_ 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,
   5         PaymentInfoStorage, PeerManager,
   6 };
   7 use bitcoin::hashes::sha256::Hash as Sha256Hash;
   8 use bitcoin::hashes::Hash;
   9 use bitcoin::network::constants::Network;
  10 use bitcoin::secp256k1::key::{PublicKey, SecretKey};
  11 use bitcoin::secp256k1::Secp256k1;
  12 use lightning::chain;
  13 use lightning::ln::channelmanager::{PaymentHash, PaymentPreimage, PaymentSecret};
  14 use lightning::ln::features::InvoiceFeatures;
  15 use lightning::routing::network_graph::{NetGraphMsgHandler, RoutingFees};
  16 use lightning::routing::router;
  17 use lightning::routing::router::RouteHint;
  18 use lightning::util::config::UserConfig;
  19 use rand;
  20 use rand::Rng;
  21 use std::env;
  22 use std::io;
  23 use std::io::{BufRead, Write};
  24 use std::net::{SocketAddr, TcpStream};
  25 use std::ops::Deref;
  26 use std::path::Path;
  27 use std::str::FromStr;
  28 use std::sync::Arc;
  29 use std::time::Duration;
  30 use tokio::sync::mpsc;
  31
  32 pub(crate) struct LdkUserInfo {
  33         pub(crate) bitcoind_rpc_username: String,
  34         pub(crate) bitcoind_rpc_password: String,
  35         pub(crate) bitcoind_rpc_port: u16,
  36         pub(crate) bitcoind_rpc_host: String,
  37         pub(crate) ldk_storage_dir_path: String,
  38         pub(crate) ldk_peer_listening_port: u16,
  39         pub(crate) network: Network,
  40 }
  41
  42 pub(crate) fn parse_startup_args() -> Result<LdkUserInfo, ()> {
  43         if env::args().len() < 4 {
  44                 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]`");
  45                 return Err(());
  46         }
  47         let bitcoind_rpc_info = env::args().skip(1).next().unwrap();
  48         let bitcoind_rpc_info_parts: Vec<&str> = bitcoind_rpc_info.split("@").collect();
  49         if bitcoind_rpc_info_parts.len() != 2 {
  50                 println!("ERROR: bad bitcoind RPC URL provided");
  51                 return Err(());
  52         }
  53         let rpc_user_and_password: Vec<&str> = bitcoind_rpc_info_parts[0].split(":").collect();
  54         if rpc_user_and_password.len() != 2 {
  55                 println!("ERROR: bad bitcoind RPC username/password combo provided");
  56                 return Err(());
  57         }
  58         let bitcoind_rpc_username = rpc_user_and_password[0].to_string();
  59         let bitcoind_rpc_password = rpc_user_and_password[1].to_string();
  60         let bitcoind_rpc_path: Vec<&str> = bitcoind_rpc_info_parts[1].split(":").collect();
  61         if bitcoind_rpc_path.len() != 2 {
  62                 println!("ERROR: bad bitcoind RPC path provided");
  63                 return Err(());
  64         }
  65         let bitcoind_rpc_host = bitcoind_rpc_path[0].to_string();
  66         let bitcoind_rpc_port = bitcoind_rpc_path[1].parse::<u16>().unwrap();
  67
  68         let ldk_storage_dir_path = env::args().skip(2).next().unwrap();
  69
  70         let mut ldk_peer_port_set = true;
  71         let ldk_peer_listening_port: u16 = match env::args().skip(3).next().map(|p| p.parse()) {
  72                 Some(Ok(p)) => p,
  73                 Some(Err(e)) => panic!(e),
  74                 None => {
  75                         ldk_peer_port_set = false;
  76                         9735
  77                 }
  78         };
  79
  80         let arg_idx = match ldk_peer_port_set {
  81                 true => 4,
  82                 false => 3,
  83         };
  84         let network: Network = match env::args().skip(arg_idx).next().as_ref().map(String::as_str) {
  85                 Some("testnet") => Network::Testnet,
  86                 Some("regtest") => Network::Regtest,
  87                 Some(_) => panic!("Unsupported network provided. Options are: `regtest`, `testnet`"),
  88                 None => Network::Testnet,
  89         };
  90         Ok(LdkUserInfo {
  91                 bitcoind_rpc_username,
  92                 bitcoind_rpc_password,
  93                 bitcoind_rpc_host,
  94                 bitcoind_rpc_port,
  95                 ldk_storage_dir_path,
  96                 ldk_peer_listening_port,
  97                 network,
  98         })
  99 }
 100
 101 pub(crate) async fn poll_for_user_input(
 102         peer_manager: Arc<PeerManager>, channel_manager: Arc<ChannelManager>,
 103         router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access>, Arc<FilesystemLogger>>>,
 104         payment_storage: PaymentInfoStorage, node_privkey: SecretKey, event_notifier: mpsc::Sender<()>,
 105         ldk_data_dir: String, logger: Arc<FilesystemLogger>, network: Network,
 106 ) {
 107         println!("LDK startup successful. To view available commands: \"help\".\nLDK logs are available at <your-supplied-ldk-data-dir-path>/.ldk/logs");
 108         let stdin = io::stdin();
 109         print!("> ");
 110         io::stdout().flush().unwrap(); // Without flushing, the `>` doesn't print
 111         for line in stdin.lock().lines() {
 112                 let _ = event_notifier.try_send(());
 113                 let line = line.unwrap();
 114                 let mut words = line.split_whitespace();
 115                 if let Some(word) = words.next() {
 116                         match word {
 117                                 "help" => help(),
 118                                 "openchannel" => {
 119                                         let peer_pubkey_and_ip_addr = words.next();
 120                                         let channel_value_sat = words.next();
 121                                         if peer_pubkey_and_ip_addr.is_none() || channel_value_sat.is_none() {
 122                                                 println!("ERROR: openchannel has 2 required arguments: `openchannel pubkey@host:port channel_amt_satoshis` [--public]");
 123                                                 print!("> ");
 124                                                 io::stdout().flush().unwrap();
 125                                                 continue;
