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

   1 use crate::disk;
   2 use crate::hex_utils;
   3 use crate::{
   4         ChannelManager, FilesystemLogger, HTLCStatus, MillisatAmount, PaymentInfo, PaymentInfoStorage,
   5         PeerManager,
   6 };
   7 use bitcoin::network::constants::Network;
   8 use bitcoin::secp256k1::key::PublicKey;
   9 use lightning::chain;
  10 use lightning::chain::keysinterface::KeysManager;
  11 use lightning::ln::features::InvoiceFeatures;
  12 use lightning::ln::{PaymentHash, PaymentSecret};
  13 use lightning::routing::network_graph::NetGraphMsgHandler;
  14 use lightning::routing::router;
  15 use lightning::routing::router::RouteHintHop;
  16 use lightning::util::config::UserConfig;
  17 use lightning_invoice::{utils, Currency, Invoice};
  18 use std::env;
  19 use std::io;
  20 use std::io::{BufRead, Write};
  21 use std::net::{SocketAddr, TcpStream};
  22 use std::ops::Deref;
  23 use std::path::Path;
  24 use std::str::FromStr;
  25 use std::sync::Arc;
  26 use std::time::Duration;
  27 use tokio::sync::mpsc;
  28
  29 pub(crate) struct LdkUserInfo {
  30         pub(crate) bitcoind_rpc_username: String,
  31         pub(crate) bitcoind_rpc_password: String,
  32         pub(crate) bitcoind_rpc_port: u16,
  33         pub(crate) bitcoind_rpc_host: String,
  34         pub(crate) ldk_storage_dir_path: String,
  35         pub(crate) ldk_peer_listening_port: u16,
  36         pub(crate) network: Network,
  37 }
  38
  39 pub(crate) fn parse_startup_args() -> Result<LdkUserInfo, ()> {
  40         if env::args().len() < 3 {
  41                 println!("ldk-tutorial-node requires 3 arguments: `cargo run <bitcoind-rpc-username>:<bitcoind-rpc-password>@<bitcoind-rpc-host>:<bitcoind-rpc-port> ldk_storage_directory_path [<ldk-incoming-peer-listening-port>] [bitcoin-network]`");
  42                 return Err(());
  43         }
  44         let bitcoind_rpc_info = env::args().skip(1).next().unwrap();
  45         let bitcoind_rpc_info_parts: Vec<&str> = bitcoind_rpc_info.split("@").collect();
  46         if bitcoind_rpc_info_parts.len() != 2 {
  47                 println!("ERROR: bad bitcoind RPC URL provided");
  48                 return Err(());
  49         }
  50         let rpc_user_and_password: Vec<&str> = bitcoind_rpc_info_parts[0].split(":").collect();
  51         if rpc_user_and_password.len() != 2 {
  52                 println!("ERROR: bad bitcoind RPC username/password combo provided");
  53                 return Err(());
  54         }
  55         let bitcoind_rpc_username = rpc_user_and_password[0].to_string();
  56         let bitcoind_rpc_password = rpc_user_and_password[1].to_string();
  57         let bitcoind_rpc_path: Vec<&str> = bitcoind_rpc_info_parts[1].split(":").collect();
  58         if bitcoind_rpc_path.len() != 2 {
  59                 println!("ERROR: bad bitcoind RPC path provided");
  60                 return Err(());
  61         }
  62         let bitcoind_rpc_host = bitcoind_rpc_path[0].to_string();
  63         let bitcoind_rpc_port = bitcoind_rpc_path[1].parse::<u16>().unwrap();
  64
  65         let ldk_storage_dir_path = env::args().skip(2).next().unwrap();
  66
  67         let mut ldk_peer_port_set = true;
  68         let ldk_peer_listening_port: u16 = match env::args().skip(3).next().map(|p| p.parse()) {
  69                 Some(Ok(p)) => p,
  70                 Some(Err(e)) => panic!("{}", e),
  71                 None => {
  72                         ldk_peer_port_set = false;
  73                         9735
  74                 }
  75         };
  76
  77         let arg_idx = match ldk_peer_port_set {
  78                 true => 4,
  79                 false => 3,
  80         };
  81         let network: Network = match env::args().skip(arg_idx).next().as_ref().map(String::as_str) {
  82                 Some("testnet") => Network::Testnet,
  83                 Some("regtest") => Network::Regtest,
  84                 Some(_) => panic!("Unsupported network provided. Options are: `regtest`, `testnet`"),
  85                 None => Network::Testnet,
  86         };
  87         Ok(LdkUserInfo {
  88                 bitcoind_rpc_username,
  89                 bitcoind_rpc_password,
  90                 bitcoind_rpc_host,
  91                 bitcoind_rpc_port,
  92                 ldk_storage_dir_path,
  93                 ldk_peer_listening_port,
  94                 network,
  95         })
  96 }
  97
  98 pub(crate) async fn poll_for_user_input(
  99         peer_manager: Arc<PeerManager>, channel_manager: Arc<ChannelManager>,
 100         keys_manager: Arc<KeysManager>,
 101         router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access + Send + Sync>, Arc<FilesystemLogger>>>,
 102         inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage,
 103         event_notifier: mpsc::Sender<()>, ldk_data_dir: String, logger: Arc<FilesystemLogger>,
 104         network: Network,
 105 ) {
 106         println!("LDK startup successful. To view available commands: \"help\".");
 107         println!("LDK logs are available at <your-supplied-ldk-data-dir-path>/.ldk/logs");
