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https://github.com/LBRYFoundation/LBRY-Vault.git
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863 lines
33 KiB
Python
863 lines
33 KiB
Python
# Electrum - Lightweight Bitcoin Client
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# Copyright (c) 2011-2016 Thomas Voegtlin
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation files
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# (the "Software"), to deal in the Software without restriction,
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# including without limitation the rights to use, copy, modify, merge,
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# publish, distribute, sublicense, and/or sell copies of the Software,
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# and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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import time
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import queue
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import os
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import random
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import re
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from collections import defaultdict
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import threading
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import socket
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import json
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import sys
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import ipaddress
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import asyncio
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import dns
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import dns.resolver
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from aiorpcx import TaskGroup
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from . import util
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from .util import PrintError, print_error, aiosafe, bfh
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from .bitcoin import COIN
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from . import constants
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from . import blockchain
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from .interface import Interface, serialize_server, deserialize_server
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from .version import PROTOCOL_VERSION
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NODES_RETRY_INTERVAL = 60
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SERVER_RETRY_INTERVAL = 10
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def parse_servers(result):
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""" parse servers list into dict format"""
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servers = {}
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for item in result:
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host = item[1]
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out = {}
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version = None
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pruning_level = '-'
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if len(item) > 2:
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for v in item[2]:
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if re.match("[st]\d*", v):
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protocol, port = v[0], v[1:]
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if port == '': port = constants.net.DEFAULT_PORTS[protocol]
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out[protocol] = port
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elif re.match("v(.?)+", v):
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version = v[1:]
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elif re.match("p\d*", v):
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pruning_level = v[1:]
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if pruning_level == '': pruning_level = '0'
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if out:
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out['pruning'] = pruning_level
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out['version'] = version
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servers[host] = out
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return servers
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def filter_version(servers):
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def is_recent(version):
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try:
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return util.versiontuple(version) >= util.versiontuple(PROTOCOL_VERSION)
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except Exception as e:
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return False
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return {k: v for k, v in servers.items() if is_recent(v.get('version'))}
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def filter_noonion(servers):
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return {k: v for k, v in servers.items() if not k.endswith('.onion')}
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def filter_protocol(hostmap, protocol='s'):
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'''Filters the hostmap for those implementing protocol.
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The result is a list in serialized form.'''
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eligible = []
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for host, portmap in hostmap.items():
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port = portmap.get(protocol)
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if port:
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eligible.append(serialize_server(host, port, protocol))
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return eligible
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def pick_random_server(hostmap = None, protocol = 's', exclude_set = set()):
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if hostmap is None:
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hostmap = constants.net.DEFAULT_SERVERS
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eligible = list(set(filter_protocol(hostmap, protocol)) - exclude_set)
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return random.choice(eligible) if eligible else None
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from .simple_config import SimpleConfig
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proxy_modes = ['socks4', 'socks5']
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def serialize_proxy(p):
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if not isinstance(p, dict):
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return None
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return ':'.join([p.get('mode'), p.get('host'), p.get('port'),
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p.get('user', ''), p.get('password', '')])
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def deserialize_proxy(s):
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if not isinstance(s, str):
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return None
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if s.lower() == 'none':
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return None
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proxy = { "mode":"socks5", "host":"localhost" }
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# FIXME raw IPv6 address fails here
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args = s.split(':')
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n = 0
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if proxy_modes.count(args[n]) == 1:
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proxy["mode"] = args[n]
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n += 1
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if len(args) > n:
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proxy["host"] = args[n]
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n += 1
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if len(args) > n:
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proxy["port"] = args[n]
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n += 1
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else:
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proxy["port"] = "8080" if proxy["mode"] == "http" else "1080"
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if len(args) > n:
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proxy["user"] = args[n]
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n += 1
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if len(args) > n:
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proxy["password"] = args[n]
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return proxy
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INSTANCE = None
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class Network(PrintError):
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"""The Network class manages a set of connections to remote electrum
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servers, each connected socket is handled by an Interface() object.
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Connections are initiated by a Connection() thread which stops once
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the connection succeeds or fails.
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Our external API:
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- Member functions get_header(), get_interfaces(), get_local_height(),
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get_parameters(), get_server_height(), get_status_value(),
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is_connected(), set_parameters(), stop()
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"""
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verbosity_filter = 'n'
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def __init__(self, config=None):
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global INSTANCE
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INSTANCE = self
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if config is None:
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config = {} # Do not use mutables as default values!
