import logging
import asyncio
import lbry
from unittest.mock import Mock
from lbry.wallet.network import Network
from lbry.wallet.orchstr8.node import SPVNode
from lbry.wallet.rpc import RPCSession
from lbry.testcase import IntegrationTestCase, AsyncioTestCase
class NetworkTests(IntegrationTestCase):
async def test_remote_height_updated_automagically(self):
initial_height = self.ledger.network.remote_height
await self.blockchain.generate(1)
await self.ledger.network.on_header.first
self.assertEqual(self.ledger.network.remote_height, initial_height + 1)
async def test_server_features(self):
self.assertDictEqual({
'genesis_hash': self.conductor.spv_node.coin_class.GENESIS_HASH,
'hash_function': 'sha256',
'hosts': {},
'protocol_max': '0.99.0',
'protocol_min': '0.54.0',
'pruning': None,
'description': '',
'payment_address': '',
'donation_address': '',
'daily_fee': '0',
'server_version': lbry.__version__}, await self.ledger.network.get_server_features())
await self.conductor.spv_node.stop()
payment_address, donation_address = await self.account.get_addresses(limit=2)
await self.conductor.spv_node.start(
self.conductor.blockchain_node,
extraconf={
'DESCRIPTION': 'Fastest server in the west.',
'PAYMENT_ADDRESS': payment_address,
'DONATION_ADDRESS': donation_address,
'DAILY_FEE': '42'
}
)
await self.ledger.network.on_connected.first
self.assertDictEqual({
'genesis_hash': self.conductor.spv_node.coin_class.GENESIS_HASH,
'hash_function': 'sha256',
'hosts': {},
'protocol_max': '0.99.0',
'protocol_min': '0.54.0',
'pruning': None,
'description': 'Fastest server in the west.',
'payment_address': payment_address,
'donation_address': donation_address,
'daily_fee': '42',
'server_version': lbry.__version__}, await self.ledger.network.get_server_features())
class ReconnectTests(IntegrationTestCase):
async def test_multiple_servers(self):
# we have a secondary node that connects later, so
node2 = SPVNode(self.conductor.spv_module, node_number=2)
self.ledger.network.config['default_servers'].append((node2.hostname, node2.port))
await asyncio.wait_for(self.ledger.stop(), timeout=1)
await asyncio.wait_for(self.ledger.start(), timeout=1)
self.ledger.network.session_pool.new_connection_event.clear()
await node2.start(self.blockchain)
# this is only to speed up the test as retrying would take 4+ seconds
for session in self.ledger.network.session_pool.sessions:
session.trigger_urgent_reconnect.set()
await asyncio.wait_for(self.ledger.network.session_pool.new_connection_event.wait(), timeout=1)
self.assertEqual(2, len(list(self.ledger.network.session_pool.available_sessions)))
self.assertTrue(self.ledger.network.is_connected)
switch_event = self.ledger.network.on_connected.first
await node2.stop(True)
# secondary down, but primary is ok, do not switch! (switches trigger new on_connected events)
with self.assertRaises(asyncio.TimeoutError):
await asyncio.wait_for(switch_event, timeout=1)
async def test_direct_sync(self):
await self.ledger.stop()
initial_height = self.ledger.local_height_including_downloaded_height
await self.blockchain.generate(100)
while self.conductor.spv_node.server.session_mgr.notified_height < initial_height + 99: # off by 1
await asyncio.sleep(0.1)
self.assertEqual(initial_height, self.ledger.local_height_including_downloaded_height)
# locks header processing so we make sure we are the only ones modifying it
async with self.ledger._header_processing_lock:
await self.ledger.headers.open()
await self.ledger.network.start()
await self.ledger.network.on_connected.first
await self.ledger.initial_headers_sync()
self.assertEqual(initial_height + 100, self.ledger.local_height_including_downloaded_height)
async def test_connection_drop_still_receives_events_after_reconnected(self):
address1 = await self.account.receiving.get_or_create_usable_address()
# disconnect and send a new tx, should reconnect and get it
self.ledger.network.client.connection_lost(Exception())
self.assertFalse(self.ledger.network.is_connected)
sendtxid = await self.blockchain.send_to_address(address1, 1.1337)
await asyncio.wait_for(self.on_transaction_id(sendtxid), 1.0) # mempool
await self.blockchain.generate(1)
await self.on_transaction_id(sendtxid) # confirmed
self.assertLess(self.ledger.network.client.response_time, 1) # response time properly set lower, we are fine
await self.assertBalance(self.account, '1.1337')
