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

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2021-02-01 18:12:51 +01:00
# standard imports
import logging
# external imports
import celery
from chainlib.eth.gas import price
from hexathon import strip_0x
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# local imports
from cic_eth.db.models.role import AccountRole
from cic_eth.db.models.base import SessionBase
logg = logging.getLogger()
#
#class GasOracle():
# """Provides gas pricing for transactions.
#
# :param w3: Web3 object
# :type w3: web3.Web3
# """
#
# __safe_threshold_amount_value = 2000000000 * 60000 * 3
# __refill_amount_value = __safe_threshold_amount_value * 5
# default_gas_limit = 21000
#
# def __init__(self, conn):
# o = price()
# r = conn.do(o)
# b = bytes.from_hex(strip_0x(r))
# self.gas_price_current = int.from_bytes(b, 'big')
#
# #self.w3 = w3
# #self.gas_price_current = w3.eth.gas_price()
#
#
# def safe_threshold_amount(self):
# """The gas balance threshold under which a new gas refill transaction should be initiated.
#
# :returns: Gas token amount
# :rtype: number
# """
# g = GasOracle.__safe_threshold_amount_value
# logg.warning('gas safe threshold is currently hardcoded to {}'.format(g))
# return g
#
#
# def refill_amount(self):
# """The amount of gas tokens to send in a gas refill transaction.
#
# :returns: Gas token amount
# :rtype: number
# """
# g = GasOracle.__refill_amount_value
# logg.warning('gas refill amount is currently hardcoded to {}'.format(g))
# return g
#
#
# def gas_provider(self):
# """Gas provider address.
#
# :returns: Etheerum account address
# :rtype: str, 0x-hex
# """
# session = SessionBase.create_session()
# a = AccountRole.get_address('GAS_GIFTER', session)
# logg.debug('gasgifter {}'.format(a))
# session.close()
# return a
#
#
# def gas_price(self, category='safe'):
# """Get projected gas price to use for a transaction at the current moment.
#
# When the category parameter is implemented, it can be used to control the priority of a transaction in the network.
#
# :param category: Bid level category to return price for. Currently has no effect.
# :type category: str
# :returns: Gas price
# :rtype: number
# """
# #logg.warning('gas price hardcoded to category "safe"')
# #g = 100
# #return g
# return self.gas_price_current
class MaxGasOracle:
def gas(code=None):
return 8000000
def create_check_gas_task(tx_signed_raws_hex, chain_spec, holder_address, gas=None, tx_hashes_hex=None, queue=None):
"""Creates a celery task signature for a check_gas task that adds the task to the outgoing queue to be processed by the dispatcher.
If tx_hashes_hex is not spefified, a preceding task chained to check_gas must supply the transaction hashes as its return value.
:param tx_signed_raws_hex: Raw signed transaction data
:type tx_signed_raws_hex: list of str, 0x-hex
:param chain_spec: Chain spec of address to add check gas for
:type chain_spec: chainlib.chain.ChainSpec
:param holder_address: Address sending the transactions
:type holder_address: str, 0x-hex
:param gas: Gas budget hint for transactions
:type gas: int
:param tx_hashes_hex: Transaction hashes
:type tx_hashes_hex: list of str, 0x-hex
:param queue: Task queue
:type queue: str
:returns: Signature of task chain
:rtype: celery.Signature
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"""
s_check_gas = None
if tx_hashes_hex != None:
s_check_gas = celery.signature(
'cic_eth.eth.tx.check_gas',
[
tx_hashes_hex,
chain_spec.asdict(),
tx_signed_raws_hex,
holder_address,
gas,
],
queue=queue,
)
else:
s_check_gas = celery.signature(
'cic_eth.eth.tx.check_gas',
[
chain_spec.asdict(),
tx_signed_raws_hex,
holder_address,
gas,
],
queue=queue,
)
return s_check_gas