From c921100de3bd5748965e7b4e58526e99548583d0 Mon Sep 17 00:00:00 2001
From: f321x <felb@tuta.io>
Date: Wed, 15 Jan 2025 13:18:11 +0100
Subject: [PATCH] return TRAMPOLINE_FEE_INSUFFICIENT instead of
 UNKNOWN_NEXT_PEER on payment failure in forwarding

---
 electrum/lnpeer.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/electrum/lnpeer.py b/electrum/lnpeer.py
index 0c094e1f751..6ac0fc96535 100644
--- a/electrum/lnpeer.py
+++ b/electrum/lnpeer.py
@@ -2016,7 +2016,7 @@ async def maybe_forward_trampoline(
             self.logger.debug(
                 f"maybe_forward_trampoline. PaymentFailure for {payment_hash.hex()=}, {payment_secret.hex()=}: {e!r}")
             # FIXME: adapt the error code
-            raise OnionRoutingFailure(code=OnionFailureCode.UNKNOWN_NEXT_PEER, data=b'')
+            raise OnionRoutingFailure(code=OnionFailureCode.TRAMPOLINE_FEE_INSUFFICIENT, data=b'')
 
     def _maybe_refuse_to_forward_htlc_that_corresponds_to_payreq_we_created(self, payment_hash: bytes) -> bool:
         """Returns True if the HTLC should be failed.