Blob verification spectest (#13707)

* use real blob verifier in forkchoice spectest

* wip

* Use real blob sidecar for test

* Set file db correctly

* correctly handle blob cases where valid=false

* work-around spectest's weird Fork in genesis state

* gaz

* revert T-money's log level change

* rm whitespace

* unskip minimal test

* Preston's feedback

---------

Co-authored-by: Kasey Kirkham <kasey@users.noreply.github.com>
Co-authored-by: terence tsao <terence@prysmaticlabs.com>
This commit is contained in:
kasey 2024-03-08 12:20:38 -06:00 committed by GitHub
parent 9e7352704c
commit 07a0a95ee7
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
14 changed files with 275 additions and 60 deletions

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@ -45,6 +45,7 @@ go_test(
"blob_test.go",
"cache_test.go",
"initializer_test.go",
"result_test.go",
],
embed = [":go_default_library"],
deps = [

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@ -29,9 +29,7 @@ const (
RequireSidecarProposerExpected
)
// GossipSidecarRequirements defines the set of requirements that BlobSidecars received on gossip
// must satisfy in order to upgrade an ROBlob to a VerifiedROBlob.
var GossipSidecarRequirements = []Requirement{
var allSidecarRequirements = []Requirement{
RequireBlobIndexInBounds,
RequireNotFromFutureSlot,
RequireSlotAboveFinalized,
@ -45,26 +43,32 @@ var GossipSidecarRequirements = []Requirement{
RequireSidecarProposerExpected,
}
// GossipSidecarRequirements defines the set of requirements that BlobSidecars received on gossip
// must satisfy in order to upgrade an ROBlob to a VerifiedROBlob.
var GossipSidecarRequirements = requirementList(allSidecarRequirements).excluding()
// SpectestSidecarRequirements is used by the forkchoice spectests when verifying blobs used in the on_block tests.
// The only requirements we exclude for these tests are the parent validity and seen tests, as these are specific to
// gossip processing and require the bad block cache that we only use there.
var SpectestSidecarRequirements = requirementList(GossipSidecarRequirements).excluding(
RequireSidecarParentSeen, RequireSidecarParentValid)
// InitsyncSidecarRequirements is the list of verification requirements to be used by the init-sync service
// for batch-mode syncing. Because we only perform batch verification as part of the IsDataAvailable method
// for blobs after the block has been verified, and the blobs to be verified are keyed in the cache by the
// block root, it is safe to skip the following verifications.
// RequireSidecarProposerExpected
// RequireNotFromFutureSlot,
// RequireSlotAboveFinalized,
// RequireSidecarParentSeen,
// RequireSidecarParentValid,
// RequireSidecarParentSlotLower,
// RequireSidecarDescendsFromFinalized,
var InitsyncSidecarRequirements = []Requirement{
RequireValidProposerSignature,
RequireSidecarKzgProofVerified,
RequireBlobIndexInBounds,
RequireSidecarInclusionProven,
}
// block root, the list of required verifications is much shorter than gossip.
var InitsyncSidecarRequirements = requirementList(GossipSidecarRequirements).excluding(
RequireNotFromFutureSlot,
RequireSlotAboveFinalized,
RequireSidecarParentSeen,
RequireSidecarParentValid,
RequireSidecarParentSlotLower,
RequireSidecarDescendsFromFinalized,
RequireSidecarProposerExpected,
)
// BackfillSidecarRequirements is the same as InitsyncSidecarRequirements
var BackfillSidecarRequirements = InitsyncSidecarRequirements
// BackfillSidecarRequirements is the same as InitsyncSidecarRequirements.
var BackfillSidecarRequirements = requirementList(InitsyncSidecarRequirements).excluding()
var (
ErrBlobInvalid = errors.New("blob failed verification")

