ThomasV
7 years ago
3 changed files with 596 additions and 538 deletions
@ -0,0 +1,589 @@
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# -*- coding: utf-8 -*- |
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# |
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# Electrum - lightweight Bitcoin client |
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# Copyright (C) 2018 The Electrum developers |
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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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from datetime import datetime |
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import time |
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import random |
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import queue |
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import os |
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import json |
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import threading |
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import concurrent |
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from collections import defaultdict |
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from typing import Sequence, List, Tuple, Optional, Dict, NamedTuple, TYPE_CHECKING, Set |
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import binascii |
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import base64 |
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from sqlalchemy import Column, ForeignKey, Integer, String, Boolean |
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from sqlalchemy.orm.query import Query |
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from sqlalchemy.ext.declarative import declarative_base |
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from sqlalchemy.sql import not_, or_ |
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from .sql_db import SqlDB, sql |
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from . import constants |
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from .util import bh2u, profiler, get_headers_dir, bfh, is_ip_address, list_enabled_bits, print_msg, chunks |
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from .logging import Logger |
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from .storage import JsonDB |
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from .lnverifier import LNChannelVerifier, verify_sig_for_channel_update |
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from .crypto import sha256d |
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from . import ecc |
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from .lnutil import (LN_GLOBAL_FEATURES_KNOWN_SET, LNPeerAddr, NUM_MAX_EDGES_IN_PAYMENT_PATH, |
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NotFoundChanAnnouncementForUpdate) |
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from .lnmsg import encode_msg |
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if TYPE_CHECKING: |
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from .lnchannel import Channel |
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from .network import Network |
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class UnknownEvenFeatureBits(Exception): pass |
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def validate_features(features : int): |
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enabled_features = list_enabled_bits(features) |
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for fbit in enabled_features: |
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if (1 << fbit) not in LN_GLOBAL_FEATURES_KNOWN_SET and fbit % 2 == 0: |
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raise UnknownEvenFeatureBits() |
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Base = declarative_base() |
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FLAG_DISABLE = 1 << 1 |
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FLAG_DIRECTION = 1 << 0 |
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class ChannelInfo(Base): |
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__tablename__ = 'channel_info' |
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short_channel_id = Column(String(64), primary_key=True) |
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node1_id = Column(String(66), ForeignKey('node_info.node_id'), nullable=False) |
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node2_id = Column(String(66), ForeignKey('node_info.node_id'), nullable=False) |
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capacity_sat = Column(Integer) |
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msg_payload_hex = Column(String(1024), nullable=False) |
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trusted = Column(Boolean, nullable=False) |
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@staticmethod |
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def from_msg(payload): |
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features = int.from_bytes(payload['features'], 'big') |
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validate_features(features) |
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channel_id = payload['short_channel_id'].hex() |
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node_id_1 = payload['node_id_1'].hex() |
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node_id_2 = payload['node_id_2'].hex() |
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assert list(sorted([node_id_1, node_id_2])) == [node_id_1, node_id_2] |
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msg_payload_hex = encode_msg('channel_announcement', **payload).hex() |
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capacity_sat = None |
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return ChannelInfo(short_channel_id = channel_id, node1_id = node_id_1, |
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node2_id = node_id_2, capacity_sat = capacity_sat, msg_payload_hex = msg_payload_hex, |
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trusted = False) |
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@property |
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def msg_payload(self): |
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return bytes.fromhex(self.msg_payload_hex) |
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class Policy(Base): |
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__tablename__ = 'policy' |
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start_node = Column(String(66), ForeignKey('node_info.node_id'), primary_key=True) |
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short_channel_id = Column(String(64), ForeignKey('channel_info.short_channel_id'), primary_key=True) |
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cltv_expiry_delta = Column(Integer, nullable=False) |
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htlc_minimum_msat = Column(Integer, nullable=False) |
