1 //! Convenient utilities to create an invoice.
3 use {CreationError, Currency, DEFAULT_EXPIRY_TIME, Invoice, InvoiceBuilder, SignOrCreationError, RawInvoice};
4 use payment::{Payer, Router};
7 use bitcoin_hashes::Hash;
10 use lightning::chain::chaininterface::{BroadcasterInterface, FeeEstimator};
11 use lightning::chain::keysinterface::{Sign, KeysInterface};
12 use lightning::ln::{PaymentHash, PaymentPreimage, PaymentSecret};
13 use lightning::ln::channelmanager::{ChannelDetails, ChannelManager, PaymentId, PaymentSendFailure, MIN_FINAL_CLTV_EXPIRY};
14 use lightning::ln::msgs::LightningError;
15 use lightning::routing::scoring::Score;
16 use lightning::routing::network_graph::{NetworkGraph, RoutingFees};
17 use lightning::routing::router::{Route, RouteHint, RouteHintHop, RouteParameters, find_route};
18 use lightning::util::logger::Logger;
19 use secp256k1::key::PublicKey;
20 use core::convert::TryInto;
22 use core::time::Duration;
24 #[cfg(feature = "std")]
25 /// Utility to construct an invoice. Generally, unless you want to do something like a custom
26 /// cltv_expiry, this is what you should be using to create an invoice. The reason being, this
27 /// method stores the invoice's payment secret and preimage in `ChannelManager`, so (a) the user
28 /// doesn't have to store preimage/payment secret information and (b) `ChannelManager` can verify
29 /// that the payment secret is valid when the invoice is paid.
30 pub fn create_invoice_from_channelmanager<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref>(
31 channelmanager: &ChannelManager<Signer, M, T, K, F, L>, keys_manager: K, network: Currency,
32 amt_msat: Option<u64>, description: String
33 ) -> Result<Invoice, SignOrCreationError<()>>
35 M::Target: chain::Watch<Signer>,
36 T::Target: BroadcasterInterface,
37 K::Target: KeysInterface<Signer = Signer>,
38 F::Target: FeeEstimator,
41 use std::time::SystemTime;
42 let duration = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH)
43 .expect("for the foreseeable future this shouldn't happen");
44 create_invoice_from_channelmanager_and_duration_since_epoch(
54 /// See [`create_invoice_from_channelmanager`]
55 /// This version can be used in a `no_std` environment, where [`std::time::SystemTime`] is not
56 /// available and the current time is supplied by the caller.
57 pub fn create_invoice_from_channelmanager_and_duration_since_epoch<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref>(
58 channelmanager: &ChannelManager<Signer, M, T, K, F, L>, keys_manager: K, network: Currency,
59 amt_msat: Option<u64>, description: String, duration_since_epoch: Duration,
60 ) -> Result<Invoice, SignOrCreationError<()>>
62 M::Target: chain::Watch<Signer>,
63 T::Target: BroadcasterInterface,
64 K::Target: KeysInterface<Signer = Signer>,
65 F::Target: FeeEstimator,
68 // Marshall route hints.
69 let our_channels = channelmanager.list_usable_channels();
70 let mut route_hints = vec![];
71 for channel in our_channels {
72 let short_channel_id = match channel.short_channel_id {
76 let forwarding_info = match channel.counterparty.forwarding_info {
80 route_hints.push(RouteHint(vec![RouteHintHop {
81 src_node_id: channel.counterparty.node_id,
84 base_msat: forwarding_info.fee_base_msat,
85 proportional_millionths: forwarding_info.fee_proportional_millionths,
87 cltv_expiry_delta: forwarding_info.cltv_expiry_delta,
88 htlc_minimum_msat: None,
89 htlc_maximum_msat: None,
93 // `create_inbound_payment` only returns an error if the amount is greater than the total bitcoin
95 let (payment_hash, payment_secret) = channelmanager.create_inbound_payment(
96 amt_msat, DEFAULT_EXPIRY_TIME.try_into().unwrap())
97 .map_err(|()| SignOrCreationError::CreationError(CreationError::InvalidAmount))?;
98 let our_node_pubkey = channelmanager.get_our_node_id();
99 let mut invoice = InvoiceBuilder::new(network)
100 .description(description)
101 .duration_since_epoch(duration_since_epoch)
102 .payee_pub_key(our_node_pubkey)
103 .payment_hash(Hash::from_slice(&payment_hash.0).unwrap())
104 .payment_secret(payment_secret)
106 .min_final_cltv_expiry(MIN_FINAL_CLTV_EXPIRY.into());
107 if let Some(amt) = amt_msat {
108 invoice = invoice.amount_milli_satoshis(amt);
110 for hint in route_hints {
111 invoice = invoice.private_route(hint);
114 let raw_invoice = match invoice.build_raw() {
116 Err(e) => return Err(SignOrCreationError::CreationError(e))
118 let hrp_str = raw_invoice.hrp.to_string();
119 let hrp_bytes = hrp_str.as_bytes();
120 let data_without_signature = raw_invoice.data.to_base32();
121 let invoice_preimage = RawInvoice::construct_invoice_preimage(hrp_bytes, &data_without_signature);
122 let signed_raw_invoice = raw_invoice.sign(|_| keys_manager.sign_invoice(invoice_preimage));
123 match signed_raw_invoice {
124 Ok(inv) => Ok(Invoice::from_signed(inv).unwrap()),
125 Err(e) => Err(SignOrCreationError::SignError(e))
129 /// A [`Router`] implemented using [`find_route`].
