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

   1 use crate::disk;
   2 use crate::hex_utils;
   3 use crate::{
   4         ChannelManager, FilesystemLogger, HTLCStatus, InvoicePayer, MillisatAmount, PaymentInfo,
   5         PaymentInfoStorage, PeerManager,
   6 };
   7 use bitcoin::hashes::Hash;
   8 use bitcoin::network::constants::Network;
   9 use bitcoin::secp256k1::key::PublicKey;
  10 use lightning::chain::keysinterface::{KeysInterface, KeysManager};
  11 use lightning::ln::msgs::NetAddress;
  12 use lightning::ln::PaymentHash;
  13 use lightning::routing::network_graph::NetworkGraph;
  14 use lightning::routing::router;
  15 use lightning::routing::router::{Payee, RouteParameters};
  16 use lightning::routing::scorer::Scorer;
  17 use lightning::util::config::{ChannelConfig, ChannelHandshakeLimits, UserConfig};
  18 use lightning::util::events::EventHandler;
  19 use lightning_invoice::payment::PaymentError;
  20 use lightning_invoice::{utils, Currency, Invoice};
  21 use std::env;
  22 use std::io;
  23 use std::io::{BufRead, Write};
  24 use std::net::{IpAddr, SocketAddr, ToSocketAddrs};
  25 use std::ops::Deref;
  26 use std::path::Path;
  27 use std::str::FromStr;
  28 use std::sync::{Arc, Mutex};
  29 use std::time::Duration;
  30
  31 pub(crate) struct LdkUserInfo {
  32         pub(crate) bitcoind_rpc_username: String,
  33         pub(crate) bitcoind_rpc_password: String,
  34         pub(crate) bitcoind_rpc_port: u16,
  35         pub(crate) bitcoind_rpc_host: String,
  36         pub(crate) ldk_storage_dir_path: String,
  37         pub(crate) ldk_peer_listening_port: u16,
  38         pub(crate) ldk_announced_listen_addr: Vec<NetAddress>,
  39         pub(crate) ldk_announced_node_name: [u8; 32],
  40         pub(crate) network: Network,
  41 }
  42
  43 pub(crate) fn parse_startup_args() -> Result<LdkUserInfo, ()> {
  44         if env::args().len() < 3 {
  45                 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-node-name announced-listen-addr*]`");
  46                 return Err(());
  47         }
  48         let bitcoind_rpc_info = env::args().skip(1).next().unwrap();
  49         let bitcoind_rpc_info_parts: Vec<&str> = bitcoind_rpc_info.rsplitn(2, "@").collect();
  50         if bitcoind_rpc_info_parts.len() != 2 {
  51                 println!("ERROR: bad bitcoind RPC URL provided");
  52                 return Err(());
  53         }
  54         let rpc_user_and_password: Vec<&str> = bitcoind_rpc_info_parts[1].split(":").collect();
  55         if rpc_user_and_password.len() != 2 {
  56                 println!("ERROR: bad bitcoind RPC username/password combo provided");
  57                 return Err(());
  58         }
  59         let bitcoind_rpc_username = rpc_user_and_password[0].to_string();
  60         let bitcoind_rpc_password = rpc_user_and_password[1].to_string();
  61         let bitcoind_rpc_path: Vec<&str> = bitcoind_rpc_info_parts[0].split(":").collect();
  62         if bitcoind_rpc_path.len() != 2 {
  63                 println!("ERROR: bad bitcoind RPC path provided");
  64                 return Err(());
  65         }
  66         let bitcoind_rpc_host = bitcoind_rpc_path[0].to_string();
  67         let bitcoind_rpc_port = bitcoind_rpc_path[1].parse::<u16>().unwrap();
  68
  69         let ldk_storage_dir_path = env::args().skip(2).next().unwrap();
  70
  71         let mut ldk_peer_port_set = true;
  72         let ldk_peer_listening_port: u16 = match env::args().skip(3).next().map(|p| p.parse()) {
  73                 Some(Ok(p)) => p,
  74                 Some(Err(_)) => {
  75                         ldk_peer_port_set = false;
  76                         9735
  77                 }
  78                 None => {
  79                         ldk_peer_port_set = false;
  80                         9735
  81                 }
  82         };
  83
  84         let mut arg_idx = match ldk_peer_port_set {
  85                 true => 4,
  86                 false => 3,
  87         };
  88         let network: Network = match env::args().skip(arg_idx).next().as_ref().map(String::as_str) {
  89                 Some("testnet") => Network::Testnet,
  90                 Some("regtest") => Network::Regtest,
  91                 Some("signet") => Network::Signet,
  92                 Some(net) => {
  93                         panic!("Unsupported network provided. Options are: `regtest`, `testnet`, and `signet`. Got {}", net);
  94                 }
  95                 None => Network::Testnet,
  96         };
  97
  98         let ldk_announced_node_name = match env::args().skip(arg_idx + 1).next().as_ref() {
  99                 Some(s) => {
 100                         if s.len() > 32 {
 101                                 panic!("Node Alias can not be longer than 32 bytes");
 102                         }
 103                         arg_idx += 1;
 104                         let mut bytes = [0; 32];
 105                         bytes[..s.len()].copy_from_slice(s.as_bytes());
 106                         bytes
 107                 }
 108                 None => [0; 32],
 109         };
 110
 111         let mut ldk_announced_listen_addr = Vec::new();
 112         loop {
 113                 match env::args().skip(arg_idx + 1).next().as_ref() {
 114                         Some(s) => match IpAddr::from_str(s) {
 115                                 Ok(IpAddr::V4(a)) => {
 116                                         ldk_announced_listen_addr
 117                                                 .push(NetAddress::IPv4 { addr: a.octets(), port: ldk_peer_listening_port });
