def parse(cls, stream):
num_headers = read_varint(stream)
blocks = []
for _ in range(num_headers):
blocks.append(Block.parse(stream))
num_txs = read_varint(stream)
if num_txs != 0:
raise RuntimeError("number of txs not 0")
return cls(blocks)
def generate_block(self, prev_hash, transaction_list, nonce_start):
block_hash, nonce, try_and_error = proof_of_work(
prev_hash, difficulty, nonce_start, lambda: self.found)
if try_and_error == -1:
return None
block_header = BlockHeader(prev_hash, block_hash, nonce, difficulty,
self.user.public_key)
block = Block(block_header, transaction_list)
return block
def read(self, recursive=False):
self._init_name_hash()
self.entries = []
# create initial list with blk_num/hash_index for dir scan
blocks = []
for i in xrange(self.block.hash_size):
blk_num = self.block.hash_table[i]
if blk_num != 0:
blocks.append((blk_num,i))
for blk_num,hash_idx in blocks:
# read anonymous block
blk = Block(self.blkdev, blk_num)
blk.read()
if not blk.valid:
self.valid = False
return
# create file/dir node
hash_chain,node = self._read_add_node(blk, recursive)
# store node in entries
self.entries.append(node)
# store node in name_hash
self.name_hash[hash_idx].append(node)
# follow hash chain
if hash_chain != 0:
blocks.append((hash_chain,hash_idx))
# dircaches available?
if self.volume.is_dircache:
self.dcache_blks = []
dcb_num = self.block.extension
while dcb_num != 0:
dcb = DirCacheBlock(self.blkdev, dcb_num)
dcb.read()
if not dcb.valid:
self.valid = False
return
self.dcache_blks.append(dcb)
dcb_num = dcb.next_cache
def read(self, recursive=False):
self._init_name_hash()
self.entries = []
# create initial list with blk_num/hash_index for dir scan
blocks = []
for i in xrange(self.block.hash_size):
blk_num = self.block.hash_table[i]
if blk_num != 0:
blocks.append((blk_num,i))
for blk_num,hash_idx in blocks:
# read anonymous block
blk = Block(self.blkdev, blk_num)
blk.read()
# create file/dir node
hash_chain,node = self._read_add_node(blk, recursive)
# store node in entries
self.entries.append(node)
# store node in name_hash
self.name_hash[hash_idx].append(node)
# follow hash chain
if hash_chain != 0:
blocks.append((hash_chain,hash_idx))
def parse_message(message):
message_type = MessageType.STRING
data = message
try:
message = json.loads(message)
message_type = MessageType[message['type']]
data = message['data']
if message_type == MessageType.NEIGHBOR_LIST:
data = [Neighbor(total_dict=neighbor) for neighbor in data]
elif message_type in (MessageType.NEIGHBOR, MessageType.LOGOUT):
data = Neighbor(total_dict=data)
elif message_type == MessageType.TRANSACTION:
data = Transaction().load_dict(data)
elif message_type == MessageType.BLOCK:
data = Block().load_dict(data)
except Exception as e:
logging.error(e)
return message_type, data