 126                                         }
 127                                         let peer_pubkey_and_ip_addr = peer_pubkey_and_ip_addr.unwrap();
 128                                         let (pubkey, peer_addr) =
 129                                                 match parse_peer_info(peer_pubkey_and_ip_addr.to_string()) {
 130                                                         Ok(info) => info,
 131                                                         Err(e) => {
 132                                                                 println!("{:?}", e.into_inner().unwrap());
 133                                                                 print!("> ");
 134                                                                 io::stdout().flush().unwrap();
 135                                                                 continue;
 136                                                         }
 137                                                 };
 138
 139                                         let chan_amt_sat: Result<u64, _> = channel_value_sat.unwrap().parse();
 140                                         if chan_amt_sat.is_err() {
 141                                                 println!("ERROR: channel amount must be a number");
 142                                                 print!("> ");
 143                                                 io::stdout().flush().unwrap();
 144                                                 continue;
 145                                         }
 146
 147                                         if connect_peer_if_necessary(
 148                                                 pubkey,
 149                                                 peer_addr,
 150                                                 peer_manager.clone(),
 151                                                 event_notifier.clone(),
 152                                         )
 153                                         .is_err()
 154                                         {
 155                                                 print!("> ");
 156                                                 io::stdout().flush().unwrap();
 157                                                 continue;
 158                                         };
 159
 160                                         let announce_channel = match words.next() {
 161                                                 Some("--public") | Some("--public=true") => true,
 162                                                 Some("--public=false") => false,
 163                                                 Some(_) => {
 164                                                         println!("ERROR: invalid `--public` command format. Valid formats: `--public`, `--public=true` `--public=false`");
 165                                                         print!("> ");
 166                                                         io::stdout().flush().unwrap();
 167                                                         continue;
 168                                                 }
 169                                                 None => false,
 170                                         };
 171
 172                                         if open_channel(
 173                                                 pubkey,
 174                                                 chan_amt_sat.unwrap(),
 175                                                 announce_channel,
 176                                                 channel_manager.clone(),
 177                                         )
 178                                         .is_ok()
 179                                         {
 180                                                 let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
 181                                                 let _ = disk::persist_channel_peer(
 182                                                         Path::new(&peer_data_path),
 183                                                         peer_pubkey_and_ip_addr,
 184                                                 );
 185                                         }
 186                                 }
 187                                 "sendpayment" => {
 188                                         let invoice_str = words.next();
 189                                         if invoice_str.is_none() {
 190                                                 println!("ERROR: sendpayment requires an invoice: `sendpayment <invoice>`");
 191                                                 print!("> ");
 192                                                 io::stdout().flush().unwrap();
 193                                                 continue;
 194                                         }
 195
 196                                         let invoice_res = lightning_invoice::Invoice::from_str(invoice_str.unwrap());
 197                                         if invoice_res.is_err() {
 198                                                 println!("ERROR: invalid invoice: {:?}", invoice_res.unwrap_err());
 199                                                 print!("> ");
 200                                                 io::stdout().flush().unwrap();
 201                                                 continue;
 202                                         }
 203                                         let invoice = invoice_res.unwrap();
 204                                         let route_hints: Vec<lightning_invoice::Route> =
 205                                                 invoice.routes().iter().map(|&route| route.clone()).collect();
 206
 207                                         let amt_pico_btc = invoice.amount_pico_btc();
 208                                         if amt_pico_btc.is_none() {
 209                                                 println!("ERROR: invalid invoice: must contain amount to pay");
