def run():
server_address = get_server_address()
print("Connecting to cartesi-machine-server at " + server_address)
with grpc.insecure_channel(server_address) as channel:
stub = cartesi_machine_pb2_grpc.MachineStub(channel)
content = bytes("Hello World!", "iso8859-1")
mem_address = TEST_DRIVES[0][START]
try:
request(stub, "Machine", make_new_machine_request())
request(stub, "GetRootHash", cartesi_machine_pb2.Void())
request(stub, "Run",
cartesi_machine_pb2.RunRequest(limit=500000000))
request(stub, "Step", cartesi_machine_pb2.Void())
request(
stub, "ReadMemory",
cartesi_machine_pb2.ReadMemoryRequest(address=mem_address,
length=len(content)))
request(
stub, "WriteMemory",
cartesi_machine_pb2.WriteMemoryRequest(address=mem_address,
data=content))
request(
stub, "GetProof",
cartesi_machine_pb2.GetProofRequest(address=mem_address,
log2_size=3))
request(stub, "Shutdown", cartesi_machine_pb2.Void())
except Exception as e:
print("An exception occurred:")
print(e)
print(type(e))
def CommunicateAddress(self, request, context):
try:
address = request.address
session_id = request.session_id
LOGGER.info(
"Received a CommunicateAddress request for session_id {} and address {}"
.format(session_id, address))
self.session_registry_manager.register_address_for_session(
session_id, address)
#Returning
return cartesi_machine_pb2.Void()
#No session with provided id
except SessionIdException as e:
LOGGER.error(e)
context.set_details("{}".format(e))
context.set_code(grpc.StatusCode.INVALID_ARGUMENT)
#Generic error catch
except Exception as e:
LOGGER.error("An exception occurred: {}\nTraceback: {}".format(
e, traceback.format_exc()))
context.set_details(
'An exception with message "{}" was raised!'.format(e))
context.set_code(grpc.StatusCode.UNKNOWN)
def wait_for_server_availability(session_id, address):
LOGGER.debug(
"Connecting to cartesi machine server from session '{}' in address '{}'"
.format(session_id, address))
with grpc.insecure_channel(address) as channel:
retry = 0
while retry < MAX_CONNECTION_ATTEMPTS:
try:
stub = cartesi_machine_pb2_grpc.MachineStub(channel)
response = stub.GetVersion(cartesi_machine_pb2.Void())
LOGGER.debug(
"Cartesi machine server version for session_id '{}' is '{}'"
.format(session_id, response))
break
except Exception:
LOGGER.warning(
"Cartesi machine server for session_id '{}' is not yet ready"
.format(session_id))
retry += 1
time.sleep(SLEEP_TIME)
if retry == MAX_CONNECTION_ATTEMPTS:
err_msg = "Cartesi machine server for session_id '{}' reached max connection attempts {}".format(
session_id, MAX_CONNECTION_ATTEMPTS)
LOGGER.error(err_msg)
raise CartesiMachineServerException(err_msg)
def rollback_machine(session_id, address):
LOGGER.debug(
"Connecting to cartesi machine server from session '{}' in address '{}'"
.format(session_id, address))
with grpc.insecure_channel(address) as channel:
stub = cartesi_machine_pb2_grpc.MachineStub(channel)
stub.Rollback(cartesi_machine_pb2.Void())
LOGGER.debug("Cartesi machine rolledback for session_id '{}'".format(
session_id))
def create_machine_snapshot(session_id, address):
LOGGER.debug(
"Connecting to cartesi machine server from session '{}' in address '{}'"
.format(session_id, address))
with grpc.insecure_channel(address) as channel:
stub = cartesi_machine_pb2_grpc.MachineStub(channel)
stub.Snapshot(cartesi_machine_pb2.Void())
LOGGER.debug(
"Cartesi machine snapshot created for session_id '{}'".format(
session_id))
def shutdown_cartesi_machine_server(session_id, address):
LOGGER.debug(
"Connecting to cartesi machine server from session '{}' in address '{}'"
.format(session_id, address))
with grpc.insecure_channel(address) as channel:
