def gas_price(self):
""" IncreasingGasPrice """
GWEI = 1000000000
return IncreasingGasPrice(initial_price=5*GWEI,
increase_by=10*GWEI,
every_secs=60,
max_price=300*GWEI)
def get_gas_price(self, time_elapsed: int) -> Optional[int]:
assert(isinstance(time_elapsed, int))
config = self.reloadable_config.get_config()
gas_price = config.get('gasPrice', None)
gas_price_increase = config.get('gasPriceIncrease', None)
gas_price_increase_every = config.get('gasPriceIncreaseEvery', None)
gas_price_max = config.get('gasPriceMax', None)
if gas_price is not None:
if gas_price_increase and gas_price_increase_every:
strategy = IncreasingGasPrice(gas_price, gas_price_increase, gas_price_increase_every, gas_price_max)
else:
strategy = FixedGasPrice(gas_price)
else:
strategy = DefaultGasPrice()
return strategy.get_gas_price(time_elapsed=time_elapsed)
def get_gas_price(self, time_elapsed: int) -> Optional[int]:
fast_price = self.gas_station.fast_price()
if fast_price is not None:
# start from fast_price + 10 GWei
# increase by 10 GWei every 60 seconds
# max is fast_price + 50 GWei
return min(int(fast_price*1.1) + int(time_elapsed/60)*(10*self.GWEI), int(fast_price*1.1)+(50*self.GWEI))
else:
# default gas pricing when EthGasStation feed is down
return IncreasingGasPrice(initial_price=50*self.GWEI,
increase_by=10*self.GWEI,
every_secs=60,
max_price=100*self.GWEI).get_gas_price(time_elapsed)
def create_gas_price(arguments) -> GasPrice:
if arguments.smart_gas_price:
return SmartGasPrice()
elif arguments.gas_price_file:
return GasPriceFile(arguments.gas_price_file)
elif arguments.gas_price:
if arguments.gas_price_increase is not None:
return IncreasingGasPrice(initial_price=arguments.gas_price,
increase_by=arguments.gas_price_increase,
every_secs=arguments.gas_price_increase_every,
max_price=arguments.gas_price_max)
else:
return FixedGasPrice(arguments.gas_price)
else:
return DefaultGasPrice()
def test_gas_price_should_obey_max_value(self):
# given
increasing_gas_price = IncreasingGasPrice(1000, 100, 60, 2500)
# expect
assert increasing_gas_price.get_gas_price(0) == 1000
assert increasing_gas_price.get_gas_price(1) == 1000
assert increasing_gas_price.get_gas_price(59) == 1000
assert increasing_gas_price.get_gas_price(60) == 1100
assert increasing_gas_price.get_gas_price(119) == 1100
assert increasing_gas_price.get_gas_price(120) == 1200
assert increasing_gas_price.get_gas_price(1200) == 2500
assert increasing_gas_price.get_gas_price(3000) == 2500
assert increasing_gas_price.get_gas_price(1000000) == 2500
def test_gas_price_should_increase_with_time(self):
# given
increasing_gas_price = IncreasingGasPrice(1000, 100, 60, None)
# expect
assert increasing_gas_price.get_gas_price(0) == 1000
assert increasing_gas_price.get_gas_price(1) == 1000
assert increasing_gas_price.get_gas_price(59) == 1000
assert increasing_gas_price.get_gas_price(60) == 1100
assert increasing_gas_price.get_gas_price(119) == 1100
assert increasing_gas_price.get_gas_price(120) == 1200
assert increasing_gas_price.get_gas_price(1200) == 3000
def test_should_require_positive_max_price_if_provided(self):
with pytest.raises(Exception):
IncreasingGasPrice(1000, 1000, 60, 0)
with pytest.raises(Exception):
IncreasingGasPrice(1000, 1000, 60, -1)
def test_should_require_positive_every_secs_value(self):
with pytest.raises(Exception):
IncreasingGasPrice(1000, 100, 0, None)
with pytest.raises(Exception):
IncreasingGasPrice(1000, 100, -1, None)
def test_should_require_positive_increase_by_value(self):
with pytest.raises(Exception):
IncreasingGasPrice(1000, 0, 60, None)
with pytest.raises(Exception):
IncreasingGasPrice(1000, -1, 60, None)
def test_should_require_positive_initial_price(self):
with pytest.raises(Exception):
IncreasingGasPrice(0, 1000, 60, None)
with pytest.raises(Exception):
IncreasingGasPrice(-1, 1000, 60, None)
def default_gas_pricing(self, time_elapsed: int):
return IncreasingGasPrice(initial_price=5 * self.GWEI,
increase_by=10 * self.GWEI,
every_secs=60,
max_price=100 *
self.GWEI).get_gas_price(time_elapsed)