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

   1 use crate::disk;
   2 use crate::hex_utils;
   3 use crate::{
   4         ChannelManager, HTLCStatus, InvoicePayer, MillisatAmount, NetworkGraph, PaymentInfo,
   5         PaymentInfoStorage, PeerManager,
   6 };
   7 use bitcoin::hashes::sha256::Hash as Sha256;
   8 use bitcoin::hashes::Hash;
   9 use bitcoin::network::constants::Network;
  10 use bitcoin::secp256k1::PublicKey;
  11 use lightning::chain::keysinterface::{KeysInterface, KeysManager, Recipient};
  12 use lightning::ln::msgs::NetAddress;
  13 use lightning::ln::{PaymentHash, PaymentPreimage};
  14 use lightning::routing::gossip::NodeId;
  15 use lightning::util::config::{ChannelHandshakeConfig, ChannelHandshakeLimits, UserConfig};
  16 use lightning::util::events::EventHandler;
  17 use lightning_invoice::payment::PaymentError;
  18 use lightning_invoice::{utils, Currency, Invoice};
  19 use std::env;
  20 use std::io;
  21 use std::io::{BufRead, Write};
  22 use std::net::{IpAddr, SocketAddr, ToSocketAddrs};
  23 use std::ops::Deref;
  24 use std::path::Path;
  25 use std::str::FromStr;
  26 use std::sync::Arc;
  27 use std::time::Duration;
  28
  29 pub(crate) struct LdkUserInfo {
  30         pub(crate) bitcoind_rpc_username: String,
  31         pub(crate) bitcoind_rpc_password: String,
  32         pub(crate) bitcoind_rpc_port: u16,
  33         pub(crate) bitcoind_rpc_host: String,
  34         pub(crate) ldk_storage_dir_path: String,
  35         pub(crate) ldk_peer_listening_port: u16,
  36         pub(crate) ldk_announced_listen_addr: Vec<NetAddress>,
  37         pub(crate) ldk_announced_node_name: [u8; 32],
  38         pub(crate) network: Network,
  39 }
  40
  41 pub(crate) fn parse_startup_args() -> Result<LdkUserInfo, ()> {
  42         if env::args().len() < 3 {
  43                 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*]`");
  44                 return Err(());
  45         }
  46         let bitcoind_rpc_info = env::args().skip(1).next().unwrap();
  47         let bitcoind_rpc_info_parts: Vec<&str> = bitcoind_rpc_info.rsplitn(2, "@").collect();
  48         if bitcoind_rpc_info_parts.len() != 2 {
  49                 println!("ERROR: bad bitcoind RPC URL provided");
  50                 return Err(());
  51         }
  52         let rpc_user_and_password: Vec<&str> = bitcoind_rpc_info_parts[1].split(":").collect();
  53         if rpc_user_and_password.len() != 2 {
  54                 println!("ERROR: bad bitcoind RPC username/password combo provided");
  55                 return Err(());
  56         }
  57         let bitcoind_rpc_username = rpc_user_and_password[0].to_string();
  58         let bitcoind_rpc_password = rpc_user_and_password[1].to_string();
  59         let bitcoind_rpc_path: Vec<&str> = bitcoind_rpc_info_parts[0].split(":").collect();
  60         if bitcoind_rpc_path.len() != 2 {
  61                 println!("ERROR: bad bitcoind RPC path provided");
  62                 return Err(());
  63         }
  64         let bitcoind_rpc_host = bitcoind_rpc_path[0].to_string();
  65         let bitcoind_rpc_port = bitcoind_rpc_path[1].parse::<u16>().unwrap();
  66
  67         let ldk_storage_dir_path = env::args().skip(2).next().unwrap();
  68
  69         let mut ldk_peer_port_set = true;
  70         let ldk_peer_listening_port: u16 = match env::args().skip(3).next().map(|p| p.parse()) {
  71                 Some(Ok(p)) => p,
  72                 Some(Err(_)) => {
  73                         ldk_peer_port_set = false;
  74                         9735
  75                 }
  76                 None => {
  77                         ldk_peer_port_set = false;
  78                         9735
  79                 }
  80         };
  81
  82         let mut arg_idx = match ldk_peer_port_set {
  83                 true => 4,
  84                 false => 3,
  85         };
  86         let network: Network = match env::args().skip(arg_idx).next().as_ref().map(String::as_str) {
  87                 Some("testnet") => Network::Testnet,
  88                 Some("regtest") => Network::Regtest,
  89                 Some("signet") => Network::Signet,
  90                 Some(net) => {
  91                         panic!("Unsupported network provided. Options are: `regtest`, `testnet`, and `signet`. 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<E: EventHandler>(
 143         invoice_payer: Arc<InvoicePayer<E>>, peer_manager: Arc<PeerManager>,
 144         channel_manager: Arc<ChannelManager>, keys_manager: Arc<KeysManager>,
 145         network_graph: Arc<NetworkGraph>, inbound_payments: PaymentInfoStorage,
 146         outbound_payments: PaymentInfoStorage, ldk_data_dir: String, network: Network,
 147 ) {
 148         println!("LDK startup successful. To view available commands: \"help\".");
 149         println!("LDK logs are available at <your-supplied-ldk-data-dir-path>/.ldk/logs");
 150         println!("Local Node ID is {}.", channel_manager.get_our_node_id());
 151         let stdin = io::stdin();
 152         let mut line_reader = stdin.lock().lines();
 153         loop {
 154                 print!("> ");
