data events[]
data creator

def init():
    self.creator = msg.sender

def update_creator(creator_address):
    if msg.sender == self.creator:
        self.creator = creator_address

def set_winning_outcome(event_hash, outcome):
    if msg.sender == self.creator and not self.events[event_hash]:
        self.events[event_hash] = outcome

def get_winning_outcome(event_hash):
    return self.events[event_hash]