2 pub mod bitcoind_client;
9 use crate::bitcoind_client::BitcoindClient;
10 use crate::disk::FilesystemLogger;
11 use bitcoin::blockdata::transaction::Transaction;
12 use bitcoin::consensus::encode;
13 use bitcoin::network::constants::Network;
14 use bitcoin::BlockHash;
15 use bitcoin_bech32::WitnessProgram;
17 use lightning::chain::keysinterface::{
18 EntropySource, InMemorySigner, KeysManager, SpendableOutputDescriptor,
20 use lightning::chain::{chainmonitor, ChannelMonitorUpdateStatus};
21 use lightning::chain::{Filter, Watch};
22 use lightning::events::{Event, PaymentFailureReason, PaymentPurpose};
23 use lightning::ln::channelmanager;
24 use lightning::ln::channelmanager::{
25 ChainParameters, ChannelManagerReadArgs, SimpleArcChannelManager,
27 use lightning::ln::peer_handler::{IgnoringMessageHandler, MessageHandler, SimpleArcPeerManager};
28 use lightning::ln::{PaymentHash, PaymentPreimage, PaymentSecret};
29 use lightning::onion_message::SimpleArcOnionMessenger;
30 use lightning::routing::gossip;
31 use lightning::routing::gossip::{NodeId, P2PGossipSync};
32 use lightning::routing::router::DefaultRouter;
33 use lightning::util::config::UserConfig;
34 use lightning::util::persist::KVStorePersister;
35 use lightning::util::ser::ReadableArgs;
36 use lightning_background_processor::{process_events_async, GossipSync};
37 use lightning_block_sync::init;
38 use lightning_block_sync::poll;
39 use lightning_block_sync::SpvClient;
40 use lightning_block_sync::UnboundedCache;
41 use lightning_net_tokio::SocketDescriptor;
42 use lightning_persister::FilesystemPersister;
43 use rand::{thread_rng, Rng};
44 use std::collections::hash_map::Entry;
45 use std::collections::HashMap;
46 use std::convert::TryInto;
53 use std::sync::atomic::{AtomicBool, Ordering};
54 use std::sync::{Arc, Mutex};
55 use std::time::{Duration, SystemTime};
57 pub(crate) const PENDING_SPENDABLE_OUTPUT_DIR: &'static str = "pending_spendable_outputs";
59 pub(crate) enum HTLCStatus {
65 pub(crate) struct MillisatAmount(Option<u64>);
67 impl fmt::Display for MillisatAmount {
68 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
70 Some(amt) => write!(f, "{}", amt),
71 None => write!(f, "unknown"),
76 pub(crate) struct PaymentInfo {
77 preimage: Option<PaymentPreimage>,
78 secret: Option<PaymentSecret>,
80 amt_msat: MillisatAmount,
83 pub(crate) type PaymentInfoStorage = Arc<Mutex<HashMap<PaymentHash, PaymentInfo>>>;
85 type ChainMonitor = chainmonitor::ChainMonitor<
87 Arc<dyn Filter + Send + Sync>,
90 Arc<FilesystemLogger>,
91 Arc<FilesystemPersister>,
94 pub(crate) type PeerManager = SimpleArcPeerManager<
103 pub(crate) type ChannelManager =
104 SimpleArcChannelManager<ChainMonitor, BitcoindClient, BitcoindClient, FilesystemLogger>;
106 pub(crate) type NetworkGraph = gossip::NetworkGraph<Arc<FilesystemLogger>>;
108 type OnionMessenger = SimpleArcOnionMessenger<FilesystemLogger>;
110 async fn handle_ldk_events(
111 channel_manager: &Arc<ChannelManager>, bitcoind_client: &BitcoindClient,
112 network_graph: &NetworkGraph, keys_manager: &KeysManager,
113 inbound_payments: &PaymentInfoStorage, outbound_payments: &PaymentInfoStorage,
114 persister: &Arc<FilesystemPersister>, network: Network, event: Event,
117 Event::FundingGenerationReady {
118 temporary_channel_id,
119 counterparty_node_id,
120 channel_value_satoshis,
124 // Construct the raw transaction with one output, that is paid the amount of the
126 let addr = WitnessProgram::from_scriptpubkey(
129 Network::Bitcoin => bitcoin_bech32::constants::Network::Bitcoin,
130 Network::Testnet => bitcoin_bech32::constants::Network::Testnet,
131 Network::Regtest => bitcoin_bech32::constants::Network::Regtest,
132 Network::Signet => bitcoin_bech32::constants::Network::Signet,
135 .expect("Lightning funding tx should always be to a SegWit output")
137 let mut outputs = vec![HashMap::with_capacity(1)];
138 outputs[0].insert(addr, channel_value_satoshis as f64 / 100_000_000.0);
139 let raw_tx = bitcoind_client.create_raw_transaction(outputs).await;
141 // Have your wallet put the inputs into the transaction such that the output is
143 let funded_tx = bitcoind_client.fund_raw_transaction(raw_tx).await;
145 // Sign the final funding transaction and broadcast it.