 118                                         arg_idx += 1;
 119                                 }
 120                                 Ok(IpAddr::V6(a)) => {
 121                                         ldk_announced_listen_addr
 122                                                 .push(NetAddress::IPv6 { addr: a.octets(), port: ldk_peer_listening_port });
 123                                         arg_idx += 1;
 124                                 }
 125                                 Err(_) => panic!("Failed to parse announced-listen-addr into an IP address"),
 126                         },
 127                         None => break,
 128                 }
 129         }
 130
 131         Ok(LdkUserInfo {
 132                 bitcoind_rpc_username,
 133                 bitcoind_rpc_password,
 134                 bitcoind_rpc_host,
 135                 bitcoind_rpc_port,
 136                 ldk_storage_dir_path,
 137                 ldk_peer_listening_port,
 138                 ldk_announced_listen_addr,
 139                 ldk_announced_node_name,
 140                 network,
 141         })
 142 }
 143
 144 pub(crate) async fn poll_for_user_input<E: EventHandler>(
 145         invoice_payer: Arc<InvoicePayer<E>>, peer_manager: Arc<PeerManager>,
 146         channel_manager: Arc<ChannelManager>, keys_manager: Arc<KeysManager>,
 147         network_graph: Arc<NetworkGraph>, scorer: Arc<Mutex<Scorer>>,
 148         inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage,
 149         ldk_data_dir: String, logger: Arc<FilesystemLogger>, network: Network,
 150 ) {
 151         println!("LDK startup successful. To view available commands: \"help\".");
 152         println!("LDK logs are available at <your-supplied-ldk-data-dir-path>/.ldk/logs");
 153         println!("Local Node ID is {}.", channel_manager.get_our_node_id());
 154         let stdin = io::stdin();
 155         print!("> ");
 156         io::stdout().flush().unwrap(); // Without flushing, the `>` doesn't print
 157         for line in stdin.lock().lines() {
 158                 let line = line.unwrap();
 159                 let mut words = line.split_whitespace();
 160                 if let Some(word) = words.next() {
 161                         match word {
 162                                 "help" => help(),
 163                                 "openchannel" => {
 164                                         let peer_pubkey_and_ip_addr = words.next();
 165                                         let channel_value_sat = words.next();
 166                                         if peer_pubkey_and_ip_addr.is_none() || channel_value_sat.is_none() {
 167                                                 println!("ERROR: openchannel has 2 required arguments: `openchannel pubkey@host:port channel_amt_satoshis` [--public]");
 168                                                 print!("> ");
 169                                                 io::stdout().flush().unwrap();
 170                                                 continue;
 171                                         }
 172                                         let peer_pubkey_and_ip_addr = peer_pubkey_and_ip_addr.unwrap();
 173                                         let (pubkey, peer_addr) =
 174                                                 match parse_peer_info(peer_pubkey_and_ip_addr.to_string()) {
 175                                                         Ok(info) => info,
 176                                                         Err(e) => {
 177                                                                 println!("{:?}", e.into_inner().unwrap());
 178                                                                 print!("> ");
 179                                                                 io::stdout().flush().unwrap();
 180                                                                 continue;
 181                                                         }
 182                                                 };
 183
 184                                         let chan_amt_sat: Result<u64, _> = channel_value_sat.unwrap().parse();
 185                                         if chan_amt_sat.is_err() {
 186                                                 println!("ERROR: channel amount must be a number");
 187                                                 print!("> ");
 188                                                 io::stdout().flush().unwrap();
 189                                                 continue;
 190                                         }
 191
 192                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 193                                                 .await
 194                                                 .is_err()
 195                                         {
 196                                                 print!("> ");
 197                                                 io::stdout().flush().unwrap();
 198                                                 continue;
 199                                         };
 200
 201                                         let announce_channel = match words.next() {
 202                                                 Some("--public") | Some("--public=true") => true,
 203                                                 Some("--public=false") => false,
 204                                                 Some(_) => {
