Add c_bindings version of RefundBuilder
[rust-lightning] / lightning / src / events / mod.rs
index adbc7faf7e0f9d0acf1fa3349495733669d41193..77f6937c54558aae85d10a3c1c8cc9c05bc5d424 100644 (file)
@@ -24,6 +24,7 @@ use crate::ln::channel::FUNDING_CONF_DEADLINE_BLOCKS;
 use crate::ln::features::ChannelTypeFeatures;
 use crate::ln::msgs;
 use crate::ln::{ChannelId, PaymentPreimage, PaymentHash, PaymentSecret};
+use crate::chain::transaction;
 use crate::routing::gossip::NetworkUpdate;
 use crate::util::errors::APIError;
 use crate::util::ser::{BigSize, FixedLengthReader, Writeable, Writer, MaybeReadable, Readable, RequiredWrapper, UpgradableRequired, WithoutLength};
@@ -72,6 +73,16 @@ pub enum PaymentPurpose {
        SpontaneousPayment(PaymentPreimage),
 }
 
+impl PaymentPurpose {
+       /// Returns the preimage for this payment, if it is known.
+       pub fn preimage(&self) -> Option<PaymentPreimage> {
+               match self {
+                       PaymentPurpose::InvoicePayment { payment_preimage, .. } => *payment_preimage,
+                       PaymentPurpose::SpontaneousPayment(preimage) => Some(*preimage),
+               }
+       }
+}
+
 impl_writeable_tlv_based_enum!(PaymentPurpose,
        (0, InvoicePayment) => {
                (0, payment_preimage, option),
@@ -520,6 +531,25 @@ pub enum Event {
                /// serialized prior to LDK version 0.0.117.
                sender_intended_total_msat: Option<u64>,
        },
+       /// Indicates that a peer connection with a node is needed in order to send an [`OnionMessage`].
+       ///
+       /// Typically, this happens when a [`MessageRouter`] is unable to find a complete path to a
+       /// [`Destination`]. Once a connection is established, any messages buffered by an
+       /// [`OnionMessageHandler`] may be sent.
+       ///
+       /// This event will not be generated for onion message forwards; only for sends including
+       /// replies. Handlers should connect to the node otherwise any buffered messages may be lost.
+       ///
+       /// [`OnionMessage`]: msgs::OnionMessage
+       /// [`MessageRouter`]: crate::onion_message::messenger::MessageRouter
+       /// [`Destination`]: crate::onion_message::messenger::Destination
+       /// [`OnionMessageHandler`]: crate::ln::msgs::OnionMessageHandler
+       ConnectionNeeded {
+               /// The node id for the node needing a connection.
+               node_id: PublicKey,
+               /// Sockets for connecting to the node.
+               addresses: Vec<msgs::SocketAddress>,
+       },
        /// Indicates a request for an invoice failed to yield a response in a reasonable amount of time
        /// or was explicitly abandoned by [`ChannelManager::abandon_payment`]. This may be for an
        /// [`InvoiceRequest`] sent for an [`Offer`] or for a [`Refund`] that hasn't been redeemed.
@@ -832,7 +862,7 @@ pub enum Event {
        ///
        /// [`ChannelManager::accept_inbound_channel`]: crate::ln::channelmanager::ChannelManager::accept_inbound_channel
        /// [`UserConfig::manually_accept_inbound_channels`]: crate::util::config::UserConfig::manually_accept_inbound_channels
-       ChannelClosed  {
+       ChannelClosed {
                /// The `channel_id` of the channel which has been closed. Note that on-chain transactions
                /// resolving the channel are likely still awaiting confirmation.
                channel_id: ChannelId,
@@ -857,6 +887,10 @@ pub enum Event {
                ///
                /// This field will be `None` for objects serialized prior to LDK 0.0.117.
                channel_capacity_sats: Option<u64>,
+               /// The original channel funding TXO; this helps checking for the existence and confirmation
+               /// status of the closing tx.
+               /// Note that for instances serialized in v0.0.119 or prior this will be missing (None).
+               channel_funding_txo: Option<transaction::OutPoint>,
        },
        /// Used to indicate to the user that they can abandon the funding transaction and recycle the
        /// inputs for another purpose.
@@ -1062,7 +1096,7 @@ impl Writeable for Event {
                                });
                        },
                        &Event::ChannelClosed { ref channel_id, ref user_channel_id, ref reason,
-                               ref counterparty_node_id, ref channel_capacity_sats