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self.config = SimpleConfig(config) if isinstance(config, dict) else config
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self.num_server = 10 if not self.config.get('oneserver') else 0
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blockchain.blockchains = blockchain.read_blockchains(self.config) # note: needs self.blockchains_lock
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self.print_error("blockchains", list(blockchain.blockchains.keys()))
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self.blockchain_index = config.get('blockchain_index', 0)
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if self.blockchain_index not in blockchain.blockchains.keys():
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self.blockchain_index = 0
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# Server for addresses and transactions
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self.default_server = self.config.get('server', None)
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# Sanitize default server
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if self.default_server:
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try:
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deserialize_server(self.default_server)
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except:
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self.print_error('Warning: failed to parse server-string; falling back to random.')
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self.default_server = None
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if not self.default_server:
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self.default_server = pick_random_server()
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# locks: if you need to take multiple ones, acquire them in the order they are defined here!
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self.bhi_lock = asyncio.Lock()
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self.interface_lock = threading.RLock() # <- re-entrant
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self.callback_lock = threading.Lock()
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self.pending_sends_lock = threading.Lock()
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self.recent_servers_lock = threading.RLock() # <- re-entrant
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self.blockchains_lock = threading.Lock()
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self.pending_sends = []
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self.message_id = 0
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self.debug = False
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self.irc_servers = {} # returned by interface (list from irc)
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self.recent_servers = self.read_recent_servers() # note: needs self.recent_servers_lock
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self.banner = ''
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self.donation_address = ''
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self.relay_fee = None
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# callbacks passed with subscriptions
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self.subscriptions = defaultdict(list) # note: needs self.callback_lock
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self.sub_cache = {} # note: needs self.interface_lock
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# callbacks set by the GUI
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self.callbacks = defaultdict(list) # note: needs self.callback_lock
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dir_path = os.path.join(self.config.path, 'certs')
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util.make_dir(dir_path)
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# subscriptions and requests
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self.h2addr = {}
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# Requests from client we've not seen a response to
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self.unanswered_requests = {}
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# retry times
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self.server_retry_time = time.time()
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self.nodes_retry_time = time.time()
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# kick off the network. interface is the main server we are currently
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# communicating with. interfaces is the set of servers we are connecting
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# to or have an ongoing connection with
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self.interface = None # note: needs self.interface_lock
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self.interfaces = {} # note: needs self.interface_lock
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self.auto_connect = self.config.get('auto_connect', True)
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self.connecting = set()
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self.requested_chunks = set()
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self.socket_queue = queue.Queue()
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self.start_network(deserialize_server(self.default_server)[2],
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deserialize_proxy(self.config.get('proxy')))
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self.asyncio_loop = asyncio.get_event_loop()
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@staticmethod
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def get_instance():
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return INSTANCE
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def with_interface_lock(func):
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def func_wrapper(self, *args, **kwargs):
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with self.interface_lock:
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return func(self, *args, **kwargs)
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return func_wrapper
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def with_recent_servers_lock(func):
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def func_wrapper(self, *args, **kwargs):
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with self.recent_servers_lock:
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return func(self, *args, **kwargs)
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return func_wrapper
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def register_callback(self, callback, events):
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with self.callback_lock:
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for event in events:
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self.callbacks[event].append(callback)
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def unregister_callback(self, callback):
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with self.callback_lock:
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for callbacks in self.callbacks.values():
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if callback in callbacks:
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callbacks.remove(callback)
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def trigger_callback(self, event, *args):
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with self.callback_lock:
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callbacks = self.callbacks[event][:]
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for callback in callbacks:
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if asyncio.iscoroutinefunction(callback):
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asyncio.run_coroutine_threadsafe(callback(event, *args), self.asyncio_loop)
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else:
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callback(event, *args)
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def read_recent_servers(self):
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if not self.config.path:
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return []
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path = os.path.join(self.config.path, "recent_servers")
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try:
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with open(path, "r", encoding='utf-8') as f:
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data = f.read()
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return json.loads(data)
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except:
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return []
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@with_recent_servers_lock
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def save_recent_servers(self):
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if not self.config.path:
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return
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path = os.path.join(self.config.path, "recent_servers")
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s = json.dumps(self.recent_servers, indent=4, sort_keys=True)
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try:
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with open(path, "w", encoding='utf-8') as f:
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f.write(s)
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except:
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pass
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@with_interface_lock
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def get_server_height(self):
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return self.interface.tip if self.interface else 0
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def server_is_lagging(self):
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sh = self.get_server_height()
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if not sh:
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self.print_error('no height for main interface')
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return True
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lh = self.get_local_height()
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result = (lh - sh) > 1
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if result:
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self.print_error('%s is lagging (%d vs %d)' % (self.default_server, sh, lh))
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return result
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def set_status(self, status):
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self.connection_status = status
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self.notify('status')
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def is_connected(self):
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return self.interface is not None and self.interface.ready.done()
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def is_connecting(self):
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return self.connection_status == 'connecting'
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async def request_server_info(self, interface):
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await interface.ready
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session = interface.session
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self.banner = await session.send_request('server.banner')
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self.notify('banner')
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self.donation_address = await session.send_request('server.donation_address')
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self.irc_servers = parse_servers(await session.send_request('server.peers.subscribe'))
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self.notify('servers')
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await self.request_fee_estimates(interface)
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relayfee = await session.send_request('blockchain.relayfee')
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self.relay_fee = int(relayfee * COIN) if relayfee is not None else None
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async def request_fee_estimates(self, interface):
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session = interface.session
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from .simple_config import FEE_ETA_TARGETS
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self.config.requested_fee_estimates()
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async with TaskGroup() as group:
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histogram_task = await group.spawn(session.send_request('mempool.get_fee_histogram'))
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fee_tasks = []
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for i in FEE_ETA_TARGETS:
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fee_tasks.append((i, await group.spawn(session.send_request('blockchain.estimatefee', [i]))))
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self.config.mempool_fees = histogram_task.result()
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self.notify('fee_histogram')
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for i, task in fee_tasks:
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fee = int(task.result() * COIN)
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self.config.update_fee_estimates(i, fee)
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self.print_error("fee_estimates[%d]" % i, fee)
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self.notify('fee')
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def get_status_value(self, key):
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if key == 'status':
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value = self.connection_status
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elif key == 'banner':
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value = self.banner
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elif key == 'fee':
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value = self.config.fee_estimates
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elif key == 'fee_histogram':
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value = self.config.mempool_fees
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elif key == 'updated':
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value = (self.get_local_height(), self.get_server_height())
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elif key == 'servers':
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value = self.get_servers()
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elif key == 'interfaces':
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value = self.get_interfaces()
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return value
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def notify(self, key):
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if key in ['status', 'updated']:
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self.trigger_callback(key)
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else:
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self.trigger_callback(key, self.get_status_value(key))
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def get_parameters(self):
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host, port, protocol = deserialize_server(self.default_server)
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return host, port, protocol, self.proxy, self.auto_connect
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def get_donation_address(self):
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if self.is_connected():
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return self.donation_address
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@with_interface_lock
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def get_interfaces(self):
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'''The interfaces that are in connected state'''
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return list(self.interfaces.keys())
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@with_recent_servers_lock
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def get_servers(self):
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out = constants.net.DEFAULT_SERVERS
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if self.irc_servers:
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out.update(filter_version(self.irc_servers.copy()))
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else:
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for s in self.recent_servers:
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try:
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host, port, protocol = deserialize_server(s)
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except:
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continue
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if host not in out:
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out[host] = {protocol: port}
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if self.config.get('noonion'):
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out = filter_noonion(out)
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return out
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@with_interface_lock
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def start_interface(self, server):
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if (not server in self.interfaces and not server in self.connecting):
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if server == self.default_server:
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self.print_error("connecting to %s as new interface" % server)
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self.set_status('connecting')
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self.connecting.add(server)
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self.socket_queue.put(server)
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def start_random_interface(self):
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with self.interface_lock:
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exclude_set = self.disconnected_servers.union(set(self.interfaces))
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server = pick_random_server(self.get_servers(), self.protocol, exclude_set)
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if server:
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self.start_interface(server)
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return server
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def set_proxy(self, proxy):
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self.proxy = proxy
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# Store these somewhere so we can un-monkey-patch
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if not hasattr(socket, "_socketobject"):
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socket._getaddrinfo = socket.getaddrinfo
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if proxy:
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self.print_error('setting proxy', proxy)
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proxy_mode = proxy_modes.index(proxy["mode"]) + 1
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# prevent dns leaks, see http://stackoverflow.com/questions/13184205/dns-over-proxy
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socket.getaddrinfo = lambda *args: [(socket.AF_INET, socket.SOCK_STREAM, 6, '', (args[0], args[1]))]
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else:
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if sys.platform == 'win32':
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# On Windows, socket.getaddrinfo takes a mutex, and might hold it for up to 10 seconds
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# when dns-resolving. To speed it up drastically, we resolve dns ourselves, outside that lock.
