def _read_wallet(self):
self.address_bundle = []
if not os.path.isfile(self.wallet_dat_filename):
return
try:
with open(self.wallet_dat_filename, "rb") as infile:
wallet_store = qrl_pb2.WalletStore()
wallet_store.ParseFromString(bytes(infile.read()))
self.address_bundle = []
for a in wallet_store.wallets:
tmpxmss = XMSS(config.dev.xmss_tree_height, mnemonic2bin(a.mnemonic.strip()))
tmpxmss.set_index(a.xmss_index)
if a.address.encode() != tmpxmss.get_address():
logger.fatal("Mnemonic and address do not match.")
exit(1)
self.address_bundle.append(AddressBundle(tmpxmss.get_address(), tmpxmss))
except Exception as e:
logger.warning("It was not possible to open the wallet: %s", e)
def rollback(self, block):
hash_path = []
while True:
if self.state.state_objects.contains(block.headerhash):
break
hash_path.append(block.headerhash)
new_block = self.state.get_block(block.prev_headerhash)
if not new_block:
logger.warning('No block found %s', block.prev_headerhash)
break
block = new_block
if block.block_number == 0:
del hash_path[-1] # Skip replaying Genesis Block
break
self.state.state_objects.destroy_current_state(None)
block = self.state.get_block(hash_path[-1])
self.state.state_objects.destroy_fork_states(block.block_number, block.headerhash)
for header_hash in hash_path[-1::-1]:
block = self.state.get_block(header_hash)
address_set = self.state.prepare_address_list(block) # Prepare list for current block
address_txn = self.state.get_state_mainchain(address_set)
self.state.update_mainchain_state(address_txn, block.block_number, block.headerhash)
self.last_block = block
self._update_mainchain(block, None)
self.tx_pool.remove_tx_in_block_from_pool(block)
self.state.update_mainchain_height(block.block_number, None)
self.state.update_tx_metadata(block, None)
self.trigger_miner = True
def validate_mining_nonce(self, block, enable_logging=False):
parent_metadata = self.state.get_block_metadata(block.prev_headerhash)
parent_block = self.state.get_block(block.prev_headerhash)
input_bytes = StringToUInt256(str(block.mining_nonce))[-4:] + tuple(block.mining_hash)
measurement = self.state.get_measurement(block.timestamp, block.prev_headerhash)
diff, target = self._difficulty_tracker.get(
measurement=measurement,
parent_difficulty=parent_metadata.block_difficulty)
if enable_logging:
logger.debug('-----------------START--------------------')
logger.debug('Validate #%s', block.block_number)
logger.debug('block.timestamp %s', block.timestamp)
logger.debug('parent_block.timestamp %s', parent_block.timestamp)
logger.debug('parent_block.difficulty %s', UInt256ToString(parent_metadata.block_difficulty))
logger.debug('input_bytes %s', UInt256ToString(input_bytes))
logger.debug('diff : %s | target : %s', UInt256ToString(diff), target)
logger.debug('-------------------END--------------------')
if not PoWHelper.verifyInput(input_bytes, target):
if enable_logging:
logger.warning("PoW verification failed")
qn = Qryptonight()
tmp_hash = qn.hash(input_bytes)
logger.warning("{}".format(tmp_hash))
logger.debug('%s', block.to_json())
return False
return True
def set_addresses_state(self, addresses_state: dict, state_code: bytes):
"""
Sets the addresses_state from the latest state objects cache from or after
state_code.
:param addresses_state:
:param state_code:
:return:
"""
str_state_code = bin2hstr(state_code).encode()
index = -1
found = False
for state_object in self.state_objects.state_loaders:
index += 1
if state_object.state_code == str_state_code:
found = True
break
if not found:
logger.warning('Not Possible: State Code not found %s', str_state_code)
raise Exception
for address in addresses_state:
for state_obj_index in range(index, -1, -1):
state_object = self.state_objects.get_state_loader_by_index(state_obj_index)
addresses_state[address] = state_object.get_address(address)
if addresses_state[address]:
break
if not addresses_state[address]:
addresses_state[address] = self._get_address_state(address)
def get_mining_xmss(self):
if self._mining_xmss:
addr_state = self.state.get_address(self._mining_xmss.get_address())
if self.set_unused_ots_key(self._mining_xmss, addr_state, self._mining_xmss.get_index()):
if self.valid_mining_permission():
return self._mining_xmss
else:
self._mining_xmss = None
return None
if not self._mining_xmss:
self._master_address = self._slaves[0].encode()
unused_ots_found = False
for slave_seed in self._slaves[1]:
xmss = Wallet.get_new_address(seed=slave_seed).xmss
addr_state = self.state.get_address(xmss.get_address())
if self.set_unused_ots_key(xmss, addr_state): # Unused ots_key_found
self._mining_xmss = xmss
unused_ots_found = True
break
if not unused_ots_found: # Unused ots_key_found
logger.warning('No OTS-KEY left for mining')
return None
if self._master_address == self._mining_xmss.get_address():
return self._mining_xmss
if not self.valid_mining_permission():
return None
return self._mining_xmss
def get_state_loader_by_index(self, index) -> StateLoader:
if index >= len(self._state_loaders):
logger.warning('Index is not in range')
logger.warning('Index: %s, Len of State_loaders: %s', index, len(self._state_loaders))
raise Exception
return self._state_loaders[index]
def _parse_buffer(self, total_read):
# FIXME: This parsing/wire protocol needs to be replaced
"""
>>> from pyqrllib.pyqrllib import hstr2bin
>>> p=P2PProtocol()
>>> p._buffer = bytes(hstr2bin('000000191a170a0776657273696f6e120c67656e657369735f68617368'+ \
'000000191a170a0776657273696f6e120c67656e657369735f68617368'))
>>> messages = p._parse_buffer([0])
>>> len(list(messages))
2
"""
while self._buffer:
# FIXME: This is not the final implementation, it is just a minimal implementation for refactoring
if len(self._buffer) < 4:
# Buffer is still incomplete as it doesn't have message size
return
chunk_size_raw = self._buffer[:4]
chunk_size = struct.unpack('>L', chunk_size_raw)[0] # is m length encoded correctly?
