Merge pull request #1208 from TheBlueMatt/2021-12-less-force-close
[rust-lightning] / lightning / src / ln / channelmanager.rs
index 9ad97150205a847ddaf1395ce88c4b2ba51a5228..f9f7b04402202a3aa9a45f8036b9a48fd58ec631 100644 (file)
@@ -413,6 +413,9 @@ struct PeerState {
 ///
 /// For users who don't want to bother doing their own payment preimage storage, we also store that
 /// here.
+///
+/// Note that this struct will be removed entirely soon, in favor of storing no inbound payment data
+/// and instead encoding it in the payment secret.
 struct PendingInboundPayment {
        /// The payment secret that the sender must use for us to accept this payment
        payment_secret: PaymentSecret,
@@ -2440,7 +2443,8 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
        /// Returns an [`APIError::APIMisuseError`] if the funding_transaction spent non-SegWit outputs
        /// or if no output was found which matches the parameters in [`Event::FundingGenerationReady`].
        ///
-       /// Panics if a funding transaction has already been provided for this channel.
+       /// Returns [`APIError::ChannelUnavailable`] if a funding transaction has already been provided
+       /// for the channel or if the channel has been closed as indicated by [`Event::ChannelClosed`].
        ///
        /// May panic if the output found in the funding transaction is duplicative with some other
        /// channel (note that this should be trivially prevented by using unique funding transaction
@@ -2455,6 +2459,7 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
        /// create a new channel with a conflicting funding transaction.
        ///
        /// [`Event::FundingGenerationReady`]: crate::util::events::Event::FundingGenerationReady
+       /// [`Event::ChannelClosed`]: crate::util::events::Event::ChannelClosed
        pub fn funding_transaction_generated(&self, temporary_channel_id: &[u8; 32], funding_transaction: Transaction) -> Result<(), APIError> {
                let _persistence_guard = PersistenceNotifierGuard::notify_on_drop(&self.total_consistency_lock, &self.persistence_notifier);
 
@@ -2658,7 +2663,7 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
                                                                                htlc_id: prev_htlc_id,
                                                                                incoming_packet_shared_secret: incoming_shared_secret,
                                                                        });
-                                                                       match chan.get_mut().send_htlc(amt_to_forward, payment_hash, outgoing_cltv_value, htlc_source.clone(), onion_packet) {
+                                                                       match chan.get_mut().send_htlc(amt_to_forward, payment_hash, outgoing_cltv_value, htlc_source.clone(), onion_packet, &self.logger) {
                                                                                Err(e) => {
                                                                                        if let ChannelError::Ignore(msg) = e {
                                                                                                log_trace!(self.logger, "Failed to forward HTLC with payment_hash {}: {}", log_bytes!(payment_hash.0), msg);
@@ -2897,7 +2902,6 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
                                                                                                        purpose: events::PaymentPurpose::InvoicePayment {
                                                                                                                payment_preimage: inbound_payment.get().payment_preimage,
                                                                                                                payment_secret: payment_data.payment_secret,
-                                                                                                               user_payment_id: inbound_payment.get().user_payment_id,
                                                                                                        },
                                                                                                        amt: total_value,
                                                                                                });
@@ -3351,19 +3355,21 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
                }
        }
 
