basicswap_miserver/basicswap/base.py

# -*- coding: utf-8 -*-

# Copyright (c) 2019-2023 tecnovert
# Distributed under the MIT software license, see the accompanying
# file LICENSE or http://www.opensource.org/licenses/mit-license.php.

import os
import time
import shlex
import socks
import socket
import urllib
import logging
import threading
import traceback
import subprocess

from sockshandler import SocksiPyHandler

from .rpc import (
    callrpc,
)
from .util import (
    TemporaryError,
)
from .chainparams import (
    Coins,
    chainparams,
)


def getaddrinfo_tor(*args):
    return [(socket.AF_INET, socket.SOCK_STREAM, 6, "", (args[0], args[1]))]


class BaseApp:
    def __init__(self, fp, data_dir, settings, chain, log_name='BasicSwap'):
        self.log_name = log_name
        self.fp = fp
        self.fail_code = 0
        self.mock_time_offset = 0

        self.data_dir = data_dir
        self.chain = chain
        self.settings = settings
        self.coin_clients = {}
        self.coin_interfaces = {}
        self.mxDB = threading.RLock()
        self.debug = self.settings.get('debug', False)
        self.delay_event = threading.Event()
        self.chainstate_delay_event = threading.Event()

        self._network = None
        self.prepareLogging()
        self.log.info('Network: {}'.format(self.chain))

        self.use_tor_proxy = self.settings.get('use_tor', False)
        self.tor_proxy_host = self.settings.get('tor_proxy_host', '127.0.0.1')
        self.tor_proxy_port = self.settings.get('tor_proxy_port', 9050)
        self.tor_control_password = self.settings.get('tor_control_password', None)
        self.tor_control_port = self.settings.get('tor_control_port', 9051)
        self.default_socket = socket.socket
        self.default_socket_timeout = socket.getdefaulttimeout()
        self.default_socket_getaddrinfo = socket.getaddrinfo

    def stopRunning(self, with_code=0):
        self.fail_code = with_code
        with self.mxDB:
            self.chainstate_delay_event.set()
            self.delay_event.set()

    def prepareLogging(self):
        self.log = logging.getLogger(self.log_name)
        self.log.propagate = False

        # Remove any existing handlers
        self.log.handlers = []

        formatter = logging.Formatter('%(asctime)s %(levelname)s : %(message)s')
        stream_stdout = logging.StreamHandler()
        if self.log_name != 'BasicSwap':
            stream_stdout.setFormatter(logging.Formatter('%(asctime)s %(name)s %(levelname)s : %(message)s'))
        else:
            stream_stdout.setFormatter(formatter)
        stream_fp = logging.StreamHandler(self.fp)
        stream_fp.setFormatter(formatter)

        self.log.setLevel(logging.DEBUG if self.debug else logging.INFO)
        self.log.addHandler(stream_fp)
        self.log.addHandler(stream_stdout)

    def getChainClientSettings(self, coin):
        try:
            return self.settings['chainclients'][chainparams[coin]['name']]
        except Exception:
            return {}

    def setDaemonPID(self, name, pid) -> None:
        if isinstance(name, Coins):
            self.coin_clients[name]['pid'] = pid
            return
        for c, v in self.coin_clients.items():
            if v['name'] == name:
                v['pid'] = pid

    def getChainDatadirPath(self, coin) -> str:
        datadir = self.coin_clients[coin]['datadir']
        testnet_name = '' if self.chain == 'mainnet' else chainparams[coin][self.chain].get('name', self.chain)
        return os.path.join(datadir, testnet_name)

    def getCoinIdFromName(self, coin_name: str):
        for c, params in chainparams.items():
            if coin_name.lower() == params['name'].lower():
                return c
        raise ValueError('Unknown coin: {}'.format(coin_name))

    def callrpc(self, method, params=[], wallet=None):
        cc = self.coin_clients[Coins.PART]
        return callrpc(cc['rpcport'], cc['rpcauth'], method, params, wallet, cc['rpchost'])

    def callcoinrpc(self, coin, method, params=[], wallet=None):
        cc = self.coin_clients[coin]
        return callrpc(cc['rpcport'], cc['rpcauth'], method, params, wallet, cc['rpchost'])

    def callcoincli(self, coin_type, params, wallet=None, timeout=None):
        bindir = self.coin_clients[coin_type]['bindir']
        datadir = self.coin_clients[coin_type]['datadir']
        command_cli = os.path.join(bindir, chainparams[coin_type]['name'] + '-cli' + ('.exe' if os.name == 'nt' else ''))
        args = [command_cli, ]
        if self.chain != 'mainnet':
            args.append('-' + self.chain)
        args.append('-datadir=' + datadir)
        args += shlex.split(params)
        p = subprocess.Popen(args, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        out = p.communicate(timeout=timeout)
        if len(out[1]) > 0:
            raise ValueError('CLI error ' + str(out[1]))
        return out[0].decode('utf-8').strip()

    def is_transient_error(self, ex) -> bool:
        if isinstance(ex, TemporaryError):
            return True
        str_error = str(ex).lower()
        return 'read timed out' in str_error or 'no connection to daemon' in str_error

    def setConnectionParameters(self, timeout=120):
        opener = urllib.request.build_opener()
        opener.addheaders = [('User-agent', 'Mozilla/5.0')]
        urllib.request.install_opener(opener)

        if self.use_tor_proxy:
            socks.setdefaultproxy(socks.PROXY_TYPE_SOCKS5, self.tor_proxy_host, self.tor_proxy_port, rdns=True)
            socket.socket = socks.socksocket
            socket.getaddrinfo = getaddrinfo_tor  # Without this accessing .onion links would fail

        socket.setdefaulttimeout(timeout)

    def popConnectionParameters(self) -> None:
        if self.use_tor_proxy:
            socket.socket = self.default_socket
            socket.getaddrinfo = self.default_socket_getaddrinfo
        socket.setdefaulttimeout(self.default_socket_timeout)

    def readURL(self, url: str, timeout: int = 120, headers=None) -> bytes:
        open_handler = None
        if self.use_tor_proxy:
            open_handler = SocksiPyHandler(socks.PROXY_TYPE_SOCKS5, self.tor_proxy_host, self.tor_proxy_port)
        opener = urllib.request.build_opener(open_handler) if self.use_tor_proxy else urllib.request.build_opener()
        opener.addheaders = [('User-agent', 'Mozilla/5.0')]
        request = urllib.request.Request(url, headers=headers)
        return opener.open(request, timeout=timeout).read()

    def logException(self, message) -> None:
        self.log.error(message)
        if self.debug:
            self.log.error(traceback.format_exc())

    def torControl(self, query):
        try:
            command = 'AUTHENTICATE "{}"\r\n{}\r\nQUIT\r\n'.format(self.tor_control_password, query).encode('utf-8')
            c = socket.create_connection((self.tor_proxy_host, self.tor_control_port))
            c.send(command)
            response = bytearray()
            while True:
                rv = c.recv(1024)
                if not rv:
                    break
                response += rv
            c.close()
            return response
        except Exception as e:
            self.log.error(f'torControl {e}')
            return

    def getTime(self) -> int:
        return int(time.time()) + self.mock_time_offset

    def setMockTimeOffset(self, new_offset: int) -> None:
        self.log.warning(f'Setting mocktime to {new_offset}')
        self.mock_time_offset = new_offset