_ 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::{BestBlock, Filter, Watch};
  23 use lightning::ln::channelmanager;
  24 use lightning::ln::channelmanager::{
  25         ChainParameters, ChannelManagerReadArgs, SimpleArcChannelManager,
  26 };
  27 use lightning::ln::peer_handler::{MessageHandler, SimpleArcPeerManager};
  28 use lightning::ln::{PaymentHash, PaymentPreimage, PaymentSecret};
  29 use lightning::routing::network_graph::NetGraphMsgHandler;
  30 use lightning::util::config::UserConfig;
  31 use lightning::util::events::Event;
  32 use lightning::util::ser::ReadableArgs;
  33 use lightning_background_processor::BackgroundProcessor;
  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_net_tokio::SocketDescriptor;
  39 use lightning_persister::FilesystemPersister;
  40 use rand::{thread_rng, Rng};
  41 use std::collections::hash_map::Entry;
  42 use std::collections::HashMap;
  43 use std::fmt;
  44 use std::fs;
  45 use std::fs::File;
  46 use std::io;
  47 use std::io::Write;
  48 use std::ops::Deref;
  49 use std::path::Path;
  50 use std::sync::{Arc, Mutex};
  51 use std::time::{Duration, SystemTime};
  52
  53 pub(crate) enum HTLCStatus {
  54         Pending,
  55         Succeeded,
  56         Failed,
  57 }
  58
  59 pub(crate) struct MillisatAmount(Option<u64>);
  60
  61 impl fmt::Display for MillisatAmount {
  62         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  63                 match self.0 {
  64                         Some(amt) => write!(f, "{}", amt),
  65                         None => write!(f, "unknown"),
  66                 }
  67         }
  68 }
  69
  70 pub(crate) struct PaymentInfo {
  71         preimage: Option<PaymentPreimage>,
  72         secret: Option<PaymentSecret>,
  73         status: HTLCStatus,
  74         amt_msat: MillisatAmount,
  75 }
  76
  77 pub(crate) type PaymentInfoStorage = Arc<Mutex<HashMap<PaymentHash, PaymentInfo>>>;
  78
  79 type ChainMonitor = chainmonitor::ChainMonitor<
  80         InMemorySigner,
  81         Arc<dyn Filter + Send + Sync>,
  82         Arc<BitcoindClient>,
  83         Arc<BitcoindClient>,
  84         Arc<FilesystemLogger>,
  85         Arc<FilesystemPersister>,
  86 >;
  87
  88 pub(crate) type PeerManager = SimpleArcPeerManager<
  89         SocketDescriptor,
  90         ChainMonitor,
  91         BitcoindClient,
  92         BitcoindClient,
  93         dyn chain::Access + Send + Sync,
  94         FilesystemLogger,
  95 >;
  96
  97 pub(crate) type ChannelManager =
  98         SimpleArcChannelManager<ChainMonitor, BitcoindClient, BitcoindClient, FilesystemLogger>;
  99
 100 async fn handle_ldk_events(
 101         channel_manager: Arc<ChannelManager>, bitcoind_client: Arc<BitcoindClient>,
 102         keys_manager: Arc<KeysManager>, inbound_payments: PaymentInfoStorage,
 103         outbound_payments: PaymentInfoStorage, network: Network, event: Event,
 104 ) {
 105         match event {
 106                 Event::FundingGenerationReady {
 107                         temporary_channel_id,
 108                         channel_value_satoshis,
 109                         output_script,
 110                         ..
 111                 } => {
 112                         // Construct the raw transaction with one output, that is paid the amount of the
 113                         // channel.
 114                         let addr = WitnessProgram::from_scriptpubkey(
 115                                 &output_script[..],
 116                                 match network {
 117                                         Network::Bitcoin => bitcoin_bech32::constants::Network::Bitcoin,
 118                                         Network::Testnet => bitcoin_bech32::constants::Network::Testnet,
 119                                         Network::Regtest => bitcoin_bech32::constants::Network::Regtest,
 120                                         Network::Signet => panic!("Signet unsupported"),
 121                                 },
 122                         )
 123                         .expect("Lightning funding tx should always be to a SegWit output")
 124                         .to_address();
 125                         let mut outputs = vec![HashMap::with_capacity(1)];
 126                         outputs[0].insert(addr, channel_value_satoshis as f64 / 100_000_000.0);
 127                         let raw_tx = bitcoind_client.create_raw_transaction(outputs).await;
 128
 129                         // Have your wallet put the inputs into the transaction such that the output is
 130                         // satisfied.
