_ 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, OnionMessenger,
   5         PaymentInfo, 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::{DecodeError, NetAddress};
  13 use lightning::ln::{PaymentHash, PaymentPreimage};
  14 use lightning::onion_message::{CustomOnionMessageContents, Destination, OnionMessageContents};
  15 use lightning::routing::gossip::NodeId;
  16 use lightning::util::config::{ChannelHandshakeConfig, ChannelHandshakeLimits, UserConfig};
  17 use lightning::util::events::EventHandler;
  18 use lightning::util::ser::{MaybeReadableArgs, Writeable, Writer};
  19 use lightning_invoice::payment::PaymentError;
  20 use lightning_invoice::{utils, Currency, Invoice};
  21 use std::env;
  22 use std::io;
  23 use std::io::Write;
  24 use std::net::{SocketAddr, ToSocketAddrs};
  25 use std::ops::Deref;
  26 use std::path::Path;
  27 use std::str::FromStr;
  28 use std::sync::Arc;
  29 use std::time::Duration;
  30
  31 pub(crate) struct LdkUserInfo {
  32         pub(crate) bitcoind_rpc_username: String,
  33         pub(crate) bitcoind_rpc_password: String,
  34         pub(crate) bitcoind_rpc_port: u16,
  35         pub(crate) bitcoind_rpc_host: String,
  36         pub(crate) ldk_storage_dir_path: String,
  37         pub(crate) ldk_peer_listening_port: u16,
  38         pub(crate) ldk_announced_listen_addr: Vec<NetAddress>,
  39         pub(crate) ldk_announced_node_name: [u8; 32],
  40         pub(crate) network: Network,
  41 }
  42
  43 struct UserOnionMessageContents {
  44         tlv_type: u64,
  45         data: Vec<u8>,
  46 }
  47
  48 impl CustomOnionMessageContents for UserOnionMessageContents {
  49         fn tlv_type(&self) -> u64 {
  50                 self.tlv_type
  51         }
  52 }
  53 impl MaybeReadableArgs<u64> for UserOnionMessageContents {
  54         fn read<R: std::io::Read>(_r: &mut R, _args: u64) -> Result<Option<Self>, DecodeError> {
  55                 // UserOnionMessageContents is only ever passed to `send_onion_message`, never to an
  56                 // `OnionMessageHandler`, thus it does not need to implement the read side here.
  57                 unreachable!();
  58         }
  59 }
  60 impl Writeable for UserOnionMessageContents {
  61         fn write<W: Writer>(&self, w: &mut W) -> Result<(), std::io::Error> {
  62                 w.write_all(&self.data)
  63         }
  64 }
  65
  66 pub(crate) async fn poll_for_user_input<E: EventHandler>(
  67         invoice_payer: Arc<InvoicePayer<E>>, peer_manager: Arc<PeerManager>,
  68         channel_manager: Arc<ChannelManager>, keys_manager: Arc<KeysManager>,
  69         network_graph: Arc<NetworkGraph>, onion_messenger: Arc<OnionMessenger>,
  70         inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage,
  71         ldk_data_dir: String, network: Network, logger: Arc<disk::FilesystemLogger>,
  72 ) {
  73         println!(
  74                 "LDK startup successful. Enter \"help\" to view available commands. Press Ctrl-D to quit."
