_ 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;
  11 use lightning::chain::keysinterface::KeysManager;
  12 use lightning::ln::features::InvoiceFeatures;
  13 use lightning::ln::msgs::NetAddress;
  14 use lightning::ln::{PaymentHash, PaymentSecret};
  15 use lightning::routing::network_graph::NetGraphMsgHandler;
  16 use lightning::routing::router;
  17 use lightning::routing::router::RouteHint;
  18 use lightning::routing::scorer::Scorer;
  19 use lightning::util::config::{ChannelConfig, ChannelHandshakeLimits, UserConfig};
  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;
  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.split("@").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[0].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[1].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(
 144         peer_manager: Arc<PeerManager>, channel_manager: Arc<ChannelManager>,
 145         keys_manager: Arc<KeysManager>,
 146         router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access + Send + Sync>, Arc<FilesystemLogger>>>,
 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                                         let last_hops = invoice.route_hints();
 246
 247                                         let amt_pico_btc = invoice.amount_pico_btc();
 248                                         if amt_pico_btc.is_none() {
 249                                                 println!("ERROR: invalid invoice: must contain amount to pay");
 250                                                 print!("> ");
 251                                                 io::stdout().flush().unwrap();
 252                                                 continue;
 253                                         }
 254                                         let amt_msat = amt_pico_btc.unwrap() / 10;
 255
 256                                         let payee_pubkey = invoice.recover_payee_pub_key();
 257                                         let final_cltv = invoice.min_final_cltv_expiry() as u32;
 258                                         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 259                                         let payment_secret = Some(invoice.payment_secret().clone());
 260                                         let invoice_features = invoice.features().cloned();
 261
 262                                         send_payment(
 263                                                 payee_pubkey,
 264                                                 amt_msat,
 265                                                 final_cltv,
 266                                                 payment_hash,
 267                                                 payment_secret,
 268                                                 invoice_features,
 269                                                 last_hops,
 270                                                 router.clone(),
 271                                                 channel_manager.clone(),
 272                                                 outbound_payments.clone(),
 273                                                 logger.clone(),
 274                                         );
 275                                 }
 276                                 "keysend" => {
 277                                         let dest_pubkey = match words.next() {
 278                                                 Some(dest) => match hex_utils::to_compressed_pubkey(dest) {
 279                                                         Some(pk) => pk,
 280                                                         None => {
 281                                                                 println!("ERROR: couldn't parse destination pubkey");
 282                                                                 print!("> ");
 283                                                                 io::stdout().flush().unwrap();
 284                                                                 continue;
 285                                                         }
 286                                                 },
 287                                                 None => {
 288                                                         println!("ERROR: keysend requires a destination pubkey: `keysend <dest_pubkey> <amt_msat>`");
 289                                                         print!("> ");
 290                                                         io::stdout().flush().unwrap();
 291                                                         continue;
 292                                                 }
 293                                         };
 294                                         let amt_msat_str = match words.next() {
 295                                                 Some(amt) => amt,
 296                                                 None => {
 297                                                         println!("ERROR: keysend requires an amount in millisatoshis: `keysend <dest_pubkey> <amt_msat>`");
 298
 299                                                         print!("> ");
 300                                                         io::stdout().flush().unwrap();
 301                                                         continue;
 302                                                 }
 303                                         };
 304                                         let amt_msat: u64 = match amt_msat_str.parse() {
 305                                                 Ok(amt) => amt,
 306                                                 Err(e) => {
 307                                                         println!("ERROR: couldn't parse amount_msat: {}", e);
 308                                                         print!("> ");
 309                                                         io::stdout().flush().unwrap();
 310                                                         continue;
 311                                                 }
 312                                         };
 313                                         keysend(
 314                                                 dest_pubkey,
 315                                                 amt_msat,
 316                                                 router.clone(),
 317                                                 channel_manager.clone(),
 318                                                 outbound_payments.clone(),
 319                                                 logger.clone(),
 320                                         );
 321                                 }
 322                                 "getinvoice" => {
 323                                         let amt_str = words.next();
 324                                         if amt_str.is_none() {
 325                                                 println!("ERROR: getinvoice requires an amount in millisatoshis");
 326                                                 print!("> ");
