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

   1 use crate::disk;
   2 use crate::hex_utils;
   3 use crate::{
   4         ChannelManager, FilesystemLogger, HTLCStatus, MillisatAmount, PaymentInfo, PaymentInfoStorage,
   5         PeerManager,
   6 };
   7 use bitcoin::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::features::InvoiceFeatures;
  12 use lightning::ln::msgs::NetAddress;
  13 use lightning::ln::{PaymentHash, PaymentSecret};
  14 use lightning::routing::network_graph::NetworkGraph;
  15 use lightning::routing::router;
  16 use lightning::routing::router::{Payee, RouteHint, RouteParameters};
  17 use lightning::routing::scorer::Scorer;
  18 use lightning::util::config::{ChannelConfig, ChannelHandshakeLimits, UserConfig};
  19 use lightning_invoice::{utils, Currency, Invoice};
  20 use std::env;
  21 use std::io;
  22 use std::io::{BufRead, Write};
  23 use std::net::{IpAddr, SocketAddr, ToSocketAddrs};
  24 use std::ops::Deref;
  25 use std::path::Path;
  26 use std::str::FromStr;
  27 use std::sync::Arc;
  28 use std::time::Duration;
  29
  30 pub(crate) struct LdkUserInfo {
  31         pub(crate) bitcoind_rpc_username: String,
  32         pub(crate) bitcoind_rpc_password: String,
  33         pub(crate) bitcoind_rpc_port: u16,
  34         pub(crate) bitcoind_rpc_host: String,
  35         pub(crate) ldk_storage_dir_path: String,
  36         pub(crate) ldk_peer_listening_port: u16,
  37         pub(crate) ldk_announced_listen_addr: Vec<NetAddress>,
  38         pub(crate) ldk_announced_node_name: [u8; 32],
  39         pub(crate) network: Network,
  40 }
  41
  42 pub(crate) fn parse_startup_args() -> Result<LdkUserInfo, ()> {
  43         if env::args().len() < 3 {
  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] [announced-node-name announced-listen-addr*]`");
  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.rsplitn(2, "@").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[1].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[0].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(_)) => {
  74                         ldk_peer_port_set = false;
  75                         9735
  76                 }
  77                 None => {
  78                         ldk_peer_port_set = false;
  79                         9735
  80                 }
  81         };
  82
  83         let mut arg_idx = match ldk_peer_port_set {
  84                 true => 4,
  85                 false => 3,
  86         };
  87         let network: Network = match env::args().skip(arg_idx).next().as_ref().map(String::as_str) {
  88                 Some("testnet") => Network::Testnet,
  89                 Some("regtest") => Network::Regtest,
  90                 Some(net) => {
  91                         panic!("Unsupported network provided. Options are: `regtest`, `testnet`. Got {}", net);
  92                 }
  93                 None => Network::Testnet,
  94         };
  95
  96         let ldk_announced_node_name = match env::args().skip(arg_idx + 1).next().as_ref() {
  97                 Some(s) => {
  98                         if s.len() > 32 {
  99                                 panic!("Node Alias can not be longer than 32 bytes");
 100                         }
 101                         arg_idx += 1;
 102                         let mut bytes = [0; 32];
 103                         bytes[..s.len()].copy_from_slice(s.as_bytes());
 104                         bytes
 105                 }
 106                 None => [0; 32],
 107         };
 108
 109         let mut ldk_announced_listen_addr = Vec::new();
 110         loop {
 111                 match env::args().skip(arg_idx + 1).next().as_ref() {
 112                         Some(s) => match IpAddr::from_str(s) {
 113                                 Ok(IpAddr::V4(a)) => {
 114                                         ldk_announced_listen_addr
 115                                                 .push(NetAddress::IPv4 { addr: a.octets(), port: ldk_peer_listening_port });
 116                                         arg_idx += 1;
 117                                 }
 118                                 Ok(IpAddr::V6(a)) => {
 119                                         ldk_announced_listen_addr
 120                                                 .push(NetAddress::IPv6 { addr: a.octets(), port: ldk_peer_listening_port });
 121                                         arg_idx += 1;
 122                                 }
 123                                 Err(_) => panic!("Failed to parse announced-listen-addr into an IP address"),
 124                         },
 125                         None => break,
 126                 }
 127         }
 128
 129         Ok(LdkUserInfo {
 130                 bitcoind_rpc_username,
 131                 bitcoind_rpc_password,
 132                 bitcoind_rpc_host,
 133                 bitcoind_rpc_port,
 134                 ldk_storage_dir_path,
 135                 ldk_peer_listening_port,
 136                 ldk_announced_listen_addr,
 137                 ldk_announced_node_name,
 138                 network,
 139         })
 140 }
 141
 142 pub(crate) async fn poll_for_user_input(
 143         peer_manager: Arc<PeerManager>, channel_manager: Arc<ChannelManager>,
 144         keys_manager: Arc<KeysManager>, network_graph: Arc<NetworkGraph>,
 145         inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage,
 146         ldk_data_dir: String, logger: Arc<FilesystemLogger>, network: Network,
 147 ) {
 148         println!("LDK startup successful. To view available commands: \"help\".");
