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

   1 mod args;
   2 pub mod bitcoind_client;
   3 mod cli;
   4 mod convert;
   5 mod disk;
   6 mod hex_utils;
   7 mod sweep;
   8
   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;
  16 use disk::{INBOUND_PAYMENTS_FNAME, OUTBOUND_PAYMENTS_FNAME};
  17 use lightning::chain::{chainmonitor, ChannelMonitorUpdateStatus};
  18 use lightning::chain::{Filter, Watch};
  19 use lightning::events::bump_transaction::{BumpTransactionEventHandler, Wallet};
  20 use lightning::events::{Event, PaymentFailureReason, PaymentPurpose};
  21 use lightning::ln::channelmanager::{self, RecentPaymentDetails};
  22 use lightning::ln::channelmanager::{
  23         ChainParameters, ChannelManagerReadArgs, PaymentId, SimpleArcChannelManager,
  24 };
  25 use lightning::ln::msgs::DecodeError;
  26 use lightning::ln::peer_handler::{IgnoringMessageHandler, MessageHandler, SimpleArcPeerManager};
  27 use lightning::ln::{ChannelId, PaymentHash, PaymentPreimage, PaymentSecret};
  28 use lightning::onion_message::messenger::{DefaultMessageRouter, SimpleArcOnionMessenger};
  29 use lightning::routing::gossip;
  30 use lightning::routing::gossip::{NodeId, P2PGossipSync};
  31 use lightning::routing::router::DefaultRouter;
  32 use lightning::routing::scoring::ProbabilisticScoringFeeParameters;
  33 use lightning::sign::{EntropySource, InMemorySigner, KeysManager, SpendableOutputDescriptor};
  34 use lightning::util::config::UserConfig;
  35 use lightning::util::persist::{self, KVStore, MonitorUpdatingPersister};
  36 use lightning::util::ser::{Readable, ReadableArgs, Writeable, Writer};
  37 use lightning::{chain, impl_writeable_tlv_based, impl_writeable_tlv_based_enum};
  38 use lightning_background_processor::{process_events_async, GossipSync};
  39 use lightning_block_sync::init;
  40 use lightning_block_sync::poll;
  41 use lightning_block_sync::SpvClient;
  42 use lightning_block_sync::UnboundedCache;
  43 use lightning_net_tokio::SocketDescriptor;
  44 use lightning_persister::fs_store::FilesystemStore;
  45 use rand::{thread_rng, Rng};
  46 use std::collections::hash_map::Entry;
  47 use std::collections::HashMap;
  48 use std::convert::TryInto;
  49 use std::fmt;
  50 use std::fs;
  51 use std::fs::File;
  52 use std::io;
  53 use std::io::Write;
  54 use std::net::ToSocketAddrs;
  55 use std::path::Path;
  56 use std::sync::atomic::{AtomicBool, Ordering};
  57 use std::sync::{Arc, Mutex, RwLock};
  58 use std::time::{Duration, SystemTime};
  59
  60 pub(crate) const PENDING_SPENDABLE_OUTPUT_DIR: &'static str = "pending_spendable_outputs";
  61
  62 #[derive(Copy, Clone)]
  63 pub(crate) enum HTLCStatus {
  64         Pending,
  65         Succeeded,
  66         Failed,
  67 }
  68
  69 impl_writeable_tlv_based_enum!(HTLCStatus,
  70         (0, Pending) => {},
  71         (1, Succeeded) => {},
  72         (2, Failed) => {};
  73 );
  74
  75 pub(crate) struct MillisatAmount(Option<u64>);
  76
  77 impl fmt::Display for MillisatAmount {
  78         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  79                 match self.0 {
  80                         Some(amt) => write!(f, "{}", amt),
  81                         None => write!(f, "unknown"),
  82                 }
  83         }
  84 }
  85
  86 impl Readable for MillisatAmount {
  87         fn read<R: io::Read>(r: &mut R) -> Result<Self, DecodeError> {
  88                 let amt: Option<u64> = Readable::read(r)?;
  89                 Ok(MillisatAmount(amt))
  90         }
  91 }
  92
  93 impl Writeable for MillisatAmount {
  94         fn write<W: Writer>(&self, w: &mut W) -> Result<(), std::io::Error> {
  95                 self.0.write(w)
  96         }
  97 }
  98
  99 pub(crate) struct PaymentInfo {
 100         preimage: Option<PaymentPreimage>,
 101         secret: Option<PaymentSecret>,
 102         status: HTLCStatus,
 103         amt_msat: MillisatAmount,
 104 }
 105
 106 impl_writeable_tlv_based!(PaymentInfo, {
 107         (0, preimage, required),
 108         (2, secret, required),
 109         (4, status, required),
 110         (6, amt_msat, required),
 111 });
 112
 113 pub(crate) struct InboundPaymentInfoStorage {
 114         payments: HashMap<PaymentHash, PaymentInfo>,
 115 }
 116
 117 impl_writeable_tlv_based!(InboundPaymentInfoStorage, {
 118         (0, payments, required),
 119 });
 120
 121 pub(crate) struct OutboundPaymentInfoStorage {
 122         payments: HashMap<PaymentId, PaymentInfo>,
 123 }
 124
 125 impl_writeable_tlv_based!(OutboundPaymentInfoStorage, {
 126         (0, payments, required),
 127 });
 128
 129 type ChainMonitor = chainmonitor::ChainMonitor<
 130         InMemorySigner,
 131         Arc<dyn Filter + Send + Sync>,
 132         Arc<BitcoindClient>,
 133         Arc<BitcoindClient>,
 134         Arc<FilesystemLogger>,
 135         Arc<
 136                 MonitorUpdatingPersister<
 137                         Arc<FilesystemStore>,
 138                         Arc<FilesystemLogger>,
 139                         Arc<KeysManager>,
 140                         Arc<KeysManager>,
 141                 >,
 142         >,
 143 >;
 144
 145 pub(crate) type GossipVerifier = lightning_block_sync::gossip::GossipVerifier<
 146         lightning_block_sync::gossip::TokioSpawner,
 147         Arc<lightning_block_sync::rpc::RpcClient>,
 148         Arc<FilesystemLogger>,
 149 >;
 150
 151 pub(crate) type PeerManager = SimpleArcPeerManager<
 152         SocketDescriptor,
 153         ChainMonitor,
 154         BitcoindClient,
 155         BitcoindClient,
 156         GossipVerifier,
 157         FilesystemLogger,
 158 >;
 159
 160 pub(crate) type ChannelManager =
 161         SimpleArcChannelManager<ChainMonitor, BitcoindClient, BitcoindClient, FilesystemLogger>;
 162
 163 pub(crate) type NetworkGraph = gossip::NetworkGraph<Arc<FilesystemLogger>>;
 164
 165 type OnionMessenger =
 166         SimpleArcOnionMessenger<ChainMonitor, BitcoindClient, BitcoindClient, FilesystemLogger>;
 167
 168 pub(crate) type BumpTxEventHandler = BumpTransactionEventHandler<
 169         Arc<BitcoindClient>,
 170         Arc<Wallet<Arc<BitcoindClient>, Arc<FilesystemLogger>>>,
 171         Arc<KeysManager>,
 172         Arc<FilesystemLogger>,
 173 >;
 174
 175 async fn handle_ldk_events(
 176         channel_manager: Arc<ChannelManager>, bitcoind_client: &BitcoindClient,
 177         network_graph: &NetworkGraph, keys_manager: &KeysManager,
 178         bump_tx_event_handler: &BumpTxEventHandler, peer_manager: Arc<PeerManager>,
 179         inbound_payments: Arc<Mutex<InboundPaymentInfoStorage>>,
 180         outbound_payments: Arc<Mutex<OutboundPaymentInfoStorage>>, fs_store: Arc<FilesystemStore>,
 181         network: Network, event: Event,
 182 ) {
 183         match event {
 184                 Event::FundingGenerationReady {
 185                         temporary_channel_id,
 186                         counterparty_node_id,
 187                         channel_value_satoshis,
 188                         output_script,
 189                         ..