 155                 io::stdout().flush().unwrap(); // Without flushing, the `>` doesn't print
 156                 let line = match line_reader.next() {
 157                         Some(l) => l.unwrap(),
 158                         None => break,
 159                 };
 160                 let mut words = line.split_whitespace();
 161                 if let Some(word) = words.next() {
 162                         match word {
 163                                 "help" => help(),
 164                                 "openchannel" => {
 165                                         let peer_pubkey_and_ip_addr = words.next();
 166                                         let channel_value_sat = words.next();
 167                                         if peer_pubkey_and_ip_addr.is_none() || channel_value_sat.is_none() {
 168                                                 println!("ERROR: openchannel has 2 required arguments: `openchannel pubkey@host:port channel_amt_satoshis` [--public]");
 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                                                                 continue;
 178                                                         }
 179                                                 };
 180
 181                                         let chan_amt_sat: Result<u64, _> = channel_value_sat.unwrap().parse();
 182                                         if chan_amt_sat.is_err() {
 183                                                 println!("ERROR: channel amount must be a number");
 184                                                 continue;
 185                                         }
 186
 187                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 188                                                 .await
 189                                                 .is_err()
 190                                         {
 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                                                         continue;
 200                                                 }
 201                                                 None => false,
 202                                         };
 203
 204                                         if open_channel(
 205                                                 pubkey,
 206                                                 chan_amt_sat.unwrap(),
 207                                                 announce_channel,
 208                                                 channel_manager.clone(),
 209                                         )
 210                                         .is_ok()
 211                                         {
 212                                                 let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
 213                                                 let _ = disk::persist_channel_peer(
 214                                                         Path::new(&peer_data_path),
 215                                                         peer_pubkey_and_ip_addr,
 216                                                 );
 217                                         }
 218                                 }
 219                                 "sendpayment" => {
 220                                         let invoice_str = words.next();
 221                                         if invoice_str.is_none() {
 222                                                 println!("ERROR: sendpayment requires an invoice: `sendpayment <invoice>`");
 223                                                 continue;
 224                                         }
 225
 226                                         let invoice = match Invoice::from_str(invoice_str.unwrap()) {
 227                                                 Ok(inv) => inv,
 228                                                 Err(e) => {
 229                                                         println!("ERROR: invalid invoice: {:?}", e);
 230                                                         continue;
 231                                                 }
 232                                         };
 233
 234                                         send_payment(&*invoice_payer, &invoice, outbound_payments.clone());
 235                                 }
 236                                 "keysend" => {
 237                                         let dest_pubkey = match words.next() {
 238                                                 Some(dest) => match hex_utils::to_compressed_pubkey(dest) {
 239                                                         Some(pk) => pk,
 240                                                         None => {
 241                                                                 println!("ERROR: couldn't parse destination pubkey");
 242                                                                 continue;
 243                                                         }
 244                                                 },
 245                                                 None => {
 246                                                         println!("ERROR: keysend requires a destination pubkey: `keysend <dest_pubkey> <amt_msat>`");
