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from dataclasses import (
dataclass,
)
import json
import os
from typing import (
List,
)
from eth_typing import (
ChainId,
)
from eth_utils import (
ValidationError,
)
@dataclass
class Network:
chain_id: int
name: str
shortName: str
symbol: ChainId
def initialize_network_objects() -> List[Network]:
networks_obj = []
networks_json_path = os.path.abspath(
os.path.join(os.path.dirname(__file__), "__json")
)
with open(
os.path.join(networks_json_path, "eth_networks.json"),
encoding="UTF-8",
) as open_file:
network_data = json.load(open_file)
for entry in network_data:
try:
network = Network(
chain_id=entry["chainId"],
name=entry["name"],
shortName=entry["shortName"],
symbol=ChainId(entry["chainId"]),
)
networks_obj.append(network)
except ValueError:
# Chain does not have a valid ChainId, network files in eth-utils and
# eth-typing should to be updated. Run `python update_networks.py` in the
# project root.
pass
return networks_obj
networks = initialize_network_objects()
networks_by_id = {network.chain_id: network for network in networks}
network_names_by_id = {network.chain_id: network.name for network in networks}
network_short_names_by_id = {
network.chain_id: network.shortName for network in networks
}
def network_from_chain_id(chain_id: int) -> Network:
try:
return networks_by_id[chain_id]
except KeyError:
raise ValidationError(f"chain_id is not recognized: {chain_id}")
def name_from_chain_id(chain_id: int) -> str:
try:
return network_names_by_id[chain_id]
except KeyError:
raise ValidationError(f"chain_id is not recognized: {chain_id}")
def short_name_from_chain_id(chain_id: int) -> str:
try:
return network_short_names_by_id[chain_id]
except KeyError:
raise ValidationError(f"chain_id is not recognized: {chain_id}")
|
