AaronFiore/electrum
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onion_message: fix handling of ONION_MESSAGE_LARGE_SIZE payload sizes for onion messages,

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process dummy hops regardless of EXPERIMENTAL_LN_FORWARD_PAYMENTS config option.
This commit is contained in:
Sander van Grieken
2025-11-10 16:20:15 +01:00
parent 3cb639f9b4
commit 1ad6607405
3 changed files with 12 additions and 6 deletions
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3
electrum/lnonion.py
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@@ -359,6 +359,7 @@ def process_onion_packet(
*,
associated_data: bytes = b'',
is_trampoline=False,
is_onion_message=False,
tlv_stream_name='payload') -> ProcessedOnionPacket:
# TODO: check Onion features ( PERM|NODE|3 (required_node_feature_missing )
if onion_packet.version != 0:
@@ -376,6 +377,8 @@ def process_onion_packet(
# peel an onion layer off
rho_key = get_bolt04_onion_key(b'rho', shared_secret)
data_size = TRAMPOLINE_HOPS_DATA_SIZE if is_trampoline else HOPS_DATA_SIZE
if is_onion_message and len(onion_packet.hops_data) > HOPS_DATA_SIZE:
data_size = ONION_MESSAGE_LARGE_SIZE
stream_bytes = generate_cipher_stream(rho_key, 2 * data_size)
padded_header = onion_packet.hops_data + bytes(data_size)
next_hops_data = xor_bytes(padded_header, stream_bytes)