Contract con_doug_lst001

  

    

      

        

            
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__balances = Hash(default_value=0, contract='con_doug_lst001', name='balances')
          

            
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__metadata = Hash(contract='con_doug_lst001', name='metadata')
          

            
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def ____():
          

            
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    __balances[
          

            
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        '6656a5c9dcf37f7eadc2b7d8de1998bb5bc4d69244ce75642dd57274feae93db'
          

            
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        ] = 100000000
          

            
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    __metadata['token_name'] = 'Super Doug Dash'
          

            
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    __metadata['token_symbol'] = 'DOUG'
          

            
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    __metadata['operator'
          

            
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        ] = '6656a5c9dcf37f7eadc2b7d8de1998bb5bc4d69244ce75642dd57274feae93db'
          

            
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@__export('con_doug_lst001')
          

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

            
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    assert ctx.caller == __metadata['operator'
          

            
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        ], 'Only operator can set metadata!'
          

            
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    __metadata[key] = value
          

            
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@__export('con_doug_lst001')
          

            
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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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    assert __balances[ctx.caller] >= amount, 'Not enough coins to send!'
          

            
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    __balances[ctx.caller] -= amount
          

            
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    __balances[to] += amount
          

            
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@__export('con_doug_lst001')
          

            
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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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    __balances[ctx.caller, to] += amount
          

            
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@__export('con_doug_lst001')
          

            
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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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    assert __balances[main_account, ctx.caller
          

            
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        ] >= amount, 'Not enough coins approved to send! You have {} and are trying to spend {}'.format(
          

            
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        __balances[main_account, ctx.caller], amount)
          

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

            
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    __balances[main_account, ctx.caller] -= amount
          

            
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    __balances[main_account] -= amount
          

            
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    __balances[to] += amount
          

            
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