 205                                                         println!("ERROR: invalid `--public` command format. Valid formats: `--public`, `--public=true` `--public=false`");
 206                                                         print!("> ");
 207                                                         io::stdout().flush().unwrap();
 208                                                         continue;
 209                                                 }
 210                                                 None => false,
 211                                         };
 212
 213                                         if open_channel(
 214                                                 pubkey,
 215                                                 chan_amt_sat.unwrap(),
 216                                                 announce_channel,
 217                                                 channel_manager.clone(),
 218                                         )
 219                                         .is_ok()
 220                                         {
 221                                                 let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
 222                                                 let _ = disk::persist_channel_peer(
 223                                                         Path::new(&peer_data_path),
 224                                                         peer_pubkey_and_ip_addr,
 225                                                 );
 226                                         }
 227                                 }
 228                                 "sendpayment" => {
 229                                         let invoice_str = words.next();
 230                                         if invoice_str.is_none() {
 231                                                 println!("ERROR: sendpayment requires an invoice: `sendpayment <invoice>`");
 232                                                 print!("> ");
 233                                                 io::stdout().flush().unwrap();
 234                                                 continue;
 235                                         }
 236
 237                                         let invoice = match Invoice::from_str(invoice_str.unwrap()) {
 238                                                 Ok(inv) => inv,
 239                                                 Err(e) => {
 240                                                         println!("ERROR: invalid invoice: {:?}", e);
 241                                                         print!("> ");
 242                                                         io::stdout().flush().unwrap();
 243                                                         continue;
 244                                                 }
 245                                         };
 246
 247                                         send_payment(&*invoice_payer, &invoice, outbound_payments.clone());
 248                                 }
 249                                 "keysend" => {
 250                                         let dest_pubkey = match words.next() {
 251                                                 Some(dest) => match hex_utils::to_compressed_pubkey(dest) {
 252                                                         Some(pk) => pk,
 253                                                         None => {
 254                                                                 println!("ERROR: couldn't parse destination pubkey");
 255                                                                 print!("> ");
 256                                                                 io::stdout().flush().unwrap();
 257                                                                 continue;
 258                                                         }
 259                                                 },
 260                                                 None => {
 261                                                         println!("ERROR: keysend requires a destination pubkey: `keysend <dest_pubkey> <amt_msat>`");
 262                                                         print!("> ");
 263                                                         io::stdout().flush().unwrap();
 264                                                         continue;
 265                                                 }
 266                                         };
 267                                         let amt_msat_str = match words.next() {
 268                                                 Some(amt) => amt,
 269                                                 None => {
 270                                                         println!("ERROR: keysend requires an amount in millisatoshis: `keysend <dest_pubkey> <amt_msat>`");
 271
 272                                                         print!("> ");
 273                                                         io::stdout().flush().unwrap();
 274                                                         continue;
 275                                                 }
 276                                         };
 277                                         let amt_msat: u64 = match amt_msat_str.parse() {
 278                                                 Ok(amt) => amt,
 279                                                 Err(e) => {
 280                                                         println!("ERROR: couldn't parse amount_msat: {}", e);
 281                                                         print!("> ");