 190                 } => {
 191                         // Construct the raw transaction with one output, that is paid the amount of the
 192                         // channel.
 193                         let addr = WitnessProgram::from_scriptpubkey(
 194                                 &output_script.as_bytes(),
 195                                 match network {
 196                                         Network::Bitcoin => bitcoin_bech32::constants::Network::Bitcoin,
 197                                         Network::Regtest => bitcoin_bech32::constants::Network::Regtest,
 198                                         Network::Signet => bitcoin_bech32::constants::Network::Signet,
 199                                         Network::Testnet | _ => bitcoin_bech32::constants::Network::Testnet,
 200                                 },
 201                         )
 202                         .expect("Lightning funding tx should always be to a SegWit output")
 203                         .to_address();
 204                         let mut outputs = vec![HashMap::with_capacity(1)];
 205                         outputs[0].insert(addr, channel_value_satoshis as f64 / 100_000_000.0);
 206                         let raw_tx = bitcoind_client.create_raw_transaction(outputs).await;
 207
 208                         // Have your wallet put the inputs into the transaction such that the output is
 209                         // satisfied.
 210                         let funded_tx = bitcoind_client.fund_raw_transaction(raw_tx).await;
 211
 212                         // Sign the final funding transaction and give it to LDK, who will eventually broadcast it.
 213                         let signed_tx = bitcoind_client.sign_raw_transaction_with_wallet(funded_tx.hex).await;
 214                         assert_eq!(signed_tx.complete, true);
 215                         let final_tx: Transaction =
 216                                 encode::deserialize(&hex_utils::to_vec(&signed_tx.hex).unwrap()).unwrap();
 217                         // Give the funding transaction back to LDK for opening the channel.
 218                         if channel_manager
 219                                 .funding_transaction_generated(
 220                                         &temporary_channel_id,
 221                                         &counterparty_node_id,
 222                                         final_tx,
 223                                 )
 224                                 .is_err()
 225                         {
 226                                 println!(
 227                                         "\nERROR: Channel went away before we could fund it. The peer disconnected or refused the channel.");
 228                                 print!("> ");
 229                                 io::stdout().flush().unwrap();
 230                         }
 231                 },
 232                 Event::PaymentClaimable {
 233                         payment_hash,
 234                         purpose,
 235                         amount_msat,
 236                         receiver_node_id: _,
 237                         via_channel_id: _,
 238                         via_user_channel_id: _,
 239                         claim_deadline: _,
 240                         onion_fields: _,
 241                         counterparty_skimmed_fee_msat: _,
 242                 } => {
 243                         println!(
 244                                 "\nEVENT: received payment from payment hash {} of {} millisatoshis",
 245                                 payment_hash, amount_msat,
 246                         );
 247                         print!("> ");
 248                         io::stdout().flush().unwrap();
 249                         let payment_preimage = match purpose {
 250                                 PaymentPurpose::InvoicePayment { payment_preimage, .. } => payment_preimage,
 251                                 PaymentPurpose::SpontaneousPayment(preimage) => Some(preimage),
 252                         };
 253                         channel_manager.claim_funds(payment_preimage.unwrap());
 254                 },
 255                 Event::PaymentClaimed {
 256                         payment_hash,
 257                         purpose,
 258                         amount_msat,
 259                         receiver_node_id: _,
 260                         htlcs: _,
 261                         sender_intended_total_msat: _,
 262                 } => {
 263                         println!(
 264                                 "\nEVENT: claimed payment from payment hash {} of {} millisatoshis",
 265                                 payment_hash, amount_msat,
 266                         );
 267                         print!("> ");
 268                         io::stdout().flush().unwrap();
 269                         let (payment_preimage, payment_secret) = match purpose {
 270                                 PaymentPurpose::InvoicePayment { payment_preimage, payment_secret, .. } => {
 271                                         (payment_preimage, Some(payment_secret))
 272                                 },
 273                                 PaymentPurpose::SpontaneousPayment(preimage) => (Some(preimage), None),
 274                         };
 275                         let mut inbound = inbound_payments.lock().unwrap();
 276                         match inbound.payments.entry(payment_hash) {
 277                                 Entry::Occupied(mut e) => {
 278                                         let payment = e.get_mut();
 279                                         payment.status = HTLCStatus::Succeeded;
 280                                         payment.preimage = payment_preimage;
 281                                         payment.secret = payment_secret;
 282                                 },
 283                                 Entry::Vacant(e) => {
 284                                         e.insert(PaymentInfo {
 285                                                 preimage: payment_preimage,
 286                                                 secret: payment_secret,
 287                                                 status: HTLCStatus::Succeeded,
 288                                                 amt_msat: MillisatAmount(Some(amount_msat)),
 289                                         });
 290                                 },
 291                         }
 292                         fs_store.write("", "", INBOUND_PAYMENTS_FNAME, &inbound.encode()).unwrap();
 293                 },
 294                 Event::PaymentSent {
 295                         payment_preimage, payment_hash, fee_paid_msat, payment_id, ..