 131                         let funded_tx = bitcoind_client.fund_raw_transaction(raw_tx).await;
 132                         let change_output_position = funded_tx.changepos;
 133                         assert!(change_output_position == 0 || change_output_position == 1);
 134
 135                         // Sign the final funding transaction and broadcast it.
 136                         let signed_tx = bitcoind_client.sign_raw_transaction_with_wallet(funded_tx.hex).await;
 137                         assert_eq!(signed_tx.complete, true);
 138                         let final_tx: Transaction =
 139                                 encode::deserialize(&hex_utils::to_vec(&signed_tx.hex).unwrap()).unwrap();
 140                         // Give the funding transaction back to LDK for opening the channel.
 141                         if channel_manager
 142                                 .funding_transaction_generated(&temporary_channel_id, final_tx)
 143                                 .is_err()
 144                         {
 145                                 println!(
 146                                         "\nERROR: Channel went away before we could fund it. The peer disconnected or refused the channel.");
 147                                 print!("> ");
 148                                 io::stdout().flush().unwrap();
 149                         }
 150                 }
 151                 Event::PaymentReceived { payment_hash, payment_preimage, payment_secret, amt, .. } => {
 152                         let mut payments = inbound_payments.lock().unwrap();
 153                         let status = match channel_manager.claim_funds(payment_preimage.unwrap()) {
 154                                 true => {
 155                                         println!(
 156                                                 "\nEVENT: received payment from payment hash {} of {} millisatoshis",
 157                                                 hex_utils::hex_str(&payment_hash.0),
 158                                                 amt
 159                                         );
 160                                         print!("> ");
 161                                         io::stdout().flush().unwrap();
 162                                         HTLCStatus::Succeeded
 163                                 }
 164                                 _ => HTLCStatus::Failed,
 165                         };
 166                         match payments.entry(payment_hash) {
 167                                 Entry::Occupied(mut e) => {
 168                                         let payment = e.get_mut();
 169                                         payment.status = status;
 170                                         payment.preimage = Some(payment_preimage.unwrap());
 171                                         payment.secret = Some(payment_secret);
 172                                 }
 173                                 Entry::Vacant(e) => {
 174                                         e.insert(PaymentInfo {
 175                                                 preimage: Some(payment_preimage.unwrap()),
 176                                                 secret: Some(payment_secret),
 177                                                 status,
 178                                                 amt_msat: MillisatAmount(Some(amt)),
 179                                         });
 180                                 }
 181                         }
 182                 }
 183                 Event::PaymentSent { payment_preimage } => {
 184                         let hashed = PaymentHash(Sha256::hash(&payment_preimage.0).into_inner());
 185                         let mut payments = outbound_payments.lock().unwrap();
 186                         for (payment_hash, payment) in payments.iter_mut() {
 187                                 if *payment_hash == hashed {
 188                                         payment.preimage = Some(payment_preimage);
 189                                         payment.status = HTLCStatus::Succeeded;
 190                                         println!(
 191                                                 "\nEVENT: successfully sent payment of {} millisatoshis from \
 192                                                                  payment hash {:?} with preimage {:?}",
 193                                                 payment.amt_msat,
 194                                                 hex_utils::hex_str(&payment_hash.0),
 195                                                 hex_utils::hex_str(&payment_preimage.0)
 196                                         );
 197                                         print!("> ");
 198                                         io::stdout().flush().unwrap();
 199                                 }
 200                         }
 201                 }
 202                 Event::PaymentFailed { payment_hash, rejected_by_dest } => {
 203                         print!(
 204                                 "\nEVENT: Failed to send payment to payment hash {:?}: ",
 205                                 hex_utils::hex_str(&payment_hash.0)
 206                         );
 207                         if rejected_by_dest {
 208                                 println!("re-attempting the payment will not succeed");
 209                         } else {