146 let signed_tx = bitcoind_client.sign_raw_transaction_with_wallet(funded_tx.hex).await;
147 assert_eq!(signed_tx.complete, true);
148 let final_tx: Transaction =
149 encode::deserialize(&hex_utils::to_vec(&signed_tx.hex).unwrap()).unwrap();
150 // Give the funding transaction back to LDK for opening the channel.
152 .funding_transaction_generated(
153 &temporary_channel_id,
154 &counterparty_node_id,
160 "\nERROR: Channel went away before we could fund it. The peer disconnected or refused the channel.");
162 io::stdout().flush().unwrap();
165 Event::PaymentClaimable {
171 via_user_channel_id: _,
176 "\nEVENT: received payment from payment hash {} of {} millisatoshis",
177 hex_utils::hex_str(&payment_hash.0),
181 io::stdout().flush().unwrap();
182 let payment_preimage = match purpose {
183 PaymentPurpose::InvoicePayment { payment_preimage, .. } => payment_preimage,
184 PaymentPurpose::SpontaneousPayment(preimage) => Some(preimage),
186 channel_manager.claim_funds(payment_preimage.unwrap());
188 Event::PaymentClaimed { payment_hash, purpose, amount_msat, receiver_node_id: _ } => {
190 "\nEVENT: claimed payment from payment hash {} of {} millisatoshis",
191 hex_utils::hex_str(&payment_hash.0),
195 io::stdout().flush().unwrap();
196 let (payment_preimage, payment_secret) = match purpose {
197 PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
198 (payment_preimage, Some(payment_secret))
200 PaymentPurpose::SpontaneousPayment(preimage) => (Some(preimage), None),
202 let mut payments = inbound_payments.lock().unwrap();
203 match payments.entry(payment_hash) {
204 Entry::Occupied(mut e) => {
205 let payment = e.get_mut();
206 payment.status = HTLCStatus::Succeeded;
207 payment.preimage = payment_preimage;
208 payment.secret = payment_secret;
210 Entry::Vacant(e) => {
211 e.insert(PaymentInfo {
212 preimage: payment_preimage,
213 secret: payment_secret,
214 status: HTLCStatus::Succeeded,
215 amt_msat: MillisatAmount(Some(amount_msat)),
220 Event::PaymentSent { payment_preimage, payment_hash, fee_paid_msat, .. } => {
221 let mut payments = outbound_payments.lock().unwrap();
222 for (hash, payment) in payments.iter_mut() {
223 if *hash == payment_hash {
224 payment.preimage = Some(payment_preimage);
225 payment.status = HTLCStatus::Succeeded;
227 "\nEVENT: successfully sent payment of {} millisatoshis{} from \
228 payment hash {:?} with preimage {:?}",
230 if let Some(fee) = fee_paid_msat {
231 format!(" (fee {} msat)", fee)
235 hex_utils::hex_str(&payment_hash.0),
236 hex_utils::hex_str(&payment_preimage.0)
239 io::stdout().flush().unwrap();
243 Event::OpenChannelRequest { .. } => {
244 // Unreachable, we don't set manually_accept_inbound_channels
246 Event::PaymentPathSuccessful { .. } => {}
247 Event::PaymentPathFailed { .. } => {}
248 Event::ProbeSuccessful { .. } => {}
249 Event::ProbeFailed { .. } => {}
250 Event::PaymentFailed { payment_hash, reason, .. } => {
252 "\nEVENT: Failed to send payment to payment hash {:?}: {:?}",
253 hex_utils::hex_str(&payment_hash.0),
254 if let Some(r) = reason { r } else { PaymentFailureReason::RetriesExhausted }
257 io::stdout().flush().unwrap();
