Contract con_otc002

  

    

      

        

            
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random.seed()
          

            
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I = importlib
          

            
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fee = Variable()
          

            
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data = Hash()
          

            
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owners = Variable()
          

            
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owner_perc = Hash()
          

            
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payout = Hash(default_value=0)
          

            
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@construct
          

            
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def init():
          

            
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    owners.set(['ae7d14d6d9b8443f881ba6244727b69b681010e782d4fe482dbfb0b6aca02d5d', ctx.caller])
          

            
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    owner_perc['endo'] = decimal('0.5')
          

            
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    owner_perc['marvin'] = decimal('0.5')
          

            
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    fee.set(decimal('0.8'))    
          

            
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@export
          

            
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def make_offer(offer_token: str, offer_amount: float, take_token: str,
          

            
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    take_amount: float):
          

            
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    assert offer_amount > 0, 'Negative offer_amount not allowed'
          

            
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    assert take_amount > 0, 'Negative take_amount not allowed'
          

            
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    offer_id = hashlib.sha256(str(now) + str(random.randrange(99)))
          

            
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    assert not data[offer_id], 'Generated ID not unique. Try again'
          

            
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    maker_fee = offer_amount / 100 * fee.get()
          

            
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    I.import_module(offer_token).transfer_from(amount=offer_amount +
          

            
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        maker_fee, to=ctx.this, main_account=ctx.caller)
          

            
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    data[offer_id] = {'maker': ctx.caller, 'taker': None, 'offer_token':
          

            
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        offer_token, 'offer_amount': offer_amount, 'take_token': take_token,
          

            
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        'take_amount': take_amount, 'fee': fee.get(), 'state': 'OPEN'}
          

            
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    return offer_id
          

            
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@export
          

            
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def take_offer(offer_id: str):
          

            
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    assert data[offer_id], 'Offer ID does not exist'
          

            
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    offer = data[offer_id]
          

            
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    assert offer['state'] == 'OPEN', 'Offer not available'
          

            
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    maker_fee = offer['offer_amount'] / 100 * offer['fee']
          

            
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    taker_fee = offer['take_amount'] / 100 * offer['fee']
          

            
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    #transfer take_token amount + taker_fee to this contract from taker
          

            
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    I.import_module(offer['take_token']).transfer_from(amount=offer[
          

            
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        'take_amount'] + taker_fee, to=ctx.this, main_account=ctx.caller)
          

            
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    #transfer take_token amount to maker
          

            
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    I.import_module(offer['take_token']).transfer(amount=offer[
          

            
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        'take_amount'], to=offer['maker'])
          

            
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    #transfer offer_token amount to taker
          

            
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    I.import_module(offer['offer_token']).transfer(amount=offer[
          

            
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        'offer_amount'], to=ctx.caller)
          

            
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    payout[offer['offer_token']] += maker_fee
          

            
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    payout[offer['take_token']] += taker_fee
          

            
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    offer['state'] = 'EXECUTED'
          

            
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    offer['taker'] = ctx.caller
          

            
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    data[offer_id] = offer
          

            
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@export
          

            
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def cancel_offer(offer_id: str):
          

            
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    assert data[offer_id], 'Offer ID does not exist'
          

            
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    offer = data[offer_id]
          

            
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    assert offer['state'] == 'OPEN', 'Offer can not be canceled'
          

            
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    assert offer['maker'] == ctx.caller, 'Only maker can cancel offer'
          

            
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    maker_fee = offer['offer_amount'] / 100 * offer['fee']
          

            
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    I.import_module(offer['offer_token']).transfer(amount=offer[
          

            
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        'offer_amount'] + maker_fee, to=ctx.caller)
          

            
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    offer['state'] = 'CANCELED'
          

            
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    data[offer_id] = offer
          

            
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@export
          

            
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def adjust_fee(trading_fee: str):
          

            
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    assert_owner()
          

            
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    assert trading_fee >= 0 and trading_fee <= 10, 'Wrong fee value'
          

            
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    fee.set(trading_fee)
          

            
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@export
          

            
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def payout_owners(token_list: list):
          

            
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    assert_owner()
          

            
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    for token in token_list:
          

            
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        if payout[token] > 0: 
          

            
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            token_balances = ForeignHash(foreign_contract=token, foreign_name='balances')
          

            
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            otc_balance_1 = token_balances[ctx.this]
          

            
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            for owner in owners.get():
          

            
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                payout_amount = owner_perc[owner] * payout[token]  
          

            
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                I.import_module(token).transfer(amount=payout_amount, to=owner)
          

            
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            otc_balance_2 = token_balances[ctx.this]
          

            
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            pay_out_sum = otc_balance_1 - otc_balance_2
          

            
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            payout[token] -= pay_out_sum   
          

            
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def assert_owner():
          

            
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    assert ctx.caller in owners.get(), 'Only owner can call this method!'
          
      
    
  
  

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