Merge pull request #9433 from f321x/change_onion_message

Change OnionFailureCode returned when failing trampoline forwarding

Author: ecdsa

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.