 296                 } => {
 297                         let mut outbound = outbound_payments.lock().unwrap();
 298                         for (id, payment) in outbound.payments.iter_mut() {
 299                                 if *id == payment_id.unwrap() {
 300                                         payment.preimage = Some(payment_preimage);
 301                                         payment.status = HTLCStatus::Succeeded;
 302                                         println!(
 303                                                 "\nEVENT: successfully sent payment of {} millisatoshis{} from \
 304                                                                  payment hash {} with preimage {}",
 305                                                 payment.amt_msat,
 306                                                 if let Some(fee) = fee_paid_msat {
 307                                                         format!(" (fee {} msat)", fee)
 308                                                 } else {
 309                                                         "".to_string()
 310                                                 },
 311                                                 payment_hash,
 312                                                 payment_preimage
 313                                         );
 314                                         print!("> ");
 315                                         io::stdout().flush().unwrap();
 316                                 }
 317                         }
 318                         fs_store.write("", "", OUTBOUND_PAYMENTS_FNAME, &outbound.encode()).unwrap();
 319                 },
 320                 Event::OpenChannelRequest {
 321                         ref temporary_channel_id, ref counterparty_node_id, ..
 322                 } => {
 323                         let mut random_bytes = [0u8; 16];
 324                         random_bytes.copy_from_slice(&keys_manager.get_secure_random_bytes()[..16]);
 325                         let user_channel_id = u128::from_be_bytes(random_bytes);
 326                         let res = channel_manager.accept_inbound_channel(
 327                                 temporary_channel_id,
 328                                 counterparty_node_id,
 329                                 user_channel_id,
 330                         );
 331
 332                         if let Err(e) = res {
 333                                 print!(
 334                                         "\nEVENT: Failed to accept inbound channel ({}) from {}: {:?}",
 335                                         temporary_channel_id,
 336                                         hex_utils::hex_str(&counterparty_node_id.serialize()),
 337                                         e,
 338                                 );
 339                         } else {
 340                                 print!(
 341                                         "\nEVENT: Accepted inbound channel ({}) from {}",
 342                                         temporary_channel_id,
 343                                         hex_utils::hex_str(&counterparty_node_id.serialize()),
 344                                 );
 345                         }
 346                         print!("> ");
 347                         io::stdout().flush().unwrap();
 348                 },
 349                 Event::PaymentPathSuccessful { .. } => {},
 350                 Event::PaymentPathFailed { .. } => {},
 351                 Event::ProbeSuccessful { .. } => {},
 352                 Event::ProbeFailed { .. } => {},
 353                 Event::PaymentFailed { payment_hash, reason, payment_id, .. } => {
 354                         print!(
 355                                 "\nEVENT: Failed to send payment to payment hash {}: {:?}",
 356                                 payment_hash,
 357                                 if let Some(r) = reason { r } else { PaymentFailureReason::RetriesExhausted }
 358                         );
 359                         print!("> ");
 360                         io::stdout().flush().unwrap();
 361
 362                         let mut outbound = outbound_payments.lock().unwrap();
 363                         if outbound.payments.contains_key(&payment_id) {
 364                                 let payment = outbound.payments.get_mut(&payment_id).unwrap();
 365                                 payment.status = HTLCStatus::Failed;
 366                         }
 367                         fs_store.write("", "", OUTBOUND_PAYMENTS_FNAME, &outbound.encode()).unwrap();
 368                 },
 369                 Event::InvoiceRequestFailed { payment_id } => {
 370                         print!("\nEVENT: Failed to request invoice to send payment with id {}", payment_id);
 371                         print!("> ");
 372                         io::stdout().flush().unwrap();
 373
 374                         let mut outbound = outbound_payments.lock().unwrap();
 375                         if outbound.payments.contains_key(&payment_id) {
 376                                 let payment = outbound.payments.get_mut(&payment_id).unwrap();
 377                                 payment.status = HTLCStatus::Failed;
 378                         }
 379                         fs_store.write("", "", OUTBOUND_PAYMENTS_FNAME, &outbound.encode()).unwrap();
 380                 },
 381                 Event::PaymentForwarded {
 382                         prev_channel_id,
 383                         next_channel_id,
 384                         fee_earned_msat,
 385                         claim_from_onchain_tx,
 386                         outbound_amount_forwarded_msat,
 387                 } => {
 388                         let read_only_network_graph = network_graph.read_only();
 389                         let nodes = read_only_network_graph.nodes();
 390                         let channels = channel_manager.list_channels();
 391
 392                         let node_str = |channel_id: &Option<ChannelId>| match channel_id {
 393                                 None => String::new(),
 394                                 Some(channel_id) => match channels.iter().find(|c| c.channel_id == *channel_id) {
 395                                         None => String::new(),
 396                                         Some(channel) => {
 397                                                 match nodes.get(&NodeId::from_pubkey(&channel.counterparty.node_id)) {
 398                                                         None => "private node".to_string(),
 399                                                         Some(node) => match &node.announcement_info {
 400                                                                 None => "unnamed node".to_string(),
 401                                                                 Some(announcement) => {
 402                                                                         format!("node {}", announcement.alias)
 403                                                                 },
 404                                                         },
 405                                                 }
 406                                         },
 407                                 },
 408                         };
 409                         let channel_str = |channel_id: &Option<ChannelId>| {
 410                                 channel_id
 411                                         .map(|channel_id| format!(" with channel {}", channel_id))
 412                                         .unwrap_or_default()
 413                         };
 414                         let from_prev_str =
 415                                 format!(" from {}{}", node_str(&prev_channel_id), channel_str(&prev_channel_id));
 416                         let to_next_str =
 417                                 format!(" to {}{}", node_str(&next_channel_id), channel_str(&next_channel_id));
 418
 419                         let from_onchain_str = if claim_from_onchain_tx {
 420                                 "from onchain downstream claim"
 421                         } else {
 422                                 "from HTLC fulfill message"
 423                         };
 424                         let amt_args = if let Some(v) = outbound_amount_forwarded_msat {
 425                                 format!("{}", v)
 426                         } else {
 427                                 "?".to_string()
 428                         };
 429                         if let Some(fee_earned) = fee_earned_msat {
 430                                 println!(
 431                                         "\nEVENT: Forwarded payment for {} msat{}{}, earning {} msat {}",
 432                                         amt_args, from_prev_str, to_next_str, fee_earned, from_onchain_str
 433                                 );
 434                         } else {
 435                                 println!(
 436                                         "\nEVENT: Forwarded payment for {} msat{}{}, claiming onchain {}",
 437                                         amt_args, from_prev_str, to_next_str, from_onchain_str
 438                                 );
 439                         }
 440                         print!("> ");
 441                         io::stdout().flush().unwrap();
 442                 },
 443                 Event::HTLCHandlingFailed { .. } => {},
 444                 Event::PendingHTLCsForwardable { time_forwardable } => {
 445                         let forwarding_channel_manager = channel_manager.clone();
 446                         let min = time_forwardable.as_millis() as u64;
 447                         tokio::spawn(async move {
 448                                 let millis_to_sleep = thread_rng().gen_range(min, min * 5) as u64;
 449                                 tokio::time::sleep(Duration::from_millis(millis_to_sleep)).await;
 450                                 forwarding_channel_manager.process_pending_htlc_forwards();
 451                         });
 452                 },
 453                 Event::SpendableOutputs { outputs, channel_id: _ } => {
 454                         // SpendableOutputDescriptors, of which outputs is a vec of, are critical to keep track
 455                         // of! While a `StaticOutput` descriptor is just an output to a static, well-known key,
 456                         // other descriptors are not currently ever regenerated for you by LDK. Once we return
 457                         // from this method, the descriptor will be gone, and you may lose track of some funds.
