lbry-sdk/lbrynet/daemon/Components.py

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import os
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import asyncio
import logging
import treq
import math
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import binascii
from hashlib import sha256
from types import SimpleNamespace
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from twisted.internet import defer, threads, reactor, error
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import lbryschema
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from txupnp.upnp import UPnP
from lbrynet import conf
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from lbrynet.core.utils import DeferredDict
from lbrynet.core.PaymentRateManager import OnlyFreePaymentsManager
from lbrynet.core.RateLimiter import RateLimiter
from lbrynet.core.BlobManager import DiskBlobManager
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from lbrynet.core.StreamDescriptor import StreamDescriptorIdentifier, EncryptedFileStreamType
from lbrynet.wallet.manager import LbryWalletManager
from lbrynet.wallet.network import Network
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from lbrynet.core.server.BlobRequestHandler import BlobRequestHandlerFactory
from lbrynet.core.server.ServerProtocol import ServerProtocolFactory
from lbrynet.daemon.Component import Component
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from lbrynet.daemon.ExchangeRateManager import ExchangeRateManager
from lbrynet.database.storage import SQLiteStorage
from lbrynet.dht import node, hashannouncer
from lbrynet.file_manager.EncryptedFileManager import EncryptedFileManager
from lbrynet.lbry_file.client.EncryptedFileDownloader import EncryptedFileSaverFactory
from lbrynet.lbry_file.client.EncryptedFileOptions import add_lbry_file_to_sd_identifier
from lbrynet.reflector import ServerFactory as reflector_server_factory
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from lbrynet.core.utils import generate_id
log = logging.getLogger(__name__)
# settings must be initialized before this file is imported
DATABASE_COMPONENT = "database"
BLOB_COMPONENT = "blob_manager"
HEADERS_COMPONENT = "blockchain_headers"
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WALLET_COMPONENT = "wallet"
DHT_COMPONENT = "dht"
HASH_ANNOUNCER_COMPONENT = "hash_announcer"
STREAM_IDENTIFIER_COMPONENT = "stream_identifier"
FILE_MANAGER_COMPONENT = "file_manager"
PEER_PROTOCOL_SERVER_COMPONENT = "peer_protocol_server"
REFLECTOR_COMPONENT = "reflector"
UPNP_COMPONENT = "upnp"
EXCHANGE_RATE_MANAGER_COMPONENT = "exchange_rate_manager"
RATE_LIMITER_COMPONENT = "rate_limiter"
PAYMENT_RATE_COMPONENT = "payment_rate_manager"
def get_wallet_config():
wallet_type = GCS('wallet')
if wallet_type == conf.LBRYCRD_WALLET:
raise ValueError('LBRYcrd Wallet is no longer supported')
elif wallet_type != conf.LBRYUM_WALLET:
raise ValueError('Wallet Type {} is not valid'.format(wallet_type))
lbryum_servers = {address: {'t': str(port)}
for address, port in GCS('lbryum_servers')}
config = {
'auto_connect': True,
'chain': GCS('blockchain_name'),
'default_servers': lbryum_servers
}
if 'use_keyring' in conf.settings:
config['use_keyring'] = GCS('use_keyring')
if conf.settings['lbryum_wallet_dir']:
config['lbryum_path'] = GCS('lbryum_wallet_dir')
return config
class ConfigSettings:
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@staticmethod
def get_conf_setting(setting_name):
return conf.settings[setting_name]
@staticmethod
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def get_blobfiles_dir():
if conf.settings['BLOBFILES_DIR'] == "blobfiles":
return os.path.join(GCS("data_dir"), "blobfiles")
else:
log.info("Using non-default blobfiles directory: %s", conf.settings['BLOBFILES_DIR'])
return conf.settings['BLOBFILES_DIR']
@staticmethod
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def get_node_id():
return conf.settings.node_id
@staticmethod
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def get_external_ip():
from lbrynet.core.system_info import get_platform
platform = get_platform(get_ip=True)
return platform['ip']
# Shorthand for common ConfigSettings methods
CS = ConfigSettings
GCS = ConfigSettings.get_conf_setting
class DatabaseComponent(Component):
component_name = DATABASE_COMPONENT
def __init__(self, component_manager):
super().__init__(component_manager)
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self.storage = None
@property
def component(self):
return self.storage
@staticmethod
def get_current_db_revision():
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return 9
@staticmethod
def get_revision_filename():
return conf.settings.get_db_revision_filename()
@staticmethod
def _write_db_revision_file(version_num):
with open(conf.settings.get_db_revision_filename(), mode='w') as db_revision:
db_revision.write(str(version_num))
