_ Git - ldk-sample/blob - src/main.rs

   1 pub mod bitcoind_client;
   2 mod cli;
   3 mod convert;
   4 mod disk;
   5 mod hex_utils;
   6
   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::hashes::sha256::Hash as Sha256;
  13 use bitcoin::hashes::Hash;
  14 use bitcoin::network::constants::Network;
  15 use bitcoin::secp256k1::Secp256k1;
  16 use bitcoin::BlockHash;
  17 use bitcoin_bech32::WitnessProgram;
  18 use lightning::chain;
  19 use lightning::chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator};
  20 use lightning::chain::chainmonitor;
  21 use lightning::chain::keysinterface::{InMemorySigner, KeysInterface, KeysManager};
  22 use lightning::chain::Filter;
  23 use lightning::chain::Watch;
  24 use lightning::ln::channelmanager;
  25 use lightning::ln::channelmanager::{
  26         BestBlock, ChainParameters, ChannelManagerReadArgs, SimpleArcChannelManager,
  27 };
  28 use lightning::ln::peer_handler::{MessageHandler, SimpleArcPeerManager};
  29 use lightning::ln::{PaymentHash, PaymentPreimage, PaymentSecret};
  30 use lightning::routing::network_graph::NetGraphMsgHandler;
  31 use lightning::util::config::UserConfig;
  32 use lightning::util::events::{Event, EventsProvider};
  33 use lightning::util::ser::ReadableArgs;
  34 use lightning_background_processor::BackgroundProcessor;
  35 use lightning_block_sync::init;
  36 use lightning_block_sync::poll;
  37 use lightning_block_sync::SpvClient;
  38 use lightning_block_sync::UnboundedCache;
  39 use lightning_net_tokio::SocketDescriptor;
  40 use lightning_persister::FilesystemPersister;
  41 use rand::{thread_rng, Rng};
  42 use std::collections::hash_map::Entry;
  43 use std::collections::HashMap;
  44 use std::fmt;
  45 use std::fs;
  46 use std::fs::File;
  47 use std::io;
  48 use std::io::Write;
  49 use std::ops::Deref;
  50 use std::path::Path;
  51 use std::sync::{Arc, Mutex};
  52 use std::time::{Duration, SystemTime};
  53 use tokio::sync::mpsc;
  54 use tokio::sync::mpsc::Receiver;
  55
  56 pub(crate) enum HTLCStatus {
  57         Pending,
  58         Succeeded,
  59         Failed,
  60 }
  61
  62 pub(crate) struct MillisatAmount(Option<u64>);
  63
  64 impl fmt::Display for MillisatAmount {
  65         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  66                 match self.0 {
  67                         Some(amt) => write!(f, "{}", amt),
  68                         None => write!(f, "unknown"),
  69                 }
  70         }
  71 }
  72
  73 pub(crate) struct PaymentInfo {
  74         preimage: Option<PaymentPreimage>,
  75         secret: Option<PaymentSecret>,
  76         status: HTLCStatus,
  77         amt_msat: MillisatAmount,
  78 }
  79
  80 pub(crate) type PaymentInfoStorage = Arc<Mutex<HashMap<PaymentHash, PaymentInfo>>>;
  81
  82 type ChainMonitor = chainmonitor::ChainMonitor<
  83         InMemorySigner,
  84         Arc<dyn Filter + Send + Sync>,
  85         Arc<BitcoindClient>,
  86         Arc<BitcoindClient>,
  87         Arc<FilesystemLogger>,
  88         Arc<FilesystemPersister>,
  89 >;
  90
  91 pub(crate) type PeerManager = SimpleArcPeerManager<
  92         SocketDescriptor,
  93         ChainMonitor,
  94         BitcoindClient,
  95         BitcoindClient,
  96         dyn chain::Access + Send + Sync,
  97         FilesystemLogger,
  98 >;
  99
 100 pub(crate) type ChannelManager =
 101         SimpleArcChannelManager<ChainMonitor, BitcoindClient, BitcoindClient, FilesystemLogger>;
 102
 103 async fn handle_ldk_events(
 104         channel_manager: Arc<ChannelManager>, chain_monitor: Arc<ChainMonitor>,
 105         bitcoind_client: Arc<BitcoindClient>, keys_manager: Arc<KeysManager>,
 106         inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage, network: Network,
 107         mut event_receiver: Receiver<()>,
 108 ) {
 109         loop {
 110                 let received = event_receiver.recv();
 111                 if received.await.is_none() {
 112                         println!("LDK Event channel closed!");
 113                         return;
 114                 }
 115                 let loop_channel_manager = channel_manager.clone();
 116                 let mut events = channel_manager.get_and_clear_pending_events();
 117                 events.append(&mut chain_monitor.get_and_clear_pending_events());
 118                 for event in events {
 119                         match event {
 120                                 Event::FundingGenerationReady {
 121                                         temporary_channel_id,
 122                                         channel_value_satoshis,
 123                                         output_script,
 124                                         ..
