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06efe25ae7a9643f1f2177d86346ebeb79d6d38e
electrum/tests/test_lnpeer.py
ThomasV 5708f7b1c8 Persist MPP resolution status in wallet file. 
If we accept a MPP and we forward the payment (trampoline or swap),
we need to persist the payment accepted status, or we might wrongly
release htlcs on the next restart.

lnworker.received_mpp_htlcs used to be cleaned up in maybe_cleanup_forwarding,
which only applies to forwarded payments. However, since we now
persist this dict, we need to clean it up also in the case of
payments received by us. This part of maybe_cleanup_forwarding has
been migrated to lnworker.maybe_cleanup_mpp
2024-10-24 11:19:53 +02:00

1973 lines
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Python
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import asyncio
import shutil
import copy
import tempfile
from decimal import Decimal
import os
from contextlib import contextmanager
from collections import defaultdict
import logging
import concurrent
from concurrent import futures
import unittest
from typing import Iterable, NamedTuple, Tuple, List, Dict
from aiorpcx import timeout_after, TaskTimeout
from electrum_ecc import ECPrivkey
import electrum
import electrum.trampoline
from electrum import bitcoin
from electrum import util
from electrum import constants
from electrum.network import Network
from electrum import simple_config, lnutil
from electrum.lnaddr import lnencode, LnAddr, lndecode
from electrum.bitcoin import COIN, sha256
from electrum.transaction import Transaction
from electrum.util import NetworkRetryManager, bfh, OldTaskGroup, EventListener, InvoiceError
from electrum.lnpeer import Peer
from electrum.lntransport import LNPeerAddr
from electrum.crypto import privkey_to_pubkey
from electrum.lnutil import Keypair, PaymentFailure, LnFeatures, HTLCOwner, PaymentFeeBudget
from electrum.lnchannel import ChannelState, PeerState, Channel
from electrum.lnrouter import LNPathFinder, PathEdge, LNPathInconsistent
from electrum.channel_db import ChannelDB
from electrum.lnworker import LNWallet, NoPathFound, SentHtlcInfo, PaySession
from electrum.lnmsg import encode_msg, decode_msg
from electrum import lnmsg
from electrum.logging import console_stderr_handler, Logger
from electrum.lnworker import PaymentInfo, RECEIVED
from electrum.lnonion import OnionFailureCode, OnionRoutingFailure
from electrum.lnutil import UpdateAddHtlc
from electrum.lnutil import LOCAL, REMOTE
from electrum.invoices import PR_PAID, PR_UNPAID
from electrum.interface import GracefulDisconnect
from electrum.simple_config import SimpleConfig
from .test_lnchannel import create_test_channels
from . import ElectrumTestCase
def keypair():
priv = ECPrivkey.generate_random_key().get_secret_bytes()
k1 = Keypair(
pubkey=privkey_to_pubkey(priv),
privkey=priv)
return k1
@contextmanager
def noop_lock():
yield
class MockNetwork:
def __init__(self, tx_queue, *, config: SimpleConfig):
self.callbacks = defaultdict(list)
self.lnwatcher = None
self.interface = None
self.config = config
self.asyncio_loop = util.get_asyncio_loop()
self.channel_db = ChannelDB(self)
self.channel_db.data_loaded.set()
self.path_finder = LNPathFinder(self.channel_db)
self.lngossip = MockLNGossip()
self.tx_queue = tx_queue
self._blockchain = MockBlockchain()
@property
def callback_lock(self):
return noop_lock()
def get_local_height(self):
return self.blockchain().height()
def blockchain(self):
return self._blockchain
async def broadcast_transaction(self, tx):
if self.tx_queue:
await self.tx_queue.put(tx)
async def try_broadcasting(self, tx, name):
await self.broadcast_transaction(tx)
class MockBlockchain:
def height(self):
# Let's return a non-zero, realistic height.
# 0 might hide relative vs abs locktime confusion bugs.
return 600_000
def is_tip_stale(self):
return False
class MockADB:
def add_transaction(self, tx):
pass
class MockWallet:
receive_requests = {}
adb = MockADB()
def get_request(self, key):
pass
def get_key_for_receive_request(self, x):
pass
def set_label(self, x, y):
pass
def save_db(self):
pass
def is_lightning_backup(self):
return False
def is_mine(self, addr):
return True
def get_fingerprint(self):
return ''
class MockLNGossip:
def get_sync_progress_estimate(self):
return None, None, None
class MockLNWallet(Logger, EventListener, NetworkRetryManager[LNPeerAddr]):
MPP_EXPIRY = 2 # HTLC timestamps are cast to int, so this cannot be 1
PAYMENT_TIMEOUT = 120
TIMEOUT_SHUTDOWN_FAIL_PENDING_HTLCS = 0
MPP_SPLIT_PART_FRACTION = 1 # this disables the forced splitting
MPP_SPLIT_PART_MINAMT_MSAT = 5_000_000
def __init__(self, *, local_keypair: Keypair, chans: Iterable['Channel'], tx_queue, name):
self.name = name
Logger.__init__(self)
NetworkRetryManager.__init__(self, max_retry_delay_normal=1, init_retry_delay_normal=1)
self.node_keypair = local_keypair
self.payment_secret_key = os.urandom(32) # does not need to be deterministic in tests
self._user_dir = tempfile.mkdtemp(prefix="electrum-lnpeer-test-")
self.config = SimpleConfig({}, read_user_dir_function=lambda: self._user_dir)
self.network = MockNetwork(tx_queue, config=self.config)
self.taskgroup = OldTaskGroup()
self.lnwatcher = None
self.swap_manager = None
self.listen_server = None
self._channels = {chan.channel_id: chan for chan in chans}
self.payment_info = {}
self.logs = defaultdict(list)
self.wallet = MockWallet()
self.features = LnFeatures(0)
self.features |= LnFeatures.OPTION_DATA_LOSS_PROTECT_OPT
self.features |= LnFeatures.OPTION_UPFRONT_SHUTDOWN_SCRIPT_OPT
self.features |= LnFeatures.VAR_ONION_OPT
self.features |= LnFeatures.PAYMENT_SECRET_OPT
self.features |= LnFeatures.OPTION_TRAMPOLINE_ROUTING_OPT_ELECTRUM
self.features |= LnFeatures.OPTION_CHANNEL_TYPE_OPT
self.features |= LnFeatures.OPTION_SCID_ALIAS_OPT
self.pending_payments = defaultdict(asyncio.Future)
for chan in chans:
chan.lnworker = self
self._peers = {} # bytes -> Peer
# used in tests
self.enable_htlc_settle = True
self.enable_htlc_forwarding = True
self.received_mpp_htlcs = dict()
self._paysessions = dict()
self.sent_htlcs_info = dict()
self.sent_buckets = defaultdict(set)
self.active_forwardings = {}
self.forwarding_failures = {}
self.inflight_payments = set()
self.preimages = {}
self.stopping_soon = False
self.downstream_to_upstream_htlc = {}
self.hold_invoice_callbacks = {}
self.payment_bundles = [] # lists of hashes. todo:persist
self.config.INITIAL_TRAMPOLINE_FEE_LEVEL = 0
self.logger.info(f"created LNWallet[{name}] with nodeID={local_keypair.pubkey.hex()}")
def clear_invoices_cache(self):
pass
def pay_scheduled_invoices(self):
pass
def get_invoice_status(self, key):
pass
@property
def lock(self):
return noop_lock()
@property
def channel_db(self):
return self.network.channel_db if self.network else None
def uses_trampoline(self):
return not bool(self.channel_db)
@property
def channels(self):
return self._channels
@property
def peers(self):
return self._peers
def get_channel_by_short_id(self, short_channel_id):
with self.lock:
for chan in self._channels.values():
if chan.short_channel_id == short_channel_id:
return chan
def channel_state_changed(self, chan):
pass
def save_channel(self, chan):
print("Ignoring channel save")
def diagnostic_name(self):
return self.name
async def stop(self):
await LNWallet.stop(self)
if self.channel_db:
self.channel_db.stop()
await self.channel_db.stopped_event.wait()
async def create_routes_from_invoice(self, amount_msat: int, decoded_invoice: LnAddr, *, full_path=None):
paysession = PaySession(
payment_hash=decoded_invoice.paymenthash,
payment_secret=decoded_invoice.payment_secret,
initial_trampoline_fee_level=0,
invoice_features=decoded_invoice.get_features(),
r_tags=decoded_invoice.get_routing_info('r'),
min_final_cltv_delta=decoded_invoice.get_min_final_cltv_delta(),
amount_to_pay=amount_msat,
invoice_pubkey=decoded_invoice.pubkey.serialize(),
uses_trampoline=False,
use_two_trampolines=False,
)
payment_key = decoded_invoice.paymenthash + decoded_invoice.payment_secret
self._paysessions[payment_key] = paysession
return [r async for r in self.create_routes_for_payment(
amount_msat=amount_msat,
paysession=paysession,
full_path=full_path,
budget=PaymentFeeBudget.default(invoice_amount_msat=amount_msat, config=self.config),
)]
get_payments = LNWallet.get_payments
get_payment_secret = LNWallet.get_payment_secret
get_payment_info = LNWallet.get_payment_info
save_payment_info = LNWallet.save_payment_info
set_invoice_status = LNWallet.set_invoice_status
set_request_status = LNWallet.set_request_status
set_payment_status = LNWallet.set_payment_status
get_payment_status = LNWallet.get_payment_status
check_mpp_status = LNWallet.check_mpp_status
htlc_fulfilled = LNWallet.htlc_fulfilled
htlc_failed = LNWallet.htlc_failed
save_preimage = LNWallet.save_preimage
get_preimage = LNWallet.get_preimage
create_route_for_single_htlc = LNWallet.create_route_for_single_htlc
create_routes_for_payment = LNWallet.create_routes_for_payment
_check_invoice = LNWallet._check_invoice
pay_to_route = LNWallet.pay_to_route
pay_to_node = LNWallet.pay_to_node
pay_invoice = LNWallet.pay_invoice
force_close_channel = LNWallet.force_close_channel
schedule_force_closing = LNWallet.schedule_force_closing
get_first_timestamp = lambda self: 0
on_peer_successfully_established = LNWallet.on_peer_successfully_established
get_channel_by_id = LNWallet.get_channel_by_id
channels_for_peer = LNWallet.channels_for_peer
calc_routing_hints_for_invoice = LNWallet.calc_routing_hints_for_invoice
get_channels_for_receiving = LNWallet.get_channels_for_receiving
handle_error_code_from_failed_htlc = LNWallet.handle_error_code_from_failed_htlc
is_trampoline_peer = LNWallet.is_trampoline_peer
wait_for_received_pending_htlcs_to_get_removed = LNWallet.wait_for_received_pending_htlcs_to_get_removed
#on_event_proxy_set = LNWallet.on_event_proxy_set
_decode_channel_update_msg = LNWallet._decode_channel_update_msg
_handle_chanupd_from_failed_htlc = LNWallet._handle_chanupd_from_failed_htlc
is_forwarded_htlc = LNWallet.is_forwarded_htlc
notify_upstream_peer = LNWallet.notify_upstream_peer
_force_close_channel = LNWallet._force_close_channel
suggest_splits = LNWallet.suggest_splits
register_hold_invoice = LNWallet.register_hold_invoice
unregister_hold_invoice = LNWallet.unregister_hold_invoice
add_payment_info_for_hold_invoice = LNWallet.add_payment_info_for_hold_invoice
update_mpp_with_received_htlc = LNWallet.update_mpp_with_received_htlc
set_mpp_resolution = LNWallet.set_mpp_resolution
is_mpp_amount_reached = LNWallet.is_mpp_amount_reached
get_first_timestamp_of_mpp = LNWallet.get_first_timestamp_of_mpp
bundle_payments = LNWallet.bundle_payments
get_payment_bundle = LNWallet.get_payment_bundle
_get_payment_key = LNWallet._get_payment_key
save_forwarding_failure = LNWallet.save_forwarding_failure
get_forwarding_failure = LNWallet.get_forwarding_failure
maybe_cleanup_forwarding = LNWallet.maybe_cleanup_forwarding
current_target_feerate_per_kw = LNWallet.current_target_feerate_per_kw
current_low_feerate_per_kw = LNWallet.current_low_feerate_per_kw
maybe_cleanup_mpp = LNWallet.maybe_cleanup_mpp
class MockTransport:
def __init__(self, name):
self.queue = asyncio.Queue() # incoming messages
self._name = name
self.peer_addr = None
def name(self):
return self._name
async def read_messages(self):
while True:
data = await self.queue.get()
if isinstance(data, asyncio.Event): # to artificially delay messages
await data.wait()
continue
yield data
class NoFeaturesTransport(MockTransport):
"""
This answers the init message with a init that doesn't signal any features.
