AaronFiore/electrum
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Trampoline routing:

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- add support for trampoline forwarding
 - add regtest with trampoline payment
This commit is contained in:
ThomasV
2021-02-09 15:09:27 +01:00
parent ded449233e
commit cf818fe08c
5 changed files with 166 additions and 16 deletions
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22
electrum/lnworker.py
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@@ -660,6 +660,8 @@ class LNWallet(LNWorker):
for payment_hash in self.get_payments(status='inflight').keys():
self.set_invoice_status(payment_hash.hex(), PR_INFLIGHT)
self.trampoline_forwarding_failures = {} # todo: should be persisted
@property
def channels(self) -> Mapping[bytes, Channel]:
"""Returns a read-only copy of channels."""
@@ -1063,8 +1065,16 @@ class LNWallet(LNWorker):
async def pay_to_node(
self, node_pubkey, payment_hash, payment_secret, amount_to_pay,
min_cltv_expiry, r_tags, t_tags, invoice_features, *, attempts: int = 1,
full_path: LNPaymentPath = None):
min_cltv_expiry, r_tags, t_tags, invoice_features, *,
attempts: int = 1, full_path: LNPaymentPath=None,
trampoline_onion=None, trampoline_fee=None, trampoline_cltv_delta=None):
if trampoline_onion:
# todo: compare to the fee of the actual route we found
if trampoline_fee < 1000:
raise OnionRoutingFailure(code=OnionFailureCode.TRAMPOLINE_FEE_INSUFFICIENT, data=b'')
if trampoline_cltv_delta < 576:
raise OnionRoutingFailure(code=OnionFailureCode.TRAMPOLINE_EXPIRY_TOO_SOON, data=b'')
self.logs[payment_hash.hex()] = log = []
amount_inflight = 0 # what we sent in htlcs
@@ -1084,7 +1094,7 @@ class LNWallet(LNWorker):
routes = [(route, amount_to_send)]
# 2. send htlcs
for route, amount_msat in routes:
await self.pay_to_route(route, amount_msat, payment_hash, payment_secret, min_cltv_expiry)
await self.pay_to_route(route, amount_msat, payment_hash, payment_secret, min_cltv_expiry, trampoline_onion)
amount_inflight += amount_msat
util.trigger_callback('invoice_status', self.wallet, payment_hash.hex())
# 3. await a queue
@@ -1101,7 +1111,7 @@ class LNWallet(LNWorker):
self.handle_error_code_from_failed_htlc(htlc_log)
async def pay_to_route(self, route: LNPaymentRoute, amount_msat:int, payment_hash:bytes, payment_secret:bytes, min_cltv_expiry:int):
async def pay_to_route(self, route: LNPaymentRoute, amount_msat:int, payment_hash:bytes, payment_secret:bytes, min_cltv_expiry:int, trampoline_onion:bytes =None):
# send a single htlc
short_channel_id = route[0].short_channel_id
chan = self.get_channel_by_short_id(short_channel_id)
@@ -1115,7 +1125,8 @@ class LNWallet(LNWorker):
amount_msat=amount_msat,
payment_hash=payment_hash,
min_final_cltv_expiry=min_cltv_expiry,
payment_secret=payment_secret)
payment_secret=payment_secret,
fwd_trampoline_onion=trampoline_onion)
self.htlc_routes[(payment_hash, short_channel_id, htlc.htlc_id)] = route
util.trigger_callback('htlc_added', chan, htlc, SENT)
@@ -1383,6 +1394,7 @@ class LNWallet(LNWorker):
channels = list(self.channels.values())
scid_to_my_channels = {chan.short_channel_id: chan for chan in channels
if chan.short_channel_id is not None}
blacklist = self.network.channel_blacklist.get_current_list()
for private_route in r_tags:
if len(private_route) == 0: