def test_new_view_message_is_not_sent_by_non_primary_when_view_change_certificate_is_reached(
internal_bus, external_bus, validators, primary,
view_change_service_builder, initial_view_no, some_item, is_master):
# TODO: Need to decide on how we handle this case
if not is_master:
return
next_view_no = initial_view_no + 1
primary_name = primary(next_view_no)
non_primary_name = some_item(validators, exclude=[primary_name])
service = view_change_service_builder(non_primary_name)
# start view change
internal_bus.send(NeedViewChange())
external_bus.sent_messages.clear()
# receive quorum of ViewChanges and ViewChangeAcks
non_primaries = [item for item in validators if item != primary_name]
vc = create_view_change(initial_view_no)
for vc_frm in non_primaries:
external_bus.process_incoming(
vc, generateName(vc_frm, service._data.inst_id))
for ack, ack_frm in create_view_change_acks(vc, vc_frm, non_primaries):
external_bus.process_incoming(
ack, generateName(ack_frm, service._data.inst_id))
# check that NewView hasn't been sent
assert all(not isinstance(msg, NewView)
for msg in external_bus.sent_messages)
def test_new_view_message_is_sent_by_primary_when_view_change_certificate_is_reached(
internal_bus, external_bus, validators, primary,
view_change_service_builder, initial_view_no, view_change_acks,
is_master):
# TODO: Need to decide on how we handle this case
if not is_master:
return
primary_name = primary(initial_view_no + 1)
service = view_change_service_builder(primary_name)
# start view change
internal_bus.send(NeedViewChange())
external_bus.sent_messages.clear()
# receive quorum of ViewChanges and ViewChangeAcks
non_primaries = [item for item in validators if item != primary_name]
vc = create_view_change(initial_view_no)
for vc_frm in non_primaries:
external_bus.process_incoming(
vc, generateName(vc_frm, service._data.inst_id))
for ack, ack_frm in view_change_acks(vc, vc_frm, primary_name,
len(validators) - 2):
external_bus.process_incoming(
ack, generateName(ack_frm, service._data.inst_id))
# check that NewView has been sent
assert len(external_bus.sent_messages) == 1
msg, dst = external_bus.sent_messages[0]
assert dst is None # message was broadcast
assert isinstance(msg, NewView)
assert msg.viewNo == initial_view_no + 1
def test_view_change_finished_is_sent_by_non_primary_once_view_change_certificate_is_reached_and_new_view_from_primary(
internal_bus, external_bus, validators, primary,
view_change_service_builder, initial_view_no, some_item, is_master):
# TODO: Need to decide on how we handle this case
if not is_master:
return
handler = Mock()
internal_bus.subscribe(NewViewAccepted, handler)
next_view_no = initial_view_no + 1
primary_name = primary(next_view_no)
non_primary_name = some_item(validators, exclude=[primary_name])
service = view_change_service_builder(non_primary_name)
vc = create_view_change(initial_view_no)
service._data.preprepared = vc.preprepared
service._data.prepared = vc.prepared
service._data.stable_checkpoint = vc.stableCheckpoint
service._data.checkpoints = vc.checkpoints
old_data = copy_shared_data(service._data)
# start view change
internal_bus.send(NeedViewChange())
external_bus.sent_messages.clear()
# receive quorum of ViewChanges and ViewChangeAcks
non_primaries = [item for item in validators if item != primary_name]
non_primaries = random.sample(non_primaries,
service._data.quorums.view_change.value)
new_view = create_new_view_from_vc(vc, non_primaries)
for vc_frm in non_primaries:
external_bus.process_incoming(
vc, generateName(vc_frm, service._data.inst_id))
for ack, ack_frm in create_view_change_acks(vc, vc_frm, non_primaries):
external_bus.process_incoming(
ack, generateName(ack_frm, service._data.inst_id))
# check that NewViewAccepted hasn't been sent if NewView is from non-primary
external_bus.process_incoming(
new_view, generateName(non_primary_name, service._data.inst_id))
handler.assert_not_called()
assert service._data.view_no == initial_view_no + 1
assert service._data.waiting_for_new_view
# check that NewViewAccepted has been sent if NewView is from primary
external_bus.process_incoming(
new_view, generateName(primary_name, service._data.inst_id))
expected_finish_vc = NewViewAccepted(view_no=initial_view_no + 1,
view_changes=new_view.viewChanges,
checkpoint=new_view.checkpoint,
batches=new_view.batches)
handler.assert_called_with(expected_finish_vc)
# check that shared data is updated
new_data = copy_shared_data(service._data)
check_service_changed_only_owned_fields_in_shared_data(
ViewChangeService, old_data, new_data)
assert service._data.view_no == initial_view_no + 1
assert not service._data.waiting_for_new_view
def test_send_instance_change_on_new_view_with_incorrect_checkpoint(
internal_bus, external_bus, validators, primary,
view_change_service_builder, initial_view_no, some_item, is_master):
# TODO: Need to decide on how we handle this case
if not is_master:
return
next_view_no = initial_view_no + 1
primary_name = primary(next_view_no)
non_primary_name = some_item(validators, exclude=[primary_name])
service = view_change_service_builder(non_primary_name)
vc = create_view_change(initial_view_no)
service._data.preprepared = vc.preprepared
service._data.prepared = vc.prepared
service._data.stable_checkpoint = vc.stableCheckpoint
service._data.checkpoints = vc.checkpoints
# start view change
internal_bus.send(NeedViewChange())
external_bus.sent_messages.clear()
# receive quorum of ViewChanges and ViewChangeAcks
non_primaries = [item for item in validators if item != primary_name]
non_primaries = random.sample(non_primaries,
service._data.quorums.view_change.value)
for vc_frm in non_primaries:
external_bus.process_incoming(
vc, generateName(vc_frm, service._data.inst_id))
for ack, ack_frm in create_view_change_acks(vc, vc_frm, non_primaries):
external_bus.process_incoming(
ack, generateName(ack_frm, service._data.inst_id))
cp = Checkpoint(instId=0,
viewNo=initial_view_no,
seqNoStart=0,
seqNoEnd=1000,
digest=cp_digest(1000))
new_view = create_new_view_from_vc(vc, non_primaries, checkpoint=cp)
# send NewView by Primary
init_network_msg_count = len(external_bus.sent_messages)
external_bus.process_incoming(
new_view, generateName(primary_name, service._data.inst_id))
# we don't go to new view, just send Instance Change
assert service._data.view_no == initial_view_no + 1
assert init_network_msg_count + 1 == len(external_bus.sent_messages)
msg, dst = external_bus.sent_messages[-1]
assert dst is None # broadcast
assert isinstance(msg, InstanceChange)
assert msg.viewNo == initial_view_no + 2
assert msg.reason == Suspicions.NEW_VIEW_INVALID_CHECKPOINTS.code
def process_need_view_change(self, msg: NeedViewChange):
logger.info("{} processing {}".format(self, msg))
# 1. calculate new viewno
view_no = msg.view_no
if view_no is None:
view_no = self._data.view_no + 1
# 2. Do cleanup before new view change starts
self._clean_on_view_change_start()
# 3. Update shared data
self._data.view_no = view_no
self._data.waiting_for_new_view = True
old_primary = self._data.primary_name
self._data.primary_name = None
if not self._data.is_master:
self._data.master_reordered_after_vc = False
return
# Only the master primary is selected at the beginning of view change as we need to get a NEW_VIEW and do re-ordering on master
# Backup primaries will not be selected (and backups will not order) until re-ordering of txns from previous view on master is finished
# More precisely, it will be done after the first batch in a new view is committed
# This is done so as N and F may change as a result of NODE txns ordered in last view,
# so we need a synchronous point of updating N, F, number of replicas and backup primaris
# Beginning of view (when the first batch in a view is ordered) is such a point.
self._data.primary_name = generateName(
self._primaries_selector.select_master_primary(self._data.view_no),
self._data.inst_id)
if old_primary and self._data.primary_name == old_primary:
logger.info("Selected master primary is the same with the "
"current master primary (new_view {}). "
"Propose a new view {}".format(self._data.view_no,
self._data.view_no + 1))
self._propose_view_change(Suspicions.INCORRECT_NEW_PRIMARY)
logger.info(
"{} started view change to view {}. Expected Master Primary: {}".
format(self._data.name, self._data.view_no,
self._data.primary_name))
# 4. Build ViewChange message
vc = self._build_view_change_msg()
# 5. Send ViewChangeStarted via internal bus to update other services
logger.info("{} sending {}".format(self, vc))
self._bus.send(ViewChangeStarted(view_no=self._data.view_no))
# 6. Send ViewChange msg to other nodes (via external bus)
self._network.send(vc)
self.view_change_votes.add_view_change(vc, self._data.name)
# 7. Unstash messages for view change
self._router.process_all_stashed(STASH_WAITING_VIEW_CHANGE)
self._stashed_vc_msgs.clear()
# 8. Restart instance change timer
self._resend_inst_change_timer.stop()
self._resend_inst_change_timer.start()
def test_send_reply_on_old_view_pre_prepares_request(
external_bus, orderer, initial_view_no, stored_old_view_pre_prepares,
requested_old_view_pre_prepares):
# Setup
orderer._data.view_no = initial_view_no + 2
orderer._update_old_view_preprepares(stored_old_view_pre_prepares)
# Receive OldViewPrePrepareRequest req
batches = [
preprepare_to_batch_id(pp) for pp in requested_old_view_pre_prepares
]
req = OldViewPrePrepareRequest(0, batches)
frm = "node1"
orderer._network.process_incoming(req,
generateName(frm, orderer._data.inst_id))
# Check that OldViewPrePrepareReply is sent for all requested PrePrepares
if not orderer.is_master:
assert len(external_bus.sent_messages) == 0
return
# equal to set's union operation
expected_pps = [
i for i in stored_old_view_pre_prepares
if i in requested_old_view_pre_prepares
]
expected_pps = sorted(expected_pps, key=lambda pp: pp.ppSeqNo)
check_reply_old_view_preprepares_sent(external_bus, frm, expected_pps)
def __init__(self,
node_count: int = 4,
random: Optional[SimRandom] = None):
self._random = random if random else DefaultSimRandom()
self._timer = MockTimer()
self._network = SimNetwork(self._timer, self._random,
self._serialize_deserialize)
self._nodes = []
validators = genNodeNames(node_count)
# ToDo: maybe it should be a random too?
primary_name = validators[0]
genesis_txns = create_pool_txn_data(
node_names=validators,
crypto_factory=create_default_bls_crypto_factory(),
get_free_port=partial(random.integer, 9000, 9999))['txns']
for name in validators:
# TODO: emulate it the same way as in Replica, that is sender must have 'node_name:inst_id' form
replica_name = generateName(name, 0)
handler = partial(self.network._send_message, replica_name)
write_manager = create_test_write_req_manager(name, genesis_txns)
write_manager.node_reg_handler.node_reg_at_beginning_of_view[
0] = validators
replica = ReplicaService(replica_name,
validators,
primary_name,
self._timer,
InternalBus(),
self.network.create_peer(name, handler),
write_manager=write_manager,
bls_bft_replica=MockBlsBftReplica())
replica.config.NEW_VIEW_TIMEOUT = 30 * 1000
self._nodes.append(replica)
def test_non_primary_responds_to_view_change_message_with_view_change_ack_to_new_primary(
internal_bus, external_bus, some_item, other_item, validators, primary,
view_change_service_builder, initial_view_no, is_master):
# TODO: Need to decide on how we handle this case
if not is_master:
return
next_view_no = initial_view_no + 1
non_primary_name = some_item(validators, exclude=[primary(next_view_no)])
service = view_change_service_builder(non_primary_name)
internal_bus.send(NeedViewChange())
external_bus.sent_messages.clear()
vc = create_view_change(initial_view_no)
frm = other_item(validators, exclude=[non_primary_name])
external_bus.process_incoming(vc, generateName(frm, service._data.inst_id))
assert len(external_bus.sent_messages) == 1
msg, dst = external_bus.sent_messages[0]
assert dst == [getNodeName(service._data.primary_name)]
assert isinstance(msg, ViewChangeAck)
assert msg.viewNo == vc.viewNo
assert msg.name == frm
assert msg.digest == view_change_digest(vc)
def add_new_node(self, name):
if name not in self.validators:
self.validators.append(name)
# TODO: emulate it the same way as in Replica, that is sender must have 'node_name:inst_id' form
replica_name = generateName(name, 0)
handler = partial(self.network._send_message, replica_name)
write_manager = create_test_write_req_manager(name, self._genesis_txns)
write_manager.node_reg_handler.committed_node_reg_at_beginning_of_view[0] = self._genesis_validators
write_manager.node_reg_handler.uncommitted_node_reg_at_beginning_of_view[0] = self._genesis_validators
_internal_bus = InternalBus()
self._internal_buses[name] = _internal_bus
self._subscribe_to_internal_msgs(name)
