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500 lines
16 KiB
500 lines
16 KiB
import json
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import threading
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import time
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import os
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import stat
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from copy import deepcopy
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from .util import (user_dir, print_error, PrintError,
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NoDynamicFeeEstimates, format_satoshis)
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from .i18n import _
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FEE_ETA_TARGETS = [25, 10, 5, 2]
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FEE_DEPTH_TARGETS = [10000000, 5000000, 2000000, 1000000, 500000, 200000, 100000]
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# satoshi per kbyte
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FEERATE_MAX_DYNAMIC = 1500000
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FEERATE_WARNING_HIGH_FEE = 600000
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FEERATE_FALLBACK_STATIC_FEE = 150000
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FEERATE_DEFAULT_RELAY = 1000
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FEERATE_STATIC_VALUES = [5000, 10000, 20000, 30000, 50000, 70000, 100000, 150000, 200000, 300000]
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config = None
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def get_config():
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global config
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return config
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def set_config(c):
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global config
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config = c
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FINAL_CONFIG_VERSION = 2
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class SimpleConfig(PrintError):
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"""
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The SimpleConfig class is responsible for handling operations involving
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configuration files.
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There are two different sources of possible configuration values:
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1. Command line options.
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2. User configuration (in the user's config directory)
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They are taken in order (1. overrides config options set in 2.)
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"""
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def __init__(self, options=None, read_user_config_function=None,
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read_user_dir_function=None):
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if options is None:
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options = {}
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# This lock needs to be acquired for updating and reading the config in
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# a thread-safe way.
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self.lock = threading.RLock()
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self.mempool_fees = {}
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self.fee_estimates = {}
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self.fee_estimates_last_updated = {}
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self.last_time_fee_estimates_requested = 0 # zero ensures immediate fees
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# The following two functions are there for dependency injection when
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# testing.
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if read_user_config_function is None:
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read_user_config_function = read_user_config
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if read_user_dir_function is None:
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self.user_dir = user_dir
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else:
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self.user_dir = read_user_dir_function
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# The command line options
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self.cmdline_options = deepcopy(options)
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# don't allow to be set on CLI:
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self.cmdline_options.pop('config_version', None)
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# Set self.path and read the user config
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self.user_config = {} # for self.get in electrum_path()
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self.path = self.electrum_path()
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self.user_config = read_user_config_function(self.path)
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if not self.user_config:
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# avoid new config getting upgraded
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self.user_config = {'config_version': FINAL_CONFIG_VERSION}
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# config "upgrade" - CLI options
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self.rename_config_keys(
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self.cmdline_options, {'auto_cycle': 'auto_connect'}, True)
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# config upgrade - user config
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if self.requires_upgrade():
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self.upgrade()
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# Make a singleton instance of 'self'
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set_config(self)
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def electrum_path(self):
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# Read electrum_path from command line
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# Otherwise use the user's default data directory.
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path = self.get('electrum_path')
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if path is None:
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path = self.user_dir()
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def make_dir(path):
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# Make directory if it does not yet exist.
