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message_queue.rs
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message_queue.rs
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//! Holds types and traits used to implement message queues for [`LSPSMessage`]s.
use crate::lsps0::msgs::LSPSMessage;
use crate::prelude::{Vec, VecDeque};
use crate::sync::Mutex;
use lightning::ln::peer_handler::APeerManager;
use bitcoin::secp256k1::PublicKey;
use core::ops::Deref;
/// Represents a simple message queue that the LSPS message handlers use to send messages to a given counterparty.
pub trait MessageQueue {
/// Enqueues an LSPS message to be sent to the counterparty with the given node id.
///
/// Implementations need to take care of message delivery to the counterparty via the
/// LSPS0/BOLT8 transport protocol.
fn enqueue(&self, counterparty_node_id: &PublicKey, msg: LSPSMessage);
}
/// The default [`MessageQueue`] Implementation used by [`LiquidityManager`].
///
/// [`LiquidityManager`]: crate::LiquidityManager
pub struct DefaultMessageQueue<PM: Deref>
where
PM::Target: APeerManager,
{
queue: Mutex<VecDeque<(PublicKey, LSPSMessage)>>,
peer_manager: Mutex<Option<PM>>,
}
impl<PM: Deref> DefaultMessageQueue<PM>
where
PM::Target: APeerManager,
{
pub(crate) fn new() -> Self {
let queue = Mutex::new(VecDeque::new());
let peer_manager = Mutex::new(None);
Self { queue, peer_manager }
}
pub(crate) fn get_and_clear_pending_msgs(&self) -> Vec<(PublicKey, LSPSMessage)> {
self.queue.lock().unwrap().drain(..).collect()
}
pub(crate) fn set_peer_manager(&self, peer_manager: PM) {
*self.peer_manager.lock().unwrap() = Some(peer_manager);
}
}
impl<PM: Deref> MessageQueue for DefaultMessageQueue<PM>
where
PM::Target: APeerManager,
{
fn enqueue(&self, counterparty_node_id: &PublicKey, msg: LSPSMessage) {
{
let mut queue = self.queue.lock().unwrap();
queue.push_back((*counterparty_node_id, msg));
}
if let Some(peer_manager) = self.peer_manager.lock().unwrap().as_ref() {
peer_manager.as_ref().process_events();
}
}
}