def refill(card,amount): ''' Refills card with journey contract inside reader field. `card` argument should be valid card in active state with transport_card.validate performed on it. `amount` - summ in cents to be added to transport purse, converted to journeys and subsequently removed from transport purse. ''' sector = card.sector(num=SECTOR,key=KEY,enc=ENCRYPTION) contract = CONTRACT_A.validate(sector,CONTRACT1_STATIC,CONTRACT1_DYNAMIC) purse_value = purse.change_value(card,amount) if purse_value < JOURNEY_COST: return 0 amount_used = contract.dynamic.refill(purse_value) purse.change_value(card,-amount_used) event = EVENT_CONTRACT_ADD2(card) event.AID,event.PIX = AID,PIX event.Value = contract.dynamic.journeys event.TransactionValue = amount_used / JOURNEY_COST event.Amount = amount_used event.LocalTransactions = contract.dynamic.transaction try: card.auth(sector) contract.commit(low_endian = 1) sector.write(blocks=(1,2)) except Exception as e: event.set_error_code(e); raise finally: event.save(card) return amount_used
def refill(card,amount): cost,(begin,end) = available_refill(*card.contract()) if purse.change_value(card,amount) < cost: return 0 purse.change_value(card,-cost) events = [] static_sector,static_data = read_static(card) dyn_sector,dyn_proxy,dyn_data = read_dynamic(card) if not static_data.active(): sell_event = EVENT_CONTRACT(card, Value = cost) sell_event.LocalTransactions = dyn_data.update() events.append(sell_event) static_data.refill(begin,end) term_pack = ((end.year - 2000) << 8) + end.month refill_event = EVENT_CONTRACT_ADD2(card,TransactionValue=term_pack,Amount=cost) refill_event.LocalTransactions = dyn_data.update() events.append(refill_event) try: dyn_proxy.commit(dyn_data,low_endian = 1) dyn_sector.write() card.auth(static_sector) static_sector.data.crc16_calc(low_endian = 1) static_sector.write() except Exception as e: [event.set_error_code(e) for event in events]; raise finally: [event.save(card) for event in events] return cost