 125                                 } => {
 126                                         // Construct the raw transaction with one output, that is paid the amount of the
 127                                         // channel.
 128                                         let addr = WitnessProgram::from_scriptpubkey(
 129                                                 &output_script[..],
 130                                                 match network {
 131                                                         Network::Bitcoin => bitcoin_bech32::constants::Network::Bitcoin,
 132                                                         Network::Testnet => bitcoin_bech32::constants::Network::Testnet,
 133                                                         Network::Regtest => bitcoin_bech32::constants::Network::Regtest,
 134                                                         Network::Signet => panic!("Signet unsupported"),
 135                                                 },
 136                                         )
 137                                         .expect("Lightning funding tx should always be to a SegWit output")
 138                                         .to_address();
 139                                         let mut outputs = vec![HashMap::with_capacity(1)];
 140                                         outputs[0].insert(addr, channel_value_satoshis as f64 / 100_000_000.0);
 141                                         let raw_tx = bitcoind_client.create_raw_transaction(outputs).await;
 142
 143                                         // Have your wallet put the inputs into the transaction such that the output is
 144                                         // satisfied.
 145                                         let funded_tx = bitcoind_client.fund_raw_transaction(raw_tx).await;
 146                                         let change_output_position = funded_tx.changepos;
 147                                         assert!(change_output_position == 0 || change_output_position == 1);
 148
 149                                         // Sign the final funding transaction and broadcast it.
 150                                         let signed_tx =
 151                                                 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.
 156                                         loop_channel_manager
 157                                                 .funding_transaction_generated(&temporary_channel_id, final_tx)
 158                                                 .unwrap();
 159                                 }
 160                                 Event::PaymentReceived {
 161                                         payment_hash,
 162                                         payment_preimage,
 163                                         payment_secret,
 164                                         amt,
 165                                         ..
 166                                 } => {
 167                                         let mut payments = inbound_payments.lock().unwrap();
 168                                         let status = match loop_channel_manager.claim_funds(payment_preimage.unwrap()) {
 169                                                 true => {
 170                                                         println!(
 171                                                                 "\nEVENT: received payment from payment hash {} of {} millisatoshis",
 172                                                                 hex_utils::hex_str(&payment_hash.0),
 173                                                                 amt
 174                                                         );
 175                                                         print!("> ");
 176                                                         io::stdout().flush().unwrap();
 177                                                         HTLCStatus::Succeeded
 178                                                 }
 179                                                 _ => HTLCStatus::Failed,
 180                                         };
 181                                         match payments.entry(payment_hash) {
 182                                                 Entry::Occupied(mut e) => {
 183                                                         let payment = e.get_mut();
 184                                                         payment.status = status;
 185                                                         payment.preimage = Some(payment_preimage.unwrap());
 186                                                         payment.secret = Some(payment_secret);
 187                                                 }
 188                                                 Entry::Vacant(e) => {
 189                                                         e.insert(PaymentInfo {
 190                                                                 preimage: Some(payment_preimage.unwrap()),
 191                                                                 secret: Some(payment_secret),
 192                                                                 status,
 193                                                                 amt_msat: MillisatAmount(Some(amt)),
 194                                                         });
 195                                                 }
 196                                         }
 197                                 }
 198                                 Event::PaymentSent { payment_preimage } => {
 199                                         let hashed = PaymentHash(Sha256::hash(&payment_preimage.0).into_inner());
 200                                         let mut payments = outbound_payments.lock().unwrap();
 201                                         for (payment_hash, payment) in payments.iter_mut() {
 202                                                 if *payment_hash == hashed {
 203                                                         payment.preimage = Some(payment_preimage);
 204                                                         payment.status = HTLCStatus::Succeeded;
 205                                                         println!(
 206                                                                 "\nEVENT: successfully sent payment of {} millisatoshis from \