replica = ReplicaService(replica_name,
self.validators,
self._primary_name,
self._timer,
_internal_bus,
self.network.create_peer(name, handler),
write_manager=write_manager,
bls_bft_replica=MockBlsBftReplica())
replica._data.node_mode = Mode.participating
self._nodes.append(replica)
self._update_connecteds()
logger.info("Node {} was added into pool".format(name))
def test_do_not_send_instance_change_on_timeout_when_multiple_view_change_finished_on_time(internal_bus, external_bus,
validators,
primary,
view_change_service_builder,
timer,
initial_view_no,
is_master):
# TODO: Need to decide on how we handle this case
if not is_master:
return
primary_name = primary(initial_view_no + 2)
service = view_change_service_builder(primary_name)
# start first view change
internal_bus.send(NeedViewChange())
# start second view change
internal_bus.send(NeedViewChange())
external_bus.sent_messages.clear()
# receive quorum of ViewChanges and ViewChangeAcks
non_primaries = [item for item in validators if item != primary_name]
vc = create_view_change(initial_view_no + 1)
service._data.checkpoints.append(Checkpoint(instId=0,
viewNo=initial_view_no + 1,
seqNoStart=0,
seqNoEnd=DEFAULT_STABLE_CHKP,
digest=cp_digest(DEFAULT_STABLE_CHKP)))
for vc_frm in non_primaries:
external_bus.process_incoming(vc, generateName(vc_frm, service._data.inst_id))
for ack, ack_frm in create_view_change_acks(vc, vc_frm, non_primaries):
external_bus.process_incoming(ack, generateName(ack_frm, service._data.inst_id))
# check that view change is finished
assert service._data.view_no == initial_view_no + 2
assert not service._data.waiting_for_new_view
assert len(external_bus.sent_messages) == 1
msg, dst = external_bus.sent_messages[0]
assert isinstance(msg, NewView)
# make sure view change hasn't been started again
timer.sleep(service._config.NEW_VIEW_TIMEOUT + 1)
assert service._data.view_no == initial_view_no + 2
assert len(external_bus.sent_messages) == 1
msg, dst = external_bus.sent_messages[0]
assert isinstance(msg, NewView)
def process_need_view_change(self, msg: NeedViewChange):
self._logger.info("{} processing {}".format(self, msg))
# 1. calculate new viewno
view_no = msg.view_no
if view_no is None:
view_no = self._data.view_no + 1
# 2. Do cleanup before new view change starts
self._clean_on_view_change_start()
# 3. Update shared data
self._data.view_no = view_no
self._data.waiting_for_new_view = True
self._data.primaries = self._primaries_selector.select_primaries(
view_no=self._data.view_no,
instance_count=self._data.quorums.f + 1,
validators=self._data.validators)
for i, primary_name in enumerate(self._data.primaries):
self._logger.display(
"{} selected primary {} for instance {} (view {})".format(
PRIMARY_SELECTION_PREFIX, primary_name, i,
self._data.view_no),
extra={
"cli": "ANNOUNCE",
"tags": ["node-election"]
})
old_primary = self._data.primary_name
self._data.primary_name = generateName(
self._data.primaries[self._data.inst_id], self._data.inst_id)
if not self._data.is_master:
return
if old_primary and self._data.primary_name == old_primary:
self._logger.info("Selected master primary is the same with the "
"current master primary (new_view {}). "
"Propose a new view {}".format(
self._data.view_no, self._data.view_no + 1))
self._propose_view_change(Suspicions.INCORRECT_NEW_PRIMARY.code)
# 4. Build ViewChange message
vc = self._build_view_change_msg()
# 5. Send ViewChangeStarted via internal bus to update other services
self._logger.info("{} sending {}".format(self, vc))
self._bus.send(ViewChangeStarted(view_no=self._data.view_no))
# 6. Send ViewChange msg to other nodes (via external bus)
self._network.send(vc)
self.view_change_votes.add_view_change(vc, self._data.name)
# 7. Unstash messages for view change
self._router.process_all_stashed(STASH_WAITING_VIEW_CHANGE)
# 8. Restart instance change timer
self._resend_inst_change_timer.stop()
self._resend_inst_change_timer.start()
def check_backup_primaries():
assert delayed_node.replicas[BACKUP_INST_ID]._consensus_data.primary_name is None
assert delayed_node.master_replica.last_ordered_3pc[1] == master_pp_seq_no_before
assert all(
n.replicas[BACKUP_INST_ID]._consensus_data.primary_name == generateName(delayed_node.name,
instId=BACKUP_INST_ID)
for n in fast_nodes
)
def __init__(self,
name: str,
validators: List[str],
primary_name: str,
timer: TimerService,
bus: InternalBus,
network: ExternalBus,
write_manager: WriteRequestManager,
bls_bft_replica: BlsBftReplica = None):
