Contract con_dec_fix_6_tad

  

    

      

        

            
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balances = Hash(default_value=0)

          

            
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metadata = Hash()

          

            
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operator = Variable()

          

            
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total_supply = Variable()

          

            
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@construct

          

            
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def seed(owner: str):

          

            
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    total_supply.set(0)

          

            
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    operator.set(owner)

          

            
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    metadata['token_name'] = 'RubixDAO'

          

            
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    metadata['token_symbol'] = 'lMKR'

          

            
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    metadata['token_logo_url'] = 'image.site'

          

            
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    metadata['operator'] = ctx.caller

          

            
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@export

          

            
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def transfer(amount: float, to: str):

          

            
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    assert amount > 0, 'Cannot send negative balances!'

          

            
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    sender = ctx.caller

          

            
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    assert balances[sender] >= amount, 'Not enough coins to send!'

          

            
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    balances[sender] -= amount

          

            
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    balances[to] += amount

          

            
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@export

          

            
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def balance_of(account: str):

          

            
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    return balances[account]

          

            
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@export

          

            
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def allowance(owner: str, spender: str):

          

            
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    return balances[owner, spender]

          

            
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@export

          

            
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def approve(amount: float, to: str):

          

            
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    assert amount > 0, 'Cannot send negative balances!'

          

            
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    sender = ctx.caller

          

            
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    balances[sender, to] += amount

          

            
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    return balances[sender, to]

          

            
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@export

          

            
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def transfer_from(amount: float, to: str, main_account: str):

          

            
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    assert amount > 0, 'Cannot send negative balances!'

          

            
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    sender = ctx.caller

          

            
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    assert balances[main_account] >= amount, 'Not enough coins to send!'

          

            
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    assert balances[main_account, sender] >= amount, 'Not enough coins approved to send! You have {} and are trying to spend {}'\

          

            
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        .format(balances[main_account, sender], amount)

          

            
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    balances[main_account, sender] -= amount

          

            
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    balances[main_account] -= amount

          

            
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    balances[to] += amount

          

            
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@export

          

            
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def mint(amount: float):

          

            
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    assert_owner()

          

            
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    assert amount > 0, 'Cannot mint negative balances!'

          

            
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    sender = ctx.caller

          

            
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    balances[sender] += amount

          

            
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    total = total_supply.get() + amount

          

            
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    total_supply.set(total)

          

            
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@export

          

            
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def burn(amount: float):

          

            
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    assert amount > 0, 'Cannot burn negative balances!'

          

            
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    sender = ctx.caller

          

            
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    assert balances[sender] >= amount, 'Not enough coins to burn!'

          

            
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    balances[sender] -= amount

          

            
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    total = total_supply.get() - amount

          

            
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    total_supply.set(total)

          

            
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@export

          

            
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def get_total_supply():

          

            
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    return total_supply.get()

          

            
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@export

          

            
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def change_metadata(key: str, value: Any):

          

            
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    assert ctx.caller == metadata['operator'], 'Only operator can set metadata!'

          

            
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    metadata[key] = value

          

            
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@export

          

            
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def change_owner(new_owner: str):

          

            
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    assert_owner()

          

            
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    operator.set(new_owner)

          

            
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def assert_owner():

          

            
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    assert ctx.caller == operator.get(), 'Only operator can call!'
          
      
    
  
  

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