Cfg-gate async payments module and public enum variants.
[rust-lightning] / lightning / src / ln / channelmanager.rs
index ef6089d3c5094173da88c7ec7c7b8600d253ff8a..fe3320a136029fa4a4504ccf906c1f8a2642150e 100644 (file)
@@ -58,7 +58,7 @@ use crate::ln::onion_utils::{HTLCFailReason, INVALID_ONION_BLINDING};
 use crate::ln::msgs::{ChannelMessageHandler, DecodeError, LightningError};
 #[cfg(test)]
 use crate::ln::outbound_payment;
-use crate::ln::outbound_payment::{Bolt12PaymentError, OutboundPayments, PaymentAttempts, PendingOutboundPayment, SendAlongPathArgs, StaleExpiration};
+use crate::ln::outbound_payment::{OutboundPayments, PaymentAttempts, PendingOutboundPayment, SendAlongPathArgs, StaleExpiration};
 use crate::ln::wire::Encode;
 use crate::offers::invoice::{BlindedPayInfo, Bolt12Invoice, DEFAULT_RELATIVE_EXPIRY, DerivedSigningPubkey, ExplicitSigningPubkey, InvoiceBuilder, UnsignedBolt12Invoice};
 use crate::offers::invoice_error::InvoiceError;
@@ -105,7 +105,7 @@ use core::time::Duration;
 use core::ops::Deref;
 
 // Re-export this for use in the public API.
-pub use crate::ln::outbound_payment::{PaymentSendFailure, ProbeSendFailure, Retry, RetryableSendFailure, RecipientOnionFields};
+pub use crate::ln::outbound_payment::{Bolt12PaymentError, PaymentSendFailure, ProbeSendFailure, Retry, RetryableSendFailure, RecipientOnionFields};
 use crate::ln::script::ShutdownScript;
 
 // We hold various information about HTLC relay in the HTLC objects in Channel itself:
@@ -965,7 +965,7 @@ const UNACCEPTED_INBOUND_CHANNEL_AGE_LIMIT_TICKS: i32 = 2;
 /// The number of blocks of historical feerate estimates we keep around and consider when deciding
 /// to force-close a channel for having too-low fees. Also the number of blocks we have to see
 /// after startup before we consider force-closing channels for having too-low fees.
-const FEERATE_TRACKING_BLOCKS: usize = 144;
+pub(super) const FEERATE_TRACKING_BLOCKS: usize = 144;
 
 /// Stores a PaymentSecret and any other data we may need to validate an inbound payment is
 /// actually ours and not some duplicate HTLC sent to us by a node along the route.
@@ -3188,7 +3188,7 @@ where
                                                }
                                        } else {
                                                let mut chan_phase = remove_channel_phase!(self, chan_phase_entry);
-                                               shutdown_result = Some(chan_phase.context_mut().force_shutdown(false, ClosureReason::HolderForceClosed));
+                                               shutdown_result = Some(chan_phase.context_mut().force_shutdown(false, ClosureReason::HolderForceClosed { broadcasted_latest_txn: Some(false) }));
                                        }
                                },
                                hash_map::Entry::Vacant(_) => {
@@ -3357,7 +3357,7 @@ where
                        let closure_reason = if let Some(peer_msg) = peer_msg {
                                ClosureReason::CounterpartyForceClosed { peer_msg: UntrustedString(peer_msg.to_string()) }
                        } else {
-                               ClosureReason::HolderForceClosed
+                               ClosureReason::HolderForceClosed { broadcasted_latest_txn: Some(broadcast) }
                        };
                        let logger = WithContext::from(&self.logger, Some(*peer_node_id), Some(*channel_id), None);
                        if let hash_map::Entry::Occupied(chan_phase_entry) = peer_state.channel_by_id.entry(channel_id.clone()) {
@@ -3996,7 +3996,36 @@ where
                self.pending_outbound_payments.test_set_payment_metadata(payment_id, new_payment_metadata);
        }
 