# FIXME: There is no limitation on the buffer size or timeout
if len(self._buffer) < chunk_size:
# Buffer is still incomplete as it doesn't have message
return
try:
message_raw = self._buffer[4:4 + chunk_size]
message = qrllegacy_pb2.LegacyMessage()
message.ParseFromString(message_raw)
yield message
except Exception as e:
logger.warning("Problem parsing message. Skipping")
finally:
self._buffer = self._buffer[4 + chunk_size:]
total_read[0] += 4 + chunk_size
def _validate_custom(self):
if self.fee <= 0:
raise ValueError('TransferTokenTransaction [%s] Invalid Fee = %d', bin2hstr(self.txhash), self.fee)
if not (AddressState.address_is_valid(self.addr_from) and AddressState.address_is_valid(self.txto)):
logger.warning('Invalid address addr_from: %s addr_to: %s', self.addr_from, self.txto)
return False
return True
def _validate_custom(self):
if self.amount <= 0:
raise ValueError('[%s] Invalid amount = %d', bin2hstr(self.txhash), self.amount)
if not (AddressState.address_is_valid(self.addr_from) and AddressState.address_is_valid(self.txto)):
logger.warning('Invalid address addr_from: %s addr_to: %s', self.addr_from, self.txto)
return False
return True
def solutionEvent(self, nonce):
# NOTE: This function usually runs in the context of a C++ thread
try:
logger.debug('Solution Found %s', nonce)
self._mining_block.set_mining_nonce(nonce)
logger.info('Block #%s nonce: %s', self._mining_block.block_number, StringToUInt256(str(nonce))[-4:])
logger.info('Hash Rate: %s H/s', self.hashRate())
cloned_block = copy.deepcopy(self._mining_block)
self.pre_block_logic(cloned_block)
except Exception as e:
logger.warning("Exception in solutionEvent")
logger.exception(e)
def validate_extended(self, addr_from_state, addr_from_pk_state, transaction_pool):
if not self.validate_slave(addr_from_state, addr_from_pk_state):
return False
if self.addr_from != config.dev.coinbase_address:
return False
if not (AddressState.address_is_valid(self.addr_from) and AddressState.address_is_valid(self.txto)):
logger.warning('Invalid address addr_from: %s addr_to: %s', self.addr_from, self.txto)
return False
return self.validate()
def valid_mining_permission(self):
if self._master_address == self._mining_xmss.get_address():
return True
addr_state = self.state.get_address(self._master_address)
access_type = addr_state.get_slave_permission(self._mining_xmss.pk())
if access_type == -1:
logger.warning('Slave is not authorized yet for mining')
logger.warning('Added Slave Txn')
slave_tx = Transaction.from_json(self._slaves[2])
self._add_unprocessed_txn_fn(slave_tx, None)
return None
return True
def get_state(self, header_hash, addresses_set):
tmp_header_hash = header_hash
parent_headerhash = None
addresses_state = dict()
for address in addresses_set:
addresses_state[address] = None
while True:
if self.state_objects.contains(header_hash):
parent_headerhash = header_hash
self.set_addresses_state(addresses_state, header_hash)
break
block = self.get_block(header_hash)
if not block:
logger.warning('[get_state] No Block Found %s', header_hash)
break
if block.block_number == 0:
break
header_hash = block.prev_headerhash
for genesis_balance in GenesisBlock().genesis_balance:
bytes_addr = genesis_balance.address.encode()
if not addresses_state[bytes_addr]:
addresses_state[bytes_addr] = AddressState.get_default(bytes_addr)
addresses_state[bytes_addr]._data.balance = genesis_balance.balance
for address in addresses_state:
if not addresses_state[address]:
addresses_state[address] = AddressState.get_default(address)
header_hash = tmp_header_hash
hash_path = []
while True:
if parent_headerhash == header_hash:
break
block = self.get_block(header_hash)
if not block:
break
hash_path.append(header_hash)
header_hash = block.prev_headerhash
if block.block_number == 0:
break
for header_hash in hash_path[-1::-1]:
block = self.get_block(header_hash)
for tx_pbdata in block.transactions:
tx = Transaction.from_pbdata(tx_pbdata)
tx.apply_on_state(addresses_state)
return addresses_state
def solutionEvent(self, nonce):
# NOTE: This function usually runs in the context of a C++ thread
try:
logger.debug('Solution Found %s', nonce)
self._mining_block.set_nonces(nonce, 0)
logger.info('Block #%s nonce: %s', self._mining_block.block_number,
StringToUInt256(str(nonce))[-4:])
logger.info('Hash Rate: %s H/s', self.hashRate())
cloned_block = copy.deepcopy(self._mining_block)
self.pre_block_logic(cloned_block)
except Exception as e:
logger.warning("Exception in solutionEvent")
logger.exception(e)
def get_valid_peers(peer_ips, peer_ip, public_port):
new_peers = set()
tmp = list(peer_ips)
tmp.append("{0}:{1}".format(peer_ip, public_port))
for ip_port in tmp:
try:
parse_peer_addr(ip_port, True)
new_peers.add(ip_port)
except Exception as _:
logger.warning("Invalid Peer Address {} sent by {}".format(ip_port, peer_ip))
return new_peers
def check_stale_txn(self, state, current_block_number):
i = 0
while i < len(self.transaction_pool):
tx_info = self.transaction_pool[i][1]
if tx_info.is_stale(current_block_number):
if not tx_info.validate(state):
logger.warning('Txn validation failed for tx in tx_pool')
self.remove_tx_from_pool(tx_info.transaction)
continue
tx_info.update_block_number(current_block_number)
self.broadcast_tx(tx_info.transaction)
i += 1
def commit(self, state_loader, batch=None):
# TODO (cyyber): Optimization, instead of moving from current to headerhash,
# blocknumber could be used in state_code, and current could point to cache of
# latest blocknumber
for address in self._data.addresses:
data = self._db.get_raw(self.state_code + address)
if data is None:
logger.warning('>>>>>>>>> GOT NONE <<<<<<< %s', address)
self._db.put_raw(state_loader.state_code + address, data, batch)
self.add_address(address)
self._db.delete(self.state_code + address, batch)
del self._data.addresses[:]
self._db.put_raw(b'state' + self.state_code, MessageToJson(self._data).encode(), batch)
def handle_chain_state(self, source, message: qrllegacy_pb2.LegacyMessage):
P2PBaseObserver._validate_message(message, qrllegacy_pb2.LegacyMessage.CHAINSTATE)
message.chainStateData.timestamp = ntp.getTime() # Receiving time
try:
UInt256ToString(message.chainStateData.cumulative_difficulty)
except ValueError:
logger.warning('Invalid Cumulative Difficulty sent by peer')
source.loseConnection()
return
self._peer_node_status[source] = message.chainStateData
def connect_peer(self, full_address):
try:
addr = IPMetadata.from_full_address(full_address)
connected_peers = self.get_connected_peer_addrs()
should_connect = addr.full_address not in connected_peers
if should_connect:
reactor.connectTCP(addr.ip, addr.port, self)
except Exception as e:
logger.warning("Could not connect to %s - %s", full_address,
str(e))
def put_tx_metadata(state: State, txn: Transaction, block_number: int, timestamp: int, batch) -> bool:
try:
tm = TransactionMetadata.create(tx=txn,
block_number=block_number,
timestamp=timestamp)
state._db.put_raw(txn.txhash,
tm.serialize(),
batch)
except Exception:
logger.warning("Error writing tx metadata")
return False
return True
def _parse_buffer(self, total_read):
# FIXME: This parsing/wire protocol needs to be replaced
"""
>>> from pyqrllib.pyqrllib import hstr2bin
>>> p=P2PProtocol()
>>> p._buffer = bytes(hstr2bin('000000191a170a0776657273696f6e120c67656e657369735f68617368'+ \
'000000191a170a0776657273696f6e120c67656e657369735f68617368'))
>>> messages = p._parse_buffer([0])
>>> len(list(messages))
2
"""
chunk_size = 0
while self._buffer:
if len(self._buffer) < 5:
# Buffer is still incomplete as it doesn't have message size
return
ignore_skip = False
try:
chunk_size_raw = self._buffer[:4]
chunk_size = struct.unpack('>L', chunk_size_raw)[0] # is m length encoded correctly?