 210                                 println!("payment may be retried");
 211                         }
 212                         print!("> ");
 213                         io::stdout().flush().unwrap();
 214
 215                         let mut payments = outbound_payments.lock().unwrap();
 216                         if payments.contains_key(&payment_hash) {
 217                                 let payment = payments.get_mut(&payment_hash).unwrap();
 218                                 payment.status = HTLCStatus::Failed;
 219                         }
 220                 }
 221                 Event::PendingHTLCsForwardable { time_forwardable } => {
 222                         let forwarding_channel_manager = channel_manager.clone();
 223                         tokio::spawn(async move {
 224                                 let min = time_forwardable.as_millis() as u64;
 225                                 let millis_to_sleep = thread_rng().gen_range(min, min * 5) as u64;
 226                                 tokio::time::sleep(Duration::from_millis(millis_to_sleep)).await;
 227                                 forwarding_channel_manager.process_pending_htlc_forwards();
 228                         });
 229                 }
 230                 Event::SpendableOutputs { outputs } => {
 231                         let destination_address = bitcoind_client.get_new_address().await;
 232                         let output_descriptors = &outputs.iter().map(|a| a).collect::<Vec<_>>();
 233                         let tx_feerate =
 234                                 bitcoind_client.get_est_sat_per_1000_weight(ConfirmationTarget::Normal);
 235                         let spending_tx = keys_manager
 236                                 .spend_spendable_outputs(
 237                                         output_descriptors,
 238                                         Vec::new(),
 239                                         destination_address.script_pubkey(),
 240                                         tx_feerate,
 241                                         &Secp256k1::new(),
 242                                 )
 243                                 .unwrap();
 244                         bitcoind_client.broadcast_transaction(&spending_tx);
 245                 }
 246         }
 247 }
 248
 249 async fn start_ldk() {
 250         let args = match cli::parse_startup_args() {
 251                 Ok(user_args) => user_args,
 252                 Err(()) => return,
 253         };
 254
 255         // Initialize the LDK data directory if necessary.
 256         let ldk_data_dir = format!("{}/.ldk", args.ldk_storage_dir_path);
 257         fs::create_dir_all(ldk_data_dir.clone()).unwrap();
 258
 259         // Initialize our bitcoind client.
 260         let bitcoind_client = match BitcoindClient::new(
 261                 args.bitcoind_rpc_host.clone(),
 262                 args.bitcoind_rpc_port,
 263                 args.bitcoind_rpc_username.clone(),
 264                 args.bitcoind_rpc_password.clone(),
 265         )
 266         .await
 267         {
 268                 Ok(client) => Arc::new(client),
 269                 Err(e) => {
 270                         println!("Failed to connect to bitcoind client: {}", e);
 271                         return;
 272                 }
 273         };
 274
 275         // Check that the bitcoind we've connected to is running the network we expect
 276         let bitcoind_chain = bitcoind_client.get_blockchain_info().await.chain;
 277         if bitcoind_chain
 278                 != match args.network {
 279                         bitcoin::Network::Bitcoin => "main",
 280                         bitcoin::Network::Testnet => "test",
 281                         bitcoin::Network::Regtest => "regtest",
 282                         bitcoin::Network::Signet => "signet",
 283                 } {
 284                 println!(
 285                         "Chain argument ({}) didn't match bitcoind chain ({})",
 286                         args.network, bitcoind_chain
 287                 );
 288                 return;
 289         }
 290
 291         // ## Setup
 292         // Step 1: Initialize the FeeEstimator
 293
 294         // BitcoindClient implements the FeeEstimator trait, so it'll act as our fee estimator.
 295         let fee_estimator = bitcoind_client.clone();
 296
 297         // Step 2: Initialize the Logger
 298         let logger = Arc::new(FilesystemLogger::new(ldk_data_dir.clone()));
 299
 300         // Step 3: Initialize the BroadcasterInterface
 301
 302         // BitcoindClient implements the BroadcasterInterface trait, so it'll act as our transaction
 303         // broadcaster.
 304         let broadcaster = bitcoind_client.clone();
 305
 306         // Step 4: Initialize Persist
 307         let persister = Arc::new(FilesystemPersister::new(ldk_data_dir.clone()));
 308
 309         // Step 5: Initialize the ChainMonitor
 310         let chain_monitor: Arc<ChainMonitor> = Arc::new(chainmonitor::ChainMonitor::new(
 311                 None,
 312                 broadcaster.clone(),
 313                 logger.clone(),
 314                 fee_estimator.clone(),
 315                 persister.clone(),
 316         ));
 317
 318         // Step 6: Initialize the KeysManager
 319
 320         // The key seed that we use to derive the node privkey (that corresponds to the node pubkey) and
 321         // other secret key material.