 282                                                         io::stdout().flush().unwrap();
 283                                                         continue;
 284                                                 }
 285                                         };
 286                                         keysend(
 287                                                 dest_pubkey,
 288                                                 amt_msat,
 289                                                 network_graph.clone(),
 290                                                 channel_manager.clone(),
 291                                                 outbound_payments.clone(),
 292                                                 logger.clone(),
 293                                                 scorer.clone(),
 294                                         );
 295                                 }
 296                                 "getinvoice" => {
 297                                         let amt_str = words.next();
 298                                         if amt_str.is_none() {
 299                                                 println!("ERROR: getinvoice requires an amount in millisatoshis");
 300                                                 print!("> ");
 301                                                 io::stdout().flush().unwrap();
 302                                                 continue;
 303                                         }
 304
 305                                         let amt_msat: Result<u64, _> = amt_str.unwrap().parse();
 306                                         if amt_msat.is_err() {
 307                                                 println!("ERROR: getinvoice provided payment amount was not a number");
 308                                                 print!("> ");
 309                                                 io::stdout().flush().unwrap();
 310                                                 continue;
 311                                         }
 312                                         get_invoice(
 313                                                 amt_msat.unwrap(),
 314                                                 inbound_payments.clone(),
 315                                                 channel_manager.clone(),
 316                                                 keys_manager.clone(),
 317                                                 network,
 318                                         );
 319                                 }
 320                                 "connectpeer" => {
 321                                         let peer_pubkey_and_ip_addr = words.next();
 322                                         if peer_pubkey_and_ip_addr.is_none() {
 323                                                 println!("ERROR: connectpeer requires peer connection info: `connectpeer pubkey@host:port`");
 324                                                 print!("> ");
 325                                                 io::stdout().flush().unwrap();
 326                                                 continue;
 327                                         }
 328                                         let (pubkey, peer_addr) =
 329                                                 match parse_peer_info(peer_pubkey_and_ip_addr.unwrap().to_string()) {
 330                                                         Ok(info) => info,
 331                                                         Err(e) => {
 332                                                                 println!("{:?}", e.into_inner().unwrap());
 333                                                                 print!("> ");
 334                                                                 io::stdout().flush().unwrap();
 335                                                                 continue;
 336                                                         }
 337                                                 };
 338                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 339                                                 .await
 340                                                 .is_ok()
 341                                         {
 342                                                 println!("SUCCESS: connected to peer {}", pubkey);
 343                                         }
 344                                 }
 345                                 "listchannels" => list_channels(channel_manager.clone()),
 346                                 "listpayments" => {
 347                                         list_payments(inbound_payments.clone(), outbound_payments.clone())
 348                                 }
 349                                 "closechannel" => {
 350                                         let channel_id_str = words.next();
 351                                         if channel_id_str.is_none() {
 352                                                 println!("ERROR: closechannel requires a channel ID: `closechannel <channel_id>`");
 353                                                 print!("> ");
 354                                                 io::stdout().flush().unwrap();
 355                                                 continue;
 356                                         }
 357                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 358                                         if channel_id_vec.is_none() {
 359                                                 println!("ERROR: couldn't parse channel_id as hex");