 247                                                         continue;
 248                                                 }
 249                                         };
 250                                         let amt_msat_str = match words.next() {
 251                                                 Some(amt) => amt,
 252                                                 None => {
 253                                                         println!("ERROR: keysend requires an amount in millisatoshis: `keysend <dest_pubkey> <amt_msat>`");
 254                                                         continue;
 255                                                 }
 256                                         };
 257                                         let amt_msat: u64 = match amt_msat_str.parse() {
 258                                                 Ok(amt) => amt,
 259                                                 Err(e) => {
 260                                                         println!("ERROR: couldn't parse amount_msat: {}", e);
 261                                                         continue;
 262                                                 }
 263                                         };
 264                                         keysend(
 265                                                 &*invoice_payer,
 266                                                 dest_pubkey,
 267                                                 amt_msat,
 268                                                 &*keys_manager,
 269                                                 outbound_payments.clone(),
 270                                         );
 271                                 }
 272                                 "getinvoice" => {
 273                                         let amt_str = words.next();
 274                                         if amt_str.is_none() {
 275                                                 println!("ERROR: getinvoice requires an amount in millisatoshis");
 276                                                 continue;
 277                                         }
 278
 279                                         let amt_msat: Result<u64, _> = amt_str.unwrap().parse();
 280                                         if amt_msat.is_err() {
 281                                                 println!("ERROR: getinvoice provided payment amount was not a number");
 282                                                 continue;
 283                                         }
 284
 285                                         let expiry_secs_str = words.next();
 286                                         if expiry_secs_str.is_none() {
 287                                                 println!("ERROR: getinvoice requires an expiry in seconds");
 288                                                 continue;
 289                                         }
 290
 291                                         let expiry_secs: Result<u32, _> = expiry_secs_str.unwrap().parse();
 292                                         if expiry_secs.is_err() {
 293                                                 println!("ERROR: getinvoice provided expiry was not a number");
 294                                                 continue;
 295                                         }
 296
 297                                         get_invoice(
 298                                                 amt_msat.unwrap(),
 299                                                 inbound_payments.clone(),
 300                                                 channel_manager.clone(),
 301                                                 keys_manager.clone(),
 302                                                 network,
 303                                                 expiry_secs.unwrap(),
 304                                         );
 305                                 }
 306                                 "connectpeer" => {
 307                                         let peer_pubkey_and_ip_addr = words.next();
 308                                         if peer_pubkey_and_ip_addr.is_none() {
 309                                                 println!("ERROR: connectpeer requires peer connection info: `connectpeer pubkey@host:port`");
 310                                                 continue;
 311                                         }
 312                                         let (pubkey, peer_addr) =
 313                                                 match parse_peer_info(peer_pubkey_and_ip_addr.unwrap().to_string()) {
 314                                                         Ok(info) => info,
 315                                                         Err(e) => {
 316                                                                 println!("{:?}", e.into_inner().unwrap());
 317                                                                 continue;
 318                                                         }
 319                                                 };
