f Only take the extra fee once, not accumulated, duh

Author: tnull

lightning/src/routing/router.rs

@@ -1267,7 +1267,12 @@ impl<'a> PaymentPath<'a> {
 				cur_hop_transferred_amount_msat += extra_fees_msat;
 				total_fee_paid_msat += extra_fees_msat;
 				cur_hop_fees_msat += extra_fees_msat;
-				extra_contribution_msat += extra_fees_msat;
+
+				// We remember and return the extra fees on the final hop to allow accounting for
+				// them in the path's value contribution.
+				if last_hop {
+					extra_contribution_msat = extra_fees_msat;
+				}
 			}
 
 			if last_hop {