if chunk_size <= 0:
logger.debug("<X< %s", bin2hstr(self._buffer))
raise Exception("Invalid chunk size <= 0")
if chunk_size > config.dev.message_buffer_size:
raise Exception("Invalid chunk size > message_buffer_size")
if len(self._buffer) - 4 < chunk_size: # As 4 bytes includes chunk_size_raw
ignore_skip = True # Buffer is still incomplete as it doesn't have message so skip moving buffer
return
message_raw = self._buffer[4:4 + chunk_size]
message = qrllegacy_pb2.LegacyMessage()
message.ParseFromString(message_raw)
yield message
except Exception as e: # no qa
logger.warning("Problem parsing message. Banning+Dropping connection")
logger.exception(e)
self.peer_manager.ban_channel(self)
finally:
if not ignore_skip:
skip = 4 + chunk_size
self._buffer = self._buffer[skip:]
total_read[0] += skip
def get_ntp_response():
for retry in range(NTP_RETRIES):
ntp_server = config.user.ntp_servers[retry % len(config.user.ntp_servers)]
try:
ntp_client = NTPClient()
response = ntp_client.request(ntp_server, version=NTP_VERSION)
except Exception as e:
logger.warning(e)
continue
return response
# FIXME: Provide some proper clean before exiting
logger.fatal("Could not contact NTP servers after %d retries", NTP_RETRIES)
sys.exit(-1)
def get_ntp_response():
for retry in range(NTP_RETRIES):
ntp_server = ntp_servers[retry % len(ntp_servers)]
try:
ntp_client = NTPClient()
response = ntp_client.request(ntp_server, version=NTP_VERSION)
except Exception as e:
logger.warning(e)
continue
return response
# FIXME: Provide some proper clean before exiting
logger.fatal("Could not contact NTP servers after %d retries", NTP_RETRIES)
sys.exit(-1)
def add_tx_from_block_to_pool(self, block: Block, current_block_number):
"""
Move all transactions from block to transaction pool.
:param block:
:return:
"""
for protobuf_tx in block.transactions[1:]:
if not self.add_tx_to_pool(Transaction.from_pbdata(protobuf_tx),
current_block_number):
logger.warning(
'Failed to Add transaction into transaction pool')
logger.warning('Block #%s %s', block.block_number,
bin2hstr(block.headerhash))
return
def handle_message_received(self, source,
message: qrllegacy_pb2.LegacyMessage):
"""
Message Receipt
This function accepts message receipt from peer,
checks if the message hash already been received or not.
In case its a already received message, it is ignored.
Otherwise the request is made to get the full message.
:return:
"""
mr_data = message.mrData
msg_hash = mr_data.hash
# FIXME: Separate into respective message handlers
if mr_data.type not in MessageReceipt.allowed_types:
return
if mr_data.type == qrllegacy_pb2.LegacyMessage.TX and source.factory.sync_state.state != ESyncState.synced:
return
if mr_data.type == qrllegacy_pb2.LegacyMessage.TX:
if len(source.factory._chain_manager.tx_pool.pending_tx_pool
) >= config.dev.transaction_pool_size:
logger.warning(
'TX pool size full, incoming tx dropped. mr hash: %s',
bin2hstr(msg_hash))
return
if mr_data.type == qrllegacy_pb2.LegacyMessage.BK:
if mr_data.block_number > source.factory.chain_height + config.dev.max_margin_block_number:
logger.debug('Skipping block #%s as beyond lead limit',
mr_data.block_number)
return
if mr_data.block_number < source.factory.chain_height - config.dev.reorg_limit:
logger.debug('Skipping block #%s as beyond re-org limit',
mr_data.block_number)
return
if source.factory.master_mr.contains(msg_hash, mr_data.type):
return
source.factory.master_mr.add_peer(msg_hash, mr_data.type, source,
mr_data)
if source.factory.master_mr.is_callLater_active(
msg_hash): # Ignore if already requested
return
source.factory.request_full_message(mr_data)
def validate_slave(self, addr_from_state: AddressState,
addr_from_pk_state: AddressState):
addr_from_pk = bytes(QRLHelper.getAddress(self.PK))
master_address = self._get_master_address()
allowed_access_types = self._get_allowed_access_types()
if self.master_addr == addr_from_pk:
logger.warning('Matching master_addr field and address from PK')
return False
if addr_from_pk != master_address:
if str(self.PK) not in addr_from_state.slave_pks_access_type:
logger.warning("Public key and address don't match")
return False
access_type = addr_from_pk_state.slave_pks_access_type[str(
self.PK)]
if access_type not in allowed_access_types:
logger.warning('Access Type %s', access_type)
logger.warning(
'Slave Address doesnt have sufficient permission')
return False
return True
def validate_slave(self, addr_from_state: AddressState,
addr_from_pk_state: AddressState):
addr_from_pk = bytes(QRLHelper.getAddress(self.PK))
# Validate Slave for CoinBase txn is no more required
if isinstance(self, CoinBase):
master_address = self.addr_to
allowed_access_types = [0, 1]
else:
master_address = self.addr_from
allowed_access_types = [0]
if self.master_addr == addr_from_pk:
logger.warning('Matching master_addr field and address from PK')
return False
if addr_from_pk != master_address:
if str(self.PK) not in addr_from_state.slave_pks_access_type:
logger.warning("Public key and address don't match")
return False
access_type = addr_from_pk_state.slave_pks_access_type[str(
self.PK)]
if access_type not in allowed_access_types:
logger.warning('Access Type %s', access_type)
logger.warning(
'Slave Address doesnt have sufficient permission')
return False
return True
def _validate_custom(self) -> bool:
if len(self.message_hash) == 0:
logger.warning('Message cannot be empty')
return False
if len(self.addr_to) > 0 and not (OptimizedAddressState.address_is_valid(self.addr_to)):
logger.warning('[MessageTransaction] Invalid address addr_to: %s', bin2hstr(self.addr_to))
return False
if self.fee < 0:
logger.info('State validation failed for %s because: Negative send', bin2hstr(self.txhash))
return False
return True
def _validate_extended(self, state_container: StateContainer):
if state_container.block_number < state_container.current_dev_config.hard_fork_heights[
0]:
logger.warning(
"[MultiSigCreate] Hard Fork Feature not yet activated")
return False
if len(
self.signatories
) > state_container.current_dev_config.transaction_multi_output_limit:
logger.warning(
'[MultiSigCreate] Number of signatories exceeds max limit')
logger.warning('Number of Signatories %s', len(self.signatories))
logger.warning('Number of Weights %s', len(self.weights))
return False
tx_balance = state_container.addresses_state[self.addr_from].balance
if tx_balance < self.fee:
logger.info(
'State validation failed for %s because: Insufficient funds',
bin2hstr(self.txhash))
logger.info('balance: %s, fee: %s, amount: %s', tx_balance,
self.fee)
return False
return True
def _try_branch_add_block(self,
block,
batch,
check_stale=True) -> (bool, bool):
"""
This function returns list of bool types. The first bool represent
if the block has been added successfully and the second bool
represent the fork_flag, which becomes true when a block triggered
into fork recovery.
:param block:
:param batch:
:return: [Added successfully, fork_flag]
"""
if self._last_block.headerhash == block.prev_headerhash:
if not self._apply_block(block, batch):
return False, False
self._state.put_block(block, batch)
last_block_metadata = self._state.get_block_metadata(
self._last_block.headerhash)
if last_block_metadata is None:
logger.warning("Could not find log metadata for %s",
bin2hstr(self._last_block.headerhash))
return False, False
last_block_difficulty = int(
UInt256ToString(last_block_metadata.cumulative_difficulty))
new_block_metadata = self._add_block_metadata(block.headerhash,
block.timestamp,
block.prev_headerhash,
batch)
new_block_difficulty = int(
UInt256ToString(new_block_metadata.cumulative_difficulty))
if new_block_difficulty > last_block_difficulty:
if self._last_block.headerhash != block.prev_headerhash:
fork_state = qrlstateinfo_pb2.ForkState(
initiator_headerhash=block.headerhash)
self._state.put_fork_state(fork_state, batch)
self._state.write_batch(batch)
return self._fork_recovery(block, fork_state), True
self._update_chainstate(block, batch)
if check_stale:
self.tx_pool.check_stale_txn(self._state, block.block_number)
self.trigger_miner = True
return True, False
def monitor_connections(self):
reactor.callLater(180, self.monitor_connections)
if len(self._peer_connections) == 0:
logger.warning('No Connected Peer Found')
reactor.callLater(60, self._qrl_node.connect_peers)
return
connected_peers_set = set()
for conn_protocol in self._peer_connections:
connected_peers_set.add(conn_protocol.peer_ip)
for ip in config.user.peer_list:
if ip not in connected_peers_set:
self.connect_peer(ip)
def combine_peer_lists(peer_ips,
sender_full_addresses: List,
check_global=False) -> Set[IPMetadata]:
tmp_list = list(peer_ips)
tmp_list.extend(sender_full_addresses)
answer = set()
for item in tmp_list:
try:
answer.add(
IPMetadata.canonical_full_address(item, check_global))
except: # noqa
logger.warning("Invalid Peer Address {}".format(item))
return answer
def handleEvent(self, event):
# NOTE: This function usually runs in the context of a C++ thread
try:
if event.type == SOLUTION:
nonce = event.nonce
self._mining_block.set_nonces(nonce, 0)
logger.debug('Solution Found %s', nonce)
logger.info('Block #%s nonce: %s',
self._mining_block.block_number, nonce)
logger.info('Hash Rate: %s H/s', self.hashRate())
cloned_block = copy.deepcopy(self._mining_block)
self.pre_block_logic(cloned_block)
except Exception as e:
logger.warning("Exception in solutionEvent")
logger.exception(e)
def _read_wallet(self, filename) -> List[AddressItem]:
answer = []
if not os.path.isfile(filename):
return answer
try:
with open(filename, "rb") as infile:
data = simplejson.loads(infile.read())
answer = [self._get_address_item_from_json(d) for d in data]
except Exception as e:
logger.warning("ReadWallet: %s", e)
return answer
def monitor_connections(self):
reactor.callLater(180, self.monitor_connections)
if len(self._peer_connections) == 0:
logger.warning('No Connected Peer Found')
reactor.callLater(60, self._qrl_node.connect_peers)
return
connected_peers_set = set()
for conn_protocol in self._peer_connections:
connected_peers_set.add(conn_protocol.peer_ip)
for ip in config.user.peer_list:
if ip not in connected_peers_set:
self.connect_peer(ip)
def _try_branch_add_block(self, block, batch=None) -> bool:
parent_block = self.state.get_block(block.prev_headerhash)
if not block.validate_parent_child_relation(parent_block):
logger.warning('Failed to validate blocks parent child relation')
return False
address_set = self.state.prepare_address_list(
block) # Prepare list for current block
if self.last_block.headerhash == block.prev_headerhash:
address_txn = self.state.get_state_mainchain(address_set)
else:
address_txn = self.state.get_state(block.prev_headerhash,
address_set)
if self.validate_block(block, address_txn):
self.state.put_block(block, None)
self.add_block_metadata(block.headerhash, block.timestamp,
block.prev_headerhash, None)
last_block_metadata = self.state.get_block_metadata(
self.last_block.headerhash)
new_block_metadata = self.state.get_block_metadata(
block.headerhash)
last_block_difficulty = int(
UInt256ToString(last_block_metadata.cumulative_difficulty))
new_block_difficulty = int(
UInt256ToString(new_block_metadata.cumulative_difficulty))
self.trigger_miner = False