-       /// Provides a payment preimage in response to a PaymentReceived event, returning true and
-       /// generating message events for the net layer to claim the payment, if possible. Thus, you
-       /// should probably kick the net layer to go send messages if this returns true!
+       /// Provides a payment preimage in response to [`Event::PaymentReceived`], generating any
+       /// [`MessageSendEvent`]s needed to claim the payment.
        ///
        /// Note that if you did not set an `amount_msat` when calling [`create_inbound_payment`] or
        /// [`create_inbound_payment_for_hash`] you must check that the amount in the `PaymentReceived`
        /// event matches your expectation. If you fail to do so and call this method, you may provide
        /// the sender "proof-of-payment" when they did not fulfill the full expected payment.
        ///
-       /// May panic if called except in response to a PaymentReceived event.
+       /// Returns whether any HTLCs were claimed, and thus if any new [`MessageSendEvent`]s are now
+       /// pending for processing via [`get_and_clear_pending_msg_events`].
        ///
+       /// [`Event::PaymentReceived`]: crate::util::events::Event::PaymentReceived
        /// [`create_inbound_payment`]: Self::create_inbound_payment
        /// [`create_inbound_payment_for_hash`]: Self::create_inbound_payment_for_hash
+       /// [`get_and_clear_pending_msg_events`]: MessageSendEventsProvider::get_and_clear_pending_msg_events
        pub fn claim_funds(&self, payment_preimage: PaymentPreimage) -> bool {
                let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0).into_inner());
 
@@ -3681,7 +3687,7 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
                }
 
                let channel = Channel::new_from_req(&self.fee_estimator, &self.keys_manager, counterparty_node_id.clone(),
-                               &their_features, msg, 0, &self.default_configuration, self.best_block.read().unwrap().height())
+                               &their_features, msg, 0, &self.default_configuration, self.best_block.read().unwrap().height(), &self.logger)
                        .map_err(|e| MsgHandleErrInternal::from_chan_no_close(e, msg.temporary_channel_id))?;
                let mut channel_state_lock = self.channel_state.lock().unwrap();
                let channel_state = &mut *channel_state_lock;
@@ -4553,7 +4559,7 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
                }
        }
 
-       fn set_payment_hash_secret_map(&self, payment_hash: PaymentHash, payment_preimage: Option<PaymentPreimage>, min_value_msat: Option<u64>, invoice_expiry_delta_secs: u32, user_payment_id: u64) -> Result<PaymentSecret, APIError> {
+       fn set_payment_hash_secret_map(&self, payment_hash: PaymentHash, payment_preimage: Option<PaymentPreimage>, min_value_msat: Option<u64>, invoice_expiry_delta_secs: u32) -> Result<PaymentSecret, APIError> {
                assert!(invoice_expiry_delta_secs <= 60*60*24*365); // Sadly bitcoin timestamps are u32s, so panic before 2106
 
                let payment_secret = PaymentSecret(self.keys_manager.get_secure_random_bytes());
@@ -4563,7 +4569,8 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
                match payment_secrets.entry(payment_hash) {
                        hash_map::Entry::Vacant(e) => {
                                e.insert(PendingInboundPayment {
-                                       payment_secret, min_value_msat, user_payment_id, payment_preimage,
+                                       payment_secret, min_value_msat, payment_preimage,
+                                       user_payment_id: 0, // For compatibility with version 0.0.103 and earlier
                                        // We assume that highest_seen_timestamp is pretty close to the current time -
                                        // its updated when we receive a new block with the maximum time we've seen in
                                        // a header. It should never be more than two hours in the future.
@@ -4595,12 +4602,12 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
        /// [`PaymentReceived`]: events::Event::PaymentReceived
        /// [`PaymentReceived::payment_preimage`]: events::Event::PaymentReceived::payment_preimage
        /// [`create_inbound_payment_for_hash`]: Self::create_inbound_payment_for_hash
-       pub fn create_inbound_payment(&self, min_value_msat: Option<u64>, invoice_expiry_delta_secs: u32, user_payment_id: u64) -> (PaymentHash, PaymentSecret) {
+       pub fn create_inbound_payment(&self, min_value_msat: Option<u64>, invoice_expiry_delta_secs: u32) -> (PaymentHash, PaymentSecret) {
                let payment_preimage = PaymentPreimage(self.keys_manager.get_secure_random_bytes());
                let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0).into_inner());
 