@defer.inlineCallbacks
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def start(self):
# check directories exist, create them if they don't
log.info("Loading databases")
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if not os.path.exists(GCS('download_directory')):
os.mkdir(GCS('download_directory'))
if not os.path.exists(GCS('data_dir')):
os.mkdir(GCS('data_dir'))
self._write_db_revision_file(self.get_current_db_revision())
log.debug("Created the db revision file: %s", self.get_revision_filename())
if not os.path.exists(CS.get_blobfiles_dir()):
os.mkdir(CS.get_blobfiles_dir())
log.debug("Created the blobfile directory: %s", str(CS.get_blobfiles_dir()))
if not os.path.exists(self.get_revision_filename()):
log.warning("db_revision file not found. Creating it")
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self._write_db_revision_file(self.get_current_db_revision())
# check the db migration and run any needed migrations
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with open(self.get_revision_filename(), "r") as revision_read_handle:
old_revision = int(revision_read_handle.read().strip())
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if old_revision > self.get_current_db_revision():
raise Exception('This version of lbrynet is not compatible with the database\n'
'Your database is revision %i, expected %i' %
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(old_revision, self.get_current_db_revision()))
if old_revision < self.get_current_db_revision():
from lbrynet.database.migrator import dbmigrator
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log.info("Upgrading your databases (revision %i to %i)", old_revision, self.get_current_db_revision())
yield threads.deferToThread(
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dbmigrator.migrate_db, GCS('data_dir'), old_revision, self.get_current_db_revision()
)
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self._write_db_revision_file(self.get_current_db_revision())
log.info("Finished upgrading the databases.")
# start SQLiteStorage
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self.storage = SQLiteStorage(GCS('data_dir'))
yield self.storage.setup()
@defer.inlineCallbacks
def stop(self):
yield self.storage.stop()
self.storage = None
HEADERS_URL = "https://headers.lbry.io/blockchain_headers_latest"
HEADER_SIZE = 112
class HeadersComponent(Component):
component_name = HEADERS_COMPONENT
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def __init__(self, component_manager):
super().__init__(component_manager)
self.headers_dir = os.path.join(conf.settings['lbryum_wallet_dir'], 'lbc_mainnet')
self.headers_file = os.path.join(self.headers_dir, 'headers')
self.old_file = os.path.join(conf.settings['lbryum_wallet_dir'], 'blockchain_headers')
self._downloading_headers = None
self._headers_progress_percent = None
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@property
def component(self):
return self
def get_status(self):
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return {} if not self._downloading_headers else {
'downloading_headers': self._downloading_headers,
'download_progress': self._headers_progress_percent
}
@defer.inlineCallbacks
def fetch_headers_from_s3(self):
def collector(data, h_file):
h_file.write(data)
local_size = float(h_file.tell())
final_size = float(final_size_after_download)
self._headers_progress_percent = math.ceil(local_size / final_size * 100)
local_header_size = self.local_header_file_size()
resume_header = {"Range": "bytes={}-".format(local_header_size)}
response = yield treq.get(HEADERS_URL, headers=resume_header)
got_406 = response.code == 406 # our file is bigger
final_size_after_download = response.length + local_header_size
if got_406:
log.warning("s3 is more out of date than we are")
# should have something to download and a final length divisible by the header size
elif final_size_after_download and not final_size_after_download % HEADER_SIZE:
s3_height = (final_size_after_download / HEADER_SIZE) - 1
local_height = self.local_header_file_height()
if s3_height > local_height:
if local_header_size:
log.info("Resuming download of %i bytes from s3", response.length)
with open(self.headers_file, "a+b") as headers_file:
yield treq.collect(response, lambda d: collector(d, headers_file))
else:
with open(self.headers_file, "wb") as headers_file:
yield treq.collect(response, lambda d: collector(d, headers_file))
log.info("fetched headers from s3 (s3 height: %i), now verifying integrity after download.", s3_height)
self._check_header_file_integrity()
else:
log.warning("s3 is more out of date than we are")
else:
log.error("invalid size for headers from s3")
def local_header_file_height(self):
return max((self.local_header_file_size() / HEADER_SIZE) - 1, 0)
def local_header_file_size(self):
if os.path.isfile(self.headers_file):
return os.stat(self.headers_file).st_size
return 0