 327                                                 io::stdout().flush().unwrap();
 328                                                 continue;
 329                                         }
 330
 331                                         let amt_msat: Result<u64, _> = amt_str.unwrap().parse();
 332                                         if amt_msat.is_err() {
 333                                                 println!("ERROR: getinvoice provided payment amount was not a number");
 334                                                 print!("> ");
 335                                                 io::stdout().flush().unwrap();
 336                                                 continue;
 337                                         }
 338                                         get_invoice(
 339                                                 amt_msat.unwrap(),
 340                                                 inbound_payments.clone(),
 341                                                 channel_manager.clone(),
 342                                                 keys_manager.clone(),
 343                                                 network,
 344                                         );
 345                                 }
 346                                 "connectpeer" => {
 347                                         let peer_pubkey_and_ip_addr = words.next();
 348                                         if peer_pubkey_and_ip_addr.is_none() {
 349                                                 println!("ERROR: connectpeer requires peer connection info: `connectpeer pubkey@host:port`");
 350                                                 print!("> ");
 351                                                 io::stdout().flush().unwrap();
 352                                                 continue;
 353                                         }
 354                                         let (pubkey, peer_addr) =
 355                                                 match parse_peer_info(peer_pubkey_and_ip_addr.unwrap().to_string()) {
 356                                                         Ok(info) => info,
 357                                                         Err(e) => {
 358                                                                 println!("{:?}", e.into_inner().unwrap());
 359                                                                 print!("> ");
 360                                                                 io::stdout().flush().unwrap();
 361                                                                 continue;
 362                                                         }
 363                                                 };
 364                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 365                                                 .await
 366                                                 .is_ok()
 367                                         {
 368                                                 println!("SUCCESS: connected to peer {}", pubkey);
 369                                         }
 370                                 }
 371                                 "listchannels" => list_channels(channel_manager.clone()),
 372                                 "listpayments" => {
 373                                         list_payments(inbound_payments.clone(), outbound_payments.clone())
 374                                 }
 375                                 "closechannel" => {
 376                                         let channel_id_str = words.next();
 377                                         if channel_id_str.is_none() {
 378                                                 println!("ERROR: closechannel requires a channel ID: `closechannel <channel_id>`");
 379                                                 print!("> ");
 380                                                 io::stdout().flush().unwrap();
 381                                                 continue;
 382                                         }
 383                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 384                                         if channel_id_vec.is_none() {
 385                                                 println!("ERROR: couldn't parse channel_id as hex");
 386                                                 print!("> ");
 387                                                 io::stdout().flush().unwrap();
 388                                                 continue;
 389                                         }
 390                                         let mut channel_id = [0; 32];
 391                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 392                                         close_channel(channel_id, channel_manager.clone());
 393                                 }
 394                                 "forceclosechannel" => {
 395                                         let channel_id_str = words.next();
 396                                         if channel_id_str.is_none() {
 397                                                 println!("ERROR: forceclosechannel requires a channel ID: `forceclosechannel <channel_id>`");
 398                                                 print!("> ");
 399                                                 io::stdout().flush().unwrap();
 400                                                 continue;
 401                                         }
 402                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 403                                         if channel_id_vec.is_none() {
 404                                                 println!("ERROR: couldn't parse channel_id as hex");
 405                                                 print!("> ");
 406                                                 io::stdout().flush().unwrap();
 407                                                 continue;
 408                                         }
 409                                         let mut channel_id = [0; 32];
 410                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 411                                         force_close_channel(channel_id, channel_manager.clone());
 412                                 }
 413                                 "nodeinfo" => node_info(channel_manager.clone(), peer_manager.clone()),
 414                                 "listpeers" => list_peers(peer_manager.clone()),
 415                                 _ => println!("Unknown command. See `\"help\" for available commands."),
 416                         }
 417                 }
 418                 print!("> ");
 419                 io::stdout().flush().unwrap();
 420         }
 421 }
 422
 423 fn help() {
 424         println!("openchannel pubkey@host:port <amt_satoshis>");
 425         println!("sendpayment <invoice>");
 426         println!("getinvoice <amt_millisatoshis>");
 427         println!("connectpeer pubkey@host:port");
 428         println!("listchannels");
