def reparse(testnet=True):
"""Reparse all transaction from the database, create a new blockchain and compare it to the old one."""
options = dict(SCHPARTYD_OPTIONS)
server.initialise(database_file=':memory:', testnet=testnet, **options)
if testnet:
config.PREFIX = b'TESTXXXX'
logger = logging.getLogger()
console = logging.StreamHandler()
console.setLevel(logging.INFO)
formatter = logging.Formatter('%(message)s')
console.setFormatter(formatter)
logger.addHandler(console)
memory_db = database.get_connection(read_only=False)
initialise_db(memory_db)
data_dir = appdirs.user_data_dir(appauthor=config.SHP_NAME, appname=config.APP_NAME, roaming=True)
prod_db_path = os.path.join(data_dir, '{}{}.db'.format(config.APP_NAME, '.testnet' if testnet else ''))
prod_db = apsw.Connection(prod_db_path)
prod_db.setrowtrace(database.rowtracer)
with memory_db.backup("main", prod_db, "main") as backup:
backup.step()
# Here we don’t use block.reparse() because it reparse db in transaction (`with db`).
memory_cursor = memory_db.cursor()
for table in blocks.TABLES + ['balances']:
memory_cursor.execute('''DROP TABLE IF EXISTS {}'''.format(table))
# Check that all checkpoint blocks are in the database to be tested.
if testnet:
CHECKPOINTS = check.CHECKPOINTS_TESTNET
else:
CHECKPOINTS = check.CHECKPOINTS_MAINNET
for block_index in CHECKPOINTS.keys():
block_exists = bool(list(memory_cursor.execute('''SELECT * FROM blocks WHERE block_index = ?''', (block_index,))))
assert block_exists
# Clean consensus hashes if first block hash don’t match with checkpoint.
checkpoints = check.CHECKPOINTS_TESTNET if config.TESTNET else check.CHECKPOINTS_MAINNET
columns = [column['name'] for column in memory_cursor.execute('''PRAGMA table_info(blocks)''')]
for field in ['ledger_hash', 'txlist_hash']:
if field in columns:
sql = '''SELECT {} FROM blocks WHERE block_index = ?'''.format(field)
first_hash = list(memory_cursor.execute(sql, (config.BLOCK_FIRST,)))[0][field]
if first_hash != checkpoints[config.BLOCK_FIRST][field]:
logger.info('First hash changed. Cleaning {}.'.format(field))
memory_cursor.execute('''UPDATE blocks SET {} = NULL'''.format(field))
blocks.initialise(memory_db)
previous_ledger_hash = None
previous_txlist_hash = None
memory_cursor.execute('''SELECT * FROM blocks ORDER BY block_index''')
for block in memory_cursor.fetchall():
try:
logger.info('Block (re‐parse): {}'.format(str(block['block_index'])))
util.CURRENT_BLOCK_INDEX = block['block_index'] # TODO: Correct?!
previous_ledger_hash, previous_txlist_hash = blocks.parse_block(memory_db, block['block_index'], block['block_time'],
previous_ledger_hash, block['ledger_hash'],
previous_txlist_hash, block['txlist_hash'])
except check.ConsensusError as e:
message = str(e)
if message.find('ledger_hash') != -1:
new_ledger = get_block_ledger(memory_db, block['block_index'])
old_ledger = get_block_ledger(prod_db, block['block_index'])
compare_strings(old_ledger, new_ledger)
elif message.find('txlist_hash') != -1:
new_txlist = get_block_txlist(memory_db, block['block_index'])
old_txlist = get_block_txlist(prod_db, block['block_index'])
compare_strings(old_txlist, new_txlist)
raise(e)
def initialise_db(db):
"""Initialise blockchain in the db and insert first block."""
blocks.initialise(db)
insert_block(db, config.BURN_START - 1)