 207                                          payment hash {:?} with preimage {:?}",
 208                                                                 payment.amt_msat,
 209                                                                 hex_utils::hex_str(&payment_hash.0),
 210                                                                 hex_utils::hex_str(&payment_preimage.0)
 211                                                         );
 212                                                         print!("> ");
 213                                                         io::stdout().flush().unwrap();
 214                                                 }
 215                                         }
 216                                 }
 217                                 Event::PaymentFailed { payment_hash, rejected_by_dest } => {
 218                                         print!(
 219                                                 "\nEVENT: Failed to send payment to payment hash {:?}: ",
 220                                                 hex_utils::hex_str(&payment_hash.0)
 221                                         );
 222                                         if rejected_by_dest {
 223                                                 println!("rejected by destination node");
 224                                         } else {
 225                                                 println!("route failed");
 226                                         }
 227                                         print!("> ");
 228                                         io::stdout().flush().unwrap();
 229
 230                                         let mut payments = outbound_payments.lock().unwrap();
 231                                         if payments.contains_key(&payment_hash) {
 232                                                 let payment = payments.get_mut(&payment_hash).unwrap();
 233                                                 payment.status = HTLCStatus::Failed;
 234                                         }
 235                                 }
 236                                 Event::PendingHTLCsForwardable { time_forwardable } => {
 237                                         let forwarding_channel_manager = loop_channel_manager.clone();
 238                                         tokio::spawn(async move {
 239                                                 let min = time_forwardable.as_millis() as u64;
 240                                                 let millis_to_sleep = thread_rng().gen_range(min, min * 5) as u64;
 241                                                 tokio::time::sleep(Duration::from_millis(millis_to_sleep)).await;
 242                                                 forwarding_channel_manager.process_pending_htlc_forwards();
 243                                         });
 244                                 }
 245                                 Event::SpendableOutputs { outputs } => {
 246                                         let destination_address = bitcoind_client.get_new_address().await;
 247                                         let output_descriptors = &outputs.iter().map(|a| a).collect::<Vec<_>>();
 248                                         let tx_feerate =
 249                                                 bitcoind_client.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
 250                                         let spending_tx = keys_manager
 251                                                 .spend_spendable_outputs(
 252                                                         output_descriptors,
 253                                                         Vec::new(),
 254                                                         destination_address.script_pubkey(),
 255                                                         tx_feerate,
 256                                                         &Secp256k1::new(),
 257                                                 )
 258                                                 .unwrap();
 259                                         bitcoind_client.broadcast_transaction(&spending_tx);
 260                                 }
 261                         }
 262                 }
 263                 tokio::time::sleep(Duration::from_secs(1)).await;
 264         }
 265 }
 266
 267 async fn start_ldk() {
 268         let args = match cli::parse_startup_args() {
 269                 Ok(user_args) => user_args,
 270                 Err(()) => return,
 271         };
 272
 273         // Initialize the LDK data directory if necessary.
 274         let ldk_data_dir = format!("{}/.ldk", args.ldk_storage_dir_path);
 275         fs::create_dir_all(ldk_data_dir.clone()).unwrap();
 276
 277         // Initialize our bitcoind client.
 278         let bitcoind_client = match BitcoindClient::new(
 279                 args.bitcoind_rpc_host.clone(),
 280                 args.bitcoind_rpc_port,
 281                 args.bitcoind_rpc_username.clone(),
 282                 args.bitcoind_rpc_password.clone(),
 283         )
 284         .await
 285         {
 286                 Ok(client) => Arc::new(client),
 287                 Err(e) => {
 288                         println!("Failed to connect to bitcoind client: {}", e);
 289                         return;
 290                 }
 291         };
 292
 293         // Check that the bitcoind we've connected to is running the network we expect
 294         let bitcoind_chain = bitcoind_client.get_blockchain_info().await.chain;
 295         if bitcoind_chain
 296                 != match args.network {
 297                         bitcoin::Network::Bitcoin => "main",
 298                         bitcoin::Network::Testnet => "test",
 299                         bitcoin::Network::Regtest => "regtest",
 300                         bitcoin::Network::Signet => "signet",
 301                 } {
 302                 println!(
 303                         "Chain argument ({}) didn't match bitcoind chain ({})",
 304                         args.network, bitcoind_chain
 305                 );
 306                 return;
 307         }
 308
 309         // ## Setup
 310         // Step 1: Initialize the FeeEstimator
 311
 312         // BitcoindClient implements the FeeEstimator trait, so it'll act as our fee estimator.