 149         println!("LDK logs are available at <your-supplied-ldk-data-dir-path>/.ldk/logs");
 150         println!("Local Node ID is {}.", channel_manager.get_our_node_id());
 151         let stdin = io::stdin();
 152         print!("> ");
 153         io::stdout().flush().unwrap(); // Without flushing, the `>` doesn't print
 154         for line in stdin.lock().lines() {
 155                 let line = line.unwrap();
 156                 let mut words = line.split_whitespace();
 157                 if let Some(word) = words.next() {
 158                         match word {
 159                                 "help" => help(),
 160                                 "openchannel" => {
 161                                         let peer_pubkey_and_ip_addr = words.next();
 162                                         let channel_value_sat = words.next();
 163                                         if peer_pubkey_and_ip_addr.is_none() || channel_value_sat.is_none() {
 164                                                 println!("ERROR: openchannel has 2 required arguments: `openchannel pubkey@host:port channel_amt_satoshis` [--public]");
 165                                                 print!("> ");
 166                                                 io::stdout().flush().unwrap();
 167                                                 continue;
 168                                         }
 169                                         let peer_pubkey_and_ip_addr = peer_pubkey_and_ip_addr.unwrap();
 170                                         let (pubkey, peer_addr) =
 171                                                 match parse_peer_info(peer_pubkey_and_ip_addr.to_string()) {
 172                                                         Ok(info) => info,
 173                                                         Err(e) => {
 174                                                                 println!("{:?}", e.into_inner().unwrap());
 175                                                                 print!("> ");
 176                                                                 io::stdout().flush().unwrap();
 177                                                                 continue;
 178                                                         }
 179                                                 };
 180
 181                                         let chan_amt_sat: Result<u64, _> = channel_value_sat.unwrap().parse();
 182                                         if chan_amt_sat.is_err() {
 183                                                 println!("ERROR: channel amount must be a number");
 184                                                 print!("> ");
 185                                                 io::stdout().flush().unwrap();
 186                                                 continue;
 187                                         }
 188
 189                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 190                                                 .await
 191                                                 .is_err()
 192                                         {
 193                                                 print!("> ");
 194                                                 io::stdout().flush().unwrap();
 195                                                 continue;
 196                                         };
 197
 198                                         let announce_channel = match words.next() {
 199                                                 Some("--public") | Some("--public=true") => true,
 200                                                 Some("--public=false") => false,
 201                                                 Some(_) => {
 202                                                         println!("ERROR: invalid `--public` command format. Valid formats: `--public`, `--public=true` `--public=false`");
 203                                                         print!("> ");
 204                                                         io::stdout().flush().unwrap();
 205                                                         continue;
 206                                                 }
 207                                                 None => false,
 208                                         };
 209
 210                                         if open_channel(
 211                                                 pubkey,
 212                                                 chan_amt_sat.unwrap(),
 213                                                 announce_channel,
 214                                                 channel_manager.clone(),
 215                                         )
 216                                         .is_ok()
 217                                         {
 218                                                 let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
 219                                                 let _ = disk::persist_channel_peer(
 220                                                         Path::new(&peer_data_path),
 221                                                         peer_pubkey_and_ip_addr,
 222                                                 );
 223                                         }
 224                                 }
 225                                 "sendpayment" => {
 226                                         let invoice_str = words.next();
 227                                         if invoice_str.is_none() {
