+pub(crate) fn parse_startup_args() -> Result<LdkUserInfo, ()> {
+ if env::args().len() < 4 {
+ 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]`");
+ return Err(());
+ }
+ let bitcoind_rpc_info = env::args().skip(1).next().unwrap();
+ let bitcoind_rpc_info_parts: Vec<&str> = bitcoind_rpc_info.split("@").collect();
+ if bitcoind_rpc_info_parts.len() != 2 {
+ println!("ERROR: bad bitcoind RPC URL provided");
+ return Err(());
+ }
+ let rpc_user_and_password: Vec<&str> = bitcoind_rpc_info_parts[0].split(":").collect();
+ if rpc_user_and_password.len() != 2 {
+ println!("ERROR: bad bitcoind RPC username/password combo provided");
+ return Err(());
+ }
+ let bitcoind_rpc_username = rpc_user_and_password[0].to_string();
+ let bitcoind_rpc_password = rpc_user_and_password[1].to_string();
+ let bitcoind_rpc_path: Vec<&str> = bitcoind_rpc_info_parts[1].split(":").collect();
+ if bitcoind_rpc_path.len() != 2 {
+ println!("ERROR: bad bitcoind RPC path provided");
+ return Err(());
+ }
+ let bitcoind_rpc_host = bitcoind_rpc_path[0].to_string();
+ let bitcoind_rpc_port = bitcoind_rpc_path[1].parse::<u16>().unwrap();
+
+ let ldk_storage_dir_path = env::args().skip(2).next().unwrap();
+
+ let mut ldk_peer_port_set = true;
+ let ldk_peer_listening_port: u16 = match env::args().skip(3).next().map(|p| p.parse()) {
+ Some(Ok(p)) => p,
+ Some(Err(e)) => panic!(e),
+ None => {
+ ldk_peer_port_set = false;
+ 9735
+ }
+ };
+
+ let arg_idx = match ldk_peer_port_set {
+ true => 4,
+ false => 3,
+ };
+ let network: Network = match env::args().skip(arg_idx).next().as_ref().map(String::as_str) {
+ Some("testnet") => Network::Testnet,
+ Some("regtest") => Network::Regtest,
+ Some(_) => panic!("Unsupported network provided. Options are: `regtest`, `testnet`"),
+ None => Network::Testnet,
+ };
+ Ok(LdkUserInfo {
+ bitcoind_rpc_username,
+ bitcoind_rpc_password,
+ bitcoind_rpc_host,
+ bitcoind_rpc_port,
+ ldk_storage_dir_path,
+ ldk_peer_listening_port,
+ network,
+ })
+}
+
+pub(crate) async fn poll_for_user_input(
+ peer_manager: Arc<PeerManager>, channel_manager: Arc<ChannelManager>,
+ router: Arc<NetGraphMsgHandler<Arc<dyn chain::Access>, Arc<FilesystemLogger>>>,
+ payment_storage: PaymentInfoStorage, node_privkey: SecretKey, event_notifier: mpsc::Sender<()>,
+ ldk_data_dir: String, logger: Arc<FilesystemLogger>, network: Network,
+) {
+ println!("LDK startup successful. To view available commands: \"help\".\nLDK logs are available at <your-supplied-ldk-data-dir-path>/.ldk/logs");
+ let stdin = io::stdin();
+ print!("> ");
+ io::stdout().flush().unwrap(); // Without flushing, the `>` doesn't print
+ for line in stdin.lock().lines() {
+ let _ = event_notifier.try_send(());
+ let line = line.unwrap();
+ let mut words = line.split_whitespace();
+ if let Some(word) = words.next() {
+ match word {
+ "help" => help(),
+ "openchannel" => {
+ let peer_pubkey_and_ip_addr = words.next();
+ let channel_value_sat = words.next();
+ if peer_pubkey_and_ip_addr.is_none() || channel_value_sat.is_none() {
+ println!("ERROR: openchannel has 2 required arguments: `openchannel pubkey@host:port channel_amt_satoshis` [--public]");
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+ let peer_pubkey_and_ip_addr = peer_pubkey_and_ip_addr.unwrap();
+ let (pubkey, peer_addr) =
+ match parse_peer_info(peer_pubkey_and_ip_addr.to_string()) {
+ Ok(info) => info,
+ Err(e) => {
+ println!("{:?}", e.into_inner().unwrap());
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+ };
+
+ let chan_amt_sat: Result<u64, _> = channel_value_sat.unwrap().parse();
+ if chan_amt_sat.is_err() {
+ println!("ERROR: channel amount must be a number");
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+
+ if connect_peer_if_necessary(
+ pubkey,
+ peer_addr,
+ peer_manager.clone(),
+ event_notifier.clone(),
+ )
+ .is_err()
+ {
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ };
+
+ let announce_channel = match words.next() {
+ Some("--public") | Some("--public=true") => true,
+ Some("--public=false") => false,
+ Some(_) => {
+ println!("ERROR: invalid `--public` command format. Valid formats: `--public`, `--public=true` `--public=false`");
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+ None => false,
+ };
+
+ if open_channel(
+ pubkey,
+ chan_amt_sat.unwrap(),
+ announce_channel,
+ channel_manager.clone(),
+ )
+ .is_ok()
+ {
+ let peer_data_path = format!("{}/channel_peer_data", ldk_data_dir.clone());
+ let _ = disk::persist_channel_peer(
+ Path::new(&peer_data_path),
+ peer_pubkey_and_ip_addr,
+ );
+ }
+ }
+ "sendpayment" => {
+ let invoice_str = words.next();
+ if invoice_str.is_none() {
+ println!("ERROR: sendpayment requires an invoice: `sendpayment <invoice>`");
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+
+ let invoice_res = lightning_invoice::Invoice::from_str(invoice_str.unwrap());
+ if invoice_res.is_err() {
+ println!("ERROR: invalid invoice: {:?}", invoice_res.unwrap_err());
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+ let invoice = invoice_res.unwrap();
+ let route_hints: Vec<lightning_invoice::Route> =
+ invoice.routes().iter().map(|&route| route.clone()).collect();
+
+ let amt_pico_btc = invoice.amount_pico_btc();
+ if amt_pico_btc.is_none() {
+ println!("ERROR: invalid invoice: must contain amount to pay");
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+ let amt_msat = amt_pico_btc.unwrap() / 10;
+
+ let payee_pubkey = invoice.recover_payee_pub_key();
+ let final_cltv = *invoice.min_final_cltv_expiry().unwrap_or(&9) as u32;
+
+ let mut payment_hash = PaymentHash([0; 32]);
+ payment_hash.0.copy_from_slice(&invoice.payment_hash().as_ref()[0..32]);
+
+ let payment_secret = match invoice.payment_secret() {
+ Some(secret) => {
+ let mut payment_secret = PaymentSecret([0; 32]);
+ payment_secret.0.copy_from_slice(&secret.0);
+ Some(payment_secret)
+ }
+ None => None,
+ };
+
+ // rust-lightning-invoice doesn't currently support features, so we parse features
+ // manually from the invoice.
+ let mut invoice_features = InvoiceFeatures::empty();
+ for field in &invoice.into_signed_raw().raw_invoice().data.tagged_fields {
+ match field {
+ lightning_invoice::RawTaggedField::UnknownSemantics(vec) => {
+ if vec[0] == bech32::u5::try_from_u8(5).unwrap() {
+ if vec.len() >= 6 && vec[5].to_u8() & 0b10000 != 0 {
+ invoice_features =
+ invoice_features.set_variable_length_onion_optional();
+ }
+ if vec.len() >= 6 && vec[5].to_u8() & 0b01000 != 0 {
+ invoice_features =
+ invoice_features.set_variable_length_onion_required();
+ }
+ if vec.len() >= 4 && vec[3].to_u8() & 0b00001 != 0 {
+ invoice_features =
+ invoice_features.set_payment_secret_optional();
+ }
+ if vec.len() >= 5 && vec[4].to_u8() & 0b10000 != 0 {
+ invoice_features =
+ invoice_features.set_payment_secret_required();
+ }
+ if vec.len() >= 4 && vec[3].to_u8() & 0b00100 != 0 {
+ invoice_features =
+ invoice_features.set_basic_mpp_optional();
+ }
+ if vec.len() >= 4 && vec[3].to_u8() & 0b00010 != 0 {
+ invoice_features =
+ invoice_features.set_basic_mpp_required();
+ }
+ }
+ }
+ _ => {}
+ }
+ }
+ let invoice_features_opt = match invoice_features == InvoiceFeatures::empty() {
+ true => None,
+ false => Some(invoice_features),
+ };
+ send_payment(
+ payee_pubkey,
+ amt_msat,
+ final_cltv,
+ payment_hash,
+ payment_secret,
+ invoice_features_opt,
+ route_hints,
+ router.clone(),
+ channel_manager.clone(),
+ payment_storage.clone(),
+ logger.clone(),
+ );
+ }
+ "getinvoice" => {
+ let amt_str = words.next();
+ if amt_str.is_none() {
+ println!("ERROR: getinvoice requires an amount in millisatoshis");
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+
+ let amt_msat: Result<u64, _> = amt_str.unwrap().parse();
+ if amt_msat.is_err() {
+ println!("ERROR: getinvoice provided payment amount was not a number");
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+ get_invoice(
+ amt_msat.unwrap(),
+ payment_storage.clone(),
+ node_privkey.clone(),
+ channel_manager.clone(),
+ network,
+ );
+ }
+ "connectpeer" => {
