_ 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::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.split("@").collect();
  49         if bitcoind_rpc_info_parts.len() != 2 {
  50                 println!("ERROR: bad bitcoind RPC URL provided");
  51                 return Err(());
  52         }
  53         let rpc_user_and_password: Vec<&str> = bitcoind_rpc_info_parts[0].split(":").collect();
  54         if rpc_user_and_password.len() != 2 {
  55                 println!("ERROR: bad bitcoind RPC username/password combo provided");
  56                 return Err(());
  57         }
  58         let bitcoind_rpc_username = rpc_user_and_password[0].to_string();
  59         let bitcoind_rpc_password = rpc_user_and_password[1].to_string();
  60         let bitcoind_rpc_path: Vec<&str> = bitcoind_rpc_info_parts[1].split(":").collect();
  61         if bitcoind_rpc_path.len() != 2 {
  62                 println!("ERROR: bad bitcoind RPC path provided");
  63                 return Err(());
  64         }
  65         let bitcoind_rpc_host = bitcoind_rpc_path[0].to_string();
  66         let bitcoind_rpc_port = bitcoind_rpc_path[1].parse::<u16>().unwrap();
  67
  68         let ldk_storage_dir_path = env::args().skip(2).next().unwrap();
  69
  70         let mut ldk_peer_port_set = true;
  71         let ldk_peer_listening_port: u16 = match env::args().skip(3).next().map(|p| p.parse()) {
  72                 Some(Ok(p)) => p,
  73                 Some(Err(e)) => panic!("{}", e),
  74                 None => {
  75                         ldk_peer_port_set = false;
  76                         9735
  77                 }
  78         };
  79
  80         let mut arg_idx = match ldk_peer_port_set {
  81                 true => 4,
  82                 false => 3,
  83         };
  84         let network: Network = match env::args().skip(arg_idx).next().as_ref().map(String::as_str) {
  85                 Some("testnet") => Network::Testnet,
  86                 Some("regtest") => Network::Regtest,
  87                 Some(_) => panic!("Unsupported network provided. Options are: `regtest`, `testnet`"),
  88                 None => Network::Testnet,
  89         };
  90
  91         let ldk_announced_node_name = match env::args().skip(arg_idx + 1).next().as_ref() {
  92                 Some(s) => {
  93                         if s.len() > 32 {
  94                                 panic!("Node Alias can not be longer than 32 bytes");
  95                         }
  96                         arg_idx += 1;
  97                         let mut bytes = [0; 32];
  98                         bytes[..s.len()].copy_from_slice(s.as_bytes());
  99                         bytes
 100                 }
 101                 None => [0; 32],
 102         };
 103
 104         let mut ldk_announced_listen_addr = Vec::new();
 105         loop {
 106                 match env::args().skip(arg_idx + 1).next().as_ref() {
 107                         Some(s) => match IpAddr::from_str(s) {
 108                                 Ok(IpAddr::V4(a)) => {
 109                                         ldk_announced_listen_addr
 110                                                 .push(NetAddress::IPv4 { addr: a.octets(), port: ldk_peer_listening_port });
 111                                         arg_idx += 1;
 112                                 }
 113                                 Ok(IpAddr::V6(a)) => {
 114                                         ldk_announced_listen_addr
 115                                                 .push(NetAddress::IPv6 { addr: a.octets(), port: ldk_peer_listening_port });
 116                                         arg_idx += 1;
 117                                 }
 118                                 Err(_) => panic!("Failed to parse announced-listen-addr into an IP address"),
 119                         },
 120                         None => break,
 121                 }
 122         }
 123
 124         Ok(LdkUserInfo {
 125                 bitcoind_rpc_username,
 126                 bitcoind_rpc_password,
 127                 bitcoind_rpc_host,
 128                 bitcoind_rpc_port,
 129                 ldk_storage_dir_path,
 130                 ldk_peer_listening_port,
 131                 ldk_announced_listen_addr,
 132                 ldk_announced_node_name,
 133                 network,
 134         })
 135 }
 136
 137 pub(crate) async fn poll_for_user_input(
 138         peer_manager: Arc<PeerManager>, channel_manager: Arc<ChannelManager>,
 139         keys_manager: Arc<KeysManager>,
 140         router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access + Send + Sync>, Arc<FilesystemLogger>>>,
 141         inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage,
 142         ldk_data_dir: String, logger: Arc<FilesystemLogger>, network: Network,
 143 ) {
 144         println!("LDK startup successful. To view available commands: \"help\".");
 145         println!("LDK logs are available at <your-supplied-ldk-data-dir-path>/.ldk/logs");
 146         println!("Local Node ID is {}.", channel_manager.get_our_node_id());
 147         let stdin = io::stdin();
 148         print!("> ");
 149         io::stdout().flush().unwrap(); // Without flushing, the `>` doesn't print
 150         for line in stdin.lock().lines() {
 151                 let line = line.unwrap();
 152                 let mut words = line.split_whitespace();
 153                 if let Some(word) = words.next() {
 154                         match word {
 155                                 "help" => help(),
 156                                 "openchannel" => {
 157                                         let peer_pubkey_and_ip_addr = words.next();
 158                                         let channel_value_sat = words.next();
 159                                         if peer_pubkey_and_ip_addr.is_none() || channel_value_sat.is_none() {
 160                                                 println!("ERROR: openchannel has 2 required arguments: `openchannel pubkey@host:port channel_amt_satoshis` [--public]");
 161                                                 print!("> ");
 162                                                 io::stdout().flush().unwrap();