if new_block_difficulty > last_block_difficulty:
if self.last_block.headerhash != block.prev_headerhash:
self.rollback(block)
return True
self.state.update_mainchain_state(address_txn,
block.block_number,
block.headerhash)
self.last_block = block
self._update_mainchain(block, batch)
self.tx_pool.remove_tx_in_block_from_pool(block)
self.state.update_mainchain_height(block.block_number, batch)
self.state.update_tx_metadata(block, batch)
self.trigger_miner = True
return True
return False
def validate(self) -> bool:
fee_reward = 0
for index in range(1, len(self.transactions)):
fee_reward += self.transactions[index].fee
if len(self.transactions) == 0:
return False
try:
coinbase_txn = Transaction.from_pbdata(self.transactions[0])
coinbase_amount = coinbase_txn.amount
except Exception as e:
logger.warning('Exception %s', e)
return False
return self.blockheader.validate(fee_reward, coinbase_amount)
def validate_extended(self, addr_from_state, addr_from_pk_state):
if not self.validate_slave(addr_from_state, addr_from_pk_state):
return False
if self.addr_from != config.dev.coinbase_address:
return False
if not (AddressState.address_is_valid(self.addr_from) and AddressState.address_is_valid(self.addr_to)):
logger.warning('Invalid address addr_from: %s addr_to: %s', self.addr_from, self.addr_to)
return False
if addr_from_pk_state.ots_key_reuse(self.ots_key):
logger.warning('CoinBase Txn: OTS Public key re-use detected %s', self.txhash)
return False
return True
def get_valid_peers(peer_ips, peer_ip, public_port):
new_peers = set()
for ip_port in peer_ips:
try:
parse_peer_addr(ip_port)
new_peers.add(ip_port)
except Exception as e:
logger.warning("Invalid Peer Address %s", ip_port)
logger.warning("Sent by %s", peer_ip)
logger.exception(e)
if 0 < public_port <= 65535:
new_peers.add("{0}:{1}".format(peer_ip, public_port))
return new_peers
def validate_parent_child_relation(self, parent_block):
if parent_block.block_number != self.block_number - 1:
logger.warning('Block numbers out of sequence: failed validation')
return False
if parent_block.headerhash != self.prev_blockheaderhash:
logger.warning('Headerhash not in sequence: failed validation')
return False
if self.timestamp < parent_block.timestamp:
logger.warning('BLOCK timestamp is less than prev block timestamp')
logger.warning('block timestamp %s ', self.timestamp)
logger.warning('must be greater than or equals to %s', parent_block.timestamp)
return False
return True
def validate(self) -> bool:
fee_reward = 0
for index in range(1, len(self.transactions)):
fee_reward += self.transactions[index].fee
if len(self.transactions) == 0:
return False
try:
coinbase_txn = Transaction.from_pbdata(self.transactions[0])
coinbase_amount = coinbase_txn.amount
except Exception as e:
logger.warning('Exception %s', e)
return False
return self.blockheader.validate(fee_reward, coinbase_amount)
def validate_parent_child_relation(self, parent_block):
if parent_block.block_number != self.block_number - 1:
logger.warning('Block numbers out of sequence: failed validation')
return False
if parent_block.headerhash != self.prev_blockheaderhash:
logger.warning('Headerhash not in sequence: failed validation')
return False
if self.timestamp < parent_block.timestamp:
logger.warning('BLOCK timestamp is less than prev block timestamp')
logger.warning('block timestamp %s ', self.timestamp)
logger.warning('must be greater than or equals to %s', parent_block.timestamp)
return False
return True
def start_download(self):
# FIXME: Why PoW is downloading blocks?
# add peers and their identity to requested list
# FMBH
if self.sync_state.state == ESyncState.synced:
return
logger.info('Checking Download..')
if self.p2p_factory.connections == 0:
logger.warning('No connected peers. Moving to synced state')
self.update_node_state(ESyncState.synced)
return
self.update_node_state(ESyncState.syncing)
logger.info('Initializing download from %s', self.chain_manager.height + 1)
self.p2p_factory.randomize_block_fetch()
def monitor_connections(self):
reactor.callLater(config.user.monitor_connections_interval,
self.monitor_connections)
if len(self._peer_connections) == 0:
logger.warning('No Connected Peer Found')
reactor.callLater(10, self._qrl_node.peer_manager.connect_peers)
return
connected_peers_set = set()
for conn_protocol in self._peer_connections:
connected_peers_set.add(conn_protocol.peer.full_address)
for peer_item in config.user.peer_list:
peer_metadata = IPMetadata.from_full_address(peer_item)
if peer_metadata.full_address not in connected_peers_set:
self.connect_peer(peer_metadata.full_address)
def validate(self) -> bool:
"""
This method calls validate_or_raise, logs any failure and returns True or False accordingly
The main purpose is to avoid exceptions and accomodate legacy code
:return: True is the transation is valid
:rtype: bool
"""
try:
self.validate_or_raise()
except ValueError as e:
logger.info('[%s] failed validate_tx', bin2hstr(self.txhash))
logger.warning(str(e))
return False
except Exception as e:
logger.exception(e)
return False
return True
def main():
args = parse_arguments()
config.create_path(config.user.wallet_dir)
mining_credit_wallet = get_mining_credit_wallet(args.mining_credit_wallet)
if not mining_credit_wallet:
logger.warning('Invalid Mining Credit Wallet Address')
logger.warning('%s', args.mining_credit_wallet)
return False
logger.debug(
"====================================================================================="
)
logger.info("Data Path: %s", args.data_dir)
config.user.data_dir = args.data_dir
config.create_path(config.user.data_dir)
ntp.setDrift()
logger.info('Initializing chain..')