 458                         //
 459                         // Here we simply persist them to disk, with a background task running which will try
 460                         // to spend them regularly (possibly duplicatively/RBF'ing them). These can just be
 461                         // treated as normal funds where possible - they are only spendable by us and there is
 462                         // no rush to claim them.
 463                         for output in outputs {
 464                                 let key = hex_utils::hex_str(&keys_manager.get_secure_random_bytes());
 465                                 // Note that if the type here changes our read code needs to change as well.
 466                                 let output: SpendableOutputDescriptor = output;
 467                                 fs_store.write(PENDING_SPENDABLE_OUTPUT_DIR, "", &key, &output.encode()).unwrap();
 468                         }
 469                 },
 470                 Event::ChannelPending { channel_id, counterparty_node_id, .. } => {
 471                         println!(
 472                                 "\nEVENT: Channel {} with peer {} is pending awaiting funding lock-in!",
 473                                 channel_id,
 474                                 hex_utils::hex_str(&counterparty_node_id.serialize()),
 475                         );
 476                         print!("> ");
 477                         io::stdout().flush().unwrap();
 478                 },
 479                 Event::ChannelReady {
 480                         ref channel_id,
 481                         user_channel_id: _,
 482                         ref counterparty_node_id,
 483                         channel_type: _,
 484                 } => {
 485                         println!(
 486                                 "\nEVENT: Channel {} with peer {} is ready to be used!",
 487                                 channel_id,
 488                                 hex_utils::hex_str(&counterparty_node_id.serialize()),
 489                         );
 490                         print!("> ");
 491                         io::stdout().flush().unwrap();
 492                 },
 493                 Event::ChannelClosed {
 494                         channel_id,
 495                         reason,
 496                         user_channel_id: _,
 497                         counterparty_node_id,
 498                         channel_capacity_sats: _,
 499                         channel_funding_txo: _,
 500                 } => {
 501                         println!(
 502                                 "\nEVENT: Channel {} with counterparty {} closed due to: {:?}",
 503                                 channel_id,
 504                                 counterparty_node_id.map(|id| format!("{}", id)).unwrap_or("".to_owned()),
 505                                 reason
 506                         );
 507                         print!("> ");
 508                         io::stdout().flush().unwrap();
 509                 },
 510                 Event::DiscardFunding { .. } => {
 511                         // A "real" node should probably "lock" the UTXOs spent in funding transactions until
 512                         // the funding transaction either confirms, or this event is generated.
 513                 },
 514                 Event::HTLCIntercepted { .. } => {},
 515                 Event::BumpTransaction(event) => bump_tx_event_handler.handle_event(&event),
 516                 Event::ConnectionNeeded { node_id, addresses } => {
 517                         tokio::spawn(async move {
 518                                 for address in addresses {
 519                                         if let Ok(sockaddrs) = address.to_socket_addrs() {
 520                                                 for addr in sockaddrs {
 521                                                         let pm = Arc::clone(&peer_manager);
 522                                                         if cli::connect_peer_if_necessary(node_id, addr, pm).await.is_ok() {
 523                                                                 return;
 524                                                         }
 525                                                 }
 526                                         }
 527                                 }
 528                         });
 529                 },
 530         }
 531 }
 532
 533 async fn start_ldk() {
 534         let args = match args::parse_startup_args() {
 535                 Ok(user_args) => user_args,
 536                 Err(()) => return,
 537         };
 538
 539         // Initialize the LDK data directory if necessary.
 540         let ldk_data_dir = format!("{}/.ldk", args.ldk_storage_dir_path);
 541         fs::create_dir_all(ldk_data_dir.clone()).unwrap();
 542
 543         // ## Setup
 544         // Step 1: Initialize the Logger
 545         let logger = Arc::new(FilesystemLogger::new(ldk_data_dir.clone()));
 546
 547         // Initialize our bitcoind client.