 313         let fee_estimator = bitcoind_client.clone();
 314
 315         // Step 2: Initialize the Logger
 316         let logger = Arc::new(FilesystemLogger::new(ldk_data_dir.clone()));
 317
 318         // Step 3: Initialize the BroadcasterInterface
 319
 320         // BitcoindClient implements the BroadcasterInterface trait, so it'll act as our transaction
 321         // broadcaster.
 322         let broadcaster = bitcoind_client.clone();
 323
 324         // Step 4: Initialize Persist
 325         let persister = Arc::new(FilesystemPersister::new(ldk_data_dir.clone()));
 326
 327         // Step 5: Initialize the ChainMonitor
 328         let chain_monitor: Arc<ChainMonitor> = Arc::new(chainmonitor::ChainMonitor::new(
 329                 None,
 330                 broadcaster.clone(),
 331                 logger.clone(),
 332                 fee_estimator.clone(),
 333                 persister.clone(),
 334         ));
 335
 336         // Step 6: Initialize the KeysManager
 337
 338         // The key seed that we use to derive the node privkey (that corresponds to the node pubkey) and
 339         // other secret key material.
 340         let keys_seed_path = format!("{}/keys_seed", ldk_data_dir.clone());
 341         let keys_seed = if let Ok(seed) = fs::read(keys_seed_path.clone()) {
 342                 assert_eq!(seed.len(), 32);
 343                 let mut key = [0; 32];
 344                 key.copy_from_slice(&seed);
 345                 key
 346         } else {
 347                 let mut key = [0; 32];
 348                 thread_rng().fill_bytes(&mut key);
 349                 match File::create(keys_seed_path.clone()) {
 350                         Ok(mut f) => {
 351                                 f.write_all(&key).expect("Failed to write node keys seed to disk");
 352                                 f.sync_all().expect("Failed to sync node keys seed to disk");
 353                         }
 354                         Err(e) => {
 355                                 println!("ERROR: Unable to create keys seed file {}: {}", keys_seed_path, e);
 356                                 return;
 357                         }
 358                 }
 359                 key
 360         };
 361         let cur = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap();
 362         let keys_manager = Arc::new(KeysManager::new(&keys_seed, cur.as_secs(), cur.subsec_nanos()));
 363
 364         // Step 7: Read ChannelMonitor state from disk
 365         let mut channelmonitors = persister.read_channelmonitors(keys_manager.clone()).unwrap();
 366
 367         // Step 8: Initialize the ChannelManager
 368         let user_config = UserConfig::default();
 369         let mut restarting_node = true;
 370         let (channel_manager_blockhash, mut channel_manager) = {
 371                 if let Ok(mut f) = fs::File::open(format!("{}/manager", ldk_data_dir.clone())) {
 372                         let mut channel_monitor_mut_references = Vec::new();
 373                         for (_, channel_monitor) in channelmonitors.iter_mut() {
 374                                 channel_monitor_mut_references.push(channel_monitor);
 375                         }
 376                         let read_args = ChannelManagerReadArgs::new(
 377                                 keys_manager.clone(),
 378                                 fee_estimator.clone(),
 379                                 chain_monitor.clone(),
 380                                 broadcaster.clone(),
 381                                 logger.clone(),
 382                                 user_config,
 383                                 channel_monitor_mut_references,
 384                         );
 385                         <(BlockHash, ChannelManager)>::read(&mut f, read_args).unwrap()
 386                 } else {
 387                         // We're starting a fresh node.
