Expose `onion_message` items directly rather than via re-exports
[rust-lightning] / lightning / src / events / mod.rs
index bb98e271597309d057ca4712b394e302b35cddc3..dede02a37cb9c5e6349dfb27e7504cc3b1fb83fc 100644 (file)
@@ -30,8 +30,9 @@ use crate::util::ser::{BigSize, FixedLengthReader, Writeable, Writer, MaybeReada
 use crate::util::string::UntrustedString;
 use crate::routing::router::{BlindedTail, Path, RouteHop, RouteParameters};
 
-use bitcoin::{PackedLockTime, Transaction, OutPoint};
-use bitcoin::blockdata::script::Script;
+use bitcoin::{Transaction, OutPoint};
+use bitcoin::blockdata::locktime::absolute::LockTime;
+use bitcoin::blockdata::script::ScriptBuf;
 use bitcoin::hashes::Hash;
 use bitcoin::hashes::sha256::Hash as Sha256;
 use bitcoin::secp256k1::PublicKey;
@@ -71,6 +72,16 @@ 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),
@@ -102,9 +113,15 @@ pub struct ClaimedHTLC {
        pub cltv_expiry: u32,
        /// The amount (in msats) of this part of an MPP.
        pub value_msat: u64,
+       /// The extra fee our counterparty skimmed off the top of this HTLC, if any.
+       ///
+       /// This value will always be 0 for [`ClaimedHTLC`]s serialized with LDK versions prior to
+       /// 0.0.119.
+       pub counterparty_skimmed_fee_msat: u64,
 }
 impl_writeable_tlv_based!(ClaimedHTLC, {
        (0, channel_id, required),
+       (1, counterparty_skimmed_fee_msat, (default_value, 0u64)),
        (2, user_channel_id, required),
        (4, cltv_expiry, required),
        (6, value_msat, required),
@@ -199,6 +216,9 @@ pub enum ClosureReason {
        /// The counterparty requested a cooperative close of a channel that had not been funded yet.
        /// The channel has been immediately closed.
        CounterpartyCoopClosedUnfundedChannel,
+       /// Another channel in the same funding batch closed before the funding transaction
+       /// was ready to be broadcast.
+       FundingBatchClosure,
 }
 
 impl core::fmt::Display for ClosureReason {
@@ -219,6 +239,7 @@ impl core::fmt::Display for ClosureReason {
                        ClosureReason::DisconnectedPeer => f.write_str("the peer disconnected prior to the channel being funded"),
                        ClosureReason::OutdatedChannelManager => f.write_str("the ChannelManager read from disk was stale compared to ChannelMonitor(s)"),
                        ClosureReason::CounterpartyCoopClosedUnfundedChannel => f.write_str("the peer requested the unfunded channel be closed"),
+                       ClosureReason::FundingBatchClosure => f.write_str("another channel in the same funding batch closed"),
                }
        }
 }
@@ -233,6 +254,7 @@ impl_writeable_tlv_based_enum_upgradable!(ClosureReason,
        (10, DisconnectedPeer) => {},
        (12, OutdatedChannelManager) => {},
        (13, CounterpartyCoopClosedUnfundedChannel) => {},
+       (15, FundingBatchClosure) => {}
 );
 