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htlc_maximum_msat = Column(Integer) |
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fee_base_msat = Column(Integer, nullable=False) |
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fee_proportional_millionths = Column(Integer, nullable=False) |
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channel_flags = Column(Integer, nullable=False) |
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timestamp = Column(Integer, nullable=False) |
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@staticmethod |
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def from_msg(payload): |
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cltv_expiry_delta = int.from_bytes(payload['cltv_expiry_delta'], "big") |
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htlc_minimum_msat = int.from_bytes(payload['htlc_minimum_msat'], "big") |
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htlc_maximum_msat = int.from_bytes(payload['htlc_maximum_msat'], "big") if 'htlc_maximum_msat' in payload else None |
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fee_base_msat = int.from_bytes(payload['fee_base_msat'], "big") |
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fee_proportional_millionths = int.from_bytes(payload['fee_proportional_millionths'], "big") |
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channel_flags = int.from_bytes(payload['channel_flags'], "big") |
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timestamp = int.from_bytes(payload['timestamp'], "big") |
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start_node = payload['start_node'].hex() |
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short_channel_id = payload['short_channel_id'].hex() |
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return Policy(start_node=start_node, |
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short_channel_id=short_channel_id, |
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cltv_expiry_delta=cltv_expiry_delta, |
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htlc_minimum_msat=htlc_minimum_msat, |
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fee_base_msat=fee_base_msat, |
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fee_proportional_millionths=fee_proportional_millionths, |
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channel_flags=channel_flags, |
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timestamp=timestamp, |
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htlc_maximum_msat=htlc_maximum_msat) |
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def is_disabled(self): |
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return self.channel_flags & FLAG_DISABLE |
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class NodeInfo(Base): |
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__tablename__ = 'node_info' |
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node_id = Column(String(66), primary_key=True, sqlite_on_conflict_primary_key='REPLACE') |
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features = Column(Integer, nullable=False) |
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timestamp = Column(Integer, nullable=False) |
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alias = Column(String(64), nullable=False) |
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@staticmethod |
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def from_msg(payload): |
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node_id = payload['node_id'].hex() |
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features = int.from_bytes(payload['features'], "big") |
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validate_features(features) |
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addresses = NodeInfo.parse_addresses_field(payload['addresses']) |
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alias = payload['alias'].rstrip(b'\x00').hex() |
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timestamp = int.from_bytes(payload['timestamp'], "big") |
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return NodeInfo(node_id=node_id, features=features, timestamp=timestamp, alias=alias), [ |
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Address(host=host, port=port, node_id=node_id, last_connected_date=None) for host, port in addresses] |
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@staticmethod |
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def parse_addresses_field(addresses_field): |
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buf = addresses_field |
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def read(n): |
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nonlocal buf |
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data, buf = buf[0:n], buf[n:] |
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return data |
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addresses = [] |
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while buf: |
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atype = ord(read(1)) |
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if atype == 0: |
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pass |
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elif atype == 1: # IPv4 |
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ipv4_addr = '.'.join(map(lambda x: '%d' % x, read(4))) |
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port = int.from_bytes(read(2), 'big') |
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if is_ip_address(ipv4_addr) and port != 0: |
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addresses.append((ipv4_addr, port)) |
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elif atype == 2: # IPv6 |
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ipv6_addr = b':'.join([binascii.hexlify(read(2)) for i in range(8)]) |
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ipv6_addr = ipv6_addr.decode('ascii') |
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port = int.from_bytes(read(2), 'big') |
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if is_ip_address(ipv6_addr) and port != 0: |
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addresses.append((ipv6_addr, port)) |
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elif atype == 3: # onion v2 |
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host = base64.b32encode(read(10)) + b'.onion' |
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host = host.decode('ascii').lower() |
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port = int.from_bytes(read(2), 'big') |
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addresses.append((host, port)) |
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elif atype == 4: # onion v3 |
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host = base64.b32encode(read(35)) + b'.onion' |
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host = host.decode('ascii').lower() |
