trampoline MPP: handle direct payment to trampoline node

electrum/lnworker.py

@@ -1673,6 +1673,14 @@ class LNWallet(LNWorker):
                         routes = []
                         for trampoline_node_id, trampoline_parts in per_trampoline_channel_amounts.items():
                             per_trampoline_amount = sum([x[1] for x in trampoline_parts])
+                            if trampoline_node_id == invoice_pubkey:
+                                trampoline_route = None
+                                trampoline_onion = None
+                                per_trampoline_secret = payment_secret
+                                per_trampoline_amount_with_fees = amount_msat
+                                per_trampoline_cltv_delta = min_cltv_expiry
+                                per_trampoline_fees = 0
+                            else:
                                 trampoline_route, trampoline_onion, per_trampoline_amount_with_fees, per_trampoline_cltv_delta = create_trampoline_route_and_onion(
                                     amount_msat=per_trampoline_amount,
                                     total_msat=final_total_msat,