130 pub struct DefaultRouter<G: Deref<Target = NetworkGraph>, L: Deref> where L::Target: Logger {
135 impl<G: Deref<Target = NetworkGraph>, L: Deref> DefaultRouter<G, L> where L::Target: Logger {
136 /// Creates a new router using the given [`NetworkGraph`] and [`Logger`].
137 pub fn new(network_graph: G, logger: L) -> Self {
138 Self { network_graph, logger }
142 impl<G: Deref<Target = NetworkGraph>, L: Deref, S: Score> Router<S> for DefaultRouter<G, L>
143 where L::Target: Logger {
145 &self, payer: &PublicKey, params: &RouteParameters, _payment_hash: &PaymentHash,
146 first_hops: Option<&[&ChannelDetails]>, scorer: &S
147 ) -> Result<Route, LightningError> {
148 find_route(payer, params, &*self.network_graph, first_hops, &*self.logger, scorer)
152 impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> Payer for ChannelManager<Signer, M, T, K, F, L>
154 M::Target: chain::Watch<Signer>,
155 T::Target: BroadcasterInterface,
156 K::Target: KeysInterface<Signer = Signer>,
157 F::Target: FeeEstimator,
160 fn node_id(&self) -> PublicKey {
161 self.get_our_node_id()
164 fn first_hops(&self) -> Vec<ChannelDetails> {
165 self.list_usable_channels()
169 &self, route: &Route, payment_hash: PaymentHash, payment_secret: &Option<PaymentSecret>
170 ) -> Result<PaymentId, PaymentSendFailure> {
171 self.send_payment(route, payment_hash, payment_secret)
174 fn send_spontaneous_payment(
175 &self, route: &Route, payment_preimage: PaymentPreimage,
176 ) -> Result<PaymentId, PaymentSendFailure> {
177 self.send_spontaneous_payment(route, Some(payment_preimage))
178 .map(|(_, payment_id)| payment_id)
182 &self, route: &Route, payment_id: PaymentId
183 ) -> Result<(), PaymentSendFailure> {
184 self.retry_payment(route, payment_id)
187 fn abandon_payment(&self, payment_id: PaymentId) {
188 self.abandon_payment(payment_id)
194 use core::time::Duration;
195 use {Currency, Description, InvoiceDescription};
196 use lightning::ln::PaymentHash;
197 use lightning::ln::channelmanager::MIN_FINAL_CLTV_EXPIRY;
198 use lightning::ln::functional_test_utils::*;
199 use lightning::ln::features::InitFeatures;
200 use lightning::ln::msgs::ChannelMessageHandler;
201 use lightning::routing::router::{Payee, RouteParameters, find_route};
202 use lightning::util::events::MessageSendEventsProvider;
203 use lightning::util::test_utils;
204 use utils::create_invoice_from_channelmanager_and_duration_since_epoch;
207 fn test_from_channelmanager() {
208 let chanmon_cfgs = create_chanmon_cfgs(2);
209 let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
210 let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, None]);
211 let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
212 let _chan = create_announced_chan_between_nodes(&nodes, 0, 1, InitFeatures::known(), InitFeatures::known());
213 let invoice = create_invoice_from_channelmanager_and_duration_since_epoch(
214 &nodes[1].node, nodes[1].keys_manager, Currency::BitcoinTestnet, Some(10_000), "test".to_string(),
215 Duration::from_secs(1234567)).unwrap();
216 assert_eq!(invoice.amount_pico_btc(), Some(100_000));
217 assert_eq!(invoice.min_final_cltv_expiry(), MIN_FINAL_CLTV_EXPIRY as u64);
218 assert_eq!(invoice.description(), InvoiceDescription::Direct(&Description("test".to_string())));
220 let payee = Payee::from_node_id(invoice.recover_payee_pub_key())
221 .with_features(invoice.features().unwrap().clone())
222 .with_route_hints(invoice.route_hints());
223 let params = RouteParameters {
225 final_value_msat: invoice.amount_milli_satoshis().unwrap(),
226 final_cltv_expiry_delta: invoice.min_final_cltv_expiry() as u32,
228 let first_hops = nodes[0].node.list_usable_channels();
229 let network_graph = node_cfgs[0].network_graph;
230 let logger = test_utils::TestLogger::new();
231 let scorer = test_utils::TestScorer::with_fixed_penalty(0);
232 let route = find_route(
233 &nodes[0].node.get_our_node_id(), ¶ms, network_graph,
234 Some(&first_hops.iter().collect::<Vec<_>>()), &logger, &scorer,
237 let payment_event = {
238 let mut payment_hash = PaymentHash([0; 32]);
239 payment_hash.0.copy_from_slice(&invoice.payment_hash().as_ref()[0..32]);
240 nodes[0].node.send_payment(&route, payment_hash, &Some(invoice.payment_secret().clone())).unwrap();
241 let mut added_monitors = nodes[0].chain_monitor.added_monitors.lock().unwrap();
242 assert_eq!(added_monitors.len(), 1);
243 added_monitors.clear();
245 let mut events = nodes[0].node.get_and_clear_pending_msg_events();
246 assert_eq!(events.len(), 1);
247 SendEvent::from_event(events.remove(0))
250 nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
251 nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &payment_event.commitment_msg);
252 let mut added_monitors = nodes[1].chain_monitor.added_monitors.lock().unwrap();
253 assert_eq!(added_monitors.len(), 1);
254 added_monitors.clear();
255 let events = nodes[1].node.get_and_clear_pending_msg_events();
256 assert_eq!(events.len(), 2);