Trampoline onion construction.

[rust-lightning] / lightning / src / ln / onion_utils.rs

diff --git a/lightning/src/ln/onion_utils.rs b/lightning/src/ln/onion_utils.rs
index 53ef0729aa171ba56ff33ba73a55cb4ed922df83..74de4a923577269bedce2a4dccb1821d307f76b6 100644 (file)
--- a/lightning/src/ln/onion_utils.rs
+++ b/lightning/src/ln/onion_utils.rs
@@ -291,6 +291,24 @@ pub(super) fn construct_onion_packet(
        )
 }
 
+#[allow(unused)]
+pub(super) fn construct_trampoline_onion_packet(
+       payloads: Vec<msgs::OutboundTrampolinePayload>, onion_keys: Vec<OnionKeys>,
+       prng_seed: [u8; 32], associated_data: &PaymentHash, length: u16,
+) -> Result<msgs::TrampolineOnionPacket, ()> {
+       let mut packet_data = vec![0u8; length as usize];
+
+       let mut chacha = ChaCha20::new(&prng_seed, &[0; 8]);
+       chacha.process(&vec![0u8; length as usize], &mut packet_data);
+
+       construct_onion_packet_with_init_noise::<_, _>(
+               payloads,
+               onion_keys,
+               packet_data,
+               Some(associated_data),
+       )
+}
+
 #[cfg(test)]
 /// Used in testing to write bogus `BogusOnionHopData` as well as `RawOnionHopData`, which is
 /// otherwise not representable in `msgs::OnionHopData`.