 228                                                 println!("ERROR: sendpayment requires an invoice: `sendpayment <invoice>`");
 229                                                 print!("> ");
 230                                                 io::stdout().flush().unwrap();
 231                                                 continue;
 232                                         }
 233
 234                                         let invoice = match Invoice::from_str(invoice_str.unwrap()) {
 235                                                 Ok(inv) => inv,
 236                                                 Err(e) => {
 237                                                         println!("ERROR: invalid invoice: {:?}", e);
 238                                                         print!("> ");
 239                                                         io::stdout().flush().unwrap();
 240                                                         continue;
 241                                                 }
 242                                         };
 243                                         let last_hops = invoice.route_hints();
 244
 245                                         let amt_msat = invoice.amount_milli_satoshis();
 246                                         if amt_msat.is_none() {
 247                                                 println!("ERROR: invalid invoice: must contain amount to pay");
 248                                                 print!("> ");
 249                                                 io::stdout().flush().unwrap();
 250                                                 continue;
 251                                         }
 252
 253                                         let payee_pubkey = invoice.recover_payee_pub_key();
 254                                         let final_cltv = invoice.min_final_cltv_expiry() as u32;
 255                                         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 256                                         let payment_secret = Some(invoice.payment_secret().clone());
 257                                         let invoice_features = invoice.features().cloned();
 258
 259                                         send_payment(
 260                                                 payee_pubkey,
 261                                                 amt_msat.unwrap(),
 262                                                 final_cltv,
 263                                                 payment_hash,
 264                                                 payment_secret,
 265                                                 invoice_features,
 266                                                 last_hops,
 267                                                 network_graph.clone(),
 268                                                 channel_manager.clone(),
 269                                                 outbound_payments.clone(),
 270                                                 logger.clone(),
 271                                         );
 272                                 }
 273                                 "keysend" => {
 274                                         let dest_pubkey = match words.next() {
 275                                                 Some(dest) => match hex_utils::to_compressed_pubkey(dest) {
 276                                                         Some(pk) => pk,
 277                                                         None => {
 278                                                                 println!("ERROR: couldn't parse destination pubkey");
 279                                                                 print!("> ");
 280                                                                 io::stdout().flush().unwrap();
 281                                                                 continue;
 282                                                         }
 283                                                 },
 284                                                 None => {
 285                                                         println!("ERROR: keysend requires a destination pubkey: `keysend <dest_pubkey> <amt_msat>`");
 286                                                         print!("> ");
 287                                                         io::stdout().flush().unwrap();
 288                                                         continue;
 289                                                 }
 290                                         };
 291                                         let amt_msat_str = match words.next() {
 292                                                 Some(amt) => amt,
 293                                                 None => {
 294                                                         println!("ERROR: keysend requires an amount in millisatoshis: `keysend <dest_pubkey> <amt_msat>`");
 295
 296                                                         print!("> ");
 297                                                         io::stdout().flush().unwrap();
 298                                                         continue;
 299                                                 }
 300                                         };
 301                                         let amt_msat: u64 = match amt_msat_str.parse() {
 302                                                 Ok(amt) => amt,
 303                                                 Err(e) => {
 304                                                         println!("ERROR: couldn't parse amount_msat: {}", e);
