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mpp_split: use single nodes for mpp payments over trampoline

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bitromortac
2021-03-12 18:50:10 +01:00
parent 1ba5997238
commit 8828998093
4 changed files with 61 additions and 28 deletions
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21
electrum/tests/test_mpp_split.py
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@@ -13,11 +13,12 @@ class TestMppSplit(ElectrumTestCase):
super().setUp()
# to make tests reproducible:
random.seed(0)
# key tuple denotes (channel_id, node_id)
self.channels_with_funds = {
0: 1_000_000_000,
1: 500_000_000,
2: 302_000_000,
3: 101_000_000,
(0, 0): 1_000_000_000,
(1, 1): 500_000_000,
(2, 0): 302_000_000,
(3, 2): 101_000_000,
}
def tearDown(self):
@@ -28,7 +29,7 @@ class TestMppSplit(ElectrumTestCase):
def test_suggest_splits(self):
with self.subTest(msg="do a payment with the maximal amount spendable over a single channel"):
splits = mpp_split.suggest_splits(1_000_000_000, self.channels_with_funds, exclude_single_parts=True)
self.assertEqual({0: 660_000_000, 1: 340_000_000, 2: 0, 3: 0}, splits[0][0])
self.assertEqual({(0, 0): 660_000_000, (1, 1): 340_000_000, (2, 0): 0, (3, 2): 0}, splits[0][0])
with self.subTest(msg="do a payment with a larger amount than what is supported by a single channel"):
splits = mpp_split.suggest_splits(1_100_000_000, self.channels_with_funds, exclude_single_parts=True)
@@ -36,16 +37,22 @@ class TestMppSplit(ElectrumTestCase):
with self.subTest(msg="do a payment with the maximal amount spendable over all channels"):
splits = mpp_split.suggest_splits(sum(self.channels_with_funds.values()), self.channels_with_funds, exclude_single_parts=True)
self.assertEqual({0: 1_000_000_000, 1: 500_000_000, 2: 302_000_000, 3: 101_000_000}, splits[0][0])
self.assertEqual({(0, 0): 1_000_000_000, (1, 1): 500_000_000, (2, 0): 302_000_000, (3, 2): 101_000_000}, splits[0][0])
with self.subTest(msg="do a payment with the amount supported by all channels"):
splits = mpp_split.suggest_splits(101_000_000, self.channels_with_funds, exclude_single_parts=False)
for s in splits[:4]:
self.assertEqual(1, mpp_split.number_nonzero_parts(s[0]))
def test_send_to_single_node(self):
splits = mpp_split.suggest_splits(1_000_000_000, self.channels_with_funds, exclude_single_parts=True, single_node=True)
self.assertEqual({(0, 0): 738_000_000, (1, 1): 0, (2, 0): 262_000_000, (3, 2): 0}, splits[0][0])
for split in splits:
assert mpp_split.number_nonzero_nodes(split[0]) == 1
def test_saturation(self):
"""Split configurations which spend the full amount in a channel should be avoided."""
channels_with_funds = {0: 159_799_733_076, 1: 499_986_152_000}
channels_with_funds = {(0, 0): 159_799_733_076, (1, 1): 499_986_152_000}
splits = mpp_split.suggest_splits(600_000_000_000, channels_with_funds, exclude_single_parts=True)
uses_full_amount = False