 108         println!("Local Node ID is {}.", channel_manager.get_our_node_id());
 109         let stdin = io::stdin();
 110         print!("> ");
 111         io::stdout().flush().unwrap(); // Without flushing, the `>` doesn't print
 112         for line in stdin.lock().lines() {
 113                 let _ = event_notifier.try_send(());
 114                 let line = line.unwrap();
 115                 let mut words = line.split_whitespace();
 116                 if let Some(word) = words.next() {
 117                         match word {
 118                                 "help" => help(),
 119                                 "openchannel" => {
 120                                         let peer_pubkey_and_ip_addr = words.next();
 121                                         let channel_value_sat = words.next();
 122                                         if peer_pubkey_and_ip_addr.is_none() || channel_value_sat.is_none() {
 123                                                 println!("ERROR: openchannel has 2 required arguments: `openchannel pubkey@host:port channel_amt_satoshis` [--public]");
 124                                                 print!("> ");
 125                                                 io::stdout().flush().unwrap();
 126                                                 continue;
 127                                         }
 128                                         let peer_pubkey_and_ip_addr = peer_pubkey_and_ip_addr.unwrap();
 129                                         let (pubkey, peer_addr) =
 130                                                 match parse_peer_info(peer_pubkey_and_ip_addr.to_string()) {
 131                                                         Ok(info) => info,
 132                                                         Err(e) => {
 133                                                                 println!("{:?}", e.into_inner().unwrap());
 134                                                                 print!("> ");
 135                                                                 io::stdout().flush().unwrap();
 136                                                                 continue;
 137                                                         }
 138                                                 };
 139
 140                                         let chan_amt_sat: Result<u64, _> = channel_value_sat.unwrap().parse();
 141                                         if chan_amt_sat.is_err() {
 142                                                 println!("ERROR: channel amount must be a number");
 143                                                 print!("> ");
 144                                                 io::stdout().flush().unwrap();
 145                                                 continue;
 146                                         }
 147
 148                                         if connect_peer_if_necessary(
 149                                                 pubkey,
 150                                                 peer_addr,
 151                                                 peer_manager.clone(),
 152                                                 event_notifier.clone(),
 153                                         )
 154                                         .is_err()
 155                                         {
 156                                                 print!("> ");
 157                                                 io::stdout().flush().unwrap();
 158                                                 continue;
 159                                         };
 160
 161                                         let announce_channel = match words.next() {
 162                                                 Some("--public") | Some("--public=true") => true,
 163                                                 Some("--public=false") => false,
 164                                                 Some(_) => {
 165                                                         println!("ERROR: invalid `--public` command format. Valid formats: `--public`, `--public=true` `--public=false`");
 166                                                         print!("> ");
 167                                                         io::stdout().flush().unwrap();
 168                                                         continue;
 169                                                 }
 170                                                 None => false,
 171                                         };
 172
 173                                         if open_channel(
 174                                                 pubkey,
 175                                                 chan_amt_sat.unwrap(),
 176                                                 announce_channel,
 177                                                 channel_manager.clone(),
 178                                         )
 179                                         .is_ok()
 180                                         {
 181                                                 let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