 320                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 321                                                 .await
 322                                                 .is_ok()
 323                                         {
 324                                                 println!("SUCCESS: connected to peer {}", pubkey);
 325                                         }
 326                                 }
 327                                 "listchannels" => list_channels(&channel_manager, &network_graph),
 328                                 "listpayments" => {
 329                                         list_payments(inbound_payments.clone(), outbound_payments.clone())
 330                                 }
 331                                 "closechannel" => {
 332                                         let channel_id_str = words.next();
 333                                         if channel_id_str.is_none() {
 334                                                 println!("ERROR: closechannel requires a channel ID: `closechannel <channel_id> <peer_pubkey>`");
 335                                                 continue;
 336                                         }
 337                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 338                                         if channel_id_vec.is_none() || channel_id_vec.as_ref().unwrap().len() != 32 {
 339                                                 println!("ERROR: couldn't parse channel_id");
 340                                                 continue;
 341                                         }
 342                                         let mut channel_id = [0; 32];
 343                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 344
 345                                         let peer_pubkey_str = words.next();
 346                                         if peer_pubkey_str.is_none() {
 347                                                 println!("ERROR: closechannel requires a peer pubkey: `closechannel <channel_id> <peer_pubkey>`");
 348                                                 continue;
 349                                         }
 350                                         let peer_pubkey_vec = match hex_utils::to_vec(peer_pubkey_str.unwrap()) {
 351                                                 Some(peer_pubkey_vec) => peer_pubkey_vec,
 352                                                 None => {
 353                                                         println!("ERROR: couldn't parse peer_pubkey");
 354                                                         continue;
 355                                                 }
 356                                         };
 357                                         let peer_pubkey = match PublicKey::from_slice(&peer_pubkey_vec) {
 358                                                 Ok(peer_pubkey) => peer_pubkey,
 359                                                 Err(_) => {
 360                                                         println!("ERROR: couldn't parse peer_pubkey");
 361                                                         continue;
 362                                                 }
 363                                         };
 364
 365                                         close_channel(channel_id, peer_pubkey, channel_manager.clone());
 366                                 }
 367                                 "forceclosechannel" => {
 368                                         let channel_id_str = words.next();
 369                                         if channel_id_str.is_none() {
 370                                                 println!("ERROR: forceclosechannel requires a channel ID: `forceclosechannel <channel_id> <peer_pubkey>`");
 371                                                 continue;
 372                                         }
 373                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 374                                         if channel_id_vec.is_none() || channel_id_vec.as_ref().unwrap().len() != 32 {
 375                                                 println!("ERROR: couldn't parse channel_id");
 376                                                 continue;
 377                                         }
 378                                         let mut channel_id = [0; 32];
 379                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 380
 381                                         let peer_pubkey_str = words.next();
 382                                         if peer_pubkey_str.is_none() {
 383                                                 println!("ERROR: forceclosechannel requires a peer pubkey: `forceclosechannel <channel_id> <peer_pubkey>`");
 384                                                 continue;
 385                                         }
 386                                         let peer_pubkey_vec = match hex_utils::to_vec(peer_pubkey_str.unwrap()) {
 387                                                 Some(peer_pubkey_vec) => peer_pubkey_vec,
 388                                                 None => {
 389                                                         println!("ERROR: couldn't parse peer_pubkey");
