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Add proofs to validate_blobs_and_kzg_commitments

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Dankrad Feist 2023-03-11 23:02:35 +00:00
parent 5e74c51411
commit 29b5309f7d
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2 changed files with 40 additions and 8 deletions
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9
specs/deneb/validator.md
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@ -44,7 +44,7 @@ Note: This API is *unstable*. `get_blobs_and_kzg_commitments` and `get_payload`
Implementers may also retrieve blobs individually per transaction.
```python
def get_blobs_and_kzg_commitments(payload_id: PayloadId) -> Tuple[Sequence[BLSFieldElement], Sequence[KZGCommitment]]:
def get_blobs_and_kzg_commitments(payload_id: PayloadId) -> Tuple[Sequence[BLSFieldElement], Sequence[KZGCommitment], Sequence[KZGProof]]:
# pylint: disable=unused-argument
...
```
@ -66,13 +66,14 @@ use the `payload_id` to retrieve `blobs` and `blob_kzg_commitments` via `get_blo
```python
def validate_blobs_and_kzg_commitments(execution_payload: ExecutionPayload,
blobs: Sequence[Blob],
blob_kzg_commitments: Sequence[KZGCommitment]) -> None:
blob_kzg_commitments: Sequence[KZGCommitment],
blob_kzg_proofs: Sequence[KZGProof]) -> None:
# Optionally sanity-check that the KZG commitments match the versioned hashes in the transactions
assert verify_kzg_commitments_against_transactions(execution_payload.transactions, blob_kzg_commitments)
# Optionally sanity-check that the KZG commitments match the blobs (as produced by the execution engine)
assert len(blob_kzg_commitments) == len(blobs)
assert all(blob_to_kzg_commitment(blob) == commitment for blob, commitment in zip(blobs, blob_kzg_commitments))
assert len(blob_kzg_commitments) == len(blobs) == len(blob_kzg_proofs)
assert verify_blob_kzg_proof_batch(blobs, blob_kzg_commitments, blob_kzg_proofs)
```
3. If valid, set `block.body.blob_kzg_commitments = blob_kzg_commitments`.

39
tests/core/pyspec/eth2spec/test/deneb/unittests/validator/test_validator.py
View File

@ -53,14 +53,15 @@ def test_validate_blobs_and_kzg_commitments(spec, state):
block.body.blob_kzg_commitments = blob_kzg_commitments
block.body.execution_payload.transactions = [opaque_tx]
block.body.execution_payload.block_hash = compute_el_block_hash(spec, block.body.execution_payload)
# state_transition_and_sign_block(spec, state, block)
blob_sidecars = spec.get_blob_sidecars(block, blobs)
blobs = [sidecar.blob for sidecar in blob_sidecars]
proofs = [sidecar.kzg_proof for sidecar in blob_sidecars]
spec.validate_blobs_and_kzg_commitments(block.body.execution_payload,
blobs,
blob_kzg_commitments)
blob_kzg_commitments,
proofs)
@with_deneb_and_later
@ -79,11 +80,39 @@ def test_validate_blobs_and_kzg_commitments_missing_blob(spec, state):
blob_sidecars = spec.get_blob_sidecars(block, blobs)
blobs = [sidecar.blob for sidecar in blob_sidecars][:-1]
proofs = [sidecar.kzg_proof for sidecar in blob_sidecars]
expect_assertion_error(lambda:
spec.validate_blobs_and_kzg_commitments(block.body.execution_payload,
blobs,
blob_kzg_commitments)
blob_kzg_commitments,
proofs)
)
@with_deneb_and_later
@spec_state_test
def test_validate_blobs_and_kzg_commitments_missing_proof(spec, state):
"""
Test `validate_blobs_and_kzg_commitments`
"""
blob_count = 4
block = build_empty_block_for_next_slot(spec, state)
opaque_tx, blobs, blob_kzg_commitments = get_sample_opaque_tx(spec, blob_count=blob_count)
block.body.blob_kzg_commitments = blob_kzg_commitments
block.body.execution_payload.transactions = [opaque_tx]
block.body.execution_payload.block_hash = compute_el_block_hash(spec, block.body.execution_payload)
# state_transition_and_sign_block(spec, state, block)
blob_sidecars = spec.get_blob_sidecars(block, blobs)
blobs = [sidecar.blob for sidecar in blob_sidecars]
proofs = [sidecar.kzg_proof for sidecar in blob_sidecars][:-1]
expect_assertion_error(lambda:
spec.validate_blobs_and_kzg_commitments(block.body.execution_payload,
blobs,
blob_kzg_commitments,
proofs)
)
@ -103,11 +132,13 @@ def test_validate_blobs_and_kzg_commitments_incorrect_blob(spec, state):
blob_sidecars = spec.get_blob_sidecars(block, blobs)
blobs = [sidecar.blob for sidecar in blob_sidecars]
proofs = [sidecar.kzg_proof for sidecar in blob_sidecars]
blobs[1] = spec.Blob(blobs[1][:13] + bytes([(blobs[1][13] + 1) % 256]) + blobs[1][14:])
expect_assertion_error(lambda:
spec.validate_blobs_and_kzg_commitments(block.body.execution_payload,
blobs,
blob_kzg_commitments)
blob_kzg_commitments,
proofs)
)