1 pub mod bitcoind_client;
7 use crate::bitcoind_client::BitcoindClient;
8 use crate::disk::FilesystemLogger;
9 use bitcoin::blockdata::constants::genesis_block;
10 use bitcoin::blockdata::transaction::Transaction;
11 use bitcoin::consensus::encode;
12 use bitcoin::network::constants::Network;
13 use bitcoin::secp256k1::Secp256k1;
14 use bitcoin::BlockHash;
15 use bitcoin_bech32::WitnessProgram;
17 use lightning::chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator};
18 use lightning::chain::chainmonitor;
19 use lightning::chain::keysinterface::{InMemorySigner, KeysInterface, KeysManager, Recipient};
20 use lightning::chain::{BestBlock, Filter, Watch};
21 use lightning::ln::channelmanager;
22 use lightning::ln::channelmanager::{
23 ChainParameters, ChannelManagerReadArgs, SimpleArcChannelManager,
25 use lightning::ln::peer_handler::{IgnoringMessageHandler, MessageHandler, SimpleArcPeerManager};
26 use lightning::ln::{PaymentHash, PaymentPreimage, PaymentSecret};
27 use lightning::routing::gossip;
28 use lightning::routing::gossip::{NodeId, P2PGossipSync};
29 use lightning::routing::scoring::ProbabilisticScorer;
30 use lightning::util::config::UserConfig;
31 use lightning::util::events::{Event, PaymentPurpose};
32 use lightning::util::ser::ReadableArgs;
33 use lightning_background_processor::{BackgroundProcessor, GossipSync};
34 use lightning_block_sync::init;
35 use lightning_block_sync::poll;
36 use lightning_block_sync::SpvClient;
37 use lightning_block_sync::UnboundedCache;
38 use lightning_invoice::payment;
39 use lightning_invoice::utils::DefaultRouter;
40 use lightning_net_tokio::SocketDescriptor;
41 use lightning_persister::FilesystemPersister;
42 use rand::{thread_rng, Rng};
43 use std::collections::hash_map::Entry;
44 use std::collections::HashMap;
52 use std::sync::atomic::{AtomicBool, Ordering};
53 use std::sync::{Arc, Mutex};
54 use std::time::{Duration, SystemTime};
56 pub(crate) enum HTLCStatus {
62 pub(crate) struct MillisatAmount(Option<u64>);
64 impl fmt::Display for MillisatAmount {
65 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
67 Some(amt) => write!(f, "{}", amt),
68 None => write!(f, "unknown"),
73 pub(crate) struct PaymentInfo {
74 preimage: Option<PaymentPreimage>,
75 secret: Option<PaymentSecret>,
77 amt_msat: MillisatAmount,
80 pub(crate) type PaymentInfoStorage = Arc<Mutex<HashMap<PaymentHash, PaymentInfo>>>;
82 type ChainMonitor = chainmonitor::ChainMonitor<
84 Arc<dyn Filter + Send + Sync>,
87 Arc<FilesystemLogger>,
88 Arc<FilesystemPersister>,
91 pub(crate) type PeerManager = SimpleArcPeerManager<
96 dyn chain::Access + Send + Sync,
100 pub(crate) type ChannelManager =
101 SimpleArcChannelManager<ChainMonitor, BitcoindClient, BitcoindClient, FilesystemLogger>;
103 pub(crate) type InvoicePayer<E> = payment::InvoicePayer<
106 Arc<Mutex<ProbabilisticScorer<Arc<NetworkGraph>, Arc<FilesystemLogger>>>>,
107 Arc<FilesystemLogger>,
111 type Router = DefaultRouter<Arc<NetworkGraph>, Arc<FilesystemLogger>>;
113 pub(crate) type NetworkGraph = gossip::NetworkGraph<Arc<FilesystemLogger>>;
115 async fn handle_ldk_events(
116 channel_manager: &Arc<ChannelManager>, bitcoind_client: &BitcoindClient,
117 network_graph: &NetworkGraph, keys_manager: &KeysManager,
118 inbound_payments: &PaymentInfoStorage, outbound_payments: &PaymentInfoStorage,
119 network: Network, event: &Event,
122 Event::FundingGenerationReady {
123 temporary_channel_id,
124 counterparty_node_id,
125 channel_value_satoshis,
129 // Construct the raw transaction with one output, that is paid the amount of the
131 let addr = WitnessProgram::from_scriptpubkey(
134 Network::Bitcoin => bitcoin_bech32::constants::Network::Bitcoin,
135 Network::Testnet => bitcoin_bech32::constants::Network::Testnet,
136 Network::Regtest => bitcoin_bech32::constants::Network::Regtest,
137 Network::Signet => bitcoin_bech32::constants::Network::Signet,
140 .expect("Lightning funding tx should always be to a SegWit output")
142 let mut outputs = vec![HashMap::with_capacity(1)];
143 outputs[0].insert(addr, *channel_value_satoshis as f64 / 100_000_000.0);
144 let raw_tx = bitcoind_client.create_raw_transaction(outputs).await;
146 // Have your wallet put the inputs into the transaction such that the output is
148 let funded_tx = bitcoind_client.fund_raw_transaction(raw_tx).await;
150 // Sign the final funding transaction and broadcast it.