+ let peer_pubkey_and_ip_addr = words.next();
+ if peer_pubkey_and_ip_addr.is_none() {
+ println!("ERROR: connectpeer requires peer connection info: `connectpeer pubkey@host:port`");
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+ let (pubkey, peer_addr) =
+ match parse_peer_info(peer_pubkey_and_ip_addr.unwrap().to_string()) {
+ Ok(info) => info,
+ Err(e) => {
+ println!("{:?}", e.into_inner().unwrap());
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+ };
+ if connect_peer_if_necessary(
+ pubkey,
+ peer_addr,
+ peer_manager.clone(),
+ event_notifier.clone(),
+ )
+ .is_ok()
+ {
+ println!("SUCCESS: connected to peer {}", pubkey);
+ }
+ }
+ "listchannels" => list_channels(channel_manager.clone()),
+ "listpayments" => list_payments(payment_storage.clone()),
+ "closechannel" => {
+ let channel_id_str = words.next();
+ if channel_id_str.is_none() {
+ println!("ERROR: closechannel requires a channel ID: `closechannel <channel_id>`");
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+ let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
+ if channel_id_vec.is_none() {
+ println!("ERROR: couldn't parse channel_id as hex");
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+ let mut channel_id = [0; 32];
+ channel_id.copy_from_slice(&channel_id_vec.unwrap());
+ close_channel(channel_id, channel_manager.clone());
+ }
+ "forceclosechannel" => {
+ let channel_id_str = words.next();
+ if channel_id_str.is_none() {
+ println!("ERROR: forceclosechannel requires a channel ID: `forceclosechannel <channel_id>`");
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+ let channel_id_vec = hex_utils::to_vec(channel_id_str.unwrap());
+ if channel_id_vec.is_none() {
+ println!("ERROR: couldn't parse channel_id as hex");
+ print!("> ");
+ io::stdout().flush().unwrap();
+ continue;
+ }
+ let mut channel_id = [0; 32];
+ channel_id.copy_from_slice(&channel_id_vec.unwrap());
+ force_close_channel(channel_id, channel_manager.clone());
+ }
+ _ => println!("Unknown command. See `\"help\" for available commands."),
+ }
+ }
+ print!("> ");
+ io::stdout().flush().unwrap();
+ }
+}
+
+fn help() {
+ println!("openchannel pubkey@host:port <channel_amt_satoshis>");
+ println!("sendpayment <invoice>");
+ println!("getinvoice <amt_in_millisatoshis>");
+ println!("connectpeer pubkey@host:port");
+ println!("listchannels");
+ println!("listpayments");
+ println!("closechannel <channel_id>");
+ println!("forceclosechannel <channel_id>");
+}
+
+fn list_channels(channel_manager: Arc<ChannelManager>) {
+ print!("[");
+ for chan_info in channel_manager.list_channels() {
+ println!("");
+ println!("\t{{");
+ println!("\t\tchannel_id: {},", hex_utils::hex_str(&chan_info.channel_id[..]));
+ println!(
+ "\t\tpeer_pubkey: {},",
+ hex_utils::hex_str(&chan_info.remote_network_id.serialize())
+ );
+ let mut pending_channel = false;
+ match chan_info.short_channel_id {
+ Some(id) => println!("\t\tshort_channel_id: {},", id),
+ None => {
+ pending_channel = true;
+ }
+ }
+ println!("\t\tpending_open: {},", pending_channel);
+ println!("\t\tchannel_value_satoshis: {},", chan_info.channel_value_satoshis);
+ println!("\t\tchannel_can_send_payments: {},", chan_info.is_live);
+ println!("\t}},");
+ }
+ println!("]");
+}
+
+fn list_payments(payment_storage: PaymentInfoStorage) {
+ let payments = payment_storage.lock().unwrap();
+ print!("[");
+ for (payment_hash, payment_info) in payments.deref() {
+ let direction_str = match payment_info.direction {
+ HTLCDirection::Inbound => "inbound",
+ HTLCDirection::Outbound => "outbound",
+ };
+ println!("");
+ println!("\t{{");
+ println!("\t\tamount_millisatoshis: {},", payment_info.amt_msat);
+ println!("\t\tpayment_hash: {},", hex_utils::hex_str(&payment_hash.0));
+ println!("\t\thtlc_direction: {},", direction_str);
+ println!(
+ "\t\thtlc_status: {},",
+ match payment_info.status {
+ HTLCStatus::Pending => "pending",
+ HTLCStatus::Succeeded => "succeeded",
+ HTLCStatus::Failed => "failed",
+ }
+ );
+
+ println!("\t}},");
+ }
+ println!("]");