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port = int.from_bytes(read(2), 'big') |
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addresses.append((host, port)) |
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else: |
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# unknown address type |
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# we don't know how long it is -> have to escape |
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# if there are other addresses we could have parsed later, they are lost. |
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break |
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return addresses |
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class Address(Base): |
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__tablename__ = 'address' |
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node_id = Column(String(66), ForeignKey('node_info.node_id'), primary_key=True) |
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host = Column(String(256), primary_key=True) |
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port = Column(Integer, primary_key=True) |
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last_connected_date = Column(Integer(), nullable=True) |
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class ChannelDB(SqlDB): |
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NUM_MAX_RECENT_PEERS = 20 |
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def __init__(self, network: 'Network'): |
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path = os.path.join(get_headers_dir(network.config), 'channel_db') |
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super().__init__(network, path, Base) |
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self.num_nodes = 0 |
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self.num_channels = 0 |
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self._channel_updates_for_private_channels = {} # type: Dict[Tuple[bytes, bytes], dict] |
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self.ca_verifier = LNChannelVerifier(network, self) |
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self.update_counts() |
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@sql |
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def update_counts(self): |
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self._update_counts() |
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def _update_counts(self): |
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self.num_channels = self.DBSession.query(ChannelInfo).count() |
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self.num_policies = self.DBSession.query(Policy).count() |
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self.num_nodes = self.DBSession.query(NodeInfo).count() |
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@sql |
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def known_ids(self): |
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known = self.DBSession.query(ChannelInfo.short_channel_id).all() |
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return set(bfh(r.short_channel_id) for r in known) |
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@sql |
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def add_recent_peer(self, peer: LNPeerAddr): |
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now = int(time.time()) |
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node_id = peer.pubkey.hex() |
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addr = self.DBSession.query(Address).filter_by(node_id=node_id, host=peer.host, port=peer.port).one_or_none() |
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if addr: |
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addr.last_connected_date = now |
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else: |
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addr = Address(node_id=node_id, host=peer.host, port=peer.port, last_connected_date=now) |
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self.DBSession.add(addr) |
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self.DBSession.commit() |
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@sql |
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def get_200_randomly_sorted_nodes_not_in(self, node_ids_bytes): |
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unshuffled = self.DBSession \ |
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.query(NodeInfo) \ |
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.filter(not_(NodeInfo.node_id.in_(x.hex() for x in node_ids_bytes))) \ |
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.limit(200) \ |
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.all() |
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return random.sample(unshuffled, len(unshuffled)) |
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@sql |
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def nodes_get(self, node_id): |
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return self.DBSession \ |
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.query(NodeInfo) \ |
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.filter_by(node_id = node_id.hex()) \ |
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.one_or_none() |
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@sql |
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def get_last_good_address(self, node_id) -> Optional[LNPeerAddr]: |
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r = self.DBSession.query(Address).filter_by(node_id=node_id.hex()).order_by(Address.last_connected_date.desc()).all() |
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if not r: |
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return None |
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addr = r[0] |
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return LNPeerAddr(addr.host, addr.port, bytes.fromhex(addr.node_id)) |
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@sql |
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def get_recent_peers(self): |
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r = self.DBSession.query(Address).filter(Address.last_connected_date.isnot(None)).order_by(Address.last_connected_date.desc()).limit(self.NUM_MAX_RECENT_PEERS).all() |
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return [LNPeerAddr(x.host, x.port, bytes.fromhex(x.node_id)) for x in r] |
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@sql |
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def missing_channel_announcements(self) -> Set[int]: |
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expr = not_(Policy.short_channel_id.in_(self.DBSession.query(ChannelInfo.short_channel_id))) |
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return set(x[0] for x in self.DBSession.query(Policy.short_channel_id).filter(expr).all()) |
