Minor BlindedHop docs update

[rust-lightning] / lightning / src / blinded_path / utils.rs

diff --git a/lightning/src/blinded_path/utils.rs b/lightning/src/blinded_path/utils.rs
index a188274a5d2fccd0b2eeee67c77c16530c53e1aa..1ac6519452c1eb10af3757240d41a046d381efaa 100644 (file)
--- a/lightning/src/blinded_path/utils.rs
+++ b/lightning/src/blinded_path/utils.rs
@@ -27,11 +27,15 @@ use crate::prelude::*;
 
 // TODO: DRY with onion_utils::construct_onion_keys_callback
 #[inline]
-pub(crate) fn construct_keys_callback<T: secp256k1::Signing + secp256k1::Verification,
-       FType: FnMut(PublicKey, SharedSecret, PublicKey, [u8; 32], Option<PublicKey>, Option<Vec<u8>>)>(
-       secp_ctx: &Secp256k1<T>, unblinded_path: &[PublicKey], destination: Option<Destination>,
-       session_priv: &SecretKey, mut callback: FType
-) -> Result<(), secp256k1::Error> {
+pub(crate) fn construct_keys_callback<'a, T, I, F>(
+       secp_ctx: &Secp256k1<T>, unblinded_path: I, destination: Option<Destination>,
+       session_priv: &SecretKey, mut callback: F
+) -> Result<(), secp256k1::Error>
+where
+       T: secp256k1::Signing + secp256k1::Verification,
+       I: Iterator<Item=&'a PublicKey>,
+       F: FnMut(PublicKey, SharedSecret, PublicKey, [u8; 32], Option<PublicKey>, Option<Vec<u8>>),
+{
        let mut msg_blinding_point_priv = session_priv.clone();
        let mut msg_blinding_point = PublicKey::from_secret_key(secp_ctx, &msg_blinding_point_priv);
        let mut onion_packet_pubkey_priv = msg_blinding_point_priv.clone();