Used for testing that we require DATA_LOSS_PROTECT.
"""
def send_bytes(self, data):
decoded = decode_msg(data)
print(decoded)
if decoded[0] == 'init':
self.queue.put_nowait(encode_msg('init', lflen=1, gflen=1, localfeatures=b"\x00", globalfeatures=b"\x00"))
class PutIntoOthersQueueTransport(MockTransport):
def __init__(self, keypair, name):
super().__init__(name)
self.other_mock_transport = None
self.privkey = keypair.privkey
def send_bytes(self, data):
self.other_mock_transport.queue.put_nowait(data)
def transport_pair(k1, k2, name1, name2):
t1 = PutIntoOthersQueueTransport(k1, name1)
t2 = PutIntoOthersQueueTransport(k2, name2)
t1.other_mock_transport = t2
t2.other_mock_transport = t1
return t1, t2
class PeerInTests(Peer):
DELAY_INC_MSG_PROCESSING_SLEEP = 0 # disable rate-limiting
high_fee_channel = {
'local_balance_msat': 10 * bitcoin.COIN * 1000 // 2,
'remote_balance_msat': 10 * bitcoin.COIN * 1000 // 2,
'local_base_fee_msat': 500_000,
'local_fee_rate_millionths': 500,
'remote_base_fee_msat': 500_000,
'remote_fee_rate_millionths': 500,
}
low_fee_channel = {
'local_balance_msat': 10 * bitcoin.COIN * 1000 // 2,
'remote_balance_msat': 10 * bitcoin.COIN * 1000 // 2,
'local_base_fee_msat': 1_000,
'local_fee_rate_millionths': 1,
'remote_base_fee_msat': 1_000,
'remote_fee_rate_millionths': 1,
}
depleted_channel = {
'local_balance_msat': 0,
'remote_balance_msat': 10 * bitcoin.COIN * 1000,
'local_base_fee_msat': 1_000,
'local_fee_rate_millionths': 1,
'remote_base_fee_msat': 1_000,
'remote_fee_rate_millionths': 1,
}
_GRAPH_DEFINITIONS = {
'square_graph': {
'alice': {
'channels': {
# we should use copies of channel definitions if
# we want to independently alter them in a test
'bob': high_fee_channel.copy(),
'carol': low_fee_channel.copy(),
},
},
'bob': {
'channels': {
'dave': high_fee_channel.copy(),
},
'config': {
SimpleConfig.EXPERIMENTAL_LN_FORWARD_PAYMENTS: True,
SimpleConfig.EXPERIMENTAL_LN_FORWARD_TRAMPOLINE_PAYMENTS: True,
},
},
'carol': {
'channels': {
'dave': low_fee_channel.copy(),
},
'config': {
SimpleConfig.EXPERIMENTAL_LN_FORWARD_PAYMENTS: True,
SimpleConfig.EXPERIMENTAL_LN_FORWARD_TRAMPOLINE_PAYMENTS: True,
},
},
'dave': {
},
}
}
class Graph(NamedTuple):
workers: Dict[str, MockLNWallet]
peers: Dict[Tuple[str, str], Peer]
channels: Dict[Tuple[str, str], Channel]
class PaymentDone(Exception): pass
class PaymentTimeout(Exception): pass
class SuccessfulTest(Exception): pass
class TestPeer(ElectrumTestCase):
TESTNET = True
@classmethod
def setUpClass(cls):
super().setUpClass()
console_stderr_handler.setLevel(logging.DEBUG)
def setUp(self):
super().setUp()
self.GRAPH_DEFINITIONS = copy.deepcopy(_GRAPH_DEFINITIONS)
self._lnworkers_created = [] # type: List[MockLNWallet]
async def asyncTearDown(self):
# clean up lnworkers
async with OldTaskGroup() as group:
for lnworker in self._lnworkers_created:
await group.spawn(lnworker.stop())
for lnworker in self._lnworkers_created:
shutil.rmtree(lnworker._user_dir)
self._lnworkers_created.clear()
electrum.trampoline._TRAMPOLINE_NODES_UNITTESTS = {}
await super().asyncTearDown()
@staticmethod
def prepare_invoice(
w2: MockLNWallet, # receiver
*,
amount_msat=100_000_000,
include_routing_hints=False,
payment_preimage: bytes = None,
payment_hash: bytes = None,
invoice_features: LnFeatures = None,
min_final_cltv_delta: int = None,
) -> Tuple[LnAddr, str]:
amount_btc = amount_msat/Decimal(COIN*1000)
if payment_preimage is None and not payment_hash:
payment_preimage = os.urandom(32)
if payment_hash is None:
payment_hash = sha256(payment_preimage)
info = PaymentInfo(payment_hash, amount_msat, RECEIVED, PR_UNPAID)
if payment_preimage:
w2.save_preimage(payment_hash, payment_preimage)
w2.save_payment_info(info)
if include_routing_hints:
routing_hints = w2.calc_routing_hints_for_invoice(amount_msat)
else:
routing_hints = []
trampoline_hints = []
if invoice_features is None:
invoice_features = w2.features.for_invoice()
if invoice_features.supports(LnFeatures.PAYMENT_SECRET_OPT):
payment_secret = w2.get_payment_secret(payment_hash)
else:
payment_secret = None
if min_final_cltv_delta is None:
min_final_cltv_delta = lnutil.MIN_FINAL_CLTV_DELTA_FOR_INVOICE
lnaddr1 = LnAddr(
paymenthash=payment_hash,
amount=amount_btc,
tags=[
('c', min_final_cltv_delta),
('d', 'coffee'),
('9', invoice_features),
] + routing_hints,
payment_secret=payment_secret,
)
invoice = lnencode(lnaddr1, w2.node_keypair.privkey)
lnaddr2 = lndecode(invoice) # unlike lnaddr1, this now has a pubkey set
return lnaddr2, invoice
async def _activate_trampoline(self, w: MockLNWallet):
if w.network.channel_db:
w.network.channel_db.stop()
await w.network.channel_db.stopped_event.wait()
w.network.channel_db = None
def prepare_recipient(self, w2, payment_hash, test_hold_invoice, test_failure):
if not test_hold_invoice and not test_failure:
return
preimage = bytes.fromhex(w2.preimages.pop(payment_hash.hex()))
if test_hold_invoice:
async def cb(payment_hash):
if not test_failure:
w2.save_preimage(payment_hash, preimage)
else:
raise OnionRoutingFailure(code=OnionFailureCode.INCORRECT_OR_UNKNOWN_PAYMENT_DETAILS, data=b'')
w2.register_hold_invoice(payment_hash, cb)
class TestPeerDirect(TestPeer):
def prepare_peers(
self, alice_channel: Channel, bob_channel: Channel,
*, k1: Keypair = None, k2: Keypair = None,
):
if k1 is None:
k1 = keypair()
if k2 is None:
k2 = keypair()
alice_channel.node_id = k2.pubkey
bob_channel.node_id = k1.pubkey
alice_channel.storage['node_id'] = alice_channel.node_id
bob_channel.storage['node_id'] = bob_channel.node_id
t1, t2 = transport_pair(k1, k2, alice_channel.name, bob_channel.name)
q1, q2 = asyncio.Queue(), asyncio.Queue()
w1 = MockLNWallet(local_keypair=k1, chans=[alice_channel], tx_queue=q1, name=bob_channel.name)
w2 = MockLNWallet(local_keypair=k2, chans=[bob_channel], tx_queue=q2, name=alice_channel.name)
self._lnworkers_created.extend([w1, w2])
p1 = PeerInTests(w1, k2.pubkey, t1)
p2 = PeerInTests(w2, k1.pubkey, t2)