 163                                                 continue;
 164                                         }
 165                                         let peer_pubkey_and_ip_addr = peer_pubkey_and_ip_addr.unwrap();
 166                                         let (pubkey, peer_addr) =
 167                                                 match parse_peer_info(peer_pubkey_and_ip_addr.to_string()) {
 168                                                         Ok(info) => info,
 169                                                         Err(e) => {
 170                                                                 println!("{:?}", e.into_inner().unwrap());
 171                                                                 print!("> ");
 172                                                                 io::stdout().flush().unwrap();
 173                                                                 continue;
 174                                                         }
 175                                                 };
 176
 177                                         let chan_amt_sat: Result<u64, _> = channel_value_sat.unwrap().parse();
 178                                         if chan_amt_sat.is_err() {
 179                                                 println!("ERROR: channel amount must be a number");
 180                                                 print!("> ");
 181                                                 io::stdout().flush().unwrap();
 182                                                 continue;
 183                                         }
 184
 185                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 186                                                 .await
 187                                                 .is_err()
 188                                         {
 189                                                 print!("> ");
 190                                                 io::stdout().flush().unwrap();
 191                                                 continue;
 192                                         };
 193
 194                                         let announce_channel = match words.next() {
 195                                                 Some("--public") | Some("--public=true") => true,
 196                                                 Some("--public=false") => false,
 197                                                 Some(_) => {
 198                                                         println!("ERROR: invalid `--public` command format. Valid formats: `--public`, `--public=true` `--public=false`");
 199                                                         print!("> ");
 200                                                         io::stdout().flush().unwrap();
 201                                                         continue;
 202                                                 }
 203                                                 None => false,
 204                                         };
 205
 206                                         if open_channel(
 207                                                 pubkey,
 208                                                 chan_amt_sat.unwrap(),
 209                                                 announce_channel,
 210                                                 channel_manager.clone(),
 211                                         )
 212                                         .is_ok()
 213                                         {
 214                                                 let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
 215                                                 let _ = disk::persist_channel_peer(
 216                                                         Path::new(&peer_data_path),
 217                                                         peer_pubkey_and_ip_addr,
 218                                                 );
 219                                         }
 220                                 }
 221                                 "sendpayment" => {
 222                                         let invoice_str = words.next();
 223                                         if invoice_str.is_none() {
 224                                                 println!("ERROR: sendpayment requires an invoice: `sendpayment <invoice>`");
 225                                                 print!("> ");
 226                                                 io::stdout().flush().unwrap();
 227                                                 continue;
 228                                         }
 229
 230                                         let invoice = match Invoice::from_str(invoice_str.unwrap()) {
 231                                                 Ok(inv) => inv,
 232                                                 Err(e) => {
 233                                                         println!("ERROR: invalid invoice: {:?}", e);
 234                                                         print!("> ");
 235                                                         io::stdout().flush().unwrap();
 236                                                         continue;
 237                                                 }
 238                                         };
 239                                         let last_hops = invoice.route_hints();
 240
 241                                         let amt_pico_btc = invoice.amount_pico_btc();
 242                                         if amt_pico_btc.is_none() {
 243                                                 println!("ERROR: invalid invoice: must contain amount to pay");
 244                                                 print!("> ");
 245                                                 io::stdout().flush().unwrap();
 246                                                 continue;
 247                                         }
 248                                         let amt_msat = amt_pico_btc.unwrap() / 10;
 249
 250                                         let payee_pubkey = invoice.recover_payee_pub_key();
 251                                         let final_cltv = invoice.min_final_cltv_expiry() as u32;