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async def get_remote_height(self):
ledger = SimpleNamespace()
ledger.config = {
'default_servers': conf.settings['lbryum_servers'],
'data_path': conf.settings['lbryum_wallet_dir']
}
net = Network(ledger)
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first_connection = net.on_connected.first
asyncio.ensure_future(net.start())
await first_connection
remote_height = await net.get_server_height()
await net.stop()
return remote_height
async def should_download_headers_from_s3(self):
if conf.settings['blockchain_name'] != "lbrycrd_main":
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return False
self._check_header_file_integrity()
s3_headers_depth = conf.settings['s3_headers_depth']
if not s3_headers_depth:
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return False
local_height = self.local_header_file_height()
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remote_height = await self.get_remote_height()
log.info("remote height: %i, local height: %i", remote_height, local_height)
if remote_height > (local_height + s3_headers_depth):
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return True
return False
def _check_header_file_integrity(self):
# TODO: temporary workaround for usability. move to txlbryum and check headers instead of file integrity
if conf.settings['blockchain_name'] != "lbrycrd_main":
return
hashsum = sha256()
checksum_height, checksum = conf.settings['HEADERS_FILE_SHA256_CHECKSUM']
checksum_length_in_bytes = checksum_height * HEADER_SIZE
if self.local_header_file_size() < checksum_length_in_bytes:
return
with open(self.headers_file, "rb") as headers_file:
hashsum.update(headers_file.read(checksum_length_in_bytes))
current_checksum = hashsum.hexdigest()
if current_checksum != checksum:
msg = "Expected checksum {}, got {}".format(checksum, current_checksum)
log.warning("Wallet file corrupted, checksum mismatch. " + msg)
log.warning("Deleting header file so it can be downloaded again.")
os.unlink(self.headers_file)
elif (self.local_header_file_size() % HEADER_SIZE) != 0:
log.warning("Header file is good up to checkpoint height, but incomplete. Truncating to checkpoint.")
with open(self.headers_file, "rb+") as headers_file:
headers_file.truncate(checksum_length_in_bytes)
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@defer.inlineCallbacks
def start(self):
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conf.settings.ensure_wallet_dir()
if not os.path.exists(self.headers_dir):
os.mkdir(self.headers_dir)
if os.path.exists(self.old_file):
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log.warning("Moving old headers from %s to %s.", self.old_file, self.headers_file)
os.rename(self.old_file, self.headers_file)
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self._downloading_headers = yield f2d(self.should_download_headers_from_s3())
if self._downloading_headers:
try:
yield self.fetch_headers_from_s3()
except Exception as err:
log.error("failed to fetch headers from s3: %s", err)
finally:
self._downloading_headers = False
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def stop(self):
return defer.succeed(None)
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def d2f(deferred):
return deferred.asFuture(asyncio.get_event_loop())
def f2d(future):
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return defer.Deferred.fromFuture(asyncio.ensure_future(future))
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class WalletComponent(Component):
component_name = WALLET_COMPONENT
depends_on = [DATABASE_COMPONENT, HEADERS_COMPONENT]
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def __init__(self, component_manager):
super().__init__(component_manager)
self.wallet_manager = None
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@property
def component(self):
return self.wallet_manager
@defer.inlineCallbacks
def get_status(self):
if self.wallet_manager:
local_height = self.wallet_manager.network.get_local_height()
remote_height = self.wallet_manager.network.get_server_height()
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best_hash = yield f2d(self.wallet_manager.get_best_blockhash())
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defer.returnValue({
'blocks': max(local_height, 0),
'blocks_behind': max(remote_height - local_height, 0),
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'best_blockhash': best_hash,
'is_encrypted': self.wallet_manager.wallet.use_encryption,
'is_locked': not self.wallet_manager.is_wallet_unlocked,
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})
@defer.inlineCallbacks
def start(self):
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conf.settings.ensure_wallet_dir()
log.info("Starting torba wallet")
storage = self.component_manager.get_component(DATABASE_COMPONENT)
lbryschema.BLOCKCHAIN_NAME = conf.settings['blockchain_name']
