X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fonion_message%2Fmessenger.rs;fp=lightning%2Fsrc%2Fonion_message%2Fmessenger.rs;h=7eba3cdd254af6418132fc29bfac3cde59bd2292;hb=39397d4e14ed87e62cf8f313de749b7b5785561e;hp=6f5d9e8a52cfbab42b5818540dc686398dabb20d;hpb=6500c99f29d626c78c7848586a0018453f64fe45;p=rust-lightning

diff --git a/lightning/src/onion_message/messenger.rs b/lightning/src/onion_message/messenger.rs
index 6f5d9e8a..7eba3cdd 100644
--- a/lightning/src/onion_message/messenger.rs
+++ b/lightning/src/onion_message/messenger.rs
@@ -118,6 +118,9 @@ pub enum SendError {
 	/// Because implementations such as Eclair will drop onion messages where the message packet
 	/// exceeds 32834 bytes, we refuse to send messages where the packet exceeds this size.
 	TooBigPacket,
+	/// The provided [`Destination`] was an invalid [`BlindedRoute`], due to having fewer than two
+	/// blinded hops.
+	TooFewBlindedHops,
 }
 
 impl<Signer: Sign, K: Deref, L: Deref> OnionMessenger<Signer, K, L>
@@ -140,6 +143,11 @@ impl<Signer: Sign, K: Deref, L: Deref> OnionMessenger<Signer, K, L>
 	/// Send an empty onion message to `destination`, routing it through `intermediate_nodes`.
 	/// See [`OnionMessenger`] for example usage.
 	pub fn send_onion_message(&self, intermediate_nodes: &[PublicKey], destination: Destination) -> Result<(), SendError> {
+		if let Destination::BlindedRoute(BlindedRoute { ref blinded_hops, .. }) = destination {
+			if blinded_hops.len() < 2 {
+				return Err(SendError::TooFewBlindedHops);
+			}
+		}
 		let blinding_secret_bytes = self.keys_manager.get_secure_random_bytes();
 		let blinding_secret = SecretKey::from_slice(&blinding_secret_bytes[..]).expect("RNG is busted");
 		let (introduction_node_id, blinding_point) = if intermediate_nodes.len() != 0 {