w1._peers[p1.pubkey] = p1
w2._peers[p2.pubkey] = p2
# mark_open won't work if state is already OPEN.
# so set it to FUNDED
alice_channel._state = ChannelState.FUNDED
bob_channel._state = ChannelState.FUNDED
# this populates the channel graph:
p1.mark_open(alice_channel)
p2.mark_open(bob_channel)
return p1, p2, w1, w2, q1, q2
async def test_reestablish(self):
alice_channel, bob_channel = create_test_channels()
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel)
for chan in (alice_channel, bob_channel):
chan.peer_state = PeerState.DISCONNECTED
async def reestablish():
await asyncio.gather(
p1.reestablish_channel(alice_channel),
p2.reestablish_channel(bob_channel))
self.assertEqual(alice_channel.peer_state, PeerState.GOOD)
self.assertEqual(bob_channel.peer_state, PeerState.GOOD)
gath.cancel()
gath = asyncio.gather(reestablish(), p1._message_loop(), p2._message_loop(), p1.htlc_switch(), p1.htlc_switch())
with self.assertRaises(asyncio.CancelledError):
await gath
async def test_reestablish_with_old_state(self):
async def f(alice_slow: bool, bob_slow: bool):
random_seed = os.urandom(32)
alice_channel, bob_channel = create_test_channels(random_seed=random_seed)
alice_channel_0, bob_channel_0 = create_test_channels(random_seed=random_seed) # these are identical
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel)
lnaddr, pay_req = self.prepare_invoice(w2)
async def pay():
result, log = await w1.pay_invoice(pay_req)
self.assertEqual(result, True)
gath.cancel()
gath = asyncio.gather(pay(), p1._message_loop(), p2._message_loop(), p1.htlc_switch(), p2.htlc_switch())
with self.assertRaises(asyncio.CancelledError):
await gath
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel_0, bob_channel)
for chan in (alice_channel_0, bob_channel):
chan.peer_state = PeerState.DISCONNECTED
async def alice_sends_reest():
if alice_slow: await asyncio.sleep(0.05)
await p1.reestablish_channel(alice_channel_0)
async def bob_sends_reest():
if bob_slow: await asyncio.sleep(0.05)
await p2.reestablish_channel(bob_channel)
with self.assertRaises(GracefulDisconnect):
async with OldTaskGroup() as group:
await group.spawn(p1._message_loop())
await group.spawn(p1.htlc_switch())
await group.spawn(p2._message_loop())
await group.spawn(p2.htlc_switch())
await group.spawn(alice_sends_reest)
await group.spawn(bob_sends_reest)
self.assertEqual(alice_channel_0.peer_state, PeerState.BAD)
self.assertEqual(alice_channel_0._state, ChannelState.WE_ARE_TOXIC)
self.assertEqual(bob_channel._state, ChannelState.FORCE_CLOSING)
with self.subTest(msg="both fast"):
# FIXME: we want to test the case where both Alice and Bob sends channel-reestablish before
# receiving what the other sent. This is not a reliable way to do that...
await f(alice_slow=False, bob_slow=False)
with self.subTest(msg="alice is slow"):
await f(alice_slow=True, bob_slow=False)
with self.subTest(msg="bob is slow"):
await f(alice_slow=False, bob_slow=True)
@staticmethod
def _send_fake_htlc(peer: Peer, chan: Channel) -> UpdateAddHtlc:
htlc = UpdateAddHtlc(amount_msat=10000, payment_hash=os.urandom(32), cltv_abs=999, timestamp=1)
htlc = chan.add_htlc(htlc)
peer.send_message(
"update_add_htlc",
channel_id=chan.channel_id,
id=htlc.htlc_id,
cltv_expiry=htlc.cltv_abs,
amount_msat=htlc.amount_msat,
payment_hash=htlc.payment_hash,
onion_routing_packet=1366 * b"0",
)
return htlc
async def test_reestablish_replay_messages_rev_then_sig(self):
"""
See https://github.com/lightning/bolts/pull/810#issue-728299277
Rev then Sig
A B
<---add-----
----add---->
<---sig-----
----rev----x
----sig----x
A needs to retransmit:
----rev--> (note that 'add' can be first too)
----add-->
----sig-->
"""
chan_AB, chan_BA = create_test_channels()
k1, k2 = keypair(), keypair()
# note: we don't start peer.htlc_switch() so that the fake htlcs are left alone.
async def f():
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(chan_AB, chan_BA, k1=k1, k2=k2)
async with OldTaskGroup() as group:
await group.spawn(p1._message_loop())
await group.spawn(p2._message_loop())
await p1.initialized
await p2.initialized
self._send_fake_htlc(p2, chan_BA)
self._send_fake_htlc(p1, chan_AB)
p2.transport.queue.put_nowait(asyncio.Event()) # break Bob's incoming pipe
self.assertTrue(p2.maybe_send_commitment(chan_BA))
await p1.received_commitsig_event.wait()
await group.cancel_remaining()
# simulating disconnection. recreate transports.
self.logger.info("simulating disconnection. recreating transports.")
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(chan_AB, chan_BA, k1=k1, k2=k2)
for chan in (chan_AB, chan_BA):
chan.peer_state = PeerState.DISCONNECTED
async with OldTaskGroup() as group:
await group.spawn(p1._message_loop())
await group.spawn(p2._message_loop())
with self.assertLogs('electrum', level='INFO') as logs:
async with OldTaskGroup() as group2:
await group2.spawn(p1.reestablish_channel(chan_AB))
await group2.spawn(p2.reestablish_channel(chan_BA))
self.assertTrue(any(("alice->bob" in msg and
"replaying a revoke_and_ack first" in msg) for msg in logs.output))
self.assertTrue(any(("alice->bob" in msg and
"replayed 2 unacked messages. ['update_add_htlc', 'commitment_signed']" in msg) for msg in logs.output))
self.assertEqual(chan_AB.peer_state, PeerState.GOOD)
self.assertEqual(chan_BA.peer_state, PeerState.GOOD)
await group.cancel_remaining()
raise SuccessfulTest()
with self.assertRaises(SuccessfulTest):
await f()
async def test_reestablish_replay_messages_sig_then_rev(self):
"""
See https://github.com/lightning/bolts/pull/810#issue-728299277
Sig then Rev
A B
<---add-----
----add---->
----sig----x
<---sig-----
----rev----x
A needs to retransmit:
----add-->
----sig-->
----rev-->
"""
chan_AB, chan_BA = create_test_channels()
k1, k2 = keypair(), keypair()
# note: we don't start peer.htlc_switch() so that the fake htlcs are left alone.
async def f():
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(chan_AB, chan_BA, k1=k1, k2=k2)
async with OldTaskGroup() as group:
await group.spawn(p1._message_loop())
await group.spawn(p2._message_loop())
await p1.initialized
await p2.initialized
self._send_fake_htlc(p2, chan_BA)
self._send_fake_htlc(p1, chan_AB)
p2.transport.queue.put_nowait(asyncio.Event()) # break Bob's incoming pipe
self.assertTrue(p1.maybe_send_commitment(chan_AB))
self.assertTrue(p2.maybe_send_commitment(chan_BA))
await p1.received_commitsig_event.wait()
await group.cancel_remaining()
# simulating disconnection. recreate transports.
self.logger.info("simulating disconnection. recreating transports.")
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(chan_AB, chan_BA, k1=k1, k2=k2)
for chan in (chan_AB, chan_BA):
chan.peer_state = PeerState.DISCONNECTED
async with OldTaskGroup() as group:
await group.spawn(p1._message_loop())
await group.spawn(p2._message_loop())
with self.assertLogs('electrum', level='INFO') as logs:
async with OldTaskGroup() as group2:
await group2.spawn(p1.reestablish_channel(chan_AB))
await group2.spawn(p2.reestablish_channel(chan_BA))
self.assertTrue(any(("alice->bob" in msg and
"replaying a revoke_and_ack last" in msg) for msg in logs.output))
self.assertTrue(any(("alice->bob" in msg and
"replayed 2 unacked messages. ['update_add_htlc', 'commitment_signed']" in msg) for msg in logs.output))
self.assertEqual(chan_AB.peer_state, PeerState.GOOD)
self.assertEqual(chan_BA.peer_state, PeerState.GOOD)
await group.cancel_remaining()
raise SuccessfulTest()
with self.assertRaises(SuccessfulTest):
await f()
async def _test_simple_payment(
self,
test_trampoline: bool,
test_hold_invoice=False,
test_failure=False,
test_bundle=False,
test_bundle_timeout=False
):
"""Alice pays Bob a single HTLC via direct channel."""
alice_channel, bob_channel = create_test_channels()
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel)
async def pay(lnaddr, pay_req):
self.assertEqual(PR_UNPAID, w2.get_payment_status(lnaddr.paymenthash))
result, log = await w1.pay_invoice(pay_req)
if result is True:
self.assertEqual(PR_PAID, w2.get_payment_status(lnaddr.paymenthash))
raise PaymentDone()
else:
raise PaymentFailure()
lnaddr, pay_req = self.prepare_invoice(w2)
self.prepare_recipient(w2, lnaddr.paymenthash, test_hold_invoice, test_failure)
if test_bundle:
lnaddr2, pay_req2 = self.prepare_invoice(w2)
w2.bundle_payments([lnaddr.paymenthash, lnaddr2.paymenthash])
if test_trampoline:
await self._activate_trampoline(w1)
# declare bob as trampoline node
electrum.trampoline._TRAMPOLINE_NODES_UNITTESTS = {
'bob': LNPeerAddr(host="127.0.0.1", port=9735, pubkey=w2.node_keypair.pubkey),
}
async def f():
async with OldTaskGroup() as group:
await group.spawn(p1._message_loop())
await group.spawn(p1.htlc_switch())
await group.spawn(p2._message_loop())
await group.spawn(p2.htlc_switch())
await asyncio.sleep(0.01)
invoice_features = lnaddr.get_features()
self.assertFalse(invoice_features.supports(LnFeatures.BASIC_MPP_OPT))
await group.spawn(pay(lnaddr, pay_req))
if test_bundle and not test_bundle_timeout:
await group.spawn(pay(lnaddr2, pay_req2))
await f()
async def test_simple_payment_success(self):
for test_trampoline in [False, True]:
with self.assertRaises(PaymentDone):
await self._test_simple_payment(test_trampoline=test_trampoline)
async def test_simple_payment_failure(self):
for test_trampoline in [False, True]:
with self.assertRaises(PaymentFailure):
await self._test_simple_payment(test_trampoline=test_trampoline, test_failure=True)
async def test_payment_bundle(self):
for test_trampoline in [False, True]:
with self.assertRaises(PaymentDone):
await self._test_simple_payment(test_trampoline=test_trampoline, test_bundle=True)
async def test_payment_bundle_timeout(self):
for test_trampoline in [False, True]:
with self.assertRaises(PaymentFailure):
await self._test_simple_payment(test_trampoline=test_trampoline, test_bundle=True, test_bundle_timeout=True)
async def test_simple_payment_success_with_hold_invoice(self):
for test_trampoline in [False, True]:
with self.assertRaises(PaymentDone):
await self._test_simple_payment(test_trampoline=test_trampoline, test_hold_invoice=True)
async def test_simple_payment_failure_with_hold_invoice(self):
for test_trampoline in [False, True]:
with self.assertRaises(PaymentFailure):
await self._test_simple_payment(test_trampoline=test_trampoline, test_hold_invoice=True, test_failure=True)
async def test_check_invoice_before_payment(self):
alice_channel, bob_channel = create_test_channels()
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel)
async def try_paying_some_invoices():
# feature bits: unknown even fbit
invoice_features = w2.features.for_invoice() | (1 << 990) # add undefined even fbit
lnaddr, pay_req = self.prepare_invoice(w2, invoice_features=invoice_features)
with self.assertRaises(lnutil.UnknownEvenFeatureBits):
result, log = await w1.pay_invoice(pay_req)
# feature bits: not all transitive dependencies are set
invoice_features = LnFeatures((1 << 8) + (1 << 17))
lnaddr, pay_req = self.prepare_invoice(w2, invoice_features=invoice_features)
with self.assertRaises(lnutil.IncompatibleOrInsaneFeatures):
result, log = await w1.pay_invoice(pay_req)
# too large CLTV
lnaddr, pay_req = self.prepare_invoice(w2, min_final_cltv_delta=10**6)
with self.assertRaises(InvoiceError):
result, log = await w1.pay_invoice(pay_req)
raise SuccessfulTest()
async def f():
async with OldTaskGroup() as group:
await group.spawn(p1._message_loop())
await group.spawn(p1.htlc_switch())
await group.spawn(p2._message_loop())
await group.spawn(p2.htlc_switch())
await asyncio.sleep(0.01)
await group.spawn(try_paying_some_invoices())
with self.assertRaises(SuccessfulTest):
await f()
async def test_payment_race(self):
"""Alice and Bob pay each other simultaneously.