 182                                                 let _ = disk::persist_channel_peer(
 183                                                         Path::new(&peer_data_path),
 184                                                         peer_pubkey_and_ip_addr,
 185                                                 );
 186                                         }
 187                                 }
 188                                 "sendpayment" => {
 189                                         let invoice_str = words.next();
 190                                         if invoice_str.is_none() {
 191                                                 println!("ERROR: sendpayment requires an invoice: `sendpayment <invoice>`");
 192                                                 print!("> ");
 193                                                 io::stdout().flush().unwrap();
 194                                                 continue;
 195                                         }
 196
 197                                         let invoice = match Invoice::from_str(invoice_str.unwrap()) {
 198                                                 Ok(inv) => inv,
 199                                                 Err(e) => {
 200                                                         println!("ERROR: invalid invoice: {:?}", e);
 201                                                         print!("> ");
 202                                                         io::stdout().flush().unwrap();
 203                                                         continue;
 204                                                 }
 205                                         };
 206                                         let mut route_hints = invoice.routes().clone();
 207                                         let mut last_hops = Vec::new();
 208                                         for hint in route_hints.drain(..) {
 209                                                 last_hops.push(hint[hint.len() - 1].clone());
 210                                         }
 211
 212                                         let amt_pico_btc = invoice.amount_pico_btc();
 213                                         if amt_pico_btc.is_none() {
 214                                                 println!("ERROR: invalid invoice: must contain amount to pay");
 215                                                 print!("> ");
 216                                                 io::stdout().flush().unwrap();
 217                                                 continue;
 218                                         }
 219                                         let amt_msat = amt_pico_btc.unwrap() / 10;
 220
 221                                         let payee_pubkey = invoice.recover_payee_pub_key();
 222                                         let final_cltv = invoice.min_final_cltv_expiry() as u32;
 223
 224                                         let mut payment_hash = PaymentHash([0; 32]);
 225                                         payment_hash.0.copy_from_slice(&invoice.payment_hash().as_ref()[0..32]);
 226
 227                                         let payment_secret = match invoice.payment_secret() {
 228                                                 Some(secret) => {
 229                                                         let mut payment_secret = PaymentSecret([0; 32]);
 230                                                         payment_secret.0.copy_from_slice(&secret.0);
 231                                                         Some(payment_secret)
 232                                                 }
 233                                                 None => None,
 234                                         };
 235
 236                                         let invoice_features = match invoice.features() {
 237                                                 Some(feat) => Some(feat.clone()),
 238                                                 None => None,
 239                                         };
 240
 241                                         send_payment(
 242                                                 payee_pubkey,
 243                                                 amt_msat,
 244                                                 final_cltv,
 245                                                 payment_hash,
 246                                                 payment_secret,
 247                                                 invoice_features,
 248                                                 last_hops,
 249                                                 router.clone(),
 250                                                 channel_manager.clone(),
 251                                                 outbound_payments.clone(),
 252                                                 logger.clone(),
 253                                         );
 254                                 }
 255                                 "getinvoice" => {
 256                                         let amt_str = words.next();
