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

   1 use crate::disk;
   2 use crate::hex_utils;
   3 use crate::{
   4         ChannelManager, HTLCStatus, InvoicePayer, MillisatAmount, PaymentInfo, PaymentInfoStorage,
   5         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::key::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::network_graph::{NetworkGraph, NodeId};
  15 use lightning::util::config::{ChannelConfig, 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                                         get_invoice(
 285                                                 amt_msat.unwrap(),
 286                                                 inbound_payments.clone(),
 287                                                 channel_manager.clone(),
 288                                                 keys_manager.clone(),
 289                                                 network,
 290                                         );
 291                                 }
 292                                 "connectpeer" => {
 293                                         let peer_pubkey_and_ip_addr = words.next();
 294                                         if peer_pubkey_and_ip_addr.is_none() {
 295                                                 println!("ERROR: connectpeer requires peer connection info: `connectpeer pubkey@host:port`");
 296                                                 continue;
 297                                         }
 298                                         let (pubkey, peer_addr) =
 299                                                 match parse_peer_info(peer_pubkey_and_ip_addr.unwrap().to_string()) {
 300                                                         Ok(info) => info,
 301                                                         Err(e) => {
 302                                                                 println!("{:?}", e.into_inner().unwrap());
 303                                                                 continue;
 304                                                         }
 305                                                 };
 306                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 307                                                 .await
 308                                                 .is_ok()
 309                                         {
 310                                                 println!("SUCCESS: connected to peer {}", pubkey);
 311                                         }
 312                                 }
 313                                 "listchannels" => list_channels(&channel_manager, &network_graph),
 314                                 "listpayments" => {
 315                                         list_payments(inbound_payments.clone(), outbound_payments.clone())
 316                                 }
 317                                 "closechannel" => {
 318                                         let channel_id_str = words.next();
 319                                         if channel_id_str.is_none() {
 320                                                 println!("ERROR: closechannel requires a channel ID: `closechannel <channel_id>`");
 321                                                 continue;
 322                                         }
 323                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 324                                         if channel_id_vec.is_none() || channel_id_vec.as_ref().unwrap().len() != 32 {
 325                                                 println!("ERROR: couldn't parse channel_id");
 326                                                 continue;
 327                                         }
 328                                         let mut channel_id = [0; 32];
 329                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 330                                         close_channel(channel_id, channel_manager.clone());
 331                                 }
 332                                 "forceclosechannel" => {
 333                                         let channel_id_str = words.next();
 334                                         if channel_id_str.is_none() {
 335                                                 println!("ERROR: forceclosechannel requires a channel ID: `forceclosechannel <channel_id>`");
 336                                                 continue;
 337                                         }
 338                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 339                                         if channel_id_vec.is_none() || channel_id_vec.as_ref().unwrap().len() != 32 {
 340                                                 println!("ERROR: couldn't parse channel_id");
 341                                                 continue;
 342                                         }
 343                                         let mut channel_id = [0; 32];
 344                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 345                                         force_close_channel(channel_id, channel_manager.clone());
 346                                 }
 347                                 "nodeinfo" => node_info(&channel_manager, &peer_manager),
 348                                 "listpeers" => list_peers(peer_manager.clone()),
 349                                 "signmessage" => {
 350                                         const MSG_STARTPOS: usize = "signmessage".len() + 1;
 351                                         if line.as_bytes().len() <= MSG_STARTPOS {
 352                                                 println!("ERROR: signmsg requires a message");
 353                                                 continue;
 354                                         }
 355                                         println!(
 356                                                 "{:?}",
 357                                                 lightning::util::message_signing::sign(
 358                                                         &line.as_bytes()[MSG_STARTPOS..],
 359                                                         &keys_manager.get_node_secret(Recipient::Node).unwrap()
 360                                                 )
 361                                         );
 362                                 }
 363                                 _ => println!("Unknown command. See `\"help\" for available commands."),
 364                         }
 365                 }
 366         }
 367 }
 368
 369 fn help() {
 370         println!("openchannel pubkey@host:port <amt_satoshis>");
 371         println!("sendpayment <invoice>");
 372         println!("keysend <dest_pubkey> <amt_msat>");
 373         println!("getinvoice <amt_millisatoshis>");
 374         println!("connectpeer pubkey@host:port");
 375         println!("listchannels");
 376         println!("listpayments");
 377         println!("closechannel <channel_id>");
 378         println!("forceclosechannel <channel_id>");
 379         println!("nodeinfo");
 380         println!("listpeers");
 381         println!("signmessage <message>");
 382 }
 383
 384 fn node_info(channel_manager: &Arc<ChannelManager>, peer_manager: &Arc<PeerManager>) {
 385         println!("\t{{");
 386         println!("\t\t node_pubkey: {}", channel_manager.get_our_node_id());
 387         let chans = channel_manager.list_channels();
 388         println!("\t\t num_channels: {}", chans.len());
 389         println!("\t\t num_usable_channels: {}", chans.iter().filter(|c| c.is_usable).count());
 390         let local_balance_msat = chans.iter().map(|c| c.balance_msat).sum::<u64>();
 391         println!("\t\t local_balance_msat: {}", local_balance_msat);
 392         println!("\t\t num_peers: {}", peer_manager.get_peer_node_ids().len());
 393         println!("\t}},");
 394 }
 395
 396 fn list_peers(peer_manager: Arc<PeerManager>) {
 397         println!("\t{{");
 398         for pubkey in peer_manager.get_peer_node_ids() {
 399                 println!("\t\t pubkey: {}", pubkey);
 400         }
 401         println!("\t}},");
 402 }
 403
 404 /// Takes some untrusted bytes and returns a sanitized string that is safe to print
 405 fn sanitize_string(bytes: &[u8]) -> String {
 406         let mut ret = String::with_capacity(bytes.len());
 407         // We should really support some sane subset of UTF-8 here, but limiting to printable ASCII
 408         // instead makes this trivial.