They both send 'update_add_htlc' and receive each other's update
before sending 'commitment_signed'. Neither party should fulfill
the respective HTLCs until those are irrevocably committed to.
"""
alice_channel, bob_channel = create_test_channels()
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel)
async def pay():
await util.wait_for2(p1.initialized, 1)
await util.wait_for2(p2.initialized, 1)
# prep
_maybe_send_commitment1 = p1.maybe_send_commitment
_maybe_send_commitment2 = p2.maybe_send_commitment
lnaddr2, pay_req2 = self.prepare_invoice(w2)
lnaddr1, pay_req1 = self.prepare_invoice(w1)
# alice sends htlc BUT NOT COMMITMENT_SIGNED
p1.maybe_send_commitment = lambda x: None
route1 = (await w1.create_routes_from_invoice(lnaddr2.get_amount_msat(), decoded_invoice=lnaddr2))[0][0].route
paysession1 = w1._paysessions[lnaddr2.paymenthash + lnaddr2.payment_secret]
shi1 = SentHtlcInfo(
route=route1,
payment_secret_orig=lnaddr2.payment_secret,
payment_secret_bucket=lnaddr2.payment_secret,
amount_msat=lnaddr2.get_amount_msat(),
bucket_msat=lnaddr2.get_amount_msat(),
amount_receiver_msat=lnaddr2.get_amount_msat(),
trampoline_fee_level=None,
trampoline_route=None,
)
await w1.pay_to_route(
sent_htlc_info=shi1,
paysession=paysession1,
min_final_cltv_delta=lnaddr2.get_min_final_cltv_delta(),
)
p1.maybe_send_commitment = _maybe_send_commitment1
# bob sends htlc BUT NOT COMMITMENT_SIGNED
p2.maybe_send_commitment = lambda x: None
route2 = (await w2.create_routes_from_invoice(lnaddr1.get_amount_msat(), decoded_invoice=lnaddr1))[0][0].route
paysession2 = w2._paysessions[lnaddr1.paymenthash + lnaddr1.payment_secret]
shi2 = SentHtlcInfo(
route=route2,
payment_secret_orig=lnaddr1.payment_secret,
payment_secret_bucket=lnaddr1.payment_secret,
amount_msat=lnaddr1.get_amount_msat(),
bucket_msat=lnaddr1.get_amount_msat(),
amount_receiver_msat=lnaddr1.get_amount_msat(),
trampoline_fee_level=None,
trampoline_route=None,
)
await w2.pay_to_route(
sent_htlc_info=shi2,
paysession=paysession2,
min_final_cltv_delta=lnaddr1.get_min_final_cltv_delta(),
)
p2.maybe_send_commitment = _maybe_send_commitment2
# sleep a bit so that they both receive msgs sent so far
await asyncio.sleep(0.2)
# now they both send COMMITMENT_SIGNED
p1.maybe_send_commitment(alice_channel)
p2.maybe_send_commitment(bob_channel)
htlc_log1 = await paysession1.sent_htlcs_q.get()
self.assertTrue(htlc_log1.success)
htlc_log2 = await paysession2.sent_htlcs_q.get()
self.assertTrue(htlc_log2.success)
raise PaymentDone()
async def f():
async with OldTaskGroup() as group:
await group.spawn(p1._message_loop())
await group.spawn(p1.htlc_switch())
await group.spawn(p2._message_loop())
await group.spawn(p2.htlc_switch())
await asyncio.sleep(0.01)
await group.spawn(pay())
with self.assertRaises(PaymentDone):
await f()
#@unittest.skip("too expensive")
async def test_payments_stresstest(self):
alice_channel, bob_channel = create_test_channels()
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel)
alice_init_balance_msat = alice_channel.balance(HTLCOwner.LOCAL)
bob_init_balance_msat = bob_channel.balance(HTLCOwner.LOCAL)
num_payments = 50
payment_value_msat = 10_000_000 # make it large enough so that there are actually HTLCs on the ctx
max_htlcs_in_flight = asyncio.Semaphore(5)
async def single_payment(pay_req):
async with max_htlcs_in_flight:
await w1.pay_invoice(pay_req)
async def many_payments():
async with OldTaskGroup() as group:
for i in range(num_payments):
lnaddr, pay_req = self.prepare_invoice(w2, amount_msat=payment_value_msat)
await group.spawn(single_payment(pay_req))
gath.cancel()
gath = asyncio.gather(many_payments(), p1._message_loop(), p2._message_loop(), p1.htlc_switch(), p2.htlc_switch())
with self.assertRaises(asyncio.CancelledError):
await gath
self.assertEqual(alice_init_balance_msat - num_payments * payment_value_msat, alice_channel.balance(HTLCOwner.LOCAL))
self.assertEqual(alice_init_balance_msat - num_payments * payment_value_msat, bob_channel.balance(HTLCOwner.REMOTE))
self.assertEqual(bob_init_balance_msat + num_payments * payment_value_msat, bob_channel.balance(HTLCOwner.LOCAL))
self.assertEqual(bob_init_balance_msat + num_payments * payment_value_msat, alice_channel.balance(HTLCOwner.REMOTE))
async def test_payment_recv_mpp_confusion1(self):
"""Regression test for https://github.com/spesmilo/electrum/security/advisories/GHSA-8r85-vp7r-hjxf"""
# This test checks that the following attack does not work:
# - Bob creates invoice1: 1 BTC, H1, S1
# - Bob creates invoice2: 1 BTC, H2, S2; both given to attacker to pay
# - Alice sends htlc1: 0.1 BTC, H1, S1 (total_msat=1 BTC)
# - Alice sends htlc2: 0.9 BTC, H2, S1 (total_msat=1 BTC)
# - Bob(victim) reveals preimage for H1 and fulfills htlc1 (fails other)
alice_channel, bob_channel = create_test_channels()
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel)
async def pay():
self.assertEqual(PR_UNPAID, w2.get_payment_status(lnaddr1.paymenthash))
self.assertEqual(PR_UNPAID, w2.get_payment_status(lnaddr2.paymenthash))
route = (await w1.create_routes_from_invoice(amount_msat=1000, decoded_invoice=lnaddr1))[0][0].route
p1.pay(
route=route,
chan=alice_channel,
amount_msat=1000,
total_msat=lnaddr1.get_amount_msat(),
payment_hash=lnaddr1.paymenthash,
min_final_cltv_delta=lnaddr1.get_min_final_cltv_delta(),
payment_secret=lnaddr1.payment_secret,
)
p1.pay(
route=route,
chan=alice_channel,
amount_msat=lnaddr1.get_amount_msat() - 1000,
total_msat=lnaddr1.get_amount_msat(),
payment_hash=lnaddr2.paymenthash,
min_final_cltv_delta=lnaddr1.get_min_final_cltv_delta(),
payment_secret=lnaddr1.payment_secret,
)
while nhtlc_success + nhtlc_failed < 2:
await htlc_resolved.wait()
self.assertEqual(0, nhtlc_success)
self.assertEqual(2, nhtlc_failed)
raise SuccessfulTest()
w2.features |= LnFeatures.BASIC_MPP_OPT
lnaddr1, _pay_req = self.prepare_invoice(w2, amount_msat=100_000_000)
lnaddr2, _pay_req = self.prepare_invoice(w2, amount_msat=100_000_000)
self.assertTrue(lnaddr1.get_features().supports(LnFeatures.BASIC_MPP_OPT))
self.assertTrue(lnaddr2.get_features().supports(LnFeatures.BASIC_MPP_OPT))
async def f():
async with OldTaskGroup() as group:
await group.spawn(p1._message_loop())
await group.spawn(p1.htlc_switch())
await group.spawn(p2._message_loop())
await group.spawn(p2.htlc_switch())
await asyncio.sleep(0.01)
await group.spawn(pay())
htlc_resolved = asyncio.Event()
nhtlc_success = 0
nhtlc_failed = 0
async def on_htlc_fulfilled(*args):
htlc_resolved.set()
htlc_resolved.clear()
nonlocal nhtlc_success
nhtlc_success += 1
async def on_htlc_failed(*args):
htlc_resolved.set()
htlc_resolved.clear()
nonlocal nhtlc_failed
nhtlc_failed += 1
util.register_callback(on_htlc_fulfilled, ["htlc_fulfilled"])
util.register_callback(on_htlc_failed, ["htlc_failed"])
try:
with self.assertRaises(SuccessfulTest):
await f()
finally:
util.unregister_callback(on_htlc_fulfilled)
