def GenesisBlock():
"""
Create the GenesisBlock.
Returns:
BLock:
"""
prev_hash = UInt256(data=bytearray(32))
timestamp = int(
datetime(2016, 7, 15, 15, 8, 21, tzinfo=pytz.utc).timestamp())
index = 0
consensus_data = 2083236893 # 向比特币致敬 ( Pay Tribute To Bitcoin )
next_consensus = Blockchain.GetConsensusAddress(
Blockchain.StandbyValidators())
script = Witness(bytearray(0), bytearray(PUSHT))
mt = MinerTransaction()
mt.Nonce = 2083236893
output = TransactionOutput(
Blockchain.SystemShare().Hash,
Blockchain.SystemShare().Amount,
Crypto.ToScriptHash(
Contract.CreateMultiSigRedeemScript(
int(len(Blockchain.StandbyValidators()) / 2) + 1,
Blockchain.StandbyValidators())))
it = IssueTransaction([], [output], [], [script])
return Block(
prev_hash, timestamp, index, consensus_data, next_consensus,
script,
[mt, Blockchain.SystemShare(),
Blockchain.SystemCoin(), it], True)
def test_testnet797966(self):
path = '%s/fixtures/797966.txt' % os.getcwd()
with open(path, 'rb') as f:
blockraw = f.read().strip()
hex = binascii.unhexlify(blockraw)
block = Helper.AsSerializableWithType(hex, 'neo.Core.Block.Block')
trimmed = block.Trim()
trimmed_unhex = binascii.unhexlify(trimmed)
blockfrom_trimmed = Block.FromTrimmedData(trimmed_unhex)
self.assertEqual(blockfrom_trimmed.Version, block.Version)
self.assertEqual(blockfrom_trimmed.Index, block.Index)
self.assertEqual(blockfrom_trimmed.PrevHash, block.PrevHash)
self.assertEqual(blockfrom_trimmed.MerkleRoot, block.MerkleRoot)
self.assertEqual(blockfrom_trimmed.Timestamp, block.Timestamp)
self.assertEqual(blockfrom_trimmed.Index, block.Index)
self.assertEqual(blockfrom_trimmed.ConsensusData,
block.ConsensusData)
self.assertEqual(blockfrom_trimmed.NextConsensus,
block.NextConsensus)
self.assertEqual(len(block.Transactions),
len(blockfrom_trimmed.Transactions))
def GetBlockByHash(self, hash):
try:
out = bytearray(self._db.get(DBPrefix.DATA_Block + hash))
out = out[8:]
outhex = binascii.unhexlify(out)
return Block.FromTrimmedData(outhex)
except Exception as e:
logger.info("Could not get block %s " % e)
return None
def main():
parser = argparse.ArgumentParser()
parser.add_argument("-m",
"--mainnet",
action="store_true",
default=False,
help="use MainNet instead of the default TestNet")
parser.add_argument("-c",
"--config",
action="store",
help="Use a specific config file")
# Where to store stuff
parser.add_argument("--datadir",
action="store",
help="Absolute path to use for database directories")
parser.add_argument("-i", "--input", help="Where the input file lives")
parser.add_argument("-t",
"--totalblocks",
help="Total blocks to import",
type=int)
parser.add_argument("-l",
"--logevents",
help="Log Smart Contract Events",
default=False,
action="store_true")
args = parser.parse_args()
if args.mainnet and args.config:
print(
"Cannot use both --config and --mainnet parameters, please use only one."
)
exit(1)
# Setting the datadir must come before setting the network, else the wrong path is checked at net setup.
if args.datadir:
settings.set_data_dir(args.datadir)
# Setup depending on command line arguments. By default, the testnet settings are already loaded.
if args.config:
settings.setup(args.config)
elif args.mainnet:
settings.setup_mainnet()
if args.logevents:
settings.log_smart_contract_events = True
if not args.input:
raise Exception("Please specify an input path")
file_path = args.input
with open(file_path, 'rb') as file:
total_blocks = int.from_bytes(file.read(4), 'little')
target_dir = os.path.join(settings.DATA_DIR_PATH,
settings.LEVELDB_PATH)
notif_target_dir = os.path.join(settings.DATA_DIR_PATH,
settings.NOTIFICATION_DB_PATH)
print("Will import %s blocks to %s" % (total_blocks, target_dir))
print(
"This will overwrite any data currently in %s and %s.\nType 'confirm' to continue"
% (target_dir, notif_target_dir))
confirm = prompt("[confirm]> ", is_password=False)
if not confirm == 'confirm':
print("Cancelled operation")
return False
try:
if os.path.exists(target_dir):
shutil.rmtree(target_dir)
if os.path.exists(notif_target_dir):
shutil.rmtree(notif_target_dir)
except Exception as e:
print("Could not remove existing data %s " % e)
return False
# Instantiate the blockchain and subscribe to notifications
blockchain = LevelDBBlockchain(settings.chain_leveldb_path)
Blockchain.RegisterBlockchain(blockchain)
chain = Blockchain.Default()
for index in trange(total_blocks,
desc='Importing Blocks',
unit=' Block'):
block_len = int.from_bytes(file.read(4), 'little')
stream = StreamManager.GetStream(file.read(block_len))
reader = BinaryReader(stream)
block = Block()
block.Deserialize(reader)
StreamManager.ReleaseStream(stream)
if block.Index > 0:
chain.AddBlockDirectly(block)
file.close()
print("Imported %s blocks to %s " % (total_blocks, target_dir))
def main():
parser = argparse.ArgumentParser()
parser.add_argument("-m",
"--mainnet",
action="store_true",
default=False,
help="use MainNet instead of the default TestNet")
parser.add_argument("-c",
"--config",
action="store",
help="Use a specific config file")
# Where to store stuff
parser.add_argument("--datadir",
action="store",
help="Absolute path to use for database directories")
parser.add_argument("-i", "--input", help="Where the input file lives")
parser.add_argument("-t",
"--totalblocks",
help="Total blocks to import",
type=int)
parser.add_argument("-l",
"--logevents",
help="Log Smart Contract Events",
default=False,
action="store_true")
parser.add_argument("-n",
"--notifications",
help="Persist Notifications to database",
default=False,
action="store_true")
parser.add_argument("-a",
"--append",
action="store_true",
default=False,
help="Append to current Block database")
args = parser.parse_args()
if args.mainnet and args.config:
print(
"Cannot use both --config and --mainnet parameters, please use only one."