 322         let keys_seed_path = format!("{}/keys_seed", ldk_data_dir.clone());
 323         let keys_seed = if let Ok(seed) = fs::read(keys_seed_path.clone()) {
 324                 assert_eq!(seed.len(), 32);
 325                 let mut key = [0; 32];
 326                 key.copy_from_slice(&seed);
 327                 key
 328         } else {
 329                 let mut key = [0; 32];
 330                 thread_rng().fill_bytes(&mut key);
 331                 match File::create(keys_seed_path.clone()) {
 332                         Ok(mut f) => {
 333                                 f.write_all(&key).expect("Failed to write node keys seed to disk");
 334                                 f.sync_all().expect("Failed to sync node keys seed to disk");
 335                         }
 336                         Err(e) => {
 337                                 println!("ERROR: Unable to create keys seed file {}: {}", keys_seed_path, e);
 338                                 return;
 339                         }
 340                 }
 341                 key
 342         };
 343         let cur = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap();
 344         let keys_manager = Arc::new(KeysManager::new(&keys_seed, cur.as_secs(), cur.subsec_nanos()));
 345
 346         // Step 7: Read ChannelMonitor state from disk
 347         let mut channelmonitors = persister.read_channelmonitors(keys_manager.clone()).unwrap();
 348
 349         // Step 8: Initialize the ChannelManager
 350         let mut user_config = UserConfig::default();
 351         user_config.peer_channel_config_limits.force_announced_channel_preference = false;
 352         let mut restarting_node = true;
 353         let (channel_manager_blockhash, mut channel_manager) = {
 354                 if let Ok(mut f) = fs::File::open(format!("{}/manager", ldk_data_dir.clone())) {
 355                         let mut channel_monitor_mut_references = Vec::new();
 356                         for (_, channel_monitor) in channelmonitors.iter_mut() {
 357                                 channel_monitor_mut_references.push(channel_monitor);
 358                         }
 359                         let read_args = ChannelManagerReadArgs::new(
 360                                 keys_manager.clone(),
 361                                 fee_estimator.clone(),
 362                                 chain_monitor.clone(),
 363                                 broadcaster.clone(),
 364                                 logger.clone(),
 365                                 user_config,
 366                                 channel_monitor_mut_references,
 367                         );
 368                         <(BlockHash, ChannelManager)>::read(&mut f, read_args).unwrap()
 369                 } else {
 370                         // We're starting a fresh node.
 371                         restarting_node = false;
 372                         let getinfo_resp = bitcoind_client.get_blockchain_info().await;
 373
 374                         let chain_params = ChainParameters {
 375                                 network: args.network,
 376                                 best_block: BestBlock::new(
 377                                         getinfo_resp.latest_blockhash,
 378                                         getinfo_resp.latest_height as u32,
 379                                 ),
 380                         };
 381                         let fresh_channel_manager = channelmanager::ChannelManager::new(
 382                                 fee_estimator.clone(),
 383                                 chain_monitor.clone(),
 384                                 broadcaster.clone(),
 385                                 logger.clone(),
 386                                 keys_manager.clone(),
 387                                 user_config,
 388                                 chain_params,
 389                         );
 390                         (getinfo_resp.latest_blockhash, fresh_channel_manager)
 391                 }
 392         };
 393
 394         // Step 9: Sync ChannelMonitors and ChannelManager to chain tip
 395         let mut chain_listener_channel_monitors = Vec::new();
 396         let mut cache = UnboundedCache::new();
 397         let mut chain_tip: Option<poll::ValidatedBlockHeader> = None;
 398         if restarting_node {
 399                 let mut chain_listeners =
 400                         vec![(channel_manager_blockhash, &mut channel_manager as &mut dyn chain::Listen)];
 401
 402                 for (blockhash, channel_monitor) in channelmonitors.drain(..) {
 403                         let outpoint = channel_monitor.get_funding_txo().0;
 404                         chain_listener_channel_monitors.push((
 405                                 blockhash,
 406                                 (channel_monitor, broadcaster.clone(), fee_estimator.clone(), logger.clone()),
 407                                 outpoint,
 408                         ));
 409                 }
 410
 411                 for monitor_listener_info in chain_listener_channel_monitors.iter_mut() {