 429         println!("listpayments");
 430         println!("closechannel <channel_id>");
 431         println!("forceclosechannel <channel_id>");
 432         println!("nodeinfo");
 433         println!("listpeers");
 434 }
 435
 436 fn node_info(channel_manager: Arc<ChannelManager>, peer_manager: Arc<PeerManager>) {
 437         println!("\t{{");
 438         println!("\t\t node_pubkey: {}", channel_manager.get_our_node_id());
 439         println!("\t\t num_channels: {}", channel_manager.list_channels().len());
 440         println!("\t\t num_usable_channels: {}", channel_manager.list_usable_channels().len());
 441         println!("\t\t num_peers: {}", peer_manager.get_peer_node_ids().len());
 442         println!("\t}},");
 443 }
 444
 445 fn list_peers(peer_manager: Arc<PeerManager>) {
 446         println!("\t{{");
 447         for pubkey in peer_manager.get_peer_node_ids() {
 448                 println!("\t\t pubkey: {}", pubkey);
 449         }
 450         println!("\t}},");
 451 }
 452
 453 fn list_channels(channel_manager: Arc<ChannelManager>) {
 454         print!("[");
 455         for chan_info in channel_manager.list_channels() {
 456                 println!("");
 457                 println!("\t{{");
 458                 println!("\t\tchannel_id: {},", hex_utils::hex_str(&chan_info.channel_id[..]));
 459                 if let Some(funding_txo) = chan_info.funding_txo {
 460                         println!("\t\tfunding_txid: {},", funding_txo.txid);
 461                 }
 462                 println!(
 463                         "\t\tpeer_pubkey: {},",
 464                         hex_utils::hex_str(&chan_info.counterparty.node_id.serialize())
 465                 );
 466                 if let Some(id) = chan_info.short_channel_id {
 467                         println!("\t\tshort_channel_id: {},", id);
 468                 }
 469                 println!("\t\tis_confirmed_onchain: {},", chan_info.is_funding_locked);
 470                 println!("\t\tchannel_value_satoshis: {},", chan_info.channel_value_satoshis);
 471                 println!(
 472                         "\t\tlocal_balance_msat: {},",
 473                         chan_info.outbound_capacity_msat
 474                                 + chan_info.unspendable_punishment_reserve.unwrap_or(0) * 1000
 475                 );
 476                 if chan_info.is_usable {
 477                         println!("\t\tavailable_balance_for_send_msat: {},", chan_info.outbound_capacity_msat);
 478                         println!("\t\tavailable_balance_for_recv_msat: {},", chan_info.inbound_capacity_msat);
 479                 }
 480                 println!("\t\tchannel_can_send_payments: {},", chan_info.is_usable);
 481                 println!("\t\tpublic: {},", chan_info.is_public);
 482                 println!("\t}},");
 483         }
 484         println!("]");
 485 }
 486
 487 fn list_payments(inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage) {
 488         let inbound = inbound_payments.lock().unwrap();
 489         let outbound = outbound_payments.lock().unwrap();
 490         print!("[");
 491         for (payment_hash, payment_info) in inbound.deref() {
 492                 println!("");
 493                 println!("\t{{");
 494                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 495                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 496                 println!("\t\thtlc_direction: inbound,");
 497                 println!(
 498                         "\t\thtlc_status: {},",
 499                         match payment_info.status {
 500                                 HTLCStatus::Pending => "pending",
 501                                 HTLCStatus::Succeeded => "succeeded",
 502                                 HTLCStatus::Failed => "failed",
 503                         }
 504                 );
 505
 506                 println!("\t}},");
 507         }
 508
 509         for (payment_hash, payment_info) in outbound.deref() {
 510                 println!("");
 511                 println!("\t{{");
 512                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 513                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 514                 println!("\t\thtlc_direction: outbound,");
 515                 println!(
 516                         "\t\thtlc_status: {},",
 517                         match payment_info.status {
 518                                 HTLCStatus::Pending => "pending",
 519                                 HTLCStatus::Succeeded => "succeeded",
 520                                 HTLCStatus::Failed => "failed",
 521                         }
 522                 );
 523
 524                 println!("\t}},");
 525         }
 526         println!("]");
 527 }
 528
 529 pub(crate) async fn connect_peer_if_necessary(
 530         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 531 ) -> Result<(), ()> {
 532         for node_pubkey in peer_manager.get_peer_node_ids() {
 533                 if node_pubkey == pubkey {
 534                         return Ok(());
 535                 }
 536         }
 537         match lightning_net_tokio::connect_outbound(Arc::clone(&peer_manager), pubkey, peer_addr).await
 538         {
 539                 Some(connection_closed_future) => {
 540                         let mut connection_closed_future = Box::pin(connection_closed_future);
 541                         loop {
 542                                 match futures::poll!(&mut connection_closed_future) {
 543                                         std::task::Poll::Ready(_) => {
 544                                                 println!("ERROR: Peer disconnected before we finished the handshake");
 545                                                 return Err(());
 546                                         }
 547                                         std::task::Poll::Pending => {}
 548                                 }
 549                                 // Avoid blocking the tokio context by sleeping a bit
 550                                 match peer_manager.get_peer_node_ids().iter().find(|id| **id == pubkey) {
 551                                         Some(_) => break,
 552                                         None => tokio::time::sleep(Duration::from_millis(10)).await,
 553                                 }
 554                         }
 555                 }
 556                 None => {
 557                         println!("ERROR: failed to connect to peer");
 558                         return Err(());
 559                 }
 560         }
 561         Ok(())
 562 }
 563
 564 fn open_channel(
 565         peer_pubkey: PublicKey, channel_amt_sat: u64, announced_channel: bool,
 566         channel_manager: Arc<ChannelManager>,
 567 ) -> Result<(), ()> {
 568         let config = UserConfig {
 569                 peer_channel_config_limits: ChannelHandshakeLimits {
 570                         // lnd's max to_self_delay is 2016, so we want to be compatible.