util.unregister_callback(on_htlc_failed)
async def test_payment_recv_mpp_confusion2(self):
"""Regression test for https://github.com/spesmilo/electrum/security/advisories/GHSA-8r85-vp7r-hjxf"""
# This test checks that the following attack does not work:
# - Bob creates invoice: 1 BTC
# - Alice sends htlc1: 0.1 BTC (total_msat=0.2 BTC)
# - Alice sends htlc2: 0.1 BTC (total_msat=1 BTC)
# - Bob(victim) reveals preimage and fulfills htlc2 (fails other)
alice_channel, bob_channel = create_test_channels()
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel)
async def pay():
self.assertEqual(PR_UNPAID, w2.get_payment_status(lnaddr1.paymenthash))
route = (await w1.create_routes_from_invoice(amount_msat=1000, decoded_invoice=lnaddr1))[0][0].route
p1.pay(
route=route,
chan=alice_channel,
amount_msat=1000,
total_msat=2000,
payment_hash=lnaddr1.paymenthash,
min_final_cltv_delta=lnaddr1.get_min_final_cltv_delta(),
payment_secret=lnaddr1.payment_secret,
)
p1.pay(
route=route,
chan=alice_channel,
amount_msat=1000,
total_msat=lnaddr1.get_amount_msat(),
payment_hash=lnaddr1.paymenthash,
min_final_cltv_delta=lnaddr1.get_min_final_cltv_delta(),
payment_secret=lnaddr1.payment_secret,
)
while nhtlc_success + nhtlc_failed < 2:
await htlc_resolved.wait()
self.assertEqual(0, nhtlc_success)
self.assertEqual(2, nhtlc_failed)
raise SuccessfulTest()
w2.features |= LnFeatures.BASIC_MPP_OPT
lnaddr1, _pay_req = self.prepare_invoice(w2, amount_msat=100_000_000)
self.assertTrue(lnaddr1.get_features().supports(LnFeatures.BASIC_MPP_OPT))
async def f():
async with OldTaskGroup() as group:
await group.spawn(p1._message_loop())
await group.spawn(p1.htlc_switch())
await group.spawn(p2._message_loop())
await group.spawn(p2.htlc_switch())
await asyncio.sleep(0.01)
await group.spawn(pay())
htlc_resolved = asyncio.Event()
nhtlc_success = 0
nhtlc_failed = 0
async def on_htlc_fulfilled(*args):
htlc_resolved.set()
htlc_resolved.clear()
nonlocal nhtlc_success
nhtlc_success += 1
async def on_htlc_failed(*args):
htlc_resolved.set()
htlc_resolved.clear()
nonlocal nhtlc_failed
nhtlc_failed += 1
util.register_callback(on_htlc_fulfilled, ["htlc_fulfilled"])
util.register_callback(on_htlc_failed, ["htlc_failed"])
try:
with self.assertRaises(SuccessfulTest):
await f()
finally:
util.unregister_callback(on_htlc_fulfilled)
util.unregister_callback(on_htlc_failed)
async def test_legacy_shutdown_low(self):
await self._test_shutdown(alice_fee=100, bob_fee=150)
async def test_legacy_shutdown_high(self):
await self._test_shutdown(alice_fee=2000, bob_fee=100)
async def test_modern_shutdown_with_overlap(self):
await self._test_shutdown(
alice_fee=1,
bob_fee=200,
alice_fee_range={'min_fee_satoshis': 1, 'max_fee_satoshis': 10},
bob_fee_range={'min_fee_satoshis': 10, 'max_fee_satoshis': 300})
## This test works but it is too slow (LN_P2P_NETWORK_TIMEOUT)
## because tests do not use a proper LNWorker object
#def test_modern_shutdown_no_overlap(self):
# self.assertRaises(Exception, lambda: asyncio.run(
# self._test_shutdown(
# alice_fee=1,
# bob_fee=200,
# alice_fee_range={'min_fee_satoshis': 1, 'max_fee_satoshis': 10},
# bob_fee_range={'min_fee_satoshis': 50, 'max_fee_satoshis': 300})
# ))
async def _test_shutdown(self, alice_fee, bob_fee, alice_fee_range=None, bob_fee_range=None):
alice_channel, bob_channel = create_test_channels()
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel)
w1.network.config.TEST_SHUTDOWN_FEE = alice_fee
w2.network.config.TEST_SHUTDOWN_FEE = bob_fee
if alice_fee_range is not None:
w1.network.config.TEST_SHUTDOWN_FEE_RANGE = alice_fee_range
else:
w1.network.config.TEST_SHUTDOWN_LEGACY = True
if bob_fee_range is not None:
w2.network.config.TEST_SHUTDOWN_FEE_RANGE = bob_fee_range
else:
w2.network.config.TEST_SHUTDOWN_LEGACY = True
w2.enable_htlc_settle = False
lnaddr, pay_req = self.prepare_invoice(w2)
async def pay():
await util.wait_for2(p1.initialized, 1)
await util.wait_for2(p2.initialized, 1)
# alice sends htlc
route = (await w1.create_routes_from_invoice(lnaddr.get_amount_msat(), decoded_invoice=lnaddr))[0][0].route
p1.pay(route=route,
chan=alice_channel,
amount_msat=lnaddr.get_amount_msat(),
total_msat=lnaddr.get_amount_msat(),
payment_hash=lnaddr.paymenthash,
min_final_cltv_delta=lnaddr.get_min_final_cltv_delta(),
payment_secret=lnaddr.payment_secret)
# alice closes
await p1.close_channel(alice_channel.channel_id)
gath.cancel()
async def set_settle():
await asyncio.sleep(0.1)
w2.enable_htlc_settle = True
gath = asyncio.gather(pay(), set_settle(), p1._message_loop(), p2._message_loop(), p1.htlc_switch(), p2.htlc_switch())
with self.assertRaises(asyncio.CancelledError):
await gath
async def test_warning(self):
alice_channel, bob_channel = create_test_channels()
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel)
async def action():
await util.wait_for2(p1.initialized, 1)
await util.wait_for2(p2.initialized, 1)
await p1.send_warning(alice_channel.channel_id, 'be warned!', close_connection=True)
gath = asyncio.gather(action(), p1._message_loop(), p2._message_loop(), p1.htlc_switch(), p2.htlc_switch())
with self.assertRaises(GracefulDisconnect):
await gath
async def test_error(self):
alice_channel, bob_channel = create_test_channels()
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel)
async def action():
await util.wait_for2(p1.initialized, 1)
await util.wait_for2(p2.initialized, 1)
await p1.send_error(alice_channel.channel_id, 'some error happened!', force_close_channel=True)
assert alice_channel.is_closed()
gath.cancel()
gath = asyncio.gather(action(), p1._message_loop(), p2._message_loop(), p1.htlc_switch(), p2.htlc_switch())
with self.assertRaises(GracefulDisconnect):
await gath
async def test_close_upfront_shutdown_script(self):
alice_channel, bob_channel = create_test_channels()
# create upfront shutdown script for bob, alice doesn't use upfront
# shutdown script
bob_uss_pub = privkey_to_pubkey(os.urandom(32))
bob_uss_addr = bitcoin.pubkey_to_address('p2wpkh', bob_uss_pub.hex())
bob_uss = bitcoin.address_to_script(bob_uss_addr)
# bob commits to close to bob_uss
alice_channel.config[HTLCOwner.REMOTE].upfront_shutdown_script = bob_uss
# but bob closes to some receiving address, which we achieve by not
# setting the upfront shutdown script in the channel config
bob_channel.config[HTLCOwner.LOCAL].upfront_shutdown_script = b''
p1, p2, w1, w2, q1, q2 = self.prepare_peers(alice_channel, bob_channel)
w1.network.config.FEE_EST_DYNAMIC = False
w2.network.config.FEE_EST_DYNAMIC = False
w1.network.config.FEE_EST_STATIC_FEERATE = 5000
w2.network.config.FEE_EST_STATIC_FEERATE = 1000
async def test():
async def close():
await util.wait_for2(p1.initialized, 1)
await util.wait_for2(p2.initialized, 1)
# bob closes channel with different shutdown script
await p1.close_channel(alice_channel.channel_id)
self.fail("p1.close_channel should have raised above!")