  75         );
  76         println!("LDK logs are available at <your-supplied-ldk-data-dir-path>/.ldk/logs");
  77         println!("Local Node ID is {}.", channel_manager.get_our_node_id());
  78         loop {
  79                 print!("> ");
  80                 io::stdout().flush().unwrap(); // Without flushing, the `>` doesn't print
  81                 let mut line = String::new();
  82                 if let Err(e) = io::stdin().read_line(&mut line) {
  83                         break println!("ERROR: {}", e);
  84                 }
  85
  86                 if line.len() == 0 {
  87                         // We hit EOF / Ctrl-D
  88                         break;
  89                 }
  90
  91                 let mut words = line.split_whitespace();
  92                 if let Some(word) = words.next() {
  93                         match word {
  94                                 "help" => help(),
  95                                 "openchannel" => {
  96                                         let peer_pubkey_and_ip_addr = words.next();
  97                                         let channel_value_sat = words.next();
  98                                         if peer_pubkey_and_ip_addr.is_none() || channel_value_sat.is_none() {
  99                                                 println!("ERROR: openchannel has 2 required arguments: `openchannel pubkey@host:port channel_amt_satoshis` [--public]");
 100                                                 continue;
 101                                         }
 102                                         let peer_pubkey_and_ip_addr = peer_pubkey_and_ip_addr.unwrap();
 103                                         let (pubkey, peer_addr) =
 104                                                 match parse_peer_info(peer_pubkey_and_ip_addr.to_string()) {
 105                                                         Ok(info) => info,
 106                                                         Err(e) => {
 107                                                                 println!("{:?}", e.into_inner().unwrap());
 108                                                                 continue;
 109                                                         }
 110                                                 };
 111
 112                                         let chan_amt_sat: Result<u64, _> = channel_value_sat.unwrap().parse();
 113                                         if chan_amt_sat.is_err() {
 114                                                 println!("ERROR: channel amount must be a number");
 115                                                 continue;
 116                                         }
 117
 118                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 119                                                 .await
 120                                                 .is_err()
 121                                         {
 122                                                 continue;
 123                                         };
 124
 125                                         let announce_channel = match words.next() {
 126                                                 Some("--public") | Some("--public=true") => true,
 127                                                 Some("--public=false") => false,
 128                                                 Some(_) => {
 129                                                         println!("ERROR: invalid `--public` command format. Valid formats: `--public`, `--public=true` `--public=false`");
 130                                                         continue;
 131                                                 }
 132                                                 None => false,
 133                                         };
 134
 135                                         if open_channel(
 136                                                 pubkey,
 137                                                 chan_amt_sat.unwrap(),
 138                                                 announce_channel,
 139                                                 channel_manager.clone(),
 140                                         )
 141                                         .is_ok()
 142                                         {
 143                                                 let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
 144                                                 let _ = disk::persist_channel_peer(
 145                                                         Path::new(&peer_data_path),
 146                                                         peer_pubkey_and_ip_addr,
 147                                                 );
 148                                         }
 149                                 }
 150                                 "sendpayment" => {
 151                                         let invoice_str = words.next();
 152                                         if invoice_str.is_none() {
 153                                                 println!("ERROR: sendpayment requires an invoice: `sendpayment <invoice>`");
 154                                                 continue;
 155                                         }
 156
 157                                         let invoice = match Invoice::from_str(invoice_str.unwrap()) {
 158                                                 Ok(inv) => inv,
 159                                                 Err(e) => {
 160                                                         println!("ERROR: invalid invoice: {:?}", e);
 161                                                         continue;
 162                                                 }
 163                                         };
 164
 165                                         send_payment(&*invoice_payer, &invoice, outbound_payments.clone());
 166                                 }
 167                                 "keysend" => {
 168                                         let dest_pubkey = match words.next() {
 169                                                 Some(dest) => match hex_utils::to_compressed_pubkey(dest) {
 170                                                         Some(pk) => pk,
 171                                                         None => {
 172                                                                 println!("ERROR: couldn't parse destination pubkey");
 173                                                                 continue;
 174                                                         }
