87 lines
2.6 KiB
Python
Executable file
87 lines
2.6 KiB
Python
Executable file
#!/usr/bin/env python3
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#
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# MMGen Wallet, a terminal-based cryptocurrency wallet
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# Copyright (C)2013-2024 The MMGen Project <mmgen@tuta.io>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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flags: Class flags and opts for the MMGen suite
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"""
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from .base_obj import AttrCtrl,Lockable
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from .util import fmt_list,die
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class ClassFlags(AttrCtrl):
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_name = 'flags'
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_desc = 'flag'
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reserved_attrs = ()
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def __init__(self,parent,arg):
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self._parent = parent
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self._available = getattr(self._parent,'avail_'+self._name)
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for a in self._available:
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if a.startswith('_'):
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die( 'ClassFlagsError', f'{a!r}: {self._desc} cannot begin with an underscore' )
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for b in self.reserved_attrs:
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if a == b:
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die( 'ClassFlagsError', f'{a!r}: {b} is a reserved name for {self._desc}' )
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if arg:
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assert type(arg) in (list,tuple), f"{arg!r}: {self._name!r} must be list or tuple"
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else:
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arg = []
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for e in arg:
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if e not in self._available:
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self.not_available_error(e)
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for e in self._available:
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setattr(self,e,e in arg)
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def __dir__(self):
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return [k for k in self.__dict__ if not k.startswith('_') and not k in self.reserved_attrs]
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def __str__(self):
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return ' '.join(f'{k}={getattr(self,k)}' for k in dir(self))
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def __setattr__(self,name,val):
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if self._locked:
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if name not in self._available:
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self.not_available_error(name)
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if self._name == 'flags':
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assert isinstance(val,bool), f'{val!r} not boolean'
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old_val = getattr(self,name)
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if val and old_val:
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die( 'ClassFlagsError', f'{self._desc} {name!r} already set' )
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if not val and not old_val:
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die( 'ClassFlagsError', f'{self._desc} {name!r} not set, so cannot be unset' )
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super().__setattr__(name,val)
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def not_available_error(self,name):
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die( 'ClassFlagsError', '{!r}: unrecognized {} for {}: (available {}: {})'.format(
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name,
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self._desc,
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type(self._parent).__name__,
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self._name,
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fmt_list(self._available,fmt='bare') ))
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class ClassOpts(ClassFlags,Lockable):
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_name = 'opts'
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_desc = 'opt'
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