 252                                         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 253                                         let payment_secret = invoice.payment_secret().cloned();
 254                                         let invoice_features = invoice.features().cloned();
 255
 256                                         send_payment(
 257                                                 payee_pubkey,
 258                                                 amt_msat,
 259                                                 final_cltv,
 260                                                 payment_hash,
 261                                                 payment_secret,
 262                                                 invoice_features,
 263                                                 last_hops,
 264                                                 router.clone(),
 265                                                 channel_manager.clone(),
 266                                                 outbound_payments.clone(),
 267                                                 logger.clone(),
 268                                         );
 269                                 }
 270                                 "keysend" => {
 271                                         let dest_pubkey = match words.next() {
 272                                                 Some(dest) => match hex_utils::to_compressed_pubkey(dest) {
 273                                                         Some(pk) => pk,
 274                                                         None => {
 275                                                                 println!("ERROR: couldn't parse destination pubkey");
 276                                                                 print!("> ");
 277                                                                 io::stdout().flush().unwrap();
 278                                                                 continue;
 279                                                         }
 280                                                 },
 281                                                 None => {
 282                                                         println!("ERROR: keysend requires a destination pubkey: `keysend <dest_pubkey> <amt_msat>`");
 283                                                         print!("> ");
 284                                                         io::stdout().flush().unwrap();
 285                                                         continue;
 286                                                 }
 287                                         };
 288                                         let amt_msat_str = match words.next() {
 289                                                 Some(amt) => amt,
 290                                                 None => {
 291                                                         println!("ERROR: keysend requires an amount in millisatoshis: `keysend <dest_pubkey> <amt_msat>`");
 292
 293                                                         print!("> ");
 294                                                         io::stdout().flush().unwrap();
 295                                                         continue;
 296                                                 }
 297                                         };
 298                                         let amt_msat: u64 = match amt_msat_str.parse() {
 299                                                 Ok(amt) => amt,
 300                                                 Err(e) => {
 301                                                         println!("ERROR: couldn't parse amount_msat: {}", e);
 302                                                         print!("> ");
 303                                                         io::stdout().flush().unwrap();
 304                                                         continue;
 305                                                 }
 306                                         };
 307                                         keysend(
 308                                                 dest_pubkey,
 309                                                 amt_msat,
 310                                                 router.clone(),
 311                                                 channel_manager.clone(),
 312                                                 outbound_payments.clone(),
 313                                                 logger.clone(),
 314                                         );
 315                                 }
 316                                 "getinvoice" => {
 317                                         let amt_str = words.next();
 318                                         if amt_str.is_none() {
 319                                                 println!("ERROR: getinvoice requires an amount in millisatoshis");
 320                                                 print!("> ");
 321                                                 io::stdout().flush().unwrap();
 322                                                 continue;
 323                                         }
 324
 325                                         let amt_msat: Result<u64, _> = amt_str.unwrap().parse();
 326                                         if amt_msat.is_err() {
 327                                                 println!("ERROR: getinvoice provided payment amount was not a number");
 328                                                 print!("> ");
 329                                                 io::stdout().flush().unwrap();
 330                                                 continue;
 331                                         }
 332                                         get_invoice(
 333                                                 amt_msat.unwrap(),
 334                                                 inbound_payments.clone(),
 335                                                 channel_manager.clone(),
 336                                                 keys_manager.clone(),
 337                                                 network,
 338                                         );
 339                                 }
 340                                 "connectpeer" => {
