AaronFiore/electrum
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use option varonion: actually use TLV payloads, and signal support

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This commit is contained in:
SomberNight
2020-03-24 17:25:49 +01:00
parent 4b78bf94d4
commit 30bf32b34b
5 changed files with 64 additions and 28 deletions
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13
electrum/lnonion.py
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@@ -161,6 +161,9 @@ class OnionHopsDataSingle: # called HopData in lnd
assert len(ret.hmac) == PER_HOP_HMAC_SIZE
return ret
def __repr__(self):
return f"<OnionHopsDataSingle. is_tlv_payload={self.is_tlv_payload}. payload={self.payload}. hmac={self.hmac}>"
class OnionPacket:
@@ -265,22 +268,24 @@ def calc_hops_data_for_payment(route: 'LNPaymentRoute', amount_msat: int, final_
if len(route) > NUM_MAX_EDGES_IN_PAYMENT_PATH:
raise PaymentFailure(f"too long route ({len(route)} edges)")
# payload that will be seen by the last hop:
amt = amount_msat
cltv = final_cltv
hop_payload = {
"amt_to_forward": {"amt_to_forward": amt},
"outgoing_cltv_value": {"outgoing_cltv_value": cltv},
"short_channel_id": {"short_channel_id": b"\x00" * 8}, # TODO omit if tlv
}
hops_data = [OnionHopsDataSingle(is_tlv_payload=False, # TODO
hops_data = [OnionHopsDataSingle(is_tlv_payload=route[-1].has_feature_varonion(),
payload=hop_payload)]
for route_edge in reversed(route[1:]):
# payloads, backwards from last hop (but excluding the first edge):
for edge_index in range(len(route) - 1, 0, -1):
route_edge = route[edge_index]
hop_payload = {
"amt_to_forward": {"amt_to_forward": amt},
"outgoing_cltv_value": {"outgoing_cltv_value": cltv},
"short_channel_id": {"short_channel_id": route_edge.short_channel_id},
}
hops_data += [OnionHopsDataSingle(is_tlv_payload=False, # TODO
hops_data += [OnionHopsDataSingle(is_tlv_payload=route[edge_index-1].has_feature_varonion(),
payload=hop_payload)]
amt += route_edge.fee_for_edge(amt)
cltv += route_edge.cltv_expiry_delta