Merge pull request lightningdevkit#2039 from jkczyz/2023-02-offer-flow

BOLT 12 Offers message flow

Author: TheBlueMatt

lightning/src/blinded_path/mod.rs

@@ -84,7 +84,7 @@ impl BlindedPath {
 	}
 
 	/// Create a one-hop blinded path for a payment.
-	pub fn one_hop_for_payment<ES: EntropySource, T: secp256k1::Signing + secp256k1::Verification>(
+	pub fn one_hop_for_payment<ES: EntropySource + ?Sized, T: secp256k1::Signing + secp256k1::Verification>(
 		payee_node_id: PublicKey, payee_tlvs: payment::ReceiveTlvs, entropy_source: &ES,
 		secp_ctx: &Secp256k1<T>
 	) -> Result<(BlindedPayInfo, Self), ()> {
@@ -105,7 +105,7 @@ impl BlindedPath {
 	///
 	/// [`ForwardTlvs`]: crate::blinded_path::payment::ForwardTlvs
 	//  TODO: make all payloads the same size with padding + add dummy hops
-	pub(crate) fn new_for_payment<ES: EntropySource, T: secp256k1::Signing + secp256k1::Verification>(
+	pub(crate) fn new_for_payment<ES: EntropySource + ?Sized, T: secp256k1::Signing + secp256k1::Verification>(
 		intermediate_nodes: &[payment::ForwardNode], payee_node_id: PublicKey,
 		payee_tlvs: payment::ReceiveTlvs, htlc_maximum_msat: u64, entropy_source: &ES,
 		secp_ctx: &Secp256k1<T>

lightning/src/blinded_path/payment.rs

@@ -89,8 +89,7 @@ pub struct PaymentRelay {
 /// [`BlindedHop`]: crate::blinded_path::BlindedHop
 #[derive(Clone, Debug)]
 pub struct PaymentConstraints {
-	/// The maximum total CLTV delta that is acceptable when relaying a payment over this
-	/// [`BlindedHop`].
+	/// The maximum total CLTV that is acceptable when relaying a payment over this [`BlindedHop`].
 	pub max_cltv_expiry: u32,
 	/// The minimum value, in msat, that may be accepted by the node corresponding to this
 	/// [`BlindedHop`].

lightning/src/events/mod.rs

@@ -514,10 +514,13 @@ pub enum Event {
 		sender_intended_total_msat: Option<u64>,
 	},
 	/// 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
-	#[cfg(invreqfailed)]
+	/// [`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,
@@ -1164,7 +1167,6 @@ impl Writeable for Event {
 					(8, funding_txo, required),
 				});
 			},
-			#[cfg(invreqfailed)]
 			&Event::InvoiceRequestFailed { ref payment_id } => {
 				33u8.write(writer)?;
 				write_tlv_fields!(writer, {
@@ -1558,7 +1560,6 @@ impl MaybeReadable for Event {
 				};
 				f()
 			},
-			#[cfg(invreqfailed)]
 			33u8 => {
 				let f = || {
 					_init_and_read_len_prefixed_tlv_fields!(reader, {

lightning/src/ln/blinded_payment_tests.rs

@@ -13,7 +13,6 @@ use crate::blinded_path::payment::{PaymentConstraints, ReceiveTlvs};
 use crate::events::MessageSendEventsProvider;
 use crate::ln::channelmanager;
 use crate::ln::channelmanager::{PaymentId, RecipientOnionFields};
-use crate::ln::features::Bolt12InvoiceFeatures;
 use crate::ln::functional_test_utils::*;
 use crate::ln::outbound_payment::Retry;
 use crate::prelude::*;
@@ -88,11 +87,10 @@ fn mpp_to_one_hop_blinded_path() {
 		nodes[3].node.get_our_node_id(), payee_tlvs, &chanmon_cfgs[3].keys_manager, &secp_ctx
 	).unwrap();
 
-	let bolt12_features: Bolt12InvoiceFeatures =
-		channelmanager::provided_invoice_features(&UserConfig::default()).to_context();
+	let bolt12_features =
+		channelmanager::provided_bolt12_invoice_features(&UserConfig::default());
 	let route_params = RouteParameters::from_payment_params_and_value(
-		PaymentParameters::blinded(vec![blinded_path])
-			.with_bolt12_features(bolt12_features).unwrap(),
+		PaymentParameters::blinded(vec![blinded_path]).with_bolt12_features(bolt12_features).unwrap(),
 		amt_msat,
 	);
 	nodes[0].node.send_payment(payment_hash, RecipientOnionFields::spontaneous_empty(), PaymentId(payment_hash.0), route_params, Retry::Attempts(0)).unwrap();