async def main_loop(peer):
async with peer.taskgroup as group:
await group.spawn(peer._message_loop())
await group.spawn(peer.htlc_switch())
coros = [close(), main_loop(p1), main_loop(p2)]
gath = asyncio.gather(*coros)
await gath
with self.assertRaises(GracefulDisconnect):
await test()
# check that neither party broadcast a closing tx (as it was not even signed)
self.assertEqual(0, q1.qsize())
self.assertEqual(0, q2.qsize())
# -- new scenario:
# bob sends the same upfront_shutdown_script has he announced
alice_channel.config[HTLCOwner.REMOTE].upfront_shutdown_script = bob_uss
bob_channel.config[HTLCOwner.LOCAL].upfront_shutdown_script = bob_uss
p1, p2, w1, w2, q1, q2 = self.prepare_peers(alice_channel, bob_channel)
w1.network.config.FEE_EST_DYNAMIC = False
w2.network.config.FEE_EST_DYNAMIC = False
w1.network.config.FEE_EST_STATIC_FEERATE = 5000
w2.network.config.FEE_EST_STATIC_FEERATE = 1000
async def test():
async def close():
await util.wait_for2(p1.initialized, 1)
await util.wait_for2(p2.initialized, 1)
await p1.close_channel(alice_channel.channel_id)
gath.cancel()
async def main_loop(peer):
async with peer.taskgroup as group:
await group.spawn(peer._message_loop())
await group.spawn(peer.htlc_switch())
coros = [close(), main_loop(p1), main_loop(p2)]
gath = asyncio.gather(*coros)
await gath
with self.assertRaises(asyncio.CancelledError):
await test()
# check if p1 has broadcast the closing tx, and if it pays to Bob's uss
self.assertEqual(1, q1.qsize())
closing_tx = q1.get_nowait() # type: Transaction
self.assertEqual(2, len(closing_tx.outputs()))
self.assertEqual(1, len(closing_tx.get_output_idxs_from_address(bob_uss_addr)))
async def test_channel_usage_after_closing(self):
alice_channel, bob_channel = create_test_channels()
p1, p2, w1, w2, q1, q2 = self.prepare_peers(alice_channel, bob_channel)
lnaddr, pay_req = self.prepare_invoice(w2)
lnaddr = w1._check_invoice(pay_req)
shi = (await w1.create_routes_from_invoice(lnaddr.get_amount_msat(), decoded_invoice=lnaddr))[0][0]
route, amount_msat = shi.route, shi.amount_msat
assert amount_msat == lnaddr.get_amount_msat()
await w1.force_close_channel(alice_channel.channel_id)
# check if a tx (commitment transaction) was broadcasted:
assert q1.qsize() == 1
with self.assertRaises(NoPathFound) as e:
await w1.create_routes_from_invoice(lnaddr.get_amount_msat(), decoded_invoice=lnaddr)
peer = w1.peers[route[0].node_id]
# AssertionError is ok since we shouldn't use old routes, and the
# route finding should fail when channel is closed
async def f():
shi = SentHtlcInfo(
route=route,
payment_secret_orig=lnaddr.payment_secret,
payment_secret_bucket=lnaddr.payment_secret,
amount_msat=amount_msat,
bucket_msat=amount_msat,
amount_receiver_msat=amount_msat,
trampoline_fee_level=None,
trampoline_route=None,
)
paysession = w1._paysessions[lnaddr.paymenthash + lnaddr.payment_secret]
pay = w1.pay_to_route(
sent_htlc_info=shi,
paysession=paysession,
min_final_cltv_delta=lnaddr.get_min_final_cltv_delta(),
)
await asyncio.gather(pay, p1._message_loop(), p2._message_loop(), p1.htlc_switch(), p2.htlc_switch())
with self.assertRaises(PaymentFailure):
await f()
async def test_sending_weird_messages_that_should_be_ignored(self):
alice_channel, bob_channel = create_test_channels()
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel)
async def send_weird_messages():
await util.wait_for2(p1.initialized, 1)
await util.wait_for2(p2.initialized, 1)
# peer1 sends known message with trailing garbage
# BOLT-01 says peer2 should ignore trailing garbage
raw_msg1 = encode_msg('ping', num_pong_bytes=4, byteslen=4) + bytes(range(55))
p1.transport.send_bytes(raw_msg1)
await asyncio.sleep(0.05)
# peer1 sends unknown 'odd-type' message
# BOLT-01 says peer2 should ignore whole message
raw_msg2 = (43333).to_bytes(length=2, byteorder="big") + bytes(range(55))
p1.transport.send_bytes(raw_msg2)
await asyncio.sleep(0.05)
raise SuccessfulTest()
async def f():
async with OldTaskGroup() as group:
for peer in [p1, p2]:
await group.spawn(peer._message_loop())
await group.spawn(peer.htlc_switch())
for peer in [p1, p2]:
await peer.initialized
await group.spawn(send_weird_messages())
with self.assertRaises(SuccessfulTest):
await f()
async def test_sending_weird_messages__unknown_even_type(self):
alice_channel, bob_channel = create_test_channels()
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel)
async def send_weird_messages():
await util.wait_for2(p1.initialized, 1)
await util.wait_for2(p2.initialized, 1)
# peer1 sends unknown 'even-type' message
# BOLT-01 says peer2 should close the connection
raw_msg2 = (43334).to_bytes(length=2, byteorder="big") + bytes(range(55))
p1.transport.send_bytes(raw_msg2)
await asyncio.sleep(0.05)
failing_task = None
async def f():
nonlocal failing_task
async with OldTaskGroup() as group:
await group.spawn(p1._message_loop())
await group.spawn(p1.htlc_switch())
failing_task = await group.spawn(p2._message_loop())
await group.spawn(p2.htlc_switch())
for peer in [p1, p2]:
await peer.initialized
await group.spawn(send_weird_messages())
with self.assertRaises(GracefulDisconnect):
await f()
self.assertTrue(isinstance(failing_task.exception().__cause__, lnmsg.UnknownMandatoryMsgType))
async def test_sending_weird_messages__known_msg_with_insufficient_length(self):
alice_channel, bob_channel = create_test_channels()
p1, p2, w1, w2, _q1, _q2 = self.prepare_peers(alice_channel, bob_channel)
async def send_weird_messages():
await util.wait_for2(p1.initialized, 1)
await util.wait_for2(p2.initialized, 1)
# peer1 sends known message with insufficient length for the contents
# BOLT-01 says peer2 should fail the connection
raw_msg1 = encode_msg('ping', num_pong_bytes=4, byteslen=4)[:-1]
p1.transport.send_bytes(raw_msg1)
await asyncio.sleep(0.05)
failing_task = None
async def f():
nonlocal failing_task
async with OldTaskGroup() as group:
await group.spawn(p1._message_loop())
await group.spawn(p1.htlc_switch())
failing_task = await group.spawn(p2._message_loop())
await group.spawn(p2.htlc_switch())
for peer in [p1, p2]:
await peer.initialized
await group.spawn(send_weird_messages())
with self.assertRaises(GracefulDisconnect):
await f()
self.assertTrue(isinstance(failing_task.exception().__cause__, lnmsg.UnexpectedEndOfStream))
class TestPeerForwarding(TestPeer):
def prepare_chans_and_peers_in_graph(self, graph_definition) -> Graph:
keys = {k: keypair() for k in graph_definition}
txs_queues = {k: asyncio.Queue() for k in graph_definition}
channels = {} # type: Dict[Tuple[str, str], Channel]
transports = {}
workers = {} # type: Dict[str, MockLNWallet]
peers = {}
# create channels
for a, definition in graph_definition.items():
for b, channel_def in definition.get('channels', {}).items():
channel_ab, channel_ba = create_test_channels(
alice_name=a,
bob_name=b,
alice_pubkey=keys[a].pubkey,
bob_pubkey=keys[b].pubkey,
local_msat=channel_def['local_balance_msat'],
remote_msat=channel_def['remote_balance_msat'],
)
channels[(a, b)], channels[(b, a)] = channel_ab, channel_ba
transport_ab, transport_ba = transport_pair(keys[a], keys[b], channel_ab.name, channel_ba.name)
transports[(a, b)], transports[(b, a)] = transport_ab, transport_ba
# set fees
channel_ab.forwarding_fee_proportional_millionths = channel_def['local_fee_rate_millionths']
channel_ab.forwarding_fee_base_msat = channel_def['local_base_fee_msat']
channel_ba.forwarding_fee_proportional_millionths = channel_def['remote_fee_rate_millionths']
channel_ba.forwarding_fee_base_msat = channel_def['remote_base_fee_msat']
# create workers and peers
for a, definition in graph_definition.items():
channels_of_node = [c for k, c in channels.items() if k[0] == a]
workers[a] = MockLNWallet(local_keypair=keys[a], chans=channels_of_node, tx_queue=txs_queues[a], name=a)
self._lnworkers_created.extend(list(workers.values()))
# create peers
for ab in channels.keys():
peers[ab] = Peer(workers[ab[0]], keys[ab[1]].pubkey, transports[ab])
# add peers to workers
for a, w in workers.items():
for ab, peer_ab in peers.items():
if ab[0] == a:
w._peers[peer_ab.pubkey] = peer_ab
# set forwarding properties
for a, definition in graph_definition.items():
for property in definition.get('config', {}).items():
workers[a].network.config.set_key(*property)
# mark_open won't work if state is already OPEN.
# so set it to FUNDED
for channel_ab in channels.values():
channel_ab._state = ChannelState.FUNDED
# this populates the channel graph:
for ab, peer_ab in peers.items():
peer_ab.mark_open(channels[ab])
graph = Graph(
workers=workers,
peers=peers,
channels=channels,
)
for a in workers:
print(f"{a:5s}: {keys[a].pubkey}")
print(f" {keys[a].pubkey.hex()}")
return graph
async def test_payment_multihop(self):
graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph'])
peers = graph.peers.values()
async def pay(lnaddr, pay_req):
self.assertEqual(PR_UNPAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash))
result, log = await graph.workers['alice'].pay_invoice(pay_req)
self.assertTrue(result)
self.assertEqual(PR_PAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash))
raise PaymentDone()
async def f():
async with OldTaskGroup() as group:
for peer in peers:
await group.spawn(peer._message_loop())
await group.spawn(peer.htlc_switch())
for peer in peers:
await peer.initialized
lnaddr, pay_req = self.prepare_invoice(graph.workers['dave'], include_routing_hints=True)
await group.spawn(pay(lnaddr, pay_req))
with self.assertRaises(PaymentDone):
await f()
async def test_payment_multihop_with_preselected_path(self):
graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph'])
peers = graph.peers.values()
async def pay(pay_req):
with self.subTest(msg="bad path: edges do not chain together"):
path = [PathEdge(start_node=graph.workers['alice'].node_keypair.pubkey,
end_node=graph.workers['carol'].node_keypair.pubkey,
short_channel_id=graph.channels[('alice', 'bob')].short_channel_id),
PathEdge(start_node=graph.workers['bob'].node_keypair.pubkey,
end_node=graph.workers['dave'].node_keypair.pubkey,
short_channel_id=graph.channels['bob', 'dave'].short_channel_id)]
with self.assertRaises(LNPathInconsistent):
await graph.workers['alice'].pay_invoice(pay_req, full_path=path)
with self.subTest(msg="bad path: last node id differs from invoice pubkey"):
path = [PathEdge(start_node=graph.workers['alice'].node_keypair.pubkey,
end_node=graph.workers['bob'].node_keypair.pubkey,
short_channel_id=graph.channels[('alice', 'bob')].short_channel_id)]
with self.assertRaises(LNPathInconsistent):
await graph.workers['alice'].pay_invoice(pay_req, full_path=path)
with self.subTest(msg="good path"):
path = [PathEdge(start_node=graph.workers['alice'].node_keypair.pubkey,
end_node=graph.workers['bob'].node_keypair.pubkey,
short_channel_id=graph.channels[('alice', 'bob')].short_channel_id),
PathEdge(start_node=graph.workers['bob'].node_keypair.pubkey,
end_node=graph.workers['dave'].node_keypair.pubkey,
short_channel_id=graph.channels['bob', 'dave'].short_channel_id)]
result, log = await graph.workers['alice'].pay_invoice(pay_req, full_path=path)
self.assertTrue(result)
self.assertEqual(
[edge.short_channel_id for edge in path],
[edge.short_channel_id for edge in log[0].route])
raise PaymentDone()
async def f():
async with OldTaskGroup() as group:
for peer in peers:
await group.spawn(peer._message_loop())
await group.spawn(peer.htlc_switch())
for peer in peers:
await peer.initialized
lnaddr, pay_req = self.prepare_invoice(graph.workers['dave'], include_routing_hints=True)
await group.spawn(pay(pay_req))
with self.assertRaises(PaymentDone):
await f()
async def test_payment_multihop_temp_node_failure(self):
graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph'])
graph.workers['bob'].network.config.TEST_FAIL_HTLCS_WITH_TEMP_NODE_FAILURE = True
graph.workers['carol'].network.config.TEST_FAIL_HTLCS_WITH_TEMP_NODE_FAILURE = True
peers = graph.peers.values()
async def pay(lnaddr, pay_req):
self.assertEqual(PR_UNPAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash))
result, log = await graph.workers['alice'].pay_invoice(pay_req)
self.assertFalse(result)
self.assertEqual(PR_UNPAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash))
self.assertEqual(OnionFailureCode.TEMPORARY_NODE_FAILURE, log[0].failure_msg.code)
raise PaymentDone()
async def f():
async with OldTaskGroup() as group:
for peer in peers:
await group.spawn(peer._message_loop())
await group.spawn(peer.htlc_switch())
for peer in peers:
await peer.initialized
lnaddr, pay_req = self.prepare_invoice(graph.workers['dave'], include_routing_hints=True)
await group.spawn(pay(lnaddr, pay_req))
with self.assertRaises(PaymentDone):
await f()
async def test_payment_multihop_route_around_failure(self):