-       pub(super) fn send_payment_for_bolt12_invoice(&self, invoice: &Bolt12Invoice, payment_id: PaymentId) -> Result<(), Bolt12PaymentError> {
+       /// Pays the [`Bolt12Invoice`] associated with the `payment_id` encoded in its `payer_metadata`.
+       ///
+       /// The invoice's `payer_metadata` is used to authenticate that the invoice was indeed requested
+       /// before attempting a payment. [`Bolt12PaymentError::UnexpectedInvoice`] is returned if this
+       /// fails or if the encoded `payment_id` is not recognized. The latter may happen once the
+       /// payment is no longer tracked because the payment was attempted after:
+       /// - an invoice for the `payment_id` was already paid,
+       /// - one full [timer tick] has elapsed since initially requesting the invoice when paying an
+       ///   offer, or
+       /// - the refund corresponding to the invoice has already expired.
+       ///
+       /// To retry the payment, request another invoice using a new `payment_id`.
+       ///
+       /// Attempting to pay the same invoice twice while the first payment is still pending will
+       /// result in a [`Bolt12PaymentError::DuplicateInvoice`].
+       ///
+       /// Otherwise, either [`Event::PaymentSent`] or [`Event::PaymentFailed`] are used to indicate
+       /// whether or not the payment was successful.
+       ///
+       /// [timer tick]: Self::timer_tick_occurred
+       pub fn send_payment_for_bolt12_invoice(&self, invoice: &Bolt12Invoice) -> Result<(), Bolt12PaymentError> {
+               let secp_ctx = &self.secp_ctx;
+               let expanded_key = &self.inbound_payment_key;
+               match invoice.verify(expanded_key, secp_ctx) {
+                       Ok(payment_id) => self.send_payment_for_verified_bolt12_invoice(invoice, payment_id),
+                       Err(()) => Err(Bolt12PaymentError::UnexpectedInvoice),
+               }
+       }
+
+       fn send_payment_for_verified_bolt12_invoice(&self, invoice: &Bolt12Invoice, payment_id: PaymentId) -> Result<(), Bolt12PaymentError> {
                let best_block_height = self.best_block.read().unwrap().height;
                let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(self);
                self.pending_outbound_payments
@@ -5531,7 +5560,7 @@ where
                                        log_error!(logger,
                                                "Force-closing pending channel with ID {} for not establishing in a timely manner", chan_id);
                                        update_maps_on_chan_removal!(self, &context);
-                                       shutdown_channels.push(context.force_shutdown(false, ClosureReason::HolderForceClosed));
+                                       shutdown_channels.push(context.force_shutdown(false, ClosureReason::HolderForceClosed { broadcasted_latest_txn: Some(false) }));
                                        pending_msg_events.push(MessageSendEvent::HandleError {
                                                node_id: counterparty_node_id,
                                                action: msgs::ErrorAction::SendErrorMessage {
@@ -6633,7 +6662,7 @@ where
                log_trace!(logger, "ChannelMonitor updated to {}. Current highest is {}. {} pending in-flight updates.",
                        highest_applied_update_id, channel.context.get_latest_monitor_update_id(),
                        remaining_in_flight);
-               if !channel.is_awaiting_monitor_update() || channel.context.get_latest_monitor_update_id() != highest_applied_update_id {
+               if !channel.is_awaiting_monitor_update() || remaining_in_flight != 0 {
                        return;
                }
                handle_monitor_update_completion!(self, peer_state_lock, peer_state, per_peer_state, channel);
@@ -8018,7 +8047,7 @@ where
                                                                                let reason = if let MonitorEvent::HolderForceClosedWithInfo { reason, .. } = monitor_event {
                                                                                        reason
                                                                                } else {
-                                                                                       ClosureReason::HolderForceClosed
+                                                                                       ClosureReason::HolderForceClosed { broadcasted_latest_txn: Some(true) }
                                                                                };
                                                                                failed_channels.push(chan.context.force_shutdown(false, reason.clone()));
                                                                                if let Ok(update) = self.get_channel_update_for_broadcast(&chan) {
@@ -10272,42 +10301,56 @@ where
                                };
 
                                match response {
-                                       Ok(invoice) => return responder.respond(OffersMessage::Invoice(invoice)),
-                                       Err(error) => return responder.respond(OffersMessage::InvoiceError(error.into())),
+                                       Ok(invoice) => responder.respond(OffersMessage::Invoice(invoice)),
+                                       Err(error) => responder.respond(OffersMessage::InvoiceError(error.into())),
                                }
                        },
                        OffersMessage::Invoice(invoice) => {
-                               let response = invoice
-                                       .verify(expanded_key, secp_ctx)
-                                       .map_err(|()| InvoiceError::from_string("Unrecognized invoice".to_owned()))
-                                       .and_then(|payment_id| {
+                               let result = match invoice.verify(expanded_key, secp_ctx) {
+                                       Ok(payment_id) => {
                                                let features = self.bolt12_invoice_features();
                                                if invoice.invoice_features().requires_unknown_bits_from(&features) {
                                                        Err(InvoiceError::from(Bolt12SemanticError::UnknownRequiredFeatures))
+                                               } else if self.default_configuration.manually_handle_bolt12_invoices {
+                                                       let event = Event::InvoiceReceived { payment_id, invoice, responder };
+                                                       self.pending_events.lock().unwrap().push_back((event, None));
+                                                       return ResponseInstruction::NoResponse;
                                                } else {
-                                                       self.send_payment_for_bolt12_invoice(&invoice, payment_id)
+                                                       self.send_payment_for_verified_bolt12_invoice(&invoice, payment_id)
                                                                .map_err(|e| {
                                                                        log_trace!(self.logger, "Failed paying invoice: {:?}", e);
                                                                        InvoiceError::from_string(format!("{:?}", e))
                                                                })
                                                }
-                                       });
+                                       },
+                                       Err(()) => Err(InvoiceError::from_string("Unrecognized invoice".to_owned())),
+                               };
 
