2021-02-01 18:12:51 +01:00
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# standard imports
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import logging
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# local imports
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from cic_eth.db.models.role import AccountRole
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from cic_eth.db.models.base import SessionBase
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logg = logging.getLogger()
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class GasOracle():
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"""Provides gas pricing for transactions.
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:param w3: Web3 object
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:type w3: web3.Web3
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"""
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__safe_threshold_amount_value = 2000000000 * 60000 * 3
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__refill_amount_value = __safe_threshold_amount_value * 5
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default_gas_limit = 21000
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def __init__(self, w3):
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self.w3 = w3
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self.gas_price_current = w3.eth.gas_price()
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def safe_threshold_amount(self):
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"""The gas balance threshold under which a new gas refill transaction should be initiated.
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:returns: Gas token amount
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:rtype: number
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"""
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g = GasOracle.__safe_threshold_amount_value
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logg.warning('gas safe threshold is currently hardcoded to {}'.format(g))
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return g
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def refill_amount(self):
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"""The amount of gas tokens to send in a gas refill transaction.
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:returns: Gas token amount
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:rtype: number
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"""
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g = GasOracle.__refill_amount_value
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logg.warning('gas refill amount is currently hardcoded to {}'.format(g))
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return g
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def gas_provider(self):
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"""Gas provider address.
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:returns: Etheerum account address
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:rtype: str, 0x-hex
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"""
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2021-02-21 16:41:37 +01:00
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session = SessionBase.create_session()
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a = AccountRole.get_address('GAS_GIFTER', session)
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2021-03-07 19:01:44 +01:00
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logg.debug('gasgifter {}'.format(a))
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2021-02-21 16:41:37 +01:00
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session.close()
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return a
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2021-02-01 18:12:51 +01:00
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def gas_price(self, category='safe'):
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"""Get projected gas price to use for a transaction at the current moment.
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When the category parameter is implemented, it can be used to control the priority of a transaction in the network.
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:param category: Bid level category to return price for. Currently has no effect.
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:type category: str
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:returns: Gas price
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:rtype: number
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"""
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#logg.warning('gas price hardcoded to category "safe"')
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#g = 100
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#return g
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return self.gas_price_current
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