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self.wallet_manager = yield f2d(LbryWalletManager.from_lbrynet_config(conf.settings, storage))
self.wallet_manager.old_db = storage
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yield f2d(self.wallet_manager.start())
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@defer.inlineCallbacks
def stop(self):
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yield f2d(self.wallet_manager.stop())
self.wallet_manager = None
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class BlobComponent(Component):
component_name = BLOB_COMPONENT
depends_on = [DATABASE_COMPONENT, DHT_COMPONENT]
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def __init__(self, component_manager):
super().__init__(component_manager)
self.blob_manager = None
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@property
def component(self):
return self.blob_manager
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def start(self):
storage = self.component_manager.get_component(DATABASE_COMPONENT)
dht_node = self.component_manager.get_component(DHT_COMPONENT)
self.blob_manager = DiskBlobManager(CS.get_blobfiles_dir(), storage, dht_node._dataStore)
return self.blob_manager.setup()
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def stop(self):
return self.blob_manager.stop()
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@defer.inlineCallbacks
def get_status(self):
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count = 0
if self.blob_manager:
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count = yield self.blob_manager.storage.count_finished_blobs()
defer.returnValue({
'finished_blobs': count
})
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class DHTComponent(Component):
component_name = DHT_COMPONENT
depends_on = [UPNP_COMPONENT]
def __init__(self, component_manager):
super().__init__(component_manager)
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self.dht_node = None
self.upnp_component = None
self.external_udp_port = None
self.external_peer_port = None
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@property
def component(self):
return self.dht_node
def get_status(self):
return {
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'node_id': binascii.hexlify(CS.get_node_id()),
'peers_in_routing_table': 0 if not self.dht_node else len(self.dht_node.contacts)
}
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@defer.inlineCallbacks
def start(self):
self.upnp_component = self.component_manager.get_component(UPNP_COMPONENT)
self.external_peer_port = self.upnp_component.upnp_redirects.get("TCP", GCS("peer_port"))
self.external_udp_port = self.upnp_component.upnp_redirects.get("UDP", GCS("dht_node_port"))
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node_id = CS.get_node_id()
if node_id is None:
node_id = generate_id()
self.dht_node = node.Node(
node_id=node_id,
udpPort=GCS('dht_node_port'),
externalUDPPort=self.external_udp_port,
externalIP=self.upnp_component.external_ip,
peerPort=self.external_peer_port
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)
self.dht_node.start_listening()
yield self.dht_node._protocol._listening
d = self.dht_node.joinNetwork(GCS('known_dht_nodes'))
d.addCallback(lambda _: self.dht_node.start_looping_calls())
d.addCallback(lambda _: log.info("Joined the dht"))
log.info("Started the dht")
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@defer.inlineCallbacks
def stop(self):
yield self.dht_node.stop()
class HashAnnouncerComponent(Component):
component_name = HASH_ANNOUNCER_COMPONENT
depends_on = [DHT_COMPONENT, DATABASE_COMPONENT]
def __init__(self, component_manager):
super().__init__(component_manager)
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self.hash_announcer = None
@property
def component(self):
return self.hash_announcer
@defer.inlineCallbacks
def start(self):
storage = self.component_manager.get_component(DATABASE_COMPONENT)
dht_node = self.component_manager.get_component(DHT_COMPONENT)
self.hash_announcer = hashannouncer.DHTHashAnnouncer(dht_node, storage)
yield self.hash_announcer.start()
@defer.inlineCallbacks
def stop(self):
yield self.hash_announcer.stop()
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def get_status(self):
return {
'announce_queue_size': 0 if not self.hash_announcer else len(self.hash_announcer.hash_queue)
}
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class RateLimiterComponent(Component):
component_name = RATE_LIMITER_COMPONENT
def __init__(self, component_manager):
super().__init__(component_manager)
self.rate_limiter = RateLimiter()
@property
def component(self):
return self.rate_limiter
def start(self):
self.rate_limiter.start()
return defer.succeed(None)
def stop(self):
self.rate_limiter.stop()
return defer.succeed(None)
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class StreamIdentifierComponent(Component):
