_ 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::msgs::NetAddress;
  13 use lightning::ln::{PaymentHash, PaymentSecret};
  14 use lightning::routing::network_graph::NetGraphMsgHandler;
  15 use lightning::routing::router;
  16 use lightning::routing::router::RouteHint;
  17 use lightning::util::config::{ChannelConfig, ChannelHandshakeLimits, UserConfig};
  18 use lightning_invoice::{utils, Currency, Invoice};
  19 use std::env;
  20 use std::io;
  21 use std::io::{BufRead, Write};
  22 use std::net::{IpAddr, SocketAddr, ToSocketAddrs};
  23 use std::ops::Deref;
  24 use std::path::Path;
  25 use std::str::FromStr;
  26 use std::sync::Arc;
  27 use std::time::Duration;
  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) ldk_announced_listen_addr: Option<NetAddress>,
  37         pub(crate) ldk_announced_node_name: [u8; 32],
  38         pub(crate) network: Network,
  39 }
  40
  41 pub(crate) fn parse_startup_args() -> Result<LdkUserInfo, ()> {
  42         if env::args().len() < 3 {
  43                 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] [announced-listen-addr announced-node-name]`");
  44                 return Err(());
  45         }
  46         let bitcoind_rpc_info = env::args().skip(1).next().unwrap();
  47         let bitcoind_rpc_info_parts: Vec<&str> = bitcoind_rpc_info.split("@").collect();
  48         if bitcoind_rpc_info_parts.len() != 2 {
  49                 println!("ERROR: bad bitcoind RPC URL provided");
  50                 return Err(());
  51         }
  52         let rpc_user_and_password: Vec<&str> = bitcoind_rpc_info_parts[0].split(":").collect();
  53         if rpc_user_and_password.len() != 2 {
  54                 println!("ERROR: bad bitcoind RPC username/password combo provided");
  55                 return Err(());
  56         }
  57         let bitcoind_rpc_username = rpc_user_and_password[0].to_string();
  58         let bitcoind_rpc_password = rpc_user_and_password[1].to_string();
  59         let bitcoind_rpc_path: Vec<&str> = bitcoind_rpc_info_parts[1].split(":").collect();
  60         if bitcoind_rpc_path.len() != 2 {
  61                 println!("ERROR: bad bitcoind RPC path provided");
  62                 return Err(());
  63         }
  64         let bitcoind_rpc_host = bitcoind_rpc_path[0].to_string();
  65         let bitcoind_rpc_port = bitcoind_rpc_path[1].parse::<u16>().unwrap();
  66
  67         let ldk_storage_dir_path = env::args().skip(2).next().unwrap();
  68
  69         let mut ldk_peer_port_set = true;
  70         let ldk_peer_listening_port: u16 = match env::args().skip(3).next().map(|p| p.parse()) {
  71                 Some(Ok(p)) => p,
  72                 Some(Err(e)) => panic!("{}", e),
  73                 None => {
  74                         ldk_peer_port_set = false;
  75                         9735
  76                 }
  77         };
  78
  79         let arg_idx = match ldk_peer_port_set {
  80                 true => 4,
  81                 false => 3,
  82         };
  83         let network: Network = match env::args().skip(arg_idx).next().as_ref().map(String::as_str) {
  84                 Some("testnet") => Network::Testnet,
  85                 Some("regtest") => Network::Regtest,
  86                 Some(_) => panic!("Unsupported network provided. Options are: `regtest`, `testnet`"),
  87                 None => Network::Testnet,
  88         };
  89
  90         let ldk_announced_listen_addr = match env::args().skip(arg_idx + 1).next().as_ref() {
  91                 Some(s) => match IpAddr::from_str(s) {
  92                         Ok(IpAddr::V4(a)) => {
  93                                 Some(NetAddress::IPv4 { addr: a.octets(), port: ldk_peer_listening_port })
  94                         }
  95                         Ok(IpAddr::V6(a)) => {
  96                                 Some(NetAddress::IPv6 { addr: a.octets(), port: ldk_peer_listening_port })
  97                         }
  98                         Err(_) => panic!("Failed to parse announced-listen-addr into an IP address"),
  99                 },
 100                 None => None,
 101         };
 102
 103         let ldk_announced_node_name = match env::args().skip(arg_idx + 2).next().as_ref() {
 104                 Some(s) => {
 105                         if s.len() > 32 {
 106                                 panic!("Node Alias can not be longer than 32 bytes");
 107                         }
 108                         let mut bytes = [0; 32];
 109                         bytes[..s.len()].copy_from_slice(s.as_bytes());
 110                         bytes
 111                 }
 112                 None => [0; 32],
 113         };
 114
 115         Ok(LdkUserInfo {
 116                 bitcoind_rpc_username,
 117                 bitcoind_rpc_password,
 118                 bitcoind_rpc_host,
 119                 bitcoind_rpc_port,
 120                 ldk_storage_dir_path,
 121                 ldk_peer_listening_port,
 122                 ldk_announced_listen_addr,
 123                 ldk_announced_node_name,
 124                 network,
 125         })
 126 }
 127
 128 pub(crate) async fn poll_for_user_input(
 129         peer_manager: Arc<PeerManager>, channel_manager: Arc<ChannelManager>,
