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Refactor ProcessAttestationNoVerifySignature to VerifyAttestationNoVerifySignature (#8566)

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Co-authored-by: Raul Jordan <raul@prysmaticlabs.com>
This commit is contained in:
terence tsao 2021-03-06 06:53:28 -08:00 committed by GitHub
parent f074c5ee89
commit 90da16432f
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 70 additions and 23 deletions
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51
beacon-chain/core/blocks/attestation.go
View File

@ -99,14 +99,14 @@ func ProcessAttestationsNoVerifySignature(
return beaconState, nil
}
// ProcessAttestationNoVerifySignature processes the attestation without verifying the attestation signature. This
// method is used to validate attestations whose signatures have already been verified.
func ProcessAttestationNoVerifySignature(
// VerifyAttestationNoVerifySignature verifies the attestation without verifying the attestation signature. This is
// used before processing attestation with the beacon state.
func VerifyAttestationNoVerifySignature(
ctx context.Context,
beaconState *stateTrie.BeaconState,
att *ethpb.Attestation,
) (*stateTrie.BeaconState, error) {
ctx, span := trace.StartSpan(ctx, "core.ProcessAttestationNoVerifySignature")
ctx, span := trace.StartSpan(ctx, "core.VerifyAttestationNoVerifySignature")
defer span.End()
if err := helpers.ValidateNilAttestation(att); err != nil {
@ -159,6 +159,36 @@ func ProcessAttestationNoVerifySignature(
return nil, errors.Wrap(err, "could not verify attestation bitfields")
}
// Verify attesting indices are correct.
committee, err := helpers.BeaconCommitteeFromState(beaconState, att.Data.Slot, att.Data.CommitteeIndex)
if err != nil {
return nil, err
}
indexedAtt, err := attestationutil.ConvertToIndexed(ctx, att, committee)
if err != nil {
return nil, err
}
return nil, attestationutil.IsValidAttestationIndices(ctx, indexedAtt)
}
// ProcessAttestationNoVerifySignature processes the attestation without verifying the attestation signature. This
// method is used to validate attestations whose signatures have already been verified.
func ProcessAttestationNoVerifySignature(
ctx context.Context,
beaconState *stateTrie.BeaconState,
att *ethpb.Attestation,
) (*stateTrie.BeaconState, error) {
ctx, span := trace.StartSpan(ctx, "core.ProcessAttestationNoVerifySignature")
defer span.End()
if _, err := VerifyAttestationNoVerifySignature(ctx, beaconState, att); err != nil {
return nil, err
}
currEpoch := helpers.CurrentEpoch(beaconState)
data := att.Data
s := att.Data.Slot
proposerIndex, err := helpers.BeaconProposerIndex(beaconState)
if err != nil {
return nil, err
@ -186,19 +216,6 @@ func ProcessAttestationNoVerifySignature(
}
}
// Verify attesting indices are correct.
committee, err := helpers.BeaconCommitteeFromState(beaconState, att.Data.Slot, att.Data.CommitteeIndex)
if err != nil {
return nil, err
}
indexedAtt, err := attestationutil.ConvertToIndexed(ctx, att, committee)
if err != nil {
return nil, err
}
if err := attestationutil.IsValidAttestationIndices(ctx, indexedAtt); err != nil {
return nil, err
}
return beaconState, nil
}

42
beacon-chain/core/blocks/attestation_test.go
View File

@ -81,14 +81,13 @@ func TestProcessAttestations_NeitherCurrentNorPrevEpoch(t *testing.T) {
}
func TestProcessAttestations_CurrentEpochFFGDataMismatches(t *testing.T) {
aggBits := bitfield.NewBitlist(3)
attestations := []*ethpb.Attestation{
{
Data: &ethpb.AttestationData{
Target: &ethpb.Checkpoint{Epoch: 0, Root: make([]byte, 32)},
Source: &ethpb.Checkpoint{Epoch: 1, Root: make([]byte, 32)},
},
AggregationBits: aggBits,
AggregationBits: bitfield.Bitlist{0x09},
},
}
b := testutil.NewBeaconBlock()
@ -357,7 +356,7 @@ func TestProcessAggregatedAttestation_NoOverlappingBits(t *testing.T) {
assert.NoError(t, err)
}
func TestProcessAttestationsNoVerify_IncorrectSlotTargetEpoch(t *testing.T) {
func TestVerifyAttestationNoVerifySignature_IncorrectSlotTargetEpoch(t *testing.T) {
beaconState, _ := testutil.DeterministicGenesisState(t, 1)
att := testutil.HydrateAttestation(&ethpb.Attestation{
@ -367,7 +366,7 @@ func TestProcessAttestationsNoVerify_IncorrectSlotTargetEpoch(t *testing.T) {
},
})
wanted := "slot 32 does not match target epoch 0"
_, err := blocks.ProcessAttestationNoVerifySignature(context.TODO(), beaconState, att)
_, err := blocks.VerifyAttestationNoVerifySignature(context.TODO(), beaconState, att)
assert.ErrorContains(t, wanted, err)
}
@ -402,7 +401,38 @@ func TestProcessAttestationsNoVerify_OK(t *testing.T) {
assert.NoError(t, err)
}
func TestProcessAttestationsNoVerify_BadAttIdx(t *testing.T) {
func TestVerifyAttestationNoVerifySignature_OK(t *testing.T) {
// Attestation with an empty signature
beaconState, _ := testutil.DeterministicGenesisState(t, 100)
aggBits := bitfield.NewBitlist(3)
aggBits.SetBitAt(1, true)
var mockRoot [32]byte
copy(mockRoot[:], "hello-world")
att := &ethpb.Attestation{
Data: &ethpb.AttestationData{
Source: &ethpb.Checkpoint{Epoch: 0, Root: mockRoot[:]},
Target: &ethpb.Checkpoint{Epoch: 0, Root: make([]byte, 32)},
},
AggregationBits: aggBits,
}
zeroSig := [96]byte{}
att.Signature = zeroSig[:]
err := beaconState.SetSlot(beaconState.Slot() + params.BeaconConfig().MinAttestationInclusionDelay)
require.NoError(t, err)
ckp := beaconState.CurrentJustifiedCheckpoint()
copy(ckp.Root, "hello-world")
require.NoError(t, beaconState.SetCurrentJustifiedCheckpoint(ckp))
require.NoError(t, beaconState.SetCurrentEpochAttestations([]*pb.PendingAttestation{}))
_, err = blocks.VerifyAttestationNoVerifySignature(context.TODO(), beaconState, att)
assert.NoError(t, err)
}
func TestVerifyAttestationNoVerifySignature_BadAttIdx(t *testing.T) {
beaconState, _ := testutil.DeterministicGenesisState(t, 100)
aggBits := bitfield.NewBitlist(3)
aggBits.SetBitAt(1, true)
@ -423,7 +453,7 @@ func TestProcessAttestationsNoVerify_BadAttIdx(t *testing.T) {
copy(ckp.Root, "hello-world")
require.NoError(t, beaconState.SetCurrentJustifiedCheckpoint(ckp))
require.NoError(t, beaconState.SetCurrentEpochAttestations([]*pb.PendingAttestation{}))
_, err := blocks.ProcessAttestationNoVerifySignature(context.TODO(), beaconState, att)
_, err := blocks.VerifyAttestationNoVerifySignature(context.TODO(), beaconState, att)
require.ErrorContains(t, "committee index 100 >= committee count 1", err)
}