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@sql |
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def missing_channel_updates(self) -> Set[int]: |
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expr = not_(ChannelInfo.short_channel_id.in_(self.DBSession.query(Policy.short_channel_id))) |
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return set(x[0] for x in self.DBSession.query(ChannelInfo.short_channel_id).filter(expr).all()) |
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@sql |
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def add_verified_channel_info(self, short_id, capacity): |
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# called from lnchannelverifier |
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channel_info = self.DBSession.query(ChannelInfo).filter_by(short_channel_id = short_id.hex()).one_or_none() |
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channel_info.trusted = True |
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channel_info.capacity = capacity |
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self.DBSession.commit() |
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@sql |
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@profiler |
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def on_channel_announcement(self, msg_payloads, trusted=True): |
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if type(msg_payloads) is dict: |
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msg_payloads = [msg_payloads] |
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new_channels = {} |
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for msg in msg_payloads: |
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short_channel_id = bh2u(msg['short_channel_id']) |
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if self.DBSession.query(ChannelInfo).filter_by(short_channel_id=short_channel_id).count(): |
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continue |
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if constants.net.rev_genesis_bytes() != msg['chain_hash']: |
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self.logger.info("ChanAnn has unexpected chain_hash {}".format(bh2u(msg['chain_hash']))) |
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continue |
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try: |
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channel_info = ChannelInfo.from_msg(msg) |
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except UnknownEvenFeatureBits: |
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self.logger.info("unknown feature bits") |
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continue |
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channel_info.trusted = trusted |
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new_channels[short_channel_id] = channel_info |
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if not trusted: |
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self.ca_verifier.add_new_channel_info(channel_info.short_channel_id, channel_info.msg_payload) |
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for channel_info in new_channels.values(): |
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self.DBSession.add(channel_info) |
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self.DBSession.commit() |
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self._update_counts() |
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self.logger.debug('on_channel_announcement: %d/%d'%(len(new_channels), len(msg_payloads))) |
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@sql |
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def get_last_timestamp(self): |
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return self._get_last_timestamp() |
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def _get_last_timestamp(self): |
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from sqlalchemy.sql import func |
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r = self.DBSession.query(func.max(Policy.timestamp).label('max_timestamp')).one() |
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return r.max_timestamp or 0 |
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def print_change(self, old_policy, new_policy): |
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# print what changed between policies |
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if old_policy.cltv_expiry_delta != new_policy.cltv_expiry_delta: |
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self.logger.info(f'cltv_expiry_delta: {old_policy.cltv_expiry_delta} -> {new_policy.cltv_expiry_delta}') |
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if old_policy.htlc_minimum_msat != new_policy.htlc_minimum_msat: |
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self.logger.info(f'htlc_minimum_msat: {old_policy.htlc_minimum_msat} -> {new_policy.htlc_minimum_msat}') |
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if old_policy.htlc_maximum_msat != new_policy.htlc_maximum_msat: |
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self.logger.info(f'htlc_maximum_msat: {old_policy.htlc_maximum_msat} -> {new_policy.htlc_maximum_msat}') |
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if old_policy.fee_base_msat != new_policy.fee_base_msat: |
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self.logger.info(f'fee_base_msat: {old_policy.fee_base_msat} -> {new_policy.fee_base_msat}') |
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if old_policy.fee_proportional_millionths != new_policy.fee_proportional_millionths: |
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self.logger.info(f'fee_proportional_millionths: {old_policy.fee_proportional_millionths} -> {new_policy.fee_proportional_millionths}') |
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if old_policy.channel_flags != new_policy.channel_flags: |
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self.logger.info(f'channel_flags: {old_policy.channel_flags} -> {new_policy.channel_flags}') |
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@sql |
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def get_info_for_updates(self, payloads): |
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short_channel_ids = [payload['short_channel_id'].hex() for payload in payloads] |
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channel_infos_list = self.DBSession.query(ChannelInfo).filter(ChannelInfo.short_channel_id.in_(short_channel_ids)).all() |
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channel_infos = {bfh(x.short_channel_id): x for x in channel_infos_list} |
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return channel_infos |
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@sql |
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def get_policies_for_updates(self, payloads): |
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out = {} |
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for payload in payloads: |