151 let signed_tx = bitcoind_client.sign_raw_transaction_with_wallet(funded_tx.hex).await;
152 assert_eq!(signed_tx.complete, true);
153 let final_tx: Transaction =
154 encode::deserialize(&hex_utils::to_vec(&signed_tx.hex).unwrap()).unwrap();
155 // Give the funding transaction back to LDK for opening the channel.
157 .funding_transaction_generated(
158 &temporary_channel_id,
159 counterparty_node_id,
165 "\nERROR: Channel went away before we could fund it. The peer disconnected or refused the channel.");
167 io::stdout().flush().unwrap();
170 Event::PaymentReceived { payment_hash, purpose, amount_msat } => {
172 "\nEVENT: received payment from payment hash {} of {} millisatoshis",
173 hex_utils::hex_str(&payment_hash.0),
177 io::stdout().flush().unwrap();
178 let payment_preimage = match purpose {
179 PaymentPurpose::InvoicePayment { payment_preimage, .. } => *payment_preimage,
180 PaymentPurpose::SpontaneousPayment(preimage) => Some(*preimage),
182 channel_manager.claim_funds(payment_preimage.unwrap());
184 Event::PaymentClaimed { payment_hash, purpose, amount_msat } => {
186 "\nEVENT: claimed payment from payment hash {} of {} millisatoshis",
187 hex_utils::hex_str(&payment_hash.0),
191 io::stdout().flush().unwrap();
192 let (payment_preimage, payment_secret) = match purpose {
193 PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
194 (*payment_preimage, Some(*payment_secret))
196 PaymentPurpose::SpontaneousPayment(preimage) => (Some(*preimage), None),
198 let mut payments = inbound_payments.lock().unwrap();
199 match payments.entry(*payment_hash) {
200 Entry::Occupied(mut e) => {
201 let payment = e.get_mut();
202 payment.status = HTLCStatus::Succeeded;
203 payment.preimage = payment_preimage;
204 payment.secret = payment_secret;
206 Entry::Vacant(e) => {
207 e.insert(PaymentInfo {
208 preimage: payment_preimage,
209 secret: payment_secret,
210 status: HTLCStatus::Succeeded,
211 amt_msat: MillisatAmount(Some(*amount_msat)),
216 Event::PaymentSent { payment_preimage, payment_hash, fee_paid_msat, .. } => {
217 let mut payments = outbound_payments.lock().unwrap();
218 for (hash, payment) in payments.iter_mut() {
219 if *hash == *payment_hash {
220 payment.preimage = Some(*payment_preimage);
221 payment.status = HTLCStatus::Succeeded;
223 "\nEVENT: successfully sent payment of {} millisatoshis{} from \
224 payment hash {:?} with preimage {:?}",
226 if let Some(fee) = fee_paid_msat {
227 format!(" (fee {} msat)", fee)
231 hex_utils::hex_str(&payment_hash.0),
232 hex_utils::hex_str(&payment_preimage.0)
235 io::stdout().flush().unwrap();
239 Event::OpenChannelRequest { .. } => {
240 // Unreachable, we don't set manually_accept_inbound_channels
242 Event::PaymentPathSuccessful { .. } => {}
243 Event::PaymentPathFailed { .. } => {}
244 Event::ProbeSuccessful { .. } => {}
245 Event::ProbeFailed { .. } => {}
246 Event::PaymentFailed { payment_hash, .. } => {
248 "\nEVENT: Failed to send payment to payment hash {:?}: exhausted payment retry attempts",
249 hex_utils::hex_str(&payment_hash.0)
252 io::stdout().flush().unwrap();
254 let mut payments = outbound_payments.lock().unwrap();
255 if payments.contains_key(&payment_hash) {