 257                                         if amt_str.is_none() {
 258                                                 println!("ERROR: getinvoice requires an amount in millisatoshis");
 259                                                 print!("> ");
 260                                                 io::stdout().flush().unwrap();
 261                                                 continue;
 262                                         }
 263
 264                                         let amt_msat: Result<u64, _> = amt_str.unwrap().parse();
 265                                         if amt_msat.is_err() {
 266                                                 println!("ERROR: getinvoice provided payment amount was not a number");
 267                                                 print!("> ");
 268                                                 io::stdout().flush().unwrap();
 269                                                 continue;
 270                                         }
 271                                         get_invoice(
 272                                                 amt_msat.unwrap(),
 273                                                 inbound_payments.clone(),
 274                                                 channel_manager.clone(),
 275                                                 keys_manager.clone(),
 276                                                 network,
 277                                         );
 278                                 }
 279                                 "connectpeer" => {
 280                                         let peer_pubkey_and_ip_addr = words.next();
 281                                         if peer_pubkey_and_ip_addr.is_none() {
 282                                                 println!("ERROR: connectpeer requires peer connection info: `connectpeer pubkey@host:port`");
 283                                                 print!("> ");
 284                                                 io::stdout().flush().unwrap();
 285                                                 continue;
 286                                         }
 287                                         let (pubkey, peer_addr) =
 288                                                 match parse_peer_info(peer_pubkey_and_ip_addr.unwrap().to_string()) {
 289                                                         Ok(info) => info,
 290                                                         Err(e) => {
 291                                                                 println!("{:?}", e.into_inner().unwrap());
 292                                                                 print!("> ");
 293                                                                 io::stdout().flush().unwrap();
 294                                                                 continue;
 295                                                         }
 296                                                 };
 297                                         if connect_peer_if_necessary(
 298                                                 pubkey,
 299                                                 peer_addr,
 300                                                 peer_manager.clone(),
 301                                                 event_notifier.clone(),
 302                                         )
 303                                         .is_ok()
 304                                         {
 305                                                 println!("SUCCESS: connected to peer {}", pubkey);
 306                                         }
 307                                 }
 308                                 "listchannels" => list_channels(channel_manager.clone()),
 309                                 "listpayments" => {
 310                                         list_payments(inbound_payments.clone(), outbound_payments.clone())
 311                                 }
 312                                 "closechannel" => {
 313                                         let channel_id_str = words.next();
 314                                         if channel_id_str.is_none() {
 315                                                 println!("ERROR: closechannel requires a channel ID: `closechannel <channel_id>`");
 316                                                 print!("> ");
 317                                                 io::stdout().flush().unwrap();
 318                                                 continue;
 319                                         }
 320                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 321                                         if channel_id_vec.is_none() {
 322                                                 println!("ERROR: couldn't parse channel_id as hex");
 323                                                 print!("> ");
 324                                                 io::stdout().flush().unwrap();
 325                                                 continue;
 326                                         }
 327                                         let mut channel_id = [0; 32];