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short_channel_id = payload['short_channel_id'].hex() |
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start_node = payload['start_node'].hex() |
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policy = self.DBSession.query(Policy).filter_by(short_channel_id=short_channel_id, start_node=start_node).one_or_none() |
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if policy: |
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out[short_channel_id+start_node] = policy |
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return out |
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@profiler |
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def filter_channel_updates(self, payloads, max_age=None): |
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orphaned = [] # no channel announcement for channel update |
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expired = [] # update older than two weeks |
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deprecated = [] # update older than database entry |
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good = {} # good updates |
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to_delete = [] # database entries to delete |
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# filter orphaned and expired first |
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known = [] |
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now = int(time.time()) |
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channel_infos = self.get_info_for_updates(payloads) |
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for payload in payloads: |
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short_channel_id = payload['short_channel_id'] |
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timestamp = int.from_bytes(payload['timestamp'], "big") |
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if max_age and now - timestamp > max_age: |
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expired.append(short_channel_id) |
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continue |
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channel_info = channel_infos.get(short_channel_id) |
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if not channel_info: |
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orphaned.append(short_channel_id) |
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continue |
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flags = int.from_bytes(payload['channel_flags'], 'big') |
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direction = flags & FLAG_DIRECTION |
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start_node = channel_info.node1_id if direction == 0 else channel_info.node2_id |
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payload['start_node'] = bfh(start_node) |
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known.append(payload) |
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# compare updates to existing database entries |
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old_policies = self.get_policies_for_updates(known) |
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for payload in known: |
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timestamp = int.from_bytes(payload['timestamp'], "big") |
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start_node = payload['start_node'] |
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short_channel_id = payload['short_channel_id'] |
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key = (short_channel_id+start_node).hex() |
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old_policy = old_policies.get(key) |
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if old_policy: |
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if timestamp <= old_policy.timestamp: |
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deprecated.append(short_channel_id) |
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else: |
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good[key] = payload |
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to_delete.append(old_policy) |
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else: |
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good[key] = payload |
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good = list(good.values()) |
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return orphaned, expired, deprecated, good, to_delete |
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def add_channel_update(self, payload): |
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orphaned, expired, deprecated, good, to_delete = self.filter_channel_updates([payload]) |
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assert len(good) == 1 |
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self.update_policies(good, to_delete) |
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@sql |
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@profiler |
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def update_policies(self, to_add, to_delete): |
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for policy in to_delete: |
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self.DBSession.delete(policy) |
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self.DBSession.commit() |
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for payload in to_add: |
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policy = Policy.from_msg(payload) |
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self.DBSession.add(policy) |
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self.DBSession.commit() |
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self._update_counts() |
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@sql |
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@profiler |
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def on_node_announcement(self, msg_payloads): |
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if type(msg_payloads) is dict: |
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msg_payloads = [msg_payloads] |
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old_addr = None |
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new_nodes = {} |
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new_addresses = {} |
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for msg_payload in msg_payloads: |
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try: |
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node_info, node_addresses = NodeInfo.from_msg(msg_payload) |
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except UnknownEvenFeatureBits: |
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continue |
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node_id = node_info.node_id |