component_name = STREAM_IDENTIFIER_COMPONENT
depends_on = [DHT_COMPONENT, RATE_LIMITER_COMPONENT, BLOB_COMPONENT, DATABASE_COMPONENT, WALLET_COMPONENT]
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def __init__(self, component_manager):
super().__init__(component_manager)
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self.sd_identifier = StreamDescriptorIdentifier()
@property
def component(self):
return self.sd_identifier
@defer.inlineCallbacks
def start(self):
dht_node = self.component_manager.get_component(DHT_COMPONENT)
rate_limiter = self.component_manager.get_component(RATE_LIMITER_COMPONENT)
blob_manager = self.component_manager.get_component(BLOB_COMPONENT)
storage = self.component_manager.get_component(DATABASE_COMPONENT)
wallet = self.component_manager.get_component(WALLET_COMPONENT)
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add_lbry_file_to_sd_identifier(self.sd_identifier)
file_saver_factory = EncryptedFileSaverFactory(
dht_node.peer_finder,
rate_limiter,
blob_manager,
storage,
wallet,
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GCS('download_directory')
)
yield self.sd_identifier.add_stream_downloader_factory(EncryptedFileStreamType, file_saver_factory)
def stop(self):
pass
class PaymentRateComponent(Component):
component_name = PAYMENT_RATE_COMPONENT
def __init__(self, component_manager):
super().__init__(component_manager)
self.payment_rate_manager = OnlyFreePaymentsManager()
@property
def component(self):
return self.payment_rate_manager
def start(self):
return defer.succeed(None)
def stop(self):
return defer.succeed(None)
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class FileManagerComponent(Component):
component_name = FILE_MANAGER_COMPONENT
depends_on = [DHT_COMPONENT, RATE_LIMITER_COMPONENT, BLOB_COMPONENT, DATABASE_COMPONENT, WALLET_COMPONENT,
STREAM_IDENTIFIER_COMPONENT, PAYMENT_RATE_COMPONENT]
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def __init__(self, component_manager):
super().__init__(component_manager)
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self.file_manager = None
@property
def component(self):
return self.file_manager
def get_status(self):
if not self.file_manager:
return
return {
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'managed_files': len(self.file_manager.lbry_files)
}
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@defer.inlineCallbacks
def start(self):
dht_node = self.component_manager.get_component(DHT_COMPONENT)
rate_limiter = self.component_manager.get_component(RATE_LIMITER_COMPONENT)
blob_manager = self.component_manager.get_component(BLOB_COMPONENT)
storage = self.component_manager.get_component(DATABASE_COMPONENT)
wallet = self.component_manager.get_component(WALLET_COMPONENT)
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sd_identifier = self.component_manager.get_component(STREAM_IDENTIFIER_COMPONENT)
payment_rate_manager = self.component_manager.get_component(PAYMENT_RATE_COMPONENT)
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log.info('Starting the file manager')
self.file_manager = EncryptedFileManager(dht_node.peer_finder, rate_limiter, blob_manager, wallet,
payment_rate_manager, storage, sd_identifier)
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yield self.file_manager.setup()
log.info('Done setting up file manager')
@defer.inlineCallbacks
def stop(self):
yield self.file_manager.stop()
class PeerProtocolServerComponent(Component):
component_name = PEER_PROTOCOL_SERVER_COMPONENT
depends_on = [UPNP_COMPONENT, DHT_COMPONENT, RATE_LIMITER_COMPONENT, BLOB_COMPONENT, WALLET_COMPONENT,
PAYMENT_RATE_COMPONENT]
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def __init__(self, component_manager):
super().__init__(component_manager)
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self.lbry_server_port = None
@property
def component(self):
return self.lbry_server_port
@defer.inlineCallbacks
def start(self):
wallet = self.component_manager.get_component(WALLET_COMPONENT)
upnp = self.component_manager.get_component(UPNP_COMPONENT)
peer_port = GCS('peer_port')
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query_handlers = {
handler.get_primary_query_identifier(): handler for handler in [
BlobRequestHandlerFactory(
self.component_manager.get_component(BLOB_COMPONENT),
wallet,
self.component_manager.get_component(PAYMENT_RATE_COMPONENT),
self.component_manager.analytics_manager
),
wallet.get_wallet_info_query_handler_factory(),
]
}
server_factory = ServerProtocolFactory(
self.component_manager.get_component(RATE_LIMITER_COMPONENT), query_handlers,
self.component_manager.get_component(DHT_COMPONENT).peer_manager
)
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try:
log.info("Peer protocol listening on TCP %i (ext port %i)", peer_port,
upnp.upnp_redirects.get("TCP", peer_port))
