Contract con_how2testnet

  

    

      

        

            
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metadata = Hash()

          

            
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data = Hash(default_value=0)

          

            
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@construct

          

            
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def seed():

          

            
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    metadata['operator'] = ctx.caller

          

            
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@export

          

            
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def change_metadata(key: str, new_value: str):

          

            
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    assert ctx.caller == metadata['operator'], "only operator can set metadata"

          

            
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    metadata[key] = new_value

          

            
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@export

          

            
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def new_migration_window(migrator_id : str, contract: str, open_until_year : int, open_until_month : int, open_until_day : int, open_until_hour: int = 0):

          

            
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    assert metadata['operator']== ctx.caller, "You are not the owner and cannot creator a migrating window."

          

            
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    assert bool(data[migrator_id, 'migrator_owner']) == False, "This migrator has already been created, please create one with a different name."

          

            
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    assert open_until_day != None, 'Must provide end day of migration window!'

          

            
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    assert open_until_month != None, 'Must provide end month of migration window!'

          

            
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    assert open_until_year != None, 'Must provide end year of migration window!'

          

            
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    assert datetime.datetime(year=open_until_year, month=open_until_month, day=open_until_day, hour=open_until_hour) >= now, 'Migration window end cannot be in the past!'

          

            
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    data[migrator_id, 'migrator_owner'] = ctx.caller

          

            
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    data[migrator_id, 'contract'] = contract

          

            
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    data[migrator_id, 'migrated_wallets'] = {}

          

            
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    data[migrator_id, 'total_migrated'] = 0

          

            
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    data[migrator_id, 'end_date'] = datetime.datetime(year=open_until_year, month=open_until_month, day=open_until_day, hour=open_until_hour, minute=0, microsecond=0)

          

            
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@export

          

            
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def migrate_token(migrator_id: str, tokens_to_migrate: float, contract: str):

          

            
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    assert contract == data[migrator_id, 'contract'], f"The contract does not match the token migration contract of {data[migrator_id, 'contract']}."

          

            
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    assert data[migrator_id, 'end_date'] >= now, 'You can not migrate tokens using this migrator as the period has ended.'

          

            
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    migrated_wallets = data[migrator_id, 'migrated_wallets']

          

            
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    token = importlib.import_module(contract)

          

            
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    token.transfer_from(amount=tokens_to_migrate, to=ctx.this, main_account=ctx.caller)

          

            
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    if ctx.caller not in migrated_wallets:

          

            
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        migrated_wallets.update({ctx.caller: tokens_to_migrate})

          

            
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    else:

          

            
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        migrated_wallets[ctx.caller] += tokens_to_migrate

          

            
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    data[migrator_id, 'migrated_wallets'] = migrated_wallets

          

            
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    data[migrator_id, 'total_migrated'] += tokens_to_migrate

          

            
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@export

          

            
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def list_migrators(migrator_id: str):

          

            
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    assert now >= data[migrator_id, 'end_date'], f"This token migrator has not ended yet. It will end on {data[migrator_id, 'end_date']}."

          

            
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    migrated_wallets = data[migrator_id, 'migrated_wallets']

          

            
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    return migrated_wallets
          
      
    
  
  

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