def block_to_bx_block(self, block_msg: BlockOntMessage, tx_service: TransactionService) \
-> Tuple[memoryview, BlockInfo]:
start_datetime = datetime.utcnow()
start_time = time.time()
block_info = BlockInfo(
block_msg.block_hash(),
[],
start_datetime,
datetime.utcnow(),
(time.time() - start_time) * 1000,
block_msg.txn_count(),
str(block_msg.block_hash()),
convert.bytes_to_hex(block_msg.prev_block_hash().binary),
len(block_msg.rawbytes()),
len(block_msg.rawbytes()),
0
)
return block_msg.rawbytes(), block_info
def bx_block_to_block(self, bx_block_msg: memoryview, tx_service: TransactionService) -> BlockDecompressionResult:
start_datetime = datetime.utcnow()
start_time = time.time()
block_msg = BlockOntMessage(buf=bytearray(bx_block_msg))
block_info = BlockInfo(
block_msg.block_hash(),
[],
start_datetime,
datetime.utcnow(),
(time.time() - start_time) * 1000,
block_msg.txn_count(),
str(block_msg.block_hash()),
convert.bytes_to_hex(block_msg.prev_block_hash().binary),
len(block_msg.rawbytes()),
len(block_msg.rawbytes()),
0
)
return BlockDecompressionResult(block_msg, block_info, [], [])
def block_to_bx_block(self, block_msg: BlockOntMessage, tx_service: TransactionService) -> \
Tuple[memoryview, BlockInfo]:
"""
Compresses a Ontology block's transactions and packs it into a bloXroute block.
"""
compress_start_datetime = datetime.utcnow()
compress_start_timestamp = time.time()
size = 0
buf = deque()
short_ids = []
header = block_msg.txn_header()
size += len(header)
buf.append(header)
for tx in block_msg.txns():
tx_hash, _ = ont_messages_util.get_txid(tx)
short_id = tx_service.get_short_id(tx_hash)
if short_id == constants.NULL_TX_SID:
buf.append(tx)
size += len(tx)
else:
short_ids.append(short_id)
buf.append(ont_constants.ONT_SHORT_ID_INDICATOR_AS_BYTEARRAY)
size += 1
serialized_short_ids = compact_block_short_ids_serializer.serialize_short_ids_into_bytes(
short_ids)
buf.append(serialized_short_ids)
size += constants.UL_ULL_SIZE_IN_BYTES
merkle_root = block_msg.merkle_root()
buf.appendleft(merkle_root)
size += ont_constants.ONT_HASH_LEN
is_consensus_msg_buf = struct.pack("?", False)
buf.appendleft(is_consensus_msg_buf)
size += 1
offset_buf = struct.pack("<Q", size)
buf.appendleft(offset_buf)
size += len(serialized_short_ids)
block = bytearray(size)
off = 0
for blob in buf:
next_off = off + len(blob)
block[off:next_off] = blob
off = next_off
prev_block_hash = convert.bytes_to_hex(
block_msg.prev_block_hash().binary)
bx_block_hash = convert.bytes_to_hex(crypto.double_sha256(block))
original_size = len(block_msg.rawbytes())
block_info = BlockInfo(block_msg.block_hash(), short_ids,
compress_start_datetime, datetime.utcnow(),
(time.time() - compress_start_timestamp) * 1000,
block_msg.txn_count(), bx_block_hash,
prev_block_hash, original_size, size,
100 - float(size) / original_size * 100)
return memoryview(block), block_info