 /// Intended destination of a failed HTLC as indicated in [`Event::HTLCHandlingFailed`].
@@ -373,7 +395,7 @@ pub enum Event {
                /// The value, in satoshis, that the output should have.
                channel_value_satoshis: u64,
                /// The script which should be used in the transaction output.
-               output_script: Script,
+               output_script: ScriptBuf,
                /// The `user_channel_id` value passed in to [`ChannelManager::create_channel`] for outbound
                /// channels, or to [`ChannelManager::accept_inbound_channel`] for inbound channels if
                /// [`UserConfig::manually_accept_inbound_channels`] config flag is set to true. Otherwise
@@ -508,10 +530,33 @@ 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`].
+       /// 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.
        ///
        /// [`ChannelManager::abandon_payment`]: crate::ln::channelmanager::ChannelManager::abandon_payment
+       /// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
+       /// [`Offer`]: crate::offers::offer::Offer
+       /// [`Refund`]: crate::offers::refund::Refund
        InvoiceRequestFailed {
                /// The `payment_id` to have been associated with payment for the requested invoice.
                payment_id: PaymentId,
@@ -844,6 +889,8 @@ pub enum Event {
        },
        /// Used to indicate to the user that they can abandon the funding transaction and recycle the
        /// inputs for another purpose.
+       ///
+       /// This event is not guaranteed to be generated for channels that are closed due to a restart.
        DiscardFunding {
                /// The channel_id of the channel which has been closed.
                channel_id: ChannelId,
@@ -1162,6 +1209,10 @@ 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`.
@@ -1172,8 +1223,7 @@ 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 = || {
@@ -1236,7 +1286,7 @@ impl MaybeReadable for Event {
                                                (5, fee_paid_msat, option),
                                        });
                                        if payment_hash.is_none() {
-                                               payment_hash = Some(PaymentHash(Sha256::hash(&payment_preimage.0[..]).into_inner()));
+                                               payment_hash = Some(PaymentHash(Sha256::hash(&payment_preimage.0[..]).to_byte_array()));
                                        }
                                        Ok(Some(Event::PaymentSent {
                                                payment_id,
@@ -1378,7 +1428,7 @@ impl MaybeReadable for Event {
                        11u8 => {
                                let f = || {
                                        let mut channel_id = ChannelId::new_zero();
-                                       let mut transaction = Transaction{ version: 2, lock_time: PackedLockTime::ZERO, input: Vec::new(), output: Vec::new() };
+                                       let mut transaction = Transaction{ version: 2, lock_time: LockTime::ZERO, input: Vec::new(), output: Vec::new() };
                                        read_tlv_fields!(reader, {
                                                (0, channel_id, required),
                                                (2, transaction, required),
@@ -1560,6 +1610,8 @@ 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.
@@ -1631,6 +1683,34 @@ pub enum MessageSendEvent {
                /// The message which should be sent.
                msg: msgs::FundingSigned,
        },
+       /// Used to indicate that a stfu message should be sent to the peer with the given node id.
+       SendStfu {
+               /// The node_id of the node which should receive this message
+               node_id: PublicKey,
+               /// The message which should be sent.
+               msg: msgs::Stfu,
+       },
+       /// Used to indicate that a splice message should be sent to the peer with the given node id.
+       SendSplice {
+               /// The node_id of the node which should receive this message
+               node_id: PublicKey,
+               /// The message which should be sent.
+               msg: msgs::Splice,
+       },
+       /// Used to indicate that a splice_ack message should be sent to the peer with the given node id.
+       SendSpliceAck {
+               /// The node_id of the node which should receive this message
+               node_id: PublicKey,
+               /// The message which should be sent.
+               msg: msgs::SpliceAck,
+       },
+       /// Used to indicate that a splice_locked message should be sent to the peer with the given node id.
+       SendSpliceLocked {
+               /// The node_id of the node which should receive this message
+               node_id: PublicKey,
+               /// The message which should be sent.
+               msg: msgs::SpliceLocked,
+       },
        /// Used to indicate that a tx_add_input message should be sent to the peer with the given node_id.
        SendTxAddInput {
                /// The node_id of the node which should receive this message
@@ -1836,12 +1916,6 @@ pub trait MessageSendEventsProvider {
        fn get_and_clear_pending_msg_events(&self) -> Vec<MessageSendEvent>;
 }
 
-/// A trait indicating an object may generate onion messages to send
-pub trait OnionMessageProvider {
-       /// Gets the next pending onion message for the peer with the given node id.
-       fn next_onion_message_for_peer(&self, peer_node_id: PublicKey) -> Option<msgs::OnionMessage>;
-}
-
 /// A trait indicating an object may generate events.
 ///
 /// Events are processed by passing an [`EventHandler`] to [`process_pending_events`].