stub = cartesi_machine_pb2_grpc.MachineStub(channel)
response = stub.Shutdown(cartesi_machine_pb2.Void())
LOGGER.debug(
"Cartesi machine server shutdown for session_id '{}'".format(
session_id))
def get_machine_hash(session_id, address):
LOGGER.debug(
"Connecting to cartesi machine server from session '{}' in address '{}'"
.format(session_id, address))
with grpc.insecure_channel(address) as channel:
stub = cartesi_machine_pb2_grpc.MachineStub(channel)
LOGGER.debug(
"Asking for cartesi machine root hash for session_id '{}'".format(
session_id))
response = stub.GetRootHash(cartesi_machine_pb2.Void())
LOGGER.debug(
"Cartesi machine root hash retrieved for session_id '{}'".format(
session_id))
return response.hash
def run_machine(session_id, session_context, desired_cycle):
''' This function must be called only when the lock for the given session
is held by the caller
'''
current_cycle = session_context.cycle
LOGGER.debug("Current cycle: {}\nDesired cycle: {}".format(
current_cycle, desired_cycle))
if (desired_cycle < current_cycle):
raise ValueError(
"The given desired_cycle must not be smaller than the current_cycle"
)
response = None
LOGGER.debug(
"Connecting to cartesi machine server from session '{}' in address '{}'"
.format(session_id, session_context.address))
with grpc.insecure_channel(session_context.address) as channel:
stub = cartesi_machine_pb2_grpc.MachineStub(channel)
#Setting cycle for run batch
target_cycle = session_context.cycle + RUN_CYCLES_BATCH_SIZE
#If it`s beyond the desired cycle, truncate
if (target_cycle > desired_cycle):
target_cycle = desired_cycle
#Run loop
while (True):
#Run
LOGGER.debug(
"Running cartesi machine for session id {} with target cycle of {}, current cycle is {}"
.format(session_id, target_cycle, session_context.cycle))
response = stub.Run(
cartesi_machine_pb2.RunRequest(limit=target_cycle))
#Update tracked cycle and updated_at timestamp in the session context
session_context.cycle = response.mcycle
session_context.updated_at = time.time()
LOGGER.debug("Updated cycle of session '{}' to {}".format(
session_id, response.mcycle))
#Checking if machine halted
if response.iflags_h:
#Storing the halting cycle in session context to use in progress calculations
session_context.halt_cycle = session_context.cycle
LOGGER.debug("Session {} halted with payload {}".format(
session_id,
int.from_bytes(response.tohost.to_bytes(8, 'big')[2:],
byteorder='big')))
break
#Checking if the machine yielded
elif response.iflags_y:
#Parsing tohost to see if a progress command was given
#The command is the second byte in the tohost 8bytes register
cmd = response.tohost.to_bytes(8, 'big')[1]
payload = int.from_bytes(response.tohost.to_bytes(8,
'big')[2:],
byteorder='big')
if (cmd == 0):
#It was a progress command, storing the progress
session_context.app_progress = payload
LOGGER.debug("New progress for session {}: {}".format(
session_id, payload))
#Reset IflagsY to resume
stub.ResetIflagsY(cartesi_machine_pb2.Void())
else:
#Wasn't a progress command, just logging
LOGGER.debug(
"Session {} yielded with command {} and payload {}".
format(session_id, cmd, payload))
else:
#The machine reached the target_cycle, setting next one if it wasn't the desired cycle
if target_cycle == desired_cycle:
#It was, break the loop
break
#It wasn't, set the next target cycle
target_cycle += RUN_CYCLES_BATCH_SIZE
#If it`s beyond the desired cycle, truncate
if (target_cycle > desired_cycle):
target_cycle = desired_cycle
LOGGER.debug(
"Cartesi machine ran for session_id '{}' and desired final cycle of {}, current cycle is {}"
.format(session_id, desired_cycle, session_context.cycle))
return response