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Add case in where verifier data is the same but column is different

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This commit is contained in:
danielsanchezq 2024-03-21 13:27:52 +01:00
parent 1d49de90fc
commit 93b2d59b96
1 changed files with 17 additions and 7 deletions
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24
da/verifier.py
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@ -1,6 +1,6 @@
from dataclasses import dataclass
from hashlib import sha3_256
from typing import List, Optional, Sequence, Set
from typing import List, Optional, Sequence, Set, Dict
from eth2spec.deneb.mainnet import BLSFieldElement
from eth2spec.eip7594.mainnet import (
@ -26,13 +26,16 @@ class DABlob:
rows_commitments: List[Commitment]
rows_proofs: List[Proof]
def id(self):
def id(self) -> bytes:
return da.common.build_attestation_message(self.aggregated_column_commitment, self.rows_commitments)
def column_id(self) -> bytes:
return sha3_256(self.column.as_bytes()).digest()
class DAVerifier:
def __init__(self, sk: BLSPrivateKey):
self.attested_blobs: Set[bytes] = set()
self.attested_blobs: Dict[bytes, (bytes, Attestation)] = dict()
self.sk = sk
@staticmethod
@ -84,8 +87,14 @@ class DAVerifier:
return Attestation(signature=bls_pop.Sign(self.sk, message))
def verify(self, blob: DABlob) -> Optional[Attestation]:
if (blob_id := blob.id()) in self.attested_blobs:
# We already attested for such blob, skip
blob_id = blob.id()
if previous_attestation := self.attested_blobs.get(blob_id):
column_id, attestation = previous_attestation
# we already attested, is cached so we return it
if column_id == blob.column_id():
return attestation
# we already attested and they are asking us to attest the same data different column
# skip
return None
is_column_verified = DAVerifier._verify_column(
blob.column,
@ -101,5 +110,6 @@ class DAVerifier:
)
if not are_chunks_verified:
return
self.attested_blobs.add(blob_id)
return self._build_attestation(blob)
attestation = self._build_attestation(blob)
self.attested_blobs[blob_id] = (blob.column_id(), attestation)
return attestation