Sort `Event` variants somewhat more sensibly
[rust-lightning] / lightning / src / util / events.rs
index c86df5dff693f540baca838ca77fafc05e379b99..f35dc14e03555bed83d94e48c9702e6d50a36bc9 100644 (file)
@@ -17,6 +17,7 @@
 use chain::keysinterface::SpendableOutputDescriptor;
 use ln::channelmanager::PaymentId;
 use ln::channel::FUNDING_CONF_DEADLINE_BLOCKS;
+use ln::features::ChannelTypeFeatures;
 use ln::msgs;
 use ln::msgs::DecodeError;
 use ln::{PaymentPreimage, PaymentHash, PaymentSecret};
@@ -229,6 +230,47 @@ pub enum Event {
                /// [`Route::get_total_fees`]: crate::routing::router::Route::get_total_fees
                fee_paid_msat: Option<u64>,
        },
+       /// Indicates an outbound payment failed. Individual [`Event::PaymentPathFailed`] events
+       /// provide failure information for each MPP part in the payment.
+       ///
+       /// This event is provided once there are no further pending HTLCs for the payment and the
+       /// payment is no longer retryable, either due to a several-block timeout or because
+       /// [`ChannelManager::abandon_payment`] was previously called for the corresponding payment.
+       ///
+       /// [`ChannelManager::abandon_payment`]: crate::ln::channelmanager::ChannelManager::abandon_payment
+       PaymentFailed {
+               /// The id returned by [`ChannelManager::send_payment`] and used with
+               /// [`ChannelManager::retry_payment`] and [`ChannelManager::abandon_payment`].
+               ///
+               /// [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
+               /// [`ChannelManager::retry_payment`]: crate::ln::channelmanager::ChannelManager::retry_payment
+               /// [`ChannelManager::abandon_payment`]: crate::ln::channelmanager::ChannelManager::abandon_payment
+               payment_id: PaymentId,
+               /// The hash that was given to [`ChannelManager::send_payment`].
+               ///
+               /// [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
+               payment_hash: PaymentHash,
+       },
+       /// Indicates that a path for an outbound payment was successful.
+       ///
+       /// Always generated after [`Event::PaymentSent`] and thus useful for scoring channels. See
+       /// [`Event::PaymentSent`] for obtaining the payment preimage.
+       PaymentPathSuccessful {
+               /// The id returned by [`ChannelManager::send_payment`] and used with
+               /// [`ChannelManager::retry_payment`].
+               ///
+               /// [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
+               /// [`ChannelManager::retry_payment`]: crate::ln::channelmanager::ChannelManager::retry_payment
+               payment_id: PaymentId,
+               /// The hash that was given to [`ChannelManager::send_payment`].
+               ///
+               /// [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
+               payment_hash: Option<PaymentHash>,
+               /// The payment path that was successful.
+               ///
+               /// May contain a closed channel if the HTLC sent along the path was fulfilled on chain.
+               path: Vec<RouteHop>,
+       },
        /// Indicates an outbound HTLC we sent failed. Probably some intermediary node dropped
        /// something. You may wish to retry with a different route.
        ///
@@ -298,27 +340,6 @@ pub enum Event {
 #[cfg(test)]
                error_data: Option<Vec<u8>>,
        },
-       /// Indicates an outbound payment failed. Individual [`Event::PaymentPathFailed`] events
-       /// provide failure information for each MPP part in the payment.
-       ///
-       /// This event is provided once there are no further pending HTLCs for the payment and the
-       /// payment is no longer retryable, either due to a several-block timeout or because
-       /// [`ChannelManager::abandon_payment`] was previously called for the corresponding payment.
-       ///
-       /// [`ChannelManager::abandon_payment`]: crate::ln::channelmanager::ChannelManager::abandon_payment
-       PaymentFailed {
-               /// The id returned by [`ChannelManager::send_payment`] and used with
-               /// [`ChannelManager::retry_payment`] and [`ChannelManager::abandon_payment`].
-               ///
-               /// [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
-               /// [`ChannelManager::retry_payment`]: crate::ln::channelmanager::ChannelManager::retry_payment
-               /// [`ChannelManager::abandon_payment`]: crate::ln::channelmanager::ChannelManager::abandon_payment
-               payment_id: PaymentId,
-               /// The hash that was given to [`ChannelManager::send_payment`].