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# see #4421
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socket.getaddrinfo = self._fast_getaddrinfo
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else:
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socket.getaddrinfo = socket._getaddrinfo
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self.trigger_callback('proxy_set', self.proxy)
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@staticmethod
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def _fast_getaddrinfo(host, *args, **kwargs):
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def needs_dns_resolving(host2):
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try:
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ipaddress.ip_address(host2)
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return False # already valid IP
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except ValueError:
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pass # not an IP
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if str(host) in ('localhost', 'localhost.',):
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return False
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return True
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try:
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if needs_dns_resolving(host):
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answers = dns.resolver.query(host)
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addr = str(answers[0])
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else:
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addr = host
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except dns.exception.DNSException:
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# dns failed for some reason, e.g. dns.resolver.NXDOMAIN
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# this is normal. Simply report back failure:
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raise socket.gaierror(11001, 'getaddrinfo failed')
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except BaseException as e:
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# Possibly internal error in dnspython :( see #4483
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# Fall back to original socket.getaddrinfo to resolve dns.
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print_error('dnspython failed to resolve dns with error:', e)
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addr = host
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return socket._getaddrinfo(addr, *args, **kwargs)
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@with_interface_lock
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def start_network(self, protocol, proxy):
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assert not self.interface and not self.interfaces
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assert not self.connecting and self.socket_queue.empty()
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self.print_error('starting network')
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self.disconnected_servers = set([]) # note: needs self.interface_lock
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self.protocol = protocol
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self.set_proxy(proxy)
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self.start_interface(self.default_server)
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@with_interface_lock
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def stop_network(self):
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self.print_error("stopping network")
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for interface in list(self.interfaces.values()):
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self.close_interface(interface)
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if self.interface:
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self.close_interface(self.interface)
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assert self.interface is None
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assert not self.interfaces
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self.connecting.clear()
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# Get a new queue - no old pending connections thanks!
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self.socket_queue = queue.Queue()
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def set_parameters(self, host, port, protocol, proxy, auto_connect):
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proxy_str = serialize_proxy(proxy)
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server = serialize_server(host, port, protocol)
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# sanitize parameters
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try:
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deserialize_server(serialize_server(host, port, protocol))
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if proxy:
|
|
proxy_modes.index(proxy["mode"]) + 1
|
|
int(proxy['port'])
|
|
except:
|
|
return
|
|
self.config.set_key('auto_connect', auto_connect, False)
|
|
self.config.set_key("proxy", proxy_str, False)
|
|
self.config.set_key("server", server, True)
|
|
# abort if changes were not allowed by config
|
|
if self.config.get('server') != server or self.config.get('proxy') != proxy_str:
|
|
return
|
|
self.auto_connect = auto_connect
|
|
if self.proxy != proxy or self.protocol != protocol:
|
|
# Restart the network defaulting to the given server
|
|
with self.interface_lock:
|
|
self.stop_network()
|
|
self.default_server = server
|
|
self.start_network(protocol, proxy)
|
|
elif self.default_server != server:
|
|
self.switch_to_interface(server)
|
|
else:
|
|
self.switch_lagging_interface()
|
|
self.notify('updated')
|
|
|
|
def switch_to_random_interface(self):
|
|
'''Switch to a random connected server other than the current one'''
|
|
servers = self.get_interfaces() # Those in connected state
|
|
if self.default_server in servers:
|
|
servers.remove(self.default_server)
|
|
if servers:
|
|
self.switch_to_interface(random.choice(servers))
|
|
|
|
@with_interface_lock
|
|
def switch_lagging_interface(self):
|
|
'''If auto_connect and lagging, switch interface'''
|
|
if self.server_is_lagging() and self.auto_connect:
|
|
# switch to one that has the correct header (not height)
|
|
header = self.blockchain().read_header(self.get_local_height())
|
|
def filt(x):
|
|
a = x[1].tip_header
|
|
b = header
|
|
assert type(a) is type(b)
|
|
return a == b
|
|
filtered = list(map(lambda x: x[0], filter(filt, self.interfaces.items())))
|
|
if filtered:
|
|
choice = random.choice(filtered)
|
|
self.switch_to_interface(choice)
|
|
|
|
@with_interface_lock
|
|
def switch_to_interface(self, server):
|
|
'''Switch to server as our interface. If no connection exists nor
|
|
being opened, start a thread to connect. The actual switch will
|
|
happen on receipt of the connection notification. Do nothing
|
|
if server already is our interface.'''