259 let mut payments = outbound_payments.lock().unwrap();
260 if payments.contains_key(&payment_hash) {
261 let payment = payments.get_mut(&payment_hash).unwrap();
262 payment.status = HTLCStatus::Failed;
265 Event::PaymentForwarded {
269 claim_from_onchain_tx,
270 outbound_amount_forwarded_msat,
272 let read_only_network_graph = network_graph.read_only();
273 let nodes = read_only_network_graph.nodes();
274 let channels = channel_manager.list_channels();
276 let node_str = |channel_id: &Option<[u8; 32]>| match channel_id {
277 None => String::new(),
278 Some(channel_id) => match channels.iter().find(|c| c.channel_id == *channel_id) {
279 None => String::new(),
281 match nodes.get(&NodeId::from_pubkey(&channel.counterparty.node_id)) {
282 None => "private node".to_string(),
283 Some(node) => match &node.announcement_info {
284 None => "unnamed node".to_string(),
285 Some(announcement) => {
286 format!("node {}", announcement.alias)
293 let channel_str = |channel_id: &Option<[u8; 32]>| {
295 .map(|channel_id| format!(" with channel {}", hex_utils::hex_str(&channel_id)))
299 format!(" from {}{}", node_str(&prev_channel_id), channel_str(&prev_channel_id));
301 format!(" to {}{}", node_str(&next_channel_id), channel_str(&next_channel_id));
303 let from_onchain_str = if claim_from_onchain_tx {
304 "from onchain downstream claim"
306 "from HTLC fulfill message"
308 let amt_args = if let Some(v) = outbound_amount_forwarded_msat {
313 if let Some(fee_earned) = fee_earned_msat {
315 "\nEVENT: Forwarded payment for {} msat{}{}, earning {} msat {}",
316 amt_args, from_prev_str, to_next_str, fee_earned, from_onchain_str
320 "\nEVENT: Forwarded payment for {} msat{}{}, claiming onchain {}",
321 amt_args, from_prev_str, to_next_str, from_onchain_str
325 io::stdout().flush().unwrap();
327 Event::HTLCHandlingFailed { .. } => {}
328 Event::PendingHTLCsForwardable { time_forwardable } => {
329 let forwarding_channel_manager = channel_manager.clone();
330 let min = time_forwardable.as_millis() as u64;
331 tokio::spawn(async move {
332 let millis_to_sleep = thread_rng().gen_range(min, min * 5) as u64;
333 tokio::time::sleep(Duration::from_millis(millis_to_sleep)).await;
334 forwarding_channel_manager.process_pending_htlc_forwards();
337 Event::SpendableOutputs { outputs } => {
338 // SpendableOutputDescriptors, of which outputs is a vec of, are critical to keep track
339 // of! While a `StaticOutput` descriptor is just an output to a static, well-known key,
340 // other descriptors are not currently ever regenerated for you by LDK. Once we return
341 // from this method, the descriptor will be gone, and you may lose track of some funds.
343 // Here we simply persist them to disk, with a background task running which will try
344 // to spend them regularly (possibly duplicatively/RBF'ing them). These can just be
345 // treated as normal funds where possible - they are only spendable by us and there is
346 // no rush to claim them.
347 for output in outputs {
348 let key = hex_utils::hex_str(&keys_manager.get_secure_random_bytes());
349 // Note that if the type here changes our read code needs to change as well.