 548         let bitcoind_client = match BitcoindClient::new(
 549                 args.bitcoind_rpc_host.clone(),
 550                 args.bitcoind_rpc_port,
 551                 args.bitcoind_rpc_username.clone(),
 552                 args.bitcoind_rpc_password.clone(),
 553                 args.network,
 554                 tokio::runtime::Handle::current(),
 555                 Arc::clone(&logger),
 556         )
 557         .await
 558         {
 559                 Ok(client) => Arc::new(client),
 560                 Err(e) => {
 561                         println!("Failed to connect to bitcoind client: {}", e);
 562                         return;
 563                 },
 564         };
 565
 566         // Check that the bitcoind we've connected to is running the network we expect
 567         let bitcoind_chain = bitcoind_client.get_blockchain_info().await.chain;
 568         if bitcoind_chain
 569                 != match args.network {
 570                         bitcoin::Network::Bitcoin => "main",
 571                         bitcoin::Network::Regtest => "regtest",
 572                         bitcoin::Network::Signet => "signet",
 573                         bitcoin::Network::Testnet | _ => "test",
 574                 } {
 575                 println!(
 576                         "Chain argument ({}) didn't match bitcoind chain ({})",
 577                         args.network, bitcoind_chain
 578                 );
 579                 return;
 580         }
 581
 582         // Step 2: Initialize the FeeEstimator
 583
 584         // BitcoindClient implements the FeeEstimator trait, so it'll act as our fee estimator.
 585         let fee_estimator = bitcoind_client.clone();
 586
 587         // Step 3: Initialize the BroadcasterInterface
 588
 589         // BitcoindClient implements the BroadcasterInterface trait, so it'll act as our transaction
 590         // broadcaster.
 591         let broadcaster = bitcoind_client.clone();
 592
 593         // Step 4: Initialize the KeysManager
 594
 595         // The key seed that we use to derive the node privkey (that corresponds to the node pubkey) and
 596         // other secret key material.
 597         let keys_seed_path = format!("{}/keys_seed", ldk_data_dir.clone());
 598         let keys_seed = if let Ok(seed) = fs::read(keys_seed_path.clone()) {
 599                 assert_eq!(seed.len(), 32);
 600                 let mut key = [0; 32];
 601                 key.copy_from_slice(&seed);
 602                 key
 603         } else {
 604                 let mut key = [0; 32];
 605                 thread_rng().fill_bytes(&mut key);
 606                 match File::create(keys_seed_path.clone()) {
 607                         Ok(mut f) => {
 608                                 Write::write_all(&mut f, &key).expect("Failed to write node keys seed to disk");
 609                                 f.sync_all().expect("Failed to sync node keys seed to disk");
 610                         },
 611                         Err(e) => {
 612                                 println!("ERROR: Unable to create keys seed file {}: {}", keys_seed_path, e);
 613                                 return;
 614                         },
 615                 }
 616                 key
 617         };
 618         let cur = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap();
 619         let keys_manager = Arc::new(KeysManager::new(&keys_seed, cur.as_secs(), cur.subsec_nanos()));
 620
 621         let bump_tx_event_handler = Arc::new(BumpTransactionEventHandler::new(
 622                 Arc::clone(&broadcaster),
 623                 Arc::new(Wallet::new(Arc::clone(&bitcoind_client), Arc::clone(&logger))),
 624                 Arc::clone(&keys_manager),
 625                 Arc::clone(&logger),
 626         ));
 627
 628         // Step 5: Initialize Persistence
 629         let fs_store = Arc::new(FilesystemStore::new(ldk_data_dir.clone().into()));
 630         let persister = Arc::new(MonitorUpdatingPersister::new(
 631                 Arc::clone(&fs_store),
 632                 Arc::clone(&logger),
 633                 1000,
 634                 Arc::clone(&keys_manager),
 635                 Arc::clone(&keys_manager),
 636         ));
 637         // Alternatively, you can use the `FilesystemStore` as a `Persist` directly, at the cost of
 638         // larger `ChannelMonitor` update writes (but no deletion or cleanup):
 639         //let persister = Arc::clone(&fs_store);
 640
 641         // Step 6: Initialize the ChainMonitor
 642         let chain_monitor: Arc<ChainMonitor> = Arc::new(chainmonitor::ChainMonitor::new(
 643                 None,
 644                 Arc::clone(&broadcaster),
 645                 Arc::clone(&logger),
 646                 Arc::clone(&fee_estimator),
 647                 Arc::clone(&persister),
 648         ));
 649
 650         // Step 7: Read ChannelMonitor state from disk
 651         let mut channelmonitors = persister
 652                 .read_all_channel_monitors_with_updates(&bitcoind_client, &bitcoind_client)
 653                 .unwrap();
 654         // If you are using the `FilesystemStore` as a `Persist` directly, use
 655         // `lightning::util::persist::read_channel_monitors` like this:
 656         //read_channel_monitors(Arc::clone(&persister), Arc::clone(&keys_manager), Arc::clone(&keys_manager)).unwrap();
 657
 658         // Step 8: Poll for the best chain tip, which may be used by the channel manager & spv client
 659         let polled_chain_tip = init::validate_best_block_header(bitcoind_client.as_ref())
 660                 .await
 661                 .expect("Failed to fetch best block header and best block");
 662
 663         // Step 9: Initialize routing ProbabilisticScorer
 664         let network_graph_path = format!("{}/network_graph", ldk_data_dir.clone());
 665         let network_graph =
 666                 Arc::new(disk::read_network(Path::new(&network_graph_path), args.network, logger.clone()));
 667
 668         let scorer_path = format!("{}/scorer", ldk_data_dir.clone());
 669         let scorer = Arc::new(RwLock::new(disk::read_scorer(
 670                 Path::new(&scorer_path),
 671                 Arc::clone(&network_graph),
 672                 Arc::clone(&logger),
 673         )));
 674
 675         // Step 10: Create Router
 676         let scoring_fee_params = ProbabilisticScoringFeeParameters::default();
 677         let router = Arc::new(DefaultRouter::new(
 678                 network_graph.clone(),
 679                 logger.clone(),
 680                 keys_manager.get_secure_random_bytes(),
 681                 scorer.clone(),
 682                 scoring_fee_params,
 683         ));
 684
 685         // Step 11: Initialize the ChannelManager
 686         let mut user_config = UserConfig::default();
 687         user_config.channel_handshake_limits.force_announced_channel_preference = false;
 688         user_config.channel_handshake_config.negotiate_anchors_zero_fee_htlc_tx = true;
 689         user_config.manually_accept_inbound_channels = true;
 690         let mut restarting_node = true;
 691         let (channel_manager_blockhash, channel_manager) = {
 692                 if let Ok(mut f) = fs::File::open(format!("{}/manager", ldk_data_dir.clone())) {
 693                         let mut channel_monitor_mut_references = Vec::new();
 694                         for (_, channel_monitor) in channelmonitors.iter_mut() {
 695                                 channel_monitor_mut_references.push(channel_monitor);
 696                         }
 697                         let read_args = ChannelManagerReadArgs::new(
 698                                 keys_manager.clone(),
 699                                 keys_manager.clone(),
 700                                 keys_manager.clone(),
 701                                 fee_estimator.clone(),
 702                                 chain_monitor.clone(),
 703                                 broadcaster.clone(),
 704                                 router,
 705                                 logger.clone(),
 706                                 user_config,
 707                                 channel_monitor_mut_references,
 708                         );
 709                         <(BlockHash, ChannelManager)>::read(&mut f, read_args).unwrap()
 710                 } else {
 711                         // We're starting a fresh node.
 712                         restarting_node = false;
 713
 714                         let polled_best_block = polled_chain_tip.to_best_block();
 715                         let polled_best_block_hash = polled_best_block.block_hash();
 716                         let chain_params =
 717                                 ChainParameters { network: args.network, best_block: polled_best_block };
 718                         let fresh_channel_manager = channelmanager::ChannelManager::new(
 719                                 fee_estimator.clone(),
 720                                 chain_monitor.clone(),
 721                                 broadcaster.clone(),
 722                                 router,
 723                                 logger.clone(),
 724                                 keys_manager.clone(),
 725                                 keys_manager.clone(),
 726                                 keys_manager.clone(),
 727                                 user_config,
 728                                 chain_params,
 729                                 cur.as_secs() as u32,
 730                         );
 731                         (polled_best_block_hash, fresh_channel_manager)
 732                 }
 733         };
 734
 735         // Step 12: Sync ChannelMonitors and ChannelManager to chain tip
 736         let mut chain_listener_channel_monitors = Vec::new();
 737         let mut cache = UnboundedCache::new();
 738         let chain_tip = if restarting_node {
 739                 let mut chain_listeners = vec![(
 740                         channel_manager_blockhash,
 741                         &channel_manager as &(dyn chain::Listen + Send + Sync),
 742                 )];
 743
 744                 for (blockhash, channel_monitor) in channelmonitors.drain(..) {
 745                         let outpoint = channel_monitor.get_funding_txo().0;
 746                         chain_listener_channel_monitors.push((
 747                                 blockhash,
 748                                 (channel_monitor, broadcaster.clone(), fee_estimator.clone(), logger.clone()),
 749                                 outpoint,
 750                         ));
 751                 }
 752
 753                 for monitor_listener_info in chain_listener_channel_monitors.iter_mut() {
 754                         chain_listeners.push((
 755                                 monitor_listener_info.0,
 756                                 &monitor_listener_info.1 as &(dyn chain::Listen + Send + Sync),
 757                         ));
 758                 }
 759
 760                 init::synchronize_listeners(
 761                         bitcoind_client.as_ref(),
 762                         args.network,
 763                         &mut cache,
 764                         chain_listeners,
 765                 )
 766                 .await
 767                 .unwrap()
 768         } else {
 769                 polled_chain_tip
 770         };
 771
 772         // Step 13: Give ChannelMonitors to ChainMonitor
 773         for item in chain_listener_channel_monitors.drain(..) {
 774                 let channel_monitor = item.1 .0;
 775                 let funding_outpoint = item.2;
 776                 assert_eq!(
 777                         chain_monitor.watch_channel(funding_outpoint, channel_monitor),
 778                         Ok(ChannelMonitorUpdateStatus::Completed)
 779                 );
 780         }
 781
 782         // Step 14: Optional: Initialize the P2PGossipSync
 783         let gossip_sync =
 784                 Arc::new(P2PGossipSync::new(Arc::clone(&network_graph), None, Arc::clone(&logger)));
 785
 786         // Step 15: Initialize the PeerManager
 787         let channel_manager: Arc<ChannelManager> = Arc::new(channel_manager);
 788         let onion_messenger: Arc<OnionMessenger> = Arc::new(OnionMessenger::new(
 789                 Arc::clone(&keys_manager),
 790                 Arc::clone(&keys_manager),
 791                 Arc::clone(&logger),
 792                 Arc::new(DefaultMessageRouter::new(Arc::clone(&network_graph))),
 793                 Arc::clone(&channel_manager),
 794                 IgnoringMessageHandler {},
 795         ));
 796         let mut ephemeral_bytes = [0; 32];
 797         let current_time = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs();
 798         rand::thread_rng().fill_bytes(&mut ephemeral_bytes);
 799         let lightning_msg_handler = MessageHandler {
 800                 chan_handler: channel_manager.clone(),
 801                 route_handler: gossip_sync.clone(),
 802                 onion_message_handler: onion_messenger.clone(),
 803                 custom_message_handler: IgnoringMessageHandler {},
 804         };
 805         let peer_manager: Arc<PeerManager> = Arc::new(PeerManager::new(
 806                 lightning_msg_handler,
 807                 current_time.try_into().unwrap(),
 808                 &ephemeral_bytes,
 809                 logger.clone(),
 810                 Arc::clone(&keys_manager),
 811         ));
 812
 813         // Install a GossipVerifier in in the P2PGossipSync
 814         let utxo_lookup = GossipVerifier::new(
 815                 Arc::clone(&bitcoind_client.bitcoind_rpc_client),
 816                 lightning_block_sync::gossip::TokioSpawner,
 817                 Arc::clone(&gossip_sync),
 818                 Arc::clone(&peer_manager),
 819         );
 820         gossip_sync.add_utxo_lookup(Some(utxo_lookup));
 821
 822         // ## Running LDK
 823         // Step 16: Initialize networking
 824
 825         let peer_manager_connection_handler = peer_manager.clone();
 826         let listening_port = args.ldk_peer_listening_port;
 827         let stop_listen_connect = Arc::new(AtomicBool::new(false));
 828         let stop_listen = Arc::clone(&stop_listen_connect);
 829         tokio::spawn(async move {
 830                 let listener = tokio::net::TcpListener::bind(format!("[::]:{}", listening_port))
 831                         .await
 832                         .expect("Failed to bind to listen port - is something else already listening on it?");
 833                 loop {
 834                         let peer_mgr = peer_manager_connection_handler.clone();
 835                         let tcp_stream = listener.accept().await.unwrap().0;
 836                         if stop_listen.load(Ordering::Acquire) {
 837                                 return;
 838                         }
 839                         tokio::spawn(async move {
 840                                 lightning_net_tokio::setup_inbound(
 841                                         peer_mgr.clone(),
