async def async_getheaders(self, param):
"""
Async. Return 20 latest block headers.
:param param: (string) empty: last 20 blocks headers. start_height,count or ,count (last N headers)
:return:
"""
try:
protocmd = commands_pb2.Command()
protocmd.Clear()
protocmd.command = commands_pb2.Command.getheaders
if param is None or param == 'None':
param = ''
if param == '':
blocks = await self.async_fetchall(SQL_BLOCKS_LAST, (config.BLOCK_SYNC_COUNT,))
else:
start, count = param.split(',')
if '' == start:
blocks = await self.async_fetchall(SQL_BLOCKS_LAST, (count,))
else:
blocks = await self.async_fetchall(SQL_BLOCKS_SYNC, (start, count))
for block in blocks:
block = PosBlock().from_dict(dict(block))
block.add_to_proto(protocmd)
return protocmd
except Exception as e:
self.app_log.error("SRV: async_getheaders: Error {}".format(e))
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
self.app_log.error('detail {} {} {}'.format(exc_type, fname, exc_tb.tb_lineno))
raise
async def async_getblock(self, a_height):
"""
Command id 14
returns the block of the given height.
:param a_height: int
:return: protocmd with the block if exists or None
"""
try:
protocmd = commands_pb2.Command()
protocmd.Clear()
protocmd.command = commands_pb2.Command.getblock
block = await self.async_fetchone(SQL_HEIGHT_BLOCK, (a_height,), as_dict=True)
if not block:
return protocmd
block = PosBlock().from_dict(dict(block))
# Add the block txs
txs = await self.async_fetchall(SQL_TXS_FOR_HEIGHT, (block.height,))
for tx in txs:
tx = PosMessage().from_dict(dict(tx))
block.txs.append(tx)
block.add_to_proto(protocmd)
return protocmd
except Exception as e:
self.app_log.error("SRV: async_getblock: Error {}".format(e))
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
self.app_log.error('detail {} {} {}'.format(exc_type, fname, exc_tb.tb_lineno))
raise
async def async_roundblocks(self, a_round):
"""
Command id 13
returns all blocks of the given round.
FR: Harmonize. this one needs a proto as output (proto command with list of blocks)
:param a_round:
:return: protocmd with all blocks
"""
try:
protocmd = commands_pb2.Command()
protocmd.Clear()
protocmd.command = commands_pb2.Command.roundblocks
blocks = await self.async_fetchall(SQL_ROUND_BLOCKS, (a_round, ))
for block in blocks:
block = PosBlock().from_dict(dict(block))
# Add the block txs
txs = await self.async_fetchall(SQL_TXS_FOR_HEIGHT,
(block.height, ))
for tx in txs:
tx = PosMessage().from_dict(dict(tx))
block.txs.append(tx)
block.add_to_proto(protocmd)
# check block integrity
if len(txs) != block.msg_count:
self.app_log.error(
"Only {} tx for block {} instead of {} announced".
format(len(txs), block.height, block.msg_count))
com_helpers.MY_NODE.stop()
return protocmd
except Exception as e:
self.app_log.error("SRV: async_roundblocks: Error {}".format(e))
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
self.app_log.error('detail {} {} {}'.format(
exc_type, fname, exc_tb.tb_lineno))
raise
async def async_blocksync(self, height):
"""
returns N blocks starting with the given height.
FR: Harmonize. this one needs a proto as output (proto command with list of blocks)
:param height:
:return:
"""
try:
protocmd = commands_pb2.Command()
protocmd.Clear()
protocmd.command = commands_pb2.Command.blocksync
blocks = await self.async_fetchall(
SQL_BLOCKS_SYNC, (height, config.BLOCK_SYNC_COUNT))
for block in blocks:
block = PosBlock().from_dict(dict(block))
# Add the block txs
txs = await self.async_fetchall(SQL_TXS_FOR_HEIGHT,
(block.height, ))
for tx in txs:
tx = PosMessage().from_dict(dict(tx))
block.txs.append(tx)
# check block integrity
if len(txs) != block.msg_count:
self.app_log.error(
"Only {} tx for block {} instead of {} announced".
format(len(txs), height, block.msg_count))
com_helpers.MY_NODE.stop()
block.add_to_proto(protocmd)
#print(protocmd)
return protocmd
except Exception as e:
self.app_log.error("SRV: async_blocksync: Error {}".format(e))
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
self.app_log.error('detail {} {} {}'.format(
exc_type, fname, exc_tb.tb_lineno))
raise