From 97c1d656ee3a84a276aeb956a41c40cbd2c68af9 Mon Sep 17 00:00:00 2001
From: Jeffrey Czyz <jkczyz@gmail.com>
Date: Wed, 22 May 2024 11:28:31 -0500
Subject: [PATCH] Add pays_bolt12_invoice_asynchronously test

---
 lightning/src/ln/offers_tests.rs | 87 +++++++++++++++++++++++++++++++-
 1 file changed, 86 insertions(+), 1 deletion(-)

diff --git a/lightning/src/ln/offers_tests.rs b/lightning/src/ln/offers_tests.rs
index c7fb5f8fd..eca43afee 100644
--- a/lightning/src/ln/offers_tests.rs
+++ b/lightning/src/ln/offers_tests.rs
@@ -46,9 +46,10 @@ use core::time::Duration;
 use crate::blinded_path::{BlindedPath, IntroductionNode};
 use crate::blinded_path::payment::{Bolt12OfferContext, Bolt12RefundContext, PaymentContext};
 use crate::events::{Event, MessageSendEventsProvider, PaymentPurpose};
-use crate::ln::channelmanager::{MAX_SHORT_LIVED_RELATIVE_EXPIRY, PaymentId, RecentPaymentDetails, Retry, self};
+use crate::ln::channelmanager::{Bolt12PaymentError, MAX_SHORT_LIVED_RELATIVE_EXPIRY, PaymentId, RecentPaymentDetails, Retry, self};
 use crate::ln::functional_test_utils::*;
 use crate::ln::msgs::{ChannelMessageHandler, Init, NodeAnnouncement, OnionMessage, OnionMessageHandler, RoutingMessageHandler, SocketAddress, UnsignedGossipMessage, UnsignedNodeAnnouncement};
+use crate::ln::outbound_payment::IDEMPOTENCY_TIMEOUT_TICKS;
 use crate::offers::invoice::Bolt12Invoice;
 use crate::offers::invoice_error::InvoiceError;
 use crate::offers::invoice_request::{InvoiceRequest, InvoiceRequestFields};
@@ -865,6 +866,90 @@ fn pays_for_refund_without_blinded_paths() {
 	expect_recent_payment!(bob, RecentPaymentDetails::Fulfilled, payment_id);
 }
 
+/// Checks that a deferred invoice can be paid asynchronously from an Event::InvoiceReceived.
+#[test]
+fn pays_bolt12_invoice_asynchronously() {
+	let mut manually_pay_cfg = test_default_channel_config();
+	manually_pay_cfg.manually_handle_bolt12_invoices = true;
+
+	let chanmon_cfgs = create_chanmon_cfgs(2);
+	let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
+	let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, Some(manually_pay_cfg)]);
+	let nodes = create_network(2, &node_cfgs, &node_chanmgrs);
+
+	create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 10_000_000, 1_000_000_000);
+
+	let alice = &nodes[0];
+	let alice_id = alice.node.get_our_node_id();
+	let bob = &nodes[1];
+	let bob_id = bob.node.get_our_node_id();
+
+	let offer = alice.node
+		.create_offer_builder(None).unwrap()
+		.amount_msats(10_000_000)
+		.build().unwrap();
+
+	let payment_id = PaymentId([1; 32]);
+	bob.node.pay_for_offer(&offer, None, None, None, payment_id, Retry::Attempts(0), None).unwrap();
+	expect_recent_payment!(bob, RecentPaymentDetails::AwaitingInvoice, payment_id);
+
+	let onion_message = bob.onion_messenger.next_onion_message_for_peer(alice_id).unwrap();
+	alice.onion_messenger.handle_onion_message(&bob_id, &onion_message);
+
+	let (invoice_request, _) = extract_invoice_request(alice, &onion_message);
+	let payment_context = PaymentContext::Bolt12Offer(Bolt12OfferContext {
+		offer_id: offer.id(),
+		invoice_request: InvoiceRequestFields {
+			payer_id: invoice_request.payer_id(),
+			quantity: None,
+			payer_note_truncated: None,
+		},
+	});
+
+	let onion_message = alice.onion_messenger.next_onion_message_for_peer(bob_id).unwrap();
+	bob.onion_messenger.handle_onion_message(&alice_id, &onion_message);
+
+	let invoice = match get_event!(bob, Event::InvoiceReceived) {
+		Event::InvoiceReceived { payment_id: actual_payment_id, invoice, .. } => {
+			assert_eq!(actual_payment_id, payment_id);
+			invoice
+		},
+		_ => panic!("No Event::InvoiceReceived"),
+	};
+	assert_eq!(invoice.amount_msats(), 10_000_000);
+	assert_ne!(invoice.signing_pubkey(), alice_id);
+	assert!(!invoice.payment_paths().is_empty());
+	for (_, path) in invoice.payment_paths() {
+		assert_eq!(path.introduction_node, IntroductionNode::NodeId(alice_id));
+	}
+
+	assert!(bob.node.send_payment_for_bolt12_invoice(&invoice).is_ok());
+	assert_eq!(
+		bob.node.send_payment_for_bolt12_invoice(&invoice),
+		Err(Bolt12PaymentError::DuplicateInvoice),
+	);
+
+	route_bolt12_payment(bob, &[alice], &invoice);
+	expect_recent_payment!(bob, RecentPaymentDetails::Pending, payment_id);
+
+	claim_bolt12_payment(bob, &[alice], payment_context);
+	expect_recent_payment!(bob, RecentPaymentDetails::Fulfilled, payment_id);
+
+	assert_eq!(
+		bob.node.send_payment_for_bolt12_invoice(&invoice),
+		Err(Bolt12PaymentError::DuplicateInvoice),
+	);
+
+	for _ in 0..=IDEMPOTENCY_TIMEOUT_TICKS {
+		bob.node.timer_tick_occurred();
+	}
+
+	assert_eq!(
+		bob.node.send_payment_for_bolt12_invoice(&invoice),
+		Err(Bolt12PaymentError::UnexpectedInvoice),
+	);
+}
+
 /// Fails creating an offer when a blinded path cannot be created without exposing the node's id.
 #[test]
 fn fails_creating_offer_without_blinded_paths() {
-- 
2.39.5