 341                                         let peer_pubkey_and_ip_addr = words.next();
 342                                         if peer_pubkey_and_ip_addr.is_none() {
 343                                                 println!("ERROR: connectpeer requires peer connection info: `connectpeer pubkey@host:port`");
 344                                                 print!("> ");
 345                                                 io::stdout().flush().unwrap();
 346                                                 continue;
 347                                         }
 348                                         let (pubkey, peer_addr) =
 349                                                 match parse_peer_info(peer_pubkey_and_ip_addr.unwrap().to_string()) {
 350                                                         Ok(info) => info,
 351                                                         Err(e) => {
 352                                                                 println!("{:?}", e.into_inner().unwrap());
 353                                                                 print!("> ");
 354                                                                 io::stdout().flush().unwrap();
 355                                                                 continue;
 356                                                         }
 357                                                 };
 358                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 359                                                 .await
 360                                                 .is_ok()
 361                                         {
 362                                                 println!("SUCCESS: connected to peer {}", pubkey);
 363                                         }
 364                                 }
 365                                 "listchannels" => list_channels(channel_manager.clone()),
 366                                 "listpayments" => {
 367                                         list_payments(inbound_payments.clone(), outbound_payments.clone())
 368                                 }
 369                                 "closechannel" => {
 370                                         let channel_id_str = words.next();
 371                                         if channel_id_str.is_none() {
 372                                                 println!("ERROR: closechannel requires a channel ID: `closechannel <channel_id>`");
 373                                                 print!("> ");
 374                                                 io::stdout().flush().unwrap();
 375                                                 continue;
 376                                         }
 377                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 378                                         if channel_id_vec.is_none() {
 379                                                 println!("ERROR: couldn't parse channel_id as hex");
 380                                                 print!("> ");
 381                                                 io::stdout().flush().unwrap();
 382                                                 continue;
 383                                         }
 384                                         let mut channel_id = [0; 32];
 385                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 386                                         close_channel(channel_id, channel_manager.clone());
 387                                 }
 388                                 "forceclosechannel" => {
 389                                         let channel_id_str = words.next();
 390                                         if channel_id_str.is_none() {
 391                                                 println!("ERROR: forceclosechannel requires a channel ID: `forceclosechannel <channel_id>`");
 392                                                 print!("> ");
 393                                                 io::stdout().flush().unwrap();
 394                                                 continue;
 395                                         }
 396                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 397                                         if channel_id_vec.is_none() {
 398                                                 println!("ERROR: couldn't parse channel_id as hex");
 399                                                 print!("> ");
 400                                                 io::stdout().flush().unwrap();
 401                                                 continue;
 402                                         }
 403                                         let mut channel_id = [0; 32];
 404                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 405                                         force_close_channel(channel_id, channel_manager.clone());
 406                                 }
 407                                 "nodeinfo" => node_info(channel_manager.clone(), peer_manager.clone()),
 408                                 "listpeers" => list_peers(peer_manager.clone()),
 409                                 _ => println!("Unknown command. See `\"help\" for available commands."),
 410                         }
 411                 }
 412                 print!("> ");
 413                 io::stdout().flush().unwrap();
 414         }
 415 }
 416
 417 fn help() {
 418         println!("openchannel pubkey@host:port <amt_satoshis>");
 419         println!("sendpayment <invoice>");
 420         println!("getinvoice <amt_millisatoshis>");
 421         println!("connectpeer pubkey@host:port");
 422         println!("listchannels");
 423         println!("listpayments");
 424         println!("closechannel <channel_id>");
 425         println!("forceclosechannel <channel_id>");
 426         println!("nodeinfo");
 427         println!("listpeers");
 428 }
 429
 430 fn node_info(channel_manager: Arc<ChannelManager>, peer_manager: Arc<PeerManager>) {
 431         println!("\t{{");
 432         println!("\t\t node_pubkey: {}", channel_manager.get_our_node_id());
 433         println!("\t\t num_channels: {}", channel_manager.list_channels().len());