 305                                                         print!("> ");
 306                                                         io::stdout().flush().unwrap();
 307                                                         continue;
 308                                                 }
 309                                         };
 310                                         keysend(
 311                                                 dest_pubkey,
 312                                                 amt_msat,
 313                                                 network_graph.clone(),
 314                                                 channel_manager.clone(),
 315                                                 outbound_payments.clone(),
 316                                                 logger.clone(),
 317                                         );
 318                                 }
 319                                 "getinvoice" => {
 320                                         let amt_str = words.next();
 321                                         if amt_str.is_none() {
 322                                                 println!("ERROR: getinvoice requires an amount in millisatoshis");
 323                                                 print!("> ");
 324                                                 io::stdout().flush().unwrap();
 325                                                 continue;
 326                                         }
 327
 328                                         let amt_msat: Result<u64, _> = amt_str.unwrap().parse();
 329                                         if amt_msat.is_err() {
 330                                                 println!("ERROR: getinvoice provided payment amount was not a number");
 331                                                 print!("> ");
 332                                                 io::stdout().flush().unwrap();
 333                                                 continue;
 334                                         }
 335                                         get_invoice(
 336                                                 amt_msat.unwrap(),
 337                                                 inbound_payments.clone(),
 338                                                 channel_manager.clone(),
 339                                                 keys_manager.clone(),
 340                                                 network,
 341                                         );
 342                                 }
 343                                 "connectpeer" => {
 344                                         let peer_pubkey_and_ip_addr = words.next();
 345                                         if peer_pubkey_and_ip_addr.is_none() {
 346                                                 println!("ERROR: connectpeer requires peer connection info: `connectpeer pubkey@host:port`");
 347                                                 print!("> ");
 348                                                 io::stdout().flush().unwrap();
 349                                                 continue;
 350                                         }
 351                                         let (pubkey, peer_addr) =
 352                                                 match parse_peer_info(peer_pubkey_and_ip_addr.unwrap().to_string()) {
 353                                                         Ok(info) => info,
 354                                                         Err(e) => {
 355                                                                 println!("{:?}", e.into_inner().unwrap());
 356                                                                 print!("> ");
 357                                                                 io::stdout().flush().unwrap();
 358                                                                 continue;
 359                                                         }
 360                                                 };
 361                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 362                                                 .await
 363                                                 .is_ok()
 364                                         {
 365                                                 println!("SUCCESS: connected to peer {}", pubkey);
 366                                         }
 367                                 }
 368                                 "listchannels" => list_channels(channel_manager.clone()),
 369                                 "listpayments" => {
 370                                         list_payments(inbound_payments.clone(), outbound_payments.clone())
 371                                 }
 372                                 "closechannel" => {
 373                                         let channel_id_str = words.next();
 374                                         if channel_id_str.is_none() {
 375                                                 println!("ERROR: closechannel requires a channel ID: `closechannel <channel_id>`");
 376                                                 print!("> ");
 377                                                 io::stdout().flush().unwrap();
 378                                                 continue;
 379                                         }
 380                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 381                                         if channel_id_vec.is_none() {