256 let payment = payments.get_mut(&payment_hash).unwrap();
257 payment.status = HTLCStatus::Failed;
260 Event::PaymentForwarded {
264 claim_from_onchain_tx,
266 let read_only_network_graph = network_graph.read_only();
267 let nodes = read_only_network_graph.nodes();
268 let channels = channel_manager.list_channels();
270 let node_str = |channel_id: &Option<[u8; 32]>| match channel_id {
271 None => String::new(),
272 Some(channel_id) => match channels.iter().find(|c| c.channel_id == *channel_id) {
273 None => String::new(),
275 match nodes.get(&NodeId::from_pubkey(&channel.counterparty.node_id)) {
276 None => "private node".to_string(),
277 Some(node) => match &node.announcement_info {
278 None => "unnamed node".to_string(),
279 Some(announcement) => {
280 format!("node {}", announcement.alias)
287 let channel_str = |channel_id: &Option<[u8; 32]>| {
289 .map(|channel_id| format!(" with channel {}", hex_utils::hex_str(&channel_id)))
293 format!(" from {}{}", node_str(prev_channel_id), channel_str(prev_channel_id));
295 format!(" to {}{}", node_str(next_channel_id), channel_str(next_channel_id));
297 let from_onchain_str = if *claim_from_onchain_tx {
298 "from onchain downstream claim"
300 "from HTLC fulfill message"
302 if let Some(fee_earned) = fee_earned_msat {
304 "\nEVENT: Forwarded payment{}{}, earning {} msat {}",
305 from_prev_str, to_next_str, fee_earned, from_onchain_str
309 "\nEVENT: Forwarded payment{}{}, claiming onchain {}",
310 from_prev_str, to_next_str, from_onchain_str
314 io::stdout().flush().unwrap();
316 Event::HTLCHandlingFailed { .. } => {}
317 Event::PendingHTLCsForwardable { time_forwardable } => {
318 let forwarding_channel_manager = channel_manager.clone();
319 let min = time_forwardable.as_millis() as u64;
320 tokio::spawn(async move {
321 let millis_to_sleep = thread_rng().gen_range(min, min * 5) as u64;
322 tokio::time::sleep(Duration::from_millis(millis_to_sleep)).await;
323 forwarding_channel_manager.process_pending_htlc_forwards();
326 Event::SpendableOutputs { outputs } => {
327 let destination_address = bitcoind_client.get_new_address().await;
328 let output_descriptors = &outputs.iter().map(|a| a).collect::<Vec<_>>();
330 bitcoind_client.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
331 let spending_tx = keys_manager
332 .spend_spendable_outputs(
335 destination_address.script_pubkey(),
340 bitcoind_client.broadcast_transaction(&spending_tx);
342 Event::ChannelClosed { channel_id, reason, user_channel_id: _ } => {
344 "\nEVENT: Channel {} closed due to: {:?}",
345 hex_utils::hex_str(channel_id),
349 io::stdout().flush().unwrap();
351 Event::DiscardFunding { .. } => {
352 // A "real" node should probably "lock" the UTXOs spent in funding transactions until
353 // the funding transaction either confirms, or this event is generated.
358 async fn start_ldk() {
359 let args = match cli::parse_startup_args() {
360 Ok(user_args) => user_args,
364 // Initialize the LDK data directory if necessary.
365 let ldk_data_dir = format!("{}/.ldk", args.ldk_storage_dir_path);
366 fs::create_dir_all(ldk_data_dir.clone()).unwrap();
368 // Initialize our bitcoind client.