 390                                                         continue;
 391                                                 }
 392                                         };
 393                                         let peer_pubkey = match PublicKey::from_slice(&peer_pubkey_vec) {
 394                                                 Ok(peer_pubkey) => peer_pubkey,
 395                                                 Err(_) => {
 396                                                         println!("ERROR: couldn't parse peer_pubkey");
 397                                                         continue;
 398                                                 }
 399                                         };
 400
 401                                         force_close_channel(channel_id, peer_pubkey, channel_manager.clone());
 402                                 }
 403                                 "nodeinfo" => node_info(&channel_manager, &peer_manager),
 404                                 "listpeers" => list_peers(peer_manager.clone()),
 405                                 "signmessage" => {
 406                                         const MSG_STARTPOS: usize = "signmessage".len() + 1;
 407                                         if line.as_bytes().len() <= MSG_STARTPOS {
 408                                                 println!("ERROR: signmsg requires a message");
 409                                                 continue;
 410                                         }
 411                                         println!(
 412                                                 "{:?}",
 413                                                 lightning::util::message_signing::sign(
 414                                                         &line.as_bytes()[MSG_STARTPOS..],
 415                                                         &keys_manager.get_node_secret(Recipient::Node).unwrap()
 416                                                 )
 417                                         );
 418                                 }
 419                                 _ => println!("Unknown command. See `\"help\" for available commands."),
 420                         }
 421                 }
 422         }
 423 }
 424
 425 fn help() {
 426         println!("openchannel pubkey@host:port <amt_satoshis>");
 427         println!("sendpayment <invoice>");
 428         println!("keysend <dest_pubkey> <amt_msats>");
 429         println!("getinvoice <amt_msats> <expiry_secs>");
 430         println!("connectpeer pubkey@host:port");
 431         println!("listchannels");
 432         println!("listpayments");
 433         println!("closechannel <channel_id> <peer_pubkey>");
 434         println!("forceclosechannel <channel_id> <peer_pubkey>");
 435         println!("nodeinfo");
 436         println!("listpeers");
 437         println!("signmessage <message>");
 438 }
 439
 440 fn node_info(channel_manager: &Arc<ChannelManager>, peer_manager: &Arc<PeerManager>) {
 441         println!("\t{{");
 442         println!("\t\t node_pubkey: {}", channel_manager.get_our_node_id());
 443         let chans = channel_manager.list_channels();
 444         println!("\t\t num_channels: {}", chans.len());
 445         println!("\t\t num_usable_channels: {}", chans.iter().filter(|c| c.is_usable).count());
 446         let local_balance_msat = chans.iter().map(|c| c.balance_msat).sum::<u64>();
 447         println!("\t\t local_balance_msat: {}", local_balance_msat);
 448         println!("\t\t num_peers: {}", peer_manager.get_peer_node_ids().len());
 449         println!("\t}},");
 450 }
 451
 452 fn list_peers(peer_manager: Arc<PeerManager>) {
 453         println!("\t{{");
 454         for pubkey in peer_manager.get_peer_node_ids() {
 455                 println!("\t\t pubkey: {}", pubkey);
 456         }
 457         println!("\t}},");
 458 }
 459
 460 fn list_channels(channel_manager: &Arc<ChannelManager>, network_graph: &Arc<NetworkGraph>) {
 461         print!("[");
 462         for chan_info in channel_manager.list_channels() {
 463                 println!("");
 464                 println!("\t{{");
 465                 println!("\t\tchannel_id: {},", hex_utils::hex_str(&chan_info.channel_id[..]));
 466                 if let Some(funding_txo) = chan_info.funding_txo {
 467                         println!("\t\tfunding_txid: {},", funding_txo.txid);
 468                 }
 469
 470                 println!(
 471                         "\t\tpeer_pubkey: {},",
 472                         hex_utils::hex_str(&chan_info.counterparty.node_id.serialize())
 473                 );
 474                 if let Some(node_info) = network_graph
 475                         .read_only()
 476                         .nodes()
 477                         .get(&NodeId::from_pubkey(&chan_info.counterparty.node_id))
 478                 {
 479                         if let Some(announcement) = &node_info.announcement_info {
 480                                 println!("\t\tpeer_alias: {}", announcement.alias);
 481                         }
 482                 }
 483
 484                 if let Some(id) = chan_info.short_channel_id {
