X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fln%2Foutbound_payment.rs;h=e1748dca7f2ac11978035b2b44c4b66f8a2973d0;hb=6ca81ff2bbddaf946251ce9f15cc69526d228ceb;hp=b449e27983ecd09efdc88a90ff22235d0f7d0f67;hpb=ec928d55b480254f2ce3457a5c219ed115fdf9ef;p=rust-lightning

diff --git a/lightning/src/ln/outbound_payment.rs b/lightning/src/ln/outbound_payment.rs
index b449e279..e1748dca 100644
--- a/lightning/src/ln/outbound_payment.rs
+++ b/lightning/src/ln/outbound_payment.rs
@@ -1337,6 +1337,13 @@ impl OutboundPayments {
 					continue 'path_check;
 				}
 			}
+			for (i, hop) in path.hops.iter().enumerate() {
+				// Check for duplicate channel_id in the remaining hops of the path
+				if path.hops.iter().skip(i + 1).any(|other_hop| other_hop.short_channel_id == hop.short_channel_id) {
+					path_errs.push(Err(APIError::InvalidRoute{err: "Path went through the same channel twice".to_owned()}));
+					continue 'path_check;
+				}
+			}
 			total_value += path.final_value_msat();
 			path_errs.push(Ok(()));
 		}