 571                         their_to_self_delay: 2016,
 572                         ..Default::default()
 573                 },
 574                 channel_options: ChannelConfig { announced_channel, ..Default::default() },
 575                 ..Default::default()
 576         };
 577
 578         match channel_manager.create_channel(peer_pubkey, channel_amt_sat, 0, 0, Some(config)) {
 579                 Ok(_) => {
 580                         println!("EVENT: initiated channel with peer {}. ", peer_pubkey);
 581                         return Ok(());
 582                 }
 583                 Err(e) => {
 584                         println!("ERROR: failed to open channel: {:?}", e);
 585                         return Err(());
 586                 }
 587         }
 588 }
 589
 590 fn send_payment(
 591         payee: PublicKey, amt_msat: u64, final_cltv: u32, payment_hash: PaymentHash,
 592         payment_secret: Option<PaymentSecret>, payee_features: Option<InvoiceFeatures>,
 593         route_hints: Vec<&RouteHint>,
 594         router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access + Send + Sync>, Arc<FilesystemLogger>>>,
 595         channel_manager: Arc<ChannelManager>, payment_storage: PaymentInfoStorage,
 596         logger: Arc<FilesystemLogger>,
 597 ) {
 598         let network_graph = &router.network_graph;
 599         let first_hops = channel_manager.list_usable_channels();
 600         let payer_pubkey = channel_manager.get_our_node_id();
 601
 602         let route = router::get_route(
 603                 &payer_pubkey,
 604                 &network_graph,
 605                 &payee,
 606                 payee_features,
 607                 Some(&first_hops.iter().collect::<Vec<_>>()),
 608                 &route_hints,
 609                 amt_msat,
 610                 final_cltv,
 611                 logger,
 612                 &Scorer::default(),
 613         );
 614         if let Err(e) = route {
 615                 println!("ERROR: failed to find route: {}", e.err);
 616                 return;
 617         }
 618         let status = match channel_manager.send_payment(&route.unwrap(), payment_hash, &payment_secret)
 619         {
 620                 Ok(_payment_id) => {
 621                         println!("EVENT: initiated sending {} msats to {}", amt_msat, payee);
 622                         HTLCStatus::Pending
 623                 }
 624                 Err(e) => {
 625                         println!("ERROR: failed to send payment: {:?}", e);
 626                         HTLCStatus::Failed
 627                 }
 628         };
 629         let mut payments = payment_storage.lock().unwrap();
 630         payments.insert(
 631                 payment_hash,
 632                 PaymentInfo {
 633                         preimage: None,
 634                         secret: payment_secret,
 635                         status,
 636                         amt_msat: MillisatAmount(Some(amt_msat)),
 637                 },
 638         );
 639 }
 640
 641 fn keysend(
 642         payee: PublicKey, amt_msat: u64,
 643         router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access + Send + Sync>, Arc<FilesystemLogger>>>,
 644         channel_manager: Arc<ChannelManager>, payment_storage: PaymentInfoStorage,
 645         logger: Arc<FilesystemLogger>,
 646 ) {
 647         let network_graph = &router.network_graph;
 648         let first_hops = channel_manager.list_usable_channels();
 649         let payer_pubkey = channel_manager.get_our_node_id();
 650
 651         let route = match router::get_keysend_route(
 652                 &payer_pubkey,
 653                 &network_graph,
 654                 &payee,
 655                 Some(&first_hops.iter().collect::<Vec<_>>()),
 656                 &vec![],
 657                 amt_msat,
 658                 40,
 659                 logger,
 660                 &Scorer::default(),
 661         ) {
 662                 Ok(r) => r,
 663                 Err(e) => {
 664                         println!("ERROR: failed to find route: {}", e.err);
 665                         return;
 666                 }
 667         };
 668
 669         let mut payments = payment_storage.lock().unwrap();