 485                         println!("\t\tshort_channel_id: {},", id);
 486                 }
 487                 println!("\t\tis_channel_ready: {},", chan_info.is_channel_ready);
 488                 println!("\t\tchannel_value_satoshis: {},", chan_info.channel_value_satoshis);
 489                 println!("\t\tlocal_balance_msat: {},", chan_info.balance_msat);
 490                 if chan_info.is_usable {
 491                         println!("\t\tavailable_balance_for_send_msat: {},", chan_info.outbound_capacity_msat);
 492                         println!("\t\tavailable_balance_for_recv_msat: {},", chan_info.inbound_capacity_msat);
 493                 }
 494                 println!("\t\tchannel_can_send_payments: {},", chan_info.is_usable);
 495                 println!("\t\tpublic: {},", chan_info.is_public);
 496                 println!("\t}},");
 497         }
 498         println!("]");
 499 }
 500
 501 fn list_payments(inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage) {
 502         let inbound = inbound_payments.lock().unwrap();
 503         let outbound = outbound_payments.lock().unwrap();
 504         print!("[");
 505         for (payment_hash, payment_info) in inbound.deref() {
 506                 println!("");
 507                 println!("\t{{");
 508                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 509                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 510                 println!("\t\thtlc_direction: inbound,");
 511                 println!(
 512                         "\t\thtlc_status: {},",
 513                         match payment_info.status {
 514                                 HTLCStatus::Pending => "pending",
 515                                 HTLCStatus::Succeeded => "succeeded",
 516                                 HTLCStatus::Failed => "failed",
 517                         }
 518                 );
 519
 520                 println!("\t}},");
 521         }
 522
 523         for (payment_hash, payment_info) in outbound.deref() {
 524                 println!("");
 525                 println!("\t{{");
 526                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 527                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 528                 println!("\t\thtlc_direction: outbound,");
 529                 println!(
 530                         "\t\thtlc_status: {},",
 531                         match payment_info.status {
 532                                 HTLCStatus::Pending => "pending",
 533                                 HTLCStatus::Succeeded => "succeeded",
 534                                 HTLCStatus::Failed => "failed",
 535                         }
 536                 );
 537
 538                 println!("\t}},");
 539         }
 540         println!("]");
 541 }
 542
 543 pub(crate) async fn connect_peer_if_necessary(
 544         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 545 ) -> Result<(), ()> {
 546         for node_pubkey in peer_manager.get_peer_node_ids() {
 547                 if node_pubkey == pubkey {
 548                         return Ok(());
 549                 }
 550         }
 551         let res = do_connect_peer(pubkey, peer_addr, peer_manager).await;
 552         if res.is_err() {
 553                 println!("ERROR: failed to connect to peer");
 554         }
 555         res
 556 }
 557
 558 pub(crate) async fn do_connect_peer(
 559         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 560 ) -> Result<(), ()> {
 561         match lightning_net_tokio::connect_outbound(Arc::clone(&peer_manager), pubkey, peer_addr).await
 562         {
 563                 Some(connection_closed_future) => {
 564                         let mut connection_closed_future = Box::pin(connection_closed_future);
 565                         loop {
 566                                 match futures::poll!(&mut connection_closed_future) {
 567                                         std::task::Poll::Ready(_) => {
 568                                                 return Err(());
 569                                         }
 570                                         std::task::Poll::Pending => {}
 571                                 }
 572                                 // Avoid blocking the tokio context by sleeping a bit
 573                                 match peer_manager.get_peer_node_ids().iter().find(|id| **id == pubkey) {
 574                                         Some(_) => return Ok(()),
 575                                         None => tokio::time::sleep(Duration::from_millis(10)).await,
 576                                 }
 577                         }
 578                 }
 579                 None => Err(()),
 580         }
 581 }
 582
 583 fn open_channel(
 584         peer_pubkey: PublicKey, channel_amt_sat: u64, announced_channel: bool,
 585         channel_manager: Arc<ChannelManager>,
 586 ) -> Result<(), ()> {
 587         let config = UserConfig {
 588                 channel_handshake_limits: ChannelHandshakeLimits {
 589                         // lnd's max to_self_delay is 2016, so we want to be compatible.