 210                                                 print!("> ");
 211                                                 io::stdout().flush().unwrap();
 212                                                 continue;
 213                                         }
 214                                         let amt_msat = amt_pico_btc.unwrap() / 10;
 215
 216                                         let payee_pubkey = invoice.recover_payee_pub_key();
 217                                         let final_cltv = *invoice.min_final_cltv_expiry().unwrap_or(&9) as u32;
 218
 219                                         let mut payment_hash = PaymentHash([0; 32]);
 220                                         payment_hash.0.copy_from_slice(&invoice.payment_hash().as_ref()[0..32]);
 221
 222                                         let payment_secret = match invoice.payment_secret() {
 223                                                 Some(secret) => {
 224                                                         let mut payment_secret = PaymentSecret([0; 32]);
 225                                                         payment_secret.0.copy_from_slice(&secret.0);
 226                                                         Some(payment_secret)
 227                                                 }
 228                                                 None => None,
 229                                         };
 230
 231                                         // rust-lightning-invoice doesn't currently support features, so we parse features
 232                                         // manually from the invoice.
 233                                         let mut invoice_features = InvoiceFeatures::empty();
 234                                         for field in &invoice.into_signed_raw().raw_invoice().data.tagged_fields {
 235                                                 match field {
 236                                                         lightning_invoice::RawTaggedField::UnknownSemantics(vec) => {
 237                                                                 if vec[0] == bech32::u5::try_from_u8(5).unwrap() {
 238                                                                         if vec.len() >= 6 && vec[5].to_u8() & 0b10000 != 0 {
 239                                                                                 invoice_features =
 240                                                                                         invoice_features.set_variable_length_onion_optional();
 241                                                                         }
 242                                                                         if vec.len() >= 6 && vec[5].to_u8() & 0b01000 != 0 {
 243                                                                                 invoice_features =
 244                                                                                         invoice_features.set_variable_length_onion_required();
 245                                                                         }
 246                                                                         if vec.len() >= 4 && vec[3].to_u8() & 0b00001 != 0 {
 247                                                                                 invoice_features =
 248                                                                                         invoice_features.set_payment_secret_optional();
 249                                                                         }
 250                                                                         if vec.len() >= 5 && vec[4].to_u8() & 0b10000 != 0 {
 251                                                                                 invoice_features =
 252                                                                                         invoice_features.set_payment_secret_required();
 253                                                                         }
 254                                                                         if vec.len() >= 4 && vec[3].to_u8() & 0b00100 != 0 {
 255                                                                                 invoice_features =
 256                                                                                         invoice_features.set_basic_mpp_optional();
 257                                                                         }
 258                                                                         if vec.len() >= 4 && vec[3].to_u8() & 0b00010 != 0 {
 259                                                                                 invoice_features =
 260                                                                                         invoice_features.set_basic_mpp_required();
 261                                                                         }
 262                                                                 }
 263                                                         }
 264                                                         _ => {}
 265                                                 }
 266                                         }
 267                                         let invoice_features_opt = match invoice_features == InvoiceFeatures::empty() {
 268                                                 true => None,
 269                                                 false => Some(invoice_features),
 270                                         };
 271                                         send_payment(
 272                                                 payee_pubkey,
 273                                                 amt_msat,
 274                                                 final_cltv,
 275                                                 payment_hash,
 276                                                 payment_secret,
 277                                                 invoice_features_opt,
 278                                                 route_hints,
 279                                                 router.clone(),
 280                                                 channel_manager.clone(),
 281                                                 payment_storage.clone(),
 282                                                 logger.clone(),
 283                                         );
 284                                 }
 285                                 "getinvoice" => {
 286                                         let amt_str = words.next();
 287                                         if amt_str.is_none() {
 288                                                 println!("ERROR: getinvoice requires an amount in millisatoshis");
 289                                                 print!("> ");
 290                                                 io::stdout().flush().unwrap();
 291                                                 continue;
 292                                         }
 293
 294                                         let amt_msat: Result<u64, _> = amt_str.unwrap().parse();
 295                                         if amt_msat.is_err() {
 296                                                 println!("ERROR: getinvoice provided payment amount was not a number");
 297                                                 print!("> ");
 298                                                 io::stdout().flush().unwrap();
 299                                                 continue;
 300                                         }
 301                                         get_invoice(
 302                                                 amt_msat.unwrap(),
 303                                                 payment_storage.clone(),
 304                                                 node_privkey.clone(),
 305                                                 channel_manager.clone(),
 306                                                 network,
 307                                         );
 308                                 }
 309                                 "connectpeer" => {
 310                                         let peer_pubkey_and_ip_addr = words.next();
 311                                         if peer_pubkey_and_ip_addr.is_none() {
 312                                                 println!("ERROR: connectpeer requires peer connection info: `connectpeer pubkey@host:port`");
 313                                                 print!("> ");
 314                                                 io::stdout().flush().unwrap();
 315                                                 continue;
 316                                         }
 317                                         let (pubkey, peer_addr) =
 318                                                 match parse_peer_info(peer_pubkey_and_ip_addr.unwrap().to_string()) {
 319                                                         Ok(info) => info,
 320                                                         Err(e) => {
 321                                                                 println!("{:?}", e.into_inner().unwrap());
 322                                                                 print!("> ");
 323                                                                 io::stdout().flush().unwrap();
 324                                                                 continue;
 325                                                         }
 326                                                 };
 327                                         if connect_peer_if_necessary(
 328                                                 pubkey,
 329                                                 peer_addr,
 330                                                 peer_manager.clone(),
 331                                                 event_notifier.clone(),
 332                                         )
 333                                         .is_ok()
 334                                         {
 335                                                 println!("SUCCESS: connected to peer {}", pubkey);
 336                                         }
 337                                 }
 338                                 "listchannels" => list_channels(channel_manager.clone()),
 339                                 "listpayments" => list_payments(payment_storage.clone()),
 340                                 "closechannel" => {
 341                                         let channel_id_str = words.next();
 342                                         if channel_id_str.is_none() {
 343                                                 println!("ERROR: closechannel requires a channel ID: `closechannel <channel_id>`");
 344                                                 print!("> ");
 345                                                 io::stdout().flush().unwrap();
 346                                                 continue;
 347                                         }
 348                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 349                                         if channel_id_vec.is_none() {
 350                                                 println!("ERROR: couldn't parse channel_id as hex");
 351                                                 print!("> ");
 352                                                 io::stdout().flush().unwrap();
 353                                                 continue;
 354                                         }
 355                                         let mut channel_id = [0; 32];
 356                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 357                                         close_channel(channel_id, channel_manager.clone());
 358                                 }
 359                                 "forceclosechannel" => {
 360                                         let channel_id_str = words.next();
 361                                         if channel_id_str.is_none() {
 362                                                 println!("ERROR: forceclosechannel requires a channel ID: `forceclosechannel <channel_id>`");
