115 lines
4.1 KiB
Python
115 lines
4.1 KiB
Python
import logging
|
|
import asyncio
|
|
from asyncio import CancelledError
|
|
from itertools import cycle
|
|
|
|
from aiorpcx import ClientSession as BaseClientSession
|
|
|
|
from torba import __version__
|
|
from torba.stream import StreamController
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
class ClientSession(BaseClientSession):
|
|
|
|
def __init__(self, *args, network, **kwargs):
|
|
self.network = network
|
|
super().__init__(*args, **kwargs)
|
|
self._on_disconnect_controller = StreamController()
|
|
self.on_disconnected = self._on_disconnect_controller.stream
|
|
self.bw_limit = self.framer.max_size = self.max_errors = 1 << 32
|
|
|
|
async def handle_request(self, request):
|
|
controller = self.network.subscription_controllers[request.method]
|
|
controller.add(request.args)
|
|
|
|
def connection_lost(self, exc):
|
|
super().connection_lost(exc)
|
|
self._on_disconnect_controller.add(True)
|
|
|
|
|
|
class BaseNetwork:
|
|
|
|
def __init__(self, ledger):
|
|
self.config = ledger.config
|
|
self.client: ClientSession = 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,
|
|
}
|
|
|
|
async def start(self):
|
|
self.running = True
|
|
delay = 0.0
|
|
for server in cycle(self.config['default_servers']):
|
|
connection_string = '{}:{}'.format(*server)
|
|
self.client = ClientSession(*server, network=self)
|
|
try:
|
|
await self.client.create_connection()
|
|
await self.ensure_server_version()
|
|
log.info("Successfully connected to SPV wallet server: %s", connection_string)
|
|
self._on_connected_controller.add(True)
|
|
delay = 0.0
|
|
await self.client.on_disconnected.first
|
|
except (Exception, CancelledError): # pylint: disable=broad-except
|
|
log.exception("Connecting to %s raised an exception:", connection_string)
|
|
if not self.running:
|
|
return
|
|
elif self.client:
|
|
await self.client.close()
|
|
self.client.connection.cancel_pending_requests()
|
|
await asyncio.sleep(delay)
|
|
delay = min(delay + 1.0, 10.0)
|
|
|
|
async def stop(self):
|
|
self.running = False
|
|
if self.is_connected:
|
|
disconnected = self.client.on_disconnected.first
|
|
await self.client.close()
|
|
await disconnected
|
|
|
|
@property
|
|
def is_connected(self):
|
|
return self.client is not None and not self.client.is_closing()
|
|
|
|
def rpc(self, list_or_method, *args):
|
|
if self.is_connected:
|
|
return self.client.send_request(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)
|