class SmartGasPrice(GasPrice):
"""
DEPRACATED. This class is maintained for legacy support. All new development should utilize DynamicGasPrice below
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.
"""
def __init__(self, api_key: None):
self.gas_station = EthGasStation(refresh_interval=60,
expiry=600,
api_key=api_key)
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=20 * self.GWEI,
increase_by=10 * self.GWEI,
every_secs=60,
max_price=100 *
self.GWEI).get_gas_price(time_elapsed)
def test_ethgasstation_integration():
logging.basicConfig(format='%(asctime)-15s %(levelname)-8s %(message)s', level=logging.DEBUG)
logging.getLogger('urllib3.connectionpool').setLevel(logging.INFO)
logging.getLogger('requests.packages.urllib3.connectionpool').setLevel(logging.INFO)
egs = EthGasStation(10, 600)
while True:
safe_low_price = egs.safe_low_price()
logging.info(safe_low_price)
standard_price = egs.standard_price()
logging.info(standard_price)
fast_price = egs.fast_price()
logging.info(fast_price)
if safe_low_price is not None and standard_price is not None and fast_price is not None:
break
time.sleep(1)