2021-02-01 18:12:51 +01:00
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# standard imports
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import datetime
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import logging
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# third-party imports
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from sqlalchemy import Column, String, Integer, DateTime, ForeignKey
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from cic_registry import zero_address
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# local imports
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from cic_eth.db.models.base import SessionBase
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from cic_eth.db.models.tx import TxCache
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from cic_eth.db.models.otx import Otx
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logg = logging.getLogger()
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class Lock(SessionBase):
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"""Deactivate functionality on a global or per-account basis
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"""
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__tablename__ = "lock"
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blockchain = Column(String)
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address = Column(String, ForeignKey('tx_cache.sender'))
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flags = Column(Integer)
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date_created = Column(DateTime, default=datetime.datetime.utcnow)
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otx_id = Column(Integer, ForeignKey('otx.id'))
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def chain(self):
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"""Get chain the cached instance represents.
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"""
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return self.blockchain
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@staticmethod
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def set(chain_str, flags, address=zero_address, session=None, tx_hash=None):
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"""Sets flags associated with the given address and chain.
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If a flags entry does not exist it is created.
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Does not validate the address against any other tables or components.
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Valid flags can be found in cic_eth.db.enum.LockEnum.
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:param chain_str: Chain spec string representation
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:type str: str
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:param flags: Flags to set
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:type flags: number
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:param address: Ethereum address
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:type address: str, 0x-hex
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:param session: Database session, if None a separate session will be used.
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:type session: SQLAlchemy session
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:returns: New flag state of entry
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:rtype: number
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"""
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2021-03-01 20:35:05 +01:00
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session = SessionBase.bind_session(session)
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2021-02-01 18:12:51 +01:00
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2021-03-01 20:35:05 +01:00
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q = session.query(Lock)
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2021-02-01 18:12:51 +01:00
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#q = q.join(TxCache, isouter=True)
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q = q.filter(Lock.address==address)
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q = q.filter(Lock.blockchain==chain_str)
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lock = q.first()
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if lock == None:
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lock = Lock()
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lock.flags = 0
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lock.address = address
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lock.blockchain = chain_str
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if tx_hash != None:
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2021-03-01 20:35:05 +01:00
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session.flush()
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q = session.query(Otx)
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2021-02-01 18:12:51 +01:00
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q = q.filter(Otx.tx_hash==tx_hash)
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otx = q.first()
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if otx != None:
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lock.otx_id = otx.id
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lock.flags |= flags
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r = lock.flags
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2021-03-01 20:35:05 +01:00
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session.add(lock)
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session.commit()
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SessionBase.release_session(session)
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2021-02-01 18:12:51 +01:00
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return r
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@staticmethod
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def reset(chain_str, flags, address=zero_address, session=None):
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"""Resets flags associated with the given address and chain.
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If the resulting flags entry value is 0, the entry will be deleted.
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Does not validate the address against any other tables or components.
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Valid flags can be found in cic_eth.db.enum.LockEnum.
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:param chain_str: Chain spec string representation
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:type str: str
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:param flags: Flags to set
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:type flags: number
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:param address: Ethereum address
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:type address: str, 0x-hex
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:param session: Database session, if None a separate session will be used.
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:type session: SQLAlchemy session
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:returns: New flag state of entry
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:rtype: number
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"""
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2021-03-01 20:35:05 +01:00
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session = SessionBase.bind_session(session)
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2021-02-01 18:12:51 +01:00
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2021-03-01 20:35:05 +01:00
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q = session.query(Lock)
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2021-02-01 18:12:51 +01:00
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#q = q.join(TxCache, isouter=True)
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q = q.filter(Lock.address==address)
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q = q.filter(Lock.blockchain==chain_str)
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lock = q.first()
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r = 0
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if lock != None:
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lock.flags &= ~flags
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if lock.flags == 0:
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2021-03-01 20:35:05 +01:00
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session.delete(lock)
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2021-02-01 18:12:51 +01:00
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else:
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session.add(lock)
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2021-02-01 18:12:51 +01:00
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r = lock.flags
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2021-03-01 20:35:05 +01:00
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session.commit()
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2021-02-01 18:12:51 +01:00
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2021-03-01 20:35:05 +01:00
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SessionBase.release_session(session)
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2021-02-01 18:12:51 +01:00
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return r
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@staticmethod
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def check(chain_str, flags, address=zero_address, session=None):
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"""Checks whether all given flags are set for given address and chain.
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Does not validate the address against any other tables or components.
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Valid flags can be found in cic_eth.db.enum.LockEnum.
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:param chain_str: Chain spec string representation
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:type str: str
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:param flags: Flags to set
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:type flags: number
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:param address: Ethereum address
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:type address: str, 0x-hex
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:param session: Database session, if None a separate session will be used.
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:type session: SQLAlchemy session
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:returns: Returns the value of all flags matched
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:rtype: number
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"""
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2021-03-01 20:35:05 +01:00
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session = SessionBase.bind_session(session)
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2021-02-01 18:12:51 +01:00
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2021-03-01 20:35:05 +01:00
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q = session.query(Lock)
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2021-02-01 18:12:51 +01:00
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#q = q.join(TxCache, isouter=True)
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q = q.filter(Lock.address==address)
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q = q.filter(Lock.blockchain==chain_str)
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q = q.filter(Lock.flags.op('&')(flags)==flags)
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lock = q.first()
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r = 0
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if lock != None:
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r = lock.flags & flags
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2021-03-01 20:35:05 +01:00
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SessionBase.release_session(session)
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2021-02-01 18:12:51 +01:00
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return r
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@staticmethod
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def check_aggregate(chain_str, flags, address, session=None):
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localsession = session
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if localsession == None:
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localsession = SessionBase.create_session()
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r = Lock.check(chain_str, flags, session=localsession)
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r |= Lock.check(chain_str, flags, address=address, session=localsession)
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if session == None:
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localsession.close()
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return r
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