 670         let payment_hash = channel_manager.send_spontaneous_payment(&route, None).unwrap().0;
 671         payments.insert(
 672                 payment_hash,
 673                 PaymentInfo {
 674                         preimage: None,
 675                         secret: None,
 676                         status: HTLCStatus::Pending,
 677                         amt_msat: MillisatAmount(Some(amt_msat)),
 678                 },
 679         );
 680 }
 681
 682 fn get_invoice(
 683         amt_msat: u64, payment_storage: PaymentInfoStorage, channel_manager: Arc<ChannelManager>,
 684         keys_manager: Arc<KeysManager>, network: Network,
 685 ) {
 686         let mut payments = payment_storage.lock().unwrap();
 687         let currency = match network {
 688                 Network::Bitcoin => Currency::Bitcoin,
 689                 Network::Testnet => Currency::BitcoinTestnet,
 690                 Network::Regtest => Currency::Regtest,
 691                 Network::Signet => panic!("Signet unsupported"),
 692         };
 693         let invoice = match utils::create_invoice_from_channelmanager(
 694                 &channel_manager,
 695                 keys_manager,
 696                 currency,
 697                 Some(amt_msat),
 698                 "ldk-tutorial-node".to_string(),
 699         ) {
 700                 Ok(inv) => {
 701                         println!("SUCCESS: generated invoice: {}", inv);
 702                         inv
 703                 }
 704                 Err(e) => {
 705                         println!("ERROR: failed to create invoice: {:?}", e);
 706                         return;
 707                 }
 708         };
 709
 710         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 711         payments.insert(
 712                 payment_hash,
 713                 PaymentInfo {
 714                         preimage: None,
 715                         secret: Some(invoice.payment_secret().clone()),
 716                         status: HTLCStatus::Pending,
 717                         amt_msat: MillisatAmount(Some(amt_msat)),
 718                 },
 719         );
 720 }
 721
 722 fn close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 723         match channel_manager.close_channel(&channel_id) {
 724                 Ok(()) => println!("EVENT: initiating channel close"),
 725                 Err(e) => println!("ERROR: failed to close channel: {:?}", e),
 726         }
 727 }
 728
 729 fn force_close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 730         match channel_manager.force_close_channel(&channel_id) {
 731                 Ok(()) => println!("EVENT: initiating channel force-close"),
 732                 Err(e) => println!("ERROR: failed to force-close channel: {:?}", e),
 733         }
 734 }
 735
 736 pub(crate) fn parse_peer_info(
 737         peer_pubkey_and_ip_addr: String,
 738 ) -> Result<(PublicKey, SocketAddr), std::io::Error> {
 739         let mut pubkey_and_addr = peer_pubkey_and_ip_addr.split("@");
 740         let pubkey = pubkey_and_addr.next();
 741         let peer_addr_str = pubkey_and_addr.next();
 742         if peer_addr_str.is_none() || peer_addr_str.is_none() {
 743                 return Err(std::io::Error::new(
 744                         std::io::ErrorKind::Other,
 745                         "ERROR: incorrectly formatted peer info. Should be formatted as: `pubkey@host:port`",
 746                 ));
 747         }
 748
 749         let peer_addr = peer_addr_str.unwrap().to_socket_addrs().map(|mut r| r.next());
 750         if peer_addr.is_err() || peer_addr.as_ref().unwrap().is_none() {
 751                 return Err(std::io::Error::new(
 752                         std::io::ErrorKind::Other,
 753                         "ERROR: couldn't parse pubkey@host:port into a socket address",
 754                 ));
 755         }
 756
 757         let pubkey = hex_utils::to_compressed_pubkey(pubkey.unwrap());
 758         if pubkey.is_none() {
 759                 return Err(std::io::Error::new(
 760                         std::io::ErrorKind::Other,
 761                         "ERROR: unable to parse given pubkey for node",
 762                 ));
 763         }
 764
 765         Ok((pubkey.unwrap(), peer_addr.unwrap().unwrap()))
 766 }