 130         keys_manager: Arc<KeysManager>,
 131         router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access + Send + Sync>, Arc<FilesystemLogger>>>,
 132         inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage,
 133         ldk_data_dir: String, logger: Arc<FilesystemLogger>, network: Network,
 134 ) {
 135         println!("LDK startup successful. To view available commands: \"help\".");
 136         println!("LDK logs are available at <your-supplied-ldk-data-dir-path>/.ldk/logs");
 137         println!("Local Node ID is {}.", channel_manager.get_our_node_id());
 138         let stdin = io::stdin();
 139         print!("> ");
 140         io::stdout().flush().unwrap(); // Without flushing, the `>` doesn't print
 141         for line in stdin.lock().lines() {
 142                 let line = line.unwrap();
 143                 let mut words = line.split_whitespace();
 144                 if let Some(word) = words.next() {
 145                         match word {
 146                                 "help" => help(),
 147                                 "openchannel" => {
 148                                         let peer_pubkey_and_ip_addr = words.next();
 149                                         let channel_value_sat = words.next();
 150                                         if peer_pubkey_and_ip_addr.is_none() || channel_value_sat.is_none() {
 151                                                 println!("ERROR: openchannel has 2 required arguments: `openchannel pubkey@host:port channel_amt_satoshis` [--public]");
 152                                                 print!("> ");
 153                                                 io::stdout().flush().unwrap();
 154                                                 continue;
 155                                         }
 156                                         let peer_pubkey_and_ip_addr = peer_pubkey_and_ip_addr.unwrap();
 157                                         let (pubkey, peer_addr) =
 158                                                 match parse_peer_info(peer_pubkey_and_ip_addr.to_string()) {
 159                                                         Ok(info) => info,
 160                                                         Err(e) => {
 161                                                                 println!("{:?}", e.into_inner().unwrap());
 162                                                                 print!("> ");
 163                                                                 io::stdout().flush().unwrap();
 164                                                                 continue;
 165                                                         }
 166                                                 };
 167
 168                                         let chan_amt_sat: Result<u64, _> = channel_value_sat.unwrap().parse();
 169                                         if chan_amt_sat.is_err() {
 170                                                 println!("ERROR: channel amount must be a number");
 171                                                 print!("> ");
 172                                                 io::stdout().flush().unwrap();
 173                                                 continue;
 174                                         }
 175
 176                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 177                                                 .await
 178                                                 .is_err()
 179                                         {
 180                                                 print!("> ");
 181                                                 io::stdout().flush().unwrap();
 182                                                 continue;
 183                                         };
 184
 185                                         let announce_channel = match words.next() {
 186                                                 Some("--public") | Some("--public=true") => true,
 187                                                 Some("--public=false") => false,
 188                                                 Some(_) => {
 189                                                         println!("ERROR: invalid `--public` command format. Valid formats: `--public`, `--public=true` `--public=false`");
 190                                                         print!("> ");
 191                                                         io::stdout().flush().unwrap();
 192                                                         continue;
 193                                                 }
 194                                                 None => false,
 195                                         };
 196
 197                                         if open_channel(
 198                                                 pubkey,
 199                                                 chan_amt_sat.unwrap(),
 200                                                 announce_channel,
 201                                                 channel_manager.clone(),
 202                                         )
 203                                         .is_ok()
 204                                         {
