214 lines
7.4 KiB
Python
214 lines
7.4 KiB
Python
import json
|
|
import socket
|
|
import logging
|
|
from itertools import cycle
|
|
from twisted.internet import defer, reactor, protocol
|
|
from twisted.application.internet import ClientService, CancelledError
|
|
from twisted.internet.endpoints import clientFromString
|
|
from twisted.protocols.basic import LineOnlyReceiver
|
|
|
|
from torba import __version__
|
|
from torba.stream import StreamController
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
class StratumClientProtocol(LineOnlyReceiver):
|
|
delimiter = b'\n'
|
|
MAX_LENGTH = 2000000
|
|
|
|
def __init__(self):
|
|
self.request_id = 0
|
|
self.lookup_table = {}
|
|
self.session = {}
|
|
self.network = None
|
|
|
|
self.on_disconnected_controller = StreamController()
|
|
self.on_disconnected = self.on_disconnected_controller.stream
|
|
|
|
def _get_id(self):
|
|
self.request_id += 1
|
|
return self.request_id
|
|
|
|
@property
|
|
def _ip(self):
|
|
return self.transport.getPeer().host
|
|
|
|
def get_session(self):
|
|
return self.session
|
|
|
|
def connectionMade(self):
|
|
try:
|
|
self.transport.setTcpNoDelay(True)
|
|
self.transport.setTcpKeepAlive(True)
|
|
if hasattr(socket, "TCP_KEEPIDLE"):
|
|
self.transport.socket.setsockopt(
|
|
socket.SOL_TCP, socket.TCP_KEEPIDLE, 120
|
|
# Seconds before sending keepalive probes
|
|
)
|
|
else:
|
|
log.debug("TCP_KEEPIDLE not available")
|
|
if hasattr(socket, "TCP_KEEPINTVL"):
|
|
self.transport.socket.setsockopt(
|
|
socket.SOL_TCP, socket.TCP_KEEPINTVL, 1
|
|
# Interval in seconds between keepalive probes
|
|
)
|
|
else:
|
|
log.debug("TCP_KEEPINTVL not available")
|
|
if hasattr(socket, "TCP_KEEPCNT"):
|
|
self.transport.socket.setsockopt(
|
|
socket.SOL_TCP, socket.TCP_KEEPCNT, 5
|
|
# Failed keepalive probles before declaring other end dead
|
|
)
|
|
else:
|
|
log.debug("TCP_KEEPCNT not available")
|
|
|
|
except Exception as err: # pylint: disable=broad-except
|
|
# Supported only by the socket transport,
|
|
# but there's really no better place in code to trigger this.
|
|
log.warning("Error setting up socket: %s", err)
|
|
|
|
def connectionLost(self, reason=None):
|
|
self.on_disconnected_controller.add(True)
|
|
|
|
def lineReceived(self, line):
|
|
log.debug('received: %s', line)
|
|
|
|
try:
|
|
message = json.loads(line)
|
|
except (ValueError, TypeError):
|
|
raise ValueError("Cannot decode message '{}'".format(line.strip()))
|
|
|
|
if message.get('id'):
|
|
try:
|
|
d = self.lookup_table.pop(message['id'])
|
|
if message.get('error'):
|
|
d.errback(RuntimeError(message['error']))
|
|
else:
|
|
d.callback(message.get('result'))
|
|
except KeyError:
|
|
raise LookupError(
|
|
"Lookup for deferred object for message ID '{}' failed.".format(message['id']))
|
|
elif message.get('method') in self.network.subscription_controllers:
|
|
controller = self.network.subscription_controllers[message['method']]
|
|
controller.add(message.get('params'))
|
|
else:
|
|
log.warning("Cannot handle message '%s'", line)
|
|
|
|
def rpc(self, method, *args):
|
|
message_id = self._get_id()
|
|
message = json.dumps({
|
|
'id': message_id,
|
|
'method': method,
|
|
'params': args
|
|
})
|
|
log.debug('sent: %s', message)
|
|
self.sendLine(message.encode('latin-1'))
|
|
d = self.lookup_table[message_id] = defer.Deferred()
|
|
return d
|
|
|
|
|
|
class StratumClientFactory(protocol.ClientFactory):