# ToDo: Maybe ConsensusSharedData should be initiated before and passed already prepared?
self._internal_bus = bus
self._data = ConsensusSharedData(name, validators, 0)
self._data.primary_name = generateName(primary_name,
self._data.inst_id)
self.config = getConfig()
self.stasher = StashingRouter(self.config.REPLICA_STASH_LIMIT,
buses=[bus, network])
self._write_manager = write_manager
self._primaries_selector = RoundRobinNodeRegPrimariesSelector(
self._write_manager.node_reg_handler)
self._orderer = OrderingService(
data=self._data,
timer=timer,
bus=bus,
network=network,
write_manager=self._write_manager,
bls_bft_replica=bls_bft_replica,
freshness_checker=FreshnessChecker(
freshness_timeout=self.config.STATE_FRESHNESS_UPDATE_INTERVAL),
primaries_selector=self._primaries_selector,
stasher=self.stasher)
self._checkpointer = CheckpointService(self._data, bus, network,
self.stasher,
write_manager.database_manager)
self._view_changer = ViewChangeService(self._data, timer, bus, network,
self.stasher,
self._primaries_selector)
self._message_requestor = MessageReqService(self._data, bus, network)
self._add_ledgers()
# TODO: This is just for testing purposes only
self._data.checkpoints.append(
Checkpoint(instId=0,
viewNo=0,
seqNoStart=0,
seqNoEnd=0,
digest='4F7BsTMVPKFshM1MwLf6y23cid6fL3xMpazVoF9krzUw'))
# ToDo: it should be done in Zero-view stage.
write_manager.on_catchup_finished()
self._data.primaries = self._view_changer._primaries_selector.select_primaries(
self._data.view_no)
# ToDo: ugly way to understand node_reg changing
self._previous_node_reg = self._write_manager.node_reg_handler.committed_node_reg
bus.subscribe(Ordered, self.emulate_ordered_processing)
def validator(view_no):
validators = genNodeNames(4)
inst_id = 0
cd = ConsensusSharedData(generateName(validators[0], inst_id), validators,
inst_id, True)
cd.pp_seq_no = 1
cd.view_no = view_no
cd.node_mode = Mode.participating
return OrderingServiceMsgValidator(data=cd)
def validator(view_no):
validators = genNodeNames(4)
inst_id = 0
cd = ConsensusSharedData(generateName(validators[0], inst_id), validators, inst_id, True)
cd.pp_seq_no = 1
cd.view_no = view_no
cd.node_mode = Mode.participating
cd.node_status = Status.started
cd.prev_view_prepare_cert = cd.last_ordered_3pc[1]
return OrderingServiceMsgValidator(data=cd)
def test_process_preprepare_on_old_view_pre_prepares_reply(
external_bus, internal_bus, orderer, is_primary, initial_view_no,
pre_prepares):
# !!!SETUP!!!
orderer._data.view_no = initial_view_no + 1
new_view = create_new_view(
initial_view_no=initial_view_no,
stable_cp=200,
batches=create_batches_from_preprepares(pre_prepares))
orderer._data.new_view_votes.add_new_view(new_view,
orderer._data.primary_name)
orderer._data.prev_view_prepare_cert = new_view.batches[-1].pp_seq_no
# !!!EXECUTE!!!
rep = OldViewPrePrepareReply(0, [pp._asdict() for pp in pre_prepares])
orderer._network.process_incoming(
rep, generateName("node1", orderer._data.inst_id))
