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