import unittest
import tempfile
import shutil
from lbry.wallet.server.db.revertable import RevertableOpStack, RevertableDelete, RevertablePut, OpStackIntegrity
from lbry.wallet.server.db.prefixes import ClaimToTXOPrefixRow, PrefixDB
class TestRevertableOpStack(unittest.TestCase):
def setUp(self):
self.fake_db = {}
self.stack = RevertableOpStack(self.fake_db.get)
def tearDown(self) -> None:
self.stack.clear()
self.fake_db.clear()
def process_stack(self):
for op in self.stack:
if op.is_put:
self.fake_db[op.key] = op.value
else:
self.fake_db.pop(op.key)
self.stack.clear()
def update(self, key1: bytes, value1: bytes, key2: bytes, value2: bytes):
self.stack.append_op(RevertableDelete(key1, value1))
self.stack.append_op(RevertablePut(key2, value2))
def test_simplify(self):
key1 = ClaimToTXOPrefixRow.pack_key(b'\x01' * 20)
key2 = ClaimToTXOPrefixRow.pack_key(b'\x02' * 20)
key3 = ClaimToTXOPrefixRow.pack_key(b'\x03' * 20)
key4 = ClaimToTXOPrefixRow.pack_key(b'\x04' * 20)
val1 = ClaimToTXOPrefixRow.pack_value(1, 0, 1, 0, 1, False, 'derp')
val2 = ClaimToTXOPrefixRow.pack_value(1, 0, 1, 0, 1, False, 'oops')
val3 = ClaimToTXOPrefixRow.pack_value(1, 0, 1, 0, 1, False, 'other')
# check that we can't delete a non existent value
with self.assertRaises(OpStackIntegrity):
self.stack.append_op(RevertableDelete(key1, val1))
self.stack.append_op(RevertablePut(key1, val1))
self.assertEqual(1, len(self.stack))
self.stack.append_op(RevertableDelete(key1, val1))
self.assertEqual(0, len(self.stack))
self.stack.append_op(RevertablePut(key1, val1))
self.assertEqual(1, len(self.stack))
# try to delete the wrong value
with self.assertRaises(OpStackIntegrity):
self.stack.append_op(RevertableDelete(key2, val2))
self.stack.append_op(RevertableDelete(key1, val1))
self.assertEqual(0, len(self.stack))
self.stack.append_op(RevertablePut(key2, val3))
self.assertEqual(1, len(self.stack))
self.process_stack()
self.assertDictEqual({key2: val3}, self.fake_db)
# check that we can't put on top of the existing stored value
with self.assertRaises(OpStackIntegrity):
self.stack.append_op(RevertablePut(key2, val1))
self.assertEqual(0, len(self.stack))
self.stack.append_op(RevertableDelete(key2, val3))
self.assertEqual(1, len(self.stack))
self.stack.append_op(RevertablePut(key2, val3))
self.assertEqual(0, len(self.stack))
self.update(key2, val3, key2, val1)
self.assertEqual(2, len(self.stack))
self.process_stack()
self.assertDictEqual({key2: val1}, self.fake_db)
self.update(key2, val1, key2, val2)
self.assertEqual(2, len(self.stack))
self.update(key2, val2, key2, val3)
self.update(key2, val3, key2, val2)
self.update(key2, val2, key2, val3)
self.update(key2, val3, key2, val2)
with self.assertRaises(OpStackIntegrity):
self.update(key2, val3, key2, val2)
self.update(key2, val2, key2, val3)
self.assertEqual(2, len(self.stack))
self.stack.append_op(RevertableDelete(key2, val3))
self.process_stack()
self.assertDictEqual({}, self.fake_db)
self.stack.append_op(RevertablePut(key2, val3))
self.process_stack()
with self.assertRaises(OpStackIntegrity):
self.update(key2, val2, key2, val2)
self.update(key2, val3, key2, val2)
self.assertDictEqual({key2: val3}, self.fake_db)
undo = self.stack.get_undo_ops()
self.process_stack()
self.assertDictEqual({key2: val2}, self.fake_db)
self.stack.apply_packed_undo_ops(undo)
self.process_stack()
self.assertDictEqual({key2: val3}, self.fake_db)
class TestRevertablePrefixDB(unittest.TestCase):
def setUp(self):
self.tmp_dir = tempfile.mkdtemp()
self.db = PrefixDB(self.tmp_dir, cache_mb=1, max_open_files=32)
def tearDown(self) -> None:
self.db.close()
shutil.rmtree(self.tmp_dir)
def test_rollback(self):
name = 'derp'
claim_hash1 = 20 * b'\x00'
claim_hash2 = 20 * b'\x01'
claim_hash3 = 20 * b'\x02'
takeover_height = 10000000
self.assertIsNone(self.db.claim_takeover.get(name))
self.db.claim_takeover.stage_put((name,), (claim_hash1, takeover_height))
self.assertIsNone(self.db.claim_takeover.get(name))
self.assertEqual(10000000, self.db.claim_takeover.get_pending(name).height)
self.db.commit(10000000, b'\x00' * 32)
self.assertEqual(10000000, self.db.claim_takeover.get(name).height)
self.db.claim_takeover.stage_delete((name,), (claim_hash1, takeover_height))
self.db.claim_takeover.stage_put((name,), (claim_hash2, takeover_height + 1))
self.db.claim_takeover.stage_delete((name,), (claim_hash2, takeover_height + 1))