350 let output: SpendableOutputDescriptor = output;
352 .persist(&format!("{}/{}", PENDING_SPENDABLE_OUTPUT_DIR, key), &output)
356 Event::ChannelPending { channel_id, counterparty_node_id, .. } => {
358 "\nEVENT: Channel {} with peer {} is pending awaiting funding lock-in!",
359 hex_utils::hex_str(&channel_id),
360 hex_utils::hex_str(&counterparty_node_id.serialize()),
363 io::stdout().flush().unwrap();
365 Event::ChannelReady {
368 ref counterparty_node_id,
372 "\nEVENT: Channel {} with peer {} is ready to be used!",
373 hex_utils::hex_str(channel_id),
374 hex_utils::hex_str(&counterparty_node_id.serialize()),
377 io::stdout().flush().unwrap();
379 Event::ChannelClosed { channel_id, reason, user_channel_id: _ } => {
381 "\nEVENT: Channel {} closed due to: {:?}",
382 hex_utils::hex_str(&channel_id),
386 io::stdout().flush().unwrap();
388 Event::DiscardFunding { .. } => {
389 // A "real" node should probably "lock" the UTXOs spent in funding transactions until
390 // the funding transaction either confirms, or this event is generated.
392 Event::HTLCIntercepted { .. } => {}
396 async fn start_ldk() {
397 let args = match args::parse_startup_args() {
398 Ok(user_args) => user_args,
402 // Initialize the LDK data directory if necessary.
403 let ldk_data_dir = format!("{}/.ldk", args.ldk_storage_dir_path);
404 fs::create_dir_all(ldk_data_dir.clone()).unwrap();
407 // Step 1: Initialize the Logger
408 let logger = Arc::new(FilesystemLogger::new(ldk_data_dir.clone()));
410 // Initialize our bitcoind client.
411 let bitcoind_client = match BitcoindClient::new(
412 args.bitcoind_rpc_host.clone(),
413 args.bitcoind_rpc_port,
414 args.bitcoind_rpc_username.clone(),
415 args.bitcoind_rpc_password.clone(),
416 tokio::runtime::Handle::current(),
421 Ok(client) => Arc::new(client),
423 println!("Failed to connect to bitcoind client: {}", e);
428 // Check that the bitcoind we've connected to is running the network we expect
429 let bitcoind_chain = bitcoind_client.get_blockchain_info().await.chain;
431 != match args.network {
432 bitcoin::Network::Bitcoin => "main",
433 bitcoin::Network::Testnet => "test",
434 bitcoin::Network::Regtest => "regtest",
435 bitcoin::Network::Signet => "signet",
438 "Chain argument ({}) didn't match bitcoind chain ({})",
439 args.network, bitcoind_chain
444 // Step 2: Initialize the FeeEstimator
446 // BitcoindClient implements the FeeEstimator trait, so it'll act as our fee estimator.
447 let fee_estimator = bitcoind_client.clone();
449 // Step 3: Initialize the BroadcasterInterface
451 // BitcoindClient implements the BroadcasterInterface trait, so it'll act as our transaction
453 let broadcaster = bitcoind_client.clone();
455 // Step 4: Initialize Persist
456 let persister = Arc::new(FilesystemPersister::new(ldk_data_dir.clone()));
458 // Step 5: Initialize the ChainMonitor
459 let chain_monitor: Arc<ChainMonitor> = Arc::new(chainmonitor::ChainMonitor::new(
463 fee_estimator.clone(),
467 // Step 6: Initialize the KeysManager
469 // The key seed that we use to derive the node privkey (that corresponds to the node pubkey) and
470 // other secret key material.
