def block_to_bx_block(
self, block_msg: InternalEthBlockInfo,
tx_service: ExtensionTransactionService
) -> Tuple[memoryview, BlockInfo]:
compress_start_datetime = datetime.datetime.utcnow()
compress_start_timestamp = time.time()
self._default_block_size = max(self._default_block_size,
len(block_msg.rawbytes()))
tsk = self.compression_tasks.borrow_task()
tsk.init(tpe.InputBytes(block_msg.rawbytes()), tx_service.proxy)
try:
task_pool_proxy.run_task(tsk)
except tpe.AggregatedException as e:
self.compression_tasks.return_task(tsk)
raise message_conversion_error.eth_block_compression_error(
block_msg.block_hash(), e)
bx_block = tsk.bx_block()
starting_offset = tsk.starting_offset()
block = memoryview(bx_block)[starting_offset:]
compressed_size = len(block)
original_size = len(block_msg.rawbytes()) - starting_offset
block_hash = block_msg.block_hash()
block_info = BlockInfo(
block_hash, tsk.short_ids(), compress_start_datetime,
datetime.datetime.utcnow(),
(time.time() - compress_start_timestamp) * 1000, tsk.txn_count(),
tsk.compressed_block_hash().hex_string(),
tsk.prev_block_hash().hex_string(), original_size, compressed_size,
100 - float(compressed_size) / original_size * 100)
self.compression_tasks.return_task(tsk)
return block, block_info
def block_to_bx_block(
self, block_msg: InternalEthBlockInfo,
tx_service: TransactionService, enable_block_compression: bool,
min_tx_age_seconds: float) -> Tuple[memoryview, BlockInfo]:
"""
Convert Ethereum new block message to internal broadcast message with transactions replaced with short ids
The code is optimized and does not make copies of bytes
:param block_msg: Ethereum new block message
:param tx_service: Transactions service
:param enable_block_compression
:param min_tx_age_seconds
:return: Internal broadcast message bytes (bytearray), tuple (txs count, previous block hash)
"""
compress_start_datetime = datetime.datetime.utcnow()
compress_start_timestamp = time.time()
txs_bytes, block_hdr_full_bytes, remaining_bytes, prev_block_bytes = parse_block_message(
block_msg)
used_short_ids = []
# creating transactions content
content_size = 0
buf = deque()
ignored_sids = []
tx_start_index = 0
tx_count = 0
original_size = len(block_msg.rawbytes())
max_timestamp_for_compression = time.time() - min_tx_age_seconds
while True:
if tx_start_index >= len(txs_bytes):
break
_, tx_item_length, tx_item_start = rlp_utils.consume_length_prefix(
txs_bytes, tx_start_index)
tx_bytes = txs_bytes[tx_start_index:tx_item_start + tx_item_length]
tx_hash_bytes = eth_common_utils.keccak_hash(tx_bytes)
tx_hash = Sha256Hash(tx_hash_bytes)
tx_key = tx_service.get_transaction_key(tx_hash)
short_id = tx_service.get_short_id_by_key(tx_key)
short_id_assign_time = 0
if short_id != constants.NULL_TX_SID:
short_id_assign_time = tx_service.get_short_id_assign_time(
short_id)
if short_id <= constants.NULL_TX_SID or \
not enable_block_compression or short_id_assign_time > max_timestamp_for_compression:
if short_id > constants.NULL_TX_SID:
ignored_sids.append(short_id)
is_full_tx_bytes = rlp_utils.encode_int(1)
tx_content_bytes = tx_bytes
else:
is_full_tx_bytes = rlp_utils.encode_int(0)
used_short_ids.append(short_id)
tx_content_bytes = bytes()
tx_content_prefix = rlp_utils.get_length_prefix_str(
len(tx_content_bytes))
short_tx_content_size = len(is_full_tx_bytes) + len(
tx_content_prefix) + len(tx_content_bytes)
short_tx_content_prefix_bytes = rlp_utils.get_length_prefix_list(
short_tx_content_size)
buf.append(short_tx_content_prefix_bytes)
buf.append(is_full_tx_bytes)
buf.append(tx_content_prefix)
buf.append(tx_content_bytes)
content_size += len(
short_tx_content_prefix_bytes) + short_tx_content_size
tx_start_index = tx_item_start + tx_item_length
tx_count += 1
list_of_txs_prefix_bytes = rlp_utils.get_length_prefix_list(
content_size)
buf.appendleft(list_of_txs_prefix_bytes)
content_size += len(list_of_txs_prefix_bytes)
buf.appendleft(block_hdr_full_bytes)
content_size += len(block_hdr_full_bytes)
buf.append(remaining_bytes)
content_size += len(remaining_bytes)
compact_block_msg_prefix = rlp_utils.get_length_prefix_list(
content_size)
buf.appendleft(compact_block_msg_prefix)
content_size += len(compact_block_msg_prefix)
block = finalize_block_bytes(buf, content_size, used_short_ids)
bx_block_hash = convert.bytes_to_hex(crypto.double_sha256(block))
block_info = BlockInfo(block_msg.block_hash(), used_short_ids,
