Created
August 28, 2015 05:10
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Small library to receive advcash.com SCI payments on your website.
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| class AdvcashProcessor(object): | |
| '''Advcash SCI processing class - accept payments, check checksums and more | |
| Developer documentation: | |
| http://advcash.com/files/documents/sci_russian_2.pdf | |
| Usage: | |
| processor = MyWebsiteAdvcashProcessor(request_data, logger=transactions_logger) | |
| verification_success = processor.validate() | |
| if verification_success: | |
| if processor.enroll(): | |
| # havent found required responses, looks like even 5xx is fine for them and don't affect transaction status on remote end | |
| return HttpResponse('ok') | |
| else: | |
| return HttpResponse('failed') | |
| else: | |
| transactions_logger.error('Wow. Wrong data from advcash. Such suspicious. Much strange. Wow.') | |
| return HttpResponse('verification failed') | |
| ''' | |
| def __init__(self, request_data, logger): | |
| self._request_data = {} | |
| for key in request_data.keys(): | |
| self._request_data[key] = request_data.get(key) | |
| self.logger = logger | |
| self._validated = False | |
| return | |
| def validate(self): | |
| 'return True if calculated hash sighature equal to provided in request' | |
| their_hash = self._request_data.get('ac_hash') | |
| if not their_hash: | |
| return False | |
| self._request_data['ADVCASH_SCI_PASSWORD'] = settings.ADVCASH_SCI_PASSWORD | |
| signature_string = ( | |
| '{ac_transfer}:{ac_start_date}:{ac_sci_name}:{ac_src_wallet}:{ac_dest_wallet' | |
| '}:{ac_order_id}:{ac_amount}:{ac_merchant_currency}:{ADVCASH_SCI_PASSWORD}' | |
| ).format(**self._request_data) | |
| my_hash = hashlib.sha256(signature_string.encode('utf-8')).hexdigest() | |
| self.__verification_result = my_hash == their_hash | |
| return self.__verification_result | |
| def enroll(self): | |
| if not self.__verification_result: | |
| raise Exception("Trying to enroll while verifications is failed or ommited!") | |
| return self._do_enroll() | |
| @transaction.atomic | |
| def _do_enroll(self): | |
| # here you can do whatever you want with self._request_data, it's validated. | |
| # don't forget to check amounts (income, client outcome with tax, etc) and currency, | |
| # about possibility of duplicated requests with same data | |
| raise NotImplementedError('Please subclass AdvcashProcessor and implement _do_enroll') |
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