 175                                                 },
 176                                                 None => {
 177                                                         println!("ERROR: keysend requires a destination pubkey: `keysend <dest_pubkey> <amt_msat>`");
 178                                                         continue;
 179                                                 }
 180                                         };
 181                                         let amt_msat_str = match words.next() {
 182                                                 Some(amt) => amt,
 183                                                 None => {
 184                                                         println!("ERROR: keysend requires an amount in millisatoshis: `keysend <dest_pubkey> <amt_msat>`");
 185                                                         continue;
 186                                                 }
 187                                         };
 188                                         let amt_msat: u64 = match amt_msat_str.parse() {
 189                                                 Ok(amt) => amt,
 190                                                 Err(e) => {
 191                                                         println!("ERROR: couldn't parse amount_msat: {}", e);
 192                                                         continue;
 193                                                 }
 194                                         };
 195                                         keysend(
 196                                                 &*invoice_payer,
 197                                                 dest_pubkey,
 198                                                 amt_msat,
 199                                                 &*keys_manager,
 200                                                 outbound_payments.clone(),
 201                                         );
 202                                 }
 203                                 "getinvoice" => {
 204                                         let amt_str = words.next();
 205                                         if amt_str.is_none() {
 206                                                 println!("ERROR: getinvoice requires an amount in millisatoshis");
 207                                                 continue;
 208                                         }
 209
 210                                         let amt_msat: Result<u64, _> = amt_str.unwrap().parse();
 211                                         if amt_msat.is_err() {
 212                                                 println!("ERROR: getinvoice provided payment amount was not a number");
 213                                                 continue;
 214                                         }
 215
 216                                         let expiry_secs_str = words.next();
 217                                         if expiry_secs_str.is_none() {
 218                                                 println!("ERROR: getinvoice requires an expiry in seconds");
 219                                                 continue;
 220                                         }
 221
 222                                         let expiry_secs: Result<u32, _> = expiry_secs_str.unwrap().parse();
 223                                         if expiry_secs.is_err() {
 224                                                 println!("ERROR: getinvoice provided expiry was not a number");
 225                                                 continue;
 226                                         }
 227
 228                                         get_invoice(
 229                                                 amt_msat.unwrap(),
 230                                                 Arc::clone(&inbound_payments),
 231                                                 &*channel_manager,
 232                                                 Arc::clone(&keys_manager),
 233                                                 network,
 234                                                 expiry_secs.unwrap(),
 235                                                 Arc::clone(&logger),
 236                                         );
 237                                 }
 238                                 "connectpeer" => {
 239                                         let peer_pubkey_and_ip_addr = words.next();
 240                                         if peer_pubkey_and_ip_addr.is_none() {
 241                                                 println!("ERROR: connectpeer requires peer connection info: `connectpeer pubkey@host:port`");
 242                                                 continue;
 243                                         }
 244                                         let (pubkey, peer_addr) =
 245                                                 match parse_peer_info(peer_pubkey_and_ip_addr.unwrap().to_string()) {
 246                                                         Ok(info) => info,
 247                                                         Err(e) => {
 248                                                                 println!("{:?}", e.into_inner().unwrap());
 249                                                                 continue;
 250                                                         }
 251                                                 };
 252                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 253                                                 .await
 254                                                 .is_ok()
 255                                         {
 256                                                 println!("SUCCESS: connected to peer {}", pubkey);
 257                                         }
 258                                 }
 259                                 "listchannels" => list_channels(&channel_manager, &network_graph),
 260                                 "listpayments" => {
 261                                         list_payments(inbound_payments.clone(), outbound_payments.clone())
 262                                 }
 263                                 "closechannel" => {
 264                                         let channel_id_str = words.next();
 265                                         if channel_id_str.is_none() {
 266                                                 println!("ERROR: closechannel requires a channel ID: `closechannel <channel_id> <peer_pubkey>`");
 267                                                 continue;
