Contract masternodes
| Created On | NaN secs ago - Invalid Date UTC+0 |
Contract Code
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INTRODUCE_MOTION = 'introduce_motion'
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VOTE_ON_MOTION = 'vote_on_motion'
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NO_MOTION = 0
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REMOVE_MEMBER = 1
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ADD_SEAT = 2
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REMOVE_SEAT = 3
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VOTING_PERIOD = datetime.DAYS * 1
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__S = Hash(contract='masternodes', name='S')
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__minimum_nodes = Variable(contract='masternodes', name='minimum_nodes')
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__candidate_contract = Variable(contract='masternodes', name=
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'candidate_contract')
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def ____(initial_members: list, minimum: int=1, candidate: str='elect_members'
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):
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__S['members'] = initial_members
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__minimum_nodes.set(minimum)
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__candidate_contract.set(candidate)
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__S['yays'] = 0
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__S['nays'] = 0
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__S['current_motion'] = NO_MOTION
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__S['motion_opened'] = now
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@__export('masternodes')
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def quorum_max():
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return int(len(__S['members']) * 2 / 3) + 1
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@__export('masternodes')
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def quorum_min():
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return min(quorum_max(), __minimum_nodes.get())
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@__export('masternodes')
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def current_value():
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return __S['members']
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@__export('masternodes')
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def vote(vk: str, obj: list):
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assert type(obj) == list, 'Pass a list!'
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arg = None
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try:
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action, position, arg = obj
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except ValueError:
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action, position = obj
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__assert_vote_is_valid(vk, action, position, arg)
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if action == INTRODUCE_MOTION:
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__introduce_motion(position, arg)
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else:
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assert __S['current_motion'] != NO_MOTION, 'No motion proposed.'
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assert __S['positions', vk] is None, 'VK already voted.'
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if position is True:
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__S['yays'] += 1
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__S['positions', vk] = position
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else:
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__S['nays'] += 1
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__S['positions', vk] = position
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if __S['yays'] >= len(__S['members']) // 2 + 1:
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__pass_current_motion()
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__reset()
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elif __S['nays'] >= len(__S['members']) // 2 + 1:
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__reset()
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elif now - __S['motion_opened'] >= VOTING_PERIOD:
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__reset()
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def __assert_vote_is_valid(vk: str, action: str, position: bool, arg: Any=None
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):
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assert vk in __S['members'], 'Not a member.'
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assert action in [INTRODUCE_MOTION, VOTE_ON_MOTION], 'Invalid action.'
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if action == INTRODUCE_MOTION:
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assert __S['current_motion'] == NO_MOTION, 'Already in motion.'
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assert 0 < position <= REMOVE_SEAT, 'Invalid motion.'
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if position == REMOVE_MEMBER:
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__assert_vk_is_valid(arg)
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elif action == VOTE_ON_MOTION:
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assert type(position) == bool, 'Invalid position'
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def __assert_vk_is_valid(vk: str):
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assert vk is not None, 'No VK provided.'
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assert type(vk) == str, 'VK not a string.'
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assert len(vk) == 64, 'VK is not 64 characters.'
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int(vk, 16)
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def __introduce_motion(position: int, arg: Any):
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assert position <= REMOVE_SEAT, 'Invalid position.'
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if position == REMOVE_MEMBER:
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assert arg in __S['members'], 'Member does not exist.'
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assert len(__S['members']) > __minimum_nodes.get(
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), 'Cannot drop below current quorum.'
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__S['member_in_question'] = arg
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__S['current_motion'] = position
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__S['motion_opened'] = now
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def __pass_current_motion():
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current_motion = __S['current_motion']
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members = __S['members']
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if current_motion == REMOVE_MEMBER:
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members.remove(__S['member_in_question'])
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elif current_motion == ADD_SEAT:
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member_candidates = importlib.import_module(__candidate_contract.get())
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new_mem = member_candidates.top_member()
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if new_mem is not None:
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members.append(new_mem)
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member_candidates.pop_top()
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elif current_motion == REMOVE_SEAT:
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member_candidates = importlib.import_module(__candidate_contract.get())
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old_mem = member_candidates.last_member()
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if old_mem is not None:
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members.remove(old_mem)
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member_candidates.pop_last()
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__S['members'] = members
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def __reset():
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__S['current_motion'] = NO_MOTION
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__S['member_in_question'] = None
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__S['yays'] = 0
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__S['nays'] = 0
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__S.clear('positions')
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