persistent_state = State()
chain_manager = ChainManager(state=persistent_state)
chain_manager.load(Block.from_json(GenesisBlock().to_json()))
qrlnode = QRLNode(db_state=persistent_state,
mining_credit_wallet=mining_credit_wallet)
qrlnode.set_chain_manager(chain_manager)
set_logger(args, qrlnode.sync_state)
#######
# NOTE: Keep assigned to a variable or might get collected
admin_service, grpc_service, mining_service = start_services(qrlnode)
qrlnode.start_listening()
qrlnode.connect_peers()
qrlnode.start_pow(args.mining_thread_count)
logger.info('QRL blockchain ledger %s', config.dev.version)
logger.info('mining/staking address %s', args.mining_credit_wallet)
# FIXME: This will be removed once we move away from Twisted
reactor.run()
def get_last_txs(state: State):
try:
last_txn = LastTransactions.deserialize(
state._db.get_raw(b'last_txn'))
except KeyError:
return []
except Exception as e: # noqa
logger.warning("[get_last_txs] Exception during call %s", e)
return []
txs = []
for tx_metadata in last_txn.tx_metadata:
data = tx_metadata.transaction
tx = Transaction.from_pbdata(data)
txs.append(tx)
return txs
def validate(self, verify_signature=True) -> bool:
"""
This method calls validate_or_raise, logs any failure and returns True or False accordingly
The main purpose is to avoid exceptions and accommodate legacy code
:return: True is the transaction is valid
:rtype: bool
"""
try:
self.validate_or_raise(verify_signature)
except ValueError as e:
logger.info('[%s] failed validate_tx', bin2hstr(self.txhash))
logger.warning(str(e))
return False
except Exception as e:
logger.exception(e)
return False
return True
def remove(self, address_state, value: bytes):
address_state.update_counter_by_name(self.name, value=1, subtract=True)
key = address_state.address
count = address_state.get_counter_by_name(self.name)
storage_key = self.generate_key(address_state.address, count)
if storage_key not in self.key_value:
self.key_value[storage_key] = self.get_paginated_data(key, count)
if self.key_value[storage_key][-1] != value:
logger.warning("Expected value %s",
self.key_value[storage_key][-1])
logger.warning("Found value %s", value)
raise Exception("Unexpected value into storage")
del self.key_value[storage_key][-1]
def start_download(self):
# FIXME: Why PoW is downloading blocks?
# add peers and their identity to requested list
# FMBH
if self.sync_state.state == ESyncState.synced:
return
logger.info('Checking Download..')
if self.p2p_factory.connections == 0:
logger.warning('No connected peers. Moving to synced state')
self.update_node_state(ESyncState.synced)
return
self.update_node_state(ESyncState.syncing)
logger.info('Initializing download from %s', self.chain_manager.height + 1)
self.p2p_factory.randomize_block_fetch()
def dataReceived(self, data: bytes) -> None:
self._buffer += data
total_read = len(self._buffer)
if total_read > config.dev.max_bytes_out:
logger.warning('Disconnecting peer %s', self.peer_ip)
logger.warning('Buffer Size %s', len(self._buffer))
self.loseConnection()
read_bytes = [0]
for msg in self._parse_buffer(read_bytes):
self._observable.notify(msg)
if read_bytes[0]:
p2p_ack = qrl_pb2.P2PAcknowledgement(bytes_processed=read_bytes[0])
msg = qrllegacy_pb2.LegacyMessage(func_name=qrllegacy_pb2.LegacyMessage.P2P_ACK,
p2pAckData=p2p_ack)
self.send(msg)
def create(blocknumber: int,
mining_nonce: int,
PK: bytes,
prev_blockheaderhash: bytes,
hashedtransactions: bytes,
fee_reward: int):
"""
Create a block header based on the parameters
>>> BlockHeader.create(blocknumber=1, mining_nonce=1, PK=b'publickey',
... prev_blockheaderhash=b'headerhash',
... hashedtransactions=b'some_data', fee_reward=1) is not None
True
>>> b=BlockHeader.create(blocknumber=1, mining_nonce=1, PK=b'publickey',
... prev_blockheaderhash=b'headerhash',
... hashedtransactions=b'some_data', fee_reward=1)
>>> b.epoch
0
"""
bh = BlockHeader()
bh._data.block_number = blocknumber
bh._data.epoch = bh._data.block_number // config.dev.blocks_per_epoch
if bh._data.block_number != 0:
bh._data.timestamp.seconds = int(ntp.getTime())
if bh._data.timestamp == 0:
logger.warning('Failed to get NTP timestamp')
return
bh._data.hash_header_prev = prev_blockheaderhash
bh._data.merkle_root = hashedtransactions
bh._data.PK = PK
bh._data.reward_fee = fee_reward
bh._data.reward_block = 0
if bh._data.block_number != 0:
bh._data.reward_block = bh.block_reward_calc()
bh.set_mining_nonce(mining_nonce)
return bh
def validate_extended(self, addr_from_state, addr_from_pk_state, transaction_pool):
if not self.validate_slave(addr_from_state, addr_from_pk_state):
return False
tx_balance = addr_from_state.balance
if self.fee < 0:
logger.info('State validation failed for %s because: Negative send', self.txhash)
return False
if not AddressState.address_is_valid(self.addr_from):
logger.warning('Invalid address addr_from: %s', self.addr_from)
return False
if not AddressState.address_is_valid(self.owner):
logger.warning('Invalid address owner_addr: %s', self.owner)
return False
for address_balance in self.initial_balances:
if not AddressState.address_is_valid(address_balance.address):
logger.warning('Invalid address address in initial_balances: %s', address_balance.address)
return False
if tx_balance < self.fee:
logger.info('TokenTxn State validation failed for %s because: Insufficient funds', self.txhash)
logger.info('balance: %s, Fee: %s', tx_balance, self.fee)
return False
if self.ots_key_reuse(addr_from_pk_state, self.ots_key):
logger.info('TokenTxn State validation failed for %s because: OTS Public key re-use detected', self.txhash)
return False
return True
def start_mining(self,
tx_pool,
parent_block,
parent_difficulty,
thread_count=config.user.mining_thread_count):
mining_xmss = self.get_mining_xmss()
if not mining_xmss:
logger.warning('No Mining XMSS Found')
return
try:
self.cancel()
self._mining_block = self.create_block(last_block=parent_block,
mining_nonce=0,
tx_pool=tx_pool,
signing_xmss=self._mining_xmss,
master_address=self._master_address)