 590                         their_to_self_delay: 2016,
 591                         ..Default::default()
 592                 },
 593                 channel_handshake_config: ChannelHandshakeConfig {
 594                         announced_channel,
 595                         ..Default::default()
 596                 },
 597                 ..Default::default()
 598         };
 599
 600         match channel_manager.create_channel(peer_pubkey, channel_amt_sat, 0, 0, Some(config)) {
 601                 Ok(_) => {
 602                         println!("EVENT: initiated channel with peer {}. ", peer_pubkey);
 603                         return Ok(());
 604                 }
 605                 Err(e) => {
 606                         println!("ERROR: failed to open channel: {:?}", e);
 607                         return Err(());
 608                 }
 609         }
 610 }
 611
 612 fn send_payment<E: EventHandler>(
 613         invoice_payer: &InvoicePayer<E>, invoice: &Invoice, payment_storage: PaymentInfoStorage,
 614 ) {
 615         let status = match invoice_payer.pay_invoice(invoice) {
 616                 Ok(_payment_id) => {
 617                         let payee_pubkey = invoice.recover_payee_pub_key();
 618                         let amt_msat = invoice.amount_milli_satoshis().unwrap();
 619                         println!("EVENT: initiated sending {} msats to {}", amt_msat, payee_pubkey);
 620                         print!("> ");
 621                         HTLCStatus::Pending
 622                 }
 623                 Err(PaymentError::Invoice(e)) => {
 624                         println!("ERROR: invalid invoice: {}", e);
 625                         print!("> ");
 626                         return;
 627                 }
 628                 Err(PaymentError::Routing(e)) => {
 629                         println!("ERROR: failed to find route: {}", e.err);
 630                         print!("> ");
 631                         return;
 632                 }
 633                 Err(PaymentError::Sending(e)) => {
 634                         println!("ERROR: failed to send payment: {:?}", e);
 635                         print!("> ");
 636                         HTLCStatus::Failed
 637                 }
 638         };
 639         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 640         let payment_secret = Some(invoice.payment_secret().clone());
 641
 642         let mut payments = payment_storage.lock().unwrap();
 643         payments.insert(
 644                 payment_hash,
 645                 PaymentInfo {
 646                         preimage: None,
 647                         secret: payment_secret,
 648                         status,
 649                         amt_msat: MillisatAmount(invoice.amount_milli_satoshis()),
 650                 },
 651         );
 652 }
 653
 654 fn keysend<E: EventHandler, K: KeysInterface>(
 655         invoice_payer: &InvoicePayer<E>, payee_pubkey: PublicKey, amt_msat: u64, keys: &K,
 656         payment_storage: PaymentInfoStorage,
 657 ) {
 658         let payment_preimage = keys.get_secure_random_bytes();
 659
 660         let status = match invoice_payer.pay_pubkey(
 661                 payee_pubkey,
 662                 PaymentPreimage(payment_preimage),
 663                 amt_msat,
 664                 40,
 665         ) {
 666                 Ok(_payment_id) => {
 667                         println!("EVENT: initiated sending {} msats to {}", amt_msat, payee_pubkey);
 668                         print!("> ");
 669                         HTLCStatus::Pending
 670                 }
 671                 Err(PaymentError::Invoice(e)) => {
 672                         println!("ERROR: invalid payee: {}", e);
 673                         print!("> ");
 674                         return;
 675                 }
 676                 Err(PaymentError::Routing(e)) => {
 677                         println!("ERROR: failed to find route: {}", e.err);
 678                         print!("> ");
 679                         return;
 680                 }
 681                 Err(PaymentError::Sending(e)) => {
 682                         println!("ERROR: failed to send payment: {:?}", e);
 683                         print!("> ");
 684                         HTLCStatus::Failed
 685                 }
 686         };
 687
 688         let mut payments = payment_storage.lock().unwrap();
 689         payments.insert(