|
|
self.default_server = server
|
|
if server not in self.interfaces:
|
|
self.interface = None
|
|
self.start_interface(server)
|
|
return
|
|
|
|
i = self.interfaces[server]
|
|
if self.interface != i:
|
|
self.print_error("switching to", server)
|
|
if self.interface is not None:
|
|
# Stop any current interface in order to terminate subscriptions,
|
|
# and to cancel tasks in interface.group.
|
|
# However, for headers sub, give preference to this interface
|
|
# over unknown ones, i.e. start it again right away.
|
|
self.close_interface(self.interface)
|
|
if len(self.interfaces) <= self.num_server:
|
|
self.start_interface(self.interface.server)
|
|
|
|
self.interface = i
|
|
asyncio.get_event_loop().create_task(
|
|
i.group.spawn(self.request_server_info(i)))
|
|
self.trigger_callback('default_server_changed')
|
|
self.set_status('connected')
|
|
self.notify('updated')
|
|
self.notify('interfaces')
|
|
|
|
@with_interface_lock
|
|
def close_interface(self, interface):
|
|
if interface:
|
|
if interface.server in self.interfaces:
|
|
self.interfaces.pop(interface.server)
|
|
if interface.server == self.default_server:
|
|
self.interface = None
|
|
interface.close()
|
|
|
|
@with_recent_servers_lock
|
|
def add_recent_server(self, server):
|
|
# list is ordered
|
|
if server in self.recent_servers:
|
|
self.recent_servers.remove(server)
|
|
self.recent_servers.insert(0, server)
|
|
self.recent_servers = self.recent_servers[0:20]
|
|
self.save_recent_servers()
|
|
|
|
def process_response(self, interface, response, callbacks):
|
|
if self.debug:
|
|
self.print_error(interface.host, "<--", response)
|
|
error = response.get('error')
|
|
result = response.get('result')
|
|
method = response.get('method')
|
|
params = response.get('params')
|
|
|
|
# We handle some responses; return the rest to the client.
|
|
if method == 'server.version':
|
|
interface.server_version = result
|
|
elif method == 'blockchain.headers.subscribe':
|
|
if error is None:
|
|
self.on_notify_header(interface, result)
|
|
else:
|
|
# no point in keeping this connection without headers sub
|
|
self.connection_down(interface.server)
|
|
return
|
|
elif method == 'server.peers.subscribe':
|
|
if error is None:
|
|
self.irc_servers = parse_servers(result)
|
|
self.notify('servers')
|
|
elif method == 'server.banner':
|
|
if error is None:
|
|
self.banner = result
|
|
self.notify('banner')
|
|
elif method == 'server.donation_address':
|
|
if error is None:
|
|
self.donation_address = result
|
|
elif method == 'mempool.get_fee_histogram':
|
|
if error is None:
|
|
self.print_error('fee_histogram', result)
|
|
self.config.mempool_fees = result
|
|
self.notify('fee_histogram')
|
|
elif method == 'blockchain.estimatefee':
|
|
if error is None and result > 0:
|
|
i = params[0]
|
|
fee = int(result*COIN)
|
|
self.config.update_fee_estimates(i, fee)
|
|
self.print_error("fee_estimates[%d]" % i, fee)
|
|
self.notify('fee')
|
|
elif method == 'blockchain.relayfee':
|
|
if error is None:
|
|
self.relay_fee = int(result * COIN) if result is not None else None
|
|
self.print_error("relayfee", self.relay_fee)
|
|
elif method == 'blockchain.block.headers':
|
|
self.on_block_headers(interface, response)
|
|
elif method == 'blockchain.block.get_header':
|
|
self.on_get_header(interface, response)
|
|
|
|
for callback in callbacks:
|
|
callback(response)
|
|
|
|
@classmethod
|
|
def get_index(cls, method, params):
|
|
""" hashable index for subscriptions and cache"""
|
|
return str(method) + (':' + str(params[0]) if params else '')
|
|
|
|
def unsubscribe(self, callback):
|
|
'''Unsubscribe a callback to free object references to enable GC.'''