 360                                                 print!("> ");
 361                                                 io::stdout().flush().unwrap();
 362                                                 continue;
 363                                         }
 364                                         let mut channel_id = [0; 32];
 365                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 366                                         close_channel(channel_id, channel_manager.clone());
 367                                 }
 368                                 "forceclosechannel" => {
 369                                         let channel_id_str = words.next();
 370                                         if channel_id_str.is_none() {
 371                                                 println!("ERROR: forceclosechannel requires a channel ID: `forceclosechannel <channel_id>`");
 372                                                 print!("> ");
 373                                                 io::stdout().flush().unwrap();
 374                                                 continue;
 375                                         }
 376                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 377                                         if channel_id_vec.is_none() {
 378                                                 println!("ERROR: couldn't parse channel_id as hex");
 379                                                 print!("> ");
 380                                                 io::stdout().flush().unwrap();
 381                                                 continue;
 382                                         }
 383                                         let mut channel_id = [0; 32];
 384                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 385                                         force_close_channel(channel_id, channel_manager.clone());
 386                                 }
 387                                 "nodeinfo" => node_info(channel_manager.clone(), peer_manager.clone()),
 388                                 "listpeers" => list_peers(peer_manager.clone()),
 389                                 "signmessage" => {
 390                                         const MSG_STARTPOS: usize = "signmsg".len() + 1;
 391                                         if line.as_bytes().len() <= MSG_STARTPOS {
 392                                                 println!("ERROR: signmsg requires a message");
 393                                                 print!("> ");
 394                                                 io::stdout().flush().unwrap();
 395                                                 continue;
 396                                         }
 397                                         println!(
 398                                                 "{:?}",
 399                                                 lightning::util::message_signing::sign(
 400                                                         &line.as_bytes()[MSG_STARTPOS..],
 401                                                         &keys_manager.get_node_secret()
 402                                                 )
 403                                         );
 404                                         print!("> ");
 405                                         io::stdout().flush().unwrap();
 406                                 }
 407                                 _ => println!("Unknown command. See `\"help\" for available commands."),
 408                         }
 409                 }
 410                 print!("> ");
 411                 io::stdout().flush().unwrap();
 412         }
 413 }
 414
 415 fn help() {
 416         println!("openchannel pubkey@host:port <amt_satoshis>");
 417         println!("sendpayment <invoice>");
 418         println!("getinvoice <amt_millisatoshis>");
 419         println!("connectpeer pubkey@host:port");
 420         println!("listchannels");
 421         println!("listpayments");
 422         println!("closechannel <channel_id>");
 423         println!("forceclosechannel <channel_id>");
 424         println!("nodeinfo");
 425         println!("listpeers");
 426         println!("signmessage <message>");
 427 }
 428
 429 fn node_info(channel_manager: Arc<ChannelManager>, peer_manager: Arc<PeerManager>) {
 430         println!("\t{{");
 431         println!("\t\t node_pubkey: {}", channel_manager.get_our_node_id());
 432         println!("\t\t num_channels: {}", channel_manager.list_channels().len());
 433         println!("\t\t num_usable_channels: {}", channel_manager.list_usable_channels().len());
 434         println!("\t\t num_peers: {}", peer_manager.get_peer_node_ids().len());
 435         println!("\t}},");
 436 }
 437
 438 fn list_peers(peer_manager: Arc<PeerManager>) {
 439         println!("\t{{");
 440         for pubkey in peer_manager.get_peer_node_ids() {
 441                 println!("\t\t pubkey: {}", pubkey);
 442         }
 443         println!("\t}},");
 444 }
 445
 446 fn list_channels(channel_manager: Arc<ChannelManager>) {
 447         print!("[");
 448         for chan_info in channel_manager.list_channels() {
 449                 println!("");
 450                 println!("\t{{");
 451                 println!("\t\tchannel_id: {},", hex_utils::hex_str(&chan_info.channel_id[..]));
 452                 if let Some(funding_txo) = chan_info.funding_txo {
 453                         println!("\t\tfunding_txid: {},", funding_txo.txid);
