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, HubDB 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 = HubDB(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,))) )