 363                                                 print!("> ");
 364                                                 io::stdout().flush().unwrap();
 365                                                 continue;
 366                                         }
 367                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 368                                         if channel_id_vec.is_none() {
 369                                                 println!("ERROR: couldn't parse channel_id as hex");
 370                                                 print!("> ");
 371                                                 io::stdout().flush().unwrap();
 372                                                 continue;
 373                                         }
 374                                         let mut channel_id = [0; 32];
 375                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 376                                         force_close_channel(channel_id, channel_manager.clone());
 377                                 }
 378                                 _ => println!("Unknown command. See `\"help\" for available commands."),
 379                         }
 380                 }
 381                 print!("> ");
 382                 io::stdout().flush().unwrap();
 383         }
 384 }
 385
 386 fn help() {
 387         println!("openchannel pubkey@host:port <channel_amt_satoshis>");
 388         println!("sendpayment <invoice>");
 389         println!("getinvoice <amt_in_millisatoshis>");
 390         println!("connectpeer pubkey@host:port");
 391         println!("listchannels");
 392         println!("listpayments");
 393         println!("closechannel <channel_id>");
 394         println!("forceclosechannel <channel_id>");
 395 }
 396
 397 fn list_channels(channel_manager: Arc<ChannelManager>) {
 398         print!("[");
 399         for chan_info in channel_manager.list_channels() {
 400                 println!("");
 401                 println!("\t{{");
 402                 println!("\t\tchannel_id: {},", hex_utils::hex_str(&chan_info.channel_id[..]));
 403                 println!(
 404                         "\t\tpeer_pubkey: {},",
 405                         hex_utils::hex_str(&chan_info.remote_network_id.serialize())
 406                 );
 407                 let mut pending_channel = false;
 408                 match chan_info.short_channel_id {
 409                         Some(id) => println!("\t\tshort_channel_id: {},", id),
 410                         None => {
 411                                 pending_channel = true;
 412                         }
 413                 }
 414                 println!("\t\tpending_open: {},", pending_channel);
 415                 println!("\t\tchannel_value_satoshis: {},", chan_info.channel_value_satoshis);
 416                 println!("\t\tchannel_can_send_payments: {},", chan_info.is_live);
 417                 println!("\t}},");
 418         }
 419         println!("]");
 420 }
 421
 422 fn list_payments(payment_storage: PaymentInfoStorage) {
 423         let payments = payment_storage.lock().unwrap();
 424         print!("[");
 425         for (payment_hash, payment_info) in payments.deref() {
 426                 println!("");
 427                 println!("\t{{");
 428                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 429                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 430                 // println!("\t\thtlc_direction: {},", direction_str);
 431                 println!(
 432                         "\t\thtlc_status: {},",
 433                         match payment_info.status {
 434                                 HTLCStatus::Pending => "pending",
 435                                 HTLCStatus::Succeeded => "succeeded",
 436                                 HTLCStatus::Failed => "failed",
 437                         }
 438                 );
 439
 440                 println!("\t}},");
 441         }
 442         println!("]");
 443 }
 444
 445 pub(crate) fn connect_peer_if_necessary(
 446         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 447         event_notifier: mpsc::Sender<()>,
 448 ) -> Result<(), ()> {
 449         for node_pubkey in peer_manager.get_peer_node_ids() {
 450                 if node_pubkey == pubkey {
 451                         return Ok(());
 452                 }
 453         }
 454         match TcpStream::connect_timeout(&peer_addr, Duration::from_secs(10)) {
 455                 Ok(stream) => {
 456                         let peer_mgr = peer_manager.clone();
 457                         let event_ntfns = event_notifier.clone();
 458                         tokio::spawn(async move {
 459                                 lightning_net_tokio::setup_outbound(peer_mgr, event_ntfns, pubkey, stream).await;
 460                         });
 461                         let mut peer_connected = false;
 462                         while !peer_connected {
 463                                 for node_pubkey in peer_manager.get_peer_node_ids() {
 464                                         if node_pubkey == pubkey {
 465                                                 peer_connected = true;
 466                                         }
 467                                 }
 468                         }
 469                 }
 470                 Err(e) => {
 471                         println!("ERROR: failed to connect to peer: {:?}", e);
 472                         return Err(());
 473                 }
 474         }
 475         Ok(())
 476 }
 477
 478 fn open_channel(
 479         peer_pubkey: PublicKey, channel_amt_sat: u64, announce_channel: bool,
 480         channel_manager: Arc<ChannelManager>,
 481 ) -> Result<(), ()> {
 482         let mut config = UserConfig::default();
 483         if announce_channel {
 484                 config.channel_options.announced_channel = true;
 485         }
 486         // lnd's max to_self_delay is 2016, so we want to be compatible.