 268                                         }
 269                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 270                                         if channel_id_vec.is_none() || channel_id_vec.as_ref().unwrap().len() != 32 {
 271                                                 println!("ERROR: couldn't parse channel_id");
 272                                                 continue;
 273                                         }
 274                                         let mut channel_id = [0; 32];
 275                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 276
 277                                         let peer_pubkey_str = words.next();
 278                                         if peer_pubkey_str.is_none() {
 279                                                 println!("ERROR: closechannel requires a peer pubkey: `closechannel <channel_id> <peer_pubkey>`");
 280                                                 continue;
 281                                         }
 282                                         let peer_pubkey_vec = match hex_utils::to_vec(peer_pubkey_str.unwrap()) {
 283                                                 Some(peer_pubkey_vec) => peer_pubkey_vec,
 284                                                 None => {
 285                                                         println!("ERROR: couldn't parse peer_pubkey");
 286                                                         continue;
 287                                                 }
 288                                         };
 289                                         let peer_pubkey = match PublicKey::from_slice(&peer_pubkey_vec) {
 290                                                 Ok(peer_pubkey) => peer_pubkey,
 291                                                 Err(_) => {
 292                                                         println!("ERROR: couldn't parse peer_pubkey");
 293                                                         continue;
 294                                                 }
 295                                         };
 296
 297                                         close_channel(channel_id, peer_pubkey, channel_manager.clone());
 298                                 }
 299                                 "forceclosechannel" => {
 300                                         let channel_id_str = words.next();
 301                                         if channel_id_str.is_none() {
 302                                                 println!("ERROR: forceclosechannel requires a channel ID: `forceclosechannel <channel_id> <peer_pubkey>`");
 303                                                 continue;
 304                                         }
 305                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 306                                         if channel_id_vec.is_none() || channel_id_vec.as_ref().unwrap().len() != 32 {
 307                                                 println!("ERROR: couldn't parse channel_id");
 308                                                 continue;
 309                                         }
 310                                         let mut channel_id = [0; 32];
 311                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 312
 313                                         let peer_pubkey_str = words.next();
 314                                         if peer_pubkey_str.is_none() {
 315                                                 println!("ERROR: forceclosechannel requires a peer pubkey: `forceclosechannel <channel_id> <peer_pubkey>`");
 316                                                 continue;
 317                                         }
 318                                         let peer_pubkey_vec = match hex_utils::to_vec(peer_pubkey_str.unwrap()) {
 319                                                 Some(peer_pubkey_vec) => peer_pubkey_vec,
 320                                                 None => {
 321                                                         println!("ERROR: couldn't parse peer_pubkey");
 322                                                         continue;
 323                                                 }
 324                                         };
 325                                         let peer_pubkey = match PublicKey::from_slice(&peer_pubkey_vec) {
 326                                                 Ok(peer_pubkey) => peer_pubkey,
 327                                                 Err(_) => {
 328                                                         println!("ERROR: couldn't parse peer_pubkey");
 329                                                         continue;
 330                                                 }
 331                                         };
 332
 333                                         force_close_channel(channel_id, peer_pubkey, channel_manager.clone());
 334                                 }
 335                                 "nodeinfo" => node_info(&channel_manager, &peer_manager),
 336                                 "listpeers" => list_peers(peer_manager.clone()),
 337                                 "signmessage" => {
 338                                         const MSG_STARTPOS: usize = "signmessage".len() + 1;
 339                                         if line.as_bytes().len() <= MSG_STARTPOS {
 340                                                 println!("ERROR: signmsg requires a message");
 341                                                 continue;
 342                                         }
 343                                         println!(
 344                                                 "{:?}",
 345                                                 lightning::util::message_signing::sign(
 346                                                         &line.as_bytes()[MSG_STARTPOS..],
 347                                                         &keys_manager.get_node_secret(Recipient::Node).unwrap()
 348                                                 )
 349                                         );
 350                                 }
 351                                 "sendonionmessage" => {
 352                                         let path_pks_str = words.next();
 353                                         if path_pks_str.is_none() {
 354                                                 println!(
 355                                                         "ERROR: sendonionmessage requires at least one node id for the path"