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self.lbry_server_port = yield reactor.listenTCP(peer_port, server_factory)
except error.CannotListenError as e:
import traceback
log.error("Couldn't bind to port %d. Visit lbry.io/faq/how-to-change-port for"
" more details.", peer_port)
log.error("%s", traceback.format_exc())
raise ValueError("%s lbrynet may already be running on your computer." % str(e))
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@defer.inlineCallbacks
def stop(self):
if self.lbry_server_port is not None:
self.lbry_server_port, old_port = None, self.lbry_server_port
log.info('Stop listening on port %s', old_port.port)
yield old_port.stopListening()
class ReflectorComponent(Component):
component_name = REFLECTOR_COMPONENT
depends_on = [DHT_COMPONENT, BLOB_COMPONENT, FILE_MANAGER_COMPONENT]
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def __init__(self, component_manager):
super().__init__(component_manager)
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self.reflector_server_port = GCS('reflector_port')
self.reflector_server = None
@property
def component(self):
return self.reflector_server
@defer.inlineCallbacks
def start(self):
log.info("Starting reflector server")
dht_node = self.component_manager.get_component(DHT_COMPONENT)
blob_manager = self.component_manager.get_component(BLOB_COMPONENT)
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file_manager = self.component_manager.get_component(FILE_MANAGER_COMPONENT)
reflector_factory = reflector_server_factory(dht_node.peer_manager, blob_manager, file_manager)
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try:
self.reflector_server = yield reactor.listenTCP(self.reflector_server_port, reflector_factory)
log.info('Started reflector on port %s', self.reflector_server_port)
except error.CannotListenError as e:
log.exception("Couldn't bind reflector to port %d", self.reflector_server_port)
raise ValueError("{} lbrynet may already be running on your computer.".format(e))
@defer.inlineCallbacks
def stop(self):
if self.reflector_server is not None:
log.info("Stopping reflector server")
self.reflector_server, p = None, self.reflector_server
yield p.stopListening
class UPnPComponent(Component):
component_name = UPNP_COMPONENT
def __init__(self, component_manager):
super().__init__(component_manager)
self._int_peer_port = GCS('peer_port')
self._int_dht_node_port = GCS('dht_node_port')
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self.use_upnp = GCS('use_upnp')
self.upnp = None
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self.upnp_redirects = {}
self.external_ip = None
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@property
def component(self):
return self
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@defer.inlineCallbacks
def _setup_redirects(self):
upnp_redirects = yield DeferredDict({
"UDP": self.upnp.get_next_mapping(self._int_dht_node_port, "UDP", "LBRY DHT port"),
"TCP": self.upnp.get_next_mapping(self._int_peer_port, "TCP", "LBRY peer port")
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})
self.upnp_redirects.update(upnp_redirects)
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@defer.inlineCallbacks
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def start(self):
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if not self.use_upnp:
self.external_ip = CS.get_external_ip()
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return
self.upnp = UPnP(self.component_manager.reactor, try_miniupnpc_fallback=True)
try:
found = yield self.upnp.discover()
except Exception as err:
log.warning("upnp discovery failed: %s", err)
found = False
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if found and not self.upnp.miniupnpc_runner:
log.info("set up redirects using txupnp")
elif found and self.upnp.miniupnpc_runner:
log.warning("failed to set up redirect with txupnp, miniupnpc fallback was successful")
if found:
try:
self.external_ip = yield self.upnp.get_external_ip()
yield self._setup_redirects()
except Exception as err:
log.warning("error trying to set up upnp: %s", err)
self.external_ip = CS.get_external_ip()
else:
self.external_ip = CS.get_external_ip()
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def stop(self):
return defer.DeferredList(
[self.upnp.delete_port_mapping(port, protocol) for protocol, port in self.upnp_redirects.items()]
)
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class ExchangeRateManagerComponent(Component):
component_name = EXCHANGE_RATE_MANAGER_COMPONENT
def __init__(self, component_manager):
Component.__init__(self, component_manager)
self.exchange_rate_manager = ExchangeRateManager()
@property
def component(self):
return self.exchange_rate_manager
@defer.inlineCallbacks
def start(self):
yield self.exchange_rate_manager.start()
@defer.inlineCallbacks
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def stop(self):
yield self.exchange_rate_manager.stop()