 487         config.peer_channel_config_limits.their_to_self_delay = 2016;
 488         match channel_manager.create_channel(peer_pubkey, channel_amt_sat, 0, 0, None) {
 489                 Ok(_) => {
 490                         println!("EVENT: initiated channel with peer {}. ", peer_pubkey);
 491                         return Ok(());
 492                 }
 493                 Err(e) => {
 494                         println!("ERROR: failed to open channel: {:?}", e);
 495                         return Err(());
 496                 }
 497         }
 498 }
 499
 500 fn send_payment(
 501         payee: PublicKey, amt_msat: u64, final_cltv: u32, payment_hash: PaymentHash,
 502         payment_secret: Option<PaymentSecret>, payee_features: Option<InvoiceFeatures>,
 503         mut route_hints: Vec<lightning_invoice::Route>,
 504         router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access>, Arc<FilesystemLogger>>>,
 505         channel_manager: Arc<ChannelManager>, payment_storage: PaymentInfoStorage,
 506         logger: Arc<FilesystemLogger>,
 507 ) {
 508         let network_graph = router.network_graph.read().unwrap();
 509         let first_hops = channel_manager.list_usable_channels();
 510         let payer_pubkey = channel_manager.get_our_node_id();
 511
 512         let mut hints: Vec<RouteHint> = Vec::new();
 513         for route in route_hints.drain(..) {
 514                 let route_hops = route.into_inner();
 515                 let last_hop = &route_hops[route_hops.len() - 1];
 516                 hints.push(RouteHint {
 517                         src_node_id: last_hop.pubkey,
 518                         short_channel_id: u64::from_be_bytes(last_hop.short_channel_id),
 519                         fees: RoutingFees {
 520                                 base_msat: last_hop.fee_base_msat,
 521                                 proportional_millionths: last_hop.fee_proportional_millionths,
 522                         },
 523                         cltv_expiry_delta: last_hop.cltv_expiry_delta,
 524                         htlc_minimum_msat: None,
 525                         htlc_maximum_msat: None,
 526                 })
 527         }
 528         let route = router::get_route(
 529                 &payer_pubkey,
 530                 &network_graph,
 531                 &payee,
 532                 payee_features,
 533                 Some(&first_hops.iter().collect::<Vec<_>>()),
 534                 &hints.iter().collect::<Vec<_>>(),
 535                 amt_msat,
 536                 final_cltv,
 537                 logger,
 538         );
 539         if let Err(e) = route {
 540                 println!("ERROR: failed to find route: {}", e.err);
 541                 return;
 542         }
 543         let status = match channel_manager.send_payment(&route.unwrap(), payment_hash, &payment_secret)
 544         {
 545                 Ok(()) => {
 546                         println!("EVENT: initiated sending {} msats to {}", amt_msat, payee);
 547                         HTLCStatus::Pending
 548                 }
 549                 Err(e) => {
 550                         println!("ERROR: failed to send payment: {:?}", e);
 551                         HTLCStatus::Failed
 552                 }
 553         };
 554         let mut payments = payment_storage.lock().unwrap();
 555         payments.insert(
 556                 payment_hash,
 557                 PaymentInfo {
 558                         preimage: None,
 559                         secret: payment_secret,
 560                         status,
 561                         amt_msat: MillisatAmount(Some(amt_msat)),
 562                 },
 563         );
 564 }
 565
 566 fn get_invoice(
 567         amt_msat: u64, payment_storage: PaymentInfoStorage, our_node_privkey: SecretKey,
 568         channel_manager: Arc<ChannelManager>, network: Network,
 569 ) {
 570         let mut payments = payment_storage.lock().unwrap();
 571         let secp_ctx = Secp256k1::new();
 572
 573         let mut preimage = [0; 32];
 574         rand::thread_rng().fill_bytes(&mut preimage);
 575         let payment_hash = Sha256Hash::hash(&preimage);
 576
 577         let our_node_pubkey = channel_manager.get_our_node_id();
 578         let mut invoice = lightning_invoice::InvoiceBuilder::new(match network {
 579                 Network::Bitcoin => lightning_invoice::Currency::Bitcoin,
 580                 Network::Testnet => lightning_invoice::Currency::BitcoinTestnet,
 581                 Network::Regtest => lightning_invoice::Currency::Regtest,
 582                 Network::Signet => panic!("Signet invoices not supported"),
 583         })
 584         .payment_hash(payment_hash)
 585         .description("rust-lightning-bitcoinrpc invoice".to_string())
 586         .amount_pico_btc(amt_msat * 10)
 587         .current_timestamp()
 588         .payee_pub_key(our_node_pubkey);
 589
 590         // Add route hints to the invoice.
