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

   1 use crate::disk;
   2 use crate::hex_utils;
   3 use crate::{
   4         ChannelManager, HTLCStatus, MillisatAmount, NetworkGraph, OnionMessenger, 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::{EntropySource, KeysManager};
  12 use lightning::ln::channelmanager::{PaymentId, Retry};
  13 use lightning::ln::msgs::NetAddress;
  14 use lightning::ln::{PaymentHash, PaymentPreimage};
  15 use lightning::onion_message::{CustomOnionMessageContents, Destination, OnionMessageContents};
  16 use lightning::routing::gossip::NodeId;
  17 use lightning::routing::router::{PaymentParameters, RouteParameters};
  18 use lightning::util::config::{ChannelHandshakeConfig, ChannelHandshakeLimits, UserConfig};
  19 use lightning::util::ser::{Writeable, Writer};
  20 use lightning_invoice::payment::pay_invoice;
  21 use lightning_invoice::{utils, Currency, Invoice};
  22 use std::env;
  23 use std::io;
  24 use std::io::Write;
  25 use std::net::{SocketAddr, ToSocketAddrs};
  26 use std::ops::Deref;
  27 use std::path::Path;
  28 use std::str::FromStr;
  29 use std::sync::Arc;
  30 use std::time::Duration;
  31
  32 pub(crate) struct LdkUserInfo {
  33         pub(crate) bitcoind_rpc_username: String,
  34         pub(crate) bitcoind_rpc_password: String,
  35         pub(crate) bitcoind_rpc_port: u16,
  36         pub(crate) bitcoind_rpc_host: String,
  37         pub(crate) ldk_storage_dir_path: String,
  38         pub(crate) ldk_peer_listening_port: u16,
  39         pub(crate) ldk_announced_listen_addr: Vec<NetAddress>,
  40         pub(crate) ldk_announced_node_name: [u8; 32],
  41         pub(crate) network: Network,
  42 }
  43
  44 struct UserOnionMessageContents {
  45         tlv_type: u64,
  46         data: Vec<u8>,
  47 }
  48
  49 impl CustomOnionMessageContents for UserOnionMessageContents {
  50         fn tlv_type(&self) -> u64 {
  51                 self.tlv_type
  52         }
  53 }
  54
  55 impl Writeable for UserOnionMessageContents {
  56         fn write<W: Writer>(&self, w: &mut W) -> Result<(), std::io::Error> {
  57                 w.write_all(&self.data)
  58         }
  59 }
  60
  61 pub(crate) async fn poll_for_user_input(
  62         peer_manager: Arc<PeerManager>, channel_manager: Arc<ChannelManager>,
  63         keys_manager: Arc<KeysManager>, network_graph: Arc<NetworkGraph>,
  64         onion_messenger: Arc<OnionMessenger>, inbound_payments: PaymentInfoStorage,
  65         outbound_payments: PaymentInfoStorage, ldk_data_dir: String, network: Network,
  66         logger: Arc<disk::FilesystemLogger>,
  67 ) {
  68         println!(
  69                 "LDK startup successful. Enter \"help\" to view available commands. Press Ctrl-D to quit."
