cic-stack/apps/cic-eth/cic_eth/eth/factory.py

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# standard imports
import logging
# local imports
from cic_registry import CICRegistry
from cic_eth.eth.nonce import NonceOracle
from cic_eth.eth import RpcClient
logg = logging.getLogger(__name__)
class TxFactory:
"""Base class for transaction factory classes.
:param from_address: Signer address to create transaction on behalf of
:type from_address: str, 0x-hex
:param rpc_client: RPC connection object to use to acquire account nonce if no record in nonce cache
:type rpc_client: cic_eth.eth.rpc.RpcClient
"""
gas_price = 100
"""Gas price, updated between batches"""
def __init__(self, from_address, rpc_client):
self.address = from_address
self.default_nonce = rpc_client.w3.eth.getTransactionCount(from_address, 'pending')
self.nonce_oracle = NonceOracle(from_address, self.default_nonce)
TxFactory.gas_price = rpc_client.gas_price()
logg.debug('txfactory instance address {} gas price'.format(self.address, self.gas_price))
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def next_nonce(self, session=None):
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"""Returns the current cached nonce value, and increments it for next transaction.
:returns: Nonce
:rtype: number
"""
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return self.nonce_oracle.next(session=session)