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Fix sender is the introduction node onion messages

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DefaultMessageRouter will form an OnionMessagePath from a BlindedPath
where the sender is the introduction node but only if the sender is
announced. If the sender is unannounced, then DefaultMessageRouter will
fail. While DefaultMessageRouter will only create a blinded path with an
announced introduction node, it may receive one where the introduction
node is unannounced. Don't return an error in this case, as the
OnionMessenger can advance the blinded path by one hop.

This may occur when two nodes have an unannounced channel and one (the
offer creator) wants to use it for payments without an intermediary node
and without putting its node id in the offer.
This commit is contained in:
Jeffrey Czyz 2024-03-19 16:04:43 -05:00
parent dc627b371f
commit f2b84e05e8
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1 changed files with 2 additions and 2 deletions
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4
lightning/src/onion_message/messenger.rs
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@ -318,10 +318,10 @@ where
ES::Target: EntropySource,
{
fn find_path(
&self, _sender: PublicKey, peers: Vec<PublicKey>, destination: Destination
&self, sender: PublicKey, peers: Vec<PublicKey>, destination: Destination
) -> Result<OnionMessagePath, ()> {
let first_node = destination.first_node();
if peers.contains(&first_node) {
if peers.contains(&first_node) || sender == first_node {
Ok(OnionMessagePath {
intermediate_nodes: vec![], destination, first_node_addresses: None
})