  70         );
  71         println!("LDK logs are available at <your-supplied-ldk-data-dir-path>/.ldk/logs");
  72         println!("Local Node ID is {}.", channel_manager.get_our_node_id());
  73         loop {
  74                 print!("> ");
  75                 io::stdout().flush().unwrap(); // Without flushing, the `>` doesn't print
  76                 let mut line = String::new();
  77                 if let Err(e) = io::stdin().read_line(&mut line) {
  78                         break println!("ERROR: {}", e);
  79                 }
  80
  81                 if line.len() == 0 {
  82                         // We hit EOF / Ctrl-D
  83                         break;
  84                 }
  85
  86                 let mut words = line.split_whitespace();
  87                 if let Some(word) = words.next() {
  88                         match word {
  89                                 "help" => help(),
  90                                 "openchannel" => {
  91                                         let peer_pubkey_and_ip_addr = words.next();
  92                                         let channel_value_sat = words.next();
  93                                         if peer_pubkey_and_ip_addr.is_none() || channel_value_sat.is_none() {
  94                                                 println!("ERROR: openchannel has 2 required arguments: `openchannel pubkey@host:port channel_amt_satoshis` [--public]");
  95                                                 continue;
  96                                         }
  97                                         let peer_pubkey_and_ip_addr = peer_pubkey_and_ip_addr.unwrap();
  98                                         let (pubkey, peer_addr) =
  99                                                 match parse_peer_info(peer_pubkey_and_ip_addr.to_string()) {
 100                                                         Ok(info) => info,
 101                                                         Err(e) => {
 102                                                                 println!("{:?}", e.into_inner().unwrap());
 103                                                                 continue;
 104                                                         }
 105                                                 };
 106
 107                                         let chan_amt_sat: Result<u64, _> = channel_value_sat.unwrap().parse();
 108                                         if chan_amt_sat.is_err() {
 109                                                 println!("ERROR: channel amount must be a number");
 110                                                 continue;
 111                                         }
 112
 113                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 114                                                 .await
 115                                                 .is_err()
 116                                         {
 117                                                 continue;
 118                                         };
 119
 120                                         let announce_channel = match words.next() {
 121                                                 Some("--public") | Some("--public=true") => true,
 122                                                 Some("--public=false") => false,
 123                                                 Some(_) => {
 124                                                         println!("ERROR: invalid `--public` command format. Valid formats: `--public`, `--public=true` `--public=false`");
 125                                                         continue;
 126                                                 }
 127                                                 None => false,
 128                                         };
 129
 130                                         if open_channel(
 131                                                 pubkey,
 132                                                 chan_amt_sat.unwrap(),
 133                                                 announce_channel,
 134                                                 channel_manager.clone(),
 135                                         )
 136                                         .is_ok()
 137                                         {
 138                                                 let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
 139                                                 let _ = disk::persist_channel_peer(
 140                                                         Path::new(&peer_data_path),
 141                                                         peer_pubkey_and_ip_addr,
 142                                                 );
 143                                         }
 144                                 }
 145                                 "sendpayment" => {
 146                                         let invoice_str = words.next();
 147                                         if invoice_str.is_none() {
 148                                                 println!("ERROR: sendpayment requires an invoice: `sendpayment <invoice>`");
 149                                                 continue;
 150                                         }
 151
 152                                         let invoice = match Invoice::from_str(invoice_str.unwrap()) {
 153                                                 Ok(inv) => inv,
 154                                                 Err(e) => {
 155                                                         println!("ERROR: invalid invoice: {:?}", e);
 156                                                         continue;
 157                                                 }
 158                                         };
 159
 160                                         send_payment(&*channel_manager, &invoice, outbound_payments.clone());
 161                                 }
 162                                 "keysend" => {
 163                                         let dest_pubkey = match words.next() {
 164                                                 Some(dest) => match hex_utils::to_compressed_pubkey(dest) {
 165                                                         Some(pk) => pk,
 166                                                         None => {
 167                                                                 println!("ERROR: couldn't parse destination pubkey");
 168                                                                 continue;
 169                                                         }
 170                                                 },
 171                                                 None => {
 172                                                         println!("ERROR: keysend requires a destination pubkey: `keysend <dest_pubkey> <amt_msat>`");
 173                                                         continue;
 174                                                 }
 175                                         };
 176                                         let amt_msat_str = match words.next() {
 177                                                 Some(amt) => amt,
 178                                                 None => {
 179                                                         println!("ERROR: keysend requires an amount in millisatoshis: `keysend <dest_pubkey> <amt_msat>`");
 180                                                         continue;
 181                                                 }
 182                                         };
 183                                         let amt_msat: u64 = match amt_msat_str.parse() {
 184                                                 Ok(amt) => amt,
 185                                                 Err(e) => {
 186                                                         println!("ERROR: couldn't parse amount_msat: {}", e);
 187                                                         continue;
 188                                                 }
 189                                         };
 190                                         keysend(
 191                                                 &*channel_manager,
 192                                                 dest_pubkey,
 193                                                 amt_msat,
 194                                                 &*keys_manager,
 195                                                 outbound_payments.clone(),
 196                                         );
 197                                 }
 198                                 "getinvoice" => {
 199                                         let amt_str = words.next();
 200                                         if amt_str.is_none() {
 201                                                 println!("ERROR: getinvoice requires an amount in millisatoshis");
 202                                                 continue;
 203                                         }
 204
 205                                         let amt_msat: Result<u64, _> = amt_str.unwrap().parse();
 206                                         if amt_msat.is_err() {
 207                                                 println!("ERROR: getinvoice provided payment amount was not a number");
 208                                                 continue;
 209                                         }
 210
 211                                         let expiry_secs_str = words.next();
 212                                         if expiry_secs_str.is_none() {
 213                                                 println!("ERROR: getinvoice requires an expiry in seconds");
 214                                                 continue;
 215                                         }
 216
 217                                         let expiry_secs: Result<u32, _> = expiry_secs_str.unwrap().parse();
 218                                         if expiry_secs.is_err() {
 219                                                 println!("ERROR: getinvoice provided expiry was not a number");
 220                                                 continue;
 221                                         }
 222
 223                                         get_invoice(
 224                                                 amt_msat.unwrap(),
 225                                                 Arc::clone(&inbound_payments),
 226                                                 &*channel_manager,
 227                                                 Arc::clone(&keys_manager),
 228                                                 network,
 229                                                 expiry_secs.unwrap(),
 230                                                 Arc::clone(&logger),
 231                                         );
 232                                 }
 233                                 "connectpeer" => {
 234                                         let peer_pubkey_and_ip_addr = words.next();
 235                                         if peer_pubkey_and_ip_addr.is_none() {
 236                                                 println!("ERROR: connectpeer requires peer connection info: `connectpeer pubkey@host:port`");
 237                                                 continue;
 238                                         }
 239                                         let (pubkey, peer_addr) =
 240                                                 match parse_peer_info(peer_pubkey_and_ip_addr.unwrap().to_string()) {
 241                                                         Ok(info) => info,
 242                                                         Err(e) => {
 243                                                                 println!("{:?}", e.into_inner().unwrap());
 244                                                                 continue;
 245                                                         }
 246                                                 };
 247                                         if connect_peer_if_necessary(pubkey, peer_addr, peer_manager.clone())
 248                                                 .await
 249                                                 .is_ok()
 250                                         {
 251                                                 println!("SUCCESS: connected to peer {}", pubkey);
 252                                         }
 253                                 }
 254                                 "disconnectpeer" => {
 255                                         let peer_pubkey = words.next();
 256                                         if peer_pubkey.is_none() {
 257                                                 println!("ERROR: disconnectpeer requires peer public key: `disconnectpeer <peer_pubkey>`");
 258                                                 continue;
 259                                         }
 260
 261                                         let peer_pubkey =
 262                                                 match bitcoin::secp256k1::PublicKey::from_str(peer_pubkey.unwrap()) {
 263                                                         Ok(pubkey) => pubkey,
 264                                                         Err(e) => {
 265                                                                 println!("ERROR: {}", e.to_string());
 266                                                                 continue;
 267                                                         }
 268                                                 };
 269
 270                                         if do_disconnect_peer(
 271                                                 peer_pubkey,
 272                                                 peer_manager.clone(),
 273                                                 channel_manager.clone(),
 274                                         )
 275                                         .is_ok()
 276                                         {
 277                                                 println!("SUCCESS: disconnected from peer {}", peer_pubkey);
 278                                         }
 279                                 }
 280                                 "listchannels" => list_channels(&channel_manager, &network_graph),
 281                                 "listpayments" => {
 282                                         list_payments(inbound_payments.clone(), outbound_payments.clone())
 283                                 }
 284                                 "closechannel" => {
 285                                         let channel_id_str = words.next();
 286                                         if channel_id_str.is_none() {
 287                                                 println!("ERROR: closechannel requires a channel ID: `closechannel <channel_id> <peer_pubkey>`");
 288                                                 continue;
 289                                         }
 290                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 291                                         if channel_id_vec.is_none() || channel_id_vec.as_ref().unwrap().len() != 32 {
 292                                                 println!("ERROR: couldn't parse channel_id");
 293                                                 continue;
 294                                         }
 295                                         let mut channel_id = [0; 32];
 296                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 297
 298                                         let peer_pubkey_str = words.next();
 299                                         if peer_pubkey_str.is_none() {
 300                                                 println!("ERROR: closechannel requires a peer pubkey: `closechannel <channel_id> <peer_pubkey>`");
 301                                                 continue;
 302                                         }
 303                                         let peer_pubkey_vec = match hex_utils::to_vec(peer_pubkey_str.unwrap()) {
 304                                                 Some(peer_pubkey_vec) => peer_pubkey_vec,
 305                                                 None => {
 306                                                         println!("ERROR: couldn't parse peer_pubkey");
 307                                                         continue;
 308                                                 }
 309                                         };
 310                                         let peer_pubkey = match PublicKey::from_slice(&peer_pubkey_vec) {
 311                                                 Ok(peer_pubkey) => peer_pubkey,
 312                                                 Err(_) => {
 313                                                         println!("ERROR: couldn't parse peer_pubkey");
 314                                                         continue;
 315                                                 }
 316                                         };
 317
 318                                         close_channel(channel_id, peer_pubkey, channel_manager.clone());
 319                                 }
 320                                 "forceclosechannel" => {
 321                                         let channel_id_str = words.next();
 322                                         if channel_id_str.is_none() {
 323                                                 println!("ERROR: forceclosechannel requires a channel ID: `forceclosechannel <channel_id> <peer_pubkey>`");
 324                                                 continue;
 325                                         }
 326                                         let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
 327                                         if channel_id_vec.is_none() || channel_id_vec.as_ref().unwrap().len() != 32 {
 328                                                 println!("ERROR: couldn't parse channel_id");
 329                                                 continue;
 330                                         }
 331                                         let mut channel_id = [0; 32];
 332                                         channel_id.copy_from_slice(&channel_id_vec.unwrap());
 333
 334                                         let peer_pubkey_str = words.next();
 335                                         if peer_pubkey_str.is_none() {
 336                                                 println!("ERROR: forceclosechannel requires a peer pubkey: `forceclosechannel <channel_id> <peer_pubkey>`");
 337                                                 continue;
 338                                         }
 339                                         let peer_pubkey_vec = match hex_utils::to_vec(peer_pubkey_str.unwrap()) {
 340                                                 Some(peer_pubkey_vec) => peer_pubkey_vec,
 341                                                 None => {
 342                                                         println!("ERROR: couldn't parse peer_pubkey");
 343                                                         continue;
 344                                                 }
 345                                         };
 346                                         let peer_pubkey = match PublicKey::from_slice(&peer_pubkey_vec) {
 347                                                 Ok(peer_pubkey) => peer_pubkey,
 348                                                 Err(_) => {
 349                                                         println!("ERROR: couldn't parse peer_pubkey");
 350                                                         continue;
 351                                                 }
 352                                         };
 353
 354                                         force_close_channel(channel_id, peer_pubkey, channel_manager.clone());
 355                                 }
 356                                 "nodeinfo" => node_info(&channel_manager, &peer_manager),
 357                                 "listpeers" => list_peers(peer_manager.clone()),
 358                                 "signmessage" => {
 359                                         const MSG_STARTPOS: usize = "signmessage".len() + 1;
 360                                         if line.as_bytes().len() <= MSG_STARTPOS {
 361                                                 println!("ERROR: signmsg requires a message");
 362                                                 continue;
 363                                         }
 364                                         println!(
 365                                                 "{:?}",
 366                                                 lightning::util::message_signing::sign(
 367                                                         &line.as_bytes()[MSG_STARTPOS..],
 368                                                         &keys_manager.get_node_secret_key()
 369                                                 )
 370                                         );
 371                                 }
 372                                 "sendonionmessage" => {
 373                                         let path_pks_str = words.next();
 374                                         if path_pks_str.is_none() {
 375                                                 println!(
 376                                                         "ERROR: sendonionmessage requires at least one node id for the path"
 377                                                 );
 378                                                 continue;
 379                                         }
 380                                         let mut node_pks = Vec::new();
 381                                         let mut errored = false;
 382                                         for pk_str in path_pks_str.unwrap().split(",") {
 383                                                 let node_pubkey_vec = match hex_utils::to_vec(pk_str) {
 384                                                         Some(peer_pubkey_vec) => peer_pubkey_vec,
 385                                                         None => {
 386                                                                 println!("ERROR: couldn't parse peer_pubkey");
 387                                                                 errored = true;
 388                                                                 break;
 389                                                         }
 390                                                 };
 391                                                 let node_pubkey = match PublicKey::from_slice(&node_pubkey_vec) {
 392                                                         Ok(peer_pubkey) => peer_pubkey,
 393                                                         Err(_) => {
 394                                                                 println!("ERROR: couldn't parse peer_pubkey");
 395                                                                 errored = true;
 396                                                                 break;
 397                                                         }
 398                                                 };
 399                                                 node_pks.push(node_pubkey);
 400                                         }
 401                                         if errored {
 402                                                 continue;
 403                                         }
 404                                         let tlv_type = match words.next().map(|ty_str| ty_str.parse()) {
 405                                                 Some(Ok(ty)) if ty >= 64 => ty,
 406                                                 _ => {
 407                                                         println!("Need an integral message type above 64");
 408                                                         continue;
 409                                                 }
 410                                         };
 411                                         let data = match words.next().map(|s| hex_utils::to_vec(s)) {
 412                                                 Some(Some(data)) => data,
 413                                                 _ => {
 414                                                         println!("Need a hex data string");
 415                                                         continue;
 416                                                 }
 417                                         };
 418                                         let destination_pk = node_pks.pop().unwrap();
 419                                         match onion_messenger.send_onion_message(
 420                                                 &node_pks,
 421                                                 Destination::Node(destination_pk),
 422                                                 OnionMessageContents::Custom(UserOnionMessageContents { tlv_type, data }),
 423                                                 None,
 424                                         ) {
 425                                                 Ok(()) => println!("SUCCESS: forwarded onion message to first hop"),
 426                                                 Err(e) => println!("ERROR: failed to send onion message: {:?}", e),
 427                                         }
 428                                 }
 429                                 "quit" | "exit" => break,
 430                                 _ => println!("Unknown command. See `\"help\" for available commands."),
 431                         }
 432                 }
 433         }
 434 }
 435
 436 fn help() {
 437         let package_version = env!("CARGO_PKG_VERSION");
 438         let package_name = env!("CARGO_PKG_NAME");
 439         println!("\nVERSION:");
 440         println!("  {} v{}", package_name, package_version);
 441         println!("\nUSAGE:");
 442         println!("  Command [arguments]");
 443         println!("\nCOMMANDS:");
 444         println!("  help\tShows a list of commands.");
 445         println!("  quit\tClose the application.");
 446         println!("\n  Channels:");
 447         println!("      openchannel pubkey@host:port <amt_satoshis> [--public]");
 448         println!("      closechannel <channel_id> <peer_pubkey>");
 449         println!("      forceclosechannel <channel_id> <peer_pubkey>");
 450         println!("      listchannels");
 451         println!("\n  Peers:");
 452         println!("      connectpeer pubkey@host:port");
 453         println!("      disconnectpeer <peer_pubkey>");
 454         println!("      listpeers");
 455         println!("\n  Payments:");
 456         println!("      sendpayment <invoice>");
 457         println!("      keysend <dest_pubkey> <amt_msats>");
 458         println!("      listpayments");
 459         println!("\n  Invoices:");
 460         println!("      getinvoice <amt_msats> <expiry_secs>");
 461         println!("\n  Other:");
 462         println!("      signmessage <message>");
 463         println!(
 464                 "      sendonionmessage <node_id_1,node_id_2,..,destination_node_id> <type> <hex_bytes>"
 465         );
 466         println!("      nodeinfo");
 467 }
 468
 469 fn node_info(channel_manager: &Arc<ChannelManager>, peer_manager: &Arc<PeerManager>) {
 470         println!("\t{{");
 471         println!("\t\t node_pubkey: {}", channel_manager.get_our_node_id());
 472         let chans = channel_manager.list_channels();
 473         println!("\t\t num_channels: {}", chans.len());
 474         println!("\t\t num_usable_channels: {}", chans.iter().filter(|c| c.is_usable).count());
 475         let local_balance_msat = chans.iter().map(|c| c.balance_msat).sum::<u64>();
 476         println!("\t\t local_balance_msat: {}", local_balance_msat);
 477         println!("\t\t num_peers: {}", peer_manager.get_peer_node_ids().len());
 478         println!("\t}},");
 479 }
 480
 481 fn list_peers(peer_manager: Arc<PeerManager>) {
 482         println!("\t{{");
 483         for (pubkey, _) in peer_manager.get_peer_node_ids() {
 484                 println!("\t\t pubkey: {}", pubkey);
 485         }
 486         println!("\t}},");
 487 }
 488
 489 fn list_channels(channel_manager: &Arc<ChannelManager>, network_graph: &Arc<NetworkGraph>) {
 490         print!("[");
 491         for chan_info in channel_manager.list_channels() {
 492                 println!("");
 493                 println!("\t{{");
 494                 println!("\t\tchannel_id: {},", hex_utils::hex_str(&chan_info.channel_id[..]));
 495                 if let Some(funding_txo) = chan_info.funding_txo {
 496                         println!("\t\tfunding_txid: {},", funding_txo.txid);
 497                 }
 498
 499                 println!(
 500                         "\t\tpeer_pubkey: {},",
 501                         hex_utils::hex_str(&chan_info.counterparty.node_id.serialize())
 502                 );
 503                 if let Some(node_info) = network_graph
 504                         .read_only()
 505                         .nodes()
 506                         .get(&NodeId::from_pubkey(&chan_info.counterparty.node_id))
 507                 {
 508                         if let Some(announcement) = &node_info.announcement_info {
 509                                 println!("\t\tpeer_alias: {}", announcement.alias);
 510                         }
 511                 }
 512
 513                 if let Some(id) = chan_info.short_channel_id {
 514                         println!("\t\tshort_channel_id: {},", id);
 515                 }
 516                 println!("\t\tis_channel_ready: {},", chan_info.is_channel_ready);
 517                 println!("\t\tchannel_value_satoshis: {},", chan_info.channel_value_satoshis);
 518                 println!("\t\tlocal_balance_msat: {},", chan_info.balance_msat);
 519                 if chan_info.is_usable {
 520                         println!("\t\tavailable_balance_for_send_msat: {},", chan_info.outbound_capacity_msat);
 521                         println!("\t\tavailable_balance_for_recv_msat: {},", chan_info.inbound_capacity_msat);
 522                 }
 523                 println!("\t\tchannel_can_send_payments: {},", chan_info.is_usable);
 524                 println!("\t\tpublic: {},", chan_info.is_public);
 525                 println!("\t}},");
 526         }
 527         println!("]");
 528 }
 529
 530 fn list_payments(inbound_payments: PaymentInfoStorage, outbound_payments: PaymentInfoStorage) {
 531         let inbound = inbound_payments.lock().unwrap();
 532         let outbound = outbound_payments.lock().unwrap();
 533         print!("[");
 534         for (payment_hash, payment_info) in inbound.deref() {
 535                 println!("");
 536                 println!("\t{{");
 537                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 538                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 539                 println!("\t\thtlc_direction: inbound,");
 540                 println!(
 541                         "\t\thtlc_status: {},",
 542                         match payment_info.status {
 543                                 HTLCStatus::Pending => "pending",
 544                                 HTLCStatus::Succeeded => "succeeded",
 545                                 HTLCStatus::Failed => "failed",
 546                         }
 547                 );
 548
 549                 println!("\t}},");
 550         }
 551
 552         for (payment_hash, payment_info) in outbound.deref() {
 553                 println!("");
 554                 println!("\t{{");
 555                 println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
 556                 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
 557                 println!("\t\thtlc_direction: outbound,");
 558                 println!(
 559                         "\t\thtlc_status: {},",
 560                         match payment_info.status {
 561                                 HTLCStatus::Pending => "pending",
 562                                 HTLCStatus::Succeeded => "succeeded",
 563                                 HTLCStatus::Failed => "failed",
 564                         }
 565                 );
 566
 567                 println!("\t}},");
 568         }
 569         println!("]");
 570 }
 571
 572 pub(crate) async fn connect_peer_if_necessary(
 573         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 574 ) -> Result<(), ()> {
 575         for (node_pubkey, _) in peer_manager.get_peer_node_ids() {
 576                 if node_pubkey == pubkey {
 577                         return Ok(());
 578                 }
 579         }
 580         let res = do_connect_peer(pubkey, peer_addr, peer_manager).await;
 581         if res.is_err() {
 582                 println!("ERROR: failed to connect to peer");
 583         }
 584         res
 585 }
 586
 587 pub(crate) async fn do_connect_peer(
 588         pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
 589 ) -> Result<(), ()> {
 590         match lightning_net_tokio::connect_outbound(Arc::clone(&peer_manager), pubkey, peer_addr).await
 591         {
 592                 Some(connection_closed_future) => {
 593                         let mut connection_closed_future = Box::pin(connection_closed_future);
 594                         loop {
 595                                 tokio::select! {
 596                                         _ = &mut connection_closed_future => return Err(()),
 597                                         _ = tokio::time::sleep(Duration::from_millis(10)) => {},
 598                                 };
 599                                 if peer_manager.get_peer_node_ids().iter().find(|(id, _)| *id == pubkey).is_some() {
 600                                         return Ok(());
 601                                 }
 602                         }
 603                 }
 604                 None => Err(()),
 605         }
 606 }
 607
 608 fn do_disconnect_peer(
 609         pubkey: bitcoin::secp256k1::PublicKey, peer_manager: Arc<PeerManager>,
 610         channel_manager: Arc<ChannelManager>,
 611 ) -> Result<(), ()> {
 612         //check for open channels with peer
 613         for channel in channel_manager.list_channels() {
 614                 if channel.counterparty.node_id == pubkey {
 615                         println!("Error: Node has an active channel with this peer, close any channels first");
 616                         return Err(());
 617                 }
 618         }
 619
 620         //check the pubkey matches a valid connected peer
 621         let peers = peer_manager.get_peer_node_ids();
 622         if !peers.iter().any(|(pk, _)| &pubkey == pk) {
 623                 println!("Error: Could not find peer {}", pubkey);
 624                 return Err(());
 625         }
 626
 627         peer_manager.disconnect_by_node_id(pubkey);
 628         Ok(())
 629 }
 630
 631 fn open_channel(
 632         peer_pubkey: PublicKey, channel_amt_sat: u64, announced_channel: bool,
 633         channel_manager: Arc<ChannelManager>,
 634 ) -> Result<(), ()> {
 635         let config = UserConfig {
 636                 channel_handshake_limits: ChannelHandshakeLimits {
 637                         // lnd's max to_self_delay is 2016, so we want to be compatible.
 638                         their_to_self_delay: 2016,
 639                         ..Default::default()
 640                 },
 641                 channel_handshake_config: ChannelHandshakeConfig {
 642                         announced_channel,
 643                         ..Default::default()
 644                 },
 645                 ..Default::default()
 646         };
 647
 648         match channel_manager.create_channel(peer_pubkey, channel_amt_sat, 0, 0, Some(config)) {
 649                 Ok(_) => {
 650                         println!("EVENT: initiated channel with peer {}. ", peer_pubkey);
 651                         return Ok(());
 652                 }
 653                 Err(e) => {
 654                         println!("ERROR: failed to open channel: {:?}", e);
 655                         return Err(());
 656                 }
 657         }
 658 }
 659
 660 fn send_payment(
 661         channel_manager: &ChannelManager, invoice: &Invoice, payment_storage: PaymentInfoStorage,
 662 ) {
 663         let status =
 664                 match pay_invoice(invoice, Retry::Timeout(Duration::from_secs(10)), channel_manager) {
 665                         Ok(_payment_id) => {
 666                                 let payee_pubkey = invoice.recover_payee_pub_key();
 667                                 let amt_msat = invoice.amount_milli_satoshis().unwrap();
 668                                 println!("EVENT: initiated sending {} msats to {}", amt_msat, payee_pubkey);
 669                                 print!("> ");
 670                                 HTLCStatus::Pending
 671                         }
 672                         Err(e) => {
 673                                 println!("ERROR: failed to send payment: {:?}", e);
 674                                 print!("> ");
 675                                 HTLCStatus::Failed
 676                         }
 677                 };
 678         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 679         let payment_secret = Some(invoice.payment_secret().clone());
 680
 681         let mut payments = payment_storage.lock().unwrap();
 682         payments.insert(
 683                 payment_hash,
 684                 PaymentInfo {
 685                         preimage: None,
 686                         secret: payment_secret,
 687                         status,
 688                         amt_msat: MillisatAmount(invoice.amount_milli_satoshis()),
 689                 },
 690         );
 691 }
 692
 693 fn keysend<E: EntropySource>(
 694         channel_manager: &ChannelManager, payee_pubkey: PublicKey, amt_msat: u64, entropy_source: &E,
 695         payment_storage: PaymentInfoStorage,
 696 ) {
 697         let payment_preimage = PaymentPreimage(entropy_source.get_secure_random_bytes());
 698         let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner());
 699
 700         let route_params = RouteParameters {
 701                 payment_params: PaymentParameters::for_keysend(payee_pubkey, 40),
 702                 final_value_msat: amt_msat,
 703         };
 704         let status = match channel_manager.send_spontaneous_payment_with_retry(
 705                 Some(payment_preimage),
 706                 PaymentId(payment_hash.0),
 707                 route_params,
 708                 Retry::Timeout(Duration::from_secs(10)),
 709         ) {
 710                 Ok(_payment_hash) => {
 711                         println!("EVENT: initiated sending {} msats to {}", amt_msat, payee_pubkey);
 712                         print!("> ");
 713                         HTLCStatus::Pending
 714                 }
 715                 Err(e) => {
 716                         println!("ERROR: failed to send payment: {:?}", e);
 717                         print!("> ");
 718                         HTLCStatus::Failed
 719                 }
 720         };
 721
 722         let mut payments = payment_storage.lock().unwrap();
 723         payments.insert(
 724                 payment_hash,
 725                 PaymentInfo {
 726                         preimage: None,
 727                         secret: None,
 728                         status,
 729                         amt_msat: MillisatAmount(Some(amt_msat)),
 730                 },
 731         );
 732 }
 733
 734 fn get_invoice(
 735         amt_msat: u64, payment_storage: PaymentInfoStorage, channel_manager: &ChannelManager,
 736         keys_manager: Arc<KeysManager>, network: Network, expiry_secs: u32,
 737         logger: Arc<disk::FilesystemLogger>,
 738 ) {
 739         let mut payments = payment_storage.lock().unwrap();
 740         let currency = match network {
 741                 Network::Bitcoin => Currency::Bitcoin,
 742                 Network::Testnet => Currency::BitcoinTestnet,
 743                 Network::Regtest => Currency::Regtest,
 744                 Network::Signet => Currency::Signet,
 745         };
 746         let invoice = match utils::create_invoice_from_channelmanager(
 747                 channel_manager,
 748                 keys_manager,
 749                 logger,
 750                 currency,
 751                 Some(amt_msat),
 752                 "ldk-tutorial-node".to_string(),
 753                 expiry_secs,
 754                 None,
 755         ) {
 756                 Ok(inv) => {
 757                         println!("SUCCESS: generated invoice: {}", inv);
 758                         inv
 759                 }
 760                 Err(e) => {
 761                         println!("ERROR: failed to create invoice: {:?}", e);
 762                         return;
 763                 }
 764         };
 765
 766         let payment_hash = PaymentHash(invoice.payment_hash().clone().into_inner());
 767         payments.insert(
 768                 payment_hash,
 769                 PaymentInfo {
 770                         preimage: None,
 771                         secret: Some(invoice.payment_secret().clone()),
 772                         status: HTLCStatus::Pending,
 773                         amt_msat: MillisatAmount(Some(amt_msat)),
 774                 },
 775         );
 776 }
 777
 778 fn close_channel(
 779         channel_id: [u8; 32], counterparty_node_id: PublicKey, channel_manager: Arc<ChannelManager>,
 780 ) {
 781         match channel_manager.close_channel(&channel_id, &counterparty_node_id) {
 782                 Ok(()) => println!("EVENT: initiating channel close"),
 783                 Err(e) => println!("ERROR: failed to close channel: {:?}", e),
 784         }
 785 }
 786
 787 fn force_close_channel(
 788         channel_id: [u8; 32], counterparty_node_id: PublicKey, channel_manager: Arc<ChannelManager>,
 789 ) {
 790         match channel_manager.force_close_broadcasting_latest_txn(&channel_id, &counterparty_node_id) {
 791                 Ok(()) => println!("EVENT: initiating channel force-close"),
 792                 Err(e) => println!("ERROR: failed to force-close channel: {:?}", e),
 793         }
 794 }
 795
 796 pub(crate) fn parse_peer_info(
 797         peer_pubkey_and_ip_addr: String,
 798 ) -> Result<(PublicKey, SocketAddr), std::io::Error> {
 799         let mut pubkey_and_addr = peer_pubkey_and_ip_addr.split("@");
 800         let pubkey = pubkey_and_addr.next();
 801         let peer_addr_str = pubkey_and_addr.next();
 802         if peer_addr_str.is_none() {
 803                 return Err(std::io::Error::new(
 804                         std::io::ErrorKind::Other,
 805                         "ERROR: incorrectly formatted peer info. Should be formatted as: `pubkey@host:port`",
 806                 ));
 807         }
 808
 809         let peer_addr = peer_addr_str.unwrap().to_socket_addrs().map(|mut r| r.next());
 810         if peer_addr.is_err() || peer_addr.as_ref().unwrap().is_none() {
 811                 return Err(std::io::Error::new(
 812                         std::io::ErrorKind::Other,
 813                         "ERROR: couldn't parse pubkey@host:port into a socket address",
 814                 ));
 815         }
 816
 817         let pubkey = hex_utils::to_compressed_pubkey(pubkey.unwrap());
 818         if pubkey.is_none() {
 819                 return Err(std::io::Error::new(
 820                         std::io::ErrorKind::Other,
 821                         "ERROR: unable to parse given pubkey for node",
 822                 ));
 823         }
 824
 825         Ok((pubkey.unwrap(), peer_addr.unwrap().unwrap()))
 826 }