Test blinded Trampoline payload serialization.

Author: arik-so

lightning/src/ln/msgs.rs

@@ -3326,7 +3326,7 @@ mod tests {
 	use crate::ln::types::ChannelId;
 	use crate::types::payment::{PaymentPreimage, PaymentHash, PaymentSecret};
 	use crate::types::features::{ChannelFeatures, ChannelTypeFeatures, InitFeatures, NodeFeatures};
-	use crate::ln::msgs::{self, FinalOnionHopData, OnionErrorPacket, CommonOpenChannelFields, CommonAcceptChannelFields, TrampolineOnionPacket};
+	use crate::ln::msgs::{self, FinalOnionHopData, OnionErrorPacket, CommonOpenChannelFields, CommonAcceptChannelFields, OutboundTrampolinePayload, TrampolineOnionPacket};
 	use crate::ln::msgs::SocketAddress;
 	use crate::routing::gossip::{NodeAlias, NodeId};
 	use crate::util::ser::{BigSize, FixedLengthReader, Hostname, LengthReadable, Readable, ReadableArgs, TransactionU16LenLimited, Writeable};
@@ -3352,6 +3352,8 @@ mod tests {
 
 	#[cfg(feature = "std")]
 	use std::net::{Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6, ToSocketAddrs};
+	use types::features::{BlindedHopFeatures, Bolt12InvoiceFeatures};
+	use crate::blinded_path::payment::{BlindedPayInfo, BlindedPaymentPath};
 	#[cfg(feature = "std")]
 	use crate::ln::msgs::SocketAddressParseError;
 
@@ -4699,6 +4701,36 @@ mod tests {
 		assert_eq!(encoded_trampoline_packet, expected_eclair_trampoline_packet);
 	}
 
+	#[test]
+	fn encoding_outbound_trampoline_payload() {
+		let mut trampoline_features = Bolt12InvoiceFeatures::empty();
+		trampoline_features.set_basic_mpp_optional();
+		let introduction_node = PublicKey::from_slice(&<Vec<u8>>::from_hex("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()).unwrap();
+		let blinding_point = PublicKey::from_slice(&<Vec<u8>>::from_hex("02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619").unwrap()).unwrap();
+		let trampoline_payload = OutboundTrampolinePayload::LegacyBlindedPathEntry {
+			amt_to_forward: 150_000_000,
+			outgoing_cltv_value: 800_000,
+			payment_paths: vec![
+				BlindedPaymentPath::from_raw(
+					introduction_node,
+					blinding_point,
+					vec![],
+					BlindedPayInfo{
+						fee_base_msat: 500,
+						fee_proportional_millionths: 1_000,
+						cltv_expiry_delta: 36,
+						htlc_minimum_msat: 1,
+						htlc_maximum_msat: 500_000_000,
+						features: BlindedHopFeatures::empty(),
+					}
+				)
+			],
+			invoice_features: Some(trampoline_features),
+		};
+		let serialized_payload = trampoline_payload.encode().to_lower_hex_string();
+		assert_eq!(serialized_payload, "71020408f0d18004030c35001503020000165f032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e66868099102eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f28368661900000001f4000003e800240000000000000001000000001dcd65000000");
+	}
+
 	#[test]
 	fn query_channel_range_end_blocknum() {
 		let tests: Vec<(u32, u32, u32)> = vec![