def test_payment_below_min_part_size(self):
amount = mpp_split.MIN_PART_MSAT // 2
splits = mpp_split.suggest_splits(amount,
self.channels_with_funds,
exclude_single_parts=False)
# we only get four configurations that end up spending the full amount
# in a single channel
self.assertEqual(4, len(splits))
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: 500_000_000,
1: 500_000_000,
2: 0,
3: 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)
self.assertEqual({
0: 798_000_000,
1: 0,
2: 302_000_000,
3: 0
}, splits[0][0])
self.assertEqual({
0: 908_000_000,
1: 0,
2: 192_000_000,
3: 0
}, splits[1][0])
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])
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]))