224 lines
8.7 KiB
Python
224 lines
8.7 KiB
Python
# standard imports
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import json
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import logging
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from datetime import datetime, timedelta
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# third-party imports
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import celery
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# local imports
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from cic_ussd.conversions import from_wei
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from cic_ussd.db.models.base import SessionBase
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from cic_ussd.db.models.user import User
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from cic_ussd.account import define_account_tx_metadata
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from cic_ussd.error import ActionDataNotFoundError
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from cic_ussd.redis import InMemoryStore, cache_data, create_cached_data_key
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from cic_ussd.tasks.base import CriticalSQLAlchemyTask
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from cic_ussd.transactions import IncomingTransactionProcessor
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logg = logging.getLogger(__file__)
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celery_app = celery.current_app
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@celery_app.task(bind=True, base=CriticalSQLAlchemyTask)
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def process_account_creation_callback(self, result: str, url: str, status_code: int):
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"""This function defines a task that creates a user and
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:param result: The blockchain address for the created account
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:type result: str
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:param url: URL provided to callback task in cic-eth should http be used for callback.
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:type url: str
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:param status_code: The status of the task to create an account
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:type status_code: int
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"""
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session = SessionBase.create_session()
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cache = InMemoryStore.cache
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task_id = self.request.root_id
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# get account creation status
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account_creation_data = cache.get(task_id)
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# check status
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if account_creation_data:
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account_creation_data = json.loads(account_creation_data)
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if status_code == 0:
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# update redis data
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account_creation_data['status'] = 'CREATED'
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cache.set(name=task_id, value=json.dumps(account_creation_data))
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cache.persist(task_id)
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phone_number = account_creation_data.get('phone_number')
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# create user
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user = User(blockchain_address=result, phone_number=phone_number)
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session.add(user)
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session.commit()
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session.close()
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# expire cache
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cache.expire(task_id, timedelta(seconds=180))
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else:
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session.close()
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cache.expire(task_id, timedelta(seconds=180))
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else:
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session.close()
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raise ActionDataNotFoundError(f'Account creation task: {task_id}, returned unexpected response: {status_code}')
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@celery_app.task
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def process_incoming_transfer_callback(result: dict, param: str, status_code: int):
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session = SessionBase.create_session()
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if status_code == 0:
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# collect result data
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recipient_blockchain_address = result.get('recipient')
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sender_blockchain_address = result.get('sender')
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token_symbol = result.get('token_symbol')
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value = result.get('destination_value')
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# try to find users in system
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recipient_user = session.query(User).filter_by(blockchain_address=recipient_blockchain_address).first()
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sender_user = session.query(User).filter_by(blockchain_address=sender_blockchain_address).first()
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# check whether recipient is in the system
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if not recipient_user:
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session.close()
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raise ValueError(
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f'Tx for recipient: {recipient_blockchain_address} was received but has no matching user in the system.'
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)
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# process incoming transactions
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incoming_tx_processor = IncomingTransactionProcessor(phone_number=recipient_user.phone_number,
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preferred_language=recipient_user.preferred_language,
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token_symbol=token_symbol,
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value=value)
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if param == 'tokengift':
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incoming_tx_processor.process_token_gift_incoming_transactions()
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elif param == 'transfer':
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if sender_user:
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sender_information = define_account_tx_metadata(user=sender_user)
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incoming_tx_processor.process_transfer_incoming_transaction(
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sender_information=sender_information,
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recipient_blockchain_address=recipient_blockchain_address
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)
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else:
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logg.warning(
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f'Tx with sender: {sender_blockchain_address} was received but has no matching user in the system.'
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)
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incoming_tx_processor.process_transfer_incoming_transaction(
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sender_information='GRASSROOTS ECONOMICS',
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recipient_blockchain_address=recipient_blockchain_address
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)
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else:
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session.close()
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raise ValueError(f'Unexpected transaction param: {param}.')
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else:
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session.close()
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raise ValueError(f'Unexpected status code: {status_code}.')
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@celery_app.task
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def process_balances_callback(result: list, param: str, status_code: int):
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if status_code == 0:
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balances_data = result[0]
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blockchain_address = balances_data.get('address')
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key = create_cached_data_key(
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identifier=bytes.fromhex(blockchain_address[2:]),
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salt='cic.balances_data'
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)
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cache_data(key=key, data=json.dumps(balances_data))
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else:
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raise ValueError(f'Unexpected status code: {status_code}.')
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# TODO: clean up this handler
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def define_transaction_action_tag(
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preferred_language: str,
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sender_blockchain_address: str,
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param: str):
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# check if out going ot incoming transaction
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if sender_blockchain_address == param:
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# check preferred language
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if preferred_language == 'en':
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action_tag = 'SENT'
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direction = 'TO'
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else:
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action_tag = 'ULITUMA'
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direction = 'KWA'
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else:
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if preferred_language == 'en':
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action_tag = 'RECEIVED'
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direction = 'FROM'
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else:
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action_tag = 'ULIPOKEA'
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direction = 'KUTOKA'
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return action_tag, direction
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@celery_app.task
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def process_statement_callback(result, param: str, status_code: int):
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if status_code == 0:
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# create session
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session = SessionBase.create_session()
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processed_transactions = []
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# process transaction data to cache
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for transaction in result:
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sender_blockchain_address = transaction.get('sender')
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recipient_address = transaction.get('recipient')
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source_token = transaction.get('source_token')
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# filter out any transactions that are "gassy"
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if '0x0000000000000000000000000000000000000000' in source_token:
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pass
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else:
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# describe a processed transaction
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processed_transaction = {}
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# check if sender is in the system
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sender: User = session.query(User).filter_by(blockchain_address=sender_blockchain_address).first()
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owner: User = session.query(User).filter_by(blockchain_address=param).first()
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if sender:
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processed_transaction['sender_phone_number'] = sender.phone_number
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action_tag, direction = define_transaction_action_tag(
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preferred_language=owner.preferred_language,
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sender_blockchain_address=sender_blockchain_address,
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param=param
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)
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processed_transaction['action_tag'] = action_tag
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processed_transaction['direction'] = direction
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else:
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processed_transaction['sender_phone_number'] = 'GRASSROOTS ECONOMICS'
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# check if recipient is in the system
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recipient: User = session.query(User).filter_by(blockchain_address=recipient_address).first()
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if recipient:
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processed_transaction['recipient_phone_number'] = recipient.phone_number
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else:
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logg.warning(f'Tx with recipient not found in cic-ussd')
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# add transaction values
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processed_transaction['to_value'] = from_wei(value=transaction.get('to_value')).__str__()
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processed_transaction['from_value'] = from_wei(value=transaction.get('from_value')).__str__()
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raw_timestamp = transaction.get('timestamp')
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timestamp = datetime.utcfromtimestamp(raw_timestamp).strftime('%d/%m/%y, %H:%M')
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processed_transaction['timestamp'] = timestamp
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processed_transactions.append(processed_transaction)
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# cache account statement
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identifier = bytes.fromhex(param[2:])
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key = create_cached_data_key(identifier=identifier, salt='cic.statement')
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data = json.dumps(processed_transactions)
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# cache statement data
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cache_data(key=key, data=data)
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else:
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raise ValueError(f'Unexpected status code: {status_code}.')
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