 328                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 329                                         close_channel(channel_id, channel_manager.clone());
 330                                 }
 331                                 "forceclosechannel" => {
 332                                         let channel_id_str = words.next();
 333                                         if channel_id_str.is_none() {
 334                                                 println!("ERROR: forceclosechannel requires a channel ID: `forceclosechannel <channel_id>`");
 335                                                 print!("> ");
 336                                                 io::stdout().flush().unwrap();
 337                                                 continue;
 338                                         }
 339                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 340                                         if channel_id_vec.is_none() {
 341                                                 println!("ERROR: couldn't parse channel_id as hex");
 342                                                 print!("> ");
 343                                                 io::stdout().flush().unwrap();
 344                                                 continue;
 345                                         }
 346                                         let mut channel_id = [0; 32];
 347                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 348                                         force_close_channel(channel_id, channel_manager.clone());
 349                                 }
 350                                 "nodeinfo" => node_info(channel_manager.clone(), peer_manager.clone()),
 351                                 "listpeers" => list_peers(peer_manager.clone()),
 352                                 _ => println!("Unknown command. See `\"help\" for available commands."),
 353                         }
 354                 }
 355                 print!("> ");
 356                 io::stdout().flush().unwrap();
 357         }
 358 }
 359
 360 fn help() {
 361         println!("openchannel pubkey@host:port <channel_amt_satoshis>");
 362         println!("sendpayment <invoice>");
 363         println!("getinvoice <amt_in_millisatoshis>");
 364         println!("connectpeer pubkey@host:port");
 365         println!("listchannels");
 366         println!("listpayments");
 367         println!("closechannel <channel_id>");
 368         println!("forceclosechannel <channel_id>");
 369 }
 370
 371 fn node_info(channel_manager: Arc<ChannelManager>, peer_manager: Arc<PeerManager>) {
 372         println!("\t{{");
 373         println!("\t\t node_pubkey: {}", channel_manager.get_our_node_id());
 374         println!("\t\t num_channels: {}", channel_manager.list_channels().len());
 375         println!("\t\t num_usable_channels: {}", channel_manager.list_usable_channels().len());
 376         println!("\t\t num_peers: {}", peer_manager.get_peer_node_ids().len());
 377         println!("\t}},");
 378 }
 379
 380 fn list_peers(peer_manager: Arc<PeerManager>) {
 381         println!("\t{{");
 382         for pubkey in peer_manager.get_peer_node_ids() {
 383                 println!("\t\t pubkey: {}", pubkey);
 384         }
 385         println!("\t}},");
 386 }
 387
 388 fn list_channels(channel_manager: Arc<ChannelManager>) {
 389         print!("[");
 390         for chan_info in channel_manager.list_channels() {
 391                 println!("");
 392                 println!("\t{{");
 393                 println!("\t\tchannel_id: {},", hex_utils::hex_str(&chan_info.channel_id[..]));
 394                 println!(
 395                         "\t\tpeer_pubkey: {},",
 396                         hex_utils::hex_str(&chan_info.remote_network_id.serialize())
 397                 );
 398                 let mut pending_channel = false;
 399                 match chan_info.short_channel_id {
 400                         Some(id) => println!("\t\tshort_channel_id: {},", id),
 401                         None => {
 402                                 pending_channel = true;
 403                         }
 404                 }
 405                 println!("\t\tpending_open: {},", pending_channel);
 406                 println!("\t\tchannel_value_satoshis: {},", chan_info.channel_value_satoshis);
 407                 println!("\t\tchannel_can_send_payments: {},", chan_info.is_live);
 408                 println!("\t}},");
 409         }
 410         println!("]");
 411 }
 412
 413 fn list_payments(inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage) {
 414         let inbound = inbound_payments.lock().unwrap();
 415         let outbound = outbound_payments.lock().unwrap();
 416         print!("[");
 417         for (payment_hash, payment_info) in inbound.deref() {
 418                 println!("");
 419                 println!("\t{{");
 420                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 421                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 422                 println!("\t\thtlc_direction: inbound,");
 423                 println!(