-               ///
-               /// [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
-               payment_hash: PaymentHash,
-       },
        /// Used to indicate that [`ChannelManager::process_pending_htlc_forwards`] should be called at
        /// a time in the future.
        ///
@@ -342,6 +363,9 @@ pub enum Event {
        /// This event is generated when a payment has been successfully forwarded through us and a
        /// forwarding fee earned.
        PaymentForwarded {
+               /// The channel between the source node and us. Optional because versions prior to 0.0.107
+               /// do not serialize this field.
+               source_channel_id: Option<[u8; 32]>,
                /// The fee, in milli-satoshis, which was earned as a result of the payment.
                ///
                /// Note that if we force-closed the channel over which we forwarded an HTLC while the HTLC
@@ -386,26 +410,6 @@ pub enum Event {
                /// The full transaction received from the user
                transaction: Transaction
        },
-       /// Indicates that a path for an outbound payment was successful.
-       ///
-       /// Always generated after [`Event::PaymentSent`] and thus useful for scoring channels. See
-       /// [`Event::PaymentSent`] for obtaining the payment preimage.
-       PaymentPathSuccessful {
-               /// The id returned by [`ChannelManager::send_payment`] and used with
-               /// [`ChannelManager::retry_payment`].
-               ///
-               /// [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
-               /// [`ChannelManager::retry_payment`]: crate::ln::channelmanager::ChannelManager::retry_payment
-               payment_id: PaymentId,
-               /// The hash that was given to [`ChannelManager::send_payment`].
-               ///
-               /// [`ChannelManager::send_payment`]: crate::ln::channelmanager::ChannelManager::send_payment
-               payment_hash: Option<PaymentHash>,
-               /// The payment path that was successful.
-               ///
-               /// May contain a closed channel if the HTLC sent along the path was fulfilled on chain.
-               path: Vec<RouteHop>,
-       },
        /// Indicates a request to open a new channel by a peer.
        ///
        /// To accept the request, call [`ChannelManager::accept_inbound_channel`]. To reject the
@@ -433,6 +437,16 @@ pub enum Event {
                funding_satoshis: u64,
                /// Our starting balance in the channel if the request is accepted, in milli-satoshi.
                push_msat: u64,
+               /// The features that this channel will operate with. If you reject the channel, a
+               /// well-behaved counterparty may automatically re-attempt the channel with a new set of
+               /// feature flags.
+               ///
+               /// Note that if [`ChannelTypeFeatures::supports_scid_privacy`] returns true on this type,
+               /// the resulting [`ChannelManager`] will not be readable by versions of LDK prior to
+               /// 0.0.106.
+               ///
+               /// [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
+               channel_type: ChannelTypeFeatures,
        },
 }
 
@@ -509,10 +523,11 @@ impl Writeable for Event {
                                        (0, VecWriteWrapper(outputs), required),
                                });
                        },
-                       &Event::PaymentForwarded { fee_earned_msat, claim_from_onchain_tx } => {
+                       &Event::PaymentForwarded { fee_earned_msat, source_channel_id, claim_from_onchain_tx } => {
                                7u8.write(writer)?;
                                write_tlv_fields!(writer, {
                                        (0, fee_earned_msat, option),
+                                       (1, source_channel_id, option),
                                        (2, claim_from_onchain_tx, required),
                                });
                        },
@@ -673,12 +688,14 @@ impl MaybeReadable for Event {
                        7u8 => {
                                let f = || {
                                        let mut fee_earned_msat = None;
+                                       let mut source_channel_id = None;
                                        let mut claim_from_onchain_tx = false;
                                        read_tlv_fields!(reader, {
                                                (0, fee_earned_msat, option),
+                                               (1, source_channel_id, option),
                                                (2, claim_from_onchain_tx, required),
                                        });
-                                       Ok(Some(Event::PaymentForwarded { fee_earned_msat, claim_from_onchain_tx }))
+                                       Ok(Some(Event::PaymentForwarded { fee_earned_msat, source_channel_id, claim_from_onchain_tx }))
                                };
                                f()
                        },