def from_configuration_file(cls, filepath,
**overrides) -> 'NodeConfiguration':
"""Initialize a NodeConfiguration from a JSON file."""
from nucypher.config.storages import NodeStorage # TODO: move
NODE_STORAGES = {
storage_class._name: storage_class
for storage_class in NodeStorage.__subclasses__()
}
with open(filepath, 'r') as file:
payload = cls.__CONFIG_FILE_DESERIALIZER(file.read())
# Make NodeStorage
storage_payload = payload['node_storage']
storage_type = storage_payload[NodeStorage._TYPE_LABEL]
storage_class = NODE_STORAGES[storage_type]
node_storage = storage_class.from_payload(
payload=storage_payload,
character_class=cls._Character,
federated_only=payload['federated_only'],
serializer=cls.NODE_SERIALIZER,
deserializer=cls.NODE_DESERIALIZER)
payload.update(dict(node_storage=node_storage))
return cls(**{**payload, **overrides})
def load_node_storage(cls, storage_payload: dict, federated_only: bool):
from nucypher.config.storages import NodeStorage
node_storage_subclasses = {storage._name: storage for storage in NodeStorage.__subclasses__()}
storage_type = storage_payload[NodeStorage._TYPE_LABEL]
storage_class = node_storage_subclasses[storage_type]
node_storage = storage_class.from_payload(payload=storage_payload, federated_only=federated_only)
return node_storage
def from_configuration_file(cls, filepath: str = None, **overrides) -> 'NodeConfiguration':
"""Initialize a NodeConfiguration from a JSON file."""
from nucypher.config.storages import NodeStorage
node_storage_subclasses = {storage._name: storage for storage in NodeStorage.__subclasses__()}
if filepath is None:
filepath = cls.DEFAULT_CONFIG_FILE_LOCATION
# Read from disk
payload = cls._read_configuration_file(filepath=filepath)
# Initialize NodeStorage subclass from file (sub-configuration)
storage_payload = payload['node_storage']
storage_type = storage_payload[NodeStorage._TYPE_LABEL]
storage_class = node_storage_subclasses[storage_type]
node_storage = storage_class.from_payload(payload=storage_payload,
# character_class=cls._CHARACTER_CLASS, # TODO: Do not pass this here - Always Use Ursula
federated_only=payload['federated_only'],
serializer=cls.NODE_SERIALIZER,
deserializer=cls.NODE_DESERIALIZER)
# Deserialize domains to UTF-8 bytestrings
domains = list(domain.encode() for domain in payload['domains'])
payload.update(dict(node_storage=node_storage, domains=domains))
# Filter out Nones from overrides to detect, well, overrides
overrides = {k: v for k, v in overrides.items() if v is not None}
# Instantiate from merged params
node_configuration = cls(**{**payload, **overrides})
return node_configuration
def from_configuration_file(cls,
filepath: str = None,
**overrides) -> 'NodeConfiguration':
"""Initialize a NodeConfiguration from a JSON file."""
from nucypher.config.storages import NodeStorage
node_storage_subclasses = {
storage._name: storage
for storage in NodeStorage.__subclasses__()
}
if filepath is None:
filepath = cls.DEFAULT_CONFIG_FILE_LOCATION
# Read from disk
payload = cls._read_configuration_file(filepath=filepath)
# Sanity check
try:
checksum_address = payload['checksum_public_address']
except KeyError:
raise cls.ConfigurationError(
f"No checksum address specified in configuration file {filepath}"
)
else:
if not eth_utils.is_checksum_address(checksum_address):
raise cls.ConfigurationError(
f"Address: '{checksum_address}', specified in {filepath} is not a valid checksum address."
)
# Initialize NodeStorage subclass from file (sub-configuration)
storage_payload = payload['node_storage']
storage_type = storage_payload[NodeStorage._TYPE_LABEL]
storage_class = node_storage_subclasses[storage_type]
node_storage = storage_class.from_payload(
payload=storage_payload,
federated_only=payload['federated_only'],
serializer=cls.NODE_SERIALIZER,
deserializer=cls.NODE_DESERIALIZER)
# Deserialize domains to UTF-8 bytestrings
domains = set(domain.encode() for domain in payload['domains'])
payload.update(dict(node_storage=node_storage, domains=domains))
# Filter out Nones from overrides to detect, well, overrides
overrides = {k: v for k, v in overrides.items() if v is not None}
# Instantiate from merged params
node_configuration = cls(config_file_location=filepath,
**{
**payload,
**overrides
})
return node_configuration