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