                (payment_hash,
-                       self.set_payment_hash_secret_map(payment_hash, Some(payment_preimage), min_value_msat, invoice_expiry_delta_secs, user_payment_id)
+                       self.set_payment_hash_secret_map(payment_hash, Some(payment_preimage), min_value_msat, invoice_expiry_delta_secs)
                                .expect("RNG Generated Duplicate PaymentHash"))
        }
 
@@ -4614,12 +4621,6 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
        /// The [`PaymentHash`] (and corresponding [`PaymentPreimage`]) must be globally unique. This
        /// method may return an Err if another payment with the same payment_hash is still pending.
        ///
-       /// `user_payment_id` will be provided back in [`PaymentPurpose::InvoicePayment::user_payment_id`] events to
-       /// allow tracking of which events correspond with which calls to this and
-       /// [`create_inbound_payment`]. `user_payment_id` has no meaning inside of LDK, it is simply
-       /// copied to events and otherwise ignored. It may be used to correlate PaymentReceived events
-       /// with invoice metadata stored elsewhere.
-       ///
        /// `min_value_msat` should be set if the invoice being generated contains a value. Any payment
        /// received for the returned [`PaymentHash`] will be required to be at least `min_value_msat`
        /// before a [`PaymentReceived`] event will be generated, ensuring that we do not provide the
@@ -4648,9 +4649,8 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
        ///
        /// [`create_inbound_payment`]: Self::create_inbound_payment
        /// [`PaymentReceived`]: events::Event::PaymentReceived
-       /// [`PaymentPurpose::InvoicePayment::user_payment_id`]: events::PaymentPurpose::InvoicePayment::user_payment_id
-       pub fn create_inbound_payment_for_hash(&self, payment_hash: PaymentHash, min_value_msat: Option<u64>, invoice_expiry_delta_secs: u32, user_payment_id: u64) -> Result<PaymentSecret, APIError> {
-               self.set_payment_hash_secret_map(payment_hash, None, min_value_msat, invoice_expiry_delta_secs, user_payment_id)
+       pub fn create_inbound_payment_for_hash(&self, payment_hash: PaymentHash, min_value_msat: Option<u64>, invoice_expiry_delta_secs: u32) -> Result<PaymentSecret, APIError> {
+               self.set_payment_hash_secret_map(payment_hash, None, min_value_msat, invoice_expiry_delta_secs)
        }
 
        #[cfg(any(test, feature = "fuzztarget", feature = "_test_utils"))]
@@ -5910,6 +5910,7 @@ impl<'a, Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref>
                                                reason: ClosureReason::OutdatedChannelManager
                                        });
                                } else {
+                                       log_info!(args.logger, "Successfully loaded channel {}", log_bytes!(channel.channel_id()));
                                        if let Some(short_channel_id) = channel.get_short_channel_id() {
                                                short_to_id.insert(short_channel_id, channel.channel_id());
                                        }
@@ -5927,6 +5928,7 @@ impl<'a, Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref>
 
                for (ref funding_txo, ref mut monitor) in args.channel_monitors.iter_mut() {
                        if !funding_txo_set.contains(funding_txo) {
+                               log_info!(args.logger, "Broadcasting latest holder commitment transaction for closed channel {}", log_bytes!(funding_txo.to_channel_id()));
                                monitor.broadcast_latest_holder_commitment_txn(&args.tx_broadcaster, &args.logger);
                        }
                }
@@ -6733,7 +6735,7 @@ pub mod bench {
                                payment_preimage.0[0..8].copy_from_slice(&payment_count.to_le_bytes());
                                payment_count += 1;
                                let payment_hash = PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner());
-                               let payment_secret = $node_b.create_inbound_payment_for_hash(payment_hash, None, 7200, 0).unwrap();
+                               let payment_secret = $node_b.create_inbound_payment_for_hash(payment_hash, None, 7200).unwrap();
 
                                $node_a.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
                                let payment_event = SendEvent::from_event($node_a.get_and_clear_pending_msg_events().pop().unwrap());