 356                                                 );
 357                                                 continue;
 358                                         }
 359                                         let mut node_pks = Vec::new();
 360                                         let mut errored = false;
 361                                         for pk_str in path_pks_str.unwrap().split(",") {
 362                                                 let node_pubkey_vec = match hex_utils::to_vec(pk_str) {
 363                                                         Some(peer_pubkey_vec) => peer_pubkey_vec,
 364                                                         None => {
 365                                                                 println!("ERROR: couldn't parse peer_pubkey");
 366                                                                 errored = true;
 367                                                                 break;
 368                                                         }
 369                                                 };
 370                                                 let node_pubkey = match PublicKey::from_slice(&node_pubkey_vec) {
 371                                                         Ok(peer_pubkey) => peer_pubkey,
 372                                                         Err(_) => {
 373                                                                 println!("ERROR: couldn't parse peer_pubkey");
 374                                                                 errored = true;
 375                                                                 break;
 376                                                         }
 377                                                 };
 378                                                 node_pks.push(node_pubkey);
 379                                         }
 380                                         if errored {
 381                                                 continue;
 382                                         }
 383                                         let tlv_type = match words.next().map(|ty_str| ty_str.parse()) {
 384                                                 Some(Ok(ty)) if ty >= 64 => ty,
 385                                                 _ => {
 386                                                         println!("Need an integral message type above 64");
 387                                                         continue;
 388                                                 }
 389                                         };
 390                                         let data = match words.next().map(|s| hex_utils::to_vec(s)) {
 391                                                 Some(Some(data)) => data,
 392                                                 _ => {
 393                                                         println!("Need a hex data string");
 394                                                         continue;
 395                                                 }
 396                                         };
 397                                         let destination_pk = node_pks.pop().unwrap();
 398                                         match onion_messenger.send_onion_message(
 399                                                 &node_pks,
 400                                                 Destination::Node(destination_pk),
 401                                                 OnionMessageContents::Custom(UserOnionMessageContents { tlv_type, data }),
 402                                                 None,
 403                                         ) {
 404                                                 Ok(()) => println!("SUCCESS: forwarded onion message to first hop"),
 405                                                 Err(e) => println!("ERROR: failed to send onion message: {:?}", e),
 406                                         }
 407                                 }
 408                                 "quit" | "exit" => break,
 409                                 _ => println!("Unknown command. See `\"help\" for available commands."),
 410                         }
 411                 }
 412         }
 413 }
 414
 415 fn help() {
 416         let package_version = env!("CARGO_PKG_VERSION");
 417         let package_name = env!("CARGO_PKG_NAME");
 418         println!("\nVERSION:");
 419         println!("  {} v{}", package_name, package_version);
 420         println!("\nUSAGE:");
 421         println!("  Command [arguments]");
 422         println!("\nCOMMANDS:");
 423         println!("  help\tShows a list of commands.");
 424         println!("  quit\tClose the application.");
 425         println!("\n  Channels:");
 426         println!("      openchannel pubkey@host:port <amt_satoshis> [--public]");
 427         println!("      closechannel <channel_id> <peer_pubkey>");
 428         println!("      forceclosechannel <channel_id> <peer_pubkey>");
 429         println!("      listchannels");
 430         println!("\n  Peers:");
 431         println!("      connectpeer pubkey@host:port");
 432         println!("      listpeers");
 433         println!("\n  Payments:");
 434         println!("      sendpayment <invoice>");
 435         println!("      keysend <dest_pubkey> <amt_msats>");
 436         println!("      listpayments");
 437         println!("\n  Invoices:");
 438         println!("      getinvoice <amt_msats> <expiry_secs>");
 439         println!("\n  Other:");
 440         println!("      signmessage <message>");
 441         println!(
 442                 "      sendonionmessage <node_id_1,node_id_2,..,destination_node_id> <type> <hex_bytes>"
 443         );
 444         println!("      nodeinfo");
 445 }
 446
 447 fn node_info(channel_manager: &Arc<ChannelManager>, peer_manager: &Arc<PeerManager>) {
 448         println!("\t{{");
 449         println!("\t\t node_pubkey: {}", channel_manager.get_our_node_id());
 450         let chans = channel_manager.list_channels();
 451         println!("\t\t num_channels: {}", chans.len());
 452         println!("\t\t num_usable_channels: {}", chans.iter().filter(|c| c.is_usable).count());
 453         let local_balance_msat = chans.iter().map(|c| c.balance_msat).sum::<u64>();
 454         println!("\t\t local_balance_msat: {}", local_balance_msat);
 455         println!("\t\t num_peers: {}", peer_manager.get_peer_node_ids().len());
 456         println!("\t}},");
 457 }
 458
 459 fn list_peers(peer_manager: Arc<PeerManager>) {
 460         println!("\t{{");
 461         for pubkey in peer_manager.get_peer_node_ids() {
 462                 println!("\t\t pubkey: {}", pubkey);
 463         }
 464         println!("\t}},");
 465 }
 466
 467 fn list_channels(channel_manager: &Arc<ChannelManager>, network_graph: &Arc<NetworkGraph>) {
 468         print!("[");
 469         for chan_info in channel_manager.list_channels() {
 470                 println!("");
 471                 println!("\t{{");
 472                 println!("\t\tchannel_id: {},", hex_utils::hex_str(&chan_info.channel_id[..]));
 473                 if let Some(funding_txo) = chan_info.funding_txo {
 474                         println!("\t\tfunding_txid: {},", funding_txo.txid);
 475                 }
 476
 477                 println!(
 478                         "\t\tpeer_pubkey: {},",
 479                         hex_utils::hex_str(&chan_info.counterparty.node_id.serialize())
 480                 );
 481                 if let Some(node_info) = network_graph
 482                         .read_only()
 483                         .nodes()
 484                         .get(&NodeId::from_pubkey(&chan_info.counterparty.node_id))
 485                 {
 486                         if let Some(announcement) = &node_info.announcement_info {
 487                                 println!("\t\tpeer_alias: {}", announcement.alias);
 488                         }
 489                 }
 490
 491                 if let Some(id) = chan_info.short_channel_id {
 492                         println!("\t\tshort_channel_id: {},", id);
 493                 }
 494                 println!("\t\tis_channel_ready: {},", chan_info.is_channel_ready);
 495                 println!("\t\tchannel_value_satoshis: {},", chan_info.channel_value_satoshis);
 496                 println!("\t\tlocal_balance_msat: {},", chan_info.balance_msat);
 497                 if chan_info.is_usable {
 498                         println!("\t\tavailable_balance_for_send_msat: {},", chan_info.outbound_capacity_msat);
 499                         println!("\t\tavailable_balance_for_recv_msat: {},", chan_info.inbound_capacity_msat);
 500                 }
 501                 println!("\t\tchannel_can_send_payments: {},", chan_info.is_usable);
 502                 println!("\t\tpublic: {},", chan_info.is_public);
 503                 println!("\t}},");
 504         }
 505         println!("]");
 506 }
 507
 508 fn list_payments(inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage) {
 509         let inbound = inbound_payments.lock().unwrap();
 510         let outbound = outbound_payments.lock().unwrap();
 511         print!("[");
 512         for (payment_hash, payment_info) in inbound.deref() {
 513                 println!("");
 514                 println!("\t{{");
 515                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 516                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 517                 println!("\t\thtlc_direction: inbound,");
 518                 println!(
 519                         "\t\thtlc_status: {},",
 520                         match payment_info.status {
 521                                 HTLCStatus::Pending => "pending",
 522                                 HTLCStatus::Succeeded => "succeeded",
 523                                 HTLCStatus::Failed => "failed",
 524                         }
 525                 );
 526
 527                 println!("\t}},");
 528         }
 529
 530         for (payment_hash, payment_info) in outbound.deref() {
 531                 println!("");
 532                 println!("\t{{");
 533                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 534                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 535                 println!("\t\thtlc_direction: outbound,");
 536                 println!(
 537                         "\t\thtlc_status: {},",
 538                         match payment_info.status {
 539                                 HTLCStatus::Pending => "pending",
 540                                 HTLCStatus::Succeeded => "succeeded",
 541                                 HTLCStatus::Failed => "failed",
 542                         }
 543                 );
 544
 545                 println!("\t}},");
 546         }
 547         println!("]");
 548 }
 549
 550 pub(crate) async fn connect_peer_if_necessary(
 551         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 552 ) -> Result<(), ()> {
 553         for node_pubkey in peer_manager.get_peer_node_ids() {
 554                 if node_pubkey == pubkey {
 555                         return Ok(());
 556                 }
 557         }
 558         let res = do_connect_peer(pubkey, peer_addr, peer_manager).await;
 559         if res.is_err() {
 560                 println!("ERROR: failed to connect to peer");
 561         }
 562         res
 563 }
 564
 565 pub(crate) async fn do_connect_peer(
 566         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 567 ) -> Result<(), ()> {
 568         match lightning_net_tokio::connect_outbound(Arc::clone(&peer_manager), pubkey, peer_addr).await
 569         {
 570                 Some(connection_closed_future) => {
 571                         let mut connection_closed_future = Box::pin(connection_closed_future);
 572                         loop {
 573                                 match futures::poll!(&mut connection_closed_future) {
 574                                         std::task::Poll::Ready(_) => {
 575                                                 return Err(());
 576                                         }
 577                                         std::task::Poll::Pending => {}
 578                                 }
 579                                 // Avoid blocking the tokio context by sleeping a bit
 580                                 match peer_manager.get_peer_node_ids().iter().find(|id| **id == pubkey) {
 581                                         Some(_) => return Ok(()),
 582                                         None => tokio::time::sleep(Duration::from_millis(10)).await,
 583                                 }
 584                         }
 585                 }
 586                 None => Err(()),
 587         }
 588 }
 589
 590 fn open_channel(
 591         peer_pubkey: PublicKey, channel_amt_sat: u64, announced_channel: bool,
 592         channel_manager: Arc<ChannelManager>,
 593 ) -> Result<(), ()> {
 594         let config = UserConfig {
 595                 channel_handshake_limits: ChannelHandshakeLimits {
 596                         // lnd's max to_self_delay is 2016, so we want to be compatible.