|
|
# Note: we can't unsubscribe from the server, so if we receive
|
|
# subsequent notifications process_response() will emit a harmless
|
|
# "received unexpected notification" warning
|
|
with self.callback_lock:
|
|
for v in self.subscriptions.values():
|
|
if callback in v:
|
|
v.remove(callback)
|
|
|
|
@with_interface_lock
|
|
def connection_down(self, server):
|
|
'''A connection to server either went down, or was never made.
|
|
We distinguish by whether it is in self.interfaces.'''
|
|
self.disconnected_servers.add(server)
|
|
if server == self.default_server:
|
|
self.set_status('disconnected')
|
|
if server in self.interfaces:
|
|
self.close_interface(self.interfaces[server])
|
|
self.notify('interfaces')
|
|
with self.blockchains_lock:
|
|
for b in blockchain.blockchains.values():
|
|
if b.catch_up == server:
|
|
b.catch_up = None
|
|
|
|
@aiosafe
|
|
async def new_interface(self, server):
|
|
# todo: get tip first, then decide which checkpoint to use.
|
|
self.add_recent_server(server)
|
|
|
|
interface = Interface(self, server, self.config.path, self.proxy)
|
|
try:
|
|
await asyncio.wait_for(interface.ready, 5)
|
|
except BaseException as e:
|
|
#import traceback
|
|
#traceback.print_exc()
|
|
self.print_error(interface.server, "couldn't launch because", str(e), str(type(e)))
|
|
self.connection_down(interface.server)
|
|
return
|
|
finally:
|
|
try: self.connecting.remove(server)
|
|
except KeyError: pass
|
|
|
|
with self.interface_lock:
|
|
self.interfaces[server] = interface
|
|
|
|
if server == self.default_server:
|
|
self.switch_to_interface(server)
|
|
|
|
#self.notify('interfaces')
|
|
|
|
def init_headers_file(self):
|
|
b = blockchain.blockchains[0]
|
|
filename = b.path()
|
|
length = 80 * len(constants.net.CHECKPOINTS) * 2016
|
|
if not os.path.exists(filename) or os.path.getsize(filename) < length:
|
|
with open(filename, 'wb') as f:
|
|
if length>0:
|
|
f.seek(length-1)
|
|
f.write(b'\x00')
|
|
with b.lock:
|
|
b.update_size()
|
|
|
|
async def get_merkle_for_transaction(self, tx_hash, tx_height):
|
|
return await self.interface.session.send_request('blockchain.transaction.get_merkle', [tx_hash, tx_height])
|
|
|
|
def broadcast_transaction(self, tx, timeout=5):
|
|
fut = asyncio.run_coroutine_threadsafe(self.interface.session.send_request('blockchain.transaction.broadcast', [str(tx)]), self.asyncio_loop)
|
|
try:
|
|
out = fut.result(timeout)
|
|
except asyncio.TimeoutError as e:
|
|
return False, "error: operation timed out"
|
|
except Exception as e:
|
|
return False, "error: " + str(e)
|
|
|
|
if out != tx.txid():
|
|
return False, "error: " + out
|
|
return True, out
|
|
|
|
async def request_chunk(self, height, tip, session=None, can_return_early=False):
|
|
if session is None: session = self.interface.session
|
|
index = height // 2016
|
|
if can_return_early and index in self.requested_chunks:
|
|
return
|
|
size = 2016
|
|
if tip is not None:
|
|
size = min(size, tip - index * 2016)
|
|
size = max(size, 0)
|
|
try:
|
|
self.requested_chunks.add(index)
|
|
res = await asyncio.wait_for(session.send_request('blockchain.block.headers', [index * 2016, size]), 20)
|
|
finally:
|
|
try: self.requested_chunks.remove(index)
|
|
except KeyError: pass
|
|
conn = self.blockchain().connect_chunk(index, res['hex'])
|
|
if not conn:
|
|
return conn, 0
|
|
return conn, res['count']
|
|
|
|
@with_interface_lock
|
|
def blockchain(self):
|
|
if self.interface and self.interface.blockchain is not None:
|
|
self.blockchain_index = self.interface.blockchain.forkpoint
|
|
return blockchain.blockchains[self.blockchain_index]
|
|
|
|
@with_interface_lock
|
|
