AaronFiore/electrum
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lnonion: explicitly forbid nesting trampoline-in-trampoline

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This assert is needed because I don't want to reason about
what could happen without it.

We currently use fixed 400 bytes trampoline onion sizes, which would
implicitly prevent this. However the current bolts PR actually specifies
variable size trampoline onions.
This commit is contained in:
SomberNight
2025-11-19 16:28:50 +00:00
parent d15598bcf0
commit ecd1b7ade8
1 changed files with 2 additions and 0 deletions
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2
electrum/lnonion.py
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@@ -396,6 +396,8 @@ def process_onion_packet(
# trampoline
trampoline_onion_packet = hop_data.payload.get('trampoline_onion_packet')
if trampoline_onion_packet:
if is_trampoline:
raise Exception("found nested trampoline inside trampoline")
top_version = trampoline_onion_packet.get('version')
top_public_key = trampoline_onion_packet.get('public_key')
top_hops_data = trampoline_onion_packet.get('hops_data')