 412                         chain_listeners.push((
 413                                 monitor_listener_info.0,
 414                                 &mut monitor_listener_info.1 as &mut dyn chain::Listen,
 415                         ));
 416                 }
 417                 chain_tip = Some(
 418                         init::synchronize_listeners(
 419                                 &mut bitcoind_client.deref(),
 420                                 args.network,
 421                                 &mut cache,
 422                                 chain_listeners,
 423                         )
 424                         .await
 425                         .unwrap(),
 426                 );
 427         }
 428
 429         // Step 10: Give ChannelMonitors to ChainMonitor
 430         for item in chain_listener_channel_monitors.drain(..) {
 431                 let channel_monitor = item.1 .0;
 432                 let funding_outpoint = item.2;
 433                 chain_monitor.watch_channel(funding_outpoint, channel_monitor).unwrap();
 434         }
 435
 436         // Step 11: Optional: Initialize the NetGraphMsgHandler
 437         let genesis = genesis_block(args.network).header.block_hash();
 438         let network_graph_path = format!("{}/network_graph", ldk_data_dir.clone());
 439         let network_graph = disk::read_network(Path::new(&network_graph_path), genesis);
 440         let router = Arc::new(NetGraphMsgHandler::from_net_graph(
 441                 None::<Arc<dyn chain::Access + Send + Sync>>,
 442                 logger.clone(),
 443                 network_graph,
 444         ));
 445         let router_persist = Arc::clone(&router);
 446         tokio::spawn(async move {
 447                 let mut interval = tokio::time::interval(Duration::from_secs(600));
 448                 loop {
 449                         interval.tick().await;
 450                         if disk::persist_network(
 451                                 Path::new(&network_graph_path),
 452                                 &*router_persist.network_graph.read().unwrap(),
 453                         )
 454                         .is_err()
 455                         {
 456                                 // Persistence errors here are non-fatal as we can just fetch the routing graph
 457                                 // again later, but they may indicate a disk error which could be fatal elsewhere.
 458                                 eprintln!(
 459                                         "Warning: Failed to persist network graph, check your disk and permissions"
 460                                 );
 461                         }
 462                 }
 463         });
 464
 465         // Step 12: Initialize the PeerManager
 466         let channel_manager: Arc<ChannelManager> = Arc::new(channel_manager);
 467         let mut ephemeral_bytes = [0; 32];
 468         rand::thread_rng().fill_bytes(&mut ephemeral_bytes);
 469         let lightning_msg_handler =
 470                 MessageHandler { chan_handler: channel_manager.clone(), route_handler: router.clone() };
 471         let peer_manager: Arc<PeerManager> = Arc::new(PeerManager::new(
 472                 lightning_msg_handler,
 473                 keys_manager.get_node_secret(),
 474                 &ephemeral_bytes,
 475                 logger.clone(),
 476         ));
 477
 478         // ## Running LDK
 479         // Step 13: Initialize networking
 480
 481         let peer_manager_connection_handler = peer_manager.clone();
 482         let listening_port = args.ldk_peer_listening_port;
 483         tokio::spawn(async move {
 484                 let listener = tokio::net::TcpListener::bind(format!("0.0.0.0:{}", listening_port))
 485                         .await
 486                         .expect("Failed to bind to listen port - is something else already listening on it?");
 487                 loop {
 488                         let peer_mgr = peer_manager_connection_handler.clone();
 489                         let tcp_stream = listener.accept().await.unwrap().0;
 490                         tokio::spawn(async move {
 491                                 lightning_net_tokio::setup_inbound(
 492                                         peer_mgr.clone(),
 493                                         tcp_stream.into_std().unwrap(),
 494                                 )
 495                                 .await;
 496                         });
 497                 }
 498         });
 499
 500         // Step 14: Connect and Disconnect Blocks
 501         if chain_tip.is_none() {
 502                 chain_tip =
 503                         Some(init::validate_best_block_header(&mut bitcoind_client.deref()).await.unwrap());
 504         }
 505         let channel_manager_listener = channel_manager.clone();
 506         let chain_monitor_listener = chain_monitor.clone();
 507         let bitcoind_block_source = bitcoind_client.clone();
 508         let network = args.network;
 509         tokio::spawn(async move {
