cic-stack/apps/cic-eth/cic_eth/eth/nonce.py
2021-03-06 17:55:51 +00:00

32 lines
906 B
Python

# local imports
from cic_eth.db.models.nonce import (
Nonce,
NonceReservation,
)
class NonceOracle():
"""Ensures atomic nonce increments for all transactions across all tasks and threads.
:param address: Address to generate nonces for
:type address: str, 0x-hex
:param default_nonce: Initial nonce value to use if no nonce cache entry already exists
:type default_nonce: number
"""
def __init__(self, address, default_nonce):
self.address = address
self.default_nonce = default_nonce
def next(self):
"""Get next unique nonce.
:returns: Nonce
:rtype: number
"""
raise AttributeError('this should not be called')
return Nonce.next(self.address, self.default_nonce)
def next_by_task_uuid(self, uuid, session=None):
return NonceReservation.release(uuid, session=session)