471 let keys_seed_path = format!("{}/keys_seed", ldk_data_dir.clone());
472 let keys_seed = if let Ok(seed) = fs::read(keys_seed_path.clone()) {
473 assert_eq!(seed.len(), 32);
474 let mut key = [0; 32];
475 key.copy_from_slice(&seed);
478 let mut key = [0; 32];
479 thread_rng().fill_bytes(&mut key);
480 match File::create(keys_seed_path.clone()) {
482 f.write_all(&key).expect("Failed to write node keys seed to disk");
483 f.sync_all().expect("Failed to sync node keys seed to disk");
486 println!("ERROR: Unable to create keys seed file {}: {}", keys_seed_path, e);
492 let cur = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap();
493 let keys_manager = Arc::new(KeysManager::new(&keys_seed, cur.as_secs(), cur.subsec_nanos()));
495 // Step 7: Read ChannelMonitor state from disk
496 let mut channelmonitors =
497 persister.read_channelmonitors(keys_manager.clone(), keys_manager.clone()).unwrap();
499 // Step 8: Poll for the best chain tip, which may be used by the channel manager & spv client
500 let polled_chain_tip = init::validate_best_block_header(bitcoind_client.as_ref())
502 .expect("Failed to fetch best block header and best block");
504 // Step 9: Initialize routing ProbabilisticScorer
505 let network_graph_path = format!("{}/network_graph", ldk_data_dir.clone());
507 Arc::new(disk::read_network(Path::new(&network_graph_path), args.network, logger.clone()));
509 let scorer_path = format!("{}/scorer", ldk_data_dir.clone());
510 let scorer = Arc::new(Mutex::new(disk::read_scorer(
511 Path::new(&scorer_path),
512 Arc::clone(&network_graph),
516 // Step 10: Create Router
517 let router = Arc::new(DefaultRouter::new(
518 network_graph.clone(),
520 keys_manager.get_secure_random_bytes(),
524 // Step 11: Initialize the ChannelManager
525 let mut user_config = UserConfig::default();
526 user_config.channel_handshake_limits.force_announced_channel_preference = false;
527 let mut restarting_node = true;
528 let (channel_manager_blockhash, channel_manager) = {
529 if let Ok(mut f) = fs::File::open(format!("{}/manager", ldk_data_dir.clone())) {
530 let mut channel_monitor_mut_references = Vec::new();
531 for (_, channel_monitor) in channelmonitors.iter_mut() {
532 channel_monitor_mut_references.push(channel_monitor);
534 let read_args = ChannelManagerReadArgs::new(
535 keys_manager.clone(),
536 keys_manager.clone(),
537 keys_manager.clone(),
538 fee_estimator.clone(),
539 chain_monitor.clone(),
544 channel_monitor_mut_references,
546 <(BlockHash, ChannelManager)>::read(&mut f, read_args).unwrap()
548 // We're starting a fresh node.
549 restarting_node = false;
551 let polled_best_block = polled_chain_tip.to_best_block();
552 let polled_best_block_hash = polled_best_block.block_hash();
554 ChainParameters { network: args.network, best_block: polled_best_block };
555 let fresh_channel_manager = channelmanager::ChannelManager::new(
556 fee_estimator.clone(),
557 chain_monitor.clone(),
561 keys_manager.clone(),
562 keys_manager.clone(),
563 keys_manager.clone(),
567 (polled_best_block_hash, fresh_channel_manager)
571 // Step 12: Sync ChannelMonitors and ChannelManager to chain tip
572 let mut chain_listener_channel_monitors = Vec::new();
573 let mut cache = UnboundedCache::new();
574 let chain_tip = if restarting_node {
575 let mut chain_listeners = vec![(
576 channel_manager_blockhash,
577 &channel_manager as &(dyn chain::Listen + Send + Sync),
580 for (blockhash, channel_monitor) in channelmonitors.drain(..) {
581 let outpoint = channel_monitor.get_funding_txo().0;
582 chain_listener_channel_monitors.push((
584 (channel_monitor, broadcaster.clone(), fee_estimator.clone(), logger.clone()),
589 for monitor_listener_info in chain_listener_channel_monitors.iter_mut() {
590 chain_listeners.push((
591 monitor_listener_info.0,
592 &monitor_listener_info.1 as &(dyn chain::Listen + Send + Sync),
596 init::synchronize_listeners(
597 bitcoind_client.as_ref(),
608 // Step 13: Give ChannelMonitors to ChainMonitor
609 for item in chain_listener_channel_monitors.drain(..) {
610 let channel_monitor = item.1 .0;
611 let funding_outpoint = item.2;
613 chain_monitor.watch_channel(funding_outpoint, channel_monitor),
614 ChannelMonitorUpdateStatus::Completed
618 // Step 14: Optional: Initialize the P2PGossipSync
619 let gossip_sync = Arc::new(P2PGossipSync::new(
620 Arc::clone(&network_graph),
621 None::<Arc<BitcoindClient>>,
625 // Step 15: Initialize the PeerManager
626 let channel_manager: Arc<ChannelManager> = Arc::new(channel_manager);
