def rpccall_with_retry(self, method: str, *args):
""" Do the request and return the result.
Args:
method: The JSON-RPC method.
args: The encoded arguments expected by the method.
- Object arguments must be supplied as a dictionary.
- Quantity arguments must be hex encoded starting with '0x' and
without left zeros.
- Data arguments must be hex encoded starting with '0x'
"""
request = self.protocol.create_request(method, args)
request_serialized = request.serialize().encode()
for i, timeout in enumerate(timeout_two_stage(10, 3, 10)):
if self.stop_event and self.stop_event.is_set():
raise RaidenShuttingDown()
try:
reply = self.transport.send_message(request_serialized)
except (requests.exceptions.ConnectionError, InvalidReplyError):
log.info(
'Timeout in eth client connection to {}. Is the client offline? Trying '
'again in {}s.'.format(self.transport.endpoint, timeout))
else:
if self.stop_event and self.stop_event.is_set():
raise RaidenShuttingDown()
if i > 0:
log.info('Client reconnected')
jsonrpc_reply = self.protocol.parse_reply(reply)
if isinstance(jsonrpc_reply, JSONRPCSuccessResponse):
return jsonrpc_reply.result
elif isinstance(jsonrpc_reply, JSONRPCErrorResponse):
raise EthNodeCommunicationError(
jsonrpc_reply.error,
jsonrpc_reply._jsonrpc_error_code, # pylint: disable=protected-access
)
else:
raise EthNodeCommunicationError(
'Unknown type of JSONRPC reply')
gevent.sleep(timeout)
def middleware(method, params):
# raise exception when shutting down
if client.stop_event and client.stop_event.is_set():
raise RaidenShuttingDown()
try:
if web3.isConnected():
return make_request(method, params)
else:
raise EthNodeCommunicationError('Web3 provider not connected')
# the isConnected check doesn't currently catch JSON errors
# see https://github.com/ethereum/web3.py/issues/866
except JSONDecodeError:
raise EthNodeCommunicationError('Web3 provider not connected')
def retry_on_disconnect(self, *args, **kwargs):
for i, timeout in enumerate(timeout_two_stage(10, 3, 10)):
if self.stop_event and self.stop_event.is_set():
raise RaidenShuttingDown()
try:
result = func(self, *args, **kwargs)
if i > 0:
log.info('Client reconnected')
return result
except (requests.exceptions.ConnectionError, InvalidReplyError):
log.info(
'Timeout in eth client connection to {}. Is the client offline? Trying '
'again in {}s.'.format(self.transport.endpoint, timeout))
gevent.sleep(timeout)