|
|
|
|
protocol = StratumClientProtocol
|
|
|
|
def __init__(self, network):
|
|
self.network = network
|
|
self.client = None
|
|
|
|
def buildProtocol(self, addr):
|
|
client = self.protocol()
|
|
client.factory = self
|
|
client.network = self.network
|
|
self.client = client
|
|
return client
|
|
|
|
|
|
class BaseNetwork:
|
|
|
|
def __init__(self, ledger):
|
|
self.config = ledger.config
|
|
self.client = None
|
|
self.service = None
|
|
self.running = False
|
|
|
|
self._on_connected_controller = StreamController()
|
|
self.on_connected = self._on_connected_controller.stream
|
|
|
|
self._on_header_controller = StreamController()
|
|
self.on_header = self._on_header_controller.stream
|
|
|
|
self._on_status_controller = StreamController()
|
|
self.on_status = self._on_status_controller.stream
|
|
|
|
self.subscription_controllers = {
|
|
'blockchain.headers.subscribe': self._on_header_controller,
|
|
'blockchain.address.subscribe': self._on_status_controller,
|
|
}
|
|
|
|
@defer.inlineCallbacks
|
|
def start(self):
|
|
self.running = True
|
|
for server in cycle(self.config['default_servers']):
|
|
connection_string = 'tcp:{}:{}'.format(*server)
|
|
endpoint = clientFromString(reactor, connection_string)
|
|
log.debug("Attempting connection to SPV wallet server: %s", connection_string)
|
|
self.service = ClientService(endpoint, StratumClientFactory(self))
|
|
self.service.startService()
|
|
try:
|
|
self.client = yield self.service.whenConnected(failAfterFailures=2)
|
|
yield self.ensure_server_version()
|
|
log.info("Successfully connected to SPV wallet server: %s", connection_string)
|
|
self._on_connected_controller.add(True)
|
|
yield self.client.on_disconnected.first
|
|
except CancelledError:
|
|
return
|
|
except Exception: # pylint: disable=broad-except
|
|
log.exception("Connecting to %s raised an exception:", connection_string)
|
|
finally:
|
|
self.client = None
|
|
if not self.running:
|
|
return
|
|
|
|
def stop(self):
|
|
self.running = False
|
|
if self.service is not None:
|
|
self.service.stopService()
|
|
if self.is_connected:
|
|
return self.client.on_disconnected.first
|
|
else:
|
|
return defer.succeed(True)
|
|
|
|
@property
|
|
def is_connected(self):
|
|
return self.client is not None and self.client.connected
|
|
|
|
def rpc(self, list_or_method, *args):
|
|
if self.is_connected:
|
|
return self.client.rpc(list_or_method, *args)
|
|
else:
|
|
raise ConnectionError("Attempting to send rpc request when connection is not available.")
|
|
|
|
def ensure_server_version(self, required='1.2'):
|
|
return self.rpc('server.version', __version__, required)
|
|
|
|
def broadcast(self, raw_transaction):
|
|
return self.rpc('blockchain.transaction.broadcast', raw_transaction)
|
|
|
|
def get_history(self, address):
|
|
return self.rpc('blockchain.address.get_history', address)
|
|
|
|
def get_transaction(self, tx_hash):
|
|
return self.rpc('blockchain.transaction.get', tx_hash)
|
|
|
|
def get_merkle(self, tx_hash, height):
|
|
return self.rpc('blockchain.transaction.get_merkle', tx_hash, height)
|
|
|
|
def get_headers(self, height, count=10000):
|
|
return self.rpc('blockchain.block.headers', height, count)
|
|
|
|
def subscribe_headers(self):
|
|
return self.rpc('blockchain.headers.subscribe', True)
|
|
|
|
def subscribe_address(self, address):
|
|
return self.rpc('blockchain.address.subscribe', address)
|