 424                         "\t\thtlc_status: {},",
 425                         match payment_info.status {
 426                                 HTLCStatus::Pending => "pending",
 427                                 HTLCStatus::Succeeded => "succeeded",
 428                                 HTLCStatus::Failed => "failed",
 429                         }
 430                 );
 431
 432                 println!("\t}},");
 433         }
 434
 435         for (payment_hash, payment_info) in outbound.deref() {
 436                 println!("");
 437                 println!("\t{{");
 438                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 439                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 440                 println!("\t\thtlc_direction: outbound,");
 441                 println!(
 442                         "\t\thtlc_status: {},",
 443                         match payment_info.status {
 444                                 HTLCStatus::Pending => "pending",
 445                                 HTLCStatus::Succeeded => "succeeded",
 446                                 HTLCStatus::Failed => "failed",
 447                         }
 448                 );
 449
 450                 println!("\t}},");
 451         }
 452         println!("]");
 453 }
 454
 455 pub(crate) fn connect_peer_if_necessary(
 456         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 457         event_notifier: mpsc::Sender<()>,
 458 ) -> Result<(), ()> {
 459         for node_pubkey in peer_manager.get_peer_node_ids() {
 460                 if node_pubkey == pubkey {
 461                         return Ok(());
 462                 }
 463         }
 464         match TcpStream::connect_timeout(&peer_addr, Duration::from_secs(10)) {
 465                 Ok(stream) => {
 466                         let peer_mgr = peer_manager.clone();
 467                         let event_ntfns = event_notifier.clone();
 468                         tokio::spawn(async move {
 469                                 lightning_net_tokio::setup_outbound(peer_mgr, event_ntfns, pubkey, stream).await;
 470                         });
 471                         let mut peer_connected = false;
 472                         while !peer_connected {
 473                                 for node_pubkey in peer_manager.get_peer_node_ids() {
 474                                         if node_pubkey == pubkey {
 475                                                 peer_connected = true;
 476                                         }
 477                                 }
 478                         }
 479                 }
 480                 Err(e) => {
 481                         println!("ERROR: failed to connect to peer: {:?}", e);
 482                         return Err(());
 483                 }
 484         }
 485         Ok(())
 486 }
 487
 488 fn open_channel(
 489         peer_pubkey: PublicKey, channel_amt_sat: u64, announce_channel: bool,
 490         channel_manager: Arc<ChannelManager>,
 491 ) -> Result<(), ()> {
 492         let mut config = UserConfig::default();
 493         if announce_channel {
 494                 config.channel_options.announced_channel = true;
 495         }
 496         // lnd's max to_self_delay is 2016, so we want to be compatible.
 497         config.peer_channel_config_limits.their_to_self_delay = 2016;
 498         match channel_manager.create_channel(peer_pubkey, channel_amt_sat, 0, 0, None) {
 499                 Ok(_) => {
 500                         println!("EVENT: initiated channel with peer {}. ", peer_pubkey);
 501                         return Ok(());
 502                 }
 503                 Err(e) => {
 504                         println!("ERROR: failed to open channel: {:?}", e);
 505                         return Err(());
 506                 }
 507         }
 508 }
 509
 510 fn send_payment(
 511         payee: PublicKey, amt_msat: u64, final_cltv: u32, payment_hash: PaymentHash,
 512         payment_secret: Option<PaymentSecret>, payee_features: Option<InvoiceFeatures>,
 513         route_hints: Vec<RouteHintHop>,
 514         router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access + Send + Sync>, Arc<FilesystemLogger>>>,
 515         channel_manager: Arc<ChannelManager>, payment_storage: PaymentInfoStorage,
 516         logger: Arc<FilesystemLogger>,
 517 ) {
 518         let network_graph = router.network_graph.read().unwrap();
 519         let first_hops = channel_manager.list_usable_channels();
 520         let payer_pubkey = channel_manager.get_our_node_id();
 521
 522         let route = router::get_route(
 523                 &payer_pubkey,
 524                 &network_graph,
 525                 &payee,
 526                 payee_features,
 527                 Some(&first_hops.iter().collect::<Vec<_>>()),
 528                 &route_hints.iter().collect::<Vec<_>>(),
 529                 amt_msat,
 530                 final_cltv,
 531                 logger,
 532         );
 533         if let Err(e) = route {
 534                 println!("ERROR: failed to find route: {}", e.err);
 535                 return;