# is it real? are we rich!? let me see this tx...
d = self.ledger.network.get_transaction(sendtxid)
# what's that smoke on my ethernet cable? oh no!
master_client = self.ledger.network.client
self.ledger.network.client.connection_lost(Exception())
with self.assertRaises(asyncio.TimeoutError):
await d
self.assertIsNone(master_client.response_time) # response time unknown as it failed
# rich but offline? no way, no water, let's retry
with self.assertRaisesRegex(ConnectionError, 'connection is not available'):
await self.ledger.network.get_transaction(sendtxid)
# * goes to pick some water outside... * time passes by and another donation comes in
sendtxid = await self.blockchain.send_to_address(address1, 42)
await self.blockchain.generate(1)
# (this is just so the test doesn't hang forever if it doesn't reconnect)
if not self.ledger.network.is_connected:
await asyncio.wait_for(self.ledger.network.on_connected.first, timeout=1.0)
# omg, the burned cable still works! torba is fire proof!
await self.ledger.network.get_transaction(sendtxid)
async def test_timeout_then_reconnect(self):
# tests that it connects back after some failed attempts
await self.conductor.spv_node.stop()
self.assertFalse(self.ledger.network.is_connected)
await asyncio.sleep(0.2) # let it retry and fail once
await self.conductor.spv_node.start(self.conductor.blockchain_node)
await self.ledger.network.on_connected.first
self.assertTrue(self.ledger.network.is_connected)
async def test_online_but_still_unavailable(self):
# Edge case. See issue #2445 for context
self.assertIsNotNone(self.ledger.network.session_pool.fastest_session)
for session in self.ledger.network.session_pool.sessions:
session.response_time = None
self.assertIsNone(self.ledger.network.session_pool.fastest_session)
class ServerPickingTestCase(AsyncioTestCase):
async def _make_fake_server(self, latency=1.0, port=1):
# local fake server with artificial latency
class FakeSession(RPCSession):
async def handle_request(self, request):
await asyncio.sleep(latency)
if request.method == 'server.version':
return tuple(request.args)
return {'height': 1}
server = await self.loop.create_server(lambda: FakeSession(), host='127.0.0.1', port=port)
self.addCleanup(server.close)
return '127.0.0.1', port
async def _make_bad_server(self, port=42420):
async def echo(reader, writer):
while True:
writer.write(await reader.read())
server = await asyncio.start_server(echo, host='127.0.0.1', port=port)
self.addCleanup(server.close)
return '127.0.0.1', port
async def test_pick_fastest(self):
ledger = Mock(config={
'default_servers': [
# fast but unhealthy, should be discarded
await self._make_bad_server(),
('localhost', 1),
('example.that.doesnt.resolve', 9000),
await self._make_fake_server(latency=1.0, port=1340),
await self._make_fake_server(latency=0.1, port=1337),
await self._make_fake_server(latency=0.4, port=1339),
],
'connect_timeout': 3
})
network = Network(ledger)
self.addCleanup(network.stop)
asyncio.ensure_future(network.start())
await asyncio.wait_for(network.on_connected.first, timeout=1)
self.assertTrue(network.is_connected)
self.assertTupleEqual(network.client.server, ('127.0.0.1', 1337))
self.assertTrue(all([not session.is_closing() for session in network.session_pool.available_sessions]))
# ensure we are connected to all of them after a while
await asyncio.sleep(1)
self.assertEqual(len(list(network.session_pool.available_sessions)), 3)