self.db.commit(10000001, b'\x01' * 32)
self.assertIsNone(self.db.claim_takeover.get(name))
self.db.claim_takeover.stage_put((name,), (claim_hash3, takeover_height + 2))
self.db.commit(10000002, b'\x02' * 32)
self.assertEqual(10000002, self.db.claim_takeover.get(name).height)
self.db.claim_takeover.stage_delete((name,), (claim_hash3, takeover_height + 2))
self.db.claim_takeover.stage_put((name,), (claim_hash2, takeover_height + 3))
self.db.commit(10000003, b'\x03' * 32)
self.assertEqual(10000003, self.db.claim_takeover.get(name).height)
self.db.rollback(10000003, b'\x03' * 32)
self.assertEqual(10000002, self.db.claim_takeover.get(name).height)
self.db.rollback(10000002, b'\x02' * 32)
self.assertIsNone(self.db.claim_takeover.get(name))
self.db.rollback(10000001, b'\x01' * 32)
self.assertEqual(10000000, self.db.claim_takeover.get(name).height)
self.db.rollback(10000000, b'\x00' * 32)
self.assertIsNone(self.db.claim_takeover.get(name))
def test_hub_db_iterator(self):
name = 'derp'
claim_hash0 = 20 * b'\x00'
claim_hash1 = 20 * b'\x01'
claim_hash2 = 20 * b'\x02'
claim_hash3 = 20 * b'\x03'
overflow_value = 0xffffffff
self.db.claim_expiration.stage_put((99, 999, 0), (claim_hash0, name))
self.db.claim_expiration.stage_put((100, 1000, 0), (claim_hash1, name))
self.db.claim_expiration.stage_put((100, 1001, 0), (claim_hash2, name))
self.db.claim_expiration.stage_put((101, 1002, 0), (claim_hash3, name))
self.db.claim_expiration.stage_put((overflow_value - 1, 1003, 0), (claim_hash3, name))
self.db.claim_expiration.stage_put((overflow_value, 1004, 0), (claim_hash3, name))
self.db.tx_num.stage_put((b'\x00' * 32,), (101,))
self.db.claim_takeover.stage_put((name,), (claim_hash3, 101))
self.db.db_state.stage_put((), (b'n?\xcf\x12\x99\xd4\xec]y\xc3\xa4\xc9\x1dbJJ\xcf\x9e.\x17=\x95\xa1\xa0POgvihuV', 0, 1, b'VuhivgOP\xa0\xa1\x95=\x17.\x9e\xcfJJb\x1d\xc9\xa4\xc3y]\xec\xd4\x99\x12\xcf?n', 1, 0, 1, 7, 1, -1, -1, 0))
self.db.unsafe_commit()
state = self.db.db_state.get()
self.assertEqual(b'n?\xcf\x12\x99\xd4\xec]y\xc3\xa4\xc9\x1dbJJ\xcf\x9e.\x17=\x95\xa1\xa0POgvihuV', state.genesis)
self.assertListEqual(
[], list(self.db.claim_expiration.iterate(prefix=(98,)))
)
self.assertListEqual(
list(self.db.claim_expiration.iterate(start=(98,), stop=(99,))),
list(self.db.claim_expiration.iterate(prefix=(98,)))
)
self.assertListEqual(
list(self.db.claim_expiration.iterate(start=(99,), stop=(100,))),
list(self.db.claim_expiration.iterate(prefix=(99,)))
)
self.assertListEqual(
[
((99, 999, 0), (claim_hash0, name)),
], list(self.db.claim_expiration.iterate(prefix=(99,)))
)
self.assertListEqual(
[
((100, 1000, 0), (claim_hash1, name)),
((100, 1001, 0), (claim_hash2, name))
], list(self.db.claim_expiration.iterate(prefix=(100,)))
)
self.assertListEqual(
list(self.db.claim_expiration.iterate(start=(100,), stop=(101,))),
list(self.db.claim_expiration.iterate(prefix=(100,)))
)
self.assertListEqual(
[
((overflow_value - 1, 1003, 0), (claim_hash3, name))
], list(self.db.claim_expiration.iterate(prefix=(overflow_value - 1,)))
)
self.assertListEqual(
[
((overflow_value, 1004, 0), (claim_hash3, name))
], list(self.db.claim_expiration.iterate(prefix=(overflow_value,)))
)
def test_hub_db_iterator_start_stop(self):
tx_num = 101
for x in range(255):
claim_hash = 20 * chr(x).encode()
self.db.active_amount.stage_put((claim_hash, 1, 200, tx_num, 1), (100000,))
self.db.active_amount.stage_put((claim_hash, 1, 201, tx_num + 1, 1), (200000,))
self.db.active_amount.stage_put((claim_hash, 1, 202, tx_num + 2, 1), (300000,))
tx_num += 3
self.db.unsafe_commit()
def get_active_amount_as_of_height(claim_hash: bytes, height: int) -> int:
for v in self.db.active_amount.iterate(
start=(claim_hash, 1, 0), stop=(claim_hash, 1, height + 1),
include_key=False, reverse=True):
return v.amount
return 0
for x in range(255):
claim_hash = 20 * chr(x).encode()
self.assertEqual(300000, get_active_amount_as_of_height(claim_hash, 300))
self.assertEqual(300000, get_active_amount_as_of_height(claim_hash, 203))
self.assertEqual(300000, get_active_amount_as_of_height(claim_hash, 202))
self.assertEqual(200000, get_active_amount_as_of_height(claim_hash, 201))
self.assertEqual(100000, get_active_amount_as_of_height(claim_hash, 200))
self.assertEqual(0, get_active_amount_as_of_height(claim_hash, 199))