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@ -61,13 +61,17 @@ func (d SignatureData) logFields() log.Fields {
}
}
func newSigCache(vr []byte, size int) *sigCache {
return &sigCache{Cache: lruwrpr.New(size), valRoot: vr}
func newSigCache(vr []byte, size int, gf forkLookup) *sigCache {
if gf == nil {
gf = forks.Fork
}
return &sigCache{Cache: lruwrpr.New(size), valRoot: vr, getFork: gf}
}
type sigCache struct {
*lru.Cache
valRoot []byte
getFork forkLookup
}
// VerifySignature verifies the given signature data against the key obtained via ValidatorAtIndexer.
@ -81,7 +85,7 @@ func (c *sigCache) VerifySignature(sig SignatureData, v ValidatorAtIndexer) (err
}
}()
e := slots.ToEpoch(sig.Slot)
fork, err := forks.Fork(e)
fork, err := c.getFork(e)
if err != nil {
return err
}

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@ -27,7 +27,7 @@ func TestVerifySignature(t *testing.T) {
_, blobs, _, pk := testSignedBlockBlobKeys(t, valRoot[:], 0, 1)
b := blobs[0]
sc := newSigCache(valRoot[:], 1)
sc := newSigCache(valRoot[:], 1, nil)
cb := func(idx primitives.ValidatorIndex) (*eth.Validator, error) {
return &eth.Validator{PublicKey: pk.Marshal()}, nil
}
@ -42,7 +42,7 @@ func TestSignatureCacheMissThenHit(t *testing.T) {
_, blobs, _, pk := testSignedBlockBlobKeys(t, valRoot[:], 0, 1)
b := blobs[0]
sc := newSigCache(valRoot[:], 1)
sc := newSigCache(valRoot[:], 1, nil)
cb := func(idx primitives.ValidatorIndex) (*eth.Validator, error) {
return &eth.Validator{PublicKey: pk.Marshal()}, nil
}

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@ -13,11 +13,17 @@ type VerificationMultiError struct {
// Unwrap is used by errors.Is to unwrap errors.
func (ve VerificationMultiError) Unwrap() error {
if ve.err == nil {
return nil
}
return ve.err
}
// Error satisfies the standard error interface.
func (ve VerificationMultiError) Error() string {
if ve.err == nil {
return ""
}
return ve.err.Error()
}

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@ -10,6 +10,8 @@ import (
"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
"github.com/prysmaticlabs/prysm/v5/network/forks"
ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
)
// Forkchoicer represents the forkchoice methods that the verifiers need.
@ -59,13 +61,25 @@ func (ini *Initializer) NewBlobVerifier(b blocks.ROBlob, reqs []Requirement) *RO
// via the WaitForInitializer method.
type InitializerWaiter struct {
sync.RWMutex
ready bool
cw startup.ClockWaiter
ini *Initializer
ready bool
cw startup.ClockWaiter
ini *Initializer
getFork forkLookup
}
type forkLookup func(targetEpoch primitives.Epoch) (*ethpb.Fork, error)
type InitializerOption func(waiter *InitializerWaiter)
// WithForkLookup allows tests to modify how Fork consensus type lookup works. Needed for spectests with weird Forks.
func WithForkLookup(fl forkLookup) InitializerOption {
return func(iw *InitializerWaiter) {
iw.getFork = fl
}
}
// NewInitializerWaiter creates an InitializerWaiter which can be used to obtain an Initializer once async dependencies are ready.
func NewInitializerWaiter(cw startup.ClockWaiter, fc Forkchoicer, sr StateByRooter) *InitializerWaiter {
func NewInitializerWaiter(cw startup.ClockWaiter, fc Forkchoicer, sr StateByRooter, opts ...InitializerOption) *InitializerWaiter {
pc := newPropCache()
// signature cache is initialized in WaitForInitializer, since we need the genesis validators root, which can be obtained from startup.Clock.
shared := &sharedResources{
@ -73,7 +87,14 @@ func NewInitializerWaiter(cw startup.ClockWaiter, fc Forkchoicer, sr StateByRoot
pc: pc,
sr: sr,
}
return &InitializerWaiter{cw: cw, ini: &Initializer{shared: shared}}
iw := &InitializerWaiter{cw: cw, ini: &Initializer{shared: shared}}
for _, o := range opts {
o(iw)
}
if iw.getFork == nil {
iw.getFork = forks.Fork
}
return iw
}
// WaitForInitializer ensures that asynchronous initialization of the shared resources the initializer
@ -84,7 +105,7 @@ func (w *InitializerWaiter) WaitForInitializer(ctx context.Context) (*Initialize
}
// We wait until this point to initialize the signature cache because here we have access to the genesis validator root.
vr := w.ini.shared.clock.GenesisValidatorsRoot()
sc := newSigCache(vr[:], DefaultSignatureCacheSize)
sc := newSigCache(vr[:], DefaultSignatureCacheSize, w.getFork)
w.ini.shared.sc = sc
return w.ini, nil
}

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@ -3,6 +3,54 @@ package verification
// Requirement represents a validation check that needs to pass in order for a Verified form a consensus type to be issued.
type Requirement int
var unknownRequirementName = "unknown"
func (r Requirement) String() string {
switch r {
case RequireBlobIndexInBounds:
return "RequireBlobIndexInBounds"
case RequireNotFromFutureSlot:
return "RequireNotFromFutureSlot"
case RequireSlotAboveFinalized:
return "RequireSlotAboveFinalized"
case RequireValidProposerSignature:
return "RequireValidProposerSignature"
case RequireSidecarParentSeen:
return "RequireSidecarParentSeen"
case RequireSidecarParentValid:
return "RequireSidecarParentValid"
case RequireSidecarParentSlotLower:
return "RequireSidecarParentSlotLower"
case RequireSidecarDescendsFromFinalized:
return "RequireSidecarDescendsFromFinalized"
case RequireSidecarInclusionProven:
return "RequireSidecarInclusionProven"
case RequireSidecarKzgProofVerified:
return "RequireSidecarKzgProofVerified"
case RequireSidecarProposerExpected:
return "RequireSidecarProposerExpected"
default:
return unknownRequirementName
}
}
type requirementList []Requirement
func (rl requirementList) excluding(minus ...Requirement) []Requirement {
rm := make(map[Requirement]struct{})
nl := make([]Requirement, 0, len(rl)-len(minus))
for i := range minus {
rm[minus[i]] = struct{}{}
}
for i := range rl {
if _, excluded := rm[rl[i]]; excluded {
continue
}
nl = append(nl, rl[i])
}
return nl
}
// results collects positive verification results.
// This bitmap can be used to test which verifications have been successfully completed in order to
// decide whether it is safe to issue a "Verified" type variant.

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@ -0,0 +1,63 @@
package verification
import (
"math"
"testing"
"github.com/prysmaticlabs/prysm/v5/testing/require"
)
func TestResultList(t *testing.T) {
const (
a Requirement = iota
b
c
d
e
f
g
h
)
// leave out h to test excluding non-existent item
all := []Requirement{a, b, c, d, e, f, g}
alsoAll := requirementList(all).excluding()
require.DeepEqual(t, all, alsoAll)
missingFirst := requirementList(all).excluding(a)
require.Equal(t, len(all)-1, len(missingFirst))
require.DeepEqual(t, all[1:], missingFirst)
missingLast := requirementList(all).excluding(g)
require.Equal(t, len(all)-1, len(missingLast))
require.DeepEqual(t, all[0:len(all)-1], missingLast)
missingEnds := requirementList(missingLast).excluding(a)
require.Equal(t, len(missingLast)-1, len(missingEnds))
require.DeepEqual(t, all[1:len(all)-1], missingEnds)
excludeNonexist := requirementList(missingEnds).excluding(h)
require.Equal(t, len(missingEnds), len(excludeNonexist))
require.DeepEqual(t, missingEnds, excludeNonexist)
}
func TestExportedBlobSanityCheck(t *testing.T) {
// make sure all requirement lists contain the bare minimum checks
sanity := []Requirement{RequireValidProposerSignature, RequireSidecarKzgProofVerified, RequireBlobIndexInBounds, RequireSidecarInclusionProven}
reqs := [][]Requirement{GossipSidecarRequirements, SpectestSidecarRequirements, InitsyncSidecarRequirements, BackfillSidecarRequirements}
for i := range reqs {
r := reqs[i]
reqMap := make(map[Requirement]struct{})
for ii := range r {
reqMap[r[ii]] = struct{}{}
}
for ii := range sanity {
_, ok := reqMap[sanity[ii]]
require.Equal(t, true, ok)
}
}
require.DeepEqual(t, allSidecarRequirements, GossipSidecarRequirements)
}
func TestAllBlobRequirementsHaveStrings(t *testing.T) {
var derp Requirement = math.MaