4 ChannelManager, FilesystemLogger, HTLCDirection, HTLCStatus, PaymentInfoStorage, PeerManager,
7 use bitcoin::hashes::sha256::Hash as Sha256Hash;
8 use bitcoin::hashes::Hash;
9 use bitcoin::network::constants::Network;
10 use bitcoin::secp256k1::key::{PublicKey, SecretKey};
11 use bitcoin::secp256k1::Secp256k1;
13 use lightning::ln::channelmanager::{PaymentHash, PaymentPreimage, PaymentSecret};
14 use lightning::ln::features::InvoiceFeatures;
15 use lightning::routing::network_graph::{NetGraphMsgHandler, RoutingFees};
16 use lightning::routing::router;
17 use lightning::routing::router::RouteHint;
18 use lightning::util::config::UserConfig;
23 use std::io::{BufRead, Write};
24 use std::net::{SocketAddr, TcpStream};
27 use std::str::FromStr;
29 use std::time::Duration;
30 use tokio::sync::mpsc;
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) network: Network,
42 pub(crate) fn parse_startup_args() -> Result<LdkUserInfo, ()> {
43 if env::args().len() < 4 {
44 println!("ldk-tutorial-node requires 3 arguments: `cargo run <bitcoind-rpc-username>:<bitcoind-rpc-password>@<bitcoind-rpc-host>:<bitcoind-rpc-port> ldk_storage_directory_path [<ldk-incoming-peer-listening-port>] [bitcoin-network]`");
47 let bitcoind_rpc_info = env::args().skip(1).next().unwrap();
48 let bitcoind_rpc_info_parts: Vec<&str> = bitcoind_rpc_info.split("@").collect();
49 if bitcoind_rpc_info_parts.len() != 2 {
50 println!("ERROR: bad bitcoind RPC URL provided");
53 let rpc_user_and_password: Vec<&str> = bitcoind_rpc_info_parts[0].split(":").collect();
54 if rpc_user_and_password.len() != 2 {
55 println!("ERROR: bad bitcoind RPC username/password combo provided");
58 let bitcoind_rpc_username = rpc_user_and_password[0].to_string();
59 let bitcoind_rpc_password = rpc_user_and_password[1].to_string();
60 let bitcoind_rpc_path: Vec<&str> = bitcoind_rpc_info_parts[1].split(":").collect();
61 if bitcoind_rpc_path.len() != 2 {
62 println!("ERROR: bad bitcoind RPC path provided");
65 let bitcoind_rpc_host = bitcoind_rpc_path[0].to_string();
66 let bitcoind_rpc_port = bitcoind_rpc_path[1].parse::<u16>().unwrap();
68 let ldk_storage_dir_path = env::args().skip(2).next().unwrap();
70 let mut ldk_peer_port_set = true;
71 let ldk_peer_listening_port: u16 = match env::args().skip(3).next().map(|p| p.parse()) {
73 Some(Err(e)) => panic!(e),
75 ldk_peer_port_set = false;
80 let arg_idx = match ldk_peer_port_set {
84 let network: Network = match env::args().skip(arg_idx).next().as_ref().map(String::as_str) {
85 Some("testnet") => Network::Testnet,
86 Some("regtest") => Network::Regtest,
87 Some(_) => panic!("Unsupported network provided. Options are: `regtest`, `testnet`"),
88 None => Network::Testnet,
91 bitcoind_rpc_username,
92 bitcoind_rpc_password,
96 ldk_peer_listening_port,
101 pub(crate) async fn poll_for_user_input(
102 peer_manager: Arc<PeerManager>, channel_manager: Arc<ChannelManager>,
103 router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access>, Arc<FilesystemLogger>>>,
104 payment_storage: PaymentInfoStorage, node_privkey: SecretKey, event_notifier: mpsc::Sender<()>,
105 ldk_data_dir: String, logger: Arc<FilesystemLogger>, network: Network,
107 println!("LDK startup successful. To view available commands: \"help\".\nLDK logs are available at <your-supplied-ldk-data-dir-path>/.ldk/logs");
108 let stdin = io::stdin();
110 io::stdout().flush().unwrap(); // Without flushing, the `>` doesn't print
111 for line in stdin.lock().lines() {
112 let _ = event_notifier.try_send(());
113 let line = line.unwrap();
114 let mut words = line.split_whitespace();
115 if let Some(word) = words.next() {
119 let peer_pubkey_and_ip_addr = words.next();
120 let channel_value_sat = words.next();
121 if peer_pubkey_and_ip_addr.is_none() || channel_value_sat.is_none() {
122 println!("ERROR: openchannel has 2 required arguments: `openchannel pubkey@host:port channel_amt_satoshis` [--public]");
124 io::stdout().flush().unwrap();
127 let peer_pubkey_and_ip_addr = peer_pubkey_and_ip_addr.unwrap();
128 let (pubkey, peer_addr) =
129 match parse_peer_info(peer_pubkey_and_ip_addr.to_string()) {
132 println!("{:?}", e.into_inner().unwrap());
134 io::stdout().flush().unwrap();
139 let chan_amt_sat: Result<u64, _> = channel_value_sat.unwrap().parse();
140 if chan_amt_sat.is_err() {
141 println!("ERROR: channel amount must be a number");
143 io::stdout().flush().unwrap();
147 if connect_peer_if_necessary(
150 peer_manager.clone(),
151 event_notifier.clone(),
156 io::stdout().flush().unwrap();
160 let announce_channel = match words.next() {
161 Some("--public") | Some("--public=true") => true,
162 Some("--public=false") => false,
164 println!("ERROR: invalid `--public` command format. Valid formats: `--public`, `--public=true` `--public=false`");
166 io::stdout().flush().unwrap();
174 chan_amt_sat.unwrap(),
176 channel_manager.clone(),
180 let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
181 let _ = disk::persist_channel_peer(
182 Path::new(&peer_data_path),
183 peer_pubkey_and_ip_addr,
188 let invoice_str = words.next();
189 if invoice_str.is_none() {
190 println!("ERROR: sendpayment requires an invoice: `sendpayment <invoice>`");
192 io::stdout().flush().unwrap();
196 let invoice_res = lightning_invoice::Invoice::from_str(invoice_str.unwrap());
197 if invoice_res.is_err() {
198 println!("ERROR: invalid invoice: {:?}", invoice_res.unwrap_err());
200 io::stdout().flush().unwrap();
203 let invoice = invoice_res.unwrap();
204 let route_hints: Vec<lightning_invoice::Route> =
205 invoice.routes().iter().map(|&route| route.clone()).collect();
207 let amt_pico_btc = invoice.amount_pico_btc();
208 if amt_pico_btc.is_none() {
209 println!("ERROR: invalid invoice: must contain amount to pay");
211 io::stdout().flush().unwrap();
214 let amt_msat = amt_pico_btc.unwrap() / 10;
216 let payee_pubkey = invoice.recover_payee_pub_key();
217 let final_cltv = *invoice.min_final_cltv_expiry().unwrap_or(&9) as u32;
219 let mut payment_hash = PaymentHash([0; 32]);
220 payment_hash.0.copy_from_slice(&invoice.payment_hash().as_ref()[0..32]);
222 let payment_secret = match invoice.payment_secret() {
224 let mut payment_secret = PaymentSecret([0; 32]);
225 payment_secret.0.copy_from_slice(&secret.0);
231 // rust-lightning-invoice doesn't currently support features, so we parse features
232 // manually from the invoice.
233 let mut invoice_features = InvoiceFeatures::empty();
234 for field in &invoice.into_signed_raw().raw_invoice().data.tagged_fields {
236 lightning_invoice::RawTaggedField::UnknownSemantics(vec) => {
237 if vec[0] == bech32::u5::try_from_u8(5).unwrap() {
238 if vec.len() >= 6 && vec[5].to_u8() & 0b10000 != 0 {
240 invoice_features.set_variable_length_onion_optional();
242 if vec.len() >= 6 && vec[5].to_u8() & 0b01000 != 0 {
244 invoice_features.set_variable_length_onion_required();
246 if vec.len() >= 4 && vec[3].to_u8() & 0b00001 != 0 {
248 invoice_features.set_payment_secret_optional();
250 if vec.len() >= 5 && vec[4].to_u8() & 0b10000 != 0 {
252 invoice_features.set_payment_secret_required();
254 if vec.len() >= 4 && vec[3].to_u8() & 0b00100 != 0 {
256 invoice_features.set_basic_mpp_optional();
258 if vec.len() >= 4 && vec[3].to_u8() & 0b00010 != 0 {
260 invoice_features.set_basic_mpp_required();
267 let invoice_features_opt = match invoice_features == InvoiceFeatures::empty() {
269 false => Some(invoice_features),
277 invoice_features_opt,
280 channel_manager.clone(),
281 payment_storage.clone(),
286 let amt_str = words.next();
287 if amt_str.is_none() {
288 println!("ERROR: getinvoice requires an amount in satoshis");
290 io::stdout().flush().unwrap();
294 let amt_sat: Result<u64, _> = amt_str.unwrap().parse();
295 if amt_sat.is_err() {
296 println!("ERROR: getinvoice provided payment amount was not a number");
298 io::stdout().flush().unwrap();
303 payment_storage.clone(),
304 node_privkey.clone(),
305 channel_manager.clone(),
310 let peer_pubkey_and_ip_addr = words.next();
311 if peer_pubkey_and_ip_addr.is_none() {
312 println!("ERROR: connectpeer requires peer connection info: `connectpeer pubkey@host:port`");
314 io::stdout().flush().unwrap();
317 let (pubkey, peer_addr) =
318 match parse_peer_info(peer_pubkey_and_ip_addr.unwrap().to_string()) {
321 println!("{:?}", e.into_inner().unwrap());
323 io::stdout().flush().unwrap();
327 if connect_peer_if_necessary(
330 peer_manager.clone(),
331 event_notifier.clone(),
335 println!("SUCCESS: connected to peer {}", pubkey);
338 "listchannels" => list_channels(channel_manager.clone()),
339 "listpayments" => list_payments(payment_storage.clone()),
341 let channel_id_str = words.next();
342 if channel_id_str.is_none() {
343 println!("ERROR: closechannel requires a channel ID: `closechannel <channel_id>`");
345 io::stdout().flush().unwrap();
348 let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
349 if channel_id_vec.is_none() {
350 println!("ERROR: couldn't parse channel_id as hex");
352 io::stdout().flush().unwrap();
355 let mut channel_id = [0; 32];
356 channel_id.copy_from_slice(&channel_id_vec.unwrap());
357 close_channel(channel_id, channel_manager.clone());
359 "forceclosechannel" => {
360 let channel_id_str = words.next();
361 if channel_id_str.is_none() {
362 println!("ERROR: forceclosechannel requires a channel ID: `forceclosechannel <channel_id>`");
364 io::stdout().flush().unwrap();
367 let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
368 if channel_id_vec.is_none() {
369 println!("ERROR: couldn't parse channel_id as hex");
371 io::stdout().flush().unwrap();
374 let mut channel_id = [0; 32];
375 channel_id.copy_from_slice(&channel_id_vec.unwrap());
376 force_close_channel(channel_id, channel_manager.clone());
378 _ => println!("Unknown command. See `\"help\" for available commands."),
382 io::stdout().flush().unwrap();
387 println!("openchannel pubkey@host:port <channel_amt_satoshis>");
388 println!("sendpayment <invoice>");
389 println!("getinvoice <amt_in_satoshis>");
390 println!("connectpeer pubkey@host:port");
391 println!("listchannels");
392 println!("listpayments");
393 println!("closechannel <channel_id>");
394 println!("forceclosechannel <channel_id>");
397 fn list_channels(channel_manager: Arc<ChannelManager>) {
399 for chan_info in channel_manager.list_channels() {
402 println!("\t\tchannel_id: {},", hex_utils::hex_str(&chan_info.channel_id[..]));
404 "\t\tpeer_pubkey: {},",
405 hex_utils::hex_str(&chan_info.remote_network_id.serialize())
407 let mut pending_channel = false;
408 match chan_info.short_channel_id {
409 Some(id) => println!("\t\tshort_channel_id: {},", id),
411 pending_channel = true;
414 println!("\t\tpending_open: {},", pending_channel);
415 println!("\t\tchannel_value_satoshis: {},", chan_info.channel_value_satoshis);
416 println!("\t\tchannel_can_send_payments: {},", chan_info.is_live);
422 fn list_payments(payment_storage: PaymentInfoStorage) {
423 let payments = payment_storage.lock().unwrap();
425 for (payment_hash, payment_info) in payments.deref() {
426 let direction_str = match payment_info.1 {
427 HTLCDirection::Inbound => "inbound",
428 HTLCDirection::Outbound => "outbound",
432 println!("\t\tamount_satoshis: {},", payment_info.3);
433 println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
434 println!("\t\thtlc_direction: {},", direction_str);
436 "\t\thtlc_status: {},",
437 match payment_info.2 {
438 HTLCStatus::Pending => "pending",
439 HTLCStatus::Succeeded => "succeeded",
440 HTLCStatus::Failed => "failed",
449 pub(crate) fn connect_peer_if_necessary(
450 pubkey: PublicKey, peer_addr: SocketAddr, peer_manager: Arc<PeerManager>,
451 event_notifier: mpsc::Sender<()>,
452 ) -> Result<(), ()> {
453 for node_pubkey in peer_manager.get_peer_node_ids() {
454 if node_pubkey == pubkey {
458 match TcpStream::connect_timeout(&peer_addr, Duration::from_secs(10)) {
460 let peer_mgr = peer_manager.clone();
461 let event_ntfns = event_notifier.clone();
462 tokio::spawn(async move {
463 lightning_net_tokio::setup_outbound(peer_mgr, event_ntfns, pubkey, stream).await;
465 let mut peer_connected = false;
466 while !peer_connected {
467 for node_pubkey in peer_manager.get_peer_node_ids() {
468 if node_pubkey == pubkey {
469 peer_connected = true;
475 println!("ERROR: failed to connect to peer: {:?}", e);
483 peer_pubkey: PublicKey, channel_amt_sat: u64, announce_channel: bool,
484 channel_manager: Arc<ChannelManager>,
485 ) -> Result<(), ()> {
486 let mut config = UserConfig::default();
487 if announce_channel {
488 config.channel_options.announced_channel = true;
490 // lnd's max to_self_delay is 2016, so we want to be compatible.
491 config.peer_channel_config_limits.their_to_self_delay = 2016;
492 match channel_manager.create_channel(peer_pubkey, channel_amt_sat, 0, 0, None) {
494 println!("EVENT: initiated channel with peer {}. ", peer_pubkey);
498 println!("ERROR: failed to open channel: {:?}", e);
505 payee: PublicKey, amt_msat: u64, final_cltv: u32, payment_hash: PaymentHash,
506 payment_secret: Option<PaymentSecret>, payee_features: Option<InvoiceFeatures>,
507 mut route_hints: Vec<lightning_invoice::Route>,
508 router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access>, Arc<FilesystemLogger>>>,
509 channel_manager: Arc<ChannelManager>, payment_storage: PaymentInfoStorage,
510 logger: Arc<FilesystemLogger>,
512 let network_graph = router.network_graph.read().unwrap();
513 let first_hops = channel_manager.list_usable_channels();
514 let payer_pubkey = channel_manager.get_our_node_id();
516 let mut hints: Vec<RouteHint> = Vec::new();
517 for route in route_hints.drain(..) {
518 let route_hops = route.into_inner();
519 let last_hop = &route_hops[route_hops.len() - 1];
520 hints.push(RouteHint {
521 src_node_id: last_hop.pubkey,
522 short_channel_id: u64::from_be_bytes(last_hop.short_channel_id),
524 base_msat: last_hop.fee_base_msat,
525 proportional_millionths: last_hop.fee_proportional_millionths,
527 cltv_expiry_delta: last_hop.cltv_expiry_delta,
528 htlc_minimum_msat: None,
529 htlc_maximum_msat: None,
532 let route = router::get_route(
537 Some(&first_hops.iter().collect::<Vec<_>>()),
538 &hints.iter().collect::<Vec<_>>(),
543 if let Err(e) = route {
544 println!("ERROR: failed to find route: {}", e.err);
547 let status = match channel_manager.send_payment(&route.unwrap(), payment_hash, &payment_secret)
550 println!("EVENT: initiated sending {} msats to {}", amt_msat, payee);
554 println!("ERROR: failed to send payment: {:?}", e);
558 let mut payments = payment_storage.lock().unwrap();
561 (None, HTLCDirection::Outbound, status, SatoshiAmount(Some(amt_msat / 1000))),
566 amt_sat: u64, payment_storage: PaymentInfoStorage, our_node_privkey: SecretKey,
567 channel_manager: Arc<ChannelManager>, network: Network,
569 let mut payments = payment_storage.lock().unwrap();
570 let secp_ctx = Secp256k1::new();
572 let mut preimage = [0; 32];
573 rand::thread_rng().fill_bytes(&mut preimage);
574 let payment_hash = Sha256Hash::hash(&preimage);
576 let our_node_pubkey = channel_manager.get_our_node_id();
577 let mut invoice = lightning_invoice::InvoiceBuilder::new(match network {
578 Network::Bitcoin => lightning_invoice::Currency::Bitcoin,
579 Network::Testnet => lightning_invoice::Currency::BitcoinTestnet,
580 Network::Regtest => lightning_invoice::Currency::Regtest,
581 Network::Signet => panic!("Signet invoices not supported"),
583 .payment_hash(payment_hash)
584 .description("rust-lightning-bitcoinrpc invoice".to_string())
585 .amount_pico_btc(amt_sat * 10_000)
587 .payee_pub_key(our_node_pubkey);
589 // Add route hints to the invoice.