 205                                                 let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
 206                                                 let _ = disk::persist_channel_peer(
 207                                                         Path::new(&peer_data_path),
 208                                                         peer_pubkey_and_ip_addr,
 209                                                 );
 210                                         }
 211                                 }
 212                                 "sendpayment" => {
 213                                         let invoice_str = words.next();
 214                                         if invoice_str.is_none() {
 215                                                 println!("ERROR: sendpayment requires an invoice: `sendpayment <invoice>`");
 216                                                 print!("> ");
 217                                                 io::stdout().flush().unwrap();
 218                                                 continue;
 219                                         }
 220
 221                                         let invoice = match Invoice::from_str(invoice_str.unwrap()) {
 222                                                 Ok(inv) => inv,
 223                                                 Err(e) => {
 224                                                         println!("ERROR: invalid invoice: {:?}", e);
 225                                                         print!("> ");
 226                                                         io::stdout().flush().unwrap();
 227                                                         continue;
 228                                                 }
 229                                         };
 230                                         let last_hops = invoice.route_hints();
 231
 232                                         let amt_pico_btc = invoice.amount_pico_btc();
 233                                         if amt_pico_btc.is_none() {
 234                                                 println!("ERROR: invalid invoice: must contain amount to pay");
 235                                                 print!("> ");
 236                                                 io::stdout().flush().unwrap();
 237                                                 continue;
 238                                         }
 239                                         let amt_msat = amt_pico_btc.unwrap() / 10;
 240
 241                                         let payee_pubkey = invoice.recover_payee_pub_key();
 242                                         let final_cltv = invoice.min_final_cltv_expiry() as u32;
 243
 244                                         let mut payment_hash = PaymentHash([0; 32]);
 245                                         payment_hash.0.copy_from_slice(&invoice.payment_hash().as_ref()[0..32]);
 246
 247                                         let payment_secret = match invoice.payment_secret() {
 248                                                 Some(secret) => {
 249                                                         let mut payment_secret = PaymentSecret([0; 32]);
 250                                                         payment_secret.0.copy_from_slice(&secret.0);
 251                                                         Some(payment_secret)
 252                                                 }
 253                                                 None => None,
 254                                         };
 255
 256                                         let invoice_features = match invoice.features() {
 257                                                 Some(feat) => Some(feat.clone()),
 258                                                 None => None,
 259                                         };
 260
 261                                         send_payment(
 262                                                 payee_pubkey,
 263                                                 amt_msat,
 264                                                 final_cltv,
 265                                                 payment_hash,
 266                                                 payment_secret,
 267                                                 invoice_features,
 268                                                 last_hops,
 269                                                 router.clone(),
 270                                                 channel_manager.clone(),
 271                                                 outbound_payments.clone(),
 272                                                 logger.clone(),
 273                                         );
 274                                 }
 275                                 "getinvoice" => {
 276                                         let amt_str = words.next();
 277                                         if amt_str.is_none() {
 278                                                 println!("ERROR: getinvoice requires an amount in millisatoshis");
 279                                                 print!("> ");
 280                                                 io::stdout().flush().unwrap();
 281                                                 continue;
