Add SCID types to ChannelDetails

We add the previously-omitted `short_channel_id`, `inbound_scid_alias`,
`outbound_scid_alias` types to `ChannelDetails`.

bindings/ldk_node.udl

@@ -401,6 +401,9 @@ dictionary ChannelDetails {
 	ChannelId channel_id;
 	PublicKey counterparty_node_id;
 	OutPoint? funding_txo;
+	u64? short_channel_id;
+	u64? outbound_scid_alias;
+	u64? inbound_scid_alias;
 	u64 channel_value_sats;
 	u64? unspendable_punishment_reserve;
 	UserChannelId user_channel_id;

src/types.rs

@@ -184,6 +184,39 @@ pub struct ChannelDetails {
 	/// The channel's funding transaction output, if we've negotiated the funding transaction with
 	/// our counterparty already.
 	pub funding_txo: Option<OutPoint>,
+	/// The position of the funding transaction in the chain. None if the funding transaction has
+	/// not yet been confirmed and the channel fully opened.
+	///
+	/// Note that if [`inbound_scid_alias`] is set, it will be used for invoices and inbound
+	/// payments instead of this.
+	///
+	/// For channels with [`confirmations_required`] set to `Some(0)`, [`outbound_scid_alias`] may
+	/// be used in place of this in outbound routes.
+	///
+	/// [`inbound_scid_alias`]: Self::inbound_scid_alias
+	/// [`outbound_scid_alias`]: Self::outbound_scid_alias
+	/// [`confirmations_required`]: Self::confirmations_required
+	pub short_channel_id: Option<u64>,
+	/// An optional [`short_channel_id`] alias for this channel, randomly generated by us and
+	/// usable in place of [`short_channel_id`] to reference the channel in outbound routes when
+	/// the channel has not yet been confirmed (as long as [`confirmations_required`] is
+	/// `Some(0)`).
+	///
+	/// This will be `None` as long as the channel is not available for routing outbound payments.
+	///
+	/// [`short_channel_id`]: Self::short_channel_id
+	/// [`confirmations_required`]: Self::confirmations_required
+	pub outbound_scid_alias: Option<u64>,
+	/// An optional [`short_channel_id`] alias for this channel, randomly generated by our
+	/// counterparty and usable in place of [`short_channel_id`] in invoice route hints. Our
+	/// counterparty will recognize the alias provided here in place of the [`short_channel_id`]
+	/// when they see a payment to be routed to us.
+	///
+	/// Our counterparty may choose to rotate this value at any time, though will always recognize
+	/// previous values for inbound payment forwarding.
+	///
+	/// [`short_channel_id`]: Self::short_channel_id
+	pub inbound_scid_alias: Option<u64>,
 	/// The value, in satoshis, of this channel as it appears in the funding output.
 	pub channel_value_sats: u64,
 	/// The value, in satoshis, that must always be held as a reserve in the channel for us. This
@@ -295,6 +328,9 @@ impl From<LdkChannelDetails> for ChannelDetails {
 			channel_id: value.channel_id,
 			counterparty_node_id: value.counterparty.node_id,
 			funding_txo: value.funding_txo.map(|o| o.into_bitcoin_outpoint()),
+			short_channel_id: value.short_channel_id,
+			outbound_scid_alias: value.outbound_scid_alias,
+			inbound_scid_alias: value.inbound_scid_alias,
 			channel_value_sats: value.channel_value_satoshis,
 			unspendable_punishment_reserve: value.unspendable_punishment_reserve,
 			user_channel_id: UserChannelId(value.user_channel_id),