 510                 let mut derefed = bitcoind_block_source.deref();
 511                 let chain_poller = poll::ChainPoller::new(&mut derefed, network);
 512                 let chain_listener = (chain_monitor_listener, channel_manager_listener);
 513                 let mut spv_client =
 514                         SpvClient::new(chain_tip.unwrap(), chain_poller, &mut cache, &chain_listener);
 515                 loop {
 516                         spv_client.poll_best_tip().await.unwrap();
 517                         tokio::time::sleep(Duration::from_secs(1)).await;
 518                 }
 519         });
 520
 521         // Step 15: Handle LDK Events
 522         let channel_manager_event_listener = channel_manager.clone();
 523         let keys_manager_listener = keys_manager.clone();
 524         // TODO: persist payment info to disk
 525         let inbound_payments: PaymentInfoStorage = Arc::new(Mutex::new(HashMap::new()));
 526         let outbound_payments: PaymentInfoStorage = Arc::new(Mutex::new(HashMap::new()));
 527         let inbound_pmts_for_events = inbound_payments.clone();
 528         let outbound_pmts_for_events = outbound_payments.clone();
 529         let network = args.network;
 530         let bitcoind_rpc = bitcoind_client.clone();
 531         let handle = tokio::runtime::Handle::current();
 532         let event_handler = move |event| {
 533                 handle.block_on(handle_ldk_events(
 534                         channel_manager_event_listener.clone(),
 535                         bitcoind_rpc.clone(),
 536                         keys_manager_listener.clone(),
 537                         inbound_pmts_for_events.clone(),
 538                         outbound_pmts_for_events.clone(),
 539                         network,
 540                         event,
 541                 ))
 542         };
 543         // Step 16: Persist ChannelManager
 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         // Step 17: Background Processing
 548         BackgroundProcessor::start(
 549                 persist_channel_manager_callback,
 550                 event_handler,
 551                 chain_monitor.clone(),
 552                 channel_manager.clone(),
 553                 peer_manager.clone(),
 554                 logger.clone(),
 555         );
 556
 557         // Reconnect to channel peers if possible.
 558         let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
 559         match disk::read_channel_peer_data(Path::new(&peer_data_path)) {
 560                 Ok(mut info) => {
 561                         for (pubkey, peer_addr) in info.drain() {
 562                                 for chan_info in channel_manager.list_channels() {
 563                                         if pubkey == chan_info.counterparty.node_id {
 564                                                 let _ =
 565                                                         cli::connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 566                                                                 .await;
 567                                         }
 568                                 }
 569                         }
 570                 }
 571                 Err(e) => println!("ERROR: errored reading channel peer info from disk: {:?}", e),
 572         }
 573
 574         // Regularly broadcast our node_announcement. This is only required (or possible) if we have
 575         // some public channels, and is only useful if we have public listen address(es) to announce.
 576         // In a production environment, this should occur only after the announcement of new channels
 577         // to avoid churn in the global network graph.
 578         let chan_manager = Arc::clone(&channel_manager);
 579         let network = args.network;
 580         if !args.ldk_announced_listen_addr.is_empty() {
 581                 tokio::spawn(async move {
 582                         let mut interval = tokio::time::interval(Duration::from_secs(60));
 583                         loop {
 584                                 interval.tick().await;
 585                                 chan_manager.broadcast_node_announcement(
 586                                         [0; 3],
 587                                         args.ldk_announced_node_name,
 588                                         args.ldk_announced_listen_addr.clone(),
 589                                 );
 590                         }
 591                 });
 592         }
 593
 594         // Start the CLI.
 595         cli::poll_for_user_input(
 596                 peer_manager.clone(),
 597                 channel_manager.clone(),
 598                 keys_manager.clone(),
 599                 router.clone(),
 600                 inbound_payments,
 601                 outbound_payments,
 602                 ldk_data_dir.clone(),
 603                 logger.clone(),
 604                 network,
 605         )
 606         .await;
 607 }
 608
 609 #[tokio::main]
 610 pub async fn main() {
 611         start_ldk().await;
 612 }