 282                                         }
 283
 284                                         let amt_msat: Result<u64, _> = amt_str.unwrap().parse();
 285                                         if amt_msat.is_err() {
 286                                                 println!("ERROR: getinvoice provided payment amount was not a number");
 287                                                 print!("> ");
 288                                                 io::stdout().flush().unwrap();
 289                                                 continue;
 290                                         }
 291                                         get_invoice(
 292                                                 amt_msat.unwrap(),
 293                                                 inbound_payments.clone(),
 294                                                 channel_manager.clone(),
 295                                                 keys_manager.clone(),
 296                                                 network,
 297                                         );
 298                                 }
 299                                 "connectpeer" => {
 300                                         let peer_pubkey_and_ip_addr = words.next();
 301                                         if peer_pubkey_and_ip_addr.is_none() {
 302                                                 println!("ERROR: connectpeer requires peer connection info: `connectpeer pubkey@host:port`");
 303                                                 print!("> ");
 304                                                 io::stdout().flush().unwrap();
 305                                                 continue;
 306                                         }
 307                                         let (pubkey, peer_addr) =
 308                                                 match parse_peer_info(peer_pubkey_and_ip_addr.unwrap().to_string()) {
 309                                                         Ok(info) => info,
 310                                                         Err(e) => {
 311                                                                 println!("{:?}", e.into_inner().unwrap());
 312                                                                 print!("> ");
 313                                                                 io::stdout().flush().unwrap();
 314                                                                 continue;
 315                                                         }
 316                                                 };
 317                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 318                                                 .await
 319                                                 .is_ok()
 320                                         {
 321                                                 println!("SUCCESS: connected to peer {}", pubkey);
 322                                         }
 323                                 }
 324                                 "listchannels" => list_channels(channel_manager.clone()),
 325                                 "listpayments" => {
 326                                         list_payments(inbound_payments.clone(), outbound_payments.clone())
 327                                 }
 328                                 "closechannel" => {
 329                                         let channel_id_str = words.next();
 330                                         if channel_id_str.is_none() {
 331                                                 println!("ERROR: closechannel requires a channel ID: `closechannel <channel_id>`");
 332                                                 print!("> ");
 333                                                 io::stdout().flush().unwrap();
 334                                                 continue;
 335                                         }
 336                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 337                                         if channel_id_vec.is_none() {
 338                                                 println!("ERROR: couldn't parse channel_id as hex");
 339                                                 print!("> ");
 340                                                 io::stdout().flush().unwrap();
 341                                                 continue;
 342                                         }
 343                                         let mut channel_id = [0; 32];
 344                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 345                                         close_channel(channel_id, channel_manager.clone());
 346                                 }
 347                                 "forceclosechannel" => {
 348                                         let channel_id_str = words.next();
 349                                         if channel_id_str.is_none() {
 350                                                 println!("ERROR: forceclosechannel requires a channel ID: `forceclosechannel <channel_id>`");
 351                                                 print!("> ");
 352                                                 io::stdout().flush().unwrap();