627 let onion_messenger: Arc<OnionMessenger> = Arc::new(OnionMessenger::new(
628 Arc::clone(&keys_manager),
629 Arc::clone(&keys_manager),
631 IgnoringMessageHandler {},
633 let mut ephemeral_bytes = [0; 32];
634 let current_time = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs();
635 rand::thread_rng().fill_bytes(&mut ephemeral_bytes);
636 let lightning_msg_handler = MessageHandler {
637 chan_handler: channel_manager.clone(),
638 route_handler: gossip_sync.clone(),
639 onion_message_handler: onion_messenger.clone(),
641 let peer_manager: Arc<PeerManager> = Arc::new(PeerManager::new(
642 lightning_msg_handler,
643 current_time.try_into().unwrap(),
646 IgnoringMessageHandler {},
647 Arc::clone(&keys_manager),
651 // Step 16: Initialize networking
653 let peer_manager_connection_handler = peer_manager.clone();
654 let listening_port = args.ldk_peer_listening_port;
655 let stop_listen_connect = Arc::new(AtomicBool::new(false));
656 let stop_listen = Arc::clone(&stop_listen_connect);
657 tokio::spawn(async move {
658 let listener = tokio::net::TcpListener::bind(format!("[::]:{}", listening_port))
660 .expect("Failed to bind to listen port - is something else already listening on it?");
662 let peer_mgr = peer_manager_connection_handler.clone();
663 let tcp_stream = listener.accept().await.unwrap().0;
664 if stop_listen.load(Ordering::Acquire) {
667 tokio::spawn(async move {
668 lightning_net_tokio::setup_inbound(
670 tcp_stream.into_std().unwrap(),
677 // Step 17: Connect and Disconnect Blocks
678 let channel_manager_listener = channel_manager.clone();
679 let chain_monitor_listener = chain_monitor.clone();
680 let bitcoind_block_source = bitcoind_client.clone();
681 let network = args.network;
682 tokio::spawn(async move {
683 let chain_poller = poll::ChainPoller::new(bitcoind_block_source.as_ref(), network);
684 let chain_listener = (chain_monitor_listener, channel_manager_listener);
685 let mut spv_client = SpvClient::new(chain_tip, chain_poller, &mut cache, &chain_listener);
687 spv_client.poll_best_tip().await.unwrap();
688 tokio::time::sleep(Duration::from_secs(1)).await;
692 // TODO: persist payment info to disk
693 let inbound_payments: PaymentInfoStorage = Arc::new(Mutex::new(HashMap::new()));
694 let outbound_payments: PaymentInfoStorage = Arc::new(Mutex::new(HashMap::new()));
696 // Step 18: Handle LDK Events
697 let channel_manager_event_listener = Arc::clone(&channel_manager);
698 let bitcoind_client_event_listener = Arc::clone(&bitcoind_client);
699 let network_graph_event_listener = Arc::clone(&network_graph);
700 let keys_manager_event_listener = Arc::clone(&keys_manager);
701 let inbound_payments_event_listener = Arc::clone(&inbound_payments);
702 let outbound_payments_event_listener = Arc::clone(&outbound_payments);
703 let persister_event_listener = Arc::clone(&persister);
704 let network = args.network;
705 let event_handler = move |event: Event| {
706 let channel_manager_event_listener = Arc::clone(&channel_manager_event_listener);
707 let bitcoind_client_event_listener = Arc::clone(&bitcoind_client_event_listener);
708 let network_graph_event_listener = Arc::clone(&network_graph_event_listener);
709 let keys_manager_event_listener = Arc::clone(&keys_manager_event_listener);
710 let inbound_payments_event_listener = Arc::clone(&inbound_payments_event_listener);
711 let outbound_payments_event_listener = Arc::clone(&outbound_payments_event_listener);
712 let persister_event_listener = Arc::clone(&persister_event_listener);
715 &channel_manager_event_listener,
716 &bitcoind_client_event_listener,
717 &network_graph_event_listener,
718 &keys_manager_event_listener,
719 &inbound_payments_event_listener,
720 &outbound_payments_event_listener,
721 &persister_event_listener,
729 // Step 19: Persist ChannelManager and NetworkGraph
730 let persister = Arc::new(FilesystemPersister::new(ldk_data_dir.clone()));
732 // Step 20: Background Processing
733 let (bp_exit, bp_exit_check) = tokio::sync::watch::channel(());
734 let background_processor = tokio::spawn(process_events_async(
735 Arc::clone(&persister),
737 chain_monitor.clone(),
738 channel_manager.clone(),
739 GossipSync::p2p(gossip_sync.clone()),
740 peer_manager.clone(),
742 Some(scorer.clone()),
744 let mut bp_exit_fut_check = bp_exit_check.clone();
745 Box::pin(async move {
747 _ = tokio::time::sleep(t) => false,
748 _ = bp_exit_fut_check.changed() => true,
755 // Regularly reconnect to channel peers.