 382                                                 println!("ERROR: couldn't parse channel_id as hex");
 383                                                 print!("> ");
 384                                                 io::stdout().flush().unwrap();
 385                                                 continue;
 386                                         }
 387                                         let mut channel_id = [0; 32];
 388                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 389                                         close_channel(channel_id, channel_manager.clone());
 390                                 }
 391                                 "forceclosechannel" => {
 392                                         let channel_id_str = words.next();
 393                                         if channel_id_str.is_none() {
 394                                                 println!("ERROR: forceclosechannel requires a channel ID: `forceclosechannel <channel_id>`");
 395                                                 print!("> ");
 396                                                 io::stdout().flush().unwrap();
 397                                                 continue;
 398                                         }
 399                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 400                                         if channel_id_vec.is_none() {
 401                                                 println!("ERROR: couldn't parse channel_id as hex");
 402                                                 print!("> ");
 403                                                 io::stdout().flush().unwrap();
 404                                                 continue;
 405                                         }
 406                                         let mut channel_id = [0; 32];
 407                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 408                                         force_close_channel(channel_id, channel_manager.clone());
 409                                 }
 410                                 "nodeinfo" => node_info(channel_manager.clone(), peer_manager.clone()),
 411                                 "listpeers" => list_peers(peer_manager.clone()),
 412                                 "signmessage" => {
 413                                         const MSG_STARTPOS: usize = "signmsg".len() + 1;
 414                                         if line.as_bytes().len() <= MSG_STARTPOS {
 415                                                 println!("ERROR: signmsg requires a message");
 416                                                 print!("> ");
 417                                                 io::stdout().flush().unwrap();
 418                                                 continue;
 419                                         }
 420                                         println!(
 421                                                 "{:?}",
 422                                                 lightning::util::message_signing::sign(
 423                                                         &line.as_bytes()[MSG_STARTPOS..],
 424                                                         &keys_manager.get_node_secret()
 425                                                 )
 426                                         );
 427                                         print!("> ");
 428                                         io::stdout().flush().unwrap();
 429                                 }
 430                                 _ => println!("Unknown command. See `\"help\" for available commands."),
 431                         }
 432                 }
 433                 print!("> ");
 434                 io::stdout().flush().unwrap();
 435         }
 436 }
 437
 438 fn help() {
 439         println!("openchannel pubkey@host:port <amt_satoshis>");
 440         println!("sendpayment <invoice>");
 441         println!("getinvoice <amt_millisatoshis>");
 442         println!("connectpeer pubkey@host:port");
 443         println!("listchannels");
 444         println!("listpayments");
 445         println!("closechannel <channel_id>");
 446         println!("forceclosechannel <channel_id>");
 447         println!("nodeinfo");
 448         println!("listpeers");
 449         println!("signmessage <message>");
 450 }
 451
 452 fn node_info(channel_manager: Arc<ChannelManager>, peer_manager: Arc<PeerManager>) {
 453         println!("\t{{");
 454         println!("\t\t node_pubkey: {}", channel_manager.get_our_node_id());
 455         println!("\t\t num_channels: {}", channel_manager.list_channels().len());
 456         println!("\t\t num_usable_channels: {}", channel_manager.list_usable_channels().len());
 457         println!("\t\t num_peers: {}", peer_manager.get_peer_node_ids().len());
 458         println!("\t}},");
 459 }
 460
 461 fn list_peers(peer_manager: Arc<PeerManager>) {
 462         println!("\t{{");
 463         for pubkey in peer_manager.get_peer_node_ids() {
 464                 println!("\t\t pubkey: {}", pubkey);
 465         }
 466         println!("\t}},");
 467 }
 468
 469 fn list_channels(channel_manager: Arc<ChannelManager>) {
 470         print!("[");
 471         for chan_info in channel_manager.list_channels() {
 472                 println!("");
 473                 println!("\t{{");
 474                 println!("\t\tchannel_id: {},", hex_utils::hex_str(&chan_info.channel_id[..]));
 475                 if let Some(funding_txo) = chan_info.funding_txo {
 476                         println!("\t\tfunding_txid: {},", funding_txo.txid);