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if not os.path.exists(path):
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if os.path.islink(path):
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raise BaseException('Dangling link: ' + path)
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os.mkdir(path)
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os.chmod(path, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR)
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make_dir(path)
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if self.get('testnet'):
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path = os.path.join(path, 'testnet')
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make_dir(path)
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self.print_error("electrum directory", path)
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return path
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def rename_config_keys(self, config, keypairs, deprecation_warning=False):
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"""Migrate old key names to new ones"""
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updated = False
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for old_key, new_key in keypairs.items():
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if old_key in config:
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if new_key not in config:
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config[new_key] = config[old_key]
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if deprecation_warning:
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self.print_stderr('Note that the {} variable has been deprecated. '
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'You should use {} instead.'.format(old_key, new_key))
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del config[old_key]
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updated = True
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return updated
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def set_key(self, key, value, save=True):
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if not self.is_modifiable(key):
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self.print_stderr("Warning: not changing config key '%s' set on the command line" % key)
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return
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self._set_key_in_user_config(key, value, save)
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def _set_key_in_user_config(self, key, value, save=True):
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with self.lock:
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if value is not None:
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self.user_config[key] = value
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else:
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self.user_config.pop(key, None)
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if save:
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self.save_user_config()
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def get(self, key, default=None):
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with self.lock:
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out = self.cmdline_options.get(key)
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if out is None:
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out = self.user_config.get(key, default)
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return out
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def requires_upgrade(self):
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return self.get_config_version() < FINAL_CONFIG_VERSION
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def upgrade(self):
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with self.lock:
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self.print_error('upgrading config')
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self.convert_version_2()
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self.set_key('config_version', FINAL_CONFIG_VERSION, save=True)
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def convert_version_2(self):
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if not self._is_upgrade_method_needed(1, 1):
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return
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self.rename_config_keys(self.user_config, {'auto_cycle': 'auto_connect'})
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try:
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# change server string FROM host:port:proto TO host:port:s
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server_str = self.user_config.get('server')
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host, port, protocol = str(server_str).rsplit(':', 2)
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assert protocol in ('s', 't')
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int(port) # Throw if cannot be converted to int
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server_str = '{}:{}:s'.format(host, port)
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self._set_key_in_user_config('server', server_str)
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except BaseException:
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self._set_key_in_user_config('server', None)
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self.set_key('config_version', 2)
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def _is_upgrade_method_needed(self, min_version, max_version):
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cur_version = self.get_config_version()
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if cur_version > max_version:
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return False
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elif cur_version < min_version:
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raise BaseException(
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('config upgrade: unexpected version %d (should be %d-%d)'
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% (cur_version, min_version, max_version)))
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else:
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return True
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def get_config_version(self):
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config_version = self.get('config_version', 1)
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if config_version > FINAL_CONFIG_VERSION:
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self.print_stderr('WARNING: config version ({}) is higher than ours ({})'
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.format(config_version, FINAL_CONFIG_VERSION))
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return config_version
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def is_modifiable(self, key):
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return key not in self.cmdline_options
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def save_user_config(self):
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if not self.path:
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return
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path = os.path.join(self.path, "config")
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s = json.dumps(self.user_config, indent=4, sort_keys=True)
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with open(path, "w") as f:
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f.write(s)
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os.chmod(path, stat.S_IREAD | stat.S_IWRITE)
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def get_wallet_path(self):
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"""Set the path of the wallet."""
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# command line -w option
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if self.get('wallet_path'):
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return os.path.join(self.get('cwd'), self.get('wallet_path'))
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# path in config file
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path = self.get('default_wallet_path')
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if path and os.path.exists(path):
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return path
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# default path
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dirpath = os.path.join(self.path, "wallets")
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if not os.path.exists(dirpath):
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if os.path.islink(dirpath):
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raise BaseException('Dangling link: ' + dirpath)
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os.mkdir(dirpath)
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os.chmod(dirpath, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR)
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new_path = os.path.join(self.path, "wallets", "default_wallet")
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# default path in pre 1.9 versions
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old_path = os.path.join(self.path, "electrum.dat")
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if os.path.exists(old_path) and not os.path.exists(new_path):
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os.rename(old_path, new_path)
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return new_path
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def remove_from_recently_open(self, filename):
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recent = self.get('recently_open', [])
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if filename in recent:
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recent.remove(filename)
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self.set_key('recently_open', recent)
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def set_session_timeout(self, seconds):
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self.print_error("session timeout -> %d seconds" % seconds)
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self.set_key('session_timeout', seconds)
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def get_session_timeout(self):
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return self.get('session_timeout', 300)
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def open_last_wallet(self):
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if self.get('wallet_path') is None:
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last_wallet = self.get('gui_last_wallet')
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if last_wallet is not None and os.path.exists(last_wallet):
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self.cmdline_options['default_wallet_path'] = last_wallet
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def save_last_wallet(self, wallet):
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if self.get('wallet_path') is None:
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path = wallet.storage.path
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self.set_key('gui_last_wallet', path)
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def impose_hard_limits_on_fee(func):
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def get_fee_within_limits(self, *args, **kwargs):
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fee = func(self, *args, **kwargs)
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if fee is None:
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return fee
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fee = min(FEERATE_MAX_DYNAMIC, fee)
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fee = max(FEERATE_DEFAULT_RELAY, fee)
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return fee
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return get_fee_within_limits
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@impose_hard_limits_on_fee
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def eta_to_fee(self, i):
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"""Returns fee in sat/kbyte."""