)
exit(1)
# Setting the datadir must come before setting the network, else the wrong path is checked at net setup.
if args.datadir:
settings.set_data_dir(args.datadir)
# Setup depending on command line arguments. By default, the testnet settings are already loaded.
if args.config:
settings.setup(args.config)
elif args.mainnet:
settings.setup_mainnet()
if args.logevents:
settings.log_smart_contract_events = True
if not args.input:
raise Exception("Please specify an input path")
file_path = args.input
append = False
store_notifications = False
start_block = 0
if args.append:
append = True
if args.notifications:
store_notifications = True
header_hash_list = []
with open(file_path, 'rb') as file_input:
total_blocks_available = int.from_bytes(file_input.read(4), 'little')
if total_blocks_available == 0:
total_blocks_available = int.from_bytes(file_input.read(4),
'little')
total_blocks = total_blocks_available
if args.totalblocks and args.totalblocks < total_blocks and args.totalblocks > 0:
total_blocks = args.totalblocks
target_dir = os.path.join(settings.DATA_DIR_PATH,
settings.LEVELDB_PATH)
notif_target_dir = os.path.join(settings.DATA_DIR_PATH,
settings.NOTIFICATION_DB_PATH)
if append:
blockchain = LevelDBBlockchain(settings.chain_leveldb_path,
skip_header_check=True)
Blockchain.RegisterBlockchain(blockchain)
start_block = Blockchain.Default().Height
print("Starting import at %s " % start_block)
else:
print("Will import %s of %s blocks to %s" %
(total_blocks, total_blocks_available, target_dir))
print(
"This will overwrite any data currently in %s and %s.\nType 'confirm' to continue"
% (target_dir, notif_target_dir))
try:
confirm = prompt("[confirm]> ", is_password=False)
except KeyboardInterrupt:
confirm = False
if not confirm == 'confirm':
print("Cancelled operation")
return False
try:
if os.path.exists(target_dir):
shutil.rmtree(target_dir)
if os.path.exists(notif_target_dir):
shutil.rmtree(notif_target_dir)
except Exception as e:
print("Could not remove existing data %s " % e)
return False
# Instantiate the blockchain and subscribe to notifications
blockchain = LevelDBBlockchain(settings.chain_leveldb_path)
Blockchain.RegisterBlockchain(blockchain)
chain = Blockchain.Default()
if store_notifications:
NotificationDB.instance().start()
stream = MemoryStream()
reader = BinaryReader(stream)
block = Block()
length_ba = bytearray(4)
for index in trange(total_blocks,
desc='Importing Blocks',
unit=' Block'):
# set stream data
file_input.readinto(length_ba)
block_len = int.from_bytes(length_ba, 'little')
reader.stream.write(file_input.read(block_len))
reader.stream.seek(0)
# get block
block.DeserializeForImport(reader)
header_hash_list.append(block.Hash.ToBytes())
# add
if block.Index > start_block:
chain.AddBlockDirectly(block,
do_persist_complete=store_notifications)
# reset blockheader
block._header = None
block.__hash = None
# reset stream
reader.stream.Cleanup()
print("Wrote blocks. Now writing headers")
chain = Blockchain.Default()
# reset header hash list
chain._db.delete(DBPrefix.IX_HeaderHashList)
total = len(header_hash_list)
chain._header_index = header_hash_list
print("storing header hash list...")
while total - 2000 >= chain._stored_header_count:
ms = StreamManager.GetStream()
w = BinaryWriter(ms)
headers_to_write = chain._header_index[chain._stored_header_count:chain
._stored_header_count + 2000]
w.Write2000256List(headers_to_write)
out = ms.ToArray()
StreamManager.ReleaseStream(ms)
with chain._db.write_batch() as wb:
wb.put(
DBPrefix.IX_HeaderHashList +
chain._stored_header_count.to_bytes(4, 'little'), out)
chain._stored_header_count += 2000
last_index = len(header_hash_list)
chain._db.put(DBPrefix.SYS_CurrentHeader,
header_hash_list[-1] + last_index.to_bytes(4, 'little'))
print("Imported %s blocks to %s " % (total_blocks, target_dir))