 477                 }
 478                 println!(
 479                         "\t\tpeer_pubkey: {},",
 480                         hex_utils::hex_str(&chan_info.counterparty.node_id.serialize())
 481                 );
 482                 if let Some(id) = chan_info.short_channel_id {
 483                         println!("\t\tshort_channel_id: {},", id);
 484                 }
 485                 println!("\t\tis_confirmed_onchain: {},", chan_info.is_funding_locked);
 486                 println!("\t\tchannel_value_satoshis: {},", chan_info.channel_value_satoshis);
 487                 println!(
 488                         "\t\tlocal_balance_msat: {},",
 489                         chan_info.outbound_capacity_msat
 490                                 + chan_info.unspendable_punishment_reserve.unwrap_or(0) * 1000
 491                 );
 492                 if chan_info.is_usable {
 493                         println!("\t\tavailable_balance_for_send_msat: {},", chan_info.outbound_capacity_msat);
 494                         println!("\t\tavailable_balance_for_recv_msat: {},", chan_info.inbound_capacity_msat);
 495                 }
 496                 println!("\t\tchannel_can_send_payments: {},", chan_info.is_usable);
 497                 println!("\t\tpublic: {},", chan_info.is_public);
 498                 println!("\t}},");
 499         }
 500         println!("]");
 501 }
 502
 503 fn list_payments(inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage) {
 504         let inbound = inbound_payments.lock().unwrap();
 505         let outbound = outbound_payments.lock().unwrap();
 506         print!("[");
 507         for (payment_hash, payment_info) in inbound.deref() {
 508                 println!("");
 509                 println!("\t{{");
 510                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 511                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 512                 println!("\t\thtlc_direction: inbound,");
 513                 println!(
 514                         "\t\thtlc_status: {},",
 515                         match payment_info.status {
 516                                 HTLCStatus::Pending => "pending",
 517                                 HTLCStatus::Succeeded => "succeeded",
 518                                 HTLCStatus::Failed => "failed",
 519                         }
 520                 );
 521
 522                 println!("\t}},");
 523         }
 524
 525         for (payment_hash, payment_info) in outbound.deref() {
 526                 println!("");
 527                 println!("\t{{");
 528                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 529                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 530                 println!("\t\thtlc_direction: outbound,");
 531                 println!(
 532                         "\t\thtlc_status: {},",
 533                         match payment_info.status {
 534                                 HTLCStatus::Pending => "pending",
 535                                 HTLCStatus::Succeeded => "succeeded",
 536                                 HTLCStatus::Failed => "failed",
 537                         }
 538                 );
 539
 540                 println!("\t}},");
 541         }
 542         println!("]");
 543 }
 544
 545 pub(crate) async fn connect_peer_if_necessary(
 546         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 547 ) -> Result<(), ()> {
 548         for node_pubkey in peer_manager.get_peer_node_ids() {
 549                 if node_pubkey == pubkey {
 550                         return Ok(());
 551                 }
 552         }
 553         match lightning_net_tokio::connect_outbound(Arc::clone(&peer_manager), pubkey, peer_addr).await
 554         {
 555                 Some(connection_closed_future) => {
 556                         let mut connection_closed_future = Box::pin(connection_closed_future);
 557                         loop {
 558                                 match futures::poll!(&mut connection_closed_future) {
 559                                         std::task::Poll::Ready(_) => {
 560                                                 println!("ERROR: Peer disconnected before we finished the handshake");
 561                                                 return Err(());
 562                                         }
 563                                         std::task::Poll::Pending => {}
 564                                 }
 565                                 // Avoid blocking the tokio context by sleeping a bit
 566                                 match peer_manager.get_peer_node_ids().iter().find(|id| **id == pubkey) {
 567                                         Some(_) => break,
 568                                         None => tokio::time::sleep(Duration::from_millis(10)).await,
 569                                 }
 570                         }
 571                 }
 572                 None => {
 573                         println!("ERROR: failed to connect to peer");
 574                         return Err(());
 575                 }
 576         }
 577         Ok(())
 578 }
 579
 580 fn open_channel(
 581         peer_pubkey: PublicKey, channel_amt_sat: u64, announced_channel: bool,
 582         channel_manager: Arc<ChannelManager>,
 583 ) -> Result<(), ()> {
 584         let config = UserConfig {
 585                 peer_channel_config_limits: ChannelHandshakeLimits {
 586                         // lnd's max to_self_delay is 2016, so we want to be compatible.