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if i < 4:
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j = FEE_ETA_TARGETS[i]
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fee = self.fee_estimates.get(j)
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else:
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assert i == 4
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fee = self.fee_estimates.get(2)
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if fee is not None:
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fee += fee/2
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return fee
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def fee_to_depth(self, target_fee):
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depth = 0
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for fee, s in self.mempool_fees:
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depth += s
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if fee <= target_fee:
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break
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else:
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return 0
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return depth
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@impose_hard_limits_on_fee
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def depth_to_fee(self, i):
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"""Returns fee in sat/kbyte."""
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target = self.depth_target(i)
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depth = 0
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for fee, s in self.mempool_fees:
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depth += s
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if depth > target:
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break
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else:
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return 0
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return fee * 1000
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def depth_target(self, i):
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return FEE_DEPTH_TARGETS[i]
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def eta_target(self, i):
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if i == len(FEE_ETA_TARGETS):
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return 1
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return FEE_ETA_TARGETS[i]
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def fee_to_eta(self, fee_per_kb):
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import operator
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l = list(self.fee_estimates.items()) + [(1, self.eta_to_fee(4))]
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dist = map(lambda x: (x[0], abs(x[1] - fee_per_kb)), l)
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min_target, min_value = min(dist, key=operator.itemgetter(1))
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if fee_per_kb < self.fee_estimates.get(25)/2:
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min_target = -1
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return min_target
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def depth_tooltip(self, depth):
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return "%.1f MB from tip"%(depth/1000000)
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def eta_tooltip(self, x):
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if x < 0:
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return _('Low fee')
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elif x == 1:
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return _('In the next block')
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else:
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return _('Within {} blocks').format(x)
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def get_fee_status(self):
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dyn = self.is_dynfee()
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mempool = self.use_mempool_fees()
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pos = self.get_depth_level() if mempool else self.get_fee_level()
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fee_rate = self.fee_per_kb()
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target, tooltip = self.get_fee_text(pos, dyn, mempool, fee_rate)
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return tooltip + ' [%s]'%target if dyn else target + ' [Static]'
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def get_fee_text(self, pos, dyn, mempool, fee_rate):
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"""Returns (text, tooltip) where
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text is what we target: static fee / num blocks to confirm in / mempool depth
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tooltip is the corresponding estimate (e.g. num blocks for a static fee)
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"""
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rate_str = (format_satoshis(fee_rate/1000, False, 0, 0, False) + ' sat/byte') if fee_rate is not None else 'unknown'
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if dyn:
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if mempool:
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depth = self.depth_target(pos)
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text = self.depth_tooltip(depth)
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else:
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eta = self.eta_target(pos)
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text = self.eta_tooltip(eta)
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tooltip = rate_str
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else:
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text = rate_str
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if mempool and self.has_fee_mempool():
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depth = self.fee_to_depth(fee_rate)
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tooltip = self.depth_tooltip(depth)
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elif not mempool and self.has_fee_etas():
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eta = self.fee_to_eta(fee_rate)
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tooltip = self.eta_tooltip(eta)
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else:
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tooltip = ''
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return text, tooltip
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def get_depth_level(self):
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maxp = len(FEE_DEPTH_TARGETS) - 1
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return min(maxp, self.get('depth_level', 2))
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def get_fee_level(self):
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maxp = len(FEE_ETA_TARGETS) # not (-1) to have "next block"
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return min(maxp, self.get('fee_level', 2))
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def get_fee_slider(self, dyn, mempool):
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if dyn:
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if mempool:
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pos = self.get_depth_level()
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maxp = len(FEE_DEPTH_TARGETS) - 1