 597                         their_to_self_delay: 2016,
 598                         ..Default::default()
 599                 },
 600                 channel_handshake_config: ChannelHandshakeConfig {
 601                         announced_channel,
 602                         ..Default::default()
 603                 },
 604                 ..Default::default()
 605         };
 606
 607         match channel_manager.create_channel(peer_pubkey, channel_amt_sat, 0, 0, Some(config)) {
 608                 Ok(_) => {
 609                         println!("EVENT: initiated channel with peer {}. ", peer_pubkey);
 610                         return Ok(());
 611                 }
 612                 Err(e) => {
 613                         println!("ERROR: failed to open channel: {:?}", e);
 614                         return Err(());
 615                 }
 616         }
 617 }
 618
 619 fn send_payment<E: EventHandler>(
 620         invoice_payer: &InvoicePayer<E>, invoice: &Invoice, payment_storage: PaymentInfoStorage,
 621 ) {
 622         let status = match invoice_payer.pay_invoice(invoice) {
 623                 Ok(_payment_id) => {
 624                         let payee_pubkey = invoice.recover_payee_pub_key();
 625                         let amt_msat = invoice.amount_milli_satoshis().unwrap();
 626                         println!("EVENT: initiated sending {} msats to {}", amt_msat, payee_pubkey);
 627                         print!("> ");
 628                         HTLCStatus::Pending
 629                 }
 630                 Err(PaymentError::Invoice(e)) => {
 631                         println!("ERROR: invalid invoice: {}", e);
 632                         print!("> ");
 633                         return;
 634                 }
 635                 Err(PaymentError::Routing(e)) => {
 636                         println!("ERROR: failed to find route: {}", e.err);
 637                         print!("> ");
 638                         return;
 639                 }
 640                 Err(PaymentError::Sending(e)) => {
 641                         println!("ERROR: failed to send payment: {:?}", e);
 642                         print!("> ");
 643                         HTLCStatus::Failed
 644                 }
 645         };
 646         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 647         let payment_secret = Some(invoice.payment_secret().clone());
 648
 649         let mut payments = payment_storage.lock().unwrap();
 650         payments.insert(
 651                 payment_hash,
 652                 PaymentInfo {
 653                         preimage: None,
 654                         secret: payment_secret,
 655                         status,
 656                         amt_msat: MillisatAmount(invoice.amount_milli_satoshis()),
 657                 },
 658         );
 659 }
 660
 661 fn keysend<E: EventHandler, K: KeysInterface>(
 662         invoice_payer: &InvoicePayer<E>, payee_pubkey: PublicKey, amt_msat: u64, keys: &K,
 663         payment_storage: PaymentInfoStorage,
 664 ) {
 665         let payment_preimage = keys.get_secure_random_bytes();
 666
 667         let status = match invoice_payer.pay_pubkey(
 668                 payee_pubkey,
 669                 PaymentPreimage(payment_preimage),
 670                 amt_msat,
 671                 40,
 672         ) {
 673                 Ok(_payment_id) => {
 674                         println!("EVENT: initiated sending {} msats to {}", amt_msat, payee_pubkey);
 675                         print!("> ");
 676                         HTLCStatus::Pending
 677                 }
 678                 Err(PaymentError::Invoice(e)) => {
 679                         println!("ERROR: invalid payee: {}", e);
 680                         print!("> ");
 681                         return;
 682                 }
 683                 Err(PaymentError::Routing(e)) => {
 684                         println!("ERROR: failed to find route: {}", e.err);
 685                         print!("> ");
 686                         return;
 687                 }
 688                 Err(PaymentError::Sending(e)) => {
 689                         println!("ERROR: failed to send payment: {:?}", e);
 690                         print!("> ");
 691                         HTLCStatus::Failed
 692                 }
 693         };
 694
 695         let mut payments = payment_storage.lock().unwrap();
 696         payments.insert(