590 let our_channels = channel_manager.list_usable_channels();
591 let mut min_final_cltv_expiry = 9;
592 for channel in our_channels {
593 let short_channel_id = match channel.short_channel_id {
594 Some(id) => id.to_be_bytes(),
597 let forwarding_info = match channel.counterparty_forwarding_info {
601 if forwarding_info.cltv_expiry_delta > min_final_cltv_expiry {
602 min_final_cltv_expiry = forwarding_info.cltv_expiry_delta;
604 invoice = invoice.route(vec![lightning_invoice::RouteHop {
605 pubkey: channel.remote_network_id,
607 fee_base_msat: forwarding_info.fee_base_msat,
608 fee_proportional_millionths: forwarding_info.fee_proportional_millionths,
609 cltv_expiry_delta: forwarding_info.cltv_expiry_delta,
612 invoice = invoice.min_final_cltv_expiry(min_final_cltv_expiry.into());
616 invoice.build_signed(|msg_hash| secp_ctx.sign_recoverable(msg_hash, &our_node_privkey));
619 Ok(invoice) => println!("SUCCESS: generated invoice: {}", invoice),
620 Err(e) => println!("ERROR: failed to create invoice: {:?}", e),
624 PaymentHash(payment_hash.into_inner()),
626 Some(PaymentPreimage(preimage)),
627 HTLCDirection::Inbound,
629 SatoshiAmount(Some(amt_sat)),
634 fn close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
635 match channel_manager.close_channel(&channel_id) {
636 Ok(()) => println!("EVENT: initiating channel close"),
637 Err(e) => println!("ERROR: failed to close channel: {:?}", e),
641 fn force_close_channel(channel_id: [u8; 32], channel_manager: Arc<ChannelManager>) {
642 match channel_manager.force_close_channel(&channel_id) {
643 Ok(()) => println!("EVENT: initiating channel force-close"),
644 Err(e) => println!("ERROR: failed to force-close channel: {:?}", e),
648 pub(crate) fn parse_peer_info(
649 peer_pubkey_and_ip_addr: String,
650 ) -> Result<(PublicKey, SocketAddr), std::io::Error> {
651 let mut pubkey_and_addr = peer_pubkey_and_ip_addr.split("@");
652 let pubkey = pubkey_and_addr.next();
653 let peer_addr_str = pubkey_and_addr.next();
654 if peer_addr_str.is_none() || peer_addr_str.is_none() {
655 return Err(std::io::Error::new(
656 std::io::ErrorKind::Other,
657 "ERROR: incorrectly formatted peer
658 info. Should be formatted as: `pubkey@host:port`",
662 let peer_addr: Result<SocketAddr, _> = peer_addr_str.unwrap().parse();
663 if peer_addr.is_err() {
664 return Err(std::io::Error::new(
665 std::io::ErrorKind::Other,
666 "ERROR: couldn't parse pubkey@host:port into a socket address",
670 let pubkey = hex_utils::to_compressed_pubkey(pubkey.unwrap());
671 if pubkey.is_none() {
672 return Err(std::io::Error::new(
673 std::io::ErrorKind::Other,
674 "ERROR: unable to parse given pubkey for node",
678 Ok((pubkey.unwrap(), peer_addr.unwrap()))