 388                         restarting_node = false;
 389                         let getinfo_resp = bitcoind_client.get_blockchain_info().await;
 390
 391                         let chain_params = ChainParameters {
 392                                 network: args.network,
 393                                 best_block: BestBlock::new(
 394                                         getinfo_resp.latest_blockhash,
 395                                         getinfo_resp.latest_height as u32,
 396                                 ),
 397                         };
 398                         let fresh_channel_manager = channelmanager::ChannelManager::new(
 399                                 fee_estimator.clone(),
 400                                 chain_monitor.clone(),
 401                                 broadcaster.clone(),
 402                                 logger.clone(),
 403                                 keys_manager.clone(),
 404                                 user_config,
 405                                 chain_params,
 406                         );
 407                         (getinfo_resp.latest_blockhash, fresh_channel_manager)
 408                 }
 409         };
 410
 411         // Step 9: Sync ChannelMonitors and ChannelManager to chain tip
 412         let mut chain_listener_channel_monitors = Vec::new();
 413         let mut cache = UnboundedCache::new();
 414         let mut chain_tip: Option<poll::ValidatedBlockHeader> = None;
 415         if restarting_node {
 416                 let mut chain_listeners =
 417                         vec![(channel_manager_blockhash, &mut channel_manager as &mut dyn chain::Listen)];
 418
 419                 for (blockhash, channel_monitor) in channelmonitors.drain(..) {
 420                         let outpoint = channel_monitor.get_funding_txo().0;
 421                         chain_listener_channel_monitors.push((
 422                                 blockhash,
 423                                 (channel_monitor, broadcaster.clone(), fee_estimator.clone(), logger.clone()),
 424                                 outpoint,
 425                         ));
 426                 }
 427
 428                 for monitor_listener_info in chain_listener_channel_monitors.iter_mut() {
 429                         chain_listeners.push((
 430                                 monitor_listener_info.0,
 431                                 &mut monitor_listener_info.1 as &mut dyn chain::Listen,
 432                         ));
 433                 }
 434                 chain_tip = Some(
 435                         init::synchronize_listeners(
 436                                 &mut bitcoind_client.deref(),
 437                                 args.network,
 438                                 &mut cache,
 439                                 chain_listeners,
 440                         )
 441                         .await
 442                         .unwrap(),
 443                 );
 444         }
 445
 446         // Step 10: Give ChannelMonitors to ChainMonitor
 447         for item in chain_listener_channel_monitors.drain(..) {
 448                 let channel_monitor = item.1 .0;
 449                 let funding_outpoint = item.2;
 450                 chain_monitor.watch_channel(funding_outpoint, channel_monitor).unwrap();
 451         }
 452
 453         // Step 11: Optional: Initialize the NetGraphMsgHandler
 454         // XXX persist routing data
 455         let genesis = genesis_block(args.network).header.block_hash();
 456         let router = Arc::new(NetGraphMsgHandler::new(
 457                 genesis,
 458                 None::<Arc<dyn chain::Access + Send + Sync>>,
 459                 logger.clone(),
 460         ));
 461
 462         // Step 12: Initialize the PeerManager
 463         let channel_manager: Arc<ChannelManager> = Arc::new(channel_manager);
 464         let mut ephemeral_bytes = [0; 32];
 465         rand::thread_rng().fill_bytes(&mut ephemeral_bytes);
 466         let lightning_msg_handler =
 467                 MessageHandler { chan_handler: channel_manager.clone(), route_handler: router.clone() };
 468         let peer_manager: Arc<PeerManager> = Arc::new(PeerManager::new(
 469                 lightning_msg_handler,
 470                 keys_manager.get_node_secret(),
 471                 &ephemeral_bytes,
 472                 logger.clone(),
 473         ));
 474
 475         // ## Running LDK
 476         // Step 13: Initialize networking
 477
 478         // We poll for events in handle_ldk_events(..) rather than waiting for them over the
 479         // mpsc::channel, so we can leave the event receiver as unused.