-                               match (responder, response) {
-                                       (Some(responder), Err(e)) => responder.respond(OffersMessage::InvoiceError(e)),
-                                       (None, Err(_)) => {
-                                               log_trace!(
-                                                       self.logger,
-                                                       "A response was generated, but there is no reply_path specified for sending the response."
-                                               );
-                                               return ResponseInstruction::NoResponse;
-                                       }
-                                       _ => return ResponseInstruction::NoResponse,
+                               match result {
+                                       Ok(()) => ResponseInstruction::NoResponse,
+                                       Err(e) => match responder {
+                                               Some(responder) => responder.respond(OffersMessage::InvoiceError(e)),
+                                               None => {
+                                                       log_trace!(self.logger, "No reply path for sending invoice error: {:?}", e);
+                                                       ResponseInstruction::NoResponse
+                                               },
+                                       },
+                               }
+                       },
+                       #[cfg(async_payments)]
+                       OffersMessage::StaticInvoice(_invoice) => {
+                               match responder {
+                                       Some(responder) => {
+                                               responder.respond(OffersMessage::InvoiceError(
+                                                               InvoiceError::from_string("Static invoices not yet supported".to_string())
+                                               ))
+                                       },
+                                       None => return ResponseInstruction::NoResponse,
                                }
                        },
                        OffersMessage::InvoiceError(invoice_error) => {
                                log_trace!(self.logger, "Received invoice_error: {}", invoice_error);
-                               return ResponseInstruction::NoResponse;
+                               ResponseInstruction::NoResponse
                        },
                }
        }
@@ -12584,7 +12627,7 @@ mod tests {
 
                nodes[0].node.force_close_channel_with_peer(&chan.2, &nodes[1].node.get_our_node_id(), None, true).unwrap();
                check_added_monitors!(nodes[0], 1);
-               check_closed_event!(nodes[0], 1, ClosureReason::HolderForceClosed, [nodes[1].node.get_our_node_id()], 100000);
+               check_closed_event!(nodes[0], 1, ClosureReason::HolderForceClosed { broadcasted_latest_txn: Some(true) }, [nodes[1].node.get_our_node_id()], 100000);
 
                // Confirm that the channel_update was not sent immediately to node[1] but was cached.
                let node_1_events = nodes[1].node.get_and_clear_pending_msg_events();
@@ -12643,7 +12686,7 @@ mod tests {
                nodes[0].node.force_close_broadcasting_latest_txn(&chan.2, &nodes[1].node.get_our_node_id(), error_message.to_string()).unwrap();
                check_closed_broadcast!(nodes[0], true);
                check_added_monitors!(nodes[0], 1);
-               check_closed_event!(nodes[0], 1, ClosureReason::HolderForceClosed, [nodes[1].node.get_our_node_id()], 100000);
+               check_closed_event!(nodes[0], 1, ClosureReason::HolderForceClosed { broadcasted_latest_txn: Some(true) }, [nodes[1].node.get_our_node_id()], 100000);
 
                {
                        // Assert that nodes[1] is awaiting removal for nodes[0] once nodes[1] has been
@@ -13380,7 +13423,7 @@ mod tests {
                nodes[0].node.force_close_broadcasting_latest_txn(&chan_id, &nodes[1].node.get_our_node_id(), error_message.to_string()).unwrap();
                check_closed_broadcast(&nodes[0], 1, true);
                check_added_monitors(&nodes[0], 1);
-               check_closed_event!(nodes[0], 1, ClosureReason::HolderForceClosed, [nodes[1].node.get_our_node_id()], 100000);
+               check_closed_event!(nodes[0], 1, ClosureReason::HolderForceClosed { broadcasted_latest_txn: Some(true) }, [nodes[1].node.get_our_node_id()], 100000);
                {
                        let txn = nodes[0].tx_broadcaster.txn_broadcast();
                        assert_eq!(txn.len(), 1);