 409         for b in bytes {
 410                 if *b >= 0x20 && *b <= 0x7e {
 411                         ret.push(*b as char);
 412                 }
 413         }
 414         ret
 415 }
 416
 417 fn list_channels(channel_manager: &Arc<ChannelManager>, network_graph: &Arc<NetworkGraph>) {
 418         print!("[");
 419         for chan_info in channel_manager.list_channels() {
 420                 println!("");
 421                 println!("\t{{");
 422                 println!("\t\tchannel_id: {},", hex_utils::hex_str(&chan_info.channel_id[..]));
 423                 if let Some(funding_txo) = chan_info.funding_txo {
 424                         println!("\t\tfunding_txid: {},", funding_txo.txid);
 425                 }
 426
 427                 println!(
 428                         "\t\tpeer_pubkey: {},",
 429                         hex_utils::hex_str(&chan_info.counterparty.node_id.serialize())
 430                 );
 431                 if let Some(node_info) = network_graph
 432                         .read_only()
 433                         .nodes()
 434                         .get(&NodeId::from_pubkey(&chan_info.counterparty.node_id))
 435                 {
 436                         if let Some(announcement) = &node_info.announcement_info {
 437                                 println!("\t\tpeer_alias: {}", sanitize_string(&announcement.alias));
 438                         }
 439                 }
 440
 441                 if let Some(id) = chan_info.short_channel_id {
 442                         println!("\t\tshort_channel_id: {},", id);
 443                 }
 444                 println!("\t\tis_confirmed_onchain: {},", chan_info.is_funding_locked);
 445                 println!("\t\tchannel_value_satoshis: {},", chan_info.channel_value_satoshis);
 446                 println!("\t\tlocal_balance_msat: {},", chan_info.balance_msat);
 447                 if chan_info.is_usable {
 448                         println!("\t\tavailable_balance_for_send_msat: {},", chan_info.outbound_capacity_msat);
 449                         println!("\t\tavailable_balance_for_recv_msat: {},", chan_info.inbound_capacity_msat);
 450                 }
 451                 println!("\t\tchannel_can_send_payments: {},", chan_info.is_usable);
 452                 println!("\t\tpublic: {},", chan_info.is_public);
 453                 println!("\t}},");
 454         }
 455         println!("]");
 456 }
 457
 458 fn list_payments(inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage) {
 459         let inbound = inbound_payments.lock().unwrap();
 460         let outbound = outbound_payments.lock().unwrap();
 461         print!("[");
 462         for (payment_hash, payment_info) in inbound.deref() {
 463                 println!("");
 464                 println!("\t{{");
 465                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 466                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 467                 println!("\t\thtlc_direction: inbound,");
 468                 println!(
 469                         "\t\thtlc_status: {},",
 470                         match payment_info.status {
 471                                 HTLCStatus::Pending => "pending",
 472                                 HTLCStatus::Succeeded => "succeeded",
 473                                 HTLCStatus::Failed => "failed",
 474                         }
 475                 );
 476
 477                 println!("\t}},");
 478         }
 479
 480         for (payment_hash, payment_info) in outbound.deref() {
 481                 println!("");
 482                 println!("\t{{");
 483                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 484                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 485                 println!("\t\thtlc_direction: outbound,");
 486                 println!(
 487                         "\t\thtlc_status: {},",
 488                         match payment_info.status {
 489                                 HTLCStatus::Pending => "pending",
 490                                 HTLCStatus::Succeeded => "succeeded",
 491                                 HTLCStatus::Failed => "failed",
 492                         }
 493                 );
 494
 495                 println!("\t}},");
 496         }
 497         println!("]");
 498 }
 499
 500 pub(crate) async fn connect_peer_if_necessary(
 501         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 502 ) -> Result<(), ()> {
 503         for node_pubkey in peer_manager.get_peer_node_ids() {
 504                 if node_pubkey == pubkey {
 505                         return Ok(());
 506                 }
 507         }
 508         let res = do_connect_peer(pubkey, peer_addr, peer_manager).await;
 509         if res.is_err() {
 510                 println!("ERROR: failed to connect to peer");
 511         }
 512         res
 513 }
 514
 515 pub(crate) async fn do_connect_peer(
 516         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 517 ) -> Result<(), ()> {
 518         match lightning_net_tokio::connect_outbound(Arc::clone(&peer_manager), pubkey, peer_addr).await
 519         {
 520                 Some(connection_closed_future) => {
 521                         let mut connection_closed_future = Box::pin(connection_closed_future);
 522                         loop {
 523                                 match futures::poll!(&mut connection_closed_future) {
 524                                         std::task::Poll::Ready(_) => {
 525                                                 return Err(());
 526                                         }
 527                                         std::task::Poll::Pending => {}
 528                                 }
 529                                 // Avoid blocking the tokio context by sleeping a bit
 530                                 match peer_manager.get_peer_node_ids().iter().find(|id| **id == pubkey) {
 531                                         Some(_) => return Ok(()),
 532                                         None => tokio::time::sleep(Duration::from_millis(10)).await,
 533                                 }
 534                         }
 535                 }
 536                 None => Err(()),
 537         }
 538 }
 539
 540 fn open_channel(
 541         peer_pubkey: PublicKey, channel_amt_sat: u64, announced_channel: bool,
 542         channel_manager: Arc<ChannelManager>,
 543 ) -> Result<(), ()> {
 544         let config = UserConfig {
 545                 peer_channel_config_limits: ChannelHandshakeLimits {
 546                         // lnd's max to_self_delay is 2016, so we want to be compatible.
 547                         their_to_self_delay: 2016,
 548                         ..Default::default()
 549                 },
 550                 channel_options: ChannelConfig { announced_channel, ..Default::default() },
 551                 ..Default::default()
 552         };
 553
 554         match channel_manager.create_channel(peer_pubkey, channel_amt_sat, 0, 0, Some(config)) {
 555                 Ok(_) => {
 556                         println!("EVENT: initiated channel with peer {}. ", peer_pubkey);
 557                         return Ok(());
 558                 }
 559                 Err(e) => {
 560                         println!("ERROR: failed to open channel: {:?}", e);
 561                         return Err(());
 562                 }
 563         }
 564 }
 565
 566 fn send_payment<E: EventHandler>(
 567         invoice_payer: &InvoicePayer<E>, invoice: &Invoice, payment_storage: PaymentInfoStorage,
 568 ) {
 569         let status = match invoice_payer.pay_invoice(invoice) {
 570                 Ok(_payment_id) => {
 571                         let payee_pubkey = invoice.recover_payee_pub_key();
 572                         let amt_msat = invoice.amount_milli_satoshis().unwrap();
 573                         println!("EVENT: initiated sending {} msats to {}", amt_msat, payee_pubkey);
 574                         print!("> ");
 575                         HTLCStatus::Pending
 576                 }
 577                 Err(PaymentError::Invoice(e)) => {
 578                         println!("ERROR: invalid invoice: {}", e);
 579                         print!("> ");
 580                         return;
 581                 }
 582                 Err(PaymentError::Routing(e)) => {
 583                         println!("ERROR: failed to find route: {}", e.err);
 584                         print!("> ");
 585                         return;
 586                 }
 587                 Err(PaymentError::Sending(e)) => {
 588                         println!("ERROR: failed to send payment: {:?}", e);
 589                         print!("> ");
 590                         HTLCStatus::Failed
 591                 }
 592         };
 593         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 594         let payment_secret = Some(invoice.payment_secret().clone());
 595
 596         let mut payments = payment_storage.lock().unwrap();
 597         payments.insert(
 598                 payment_hash,
 599                 PaymentInfo {
 600                         preimage: None,
 601                         secret: payment_secret,
 602                         status,
 603                         amt_msat: MillisatAmount(invoice.amount_milli_satoshis()),
 604                 },
 605         );
 606 }
 607
 608 fn keysend<E: EventHandler, K: KeysInterface>(
 609         invoice_payer: &InvoicePayer<E>, payee_pubkey: PublicKey, amt_msat: u64, keys: &K,
 610         payment_storage: PaymentInfoStorage,
 611 ) {
 612         let payment_preimage = keys.get_secure_random_bytes();
 613
 614         let status = match invoice_payer.pay_pubkey(
 615                 payee_pubkey,
 616                 PaymentPreimage(payment_preimage),
 617                 amt_msat,
 618                 40,
 619         ) {
 620                 Ok(_payment_id) => {
 621                         println!("EVENT: initiated sending {} msats to {}", amt_msat, payee_pubkey);
 622                         print!("> ");
 623                         HTLCStatus::Pending
 624                 }
 625                 Err(PaymentError::Invoice(e)) => {
 626                         println!("ERROR: invalid payee: {}", e);
 627                         print!("> ");
 628                         return;
 629                 }
 630                 Err(PaymentError::Routing(e)) => {
 631                         println!("ERROR: failed to find route: {}", e.err);
 632                         print!("> ");
 633                         return;
 634                 }
 635                 Err(PaymentError::Sending(e)) => {
 636                         println!("ERROR: failed to send payment: {:?}", e);
 637                         print!("> ");
 638                         HTLCStatus::Failed
 639                 }
 640         };
 641
 642         let mut payments = payment_storage.lock().unwrap();
 643         payments.insert(
 644                 PaymentHash(Sha256::hash(&payment_preimage).into_inner()),
 645                 PaymentInfo {
 646                         preimage: None,
 647                         secret: None,
 648                         status,
 649                         amt_msat: MillisatAmount(Some(amt_msat)),
 650                 },
 651         );
 652 }
 653
 654 fn get_invoice(
 655         amt_msat: u64, payment_storage: PaymentInfoStorage, channel_manager: Arc<ChannelManager>,
 656         keys_manager: Arc<KeysManager>, network: Network,
 657 ) {
 658         let mut payments = payment_storage.lock().unwrap();
 659         let currency = match network {
 660                 Network::Bitcoin => Currency::Bitcoin,
 661                 Network::Testnet => Currency::BitcoinTestnet,
 662                 Network::Regtest => Currency::Regtest,
 663                 Network::Signet => Currency::Signet,
 664         };
 665         let invoice = match utils::create_invoice_from_channelmanager(
 666                 &channel_manager,
 667                 keys_manager,
 668                 currency,
 669                 Some(amt_msat),
 670                 "ldk-tutorial-node".to_string(),
 671         ) {
 672                 Ok(inv) => {
 673                         println!("SUCCESS: generated invoice: {}", inv);
 674                         inv
 675                 }
 676                 Err(e) => {
 677                         println!("ERROR: failed to create invoice: {:?}", e);
 678                         return;
 679                 }
 680         };
 681
 682         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 683         payments.insert(
 684                 payment_hash,
 685                 PaymentInfo {
 686                         preimage: None,
 687                         secret: Some(invoice.payment_secret().clone()),
 688                         status: HTLCStatus::Pending,
 689                         amt_msat: MillisatAmount(Some(amt_msat)),
 690                 },
 691         );
 692 }
 693
 694 fn close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 695         match channel_manager.close_channel(&channel_id) {
 696                 Ok(()) => println!("EVENT: initiating channel close"),
 697                 Err(e) => println!("ERROR: failed to close channel: {:?}", e),
 698         }
 699 }
 700
 701 fn force_close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
 702         match channel_manager.force_close_channel(&channel_id) {
 703                 Ok(()) => println!("EVENT: initiating channel force-close"),
 704                 Err(e) => println!("ERROR: failed to force-close channel: {:?}", e),
 705         }
 706 }
 707
 708 pub(crate) fn parse_peer_info(
 709         peer_pubkey_and_ip_addr: String,
 710 ) -> Result<(PublicKey, SocketAddr), std::io::Error> {
 711         let mut pubkey_and_addr = peer_pubkey_and_ip_addr.split("@");
 712         let pubkey = pubkey_and_addr.next();
 713         let peer_addr_str = pubkey_and_addr.next();
 714         if peer_addr_str.is_none() || peer_addr_str.is_none() {
 715                 return Err(std::io::Error::new(
 716                         std::io::ErrorKind::Other,
 717                         "ERROR: incorrectly formatted peer info. Should be formatted as: `pubkey@host:port`",
 718                 ));
 719         }
 720
 721         let peer_addr = peer_addr_str.unwrap().to_socket_addrs().map(|mut r| r.next());
 722         if peer_addr.is_err() || peer_addr.as_ref().unwrap().is_none() {
 723                 return Err(std::io::Error::new(
 724                         std::io::ErrorKind::Other,
 725                         "ERROR: couldn't parse pubkey@host:port into a socket address",
 726                 ));
 727         }
 728
 729         let pubkey = hex_utils::to_compressed_pubkey(pubkey.unwrap());
 730         if pubkey.is_none() {
 731                 return Err(std::io::Error::new(
 732                         std::io::ErrorKind::Other,
 733                         "ERROR: unable to parse given pubkey for node",
 734                 ));
 735         }
 736
 737         Ok((pubkey.unwrap(), peer_addr.unwrap().unwrap()))
 738 }