compress_start_datetime,
datetime.datetime.utcnow(),
(time.time() - compress_start_timestamp) * 1000,
tx_count, bx_block_hash,
convert.bytes_to_hex(prev_block_bytes),
original_size, content_size,
100 - float(content_size) / original_size * 100,
ignored_sids)
return memoryview(block), block_info
def block_to_bx_block(
self, block_msg: InternalEthBlockInfo,
tx_service: TransactionService) -> Tuple[memoryview, BlockInfo]:
"""
Convert Ethereum new block message to internal broadcast message with transactions replaced with short ids
The code is optimized and does not make copies of bytes
:param block_msg: Ethereum new block message
:param tx_service: Transactions service
:return: Internal broadcast message bytes (bytearray), tuple (txs count, previous block hash)
"""
compress_start_datetime = datetime.datetime.utcnow()
compress_start_timestamp = time.time()
msg_bytes = memoryview(block_msg.rawbytes())
_, block_msg_itm_len, block_msg_itm_start = rlp_utils.consume_length_prefix(
msg_bytes, 0)
block_msg_bytes = msg_bytes[block_msg_itm_start:block_msg_itm_start +
block_msg_itm_len]
_, block_hdr_itm_len, block_hdr_itm_start = rlp_utils.consume_length_prefix(
block_msg_bytes, 0)
block_hdr_full_bytes = block_msg_bytes[0:block_hdr_itm_start +
block_hdr_itm_len]
block_hdr_bytes = block_msg_bytes[
block_hdr_itm_start:block_hdr_itm_start + block_hdr_itm_len]
_, prev_block_itm_len, prev_block_itm_start = rlp_utils.consume_length_prefix(
block_hdr_bytes, 0)
prev_block_bytes = block_hdr_bytes[
prev_block_itm_start:prev_block_itm_start + prev_block_itm_len]
_, txs_itm_len, txs_itm_start = rlp_utils.consume_length_prefix(
block_msg_bytes, block_hdr_itm_start + block_hdr_itm_len)
txs_bytes = block_msg_bytes[txs_itm_start:txs_itm_start + txs_itm_len]
remaining_bytes = block_msg_bytes[txs_itm_start + txs_itm_len:]
used_short_ids = []
# creating transactions content
content_size = 0
buf = deque()
tx_start_index = 0
tx_count = 0
while True:
if tx_start_index >= len(txs_bytes):
break
_, tx_item_length, tx_item_start = rlp_utils.consume_length_prefix(
txs_bytes, tx_start_index)
tx_bytes = txs_bytes[tx_start_index:tx_item_start + tx_item_length]
tx_hash_bytes = eth_common_utils.keccak_hash(tx_bytes)
tx_hash = Sha256Hash(tx_hash_bytes)
short_id = tx_service.get_short_id(tx_hash)
if short_id <= 0:
is_full_tx_bytes = rlp_utils.encode_int(1)
tx_content_bytes = tx_bytes
else:
is_full_tx_bytes = rlp_utils.encode_int(0)
used_short_ids.append(short_id)
tx_content_bytes = bytes()
tx_content_prefix = rlp_utils.get_length_prefix_str(
len(tx_content_bytes))
short_tx_content_size = len(is_full_tx_bytes) + len(
tx_content_prefix) + len(tx_content_bytes)
short_tx_content_prefix_bytes = rlp_utils.get_length_prefix_list(
short_tx_content_size)
buf.append(short_tx_content_prefix_bytes)
buf.append(is_full_tx_bytes)
buf.append(tx_content_prefix)
buf.append(tx_content_bytes)
content_size += len(
short_tx_content_prefix_bytes) + short_tx_content_size
tx_start_index = tx_item_start + tx_item_length
tx_count += 1
list_of_txs_prefix_bytes = rlp_utils.get_length_prefix_list(
content_size)
buf.appendleft(list_of_txs_prefix_bytes)
content_size += len(list_of_txs_prefix_bytes)
buf.appendleft(block_hdr_full_bytes)
content_size += len(block_hdr_full_bytes)
buf.append(remaining_bytes)
content_size += len(remaining_bytes)
compact_block_msg_prefix = rlp_utils.get_length_prefix_list(
content_size)
buf.appendleft(compact_block_msg_prefix)
content_size += len(compact_block_msg_prefix)
short_ids_bytes = compact_block_short_ids_serializer.serialize_short_ids_into_bytes(
used_short_ids)
buf.append(short_ids_bytes)
content_size += constants.UL_ULL_SIZE_IN_BYTES
offset_buf = struct.pack("<Q", content_size)
buf.appendleft(offset_buf)
content_size += len(short_ids_bytes)
# Parse it into the bloXroute message format and send it along
block = bytearray(content_size)
off = 0
for blob in buf:
next_off = off + len(blob)
block[off:next_off] = blob
off = next_off
bx_block_hash = convert.bytes_to_hex(crypto.double_sha256(block))
original_size = len(block_msg.rawbytes())
block_info = BlockInfo(block_msg.block_hash(), used_short_ids,
compress_start_datetime,
datetime.datetime.utcnow(),
(time.time() - compress_start_timestamp) * 1000,
tx_count, bx_block_hash,
convert.bytes_to_hex(prev_block_bytes),
original_size, content_size,
100 - float(content_size) / original_size * 100)
return memoryview(block), block_info