def get_blockchains(self):
|
|
out = {}
|
|
with self.blockchains_lock:
|
|
blockchain_items = list(blockchain.blockchains.items())
|
|
for k, b in blockchain_items:
|
|
r = list(filter(lambda i: i.blockchain==b, list(self.interfaces.values())))
|
|
if r:
|
|
out[k] = r
|
|
return out
|
|
|
|
def follow_chain(self, index):
|
|
bc = blockchain.blockchains.get(index)
|
|
if bc:
|
|
self.blockchain_index = index
|
|
self.config.set_key('blockchain_index', index)
|
|
with self.interface_lock:
|
|
interfaces = list(self.interfaces.values())
|
|
for i in interfaces:
|
|
if i.blockchain == bc:
|
|
self.switch_to_interface(i.server)
|
|
break
|
|
else:
|
|
raise Exception('blockchain not found', index)
|
|
|
|
with self.interface_lock:
|
|
if self.interface:
|
|
server = self.interface.server
|
|
host, port, protocol, proxy, auto_connect = self.get_parameters()
|
|
host, port, protocol = deserialize_server(server)
|
|
self.set_parameters(host, port, protocol, proxy, auto_connect)
|
|
|
|
def get_local_height(self):
|
|
return self.blockchain().height()
|
|
|
|
def export_checkpoints(self, path):
|
|
# run manually from the console to generate checkpoints
|
|
cp = self.blockchain().get_checkpoints()
|
|
with open(path, 'w', encoding='utf-8') as f:
|
|
f.write(json.dumps(cp, indent=4))
|
|
|
|
def start(self, fx=None):
|
|
self.main_taskgroup = TaskGroup()
|
|
async def main():
|
|
self.init_headers_file()
|
|
async with self.main_taskgroup as group:
|
|
await group.spawn(self.maintain_sessions())
|
|
if fx: await group.spawn(fx)
|
|
self._wrapper_thread = threading.Thread(target=self.asyncio_loop.run_until_complete, args=(main(),))
|
|
self._wrapper_thread.start()
|
|
|
|
def stop(self):
|
|
asyncio.run_coroutine_threadsafe(self.main_taskgroup.cancel_remaining(), self.asyncio_loop)
|
|
|
|
def join(self):
|
|
self._wrapper_thread.join(1)
|
|
|
|
async def maintain_sessions(self):
|
|
while True:
|
|
while self.socket_queue.qsize() > 0:
|
|
server = self.socket_queue.get()
|
|
asyncio.get_event_loop().create_task(self.new_interface(server))
|
|
remove = []
|
|
for k, i in self.interfaces.items():
|
|
if i.fut.done() and not i.exception:
|
|
assert False, "interface future should not finish without exception"
|
|
if i.exception:
|
|
if not i.fut.done():
|
|
try: i.fut.cancel()
|
|
except Exception as e: self.print_error('exception while cancelling fut', e)
|
|
try:
|
|
raise i.exception
|
|
except BaseException as e:
|
|
self.print_error(i.server, "errored because:", str(e), str(type(e)))
|
|
remove.append(k)
|
|
for k in remove:
|
|
self.connection_down(k)
|
|
|
|
# nodes
|
|
now = time.time()
|
|
for i in range(self.num_server - len(self.interfaces) - len(self.connecting)):
|
|
self.start_random_interface()
|
|
if now - self.nodes_retry_time > NODES_RETRY_INTERVAL:
|
|
self.print_error('network: retrying connections')
|
|
self.disconnected_servers = set([])
|
|
self.nodes_retry_time = now
|
|
|
|
# main interface
|
|
if not self.is_connected():
|
|
if self.auto_connect:
|
|
if not self.is_connecting():
|
|
self.switch_to_random_interface()
|
|
else:
|
|
if self.default_server in self.disconnected_servers:
|
|
if now - self.server_retry_time > SERVER_RETRY_INTERVAL:
|
|
self.disconnected_servers.remove(self.default_server)
|
|
self.server_retry_time = now
|
|
else:
|
|
self.switch_to_interface(self.default_server)
|
|
else:
|
|
if self.config.is_fee_estimates_update_required():
|
|
await self.interface.group.spawn(self.attempt_fee_estimate_update())
|
|
|
|
await asyncio.sleep(0.1)
|
|
|
|
async def attempt_fee_estimate_update(self):
|
|
await asyncio.wait_for(self.request_fee_estimates(self.interface), 5)
|