 434         println!("\t\t num_usable_channels: {}", channel_manager.list_usable_channels().len());
 435         println!("\t\t num_peers: {}", peer_manager.get_peer_node_ids().len());
 436         println!("\t}},");
 437 }
 438
 439 fn list_peers(peer_manager: Arc<PeerManager>) {
 440         println!("\t{{");
 441         for pubkey in peer_manager.get_peer_node_ids() {
 442                 println!("\t\t pubkey: {}", pubkey);
 443         }
 444         println!("\t}},");
 445 }
 446
 447 fn list_channels(channel_manager: Arc<ChannelManager>) {
 448         print!("[");
 449         for chan_info in channel_manager.list_channels() {
 450                 println!("");
 451                 println!("\t{{");
 452                 println!("\t\tchannel_id: {},", hex_utils::hex_str(&chan_info.channel_id[..]));
 453                 if let Some(funding_txo) = chan_info.funding_txo {
 454                         println!("\t\tfunding_txid: {},", funding_txo.txid);
 455                 }
 456                 println!(
 457                         "\t\tpeer_pubkey: {},",
 458                         hex_utils::hex_str(&chan_info.counterparty.node_id.serialize())
 459                 );
 460                 if let Some(id) = chan_info.short_channel_id {
 461                         println!("\t\tshort_channel_id: {},", id);
 462                 }
 463                 println!("\t\tis_confirmed_onchain: {},", chan_info.is_funding_locked);
 464                 println!("\t\tchannel_value_satoshis: {},", chan_info.channel_value_satoshis);
 465                 if chan_info.is_usable {
 466                         println!("\t\tavailable_balance_for_send_msat: {},", chan_info.outbound_capacity_msat);
 467                         println!("\t\tavailable_balance_for_recv_msat: {},", chan_info.inbound_capacity_msat);
 468                 }
 469                 println!("\t\tchannel_can_send_payments: {},", chan_info.is_usable);
 470                 println!("\t\tpublic: {},", chan_info.is_public);
 471                 println!("\t}},");
 472         }
 473         println!("]");
 474 }
 475
 476 fn list_payments(inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage) {
 477         let inbound = inbound_payments.lock().unwrap();
 478         let outbound = outbound_payments.lock().unwrap();
 479         print!("[");
 480         for (payment_hash, payment_info) in inbound.deref() {
 481                 println!("");
 482                 println!("\t{{");
 483                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 484                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 485                 println!("\t\thtlc_direction: inbound,");
 486                 println!(
 487                         "\t\thtlc_status: {},",
 488                         match payment_info.status {
 489                                 HTLCStatus::Pending => "pending",
 490                                 HTLCStatus::Succeeded => "succeeded",
 491                                 HTLCStatus::Failed => "failed",
 492                         }
 493                 );
 494
 495                 println!("\t}},");
 496         }
 497
 498         for (payment_hash, payment_info) in outbound.deref() {
 499                 println!("");
 500                 println!("\t{{");
 501                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 502                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 503                 println!("\t\thtlc_direction: outbound,");
 504                 println!(
 505                         "\t\thtlc_status: {},",
 506                         match payment_info.status {
 507                                 HTLCStatus::Pending => "pending",
 508                                 HTLCStatus::Succeeded => "succeeded",
 509                                 HTLCStatus::Failed => "failed",
 510                         }
 511                 );
 512
 513                 println!("\t}},");
 514         }
 515         println!("]");
 516 }
 517
 518 pub(crate) async fn connect_peer_if_necessary(
 519         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 520 ) -> Result<(), ()> {
 521         for node_pubkey in peer_manager.get_peer_node_ids() {
 522                 if node_pubkey == pubkey {
 523                         return Ok(());
 524                 }
 525         }
 526         match lightning_net_tokio::connect_outbound(Arc::clone(&peer_manager), pubkey, peer_addr).await
 527         {
 528                 Some(connection_closed_future) => {
 529                         let mut connection_closed_future = Box::pin(connection_closed_future);
 530                         loop {
 531                                 match futures::poll!(&mut connection_closed_future) {
 532                                         std::task::Poll::Ready(_) => {
 533                                                 println!("ERROR: Peer disconnected before we finished the handshake");
 534                                                 return Err(());
 535                                         }
 536                                         std::task::Poll::Pending => {}
 537                                 }
 538                                 // Avoid blocking the tokio context by sleeping a bit
 539                                 match peer_manager.get_peer_node_ids().iter().find(|id| **id == pubkey) {
 540                                         Some(_) => break,
 541                                         None => tokio::time::sleep(Duration::from_millis(10)).await,
 542                                 }
 543                         }
 544                 }
 545                 None => {
 546                         println!("ERROR: failed to connect to peer");
 547                         return Err(());
 548                 }
 549         }
 550         Ok(())
 551 }
 552
 553 fn open_channel(
 554         peer_pubkey: PublicKey, channel_amt_sat: u64, announced_channel: bool,
 555         channel_manager: Arc<ChannelManager>,
 556 ) -> Result<(), ()> {
 557         let config = UserConfig {
 558                 peer_channel_config_limits: ChannelHandshakeLimits {
 559                         // lnd's max to_self_delay is 2016, so we want to be compatible.
