mirror of https://github.com/nucypher/nucypher.git
70 lines
2.5 KiB
Python
70 lines
2.5 KiB
Python
import datetime
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import maya
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import pytest
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from apistar.test import TestClient
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from nucypher.characters import Ursula
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from nucypher.crypto.api import keccak_digest
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from nucypher.crypto.powers import SigningPower, EncryptingPower, CryptoPower
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from tests.utilities import _ALL_URSULAS
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from umbral.fragments import KFrag
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class MockPolicyCreation:
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"""
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Simple mock logic to avoid repeated hammering of blockchain policies.
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"""
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waited_for_receipt = False
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tx_hash = "THIS HAS BEEN A TRANSACTION!"
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def __init__(self, *args, **kwargs):
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# TODO: Test that proper arguments are passed here once 316 is closed.
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pass
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def transact(self, payload):
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# TODO: Make a meaningful assertion regarding the value.
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assert payload['from'] == alice._ether_address
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return self.tx_hash
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@classmethod
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def wait_for_receipt(cls, tx_hash):
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assert tx_hash == cls.tx_hash
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cls.waited_for_receipt = True
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def test_grant(alice, bob, three_agents):
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# Monkey patch KFrag repr for better debugging.
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KFrag.__repr__ = lambda kfrag: "KFrag: {}".format(bytes(kfrag)[:10].hex())
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policy_end_datetime = maya.now() + datetime.timedelta(days=5)
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n = 3
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label = b"this_is_the_path_to_which_access_is_being_granted"
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_token_agent, _miner_agent, policy_agent = three_agents
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policy_agent.blockchain.wait_for_receipt = MockPolicyCreation.wait_for_receipt
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policy_agent.contract.functions.createPolicy = MockPolicyCreation
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policy = alice.grant(bob, label, m=2, n=n,
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expiration=policy_end_datetime,
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)
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# The number of accepted arrangements at least the number of Ursulas we're using (n)
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assert len(policy._accepted_arrangements) >= n
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# The number of actually enacted arrangements is exactly equal to n.
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assert len(policy._enacted_arrangements) == n
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# Let's look at the enacted arrangements.
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for kfrag in policy.kfrags:
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arrangement = policy._enacted_arrangements[kfrag]
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ursula = _ALL_URSULAS[arrangement.ursula.rest_interface.port]
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# Get the Arrangement from Ursula's datastore, looking up by hrac.
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# This will be changed in 180, when we use the Arrangement ID.
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proper_hrac = keccak_digest(bytes(alice.stamp) + bytes(bob.stamp) + label)
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retrieved_policy = ursula.datastore.get_policy_arrangement(arrangement.id.hex().encode())
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retrieved_kfrag = KFrag.from_bytes(retrieved_policy.k_frag)
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assert kfrag == retrieved_kfrag
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