# !!!CHECK!!!
if not orderer.is_master:
# no re-ordering is expected on non-master
assert orderer._data.preprepared == []
assert orderer._data.prepared == []
return
# check that PPs were added
assert orderer._data.preprepared == [
BatchID(view_no=initial_view_no + 1,
pp_view_no=pp.viewNo,
pp_seq_no=pp.ppSeqNo,
pp_digest=pp.digest) for pp in pre_prepares
]
# check that sent_preprepares is updated in case of Primary and prePrepares in case of non-primary
updated_prepares_collection = orderer.prePrepares if not is_primary else orderer.sent_preprepares
non_updated_prepares_collection = orderer.sent_preprepares if not is_primary else orderer.prePrepares
for pp in pre_prepares:
new_pp = updateNamedTuple(pp,
viewNo=initial_view_no + 1,
originalViewNo=pp.viewNo)
assert (initial_view_no + 1,
new_pp.ppSeqNo) in updated_prepares_collection
assert updated_prepares_collection[(initial_view_no + 1,
new_pp.ppSeqNo)] == new_pp
assert not non_updated_prepares_collection
# check that Prepare is sent in case of non primary
if not is_primary:
check_prepares_sent(external_bus, pre_prepares, initial_view_no + 1)
else:
assert len(external_bus.sent_messages) == 0
# we don't have a quorum of Prepares yet
assert orderer._data.prepared == []
def test_primary_doesnt_respond_to_view_change_message(
some_item, validators, primary, external_bus, view_change_service_builder, initial_view_no,
view_change_message, is_master):
# TODO: Need to decide on how we handle this case
if not is_master:
return
name = primary(initial_view_no + 1)
service = view_change_service_builder(name)
vc = create_view_change(initial_view_no)
frm = some_item(validators, exclude=[name])
external_bus.process_incoming(vc, generateName(frm, service._data.inst_id))
assert len(external_bus.sent_messages) == 0
def _finish_view_change(self):
# Update shared data
self._data.waiting_for_new_view = False
self._data.prev_view_prepare_cert = self._data.new_view.batches[-1].pp_seq_no \
if self._data.new_view.batches else self._data.new_view.checkpoint.seqNoEnd
if f.PRIMARY.nm in self._data.new_view:
self._data.primary_name = generateName(self._data.new_view.primary,
self._data.inst_id)
logger.info("{} finished view change to view {}. Master Primary: {}".format(self._data.name,
self._data.view_no,
self._data.primary_name))
# Cancel View Change timeout task
self._resend_inst_change_timer.stop()
# send message to other services
self._bus.send(NewViewAccepted(view_no=self._data.new_view.viewNo,
view_changes=self._data.new_view.viewChanges,
checkpoint=self._data.new_view.checkpoint,
batches=self._data.new_view.batches))
self.last_completed_view_no = self._data.view_no
def __init__(self,
node_count: int = 4,
random: Optional[SimRandom] = None):
self._random = random if random else DefaultSimRandom()
self._timer = MockTimer()
self._network = SimNetwork(self._timer, self._random,
self._serialize_deserialize)
self._nodes = []
validators = genNodeNames(node_count)
# ToDo: maybe it should be a random too?
primary_name = validators[0]
genesis_txns = create_pool_txn_data(
node_names=validators,
crypto_factory=create_default_bls_crypto_factory(),
get_free_port=partial(random.integer, 9000, 9999))['txns']
for name in validators:
# TODO: emulate it the same way as in Replica, that is sender must have 'node_name:inst_id' form
replica_name = generateName(name, 0)
handler = partial(self.network._send_message, replica_name)
write_manager = create_test_write_req_manager(name, genesis_txns)
replica = ReplicaService(replica_name,
validators,
primary_name,
self._timer,
InternalBus(),
self.network.create_peer(name, handler),
write_manager=write_manager,
bls_bft_replica=MockBlsBftReplica())
# ToDo: For now, future_primary_handler is depended from the node.
# And for now we need to patching set_node_state functionality
future_primaries_handler = FuturePrimariesBatchHandler(
write_manager.database_manager,
FakeSomething(nodeReg={}, nodeIds=[]))
future_primaries_handler._get_primaries = lambda *args, **kwargs: replica._data.primaries
write_manager.register_batch_handler(future_primaries_handler)
