def create_policy(self,
bob: "Bob",
label: bytes,
m: int,
n: int,
federated=False):
"""
Create a Policy to share uri with bob.
Generates KFrags and attaches them.
"""
public_key, kfrags = self.generate_kfrags(bob, label, m, n)
payload = dict(label=label,
bob=bob,
kfrags=kfrags,
public_key=public_key,
m=m)
if self.federated_only is True or federated is True:
from nucypher.policy.models import FederatedPolicy
# We can't sample; we can only use known nodes.
known_nodes = self.known_nodes.shuffled()
policy = FederatedPolicy(alice=self,
ursulas=known_nodes,
**payload)
else:
from nucypher.blockchain.eth.policies import BlockchainPolicy
policy = BlockchainPolicy(author=self, **payload)
return policy
def create_policy(self, *args, **kwargs):
"""
Hence the name, a PolicyAuthor can create
a BlockchainPolicy with themself as the author.
:return: Returns a newly authored BlockchainPolicy with n proposed arrangements.
"""
from nucypher.blockchain.eth.policies import BlockchainPolicy
blockchain_policy = BlockchainPolicy(alice=self, *args, **kwargs)
return blockchain_policy
def create_policy(self,
bob: "Bob",
label: bytes,
m: int,
n: int,
federated: bool = False,
expiration: maya.MayaDT = None,
value: int = None,
handpicked_ursulas: set = None):
"""
Create a Policy to share uri with bob.
Generates KFrags and attaches them.
"""
# Validate early
if not federated and not (expiration and value):
raise ValueError("expiration and value are required arguments when creating a blockchain policy")
# Generate KFrags
public_key, kfrags = self.generate_kfrags(bob, label, m, n)
# Federated Payload
payload = dict(label=label,
bob=bob,
kfrags=kfrags,
public_key=public_key,
m=m)
if self.federated_only is True or federated is True:
# Use known nodes.
from nucypher.policy.models import FederatedPolicy
known_nodes = self.known_nodes.shuffled()
policy = FederatedPolicy(alice=self, ursulas=known_nodes, **payload)
else:
# Sample from blockchain via PolicyManager
blockchain_payload = dict(expiration=expiration,
value=value,
handpicked_ursulas=handpicked_ursulas)
payload.update(blockchain_payload)
from nucypher.blockchain.eth.policies import BlockchainPolicy
policy = BlockchainPolicy(alice=self, **payload)
return policy