def test_sequence(self):
sequence_0 = Sequence()
self.assertEqual(sequence_0, MAX_SEQUENCE)
self.assertTrue(sequence_0.is_max())
self.assertFalse(sequence_0.is_relative())
self.assertIsNone(sequence_0.relative_blocks())
self.assertIsNone(sequence_0.relative_time())
self.assertEqual(Sequence.parse(BytesIO(sequence_0.serialize())),
sequence_0)
time_amount = 512 * 1000
sequence_1 = Sequence.from_relative_time(time_amount)
self.assertFalse(sequence_1.is_comparable(sequence_0))
self.assertIsNone(sequence_1.relative_blocks())
self.assertEqual(sequence_1.relative_time(), time_amount)
self.assertEqual(Sequence.parse(BytesIO(sequence_1.serialize())),
sequence_1)
blocks_amount = 144
sequence_2 = Sequence.from_relative_blocks(blocks_amount)
self.assertIsNone(sequence_2.relative_time())
self.assertEqual(sequence_2.relative_blocks(), blocks_amount)
self.assertFalse(sequence_1.is_comparable(sequence_2))
sequence_3 = Sequence.from_relative_time(512 * 100)
self.assertTrue(sequence_3 < sequence_1)
with self.assertRaises(ValueError):
sequence_2 < sequence_0
with self.assertRaises(ValueError):
sequence_2 < sequence_1
with self.assertRaises(ValueError):
Sequence(-1)
with self.assertRaises(ValueError):
Sequence(1 << 32)
def degrading_multisig_tap_node(self,
sequence_block_interval=None,
sequence_time_interval=None):
"""Can unlock with multisig as k-of-n, or (k-1)-of-n after a
sequence_block_interval/sequence_time_interval amount of time,
(k-2)-of-n after 2*sequence_block_interval/sequence_time_interval
amount of time, (k-3)-of-n after 3*sequence_block_interval/
sequence_time_interval amount of time and so on."""
leaves = []
for num_keys_needed in range(self.k, 0, -1):
if num_keys_needed == self.k:
sequence = None
elif sequence_block_interval:
sequence = Sequence.from_relative_blocks(
sequence_block_interval * (self.k - num_keys_needed))
elif sequence_time_interval:
sequence = Sequence.from_relative_time(
sequence_time_interval * (self.k - num_keys_needed))
for pubkeys in combinations(self.points, num_keys_needed):
tap_script = MultiSigTapScript(pubkeys,
num_keys_needed,
sequence=sequence)
leaves.append(tap_script.tap_leaf())
return TapBranch.combine(leaves)