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fee_rate = self.depth_to_fee(pos)
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else:
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pos = self.get_fee_level()
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maxp = len(FEE_ETA_TARGETS) # not (-1) to have "next block"
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fee_rate = self.eta_to_fee(pos)
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else:
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fee_rate = self.fee_per_kb()
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pos = self.static_fee_index(fee_rate)
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maxp = 9
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return maxp, pos, fee_rate
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def static_fee(self, i):
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return FEERATE_STATIC_VALUES[i]
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def static_fee_index(self, value):
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dist = list(map(lambda x: abs(x - value), FEERATE_STATIC_VALUES))
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return min(range(len(dist)), key=dist.__getitem__)
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def has_fee_etas(self):
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return len(self.fee_estimates) == 4
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def has_fee_mempool(self):
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return bool(self.mempool_fees)
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def has_dynamic_fees_ready(self):
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if self.use_mempool_fees():
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return self.has_fee_mempool()
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else:
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return self.has_fee_etas()
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def is_dynfee(self):
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return bool(self.get('dynamic_fees', True))
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def use_mempool_fees(self):
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return bool(self.get('mempool_fees', False))
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def fee_per_kb(self):
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"""Returns sat/kvB fee to pay for a txn.
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Note: might return None.
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"""
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if self.is_dynfee():
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if self.use_mempool_fees():
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fee_rate = self.depth_to_fee(self.get_depth_level())
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else:
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fee_rate = self.eta_to_fee(self.get_fee_level())
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else:
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fee_rate = self.get('fee_per_kb', FEERATE_FALLBACK_STATIC_FEE)
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return fee_rate
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def fee_per_byte(self):
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"""Returns sat/vB fee to pay for a txn.
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Note: might return None.
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"""
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fee_per_kb = self.fee_per_kb()
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return fee_per_kb / 1000 if fee_per_kb is not None else None
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def estimate_fee(self, size):
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fee_per_kb = self.fee_per_kb()
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if fee_per_kb is None:
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raise NoDynamicFeeEstimates()
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return self.estimate_fee_for_feerate(fee_per_kb, size)
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@classmethod
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def estimate_fee_for_feerate(cls, fee_per_kb, size):
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# note: We only allow integer sat/byte values atm.
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# The GUI for simplicity reasons only displays integer sat/byte,
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# and for the sake of consistency, we thus only use integer sat/byte in
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# the backend too.
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fee_per_byte = int(fee_per_kb / 1000)
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return int(fee_per_byte * size)
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def update_fee_estimates(self, key, value):
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self.fee_estimates[key] = value
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self.fee_estimates_last_updated[key] = time.time()
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def is_fee_estimates_update_required(self):
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"""Checks time since last requested and updated fee estimates.
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Returns True if an update should be requested.
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"""
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now = time.time()
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return now - self.last_time_fee_estimates_requested > 60
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def requested_fee_estimates(self):
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self.last_time_fee_estimates_requested = time.time()
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def get_video_device(self):
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device = self.get("video_device", "default")
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if device == 'default':
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device = ''
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return device
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def read_user_config(path):
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"""Parse and store the user config settings in electrum.conf into user_config[]."""
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if not path:
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return {}
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config_path = os.path.join(path, "config")
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if not os.path.exists(config_path):
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return {}
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try:
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with open(config_path, "r") as f:
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data = f.read()
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result = json.loads(data)
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except:
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print_error("Warning: Cannot read config file.", config_path)
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return {}
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if not type(result) is dict:
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return {}
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return result
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