measurement = self.state.get_measurement(self._mining_block.timestamp, self._mining_block.prev_headerhash)
current_difficulty, current_target = self._difficulty_tracker.get(
measurement=measurement,
parent_difficulty=parent_difficulty)
input_bytes, nonce_offset = self._get_mining_data(self._mining_block)
logger.debug('!!! Mine #{} | {} ({}) | {} -> {} | {}'.format(
self._mining_block.block_number,
measurement, self._mining_block.timestamp - parent_block.timestamp,
UInt256ToString(parent_difficulty), UInt256ToString(current_difficulty),
current_target
))
logger.debug('!!! {}'.format(current_target))
self.start(input=input_bytes,
nonceOffset=nonce_offset,
target=current_target,
thread_count=thread_count)
except Exception as e:
logger.warning("Exception in start_mining")
logger.exception(e)
def _try_branch_add_block(self, block, batch=None) -> bool:
parent_block = self.state.get_block(block.prev_headerhash)
if not block.validate_parent_child_relation(parent_block):
logger.warning('Failed to validate blocks parent child relation')
return False
address_set = self.state.prepare_address_list(block) # Prepare list for current block
if self.last_block.headerhash == block.prev_headerhash:
address_txn = self.state.get_state_mainchain(address_set)
else:
address_txn = self.state.get_state(block.prev_headerhash, address_set)
if self.validate_block(block, address_txn):
self.state.put_block(block, None)
self.add_block_metadata(block.headerhash, block.timestamp, block.prev_headerhash, None)
last_block_metadata = self.state.get_block_metadata(self.last_block.headerhash)
new_block_metadata = self.state.get_block_metadata(block.headerhash)
last_block_difficulty = int(UInt256ToString(last_block_metadata.cumulative_difficulty))
new_block_difficulty = int(UInt256ToString(new_block_metadata.cumulative_difficulty))
self.trigger_miner = False
if new_block_difficulty > last_block_difficulty:
if self.last_block.headerhash != block.prev_headerhash:
self.rollback(block)
return True
self.state.update_mainchain_state(address_txn, block.block_number, block.headerhash)
self.last_block = block
self._update_mainchain(block, batch)
self.tx_pool.remove_tx_in_block_from_pool(block)
self.state.update_mainchain_height(block.block_number, batch)
self.state.update_tx_metadata(block, batch)
self.trigger_miner = True
return True
return False
def validate_slave(self, addr_from_state, addr_from_pk_state):
addr_from_pk = getAddress('Q', self.PK)
if isinstance(self, CoinBase):
master_address = self.txto
allowed_access_types = [0, 1]
else:
master_address = self.txfrom
allowed_access_types = [0]
if addr_from_pk.encode() != master_address:
if str(self.PK) not in addr_from_state.slave_pks_access_type:
logger.warning('Public key and address dont match')
return False
access_type = addr_from_pk_state.slave_pks_access_type[str(self.PK)]
if access_type not in allowed_access_types:
logger.warning('Access Type %s', access_type)
logger.warning('Slave Address doesnt have sufficient permission')
return False
return True
def mining_wallet_checks(args):
slaves_filename = os.path.join(config.user.wallet_dir, config.user.slaves_filename)
if args.randomizeSlaveXMSS:
addrBundle = Wallet.get_new_address()
slaves = [addrBundle.xmss.get_address(), [addrBundle.xmss.get_seed()], None]
write_slaves(slaves_filename, slaves)
try:
slaves = read_slaves(slaves_filename)
except FileNotFoundError:
logger.warning('No Slave Seeds found!!')
logger.warning('It is highly recommended to use the slave for mining')
try:
ans = input('Do you want to use main wallet for mining? (Y/N) ')
if ans == 'N':
quit(0)
seed = input('Enter hex or mnemonic seed of mining wallet ').encode()
except KeyboardInterrupt:
quit(0)
if len(seed) == 96: # hexseed
bin_seed = hstr2bin(seed.decode())
elif len(seed.split()) == 32:
bin_seed = mnemonic2bin(seed.decode())
else:
logger.warning('Invalid XMSS seed')
quit(1)
addrBundle = Wallet.get_new_address(seed=bin_seed)
slaves = [addrBundle.xmss.get_address(), [addrBundle.xmss.get_seed()], None]
write_slaves(slaves_filename, slaves)
slaves = read_slaves(slaves_filename)
except KeyboardInterrupt:
quit(1)
except Exception as e:
logger.error('Exception %s', e)
quit(1)
return slaves
def validate_block(self, block, address_txn) -> bool:
len_transactions = len(block.transactions)
if len_transactions < 1:
return False
coinbase_tx = Transaction.from_pbdata(block.transactions[0])
coinbase_tx.validate()
if not self.validate_mining_nonce(block):
return False
if coinbase_tx.subtype != qrl_pb2.Transaction.COINBASE:
return False
if not coinbase_tx.validate():
return False
coinbase_tx.apply_on_state(address_txn)
addr_from_pk_state = address_txn[coinbase_tx.txto]
addr_from_pk = Transaction.get_slave(coinbase_tx)
if addr_from_pk:
addr_from_pk_state = address_txn[addr_from_pk]
if not coinbase_tx.validate_extended(address_txn[coinbase_tx.txto],
addr_from_pk_state,
[]):
return False
# TODO: check block reward must be equal to coinbase amount
for tx_idx in range(1, len_transactions):
tx = Transaction.from_pbdata(block.transactions[tx_idx])
if tx.subtype == qrl_pb2.Transaction.COINBASE:
return False
if not tx.validate(): # TODO: Move this validation, before adding txn to pool
return False
addr_from_pk_state = address_txn[tx.txfrom]
addr_from_pk = Transaction.get_slave(tx)
if addr_from_pk:
addr_from_pk_state = address_txn[addr_from_pk]
if not tx.validate_extended(address_txn[tx.txfrom], addr_from_pk_state, []):
return False
expected_nonce = address_txn[tx.txfrom].nonce + 1
if tx.nonce != expected_nonce:
logger.warning('nonce incorrect, invalid tx')
logger.warning('subtype: %s', tx.subtype)
logger.warning('%s actual: %s expected: %s', tx.txfrom, tx.nonce, expected_nonce)
return False
if tx.ots_key_reuse(address_txn[tx.txfrom], tx.ots_key):
logger.warning('pubkey reuse detected: invalid tx %s', tx.txhash)
logger.warning('subtype: %s', tx.subtype)
return False
tx.apply_on_state(address_txn)
return True
def create_block(self, last_block, mining_nonce, tx_pool, signing_xmss, master_address) -> Optional[Block]:
# TODO: Persistence will move to rocksdb
# FIXME: Difference between this and create block?????????????
# FIXME: Break encapsulation
dummy_block = Block.create(mining_nonce=mining_nonce,
block_number=last_block.block_number + 1,
prevblock_headerhash=last_block.headerhash,
transactions=[],
signing_xmss=signing_xmss,
master_address=master_address,
nonce=0)
dummy_block.set_mining_nonce(mining_nonce)
signing_xmss.set_index(signing_xmss.get_index() - 1)
t_pool2 = copy.deepcopy(tx_pool.transaction_pool)
del tx_pool.transaction_pool[:]
######
# recreate the transaction pool as in the tx_hash_list, ordered by txhash..
total_txn = len(t_pool2)
txnum = 0
addresses_set = set()
while txnum < total_txn:
tx = t_pool2[txnum]
tx.set_effected_address(addresses_set)
txnum += 1
addresses_state = dict()
for address in addresses_set:
addresses_state[address] = self.state.get_address(address)
block_size = dummy_block.size
block_size_limit = self.state.get_block_size_limit(last_block)
txnum = 0
while txnum < total_txn:
tx = t_pool2[txnum]
# Skip Transactions for later, which doesn't fit into block
if block_size + tx.size + config.dev.tx_extra_overhead > block_size_limit:
txnum += 1
continue
addr_from_pk_state = addresses_state[tx.txfrom]
addr_from_pk = Transaction.get_slave(tx)
if addr_from_pk:
addr_from_pk_state = addresses_state[addr_from_pk]
if tx.ots_key_reuse(addr_from_pk_state, tx.ots_key):
del t_pool2[txnum]
total_txn -= 1
continue
if tx.subtype == qrl_pb2.Transaction.TRANSFER:
if addresses_state[tx.txfrom].balance < tx.amount + tx.fee:
logger.warning('%s %s exceeds balance, invalid tx', tx, tx.txfrom)
logger.warning('subtype: %s', tx.subtype)
logger.warning('Buffer State Balance: %s Transfer Amount %s', addresses_state[tx.txfrom].balance,
tx.amount)
del t_pool2[txnum]
total_txn -= 1
continue
if tx.subtype == qrl_pb2.Transaction.MESSAGE:
if addresses_state[tx.txfrom].balance < tx.fee:
logger.warning('%s %s exceeds balance, invalid message tx', tx, tx.txfrom)
logger.warning('subtype: %s', tx.subtype)
logger.warning('Buffer State Balance: %s Free %s', addresses_state[tx.txfrom].balance, tx.fee)
total_txn -= 1
continue
if tx.subtype == qrl_pb2.Transaction.TOKEN:
if addresses_state[tx.txfrom].balance < tx.fee:
logger.warning('%s %s exceeds balance, invalid tx', tx, tx.txfrom)
logger.warning('subtype: %s', tx.subtype)
logger.warning('Buffer State Balance: %s Fee %s',
addresses_state[tx.txfrom].balance,
tx.fee)
del t_pool2[txnum]
total_txn -= 1
continue
if tx.subtype == qrl_pb2.Transaction.TRANSFERTOKEN:
if addresses_state[tx.txfrom].balance < tx.fee:
logger.warning('%s %s exceeds balance, invalid tx', tx, tx.txfrom)
logger.warning('subtype: %s', tx.subtype)
logger.warning('Buffer State Balance: %s Transfer Amount %s',
addresses_state[tx.txfrom].balance,
tx.fee)
del t_pool2[txnum]
total_txn -= 1
continue
if bin2hstr(tx.token_txhash).encode() not in addresses_state[tx.txfrom].tokens:
logger.warning('%s doesnt own any token with token_txnhash %s', tx.txfrom,
bin2hstr(tx.token_txhash).encode())
del t_pool2[txnum]
total_txn -= 1
continue
if addresses_state[tx.txfrom].tokens[bin2hstr(tx.token_txhash).encode()] < tx.amount:
logger.warning('Token Transfer amount exceeds available token')
logger.warning('Token Txhash %s', bin2hstr(tx.token_txhash).encode())
logger.warning('Available Token Amount %s',
addresses_state[tx.txfrom].tokens[bin2hstr(tx.token_txhash).encode()])
logger.warning('Transaction Amount %s', tx.amount)
del t_pool2[txnum]
total_txn -= 1
continue
if tx.subtype == qrl_pb2.Transaction.LATTICE:
if addresses_state[tx.txfrom].balance < tx.fee:
logger.warning('Lattice TXN %s %s exceeds balance, invalid tx', tx, tx.txfrom)
logger.warning('subtype: %s', tx.subtype)
logger.warning('Buffer State Balance: %s Transfer Amount %s',
addresses_state[tx.txfrom].balance,
tx.fee)
del t_pool2[txnum]
total_txn -= 1
continue
if tx.subtype == qrl_pb2.Transaction.SLAVE:
if addresses_state[tx.txfrom].balance < tx.fee:
logger.warning('Slave TXN %s %s exceeds balance, invalid tx', tx, tx.txfrom)
logger.warning('subtype: %s', tx.subtype)
logger.warning('Buffer State Balance: %s Transfer Amount %s',
addresses_state[tx.txfrom].balance,
tx.fee)
del t_pool2[txnum]
total_txn -= 1
continue
tx.apply_on_state(addresses_state)
tx_pool.add_tx_to_pool(tx)
tx._data.nonce = addresses_state[tx.txfrom].nonce
txnum += 1
block_size += tx.size + config.dev.tx_extra_overhead
coinbase_nonce = self.state.get_address(signing_xmss.get_address()).nonce
if signing_xmss.get_address() in addresses_state:
coinbase_nonce = addresses_state[signing_xmss.get_address()].nonce + 1
block = Block.create(mining_nonce=mining_nonce,
block_number=last_block.block_number + 1,
prevblock_headerhash=last_block.headerhash,
transactions=t_pool2,
signing_xmss=signing_xmss,
master_address=master_address,
nonce=coinbase_nonce)
return block
def block_received(self, source, block: Block):
self.pow.last_pb_time = time.time()
logger.info('>>> Received Block #%d %s', block.block_number, bin2hstr(block.headerhash))
if source != self._target_peer:
logger.warning('Received block from unexpected peer')
logger.warning('Expected peer: %s', self._target_peer.connection_id)
logger.warning('Found peer: %s', source.connection_id)
return
if block.block_number != self._last_requested_block_idx:
logger.warning('Did not match %s', self._last_requested_block_idx)
return
target_start_blocknumber = self._target_node_header_hash.block_number
expected_headerhash = self._target_node_header_hash.headerhashes[block.block_number - target_start_blocknumber]
if block.headerhash != expected_headerhash:
logger.warning('Did not match headerhash')
logger.warning('Expected headerhash %s', expected_headerhash)
logger.warning('Found headerhash %s', block.headerhash)
return
# FIXME: This check should not be necessary
if not self._chain_manager.add_block(block):
logger.warning('Failed to Add Block')
return
try:
reactor.download_monitor.cancel()
except Exception as e:
logger.warning("PB: %s", e)
if self.is_syncing_finished():
return
self._last_requested_block_idx += 1
if self.is_syncing_finished():
return
self.peer_fetch_block()