def handle_blockmeta_request(self, request: BlockMetaDataRequest):
self.log.important(
"Masternode received BlockMetaDataRequest: {}".format(request))
# Get a list of block hashes up until this most recent block
# TODO get_child_block_hashes return an error/assertion/something if block cannot be found
child_hashes = BlockStorageDriver.get_child_block_hashes(
request.current_block_hash)
self.log.debugv(
"Got descended block hashes {} for block hash {}".format(
child_hashes, request.current_block_hash))
# If this hash could not be found or if it was the latest hash, no need to lookup any blocks
if not child_hashes:
self.log.debug(
"Requested block hash {} is already up to date".format(
request.current_block_hash))
reply = BlockMetaDataReply.create(block_metas=None)
return reply
# Build a BlockMetaData object for each descendant block
block_metas = []
for block_hash in child_hashes:
block_data = BlockStorageDriver.get_block(hash=block_hash,
include_number=False)
meta = BlockMetaData.create(**block_data)
block_metas.append(meta)
reply = BlockMetaDataReply.create(block_metas=block_metas)
return reply
def test_create_fails_with_invalid_blockmetas(self):
"""
Tests that an assertion is raised if BlockMetaDataReply.create(...) is called with a list that contains a
non BlockMetaData instance
"""
with self.assertRaises(Exception) as e:
reply = BlockMetaDataReply.create(block_metas=[b'ack'])
def handle_blockmeta_request(self, request: BlockMetaDataRequest,
envelope: Envelope):
vk = envelope.seal.verifying_key
assert vk in VKBook.get_delegates(
), "Got BlockMetaDataRequest from VK {} not in delegate VKBook!".format(
vk)
self.log.notice(
"Masternode received BlockMetaDataRequest from delegate {}\n...request={}"
.format(vk, request))
# Get a list of block hashes up until this most recent block
# TODO get_child_block_hashes return an error/assertion/something if block cannot be found
child_hashes = BlockStorageDriver.get_child_block_hashes(
request.current_block_hash)
self.log.debugv(
"Got descendant block hashes {} for block hash {}".format(
child_hashes, request.current_block_hash))
# If this hash could not be found or if it was the latest hash, no need to lookup any blocks
if not child_hashes:
self.log.debug(
"Requested block hash {} is already up to date".format(
request.current_block_hash))
reply = BlockMetaDataReply.create(block_metas=None)
return reply
# Build a BlockMetaData object for each descendant block
block_metas = []
for block_hash in child_hashes:
block_data = BlockStorageDriver.get_block(hash=block_hash,
include_number=False)
meta = BlockMetaData.create(**block_data)
block_metas.append(meta)
reply = BlockMetaDataReply.create(block_metas=block_metas)
return reply
def test_serialize_deserialize(self):
reply = BlockMetaDataReply.create(block_metas=self.block_metas)
clone = BlockMetaDataReply.from_bytes(reply.serialize())
self.assertEqual(clone, reply)
def test_create_with_invalid_blocks(self):
self.block_metas.append(self._bad_block())
reply = BlockMetaDataReply.create(block_metas=self.block_metas)
for expected, actual in zip(reply.block_metas, self.block_metas):
self.assertEqual(expected, actual)
def test_create_with_blocks(self):
reply = BlockMetaDataReply.create(block_metas=self.block_metas)
for expected, actual in zip(reply.block_metas, self.block_metas):
self.assertEqual(expected, actual)
def test_create_with_block_metas_none(self):
reply = BlockMetaDataReply.create(block_metas=None)
self.assertFalse(reply.block_metas)
def test_create_with_no_blocks(self):
reply = BlockMetaDataReply.create(block_metas=[])
self.assertFalse(reply.block_metas)