Use byte array to represent SendHTLCId::OutboundRoute::session_priv

Author: wpaulino

lightning/src/ln/channelmanager.rs

@@ -20,6 +20,7 @@
 use bitcoin::blockdata::block::Header;
 use bitcoin::blockdata::transaction::Transaction;
 use bitcoin::blockdata::constants::ChainHash;
+use bitcoin::key::constants::SECRET_KEY_SIZE;
 use bitcoin::network::constants::Network;
 
 use bitcoin::hashes::Hash;
@@ -313,7 +314,7 @@ impl Readable for InterceptId {
 /// Uniquely describes an HTLC by its source. Just the guaranteed-unique subset of [`HTLCSource`].
 pub(crate) enum SentHTLCId {
 	PreviousHopData { short_channel_id: u64, htlc_id: u64 },
-	OutboundRoute { session_priv: SecretKey },
+	OutboundRoute { session_priv: [u8; SECRET_KEY_SIZE] },
 }
 impl SentHTLCId {
 	pub(crate) fn from_source(source: &HTLCSource) -> Self {
@@ -323,7 +324,7 @@ impl SentHTLCId {
 				htlc_id: hop_data.htlc_id,
 			},
 			HTLCSource::OutboundRoute { session_priv, .. } =>
-				Self::OutboundRoute { session_priv: *session_priv },
+				Self::OutboundRoute { session_priv: session_priv.secret_bytes() },
 		}
 	}
 }