def test_encode_decode_msg__missing_optional_field_will_not_appear_in_decoded_dict(
self):
# "channel_update": optional field "htlc_maximum_msat" missing -> does not get put into dict
self.assertEqual(
bfh("01020000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000043497fd7f826957108f4a30fd9cec3aeba79972084e90ead01ea33090000000000d43100006f00025e6ed0830100009000000000000000c8000001f400000023"
),
encode_msg(
"channel_update",
short_channel_id=ShortChannelID.from_components(54321, 111, 2),
channel_flags=b'\x00',
message_flags=b'\x01',
cltv_expiry_delta=144,
htlc_minimum_msat=200,
fee_base_msat=500,
fee_proportional_millionths=35,
chain_hash=constants.net.rev_genesis_bytes(),
timestamp=1584320643,
))
self.assertEqual(
('channel_update', {
'chain_hash':
b'CI\x7f\xd7\xf8&\x95q\x08\xf4\xa3\x0f\xd9\xce\xc3\xae\xbay\x97 \x84\xe9\x0e\xad\x01\xea3\t\x00\x00\x00\x00',
'channel_flags': b'\x00',
'cltv_expiry_delta': 144,
'fee_base_msat': 500,
'fee_proportional_millionths': 35,
'htlc_minimum_msat': 200,
'message_flags': b'\x01',
'short_channel_id': b'\x00\xd41\x00\x00o\x00\x02',
'signature': bytes(64),
'timestamp': 1584320643
}),
decode_msg(
bfh("01020000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000043497fd7f826957108f4a30fd9cec3aeba79972084e90ead01ea33090000000000d43100006f00025e6ed0830100009000000000000000c8000001f400000023"
)))
def test_encode_decode_msg__ints_can_be_passed_as_bytes(self):
self.assertEqual(
bfh("01020000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000043497fd7f826957108f4a30fd9cec3aeba79972084e90ead01ea33090000000000d43100006f00025e6ed0830100009000000000000000c8000001f400000023000000003b9aca00"
),
encode_msg(
"channel_update",
short_channel_id=ShortChannelID.from_components(54321, 111, 2),
channel_flags=b'\x00',
message_flags=b'\x01',
cltv_expiry_delta=int.to_bytes(144,
length=2,
byteorder="big",
signed=False),
htlc_minimum_msat=int.to_bytes(200,
length=8,
byteorder="big",
signed=False),
htlc_maximum_msat=int.to_bytes(1_000_000_000,
length=8,
byteorder="big",
signed=False),
fee_base_msat=int.to_bytes(500,
length=4,
byteorder="big",
signed=False),
fee_proportional_millionths=int.to_bytes(35,
length=4,
byteorder="big",
signed=False),
chain_hash=constants.net.rev_genesis_bytes(),
timestamp=int.to_bytes(1584320643,
length=4,
byteorder="big",
signed=False),
))
def test_encode_decode_msg__missing_mandatory_field_gets_set_to_zeroes(self):
# "channel_update": "signature" missing -> gets set to zeroes
self.assertEqual(bfh(frombtc("01020000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000043497fd7f826957108f4a30fd9cec3aeba79972084e90ead01ea33090000000000d43100006f00025e6ed0830100009000000000000000c8000001f400000023000000003b9aca00")),
encode_msg(
"channel_update",
short_channel_id=ShortChannelID.from_components(54321, 111, 2),
channel_flags=b'\x00',
message_flags=b'\x01',
cltv_expiry_delta=144,
htlc_minimum_msat=200,
htlc_maximum_msat=1_000_000_000,
fee_base_msat=500,
fee_proportional_millionths=35,
chain_hash=constants.net.rev_genesis_bytes(),
timestamp=1584320643,
))
def test_liquidity_hints(self):
liquidity_hints = LiquidityHintMgr()
node_from = bytes(0)
node_to = bytes(1)
channel_id = ShortChannelID.from_components(0, 0, 0)
amount_to_send = 1_000_000
# check default penalty
self.assertEqual(
fee_for_edge_msat(amount_to_send, DEFAULT_PENALTY_BASE_MSAT,
DEFAULT_PENALTY_PROPORTIONAL_MILLIONTH),
liquidity_hints.penalty(node_from, node_to, channel_id,
amount_to_send))
liquidity_hints.update_can_send(node_from, node_to, channel_id,
1_000_000)
liquidity_hints.update_cannot_send(node_from, node_to, channel_id,
2_000_000)
hint = liquidity_hints.get_hint(channel_id)
self.assertEqual(1_000_000, hint.can_send(node_from < node_to))
self.assertEqual(None, hint.cannot_send(node_to < node_from))
self.assertEqual(2_000_000, hint.cannot_send(node_from < node_to))
# the can_send backward hint is set automatically
self.assertEqual(2_000_000, hint.can_send(node_to < node_from))
# check penalties
self.assertEqual(
0.,
liquidity_hints.penalty(node_from, node_to, channel_id, 1_000_000))
self.assertEqual(
650,
liquidity_hints.penalty(node_from, node_to, channel_id, 1_500_000))
self.assertEqual(
inf,
liquidity_hints.penalty(node_from, node_to, channel_id, 2_000_000))
# test that we don't overwrite significant info with less significant info
liquidity_hints.update_can_send(node_from, node_to, channel_id,