 353                                                 continue;
 354                                         }
 355                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 356                                         if channel_id_vec.is_none() {
 357                                                 println!("ERROR: couldn't parse channel_id as hex");
 358                                                 print!("> ");
 359                                                 io::stdout().flush().unwrap();
 360                                                 continue;
 361                                         }
 362                                         let mut channel_id = [0; 32];
 363                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 364                                         force_close_channel(channel_id, channel_manager.clone());
 365                                 }
 366                                 "nodeinfo" => node_info(channel_manager.clone(), peer_manager.clone()),
 367                                 "listpeers" => list_peers(peer_manager.clone()),
 368                                 _ => println!("Unknown command. See `\"help\" for available commands."),
 369                         }
 370                 }
 371                 print!("> ");
 372                 io::stdout().flush().unwrap();
 373         }
 374 }
 375
 376 fn help() {
 377         println!("openchannel pubkey@host:port <amt_satoshis>");
 378         println!("sendpayment <invoice>");
 379         println!("getinvoice <amt_millisatoshis>");
 380         println!("connectpeer pubkey@host:port");
 381         println!("listchannels");
 382         println!("listpayments");
 383         println!("closechannel <channel_id>");
 384         println!("forceclosechannel <channel_id>");
 385         println!("nodeinfo");
 386         println!("listpeers");
 387 }
 388
 389 fn node_info(channel_manager: Arc<ChannelManager>, peer_manager: Arc<PeerManager>) {
 390         println!("\t{{");
 391         println!("\t\t node_pubkey: {}", channel_manager.get_our_node_id());
 392         println!("\t\t num_channels: {}", channel_manager.list_channels().len());
 393         println!("\t\t num_usable_channels: {}", channel_manager.list_usable_channels().len());
 394         println!("\t\t num_peers: {}", peer_manager.get_peer_node_ids().len());
 395         println!("\t}},");
 396 }
 397
 398 fn list_peers(peer_manager: Arc<PeerManager>) {
 399         println!("\t{{");
 400         for pubkey in peer_manager.get_peer_node_ids() {
 401                 println!("\t\t pubkey: {}", pubkey);
 402         }
 403         println!("\t}},");
 404 }
 405
 406 fn list_channels(channel_manager: Arc<ChannelManager>) {
 407         print!("[");
 408         for chan_info in channel_manager.list_channels() {
 409                 println!("");
 410                 println!("\t{{");
 411                 println!("\t\tchannel_id: {},", hex_utils::hex_str(&chan_info.channel_id[..]));
 412                 if let Some(funding_txo) = chan_info.funding_txo {
 413                         println!("\t\tfunding_txid: {},", funding_txo.txid);
 414                 }
 415                 println!(
 416                         "\t\tpeer_pubkey: {},",
 417                         hex_utils::hex_str(&chan_info.remote_network_id.serialize())
 418                 );
 419                 if let Some(id) = chan_info.short_channel_id {
 420                         println!("\t\tshort_channel_id: {},", id);
 421                 }
 422                 println!("\t\tis_confirmed_onchain: {},", chan_info.is_funding_locked);
 423                 println!("\t\tchannel_value_satoshis: {},", chan_info.channel_value_satoshis);
 424                 if chan_info.is_usable {
 425                         println!("\t\tavailable_balance_for_send_msat: {},", chan_info.outbound_capacity_msat);
 426                         println!("\t\tavailable_balance_for_recv_msat: {},", chan_info.inbound_capacity_msat);
 427                 }
 428                 println!("\t\tchannel_can_send_payments: {},", chan_info.is_usable);
 429                 println!("\t\tpublic: {},", chan_info.is_public);
 430                 println!("\t}},");
 431         }
 432         println!("]");
 433 }
 434
 435 fn list_payments(inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage) {
 436         let inbound = inbound_payments.lock().unwrap();
 437         let outbound = outbound_payments.lock().unwrap();
 438         print!("[");
 439         for (payment_hash, payment_info) in inbound.deref() {
 440                 println!("");
 441                 println!("\t{{");
 442                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 443                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 444                 println!("\t\thtlc_direction: inbound,");
 445                 println!(
 446                         "\t\thtlc_status: {},",
 447                         match payment_info.status {
 448                                 HTLCStatus::Pending => "pending",
 449                                 HTLCStatus::Succeeded => "succeeded",
 450                                 HTLCStatus::Failed => "failed",
 451                         }
 452                 );
 453
