75 lines
3.1 KiB
Python
75 lines
3.1 KiB
Python
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from hashlib import sha3_256
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from unittest import TestCase
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from da.encoder import DAEncoderParams, DAEncoder
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from da.test_encoder import TestEncoder
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from da.verifier import DAVerifier, DABlob
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from da.common import NodeId, Attestation, Bitfield, NomosDaG2ProofOfPossession as bls_pop
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from da.dispersal import Dispersal, EncodedData, DispersalSettings
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class TestDispersal(TestCase):
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def setUp(self):
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self.n_nodes = 16
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self.nodes_ids = [NodeId(x.to_bytes(length=32, byteorder='big')) for x in range(self.n_nodes)]
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self.secret_keys = list(range(1, self.n_nodes+1))
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self.public_keys = [bls_pop.SkToPk(sk) for sk in self.secret_keys]
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# sort by pk as we do in dispersal
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self.secret_keys, self.public_keys = zip(
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*sorted(zip(self.secret_keys, self.public_keys), key=lambda x: x[1])
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)
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dispersal_settings = DispersalSettings(
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self.nodes_ids,
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self.public_keys,
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self.n_nodes // 2 + 1
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)
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self.dispersal = Dispersal(dispersal_settings)
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self.encoder_test = TestEncoder()
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self.encoder_test.setUp()
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def test_build_certificate_insufficient_attestations(self):
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with self.assertRaises(AssertionError):
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self.dispersal._build_certificate(None, [], [])
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def test_build_certificate_enough_attestations(self):
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mock_encoded_data = EncodedData(
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None, None, None, [], [], [], bytes(b"f"*48), []
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)
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mock_message = sha3_256(mock_encoded_data.aggregated_column_commitment).digest()
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mock_attestations = [Attestation(bls_pop.Sign(sk, mock_message)) for sk in self.secret_keys]
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certificate = self.dispersal._build_certificate(
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mock_encoded_data,
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mock_attestations,
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Bitfield([True for _ in range(len(self.secret_keys))])
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)
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self.assertIsNotNone(certificate)
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self.assertEqual(certificate.aggregated_column_commitment, mock_encoded_data.aggregated_column_commitment)
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self.assertEqual(certificate.row_commitments, [])
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self.assertIsNotNone(certificate.aggregated_signatures)
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self.assertTrue(
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certificate.verify(self.public_keys)
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)
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def test_disperse(self):
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data = self.encoder_test.data
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encoding_params = DAEncoderParams(column_count=self.n_nodes // 2, bytes_per_chunk=31)
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encoded_data = DAEncoder(encoding_params).encode(data)
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# mock send and await method with local verifiers
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def __send_and_await_response(node: NodeId, blob: DABlob):
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sk = self.secret_keys[int.from_bytes(node)]
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verifier = DAVerifier(sk, self.public_keys)
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return verifier.verify(blob)
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# inject mock send and await method
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self.dispersal._send_and_await_response = __send_and_await_response
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certificate = self.dispersal.disperse(encoded_data)
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self.assertIsNotNone(certificate)
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self.assertTrue(certificate.verify(self.public_keys)
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)
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self.assertEqual(
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certificate.signers,
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[True if i < self.dispersal.settings.threshold else False for i in range(self.n_nodes)]
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)
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