 587                         their_to_self_delay: 2016,
 588                         ..Default::default()
 589                 },
 590                 channel_options: ChannelConfig { announced_channel, ..Default::default() },
 591                 ..Default::default()
 592         };
 593
 594         match channel_manager.create_channel(peer_pubkey, channel_amt_sat, 0, 0, Some(config)) {
 595                 Ok(_) => {
 596                         println!("EVENT: initiated channel with peer {}. ", peer_pubkey);
 597                         return Ok(());
 598                 }
 599                 Err(e) => {
 600                         println!("ERROR: failed to open channel: {:?}", e);
 601                         return Err(());
 602                 }
 603         }
 604 }
 605
 606 fn send_payment(
 607         payee_pubkey: PublicKey, amt_msat: u64, final_cltv: u32, payment_hash: PaymentHash,
 608         payment_secret: Option<PaymentSecret>, payee_features: Option<InvoiceFeatures>,
 609         route_hints: Vec<RouteHint>, network_graph: Arc<NetworkGraph>,
 610         channel_manager: Arc<ChannelManager>, payment_storage: PaymentInfoStorage,
 611         logger: Arc<FilesystemLogger>,
 612 ) {
 613         let first_hops = channel_manager.list_usable_channels();
 614         let payer_pubkey = channel_manager.get_our_node_id();
 615
 616         let mut payee = Payee::from_node_id(payee_pubkey).with_route_hints(route_hints);
 617         if let Some(features) = payee_features {
 618                 payee = payee.with_features(features);
 619         }
 620         let params =
 621                 RouteParameters { payee, final_value_msat: amt_msat, final_cltv_expiry_delta: final_cltv };
 622
 623         let route = router::find_route(
 624                 &payer_pubkey,
 625                 &params,
 626                 &network_graph,
 627                 Some(&first_hops.iter().collect::<Vec<_>>()),
 628                 logger,
 629                 &Scorer::default(),
 630         );
 631         if let Err(e) = route {
 632                 println!("ERROR: failed to find route: {}", e.err);
 633                 return;
 634         }
 635         let status = match channel_manager.send_payment(&route.unwrap(), payment_hash, &payment_secret)
 636         {
 637                 Ok(_payment_id) => {
 638                         println!("EVENT: initiated sending {} msats to {}", amt_msat, payee_pubkey);
 639                         HTLCStatus::Pending
 640                 }
 641                 Err(e) => {
 642                         println!("ERROR: failed to send payment: {:?}", e);
 643                         HTLCStatus::Failed
 644                 }
 645         };
 646         let mut payments = payment_storage.lock().unwrap();
 647         payments.insert(
 648                 payment_hash,
 649                 PaymentInfo {
 650                         preimage: None,
 651                         secret: payment_secret,
 652                         status,
 653                         amt_msat: MillisatAmount(Some(amt_msat)),
 654                 },
 655         );
 656 }
 657
 658 fn keysend(
 659         payee_pubkey: PublicKey, amt_msat: u64, network_graph: Arc<NetworkGraph>,
 660         channel_manager: Arc<ChannelManager>, payment_storage: PaymentInfoStorage,
 661         logger: Arc<FilesystemLogger>,
 662 ) {
 663         let first_hops = channel_manager.list_usable_channels();
 664         let payer_pubkey = channel_manager.get_our_node_id();
 665
 666         let payee = Payee::for_keysend(payee_pubkey);
 667         let params = RouteParameters { payee, final_value_msat: amt_msat, final_cltv_expiry_delta: 40 };
 668
 669         let route = match router::find_route(
 670                 &payer_pubkey,
 671                 &params,
 672                 &network_graph,
 673                 Some(&first_hops.iter().collect::<Vec<_>>()),
 674                 logger,
 675                 &Scorer::default(),
 676         ) {
 677                 Ok(r) => r,
 678                 Err(e) => {
 679                         println!("ERROR: failed to find route: {}", e.err);
 680                         return;
 681                 }
 682         };
 683
 684         let mut payments = payment_storage.lock().unwrap();
 685         let payment_hash = channel_manager.send_spontaneous_payment(&route, None).unwrap().0;
 686         payments.insert(
 687                 payment_hash,
 688                 PaymentInfo {
 689                         preimage: None,
 690                         secret: None,
 691                         status: HTLCStatus::Pending,
 692                         amt_msat: MillisatAmount(Some(amt_msat)),
 693                 },
 694         );
 695 }
 696
 697 fn get_invoice(
 698         amt_msat: u64, payment_storage: PaymentInfoStorage, channel_manager: Arc<ChannelManager>,
 699         keys_manager: Arc<KeysManager>, network: Network,
 700 ) {
 701         let mut payments = payment_storage.lock().unwrap();
 702         let currency = match network {
 703                 Network::Bitcoin => Currency::Bitcoin,
 704                 Network::Testnet => Currency::BitcoinTestnet,
 705                 Network::Regtest => Currency::Regtest,
 706                 Network::Signet => panic!("Signet unsupported"),
 707         };
 708         let invoice = match utils::create_invoice_from_channelmanager(
 709                 &channel_manager,
 710                 keys_manager,
 711                 currency,
 712                 Some(amt_msat),
 713                 "ldk-tutorial-node".to_string(),
 714         ) {
 715                 Ok(inv) => {
 716                         println!("SUCCESS: generated invoice: {}", inv);
 717                         inv
 718                 }
 719                 Err(e) => {
 720                         println!("ERROR: failed to create invoice: {:?}", e);
 721                         return;
 722                 }
 723         };
 724
 725         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 726         payments.insert(
 727                 payment_hash,
 728                 PaymentInfo {
 729                         preimage: None,
 730                         secret: Some(invoice.payment_secret().clone()),
 731                         status: HTLCStatus::Pending,
 732                         amt_msat: MillisatAmount(Some(amt_msat)),
 733                 },
 734         );
 735 }
 736
 737 fn close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 738         match channel_manager.close_channel(&channel_id) {
 739                 Ok(()) => println!("EVENT: initiating channel close"),
 740                 Err(e) => println!("ERROR: failed to close channel: {:?}", e),
 741         }
 742 }
 743
 744 fn force_close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 745         match channel_manager.force_close_channel(&channel_id) {
 746                 Ok(()) => println!("EVENT: initiating channel force-close"),
 747                 Err(e) => println!("ERROR: failed to force-close channel: {:?}", e),
 748         }
 749 }
 750
 751 pub(crate) fn parse_peer_info(
 752         peer_pubkey_and_ip_addr: String,
 753 ) -> Result<(PublicKey, SocketAddr), std::io::Error> {
 754         let mut pubkey_and_addr = peer_pubkey_and_ip_addr.split("@");
 755         let pubkey = pubkey_and_addr.next();
 756         let peer_addr_str = pubkey_and_addr.next();
 757         if peer_addr_str.is_none() || peer_addr_str.is_none() {
 758                 return Err(std::io::Error::new(
 759                         std::io::ErrorKind::Other,
 760                         "ERROR: incorrectly formatted peer info. Should be formatted as: `pubkey@host:port`",
 761                 ));
 762         }
 763
 764         let peer_addr = peer_addr_str.unwrap().to_socket_addrs().map(|mut r| r.next());
 765         if peer_addr.is_err() || peer_addr.as_ref().unwrap().is_none() {
 766                 return Err(std::io::Error::new(
 767                         std::io::ErrorKind::Other,
 768                         "ERROR: couldn't parse pubkey@host:port into a socket address",
 769                 ));
 770         }
 771
 772         let pubkey = hex_utils::to_compressed_pubkey(pubkey.unwrap());
 773         if pubkey.is_none() {
 774                 return Err(std::io::Error::new(
 775                         std::io::ErrorKind::Other,
 776                         "ERROR: unable to parse given pubkey for node",
 777                 ));
 778         }
 779
 780         Ok((pubkey.unwrap(), peer_addr.unwrap().unwrap()))
 781 }