 454                 println!("\t}},");
 455         }
 456
 457         for (payment_hash, payment_info) in outbound.deref() {
 458                 println!("");
 459                 println!("\t{{");
 460                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 461                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 462                 println!("\t\thtlc_direction: outbound,");
 463                 println!(
 464                         "\t\thtlc_status: {},",
 465                         match payment_info.status {
 466                                 HTLCStatus::Pending => "pending",
 467                                 HTLCStatus::Succeeded => "succeeded",
 468                                 HTLCStatus::Failed => "failed",
 469                         }
 470                 );
 471
 472                 println!("\t}},");
 473         }
 474         println!("]");
 475 }
 476
 477 pub(crate) async fn connect_peer_if_necessary(
 478         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 479 ) -> Result<(), ()> {
 480         for node_pubkey in peer_manager.get_peer_node_ids() {
 481                 if node_pubkey == pubkey {
 482                         return Ok(());
 483                 }
 484         }
 485         match lightning_net_tokio::connect_outbound(Arc::clone(&peer_manager), pubkey, peer_addr).await
 486         {
 487                 Some(conn_closed_fut) => {
 488                         let mut closed_fut_box = Box::pin(conn_closed_fut);
 489                         let mut peer_connected = false;
 490                         while !peer_connected {
 491                                 match futures::poll!(&mut closed_fut_box) {
 492                                         std::task::Poll::Ready(_) => {
 493                                                 println!("ERROR: Peer disconnected before we finished the handshake");
 494                                                 return Err(());
 495                                         }
 496                                         std::task::Poll::Pending => {}
 497                                 }
 498                                 for node_pubkey in peer_manager.get_peer_node_ids() {
 499                                         if node_pubkey == pubkey {
 500                                                 peer_connected = true;
 501                                         }
 502                                 }
 503                                 // Avoid blocking the tokio context by sleeping a bit
 504                                 tokio::time::sleep(Duration::from_millis(10)).await;
 505                         }
 506                 }
 507                 None => {
 508                         println!("ERROR: failed to connect to peer");
 509                         return Err(());
 510                 }
 511         }
 512         Ok(())
 513 }
 514
 515 fn open_channel(
 516         peer_pubkey: PublicKey, channel_amt_sat: u64, announced_channel: bool,
 517         channel_manager: Arc<ChannelManager>,
 518 ) -> Result<(), ()> {
 519         let config = UserConfig {
 520                 peer_channel_config_limits: ChannelHandshakeLimits {
 521                         // lnd's max to_self_delay is 2016, so we want to be compatible.
 522                         their_to_self_delay: 2016,
 523                         ..Default::default()
 524                 },
 525                 channel_options: ChannelConfig { announced_channel, ..Default::default() },
 526                 ..Default::default()
 527         };
 528
 529         match channel_manager.create_channel(peer_pubkey, channel_amt_sat, 0, 0, Some(config)) {
 530                 Ok(_) => {
 531                         println!("EVENT: initiated channel with peer {}. ", peer_pubkey);
 532                         return Ok(());
 533                 }
 534                 Err(e) => {
 535                         println!("ERROR: failed to open channel: {:?}", e);
 536                         return Err(());
 537                 }
 538         }
 539 }
 540
 541 fn send_payment(
 542         payee: PublicKey, amt_msat: u64, final_cltv: u32, payment_hash: PaymentHash,
 543         payment_secret: Option<PaymentSecret>, payee_features: Option<InvoiceFeatures>,
 544         route_hints: Vec<&RouteHint>,
 545         router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access + Send + Sync>, Arc<FilesystemLogger>>>,
 546         channel_manager: Arc<ChannelManager>, payment_storage: PaymentInfoStorage,
 547         logger: Arc<FilesystemLogger>,
 548 ) {
 549         let network_graph = router.network_graph.read().unwrap();
 550         let first_hops = channel_manager.list_usable_channels();
 551         let payer_pubkey = channel_manager.get_our_node_id();
 552
 553         let route = router::get_route(
 554                 &payer_pubkey,
 555                 &network_graph,
 556                 &payee,
 557                 payee_features,
 558                 Some(&first_hops.iter().collect::<Vec<_>>()),
 559                 &route_hints,
 560                 amt_msat,
 561                 final_cltv,
 562                 logger,
 563         );
 564         if let Err(e) = route {