# Alice will pay Dave. Alice first tries A->C->D route, due to lower fees, but Carol
# will fail the htlc and get blacklisted. Alice will then try A->B->D and succeed.
graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph'])
graph.workers['carol'].network.config.TEST_FAIL_HTLCS_WITH_TEMP_NODE_FAILURE = True
peers = graph.peers.values()
async def pay(lnaddr, pay_req):
self.assertEqual(500000000000, graph.channels[('alice', 'bob')].balance(LOCAL))
self.assertEqual(500000000000, graph.channels[('dave', 'bob')].balance(LOCAL))
self.assertEqual(PR_UNPAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash))
result, log = await graph.workers['alice'].pay_invoice(pay_req, attempts=2)
self.assertEqual(2, len(log))
self.assertTrue(result)
self.assertEqual(PR_PAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash))
self.assertEqual([graph.channels[('alice', 'carol')].short_channel_id, graph.channels[('carol', 'dave')].short_channel_id],
[edge.short_channel_id for edge in log[0].route])
self.assertEqual([graph.channels[('alice', 'bob')].short_channel_id, graph.channels[('bob', 'dave')].short_channel_id],
[edge.short_channel_id for edge in log[1].route])
self.assertEqual(OnionFailureCode.TEMPORARY_NODE_FAILURE, log[0].failure_msg.code)
self.assertEqual(499899450000, graph.channels[('alice', 'bob')].balance(LOCAL))
await asyncio.sleep(0.2) # wait for COMMITMENT_SIGNED / REVACK msgs to update balance
self.assertEqual(500100000000, graph.channels[('dave', 'bob')].balance(LOCAL))
raise PaymentDone()
async def f():
async with OldTaskGroup() as group:
for peer in peers:
await group.spawn(peer._message_loop())
await group.spawn(peer.htlc_switch())
for peer in peers:
await peer.initialized
lnaddr, pay_req = self.prepare_invoice(graph.workers['dave'], include_routing_hints=True)
invoice_features = lnaddr.get_features()
self.assertFalse(invoice_features.supports(LnFeatures.BASIC_MPP_OPT))
await group.spawn(pay(lnaddr, pay_req))
with self.assertRaises(PaymentDone):
await f()
async def test_refuse_to_forward_htlc_that_corresponds_to_payreq_we_created(self):
# This test checks that the following attack does not work:
# - Bob creates payment request with HASH1, for 1 BTC; and gives the payreq to Alice
# - Alice sends htlc A->B->D, for 100k sat, with HASH1
# - Bob must not release the preimage of HASH1
graph_def = self.GRAPH_DEFINITIONS['square_graph']
graph_def.pop('carol')
graph_def['alice']['channels'].pop('carol')
# now graph is linear: A <-> B <-> D
graph = self.prepare_chans_and_peers_in_graph(graph_def)
peers = graph.peers.values()
async def pay():
lnaddr1, pay_req1 = self.prepare_invoice(
graph.workers['bob'],
amount_msat=100_000_000_000,
)
lnaddr2, pay_req2 = self.prepare_invoice(
graph.workers['dave'],
amount_msat=100_000_000,
payment_hash=lnaddr1.paymenthash, # Dave is cooperating with Alice, and he reuses Bob's hash
include_routing_hints=True,
)
with self.subTest(msg="try to make Bob forward in legacy (non-trampoline) mode"):
result, log = await graph.workers['alice'].pay_invoice(pay_req2, attempts=1)
self.assertFalse(result)
self.assertEqual(OnionFailureCode.TEMPORARY_NODE_FAILURE, log[0].failure_msg.code)
self.assertEqual(None, graph.workers['alice'].get_preimage(lnaddr1.paymenthash))
with self.subTest(msg="try to make Bob forward in trampoline mode"):
# declare Bob as trampoline forwarding node
electrum.trampoline._TRAMPOLINE_NODES_UNITTESTS = {
graph.workers['bob'].name: LNPeerAddr(host="127.0.0.1", port=9735, pubkey=graph.workers['bob'].node_keypair.pubkey),
}
await self._activate_trampoline(graph.workers['alice'])
result, log = await graph.workers['alice'].pay_invoice(pay_req2, attempts=5)
self.assertFalse(result)
self.assertEqual(OnionFailureCode.TEMPORARY_NODE_FAILURE, log[0].failure_msg.code)
self.assertEqual(None, graph.workers['alice'].get_preimage(lnaddr1.paymenthash))
raise SuccessfulTest()
async def f():
async with OldTaskGroup() as group:
for peer in peers:
await group.spawn(peer._message_loop())
await group.spawn(peer.htlc_switch())
for peer in peers:
await peer.initialized
await group.spawn(pay())
with self.assertRaises(SuccessfulTest):
await f()
async def test_payment_with_temp_channel_failure_and_liquidity_hints(self):
# prepare channels such that a temporary channel failure happens at c->d
graph_definition = self.GRAPH_DEFINITIONS['square_graph']
graph_definition['alice']['channels']['carol']['local_balance_msat'] = 200_000_000
graph_definition['alice']['channels']['carol']['remote_balance_msat'] = 200_000_000
graph_definition['carol']['channels']['dave']['local_balance_msat'] = 50_000_000
graph_definition['carol']['channels']['dave']['remote_balance_msat'] = 200_000_000
graph_definition['alice']['channels']['bob']['local_balance_msat'] = 200_000_000
graph_definition['alice']['channels']['bob']['remote_balance_msat'] = 200_000_000
graph_definition['bob']['channels']['dave']['local_balance_msat'] = 200_000_000
graph_definition['bob']['channels']['dave']['remote_balance_msat'] = 200_000_000
graph = self.prepare_chans_and_peers_in_graph(graph_definition)
# the payment happens in two attempts:
# 1. along a->c->d due to low fees with temp channel failure:
# with chanupd: ORPHANED, private channel update
# c->d gets a liquidity hint and gets blocked
# 2. along a->b->d with success
amount_to_pay = 100_000_000
peers = graph.peers.values()
async def pay(lnaddr, pay_req):
self.assertEqual(PR_UNPAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash))
result, log = await graph.workers['alice'].pay_invoice(pay_req, attempts=3)
self.assertTrue(result)
self.assertEqual(2, len(log))
self.assertEqual(PR_PAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash))
self.assertEqual(OnionFailureCode.TEMPORARY_CHANNEL_FAILURE, log[0].failure_msg.code)
liquidity_hints = graph.workers['alice'].network.path_finder.liquidity_hints
pubkey_a = graph.workers['alice'].node_keypair.pubkey
pubkey_b = graph.workers['bob'].node_keypair.pubkey
pubkey_c = graph.workers['carol'].node_keypair.pubkey
pubkey_d = graph.workers['dave'].node_keypair.pubkey
# check liquidity hints for failing route:
hint_ac = liquidity_hints.get_hint(graph.channels[('alice', 'carol')].short_channel_id)
hint_cd = liquidity_hints.get_hint(graph.channels[('carol', 'dave')].short_channel_id)
self.assertEqual(amount_to_pay, hint_ac.can_send(pubkey_a < pubkey_c))
self.assertEqual(None, hint_ac.cannot_send(pubkey_a < pubkey_c))
self.assertEqual(None, hint_cd.can_send(pubkey_c < pubkey_d))
self.assertEqual(amount_to_pay, hint_cd.cannot_send(pubkey_c < pubkey_d))
# check liquidity hints for successful route:
hint_ab = liquidity_hints.get_hint(graph.channels[('alice', 'bob')].short_channel_id)
hint_bd = liquidity_hints.get_hint(graph.channels[('bob', 'dave')].short_channel_id)
self.assertEqual(amount_to_pay, hint_ab.can_send(pubkey_a < pubkey_b))
self.assertEqual(None, hint_ab.cannot_send(pubkey_a < pubkey_b))
self.assertEqual(amount_to_pay, hint_bd.can_send(pubkey_b < pubkey_d))
self.assertEqual(None, hint_bd.cannot_send(pubkey_b < pubkey_d))
raise PaymentDone()
async def f():
async with OldTaskGroup() as group:
for peer in peers:
await group.spawn(peer._message_loop())
await group.spawn(peer.htlc_switch())
for peer in peers:
await peer.initialized
lnaddr, pay_req = self.prepare_invoice(graph.workers['dave'], amount_msat=amount_to_pay, include_routing_hints=True)
await group.spawn(pay(lnaddr, pay_req))
with self.assertRaises(PaymentDone):
await f()
async def _run_mpp(self, graph, kwargs):
"""Tests a multipart payment scenario for failing and successful cases."""