 536         }
 537         let status = match channel_manager.send_payment(&route.unwrap(), payment_hash, &payment_secret)
 538         {
 539                 Ok(()) => {
 540                         println!("EVENT: initiated sending {} msats to {}", amt_msat, payee);
 541                         HTLCStatus::Pending
 542                 }
 543                 Err(e) => {
 544                         println!("ERROR: failed to send payment: {:?}", e);
 545                         HTLCStatus::Failed
 546                 }
 547         };
 548         let mut payments = payment_storage.lock().unwrap();
 549         payments.insert(
 550                 payment_hash,
 551                 PaymentInfo {
 552                         preimage: None,
 553                         secret: payment_secret,
 554                         status,
 555                         amt_msat: MillisatAmount(Some(amt_msat)),
 556                 },
 557         );
 558 }
 559
 560 fn get_invoice(
 561         amt_msat: u64, payment_storage: PaymentInfoStorage, channel_manager: Arc<ChannelManager>,
 562         keys_manager: Arc<KeysManager>, network: Network,
 563 ) {
 564         let mut payments = payment_storage.lock().unwrap();
 565         let currency = match network {
 566                 Network::Bitcoin => Currency::Bitcoin,
 567                 Network::Testnet => Currency::BitcoinTestnet,
 568                 Network::Regtest => Currency::Regtest,
 569                 Network::Signet => panic!("Signet unsupported"),
 570         };
 571         let invoice = match utils::create_invoice_from_channelmanager(
 572                 &channel_manager,
 573                 keys_manager,
 574                 currency,
 575                 Some(amt_msat),
 576                 "ldk-tutorial-node".to_string(),
 577         ) {
 578                 Ok(inv) => {
 579                         println!("SUCCESS: generated invoice: {}", inv);
 580                         inv
 581                 }
 582                 Err(e) => {
 583                         println!("ERROR: failed to create invoice: {:?}", e);
 584                         return;
 585                 }
 586         };
 587
 588         let mut payment_hash = PaymentHash([0; 32]);
 589         payment_hash.0.copy_from_slice(&invoice.payment_hash().as_ref()[0..32]);
 590         payments.insert(
 591                 payment_hash,
 592                 PaymentInfo {
 593                         preimage: None,
 594                         // We can't add payment secrets to invoices until we support features in invoices.
 595                         // Otherwise lnd errors with "destination hop doesn't understand payment addresses"
 596                         // (for context, lnd calls payment secrets "payment addresses").
 597                         secret: Some(invoice.payment_secret().unwrap().clone()),
 598                         status: HTLCStatus::Pending,
 599                         amt_msat: MillisatAmount(Some(amt_msat)),
 600                 },
 601         );
 602 }
 603
 604 fn close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 605         match channel_manager.close_channel(&channel_id) {
 606                 Ok(()) => println!("EVENT: initiating channel close"),
 607                 Err(e) => println!("ERROR: failed to close channel: {:?}", e),
 608         }
 609 }
 610
 611 fn force_close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 612         match channel_manager.force_close_channel(&channel_id) {
 613                 Ok(()) => println!("EVENT: initiating channel force-close"),
 614                 Err(e) => println!("ERROR: failed to force-close channel: {:?}", e),
 615         }
 616 }
 617
 618 pub(crate) fn parse_peer_info(
 619         peer_pubkey_and_ip_addr: String,
 620 ) -> Result<(PublicKey, SocketAddr), std::io::Error> {
 621         let mut pubkey_and_addr = peer_pubkey_and_ip_addr.split("@");
 622         let pubkey = pubkey_and_addr.next();
 623         let peer_addr_str = pubkey_and_addr.next();
 624         if peer_addr_str.is_none() || peer_addr_str.is_none() {
 625                 return Err(std::io::Error::new(
 626                         std::io::ErrorKind::Other,
 627                         "ERROR: incorrectly formatted peer
 628         info. Should be formatted as: `pubkey@host:port`",
 629                 ));
 630         }
 631
 632         let peer_addr: Result<SocketAddr, _> = peer_addr_str.unwrap().parse();
 633         if peer_addr.is_err() {
 634                 return Err(std::io::Error::new(
 635                         std::io::ErrorKind::Other,
 636                         "ERROR: couldn't parse pubkey@host:port into a socket address",
 637                 ));
 638         }
 639
 640         let pubkey = hex_utils::to_compressed_pubkey(pubkey.unwrap());
 641         if pubkey.is_none() {
 642                 return Err(std::io::Error::new(
 643                         std::io::ErrorKind::Other,
 644                         "ERROR: unable to parse given pubkey for node",
 645                 ));
 646         }
 647
 648         Ok((pubkey.unwrap(), peer_addr.unwrap()))
 649 }