 842                                         tcp_stream.into_std().unwrap(),
 843                                 )
 844                                 .await;
 845                         });
 846                 }
 847         });
 848
 849         // Step 17: Connect and Disconnect Blocks
 850         let channel_manager_listener = channel_manager.clone();
 851         let chain_monitor_listener = chain_monitor.clone();
 852         let bitcoind_block_source = bitcoind_client.clone();
 853         let network = args.network;
 854         tokio::spawn(async move {
 855                 let chain_poller = poll::ChainPoller::new(bitcoind_block_source.as_ref(), network);
 856                 let chain_listener = (chain_monitor_listener, channel_manager_listener);
 857                 let mut spv_client = SpvClient::new(chain_tip, chain_poller, &mut cache, &chain_listener);
 858                 loop {
 859                         spv_client.poll_best_tip().await.unwrap();
 860                         tokio::time::sleep(Duration::from_secs(1)).await;
 861                 }
 862         });
 863
 864         let inbound_payments = Arc::new(Mutex::new(disk::read_inbound_payment_info(Path::new(
 865                 &format!("{}/{}", ldk_data_dir, INBOUND_PAYMENTS_FNAME),
 866         ))));
 867         let outbound_payments = Arc::new(Mutex::new(disk::read_outbound_payment_info(Path::new(
 868                 &format!("{}/{}", ldk_data_dir, OUTBOUND_PAYMENTS_FNAME),
 869         ))));
 870         let recent_payments_payment_ids = channel_manager
 871                 .list_recent_payments()
 872                 .into_iter()
 873                 .filter_map(|p| match p {
 874                         RecentPaymentDetails::Pending { payment_id, .. } => Some(payment_id),
 875                         RecentPaymentDetails::Fulfilled { payment_id, .. } => Some(payment_id),
 876                         RecentPaymentDetails::Abandoned { payment_id, .. } => Some(payment_id),
 877                         RecentPaymentDetails::AwaitingInvoice { payment_id } => Some(payment_id),
 878                 })
 879                 .collect::<Vec<PaymentId>>();
 880         for (payment_id, payment_info) in outbound_payments
 881                 .lock()
 882                 .unwrap()
 883                 .payments
 884                 .iter_mut()
 885                 .filter(|(_, i)| matches!(i.status, HTLCStatus::Pending))
 886         {
 887                 if !recent_payments_payment_ids.contains(payment_id) {
 888                         payment_info.status = HTLCStatus::Failed;
 889                 }
 890         }
 891         fs_store
 892                 .write("", "", OUTBOUND_PAYMENTS_FNAME, &outbound_payments.lock().unwrap().encode())
 893                 .unwrap();
 894
 895         // Step 18: Handle LDK Events
 896         let channel_manager_event_listener = Arc::clone(&channel_manager);
 897         let bitcoind_client_event_listener = Arc::clone(&bitcoind_client);
 898         let network_graph_event_listener = Arc::clone(&network_graph);
 899         let keys_manager_event_listener = Arc::clone(&keys_manager);
 900         let inbound_payments_event_listener = Arc::clone(&inbound_payments);
 901         let outbound_payments_event_listener = Arc::clone(&outbound_payments);
 902         let fs_store_event_listener = Arc::clone(&fs_store);
 903         let peer_manager_event_listener = Arc::clone(&peer_manager);
 904         let network = args.network;
 905         let event_handler = move |event: Event| {
 906                 let channel_manager_event_listener = Arc::clone(&channel_manager_event_listener);
 907                 let bitcoind_client_event_listener = Arc::clone(&bitcoind_client_event_listener);
 908                 let network_graph_event_listener = Arc::clone(&network_graph_event_listener);
 909                 let keys_manager_event_listener = Arc::clone(&keys_manager_event_listener);
 910                 let bump_tx_event_handler = Arc::clone(&bump_tx_event_handler);
 911                 let inbound_payments_event_listener = Arc::clone(&inbound_payments_event_listener);
 912                 let outbound_payments_event_listener = Arc::clone(&outbound_payments_event_listener);
 913                 let fs_store_event_listener = Arc::clone(&fs_store_event_listener);
 914                 let peer_manager_event_listener = Arc::clone(&peer_manager_event_listener);
 915                 async move {
 916                         handle_ldk_events(
 917                                 channel_manager_event_listener,
 918                                 &bitcoind_client_event_listener,
 919                                 &network_graph_event_listener,
 920                                 &keys_manager_event_listener,
 921                                 &bump_tx_event_handler,
 922                                 peer_manager_event_listener,
 923                                 inbound_payments_event_listener,
 924                                 outbound_payments_event_listener,
 925                                 fs_store_event_listener,
 926                                 network,
 927                                 event,
 928                         )
 929                         .await;
 930                 }
 931         };
 932
 933         // Step 19: Persist ChannelManager and NetworkGraph
 934         let persister = Arc::new(FilesystemStore::new(ldk_data_dir.clone().into()));
 935
 936         // Step 20: Background Processing
 937         let (bp_exit, bp_exit_check) = tokio::sync::watch::channel(());
 938         let mut background_processor = tokio::spawn(process_events_async(
 939                 Arc::clone(&persister),
 940                 event_handler,
 941                 chain_monitor.clone(),
 942                 channel_manager.clone(),
 943                 GossipSync::p2p(gossip_sync.clone()),
 944                 peer_manager.clone(),
 945                 logger.clone(),
 946                 Some(scorer.clone()),
 947                 move |t| {
 948                         let mut bp_exit_fut_check = bp_exit_check.clone();
 949                         Box::pin(async move {
 950                                 tokio::select! {
 951                                         _ = tokio::time::sleep(t) => false,
 952                                         _ = bp_exit_fut_check.changed() => true,
 953                                 }
 954                         })
 955                 },
 956                 false,
 957                 || Some(SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap()),
 958         ));
 959
 960         // Regularly reconnect to channel peers.