 454                 }
 455                 println!(
 456                         "\t\tpeer_pubkey: {},",
 457                         hex_utils::hex_str(&chan_info.counterparty.node_id.serialize())
 458                 );
 459                 if let Some(id) = chan_info.short_channel_id {
 460                         println!("\t\tshort_channel_id: {},", id);
 461                 }
 462                 println!("\t\tis_confirmed_onchain: {},", chan_info.is_funding_locked);
 463                 println!("\t\tchannel_value_satoshis: {},", chan_info.channel_value_satoshis);
 464                 println!(
 465                         "\t\tlocal_balance_msat: {},",
 466                         chan_info.outbound_capacity_msat
 467                                 + chan_info.unspendable_punishment_reserve.unwrap_or(0) * 1000
 468                 );
 469                 if chan_info.is_usable {
 470                         println!("\t\tavailable_balance_for_send_msat: {},", chan_info.outbound_capacity_msat);
 471                         println!("\t\tavailable_balance_for_recv_msat: {},", chan_info.inbound_capacity_msat);
 472                 }
 473                 println!("\t\tchannel_can_send_payments: {},", chan_info.is_usable);
 474                 println!("\t\tpublic: {},", chan_info.is_public);
 475                 println!("\t}},");
 476         }
 477         println!("]");
 478 }
 479
 480 fn list_payments(inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage) {
 481         let inbound = inbound_payments.lock().unwrap();
 482         let outbound = outbound_payments.lock().unwrap();
 483         print!("[");
 484         for (payment_hash, payment_info) in inbound.deref() {
 485                 println!("");
 486                 println!("\t{{");
 487                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 488                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 489                 println!("\t\thtlc_direction: inbound,");
 490                 println!(
 491                         "\t\thtlc_status: {},",
 492                         match payment_info.status {
 493                                 HTLCStatus::Pending => "pending",
 494                                 HTLCStatus::Succeeded => "succeeded",
 495                                 HTLCStatus::Failed => "failed",
 496                         }
 497                 );
 498
 499                 println!("\t}},");
 500         }
 501
 502         for (payment_hash, payment_info) in outbound.deref() {
 503                 println!("");
 504                 println!("\t{{");
 505                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 506                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 507                 println!("\t\thtlc_direction: outbound,");
 508                 println!(
 509                         "\t\thtlc_status: {},",
 510                         match payment_info.status {
 511                                 HTLCStatus::Pending => "pending",
 512                                 HTLCStatus::Succeeded => "succeeded",
 513                                 HTLCStatus::Failed => "failed",
 514                         }
 515                 );
 516
 517                 println!("\t}},");
 518         }
 519         println!("]");
 520 }
 521
 522 pub(crate) async fn connect_peer_if_necessary(
 523         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 524 ) -> Result<(), ()> {
 525         for node_pubkey in peer_manager.get_peer_node_ids() {
 526                 if node_pubkey == pubkey {
 527                         return Ok(());
 528                 }
 529         }
 530         match lightning_net_tokio::connect_outbound(Arc::clone(&peer_manager), pubkey, peer_addr).await
 531         {
 532                 Some(connection_closed_future) => {
 533                         let mut connection_closed_future = Box::pin(connection_closed_future);
 534                         loop {
 535                                 match futures::poll!(&mut connection_closed_future) {
 536                                         std::task::Poll::Ready(_) => {
 537                                                 println!("ERROR: Peer disconnected before we finished the handshake");
 538                                                 return Err(());
 539                                         }
 540                                         std::task::Poll::Pending => {}
 541                                 }
 542                                 // Avoid blocking the tokio context by sleeping a bit
 543                                 match peer_manager.get_peer_node_ids().iter().find(|id| **id == pubkey) {
 544                                         Some(_) => break,
 545                                         None => tokio::time::sleep(Duration::from_millis(10)).await,
 546                                 }
 547                         }
 548                 }
 549                 None => {
 550                         println!("ERROR: failed to connect to peer");
 551                         return Err(());
 552                 }
 553         }
 554         Ok(())
 555 }
 556
 557 fn open_channel(
 558         peer_pubkey: PublicKey, channel_amt_sat: u64, announced_channel: bool,
 559         channel_manager: Arc<ChannelManager>,
 560 ) -> Result<(), ()> {
 561         let config = UserConfig {
 562                 peer_channel_config_limits: ChannelHandshakeLimits {
 563                         // lnd's max to_self_delay is 2016, so we want to be compatible.
 564                         their_to_self_delay: 2016,
 565                         ..Default::default()
 566                 },
 567                 channel_options: ChannelConfig { announced_channel, ..Default::default() },
 568                 ..Default::default()
 569         };
 570
 571         match channel_manager.create_channel(peer_pubkey, channel_amt_sat, 0, 0, Some(config)) {
 572                 Ok(_) => {
 573                         println!("EVENT: initiated channel with peer {}. ", peer_pubkey);
 574                         return Ok(());
 575                 }
 576                 Err(e) => {
 577                         println!("ERROR: failed to open channel: {:?}", e);
 578                         return Err(());
 579                 }
 580         }
 581 }
 582
 583 fn send_payment<E: EventHandler>(
 584         invoice_payer: &InvoicePayer<E>, invoice: &Invoice, payment_storage: PaymentInfoStorage,
 585 ) {
 586         let status = match invoice_payer.pay_invoice(invoice) {
 587                 Ok(_payment_id) => {
 588                         let payee_pubkey = invoice.recover_payee_pub_key();
 589                         let amt_msat = invoice.amount_milli_satoshis().unwrap();
 590                         println!("EVENT: initiated sending {} msats to {}", amt_msat, payee_pubkey);
 591                         print!("> ");
 592                         HTLCStatus::Pending
 593                 }
 594                 Err(PaymentError::Invoice(e)) => {
 595                         println!("ERROR: invalid invoice: {}", e);
 596                         print!("> ");
 597                         return;
 598                 }
 599                 Err(PaymentError::Routing(e)) => {
 600                         println!("ERROR: failed to find route: {}", e.err);
 601                         print!("> ");
 602                         return;
 603                 }
 604                 Err(PaymentError::Sending(e)) => {
 605                         println!("ERROR: failed to send payment: {:?}", e);
 606                         print!("> ");
 607                         HTLCStatus::Failed
 608                 }
 609         };
 610         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 611         let payment_secret = Some(invoice.payment_secret().clone());
 612
 613         let mut payments = payment_storage.lock().unwrap();
 614         payments.insert(
 615                 payment_hash,
 616                 PaymentInfo {
 617                         preimage: None,
 618                         secret: payment_secret,
 619                         status,
 620                         amt_msat: MillisatAmount(invoice.amount_milli_satoshis()),
 621                 },
 622         );
 623 }
 624
 625 fn keysend(
 626         payee_pubkey: PublicKey, amt_msat: u64, network_graph: Arc<NetworkGraph>,
 627         channel_manager: Arc<ChannelManager>, payment_storage: PaymentInfoStorage,
 628         logger: Arc<FilesystemLogger>, scorer: Arc<Mutex<Scorer>>,
 629 ) {
 630         let first_hops = channel_manager.list_usable_channels();
 631         let payer_pubkey = channel_manager.get_our_node_id();
 632
 633         let payee = Payee::for_keysend(payee_pubkey);
 634         let params = RouteParameters { payee, final_value_msat: amt_msat, final_cltv_expiry_delta: 40 };
 635
 636         let route = match router::find_route(
 637                 &payer_pubkey,
 638                 &params,
 639                 &network_graph,
 640                 Some(&first_hops.iter().collect::<Vec<_>>()),
 641                 logger,
 642                 &scorer.lock().unwrap(),
 643         ) {
 644                 Ok(r) => r,
 645                 Err(e) => {
 646                         println!("ERROR: failed to find route: {}", e.err);
 647                         return;
 648                 }
 649         };
 650
 651         let mut payments = payment_storage.lock().unwrap();
 652         let payment_hash = channel_manager.send_spontaneous_payment(&route, None).unwrap().0;
 653         payments.insert(
 654                 payment_hash,