369 let bitcoind_client = match BitcoindClient::new(
370 args.bitcoind_rpc_host.clone(),
371 args.bitcoind_rpc_port,
372 args.bitcoind_rpc_username.clone(),
373 args.bitcoind_rpc_password.clone(),
374 tokio::runtime::Handle::current(),
378 Ok(client) => Arc::new(client),
380 println!("Failed to connect to bitcoind client: {}", e);
385 // Check that the bitcoind we've connected to is running the network we expect
386 let bitcoind_chain = bitcoind_client.get_blockchain_info().await.chain;
388 != match args.network {
389 bitcoin::Network::Bitcoin => "main",
390 bitcoin::Network::Testnet => "test",
391 bitcoin::Network::Regtest => "regtest",
392 bitcoin::Network::Signet => "signet",
395 "Chain argument ({}) didn't match bitcoind chain ({})",
396 args.network, bitcoind_chain
402 // Step 1: Initialize the FeeEstimator
404 // BitcoindClient implements the FeeEstimator trait, so it'll act as our fee estimator.
405 let fee_estimator = bitcoind_client.clone();
407 // Step 2: Initialize the Logger
408 let logger = Arc::new(FilesystemLogger::new(ldk_data_dir.clone()));
410 // Step 3: Initialize the BroadcasterInterface
412 // BitcoindClient implements the BroadcasterInterface trait, so it'll act as our transaction
414 let broadcaster = bitcoind_client.clone();
416 // Step 4: Initialize Persist
417 let persister = Arc::new(FilesystemPersister::new(ldk_data_dir.clone()));
419 // Step 5: Initialize the ChainMonitor
420 let chain_monitor: Arc<ChainMonitor> = Arc::new(chainmonitor::ChainMonitor::new(
424 fee_estimator.clone(),
428 // Step 6: Initialize the KeysManager
430 // The key seed that we use to derive the node privkey (that corresponds to the node pubkey) and
431 // other secret key material.
432 let keys_seed_path = format!("{}/keys_seed", ldk_data_dir.clone());
433 let keys_seed = if let Ok(seed) = fs::read(keys_seed_path.clone()) {
434 assert_eq!(seed.len(), 32);
435 let mut key = [0; 32];
436 key.copy_from_slice(&seed);
439 let mut key = [0; 32];
440 thread_rng().fill_bytes(&mut key);
441 match File::create(keys_seed_path.clone()) {
443 f.write_all(&key).expect("Failed to write node keys seed to disk");
444 f.sync_all().expect("Failed to sync node keys seed to disk");
447 println!("ERROR: Unable to create keys seed file {}: {}", keys_seed_path, e);
453 let cur = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap();
454 let keys_manager = Arc::new(KeysManager::new(&keys_seed, cur.as_secs(), cur.subsec_nanos()));
456 // Step 7: Read ChannelMonitor state from disk
457 let mut channelmonitors = persister.read_channelmonitors(keys_manager.clone()).unwrap();
459 // Step 8: Initialize the ChannelManager
460 let mut user_config = UserConfig::default();
461 user_config.channel_handshake_limits.force_announced_channel_preference = false;
462 let mut restarting_node = true;
463 let (channel_manager_blockhash, channel_manager) = {
464 if let Ok(mut f) = fs::File::open(format!("{}/manager", ldk_data_dir.clone())) {
465 let mut channel_monitor_mut_references = Vec::new();
466 for (_, channel_monitor) in channelmonitors.iter_mut() {
467 channel_monitor_mut_references.push(channel_monitor);
469 let read_args = ChannelManagerReadArgs::new(
470 keys_manager.clone(),
471 fee_estimator.clone(),
472 chain_monitor.clone(),
476 channel_monitor_mut_references,
478 <(BlockHash, ChannelManager)>::read(&mut f, read_args).unwrap()
480 // We're starting a fresh node.
481 restarting_node = false;
482 let getinfo_resp = bitcoind_client.get_blockchain_info().await;
484 let chain_params = ChainParameters {
485 network: args.network,
486 best_block: BestBlock::new(
487 getinfo_resp.latest_blockhash,
488 getinfo_resp.latest_height as u32,
491 let fresh_channel_manager = channelmanager::ChannelManager::new(
492 fee_estimator.clone(),
493 chain_monitor.clone(),
496 keys_manager.clone(),
500 (getinfo_resp.latest_blockhash, fresh_channel_manager)
504 // Step 9: Sync ChannelMonitors and ChannelManager to chain tip
505 let mut chain_listener_channel_monitors = Vec::new();
506 let mut cache = UnboundedCache::new();
507 let mut chain_tip: Option<poll::ValidatedBlockHeader> = None;
509 let mut chain_listeners =
510 vec![(channel_manager_blockhash, &channel_manager as &dyn chain::Listen)];
512 for (blockhash, channel_monitor) in channelmonitors.drain(..) {
513 let outpoint = channel_monitor.get_funding_txo().0;
514 chain_listener_channel_monitors.push((
516 (channel_monitor, broadcaster.clone(), fee_estimator.clone(), logger.clone()),
521 for monitor_listener_info in chain_listener_channel_monitors.iter_mut() {
523 .push((monitor_listener_info.0, &monitor_listener_info.1 as &dyn chain::Listen));
526 init::synchronize_listeners(
527 &mut bitcoind_client.deref(),
537 // Step 10: Give ChannelMonitors to ChainMonitor
538 for item in chain_listener_channel_monitors.drain(..) {
539 let channel_monitor = item.1 .0;
540 let funding_outpoint = item.2;
541 chain_monitor.watch_channel(funding_outpoint, channel_monitor).unwrap();
544 // Step 11: Optional: Initialize the P2PGossipSync
545 let genesis = genesis_block(args.network).header.block_hash();
546 let network_graph_path = format!("{}/network_graph", ldk_data_dir.clone());
548 Arc::new(disk::read_network(Path::new(&network_graph_path), genesis, logger.clone()));
549 let gossip_sync = Arc::new(P2PGossipSync::new(
550 Arc::clone(&network_graph),
551 None::<Arc<dyn chain::Access + Send + Sync>>,
555 // Step 12: Initialize the PeerManager
556 let channel_manager: Arc<ChannelManager> = Arc::new(channel_manager);
557 let mut ephemeral_bytes = [0; 32];
558 rand::thread_rng().fill_bytes(&mut ephemeral_bytes);
559 let lightning_msg_handler = MessageHandler {
560 chan_handler: channel_manager.clone(),
561 route_handler: gossip_sync.clone(),
563 let peer_manager: Arc<PeerManager> = Arc::new(PeerManager::new(
564 lightning_msg_handler,
565 keys_manager.get_node_secret(Recipient::Node).unwrap(),
568 Arc::new(IgnoringMessageHandler {}),
572 // Step 13: Initialize networking
574 let peer_manager_connection_handler = peer_manager.clone();
575 let listening_port = args.ldk_peer_listening_port;
576 let stop_listen_connect = Arc::new(AtomicBool::new(false));
577 let stop_listen = Arc::clone(&stop_listen_connect);
578 tokio::spawn(async move {
579 let listener = tokio::net::TcpListener::bind(format!("0.0.0.0:{}", listening_port))
581 .expect("Failed to bind to listen port - is something else already listening on it?");
583 let peer_mgr = peer_manager_connection_handler.clone();
584 let tcp_stream = listener.accept().await.unwrap().0;
585 if stop_listen.load(Ordering::Acquire) {
588 tokio::spawn(async move {
589 lightning_net_tokio::setup_inbound(
591 tcp_stream.into_std().unwrap(),
598 // Step 14: Connect and Disconnect Blocks
599 if chain_tip.is_none() {
601 Some(init::validate_best_block_header(&mut bitcoind_client.deref()).await.unwrap());
603 let channel_manager_listener = channel_manager.clone();
604 let chain_monitor_listener = chain_monitor.clone();
605 let bitcoind_block_source = bitcoind_client.clone();
606 let network = args.network;
607 tokio::spawn(async move {
608 let mut derefed = bitcoind_block_source.deref();
609 let chain_poller = poll::ChainPoller::new(&mut derefed, network);
610 let chain_listener = (chain_monitor_listener, channel_manager_listener);
612 SpvClient::new(chain_tip.unwrap(), chain_poller, &mut cache, &chain_listener);
614 spv_client.poll_best_tip().await.unwrap();
615 tokio::time::sleep(Duration::from_secs(1)).await;
619 // Step 15: Handle LDK Events
620 let channel_manager_event_listener = channel_manager.clone();
621 let keys_manager_listener = keys_manager.clone();
622 // TODO: persist payment info to disk
623 let inbound_payments: PaymentInfoStorage = Arc::new(Mutex::new(HashMap::new()));
624 let outbound_payments: PaymentInfoStorage = Arc::new(Mutex::new(HashMap::new()));
625 let inbound_pmts_for_events = inbound_payments.clone();
626 let outbound_pmts_for_events = outbound_payments.clone();
627 let network = args.network;
628 let bitcoind_rpc = bitcoind_client.clone();
629 let network_graph_events = network_graph.clone();
630 let handle = tokio::runtime::Handle::current();
631 let event_handler = move |event: &Event| {
632 handle.block_on(handle_ldk_events(
633 &channel_manager_event_listener,
635 &network_graph_events,
636 &keys_manager_listener,
637 &inbound_pmts_for_events,
638 &outbound_pmts_for_events,
644 // Step 16: Initialize routing ProbabilisticScorer
645 let scorer_path = format!("{}/scorer", ldk_data_dir.clone());
646 let scorer = Arc::new(Mutex::new(disk::read_scorer(
647 Path::new(&scorer_path),
648 Arc::clone(&network_graph),
652 // Step 17: Create InvoicePayer
653 let router = DefaultRouter::new(
654 network_graph.clone(),
656 keys_manager.get_secure_random_bytes(),
658 let invoice_payer = Arc::new(InvoicePayer::new(
659 channel_manager.clone(),
664 payment::Retry::Timeout(Duration::from_secs(10)),
667 // Step 18: Persist ChannelManager and NetworkGraph
668 let persister = Arc::new(FilesystemPersister::new(ldk_data_dir.clone()));
670 // Step 19: Background Processing
671 let background_processor = BackgroundProcessor::start(
673 invoice_payer.clone(),
674 chain_monitor.clone(),
675 channel_manager.clone(),
676 GossipSync::p2p(gossip_sync.clone()),
677 peer_manager.clone(),
679 Some(scorer.clone()),
682 // Regularly reconnect to channel peers.
683 let connect_cm = Arc::clone(&channel_manager);
684 let connect_pm = Arc::clone(&peer_manager);
685 let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
686 let stop_connect = Arc::clone(&stop_listen_connect);
687 tokio::spawn(async move {
688 let mut interval = tokio::time::interval(Duration::from_secs(1));
690 interval.tick().await;
691 match disk::read_channel_peer_data(Path::new(&peer_data_path)) {
693 let peers = connect_pm.get_peer_node_ids();
694 for node_id in connect_cm
697 .map(|chan| chan.counterparty.node_id)
698 .filter(|id| !peers.contains(id))
700 if stop_connect.load(Ordering::Acquire) {
703 for (pubkey, peer_addr) in info.iter() {
704 if *pubkey == node_id {
705 let _ = cli::do_connect_peer(
708 Arc::clone(&connect_pm),
715 Err(e) => println!("ERROR: errored reading channel peer info from disk: {:?}", e),
720 // Regularly broadcast our node_announcement. This is only required (or possible) if we have
721 // some public channels, and is only useful if we have public listen address(es) to announce.
722 // In a production environment, this should occur only after the announcement of new channels
723 // to avoid churn in the global network graph.
724 let chan_manager = Arc::clone(&channel_manager);
725 let network = args.network;
726 if !args.ldk_announced_listen_addr.is_empty() {
727 tokio::spawn(async move {
728 let mut interval = tokio::time::interval(Duration::from_secs(60));
730 interval.tick().await;
731 chan_manager.broadcast_node_announcement(
733 args.ldk_announced_node_name,
734 args.ldk_announced_listen_addr.clone(),
741 cli::poll_for_user_input(
742 Arc::clone(&invoice_payer),
743 Arc::clone(&peer_manager),
744 Arc::clone(&channel_manager),
745 Arc::clone(&keys_manager),
746 Arc::clone(&network_graph),
749 ldk_data_dir.clone(),
754 // Disconnect our peers and stop accepting new connections. This ensures we don't continue
755 // updating our channel data after we've stopped the background processor.
756 stop_listen_connect.store(true, Ordering::Release);
757 peer_manager.disconnect_all_peers();
759 // Stop the background processor.
760 background_processor.stop().unwrap();
764 pub async fn main() {