Use the pay_for_offer_from_hrn method from LDK upstream

This commit ensures that when using the unified API to send to a HRN, we use pay_for_offer_from_hrn

Author: chuksys

bindings/ldk_node.udl

@@ -201,7 +201,7 @@ interface Bolt12Payment {
 	[Throws=NodeError]
 	PaymentId send([ByRef]Offer offer, u64? quantity, string? payer_note);
 	[Throws=NodeError]
-	PaymentId send_using_amount([ByRef]Offer offer, u64 amount_msat, u64? quantity, string? payer_note);
+	PaymentId send_using_amount([ByRef]Offer offer, u64 amount_msat, u64? quantity, string? payer_note, HumanReadableName? hrn);
 	[Throws=NodeError]
 	Offer receive(u64 amount_msat, [ByRef]string description, u32? expiry_secs, u64? quantity);
 	[Throws=NodeError]
@@ -320,6 +320,7 @@ enum NodeError {
 	"LiquidityFeeTooHigh",
 	"InvalidBlindedPaths",
 	"AsyncPaymentServicesDisabled",
+	"HrnParsingFailed",
 };
 
 dictionary NodeStatus {
@@ -775,6 +776,13 @@ interface Offer {
 	PublicKey? issuer_signing_pubkey();
 };
 
+interface HumanReadableName {
+	[Throws=NodeError, Name=from_encoded]
+	constructor([ByRef] string encoded);
+	string user();
+	string domain();
+};
+
 [Traits=(Debug, Display, Eq)]
 interface Refund {
 	[Throws=NodeError, Name=from_str]

src/error.rs

@@ -124,6 +124,8 @@ pub enum Error {
 	InvalidBlindedPaths,
 	/// Asynchronous payment services are disabled.
 	AsyncPaymentServicesDisabled,
+	/// Parsing a Human-Readable Name has failed.
+	HrnParsingFailed,
 }
 
 impl fmt::Display for Error {
@@ -201,6 +203,9 @@ impl fmt::Display for Error {
 			Self::AsyncPaymentServicesDisabled => {
 				write!(f, "Asynchronous payment services are disabled.")
 			},
+			Self::HrnParsingFailed => {
+				write!(f, "Failed to parse a human-readable name.")
+			},
 		}
 	}
 }

src/ffi/types.rs

@@ -28,6 +28,7 @@ pub use lightning::ln::types::ChannelId;
 pub use lightning::offers::offer::OfferId;
 pub use lightning::routing::gossip::{NodeAlias, NodeId, RoutingFees};
 pub use lightning::routing::router::RouteParametersConfig;
+pub use lightning::onion_message::dns_resolution::HumanReadableName as LdkHumanReadableName;
 pub use lightning_types::string::UntrustedString;
 
 pub use lightning_types::payment::{PaymentHash, PaymentPreimage, PaymentSecret};
@@ -278,6 +279,58 @@ impl std::fmt::Display for Offer {
 	}
 }
 
+pub struct HumanReadableName {
+	pub(crate) inner: LdkHumanReadableName,
+}
+
+impl HumanReadableName {
+	pub fn into_inner(&self) -> LdkHumanReadableName {
+		self.inner.clone()
+	}
+
+	pub fn from_encoded(encoded: &str) -> Result<Self, Error> {
+		let hrn = match LdkHumanReadableName::from_encoded(encoded) {
+			Ok(hrn) => Ok(hrn),
+			Err(_) => Err(Error::HrnParsingFailed),
+		}?;
+
+		Ok(Self { inner: hrn })
+	}
+
+	pub fn user(&self) -> String {
+		self.inner.user().to_string()
+	}
+
+	pub fn domain(&self) -> String {
+		self.inner.domain().to_string()
+	}
+}
+
+impl From<LdkHumanReadableName> for HumanReadableName {
+	fn from(ldk_hrn: LdkHumanReadableName) -> Self {
+		HumanReadableName { inner: ldk_hrn }
+	}
+}
+
+impl From<HumanReadableName> for LdkHumanReadableName {
+	fn from(wrapper: HumanReadableName) -> Self {
+		wrapper.into_inner()
+	}
+}
+
+impl Deref for HumanReadableName {
+	type Target = LdkHumanReadableName;
+	fn deref(&self) -> &Self::Target {
+		&self.inner
+	}
+}
+
+impl AsRef<LdkHumanReadableName> for HumanReadableName {
+	fn as_ref(&self) -> &LdkHumanReadableName {
+		self.deref()
+	}
+}
+
 /// A `Refund` is a request to send an [`Bolt12Invoice`] without a preceding [`Offer`].
 ///
 /// Typically, after an invoice is paid, the recipient may publish a refund allowing the sender to

src/payment/bolt12.rs

@@ -18,7 +18,7 @@ use crate::types::{ChannelManager, PaymentStore};
 
 use lightning::blinded_path::message::BlindedMessagePath;
 use lightning::ln::channelmanager::{OptionalOfferPaymentParams, PaymentId, Retry};
-use lightning::offers::offer::{Amount, Offer as LdkOffer, Quantity};
+use lightning::offers::offer::{Amount, Offer as LdkOffer, OfferFromHrn, Quantity};
 use lightning::offers::parse::Bolt12SemanticError;
 use lightning::routing::router::RouteParametersConfig;
 
@@ -47,6 +47,11 @@ type Refund = lightning::offers::refund::Refund;
 #[cfg(feature = "uniffi")]
 type Refund = Arc<crate::ffi::Refund>;
 
+#[cfg(not(feature = "uniffi"))]
+type HumanReadableName = lightning::onion_message::dns_resolution::HumanReadableName;
+#[cfg(feature = "uniffi")]
+type HumanReadableName = Arc<crate::ffi::HumanReadableName>;
+
 /// A payment handler allowing to create and pay [BOLT 12] offers and refunds.
 ///
 /// Should be retrieved by calling [`Node::bolt12_payment`].
@@ -184,6 +189,7 @@ impl Bolt12Payment {
 	/// response.
 	pub fn send_using_amount(
 		&self, offer: &Offer, amount_msat: u64, quantity: Option<u64>, payer_note: Option<String>,
+		hrn: Option<HumanReadableName>,
 	) -> Result<PaymentId, Error> {
 		if !*self.is_running.read().unwrap() {
 			return Err(Error::NotRunning);
@@ -218,7 +224,11 @@ impl Bolt12Payment {
 			retry_strategy,
 			route_params_config,
 		};
-		let res = if let Some(quantity) = quantity {
+		let res = if let Some(hrn) = hrn {
+			let hrn = maybe_deref(&hrn);
+			let offer = OfferFromHrn { offer: offer.clone(), hrn: *hrn };
+			self.channel_manager.pay_for_offer_from_hrn(&offer, amount_msat, payment_id, params)
+		} else if let Some(quantity) = quantity {
 			self.channel_manager.pay_for_offer_with_quantity(
 				&offer,
 				Some(amount_msat),

src/payment/unified.rs

@@ -23,6 +23,7 @@ use crate::Config;
 
 use lightning::ln::channelmanager::PaymentId;
 use lightning::offers::offer::Offer;
+use lightning::onion_message::dns_resolution::HumanReadableName;
 use lightning_invoice::{Bolt11Invoice, Bolt11InvoiceDescription, Description};
 
 use bip21::de::ParamKind;
@@ -199,8 +200,12 @@ impl UnifiedPayment {
 			resolved.methods().iter().find(|m| matches!(m, PaymentMethod::LightningBolt12(_)))
 		{
 			let offer = maybe_wrap(offer.clone());
-			let payment_result = if let Some(amount_msat) = amount_msat {
-				self.bolt12_payment.send_using_amount(&offer, amount_msat, None, None)
+			
+			let payment_result = if let Ok(hrn) = HumanReadableName::from_encoded(uri_str) {
+				let hrn = maybe_wrap(hrn.clone());
+				self.bolt12_payment.send_using_amount(&offer, amount_msat.unwrap_or(0), None, None, Some(hrn))
+			} else if let Some(amount_msat) = amount_msat {
+				self.bolt12_payment.send_using_amount(&offer, amount_msat, None, None, None)
 			} else {
 				self.bolt12_payment.send(&offer, None, None)
 			}