 591         let our_channels = channel_manager.list_usable_channels();
 592         let mut min_final_cltv_expiry = 9;
 593         for channel in our_channels {
 594                 let short_channel_id = match channel.short_channel_id {
 595                         Some(id) => id.to_be_bytes(),
 596                         None => continue,
 597                 };
 598                 let forwarding_info = match channel.counterparty_forwarding_info {
 599                         Some(info) => info,
 600                         None => continue,
 601                 };
 602                 if forwarding_info.cltv_expiry_delta > min_final_cltv_expiry {
 603                         min_final_cltv_expiry = forwarding_info.cltv_expiry_delta;
 604                 }
 605                 invoice = invoice.route(vec![lightning_invoice::RouteHop {
 606                         pubkey: channel.remote_network_id,
 607                         short_channel_id,
 608                         fee_base_msat: forwarding_info.fee_base_msat,
 609                         fee_proportional_millionths: forwarding_info.fee_proportional_millionths,
 610                         cltv_expiry_delta: forwarding_info.cltv_expiry_delta,
 611                 }]);
 612         }
 613         invoice = invoice.min_final_cltv_expiry(min_final_cltv_expiry.into());
 614
 615         // Sign the invoice.
 616         let invoice =
 617                 invoice.build_signed(|msg_hash| secp_ctx.sign_recoverable(msg_hash, &our_node_privkey));
 618
 619         match invoice {
 620                 Ok(invoice) => println!("SUCCESS: generated invoice: {}", invoice),
 621                 Err(e) => println!("ERROR: failed to create invoice: {:?}", e),
 622         }
 623
 624         payments.insert(
 625                 PaymentHash(payment_hash.into_inner()),
 626                 PaymentInfo {
 627                         preimage: Some(PaymentPreimage(preimage)),
 628                         // We can't add payment secrets to invoices until we support features in invoices.
 629                         // Otherwise lnd errors with "destination hop doesn't understand payment addresses"
 630                         // (for context, lnd calls payment secrets "payment addresses").
 631                         secret: None,
 632                         status: HTLCStatus::Pending,
 633                         amt_msat: MillisatAmount(Some(amt_msat)),
 634                 },
 635         );
 636 }
 637
 638 fn close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 639         match channel_manager.close_channel(&channel_id) {
 640                 Ok(()) => println!("EVENT: initiating channel close"),
 641                 Err(e) => println!("ERROR: failed to close channel: {:?}", e),
 642         }
 643 }
 644
 645 fn force_close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 646         match channel_manager.force_close_channel(&channel_id) {
 647                 Ok(()) => println!("EVENT: initiating channel force-close"),
 648                 Err(e) => println!("ERROR: failed to force-close channel: {:?}", e),
 649         }
 650 }
 651
 652 pub(crate) fn parse_peer_info(
 653         peer_pubkey_and_ip_addr: String,
 654 ) -> Result<(PublicKey, SocketAddr), std::io::Error> {
 655         let mut pubkey_and_addr = peer_pubkey_and_ip_addr.split("@");
 656         let pubkey = pubkey_and_addr.next();
 657         let peer_addr_str = pubkey_and_addr.next();
 658         if peer_addr_str.is_none() || peer_addr_str.is_none() {
 659                 return Err(std::io::Error::new(
 660                         std::io::ErrorKind::Other,
 661                         "ERROR: incorrectly formatted peer
 662         info. Should be formatted as: `pubkey@host:port`",
 663                 ));
 664         }
 665
 666         let peer_addr: Result<SocketAddr, _> = peer_addr_str.unwrap().parse();
 667         if peer_addr.is_err() {
 668                 return Err(std::io::Error::new(
 669                         std::io::ErrorKind::Other,
 670                         "ERROR: couldn't parse pubkey@host:port into a socket address",
 671                 ));
 672         }
 673
 674         let pubkey = hex_utils::to_compressed_pubkey(pubkey.unwrap());
 675         if pubkey.is_none() {
 676                 return Err(std::io::Error::new(
 677                         std::io::ErrorKind::Other,
 678                         "ERROR: unable to parse given pubkey for node",
 679                 ));
 680         }
 681
 682         Ok((pubkey.unwrap(), peer_addr.unwrap()))
 683 }