 690                 PaymentHash(Sha256::hash(&payment_preimage).into_inner()),
 691                 PaymentInfo {
 692                         preimage: None,
 693                         secret: None,
 694                         status,
 695                         amt_msat: MillisatAmount(Some(amt_msat)),
 696                 },
 697         );
 698 }
 699
 700 fn get_invoice(
 701         amt_msat: u64, payment_storage: PaymentInfoStorage, channel_manager: Arc<ChannelManager>,
 702         keys_manager: Arc<KeysManager>, network: Network, expiry_secs: u32,
 703 ) {
 704         let mut payments = payment_storage.lock().unwrap();
 705         let currency = match network {
 706                 Network::Bitcoin => Currency::Bitcoin,
 707                 Network::Testnet => Currency::BitcoinTestnet,
 708                 Network::Regtest => Currency::Regtest,
 709                 Network::Signet => Currency::Signet,
 710         };
 711         let invoice = match utils::create_invoice_from_channelmanager(
 712                 &channel_manager,
 713                 keys_manager,
 714                 currency,
 715                 Some(amt_msat),
 716                 "ldk-tutorial-node".to_string(),
 717                 expiry_secs,
 718         ) {
 719                 Ok(inv) => {
 720                         println!("SUCCESS: generated invoice: {}", inv);
 721                         inv
 722                 }
 723                 Err(e) => {
 724                         println!("ERROR: failed to create invoice: {:?}", e);
 725                         return;
 726                 }
 727         };
 728
 729         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 730         payments.insert(
 731                 payment_hash,
 732                 PaymentInfo {
 733                         preimage: None,
 734                         secret: Some(invoice.payment_secret().clone()),
 735                         status: HTLCStatus::Pending,
 736                         amt_msat: MillisatAmount(Some(amt_msat)),
 737                 },
 738         );
 739 }
 740
 741 fn close_channel(
 742         channel_id: [u8; 32], counterparty_node_id: PublicKey, channel_manager: Arc<ChannelManager>,
 743 ) {
 744         match channel_manager.close_channel(&channel_id, &counterparty_node_id) {
 745                 Ok(()) => println!("EVENT: initiating channel close"),
 746                 Err(e) => println!("ERROR: failed to close channel: {:?}", e),
 747         }
 748 }
 749
 750 fn force_close_channel(
 751         channel_id: [u8; 32], counterparty_node_id: PublicKey, channel_manager: Arc<ChannelManager>,
 752 ) {
 753         match channel_manager.force_close_broadcasting_latest_txn(&channel_id, &counterparty_node_id) {
 754                 Ok(()) => println!("EVENT: initiating channel force-close"),
 755                 Err(e) => println!("ERROR: failed to force-close channel: {:?}", e),
 756         }
 757 }
 758
 759 pub(crate) fn parse_peer_info(
 760         peer_pubkey_and_ip_addr: String,
 761 ) -> Result<(PublicKey, SocketAddr), std::io::Error> {
 762         let mut pubkey_and_addr = peer_pubkey_and_ip_addr.split("@");
 763         let pubkey = pubkey_and_addr.next();
 764         let peer_addr_str = pubkey_and_addr.next();
 765         if peer_addr_str.is_none() || peer_addr_str.is_none() {
 766                 return Err(std::io::Error::new(
 767                         std::io::ErrorKind::Other,
 768                         "ERROR: incorrectly formatted peer info. Should be formatted as: `pubkey@host:port`",
 769                 ));
 770         }
 771
 772         let peer_addr = peer_addr_str.unwrap().to_socket_addrs().map(|mut r| r.next());
 773         if peer_addr.is_err() || peer_addr.as_ref().unwrap().is_none() {
 774                 return Err(std::io::Error::new(
 775                         std::io::ErrorKind::Other,
 776                         "ERROR: couldn't parse pubkey@host:port into a socket address",
 777                 ));
 778         }
 779
 780         let pubkey = hex_utils::to_compressed_pubkey(pubkey.unwrap());
 781         if pubkey.is_none() {
 782                 return Err(std::io::Error::new(
 783                         std::io::ErrorKind::Other,
 784                         "ERROR: unable to parse given pubkey for node",
 785                 ));
 786         }
 787
 788         Ok((pubkey.unwrap(), peer_addr.unwrap().unwrap()))
 789 }