500_000)
hint = liquidity_hints.get_hint(channel_id)
self.assertEqual(1_000_000, hint.can_send(node_from < node_to))
# test case when can_send > cannot_send
liquidity_hints.update_can_send(node_from, node_to, channel_id,
3_000_000)
hint = liquidity_hints.get_hint(channel_id)
self.assertEqual(3_000_000, hint.can_send(node_from < node_to))
self.assertEqual(None, hint.cannot_send(node_from < node_to))
def test_read_tlv_stream_tests2(self):
# from https://github.com/lightningnetwork/lightning-rfc/blob/452a0eb916fedf4c954137b4fd0b61b5002b34ad/01-messaging.md#tlv-decoding-successes
lnser = LNSerializer()
for tlv_stream_name in ("n1", "n2"):
with self.subTest(tlv_stream_name=tlv_stream_name):
self.assertEqual({}, lnser.read_tlv_stream(fd=io.BytesIO(bfh("")), tlv_stream_name=tlv_stream_name))
self.assertEqual({}, lnser.read_tlv_stream(fd=io.BytesIO(bfh("2100")), tlv_stream_name=tlv_stream_name))
self.assertEqual({}, lnser.read_tlv_stream(fd=io.BytesIO(bfh("fd020100")), tlv_stream_name=tlv_stream_name))
self.assertEqual({}, lnser.read_tlv_stream(fd=io.BytesIO(bfh("fd00fd00")), tlv_stream_name=tlv_stream_name))
self.assertEqual({}, lnser.read_tlv_stream(fd=io.BytesIO(bfh("fd00ff00")), tlv_stream_name=tlv_stream_name))
self.assertEqual({}, lnser.read_tlv_stream(fd=io.BytesIO(bfh("fe0200000100")), tlv_stream_name=tlv_stream_name))
self.assertEqual({}, lnser.read_tlv_stream(fd=io.BytesIO(bfh("ff020000000000000100")), tlv_stream_name=tlv_stream_name))
self.assertEqual({"tlv1": {"amount_msat": 0}},
lnser.read_tlv_stream(fd=io.BytesIO(bfh("0100")), tlv_stream_name="n1"))
self.assertEqual({"tlv1": {"amount_msat": 1}},
lnser.read_tlv_stream(fd=io.BytesIO(bfh("010101")), tlv_stream_name="n1"))
self.assertEqual({"tlv1": {"amount_msat": 256}},
lnser.read_tlv_stream(fd=io.BytesIO(bfh("01020100")), tlv_stream_name="n1"))
self.assertEqual({"tlv1": {"amount_msat": 65536}},
lnser.read_tlv_stream(fd=io.BytesIO(bfh("0103010000")), tlv_stream_name="n1"))
self.assertEqual({"tlv1": {"amount_msat": 16777216}},
lnser.read_tlv_stream(fd=io.BytesIO(bfh("010401000000")), tlv_stream_name="n1"))
self.assertEqual({"tlv1": {"amount_msat": 4294967296}},
lnser.read_tlv_stream(fd=io.BytesIO(bfh("01050100000000")), tlv_stream_name="n1"))
self.assertEqual({"tlv1": {"amount_msat": 1099511627776}},
lnser.read_tlv_stream(fd=io.BytesIO(bfh("0106010000000000")), tlv_stream_name="n1"))
self.assertEqual({"tlv1": {"amount_msat": 281474976710656}},
lnser.read_tlv_stream(fd=io.BytesIO(bfh("010701000000000000")), tlv_stream_name="n1"))
self.assertEqual({"tlv1": {"amount_msat": 72057594037927936}},
lnser.read_tlv_stream(fd=io.BytesIO(bfh("01080100000000000000")), tlv_stream_name="n1"))
self.assertEqual({"tlv2": {"scid": ShortChannelID.from_components(0, 0, 550)}},
lnser.read_tlv_stream(fd=io.BytesIO(bfh("02080000000000000226")), tlv_stream_name="n1"))
self.assertEqual({"tlv3": {"node_id": bfh("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb"),
"amount_msat_1": 1,
"amount_msat_2": 2}},
lnser.read_tlv_stream(fd=io.BytesIO(bfh("0331023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb00000000000000010000000000000002")), tlv_stream_name="n1"))
self.assertEqual({"tlv4": {"cltv_delta": 550}},
lnser.read_tlv_stream(fd=io.BytesIO(bfh("fd00fe020226")), tlv_stream_name="n1"))
'fee_proportional_millionths': 35,
'htlc_maximum_msat': 1000000000,
'htlc_minimum_msat': 200,
'message_flags': b'\x01',
'short_channel_id': b'\x00\xd41\x00\x00o\x00\x02',
'signature': bytes(64),
'timestamp': 1584320643
}),
decode_msg(
bfh("01020000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000043497fd7f826957108f4a30fd9cec3aeba79972084e90ead01ea33090000000000d43100006f00025e6ed0830100009000000000000000c8000001f400000023000000003b9aca00"
)))
# "htlc_minimum_msat" is passed as bytes but with incorrect length
with self.assertRaises(UnexpectedFieldSizeForEncoder):
encode_msg(
"channel_update",
short_channel_id=ShortChannelID.from_components(54321, 111, 2),
channel_flags=b'\x00',
message_flags=b'\x01',
cltv_expiry_delta=int.to_bytes(144,
length=2,
byteorder="big",
signed=False),
htlc_minimum_msat=int.to_bytes(200,
length=4,
byteorder="big",
signed=False),
htlc_maximum_msat=int.to_bytes(1_000_000_000,
length=8,
byteorder="big",
signed=False),
fee_base_msat=int.to_bytes(500,
def channel(number: int) -> ShortChannelID:
return ShortChannelID(bfh(format(number, '016x')))