: LiquidityManager<ES, NS, CM, C, Arc<KVStoreSyncWrapper<KS>>, TP>,
}

#[cfg(feature = "time")]
Expand Down Expand Up @@ -1089,7 +1085,7 @@ where
unreachable!("LiquidityManager::new should not be pending in a sync context");
},
}?;
Ok(Self { inner: Arc::new(inner) })
Ok(Self { inner })
}
}

Expand Down Expand Up @@ -1140,7 +1136,7 @@ where
unreachable!("LiquidityManager::new should not be pending in a sync context");
},
}?;
Ok(Self { inner: Arc::new(inner) })
Ok(Self { inner })
}

/// Returns a reference to the LSPS0 client-side handler.
Expand Down
40 changes: 18 additions & 22 deletions lightning/src/util/sweep.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -981,16 +981,14 @@ where
L::Target: Logger,
O::Target: OutputSpender,
{
sweeper: Arc<
OutputSweeper<
B,
Arc<ChangeDestinationSourceSyncWrapper<D>>,
E,
F,
Arc<KVStoreSyncWrapper<K>>,
L,
O,
>,
sweeper: OutputSweeper<
B,
Arc<ChangeDestinationSourceSyncWrapper<D>>,
E,
F,
Arc<KVStoreSyncWrapper<K>>,
L,
O,
>,
}

Expand Down Expand Up @@ -1025,7 +1023,7 @@ where
kv_store,
logger,
);
Self { sweeper: Arc::new(sweeper) }
Self { sweeper }
}

/// Regenerates and broadcasts the spending transaction for any outputs that are pending. Wraps
Expand Down Expand Up @@ -1074,18 +1072,16 @@ where
#[cfg(any(test, feature = "_test_utils"))]
pub fn sweeper_async(
&self,
) -> Arc<
OutputSweeper<
B,
Arc<ChangeDestinationSourceSyncWrapper<D>>,
E,
F,
Arc<KVStoreSyncWrapper<K>>,
L,
O,
>,
) -> &OutputSweeper<
B,
Arc<ChangeDestinationSourceSyncWrapper<D>>,
E,
F,
Arc<KVStoreSyncWrapper<K>>,
L,
O,
> {
Arc::clone(&self.sweeper)
&self.sweeper
}
}

Expand Down