self.assertEqual(500_000_000_000, graph.channels[('alice', 'bob')].balance(LOCAL))
self.assertEqual(500_000_000_000, graph.channels[('alice', 'carol')].balance(LOCAL))
amount_to_pay = 600_000_000_000
peers = graph.peers.values()
async def pay(
attempts=1,
alice_uses_trampoline=False,
bob_forwarding=True,
mpp_invoice=True,
disable_trampoline_receiving=False,
test_hold_invoice=False,
test_failure=False,
):
alice_w = graph.workers['alice']
bob_w = graph.workers['bob']
carol_w = graph.workers['carol']
dave_w = graph.workers['dave']
if mpp_invoice:
dave_w.features |= LnFeatures.BASIC_MPP_OPT
if disable_trampoline_receiving:
dave_w.features &= ~LnFeatures.OPTION_TRAMPOLINE_ROUTING_OPT_ELECTRUM
if not bob_forwarding:
bob_w.enable_htlc_forwarding = False
if alice_uses_trampoline:
await self._activate_trampoline(alice_w)
else:
assert alice_w.network.channel_db is not None
lnaddr, pay_req = self.prepare_invoice(dave_w, include_routing_hints=True, amount_msat=amount_to_pay)
self.prepare_recipient(dave_w, lnaddr.paymenthash, test_hold_invoice, test_failure)
self.assertEqual(PR_UNPAID, dave_w.get_payment_status(lnaddr.paymenthash))
result, log = await alice_w.pay_invoice(pay_req, attempts=attempts)
if not bob_forwarding:
# reset to previous state, sleep 2s so that the second htlc can time out
graph.workers['bob'].enable_htlc_forwarding = True
await asyncio.sleep(2)
if result:
self.assertEqual(PR_PAID, dave_w.get_payment_status(lnaddr.paymenthash))
# check mpp is cleaned up
async with OldTaskGroup() as g:
for peer in peers:
await g.spawn(peer.wait_one_htlc_switch_iteration())
for peer in peers:
self.assertEqual(len(peer.lnworker.received_mpp_htlcs), 0)
raise PaymentDone()
elif len(log) == 1 and log[0].failure_msg.code == OnionFailureCode.MPP_TIMEOUT:
raise PaymentTimeout()
else:
raise NoPathFound()
async with OldTaskGroup() as group:
for peer in peers:
await group.spawn(peer._message_loop())
await group.spawn(peer.htlc_switch())
for peer in peers:
await peer.initialized
await group.spawn(pay(**kwargs))
async def test_payment_multipart(self):
graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph'])
with self.assertRaises(PaymentDone):
await self._run_mpp(graph, {})
async def test_payment_multipart_with_hold_invoice(self):
graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph'])
with self.assertRaises(PaymentDone):
await self._run_mpp(graph, {'test_hold_invoice': True})
async def test_payment_multipart_with_timeout(self):
graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph'])
with self.assertRaises(PaymentTimeout):
await self._run_mpp(graph, {'bob_forwarding': False})
async def test_payment_multipart_wrong_invoice(self):
graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph'])
with self.assertRaises(NoPathFound):
await self._run_mpp(graph, {'mpp_invoice': False})
async def test_payment_multipart_trampoline_e2e(self):
graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph'])
electrum.trampoline._TRAMPOLINE_NODES_UNITTESTS = {
graph.workers['bob'].name: LNPeerAddr(host="127.0.0.1", port=9735, pubkey=graph.workers['bob'].node_keypair.pubkey),
graph.workers['carol'].name: LNPeerAddr(host="127.0.0.1", port=9735, pubkey=graph.workers['carol'].node_keypair.pubkey),
}
# end-to-end trampoline: we attempt
# * a payment with one trial: fails, because
# we need at least one trial because the initial fees are too low
# * a payment with several trials: should succeed
with self.assertRaises(NoPathFound):
await self._run_mpp(graph, {'alice_uses_trampoline': True, 'attempts': 1})
with self.assertRaises(PaymentDone):
await self._run_mpp(graph,{'alice_uses_trampoline': True, 'attempts': 30})
async def test_payment_multipart_trampoline_legacy(self):
graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph'])
electrum.trampoline._TRAMPOLINE_NODES_UNITTESTS = {
graph.workers['bob'].name: LNPeerAddr(host="127.0.0.1", port=9735, pubkey=graph.workers['bob'].node_keypair.pubkey),
graph.workers['carol'].name: LNPeerAddr(host="127.0.0.1", port=9735, pubkey=graph.workers['carol'].node_keypair.pubkey),
}
# trampoline-to-legacy: this is restricted, as there are no forwarders capable of doing this
with self.assertRaises(NoPathFound):
await self._run_mpp(graph, {'alice_uses_trampoline': True, 'attempts': 30, 'disable_trampoline_receiving': True})
async def test_fail_pending_htlcs_on_shutdown(self):
"""Alice tries to pay Dave via MPP. Dave receives some HTLCs but not all.
Dave shuts down (stops wallet).
We test if Dave fails the pending HTLCs during shutdown.
"""
graph = self.prepare_chans_and_peers_in_graph(self.GRAPH_DEFINITIONS['square_graph'])
self.assertEqual(500_000_000_000, graph.channels[('alice', 'bob')].balance(LOCAL))
self.assertEqual(500_000_000_000, graph.channels[('alice', 'carol')].balance(LOCAL))
amount_to_pay = 600_000_000_000
peers = graph.peers.values()
graph.workers['dave'].MPP_EXPIRY = 120
graph.workers['dave'].TIMEOUT_SHUTDOWN_FAIL_PENDING_HTLCS = 3
async def pay():
graph.workers['dave'].features |= LnFeatures.BASIC_MPP_OPT
graph.workers['bob'].enable_htlc_forwarding = False # Bob will hold forwarded HTLCs
assert graph.workers['alice'].network.channel_db is not None
lnaddr, pay_req = self.prepare_invoice(graph.workers['dave'], include_routing_hints=True, amount_msat=amount_to_pay)
result, log = await graph.workers['alice'].pay_invoice(pay_req, attempts=1)
async def stop():
hm = graph.channels[('dave', 'carol')].hm
while len(hm.htlcs(LOCAL)) == 0 or len(hm.htlcs(REMOTE)) == 0:
await asyncio.sleep(0.1)
self.assertTrue(len(hm.htlcs(LOCAL)) > 0)
self.assertTrue(len(hm.htlcs(REMOTE)) > 0)
await graph.workers['dave'].stop()
# Dave is supposed to have failed the pending incomplete MPP HTLCs
self.assertEqual(0, len(hm.htlcs(LOCAL)))
self.assertEqual(0, len(hm.htlcs(REMOTE)))
raise SuccessfulTest()
async def f():
async with OldTaskGroup() as group:
for peer in peers:
await group.spawn(peer._message_loop())
await group.spawn(peer.htlc_switch())
for peer in peers:
await peer.initialized
await group.spawn(pay())
await group.spawn(stop())
with self.assertRaises(SuccessfulTest):
await f()
async def _run_trampoline_payment(
self, graph, *,
include_routing_hints=True,
test_hold_invoice=False,
test_failure=False,
attempts=2):
bob_w = graph.workers['bob']
carol_w = graph.workers['carol']
dave_w = graph.workers['dave']
async def pay(lnaddr, pay_req):
self.assertEqual(PR_UNPAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash))
result, log = await graph.workers['alice'].pay_invoice(pay_req, attempts=attempts)
if result:
self.assertEqual(PR_PAID, graph.workers['dave'].get_payment_status(lnaddr.paymenthash))
self.assertFalse(bool(bob_w.active_forwardings))
self.assertFalse(bool(carol_w.active_forwardings))
raise PaymentDone()
else:
raise NoPathFound()
async def f():
await self._activate_trampoline(graph.workers['alice'])
async with OldTaskGroup() as group:
for peer in peers:
await group.spawn(peer._message_loop())
await group.spawn(peer.htlc_switch())
for peer in peers:
await peer.initialized
lnaddr, pay_req = self.prepare_invoice(dave_w, include_routing_hints=include_routing_hints)
self.prepare_recipient(dave_w, lnaddr.paymenthash, test_hold_invoice, test_failure)
await group.spawn(pay(lnaddr, pay_req))
peers = graph.peers.values()
# declare routing nodes as trampoline nodes
electrum.trampoline._TRAMPOLINE_NODES_UNITTESTS = {
graph.workers['bob'].name: LNPeerAddr(host="127.0.0.1", port=9735, pubkey=graph.workers['bob'].node_keypair.pubkey),
graph.workers['carol'].name: LNPeerAddr(host="127.0.0.1", port=9735, pubkey=graph.workers['carol'].node_keypair.pubkey),
}
await f()
def create_square_graph(self, *, direct=False, test_mpp_consolidation=False, is_legacy=False):
graph_definition = self.GRAPH_DEFINITIONS['square_graph']
if not direct:
# deplete channel from alice to carol and from bob to dave
graph_definition['alice']['channels']['carol'] = depleted_channel
graph_definition['bob']['channels']['dave'] = depleted_channel
# insert a channel from bob to carol
graph_definition['bob']['channels']['carol'] = low_fee_channel
# now the only route possible is alice -> bob -> carol -> dave
if test_mpp_consolidation:
# deplete alice to carol so that all htlcs go through bob
graph_definition['alice']['channels']['carol'] = depleted_channel
graph = self.prepare_chans_and_peers_in_graph(graph_definition)
if test_mpp_consolidation:
graph.workers['dave'].features |= LnFeatures.BASIC_MPP_OPT
graph.workers['alice'].network.config.TEST_FORCE_MPP = True
if is_legacy:
# turn off trampoline features in invoice
graph.workers['dave'].features = graph.workers['dave'].features ^ LnFeatures.OPTION_TRAMPOLINE_ROUTING_OPT_ELECTRUM
return graph
async def test_trampoline_mpp_consolidation(self):
with self.assertRaises(PaymentDone):
graph = self.create_square_graph(direct=False, test_mpp_consolidation=True, is_legacy=True)
await self._run_trampoline_payment(graph)
async def test_trampoline_mpp_consolidation_with_hold_invoice(self):
with self.assertRaises(PaymentDone):
graph = self.create_square_graph(direct=False, test_mpp_consolidation=True, is_legacy=True)
await self._run_trampoline_payment(graph, test_hold_invoice=True)
async def test_trampoline_mpp_consolidation_with_hold_invoice_failure(self):
with self.assertRaises(NoPathFound):
graph = self.create_square_graph(direct=False, test_mpp_consolidation=True, is_legacy=True)
await self._run_trampoline_payment(graph, test_hold_invoice=True, test_failure=True)
async def test_payment_trampoline_legacy(self):
with self.assertRaises(PaymentDone):
graph = self.create_square_graph(direct=False, is_legacy=True)
await self._run_trampoline_payment(graph, include_routing_hints=True)
with self.assertRaises(NoPathFound):
graph = self.create_square_graph(direct=False, is_legacy=True)
await self._run_trampoline_payment(graph, include_routing_hints=False)
async def test_payment_trampoline_e2e_direct(self):
with self.assertRaises(PaymentDone):
graph = self.create_square_graph(direct=True, is_legacy=False)
await self._run_trampoline_payment(graph)
async def test_payment_trampoline_e2e_indirect(self):
# must use two trampolines
with self.assertRaises(PaymentDone):
graph = self.create_square_graph(direct=False, is_legacy=False)
await self._run_trampoline_payment(graph)
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