 655                 PaymentInfo {
 656                         preimage: None,
 657                         secret: None,
 658                         status: HTLCStatus::Pending,
 659                         amt_msat: MillisatAmount(Some(amt_msat)),
 660                 },
 661         );
 662 }
 663
 664 fn get_invoice(
 665         amt_msat: u64, payment_storage: PaymentInfoStorage, channel_manager: Arc<ChannelManager>,
 666         keys_manager: Arc<KeysManager>, network: Network,
 667 ) {
 668         let mut payments = payment_storage.lock().unwrap();
 669         let currency = match network {
 670                 Network::Bitcoin => Currency::Bitcoin,
 671                 Network::Testnet => Currency::BitcoinTestnet,
 672                 Network::Regtest => Currency::Regtest,
 673                 Network::Signet => Currency::Signet,
 674         };
 675         let invoice = match utils::create_invoice_from_channelmanager(
 676                 &channel_manager,
 677                 keys_manager,
 678                 currency,
 679                 Some(amt_msat),
 680                 "ldk-tutorial-node".to_string(),
 681         ) {
 682                 Ok(inv) => {
 683                         println!("SUCCESS: generated invoice: {}", inv);
 684                         inv
 685                 }
 686                 Err(e) => {
 687                         println!("ERROR: failed to create invoice: {:?}", e);
 688                         return;
 689                 }
 690         };
 691
 692         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 693         payments.insert(
 694                 payment_hash,
 695                 PaymentInfo {
 696                         preimage: None,
 697                         secret: Some(invoice.payment_secret().clone()),
 698                         status: HTLCStatus::Pending,
 699                         amt_msat: MillisatAmount(Some(amt_msat)),
 700                 },
 701         );
 702 }
 703
 704 fn close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 705         match channel_manager.close_channel(&channel_id) {
 706                 Ok(()) => println!("EVENT: initiating channel close"),
 707                 Err(e) => println!("ERROR: failed to close channel: {:?}", e),
 708         }
 709 }
 710
 711 fn force_close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 712         match channel_manager.force_close_channel(&channel_id) {
 713                 Ok(()) => println!("EVENT: initiating channel force-close"),
 714                 Err(e) => println!("ERROR: failed to force-close channel: {:?}", e),
 715         }
 716 }
 717
 718 pub(crate) fn parse_peer_info(
 719         peer_pubkey_and_ip_addr: String,
 720 ) -> Result<(PublicKey, SocketAddr), std::io::Error> {
 721         let mut pubkey_and_addr = peer_pubkey_and_ip_addr.split("@");
 722         let pubkey = pubkey_and_addr.next();
 723         let peer_addr_str = pubkey_and_addr.next();
 724         if peer_addr_str.is_none() || peer_addr_str.is_none() {
 725                 return Err(std::io::Error::new(
 726                         std::io::ErrorKind::Other,
 727                         "ERROR: incorrectly formatted peer info. Should be formatted as: `pubkey@host:port`",
 728                 ));
 729         }
 730
 731         let peer_addr = peer_addr_str.unwrap().to_socket_addrs().map(|mut r| r.next());
 732         if peer_addr.is_err() || peer_addr.as_ref().unwrap().is_none() {
 733                 return Err(std::io::Error::new(
 734                         std::io::ErrorKind::Other,
 735                         "ERROR: couldn't parse pubkey@host:port into a socket address",
 736                 ));
 737         }
 738
 739         let pubkey = hex_utils::to_compressed_pubkey(pubkey.unwrap());
 740         if pubkey.is_none() {
 741                 return Err(std::io::Error::new(
 742                         std::io::ErrorKind::Other,
 743                         "ERROR: unable to parse given pubkey for node",
 744                 ));
 745         }
 746
 747         Ok((pubkey.unwrap(), peer_addr.unwrap().unwrap()))
 748 }