 480         let (event_ntfn_sender, event_ntfn_receiver) = mpsc::channel(2);
 481         let peer_manager_connection_handler = peer_manager.clone();
 482         let event_notifier = event_ntfn_sender.clone();
 483         let listening_port = args.ldk_peer_listening_port;
 484         tokio::spawn(async move {
 485                 let listener = std::net::TcpListener::bind(format!("0.0.0.0:{}", listening_port)).unwrap();
 486                 loop {
 487                         let peer_mgr = peer_manager_connection_handler.clone();
 488                         let notifier = event_notifier.clone();
 489                         let tcp_stream = listener.accept().unwrap().0;
 490                         tokio::spawn(async move {
 491                                 lightning_net_tokio::setup_inbound(peer_mgr.clone(), notifier.clone(), tcp_stream)
 492                                         .await;
 493                         });
 494                 }
 495         });
 496
 497         // Step 14: Connect and Disconnect Blocks
 498         if chain_tip.is_none() {
 499                 chain_tip =
 500                         Some(init::validate_best_block_header(&mut bitcoind_client.deref()).await.unwrap());
 501         }
 502         let channel_manager_listener = channel_manager.clone();
 503         let chain_monitor_listener = chain_monitor.clone();
 504         let bitcoind_block_source = bitcoind_client.clone();
 505         let network = args.network;
 506         tokio::spawn(async move {
 507                 let mut derefed = bitcoind_block_source.deref();
 508                 let chain_poller = poll::ChainPoller::new(&mut derefed, network);
 509                 let chain_listener = (chain_monitor_listener, channel_manager_listener);
 510                 let mut spv_client =
 511                         SpvClient::new(chain_tip.unwrap(), chain_poller, &mut cache, &chain_listener);
 512                 loop {
 513                         spv_client.poll_best_tip().await.unwrap();
 514                         tokio::time::sleep(Duration::from_secs(1)).await;
 515                 }
 516         });
 517
 518         // Step 15: Initialize LDK Event Handling
 519         let channel_manager_event_listener = channel_manager.clone();
 520         let chain_monitor_event_listener = chain_monitor.clone();
 521         let keys_manager_listener = keys_manager.clone();
 522         // TODO: persist payment info to disk
 523         let inbound_payments: PaymentInfoStorage = Arc::new(Mutex::new(HashMap::new()));
 524         let outbound_payments: PaymentInfoStorage = Arc::new(Mutex::new(HashMap::new()));
 525         let inbound_pmts_for_events = inbound_payments.clone();
 526         let outbound_pmts_for_events = outbound_payments.clone();
 527         let network = args.network;
 528         let bitcoind_rpc = bitcoind_client.clone();
 529         tokio::spawn(async move {
 530                 handle_ldk_events(
 531                         channel_manager_event_listener,
 532                         chain_monitor_event_listener,
 533                         bitcoind_rpc,
 534                         keys_manager_listener,
 535                         inbound_pmts_for_events,
 536                         outbound_pmts_for_events,
 537                         network,
 538                         event_ntfn_receiver,
 539                 )
 540                 .await;
 541         });
 542
 543         // Step 16 & 17: Persist ChannelManager & Background Processing
 544         let data_dir = ldk_data_dir.clone();
 545         let persist_channel_manager_callback =
 546                 move |node: &ChannelManager| FilesystemPersister::persist_manager(data_dir.clone(), &*node);
 547         BackgroundProcessor::start(
 548                 persist_channel_manager_callback,
 549                 channel_manager.clone(),
 550                 peer_manager.clone(),
 551                 logger.clone(),
 552         );
 553
 554         // Reconnect to channel peers if possible.
 555         let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
 556         match disk::read_channel_peer_data(Path::new(&peer_data_path)) {
 557                 Ok(mut info) => {
 558                         for (pubkey, peer_addr) in info.drain() {
 559                                 for chan_info in channel_manager.list_channels() {
 560                                         if pubkey == chan_info.remote_network_id {
 561                                                 let _ = cli::connect_peer_if_necessary(
 562                                                         pubkey,
 563                                                         peer_addr,
 564                                                         peer_manager.clone(),
 565                                                         event_ntfn_sender.clone(),
 566                                                 );
 567                                         }
 568                                 }
 569                         }
 570                 }
 571                 Err(e) => println!("ERROR: errored reading channel peer info from disk: {:?}", e),
 572         }
 573
 574         // Start the CLI.
 575         cli::poll_for_user_input(
 576                 peer_manager.clone(),
 577                 channel_manager.clone(),
 578                 keys_manager.clone(),
 579                 router.clone(),
 580                 inbound_payments,
 581                 outbound_payments,
 582                 event_ntfn_sender,
 583                 ldk_data_dir.clone(),
 584                 logger.clone(),
 585                 args.network,
 586         )
 587         .await;
 588 }
 589
 590 #[tokio::main]
 591 pub async fn main() {
 592         start_ldk().await;
 593 }