 697                 PaymentHash(Sha256::hash(&payment_preimage).into_inner()),
 698                 PaymentInfo {
 699                         preimage: None,
 700                         secret: None,
 701                         status,
 702                         amt_msat: MillisatAmount(Some(amt_msat)),
 703                 },
 704         );
 705 }
 706
 707 fn get_invoice(
 708         amt_msat: u64, payment_storage: PaymentInfoStorage, channel_manager: &ChannelManager,
 709         keys_manager: Arc<KeysManager>, network: Network, expiry_secs: u32,
 710         logger: Arc<disk::FilesystemLogger>,
 711 ) {
 712         let mut payments = payment_storage.lock().unwrap();
 713         let currency = match network {
 714                 Network::Bitcoin => Currency::Bitcoin,
 715                 Network::Testnet => Currency::BitcoinTestnet,
 716                 Network::Regtest => Currency::Regtest,
 717                 Network::Signet => Currency::Signet,
 718         };
 719         let invoice = match utils::create_invoice_from_channelmanager(
 720                 channel_manager,
 721                 keys_manager,
 722                 logger,
 723                 currency,
 724                 Some(amt_msat),
 725                 "ldk-tutorial-node".to_string(),
 726                 expiry_secs,
 727         ) {
 728                 Ok(inv) => {
 729                         println!("SUCCESS: generated invoice: {}", inv);
 730                         inv
 731                 }
 732                 Err(e) => {
 733                         println!("ERROR: failed to create invoice: {:?}", e);
 734                         return;
 735                 }
 736         };
 737
 738         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 739         payments.insert(
 740                 payment_hash,
 741                 PaymentInfo {
 742                         preimage: None,
 743                         secret: Some(invoice.payment_secret().clone()),
 744                         status: HTLCStatus::Pending,
 745                         amt_msat: MillisatAmount(Some(amt_msat)),
 746                 },
 747         );
 748 }
 749
 750 fn close_channel(
 751         channel_id: [u8; 32], counterparty_node_id: PublicKey, channel_manager: Arc<ChannelManager>,
 752 ) {
 753         match channel_manager.close_channel(&channel_id, &counterparty_node_id) {
 754                 Ok(()) => println!("EVENT: initiating channel close"),
 755                 Err(e) => println!("ERROR: failed to close channel: {:?}", e),
 756         }
 757 }
 758
 759 fn force_close_channel(
 760         channel_id: [u8; 32], counterparty_node_id: PublicKey, channel_manager: Arc<ChannelManager>,
 761 ) {
 762         match channel_manager.force_close_broadcasting_latest_txn(&channel_id, &counterparty_node_id) {
 763                 Ok(()) => println!("EVENT: initiating channel force-close"),
 764                 Err(e) => println!("ERROR: failed to force-close channel: {:?}", e),
 765         }
 766 }
 767
 768 pub(crate) fn parse_peer_info(
 769         peer_pubkey_and_ip_addr: String,
 770 ) -> Result<(PublicKey, SocketAddr), std::io::Error> {
 771         let mut pubkey_and_addr = peer_pubkey_and_ip_addr.split("@");
 772         let pubkey = pubkey_and_addr.next();
 773         let peer_addr_str = pubkey_and_addr.next();
 774         if peer_addr_str.is_none() {
 775                 return Err(std::io::Error::new(
 776                         std::io::ErrorKind::Other,
 777                         "ERROR: incorrectly formatted peer info. Should be formatted as: `pubkey@host:port`",
 778                 ));
 779         }
 780
 781         let peer_addr = peer_addr_str.unwrap().to_socket_addrs().map(|mut r| r.next());
 782         if peer_addr.is_err() || peer_addr.as_ref().unwrap().is_none() {
 783                 return Err(std::io::Error::new(
 784                         std::io::ErrorKind::Other,
 785                         "ERROR: couldn't parse pubkey@host:port into a socket address",
 786                 ));
 787         }
 788
 789         let pubkey = hex_utils::to_compressed_pubkey(pubkey.unwrap());
 790         if pubkey.is_none() {
 791                 return Err(std::io::Error::new(
 792                         std::io::ErrorKind::Other,
 793                         "ERROR: unable to parse given pubkey for node",
 794                 ));
 795         }
 796
 797         Ok((pubkey.unwrap(), peer_addr.unwrap().unwrap()))
 798 }