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# Ignore node if it has no associated channel (DoS protection) |
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# FIXME this is slow |
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expr = or_(ChannelInfo.node1_id==node_id, ChannelInfo.node2_id==node_id) |
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if len(self.DBSession.query(ChannelInfo.short_channel_id).filter(expr).limit(1).all()) == 0: |
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#self.logger.info('ignoring orphan node_announcement') |
||||
continue |
||||
node = self.DBSession.query(NodeInfo).filter_by(node_id=node_id).one_or_none() |
||||
if node and node.timestamp >= node_info.timestamp: |
||||
continue |
||||
node = new_nodes.get(node_id) |
||||
if node and node.timestamp >= node_info.timestamp: |
||||
continue |
||||
new_nodes[node_id] = node_info |
||||
for addr in node_addresses: |
||||
new_addresses[(addr.node_id,addr.host,addr.port)] = addr |
||||
self.logger.debug("on_node_announcement: %d/%d"%(len(new_nodes), len(msg_payloads))) |
||||
for node_info in new_nodes.values(): |
||||
self.DBSession.add(node_info) |
||||
for new_addr in new_addresses.values(): |
||||
old_addr = self.DBSession.query(Address).filter_by(node_id=new_addr.node_id, host=new_addr.host, port=new_addr.port).one_or_none() |
||||
if not old_addr: |
||||
self.DBSession.add(new_addr) |
||||
self.DBSession.commit() |
||||
self._update_counts() |
||||
|
||||
def get_routing_policy_for_channel(self, start_node_id: bytes, |
||||
short_channel_id: bytes) -> Optional[bytes]: |
||||
if not start_node_id or not short_channel_id: return None |
||||
channel_info = self.get_channel_info(short_channel_id) |
||||
if channel_info is not None: |
||||
return self.get_policy_for_node(short_channel_id, start_node_id) |
||||
msg = self._channel_updates_for_private_channels.get((start_node_id, short_channel_id)) |
||||
if not msg: |
||||
return None |
||||
return Policy.from_msg(msg) # won't actually be written to DB |
||||
|
||||
@sql |
||||
@profiler |
||||
def get_old_policies(self, delta): |
||||
timestamp = int(time.time()) - delta |
||||
old_policies = self.DBSession.query(Policy.short_channel_id).filter(Policy.timestamp <= timestamp) |
||||
return old_policies.distinct().count() |
||||
|
||||
@sql |
||||
@profiler |
||||
def prune_old_policies(self, delta): |
||||
# note: delete queries are order sensitive |
||||
timestamp = int(time.time()) - delta |
||||
old_policies = self.DBSession.query(Policy.short_channel_id).filter(Policy.timestamp <= timestamp) |
||||
delete_old_channels = ChannelInfo.__table__.delete().where(ChannelInfo.short_channel_id.in_(old_policies)) |
||||
delete_old_policies = Policy.__table__.delete().where(Policy.timestamp <= timestamp) |
||||
self.DBSession.execute(delete_old_channels) |
||||
self.DBSession.execute(delete_old_policies) |
||||
self.DBSession.commit() |
||||
self._update_counts() |
||||
|
||||
@sql |
||||
@profiler |
||||
def get_orphaned_channels(self): |
||||
subquery = self.DBSession.query(Policy.short_channel_id) |
||||
orphaned = self.DBSession.query(ChannelInfo).filter(not_(ChannelInfo.short_channel_id.in_(subquery))) |
||||
return orphaned.count() |
||||
|
||||
@sql |
||||
@profiler |
||||
def prune_orphaned_channels(self): |
||||
subquery = self.DBSession.query(Policy.short_channel_id) |
||||
delete_orphaned = ChannelInfo.__table__.delete().where(not_(ChannelInfo.short_channel_id.in_(subquery))) |
||||
self.DBSession.execute(delete_orphaned) |
||||
self.DBSession.commit() |
||||
self._update_counts() |
||||
|
||||
def add_channel_update_for_private_channel(self, msg_payload: dict, start_node_id: bytes): |
||||
if not verify_sig_for_channel_update(msg_payload, start_node_id): |
||||
return # ignore |
||||
short_channel_id = msg_payload['short_channel_id'] |
||||
msg_payload['start_node'] = start_node_id |
||||
self._channel_updates_for_private_channels[(start_node_id, short_channel_id)] = msg_payload |
||||
|
||||
@sql |
||||
def remove_channel(self, short_channel_id): |
||||
r = self.DBSession.query(ChannelInfo).filter_by(short_channel_id = short_channel_id.hex()).one_or_none() |
||||
if not r: |
||||
return |
||||
self.DBSession.delete(r) |
||||
self.DBSession.commit() |
||||
|
||||
def print_graph(self, full_ids=False): |
||||
# used for debugging. |
||||
# FIXME there is a race here - iterables could change size from another thread |
||||
def other_node_id(node_id, channel_id): |
||||
channel_info = self.get_channel_info(channel_id) |
||||
if node_id == channel_info.node1_id: |
||||
other = channel_info.node2_id |
||||
else: |
||||
other = channel_info.node1_id |
||||
return other if full_ids else other[-4:] |
||||
|
||||
print_msg('nodes') |
||||
for node in self.DBSession.query(NodeInfo).all(): |
||||
print_msg(node) |
||||
|
||||
print_msg('channels') |
||||
for channel_info in self.DBSession.query(ChannelInfo).all(): |
||||
short_channel_id = channel_info.short_channel_id |
||||
node1 = channel_info.node1_id |
||||
node2 = channel_info.node2_id |
||||
direction1 = self.get_policy_for_node(channel_info, node1) is not None |
||||
direction2 = self.get_policy_for_node(channel_info, node2) is not None |
||||
if direction1 and direction2: |
||||
direction = 'both' |
||||
elif direction1: |
||||
direction = 'forward' |
||||
elif direction2: |
||||
direction = 'backward' |
||||
else: |
||||
direction = 'none' |
||||
print_msg('{}: {}, {}, {}' |
||||
.format(bh2u(short_channel_id), |
||||
bh2u(node1) if full_ids else bh2u(node1[-4:]), |
||||
bh2u(node2) if full_ids else bh2u(node2[-4:]), |
||||
direction)) |
||||
|
||||
|
||||
@sql |
||||
def get_node_addresses(self, node_info): |
||||
return self.DBSession.query(Address).join(NodeInfo).filter_by(node_id = node_info.node_id).all() |
||||
|
||||
@sql |
||||
@profiler |
||||
def load_data(self): |
||||
r = self.DBSession.query(ChannelInfo).all() |
||||
self._channels = dict([(bfh(x.short_channel_id), x) for x in r]) |
||||
r = self.DBSession.query(Policy).filter_by().all() |
||||
self._policies = dict([((bfh(x.start_node), bfh(x.short_channel_id)), x) for x in r]) |
||||
self._channels_for_node = defaultdict(set) |
||||
for channel_info in self._channels.values(): |
||||
self._channels_for_node[bfh(channel_info.node1_id)].add(bfh(channel_info.short_channel_id)) |
||||
self._channels_for_node[bfh(channel_info.node2_id)].add(bfh(channel_info.short_channel_id)) |
||||
self.logger.info(f'load data {len(self._channels)} {len(self._policies)} {len(self._channels_for_node)}') |
||||
|
||||
def get_policy_for_node(self, short_channel_id: bytes, node_id: bytes) -> Optional['Policy']: |
||||
return self._policies.get((node_id, short_channel_id)) |
||||
|
||||
def get_channel_info(self, channel_id: bytes): |
||||
return self._channels.get(channel_id) |
||||
|
||||
def get_channels_for_node(self, node_id) -> Set[bytes]: |
||||
"""Returns the set of channels that have node_id as one of the endpoints.""" |
||||
return self._channels_for_node.get(node_id) or set() |
||||
|
||||
|
||||
|
||||
Loading…
Reference in new issue