from statistics import median
from .blockcypher import BlockcypherFeeEstimator
from .fullnode import DogecoinRPCClient
from ...errors import NetworkException
from ...nodes.doge import doge_nodes
[docs]class DogecoinFeeEstimator:
"""
A class representing a Dogecoin fee rate estimator.
Developers should use this class, because it autoselects the most stable
providers to fetch data from.
"""
def __init__(self, **kwargs):
self.provider_list = []
fullnode_endpoints = kwargs.get("fullnode_endpoints") or []
fullnode_endpoints += doge_nodes
blockcypher_tokens = kwargs.get("blockcypher_tokens")
tokens = blockcypher_tokens
if not tokens:
tokens = []
for token in tokens:
self.provider_list.append(BlockcypherFeeEstimator(api_key=token))
self.provider_list.append(BlockcypherFeeEstimator()) # No token (free) version
for endpoint in fullnode_endpoints:
self.provider_list.append(DogecoinRPCClient(**endpoint))
[docs] def get_fee_rate(self):
"""
Gets the network fee rate.
Returns:
int: The network fee rate.
Raises:
Exception: If none of the fee providers are working after the specified number of tries.
"""
fee_rates = []
for provider in self.provider_list:
try:
fee_rate = provider.get_fee_rate()
fee_rates.append(fee_rate)
except NetworkException:
continue
if not fee_rates:
return 1
# Fall back to the minimum relay fee when providers are unavailable.
return median(fee_rates)