 560                         their_to_self_delay: 2016,
 561                         ..Default::default()
 562                 },
 563                 channel_options: ChannelConfig { announced_channel, ..Default::default() },
 564                 ..Default::default()
 565         };
 566
 567         match channel_manager.create_channel(peer_pubkey, channel_amt_sat, 0, 0, Some(config)) {
 568                 Ok(_) => {
 569                         println!("EVENT: initiated channel with peer {}. ", peer_pubkey);
 570                         return Ok(());
 571                 }
 572                 Err(e) => {
 573                         println!("ERROR: failed to open channel: {:?}", e);
 574                         return Err(());
 575                 }
 576         }
 577 }
 578
 579 fn send_payment(
 580         payee: PublicKey, amt_msat: u64, final_cltv: u32, payment_hash: PaymentHash,
 581         payment_secret: Option<PaymentSecret>, payee_features: Option<InvoiceFeatures>,
 582         route_hints: Vec<&RouteHint>,
 583         router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access + Send + Sync>, Arc<FilesystemLogger>>>,
 584         channel_manager: Arc<ChannelManager>, payment_storage: PaymentInfoStorage,
 585         logger: Arc<FilesystemLogger>,
 586 ) {
 587         let network_graph = router.network_graph.read().unwrap();
 588         let first_hops = channel_manager.list_usable_channels();
 589         let payer_pubkey = channel_manager.get_our_node_id();
 590
 591         let route = router::get_route(
 592                 &payer_pubkey,
 593                 &network_graph,
 594                 &payee,
 595                 payee_features,
 596                 Some(&first_hops.iter().collect::<Vec<_>>()),
 597                 &route_hints,
 598                 amt_msat,
 599                 final_cltv,
 600                 logger,
 601         );
 602         if let Err(e) = route {
 603                 println!("ERROR: failed to find route: {}", e.err);
 604                 return;
 605         }
 606         let status = match channel_manager.send_payment(&route.unwrap(), payment_hash, &payment_secret)
 607         {
 608                 Ok(()) => {
 609                         println!("EVENT: initiated sending {} msats to {}", amt_msat, payee);
 610                         HTLCStatus::Pending
 611                 }
 612                 Err(e) => {
 613                         println!("ERROR: failed to send payment: {:?}", e);
 614                         HTLCStatus::Failed
 615                 }
 616         };
 617         let mut payments = payment_storage.lock().unwrap();
 618         payments.insert(
 619                 payment_hash,
 620                 PaymentInfo {
 621                         preimage: None,
 622                         secret: payment_secret,
 623                         status,
 624                         amt_msat: MillisatAmount(Some(amt_msat)),
 625                 },
 626         );
 627 }
 628
 629 fn keysend(
 630         payee: PublicKey, amt_msat: u64,
 631         router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access + Send + Sync>, Arc<FilesystemLogger>>>,
 632         channel_manager: Arc<ChannelManager>, payment_storage: PaymentInfoStorage,
 633         logger: Arc<FilesystemLogger>,
 634 ) {
 635         let network_graph = router.network_graph.read().unwrap();
 636         let first_hops = channel_manager.list_usable_channels();
 637         let payer_pubkey = channel_manager.get_our_node_id();
 638
 639         let route = match router::get_keysend_route(
 640                 &payer_pubkey,
 641                 &network_graph,
 642                 &payee,
 643                 Some(&first_hops.iter().collect::<Vec<_>>()),
 644                 &vec![],
 645                 amt_msat,
 646                 40,
 647                 logger,
 648         ) {
 649                 Ok(r) => r,
 650                 Err(e) => {
 651                         println!("ERROR: failed to find route: {}", e.err);
 652                         return;
 653                 }
 654         };
 655
 656         let mut payments = payment_storage.lock().unwrap();
 657         let payment_hash = channel_manager.send_spontaneous_payment(&route, None).unwrap();