756 let connect_cm = Arc::clone(&channel_manager);
757 let connect_pm = Arc::clone(&peer_manager);
758 let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
759 let stop_connect = Arc::clone(&stop_listen_connect);
760 tokio::spawn(async move {
761 let mut interval = tokio::time::interval(Duration::from_secs(1));
763 interval.tick().await;
764 match disk::read_channel_peer_data(Path::new(&peer_data_path)) {
766 let peers = connect_pm.get_peer_node_ids();
767 for node_id in connect_cm
770 .map(|chan| chan.counterparty.node_id)
771 .filter(|id| !peers.iter().any(|(pk, _)| id == pk))
773 if stop_connect.load(Ordering::Acquire) {
776 for (pubkey, peer_addr) in info.iter() {
777 if *pubkey == node_id {
778 let _ = cli::do_connect_peer(
781 Arc::clone(&connect_pm),
788 Err(e) => println!("ERROR: errored reading channel peer info from disk: {:?}", e),
793 // Regularly broadcast our node_announcement. This is only required (or possible) if we have
794 // some public channels.
795 let peer_man = Arc::clone(&peer_manager);
796 let chan_man = Arc::clone(&channel_manager);
797 let network = args.network;
798 tokio::spawn(async move {
799 // First wait a minute until we have some peers and maybe have opened a channel.
800 tokio::time::sleep(Duration::from_secs(60)).await;
801 // Then, update our announcement once an hour to keep it fresh but avoid unnecessary churn
802 // in the global gossip network.
803 let mut interval = tokio::time::interval(Duration::from_secs(3600));
805 interval.tick().await;
806 // Don't bother trying to announce if we don't have any public channls, though our
807 // peers should drop such an announcement anyway. Note that announcement may not
808 // propagate until we have a channel with 6+ confirmations.
809 if chan_man.list_channels().iter().any(|chan| chan.is_public) {
810 peer_man.broadcast_node_announcement(
812 args.ldk_announced_node_name,
813 args.ldk_announced_listen_addr.clone(),
819 tokio::spawn(sweep::periodic_sweep(
820 ldk_data_dir.clone(),
821 Arc::clone(&keys_manager),
823 Arc::clone(&persister),
824 Arc::clone(&bitcoind_client),
828 cli::poll_for_user_input(
829 Arc::clone(&peer_manager),
830 Arc::clone(&channel_manager),
831 Arc::clone(&keys_manager),
832 Arc::clone(&network_graph),
833 Arc::clone(&onion_messenger),
842 // Disconnect our peers and stop accepting new connections. This ensures we don't continue
843 // updating our channel data after we've stopped the background processor.
844 stop_listen_connect.store(true, Ordering::Release);
845 peer_manager.disconnect_all_peers();
847 // Stop the background processor.
848 bp_exit.send(()).unwrap();
849 background_processor.await.unwrap().unwrap();
853 pub async fn main() {
854 #[cfg(not(target_os = "windows"))]
856 // Catch Ctrl-C with a dummy signal handler.
858 let mut new_action: libc::sigaction = core::mem::zeroed();
859 let mut old_action: libc::sigaction = core::mem::zeroed();
861 extern "C" fn dummy_handler(
862 _: libc::c_int, _: *const libc::siginfo_t, _: *const libc::c_void,
866 new_action.sa_sigaction = dummy_handler as libc::sighandler_t;
867 new_action.sa_flags = libc::SA_SIGINFO;
871 &new_action as *const libc::sigaction,
872 &mut old_action as *mut libc::sigaction,