def init_blockchain(rtx):
'''
If blockchain is empty this function will set genesis.
'''
genesis = Block(storage_space=storage_space)
genesis.deserialize(serialized_genesis_block)
storage_space.headers_manager.set_genesis(genesis.header, wtx=rtx)
storage_space.headers_manager.best_tip = (
storage_space.blockchain.current_tip(rtx=rtx),
storage_space.blockchain.current_height(rtx=rtx))
logger.info("Best header tip from blockchain state %d" %
storage_space.headers_manager.best_tip[1])
#greedy search
current_tip = storage_space.headers_manager.best_tip[0]
while True:
try:
header = storage_space.headers_storage.get(current_tip, rtx=rtx)
except KeyError:
break
new_current_tip = current_tip
if len(header.descendants):
for d in header.descendants:
dh = storage_space.headers_storage.get(d, rtx=rtx)
if not dh.invalid:
new_current_tip = d
break
if not new_current_tip == current_tip:
current_tip = new_current_tip
else:
break
storage_space.headers_manager.best_tip = (
current_tip, storage_space.headers_storage.get(current_tip,
rtx=rtx).height)
logger.info("Best header tip after greedy search %d" %
storage_space.headers_manager.best_tip[1])
def process_new_blocks(message):
try:
serialized_blocks = message["blocks"]
num = message["num"]
for i in range(num):
block = Block(storage_space=storage_space)
serialized_blocks = block.deserialize_raw(serialized_blocks)
storage_space.blockchain.add_block(block, no_update=True)
storage_space.blockchain.update(reason="downloaded new blocks")
except Exception as e:
raise e #XXX "DoS messages should be returned"
def __getitem__(self, _hash):
if not _hash in self.storage:
raise KeyError(_hash)
serialized_context_block = self.storage.get_by_hash(_hash)
block = Block(storage_space=self.storage_space)
cblock = ContextBlock(block=block)
cblock.deserialize_raw(serialized_context_block)
return cblock
def process_new_blocks(message, wtx, core):
try:
serialized_blocks = message["blocks"]
num = message["num"]
for i in range(num):
block = Block(storage_space=core.storage_space)
serialized_blocks = block.deserialize_raw(serialized_blocks)
core.storage_space.blockchain.add_block(block,
wtx=wtx,
no_update=True)
if not i % 5:
core.storage_space.blockchain.update(
wtx=wtx, reason="downloaded new blocks")
core.notify(
"blockchain height",
core.storage_space.blockchain.current_height(rtx=wtx))
core.storage_space.blockchain.update(wtx=wtx,
reason="downloaded new blocks")
core.notify("blockchain height",
core.storage_space.blockchain.current_height(rtx=wtx))
except Exception as e:
raise e
raise DOSException() #TODO add info
def init_blockchain():
'''
If blockchain is empty this function will set genesis.
'''
genesis = Block(storage_space=storage_space)
genesis.deserialize(serialized_genesis_block)
storage_space.headers_manager.set_genesis(genesis.header)
if not storage_space.blockchain.current_height >= 0:
storage_space.headers_manager.context_validation(genesis.header.hash)
genesis.non_context_verify()
storage_space.blockchain.add_block(genesis)
else:
storage_space.headers_manager.best_tip = (
storage_space.blockchain.current_tip,
storage_space.blockchain.current_height)
logger.info("Best header tip from blockchain state %d" %
storage_space.headers_manager.best_tip[1])
#greedy search
current_tip = storage_space.headers_manager.best_tip[0]
while True:
try:
header = storage_space.headers_storage[current_tip]
except KeyError:
break
new_current_tip = current_tip
if len(header.descendants):
for d in header.descendants:
dh = storage_space.headers_storage[d]
if not dh.invalid:
new_current_tip = d
break
if not new_current_tip == current_tip:
current_tip = new_current_tip
else:
break
storage_space.headers_manager.best_tip = (
current_tip, storage_space.headers_storage[current_tip].height)
logger.info("Best header tip after greedy search %d" %
storage_space.headers_manager.best_tip[1])