+                               ref counterparty_node_id, ref channel_capacity_sats, ref channel_funding_txo
                        } => {
                                9u8.write(writer)?;
                                // `user_channel_id` used to be a single u64 value. In order to remain backwards
@@ -1077,6 +1111,7 @@ impl Writeable for Event {
                                        (3, user_channel_id_high, required),
                                        (5, counterparty_node_id, option),
                                        (7, channel_capacity_sats, option),
+                                       (9, channel_funding_txo, option),
                                });
                        },
                        &Event::DiscardFunding { ref channel_id, ref transaction } => {
@@ -1180,6 +1215,10 @@ impl Writeable for Event {
                                        (0, payment_id, required),
                                })
                        },
+                       &Event::ConnectionNeeded { .. } => {
+                               35u8.write(writer)?;
+                               // Never write ConnectionNeeded events as buffered onion messages aren't serialized.
+                       },
                        // Note that, going forward, all new events must only write data inside of
                        // `write_tlv_fields`. Versions 0.0.101+ will ignore odd-numbered events that write
                        // data via `write_tlv_fields`.
@@ -1190,8 +1229,7 @@ impl Writeable for Event {
 impl MaybeReadable for Event {
        fn read<R: io::Read>(reader: &mut R) -> Result<Option<Self>, msgs::DecodeError> {
                match Readable::read(reader)? {
-                       // Note that we do not write a length-prefixed TLV for FundingGenerationReady events,
-                       // unlike all other events, thus we return immediately here.
+                       // Note that we do not write a length-prefixed TLV for FundingGenerationReady events.
                        0u8 => Ok(None),
                        1u8 => {
                                let f = || {
@@ -1373,6 +1411,7 @@ impl MaybeReadable for Event {
                                        let mut user_channel_id_high_opt: Option<u64> = None;
                                        let mut counterparty_node_id = None;
                                        let mut channel_capacity_sats = None;
+                                       let mut channel_funding_txo = None;
                                        read_tlv_fields!(reader, {
                                                (0, channel_id, required),
                                                (1, user_channel_id_low_opt, option),
@@ -1380,6 +1419,7 @@ impl MaybeReadable for Event {
                                                (3, user_channel_id_high_opt, option),
                                                (5, counterparty_node_id, option),
                                                (7, channel_capacity_sats, option),
+                                               (9, channel_funding_txo, option),
                                        });
 
                                        // `user_channel_id` used to be a single u64 value. In order to remain
@@ -1389,7 +1429,7 @@ impl MaybeReadable for Event {
                                                ((user_channel_id_high_opt.unwrap_or(0) as u128) << 64);
 
                                        Ok(Some(Event::ChannelClosed { channel_id, user_channel_id, reason: _init_tlv_based_struct_field!(reason, upgradable_required),
-                                               counterparty_node_id, channel_capacity_sats }))
+                                               counterparty_node_id, channel_capacity_sats, channel_funding_txo }))
                                };
                                f()
                        },
@@ -1578,6 +1618,8 @@ impl MaybeReadable for Event {
                                };
                                f()
                        },
+                       // Note that we do not write a length-prefixed TLV for ConnectionNeeded events.
+                       35u8 => Ok(None),
                        // Versions prior to 0.0.100 did not ignore odd types, instead returning InvalidValue.
                        // Version 0.0.100 failed to properly ignore odd types, possibly resulting in corrupt
                        // reads.