class SmartGasPrice(GasPrice):
"""Simple and smart gas price scenario.
Uses an EthGasStation feed. Starts with fast+10GWei, adding another 10GWei each 60 seconds
up to fast+50GWei maximum. Falls back to a default scenario (incremental as well) if
the EthGasStation feed unavailable for more than 10 minutes.
"""
GWEI = 1000000000
def __init__(self):
self.gas_station = EthGasStation(refresh_interval=60, expiry=600)
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)
class SmartGasPrice(GasPrice):
"""Simple and smart gas price scenario.
Uses an EthGasStation feed. Starts with fast+10GWei, adding another 10GWei each 60 seconds
up to fast+50GWei maximum. Falls back to a default scenario (incremental as well) if
the EthGasStation feed unavailable for more than 10 minutes.
"""
GWEI = 1000000000
def __init__(self):
self.gas_station = EthGasStation(refresh_interval=60, expiry=600)
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 __init__(self):
self.gas_station = EthGasStation(refresh_interval=60, expiry=600)
def __init__(self):
self.gas_station = EthGasStation(refresh_interval=60, expiry=600)