# ToDo: also, it should be done at the zero-view stage.
write_manager.future_primary_handler.set_node_state()
replica.config.NEW_VIEW_TIMEOUT = 30 * 1000
self._nodes.append(replica)
def process_need_view_change(self, msg: NeedViewChange):
self._logger.info("{} processing {}".format(self, msg))
# 1. calculate new viewno
view_no = msg.view_no
if view_no is None:
view_no = self._data.view_no + 1
# 2. Do cleanup before new view change starts
self._clean_on_view_change_start()
# 3. Update shared data
self._data.view_no = view_no
self._data.waiting_for_new_view = True
self._data.primaries = self._primaries_selector.select_primaries(
view_no=self._data.view_no,
instance_count=self._data.quorums.f + 1,
validators=self._data.validators)
self._data.primary_name = generateName(
self._data.primaries[self._data.inst_id], self._data.inst_id)
if not self._data.is_master:
return
# 4. Build ViewChange message
vc = self._build_view_change_msg()
# 5. Send ViewChangeStarted via internal bus to update other services
self._logger.info("{} sending {}".format(self, vc))
self._bus.send(ViewChangeStarted(view_no=self._data.view_no))
# 6. Send ViewChange msg to other nodes (via external bus)
self._network.send(vc)
self.view_change_votes.add_view_change(vc, self._data.name)
# 7. Unstash messages for view change
self._router.process_all_stashed(STASH_WAITING_VIEW_CHANGE)
# 8. Restart instance change timer
self._resend_inst_change_timer.stop()
self._resend_inst_change_timer.start()
def sender_orderer(primary_orderer, sender, inst_id):
return generateName(sender, inst_id)
def _data(name):
data = ConsensusSharedData(generateName(name, 0), validators, 0, is_master)
data.view_no = initial_view_no
return data
def __init__(self, name: str, validators: List[str], primary_name: str,
timer: TimerService, bus: InternalBus, network: ExternalBus,
write_manager: WriteRequestManager,
bls_bft_replica: BlsBftReplica = None):
# ToDo: Maybe ConsensusSharedData should be initiated before and passed already prepared?
self._network = network
self._data = ConsensusSharedData(name, validators, 0)
self._data.primary_name = generateName(primary_name, self._data.inst_id)
self._timer = timer
self.config = getConfig()
self.stasher = StashingRouter(self.config.REPLICA_STASH_LIMIT, buses=[bus, network])
self._write_manager = write_manager
self._primaries_selector = RoundRobinNodeRegPrimariesSelector(self._write_manager.node_reg_handler)
self._freshness_checker = FreshnessChecker(freshness_timeout=self.config.STATE_FRESHNESS_UPDATE_INTERVAL)
for ledger_id in [POOL_LEDGER_ID, DOMAIN_LEDGER_ID, CONFIG_LEDGER_ID]:
self._freshness_checker.register_ledger(ledger_id=ledger_id,
initial_time=self.get_time_for_3pc_batch())
self._orderer = OrderingService(data=self._data,
timer=self._timer,
bus=bus,
network=network,
write_manager=self._write_manager,
bls_bft_replica=bls_bft_replica,
freshness_checker=self._freshness_checker,
get_time_for_3pc_batch=self.get_time_for_3pc_batch,
stasher=self.stasher)
self._checkpointer = CheckpointService(self._data, bus, network, self.stasher,
write_manager.database_manager)
self._view_changer = ViewChangeService(self._data, self._timer, bus, network, self.stasher, self._primaries_selector)
self._view_change_trigger = ViewChangeTriggerService(data=self._data,
timer=self._timer,
bus=bus,
network=network,
db_manager=write_manager.database_manager,
is_master_degraded=lambda: False,
stasher=self.stasher)
self._primary_connection_monitor = PrimaryConnectionMonitorService(data=self._data,
timer=self._timer,
bus=bus,
network=network)
self._freshness_monitor = FreshnessMonitorService(data=self._data,
timer=self._timer,
bus=bus,
network=network,
freshness_checker=self._freshness_checker,
get_time_for_3pc_batch=self.get_time_for_3pc_batch)
self._message_requestor = MessageReqService(self._data, bus, network)
self._add_ledgers()
# TODO: This is just for testing purposes only
self._data.checkpoints.append(
Checkpoint(instId=0, viewNo=0, seqNoStart=0, seqNoEnd=0,
digest='4F7BsTMVPKFshM1MwLf6y23cid6fL3xMpazVoF9krzUw'))
# ToDo: it should be done in Zero-view stage.
write_manager.on_catchup_finished()
# Simulate node behavior
self._internal_bus = bus
self._internal_bus.subscribe(NodeNeedViewChange, self.process_node_need_view_change)
self._internal_bus.subscribe(Ordered, self.emulate_ordered_processing)
# ToDo: ugly way to understand node_reg changing
self._previous_node_reg = self._write_manager.node_reg_handler.committed_node_reg
def _data(name):
data = ConsensusSharedData(generateName(name, 0), validators, 0,
is_master)
data.view_no = initial_view_no
data.checkpoints.update(initial_checkpoints)
return data