 961         let connect_cm = Arc::clone(&channel_manager);
 962         let connect_pm = Arc::clone(&peer_manager);
 963         let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir);
 964         let stop_connect = Arc::clone(&stop_listen_connect);
 965         tokio::spawn(async move {
 966                 let mut interval = tokio::time::interval(Duration::from_secs(1));
 967                 interval.set_missed_tick_behavior(tokio::time::MissedTickBehavior::Delay);
 968                 loop {
 969                         interval.tick().await;
 970                         match disk::read_channel_peer_data(Path::new(&peer_data_path)) {
 971                                 Ok(info) => {
 972                                         let peers = connect_pm.get_peer_node_ids();
 973                                         for node_id in connect_cm
 974                                                 .list_channels()
 975                                                 .iter()
 976                                                 .map(|chan| chan.counterparty.node_id)
 977                                                 .filter(|id| !peers.iter().any(|(pk, _)| id == pk))
 978                                         {
 979                                                 if stop_connect.load(Ordering::Acquire) {
 980                                                         return;
 981                                                 }
 982                                                 for (pubkey, peer_addr) in info.iter() {
 983                                                         if *pubkey == node_id {
 984                                                                 let _ = cli::do_connect_peer(
 985                                                                         *pubkey,
 986                                                                         peer_addr.clone(),
 987                                                                         Arc::clone(&connect_pm),
 988                                                                 )
 989                                                                 .await;
 990                                                         }
 991                                                 }
 992                                         }
 993                                 },
 994                                 Err(e) => println!("ERROR: errored reading channel peer info from disk: {:?}", e),
 995                         }
 996                 }
 997         });
 998
 999         // Regularly broadcast our node_announcement. This is only required (or possible) if we have
1000         // some public channels.
1001         let peer_man = Arc::clone(&peer_manager);
1002         let chan_man = Arc::clone(&channel_manager);
1003         let network = args.network;
1004         tokio::spawn(async move {
1005                 // First wait a minute until we have some peers and maybe have opened a channel.
1006                 tokio::time::sleep(Duration::from_secs(60)).await;
1007                 // Then, update our announcement once an hour to keep it fresh but avoid unnecessary churn
1008                 // in the global gossip network.
1009                 let mut interval = tokio::time::interval(Duration::from_secs(3600));
1010                 loop {
1011                         interval.tick().await;
1012                         // Don't bother trying to announce if we don't have any public channls, though our
1013                         // peers should drop such an announcement anyway. Note that announcement may not
1014                         // propagate until we have a channel with 6+ confirmations.
1015                         if chan_man.list_channels().iter().any(|chan| chan.is_public) {
1016                                 peer_man.broadcast_node_announcement(
1017                                         [0; 3],
1018                                         args.ldk_announced_node_name,
1019                                         args.ldk_announced_listen_addr.clone(),
1020                                 );
1021                         }
1022                 }
1023         });
1024
1025         tokio::spawn(sweep::periodic_sweep(
1026                 ldk_data_dir.clone(),
1027                 Arc::clone(&keys_manager),
1028                 Arc::clone(&logger),
1029                 Arc::clone(&persister),
1030                 Arc::clone(&bitcoind_client),
1031                 Arc::clone(&channel_manager),
1032         ));
1033
1034         // Start the CLI.
1035         let cli_channel_manager = Arc::clone(&channel_manager);
1036         let cli_persister = Arc::clone(&persister);
1037         let cli_logger = Arc::clone(&logger);
1038         let cli_peer_manager = Arc::clone(&peer_manager);
1039         let cli_poll = tokio::task::spawn_blocking(move || {
1040                 cli::poll_for_user_input(
1041                         cli_peer_manager,
1042                         cli_channel_manager,
1043                         keys_manager,
1044                         network_graph,
1045                         onion_messenger,
1046                         inbound_payments,
1047                         outbound_payments,
1048                         ldk_data_dir,
1049                         network,
1050                         cli_logger,
1051                         cli_persister,
1052                 )
1053         });
1054
1055         // Exit if either CLI polling exits or the background processor exits (which shouldn't happen
1056         // unless we fail to write to the filesystem).
1057         let mut bg_res = Ok(Ok(()));
1058         tokio::select! {
1059                 _ = cli_poll => {},
1060                 bg_exit = &mut background_processor => {
1061                         bg_res = bg_exit;
1062                 },
1063         }
1064
1065         // Disconnect our peers and stop accepting new connections. This ensures we don't continue
1066         // updating our channel data after we've stopped the background processor.
1067         stop_listen_connect.store(true, Ordering::Release);
1068         peer_manager.disconnect_all_peers();
1069
1070         if let Err(e) = bg_res {
1071                 let persist_res = persister
1072                         .write(
1073                                 persist::CHANNEL_MANAGER_PERSISTENCE_PRIMARY_NAMESPACE,
1074                                 persist::CHANNEL_MANAGER_PERSISTENCE_SECONDARY_NAMESPACE,
1075                                 persist::CHANNEL_MANAGER_PERSISTENCE_KEY,
1076                                 &channel_manager.encode(),
1077                         )
1078                         .unwrap();
1079                 use lightning::util::logger::Logger;
1080                 lightning::log_error!(
1081                         &*logger,
1082                         "Last-ditch ChannelManager persistence result: {:?}",
1083                         persist_res
1084                 );
1085                 panic!(
1086                         "ERR: background processing stopped with result {:?}, exiting.\n\
1087                         Last-ditch ChannelManager persistence result {:?}",
1088                         e, persist_res
1089                 );
1090         }
1091
1092         // Stop the background processor.
1093         if !bp_exit.is_closed() {
1094                 bp_exit.send(()).unwrap();
1095                 background_processor.await.unwrap().unwrap();
1096         }
1097 }
1098
1099 #[tokio::main]
1100 pub async fn main() {
1101         #[cfg(not(target_os = "windows"))]
1102         {
1103                 // Catch Ctrl-C with a dummy signal handler.
1104                 unsafe {
1105                         let mut new_action: libc::sigaction = core::mem::zeroed();
1106                         let mut old_action: libc::sigaction = core::mem::zeroed();
1107
1108                         extern "C" fn dummy_handler(
1109                                 _: libc::c_int, _: *const libc::siginfo_t, _: *const libc::c_void,
1110                         ) {
1111                         }
1112
1113                         new_action.sa_sigaction = dummy_handler as libc::sighandler_t;
1114                         new_action.sa_flags = libc::SA_SIGINFO;
1115
1116                         libc::sigaction(
1117                                 libc::SIGINT,
1118                                 &new_action as *const libc::sigaction,
1119                                 &mut old_action as *mut libc::sigaction,
1120                         );
1121                 }
1122         }
1123
1124         start_ldk().await;
1125 }