 658         payments.insert(
 659                 payment_hash,
 660                 PaymentInfo {
 661                         preimage: None,
 662                         secret: None,
 663                         status: HTLCStatus::Pending,
 664                         amt_msat: MillisatAmount(Some(amt_msat)),
 665                 },
 666         );
 667 }
 668
 669 fn get_invoice(
 670         amt_msat: u64, payment_storage: PaymentInfoStorage, channel_manager: Arc<ChannelManager>,
 671         keys_manager: Arc<KeysManager>, network: Network,
 672 ) {
 673         let mut payments = payment_storage.lock().unwrap();
 674         let currency = match network {
 675                 Network::Bitcoin => Currency::Bitcoin,
 676                 Network::Testnet => Currency::BitcoinTestnet,
 677                 Network::Regtest => Currency::Regtest,
 678                 Network::Signet => panic!("Signet unsupported"),
 679         };
 680         let invoice = match utils::create_invoice_from_channelmanager(
 681                 &channel_manager,
 682                 keys_manager,
 683                 currency,
 684                 Some(amt_msat),
 685                 "ldk-tutorial-node".to_string(),
 686         ) {
 687                 Ok(inv) => {
 688                         println!("SUCCESS: generated invoice: {}", inv);
 689                         inv
 690                 }
 691                 Err(e) => {
 692                         println!("ERROR: failed to create invoice: {:?}", e);
 693                         return;
 694                 }
 695         };
 696
 697         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 698         payments.insert(
 699                 payment_hash,
 700                 PaymentInfo {
 701                         preimage: None,
 702                         secret: invoice.payment_secret().cloned(),
 703                         status: HTLCStatus::Pending,
 704                         amt_msat: MillisatAmount(Some(amt_msat)),
 705                 },
 706         );
 707 }
 708
 709 fn close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 710         match channel_manager.close_channel(&channel_id) {
 711                 Ok(()) => println!("EVENT: initiating channel close"),
 712                 Err(e) => println!("ERROR: failed to close channel: {:?}", e),
 713         }
 714 }
 715
 716 fn force_close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 717         match channel_manager.force_close_channel(&channel_id) {
 718                 Ok(()) => println!("EVENT: initiating channel force-close"),
 719                 Err(e) => println!("ERROR: failed to force-close channel: {:?}", e),
 720         }
 721 }
 722
 723 pub(crate) fn parse_peer_info(
 724         peer_pubkey_and_ip_addr: String,
 725 ) -> Result<(PublicKey, SocketAddr), std::io::Error> {
 726         let mut pubkey_and_addr = peer_pubkey_and_ip_addr.split("@");
 727         let pubkey = pubkey_and_addr.next();
 728         let peer_addr_str = pubkey_and_addr.next();
 729         if peer_addr_str.is_none() || peer_addr_str.is_none() {
 730                 return Err(std::io::Error::new(
 731                         std::io::ErrorKind::Other,
 732                         "ERROR: incorrectly formatted peer info. Should be formatted as: `pubkey@host:port`",
 733                 ));
 734         }
 735
 736         let peer_addr = peer_addr_str.unwrap().to_socket_addrs().map(|mut r| r.next());
 737         if peer_addr.is_err() || peer_addr.as_ref().unwrap().is_none() {
 738                 return Err(std::io::Error::new(
 739                         std::io::ErrorKind::Other,
 740                         "ERROR: couldn't parse pubkey@host:port into a socket address",
 741                 ));
 742         }
 743
 744         let pubkey = hex_utils::to_compressed_pubkey(pubkey.unwrap());
 745         if pubkey.is_none() {
 746                 return Err(std::io::Error::new(
 747                         std::io::ErrorKind::Other,
 748                         "ERROR: unable to parse given pubkey for node",
 749                 ));
 750         }
 751
 752         Ok((pubkey.unwrap(), peer_addr.unwrap().unwrap()))
 753 }