 565                 println!("ERROR: failed to find route: {}", e.err);
 566                 return;
 567         }
 568         let status = match channel_manager.send_payment(&route.unwrap(), payment_hash, &payment_secret)
 569         {
 570                 Ok(()) => {
 571                         println!("EVENT: initiated sending {} msats to {}", amt_msat, payee);
 572                         HTLCStatus::Pending
 573                 }
 574                 Err(e) => {
 575                         println!("ERROR: failed to send payment: {:?}", e);
 576                         HTLCStatus::Failed
 577                 }
 578         };
 579         let mut payments = payment_storage.lock().unwrap();
 580         payments.insert(
 581                 payment_hash,
 582                 PaymentInfo {
 583                         preimage: None,
 584                         secret: payment_secret,
 585                         status,
 586                         amt_msat: MillisatAmount(Some(amt_msat)),
 587                 },
 588         );
 589 }
 590
 591 fn get_invoice(
 592         amt_msat: u64, payment_storage: PaymentInfoStorage, channel_manager: Arc<ChannelManager>,
 593         keys_manager: Arc<KeysManager>, network: Network,
 594 ) {
 595         let mut payments = payment_storage.lock().unwrap();
 596         let currency = match network {
 597                 Network::Bitcoin => Currency::Bitcoin,
 598                 Network::Testnet => Currency::BitcoinTestnet,
 599                 Network::Regtest => Currency::Regtest,
 600                 Network::Signet => panic!("Signet unsupported"),
 601         };
 602         let invoice = match utils::create_invoice_from_channelmanager(
 603                 &channel_manager,
 604                 keys_manager,
 605                 currency,
 606                 Some(amt_msat),
 607                 "ldk-tutorial-node".to_string(),
 608         ) {
 609                 Ok(inv) => {
 610                         println!("SUCCESS: generated invoice: {}", inv);
 611                         inv
 612                 }
 613                 Err(e) => {
 614                         println!("ERROR: failed to create invoice: {:?}", e);
 615                         return;
 616                 }
 617         };
 618
 619         let mut payment_hash = PaymentHash([0; 32]);
 620         payment_hash.0.copy_from_slice(&invoice.payment_hash().as_ref()[0..32]);
 621         payments.insert(
 622                 payment_hash,
 623                 PaymentInfo {
 624                         preimage: None,
 625                         // We can't add payment secrets to invoices until we support features in invoices.
 626                         // Otherwise lnd errors with "destination hop doesn't understand payment addresses"
 627                         // (for context, lnd calls payment secrets "payment addresses").
 628                         secret: Some(invoice.payment_secret().unwrap().clone()),
 629                         status: HTLCStatus::Pending,
 630                         amt_msat: MillisatAmount(Some(amt_msat)),
 631                 },
 632         );
 633 }
 634
 635 fn close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 636         match channel_manager.close_channel(&channel_id) {
 637                 Ok(()) => println!("EVENT: initiating channel close"),
 638                 Err(e) => println!("ERROR: failed to close channel: {:?}", e),
 639         }
 640 }
 641
 642 fn force_close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 643         match channel_manager.force_close_channel(&channel_id) {
 644                 Ok(()) => println!("EVENT: initiating channel force-close"),
 645                 Err(e) => println!("ERROR: failed to force-close channel: {:?}", e),
 646         }
 647 }
 648
 649 pub(crate) fn parse_peer_info(
 650         peer_pubkey_and_ip_addr: String,
 651 ) -> Result<(PublicKey, SocketAddr), std::io::Error> {
 652         let mut pubkey_and_addr = peer_pubkey_and_ip_addr.split("@");
 653         let pubkey = pubkey_and_addr.next();
 654         let peer_addr_str = pubkey_and_addr.next();
 655         if peer_addr_str.is_none() || peer_addr_str.is_none() {
 656                 return Err(std::io::Error::new(
 657                         std::io::ErrorKind::Other,
 658                         "ERROR: incorrectly formatted peer info. Should be formatted as: `pubkey@host:port`",
 659                 ));
 660         }
 661
 662         let peer_addr = peer_addr_str.unwrap().to_socket_addrs().map(|mut r| r.next());
 663         if peer_addr.is_err() || peer_addr.as_ref().unwrap().is_none() {
 664                 return Err(std::io::Error::new(
 665                         std::io::ErrorKind::Other,
 666                         "ERROR: couldn't parse pubkey@host:port into a socket address",
 667                 ));
 668         }
 669
 670         let pubkey = hex_utils::to_compressed_pubkey(pubkey.unwrap());
 671         if pubkey.is_none() {
 672                 return Err(std::io::Error::new(
 673                         std::io::ErrorKind::Other,
 674                         "ERROR: unable to parse given pubkey for node",
 675                 ));
 676         }
 677
 678         Ok((pubkey.unwrap(), peer_addr.unwrap().unwrap()))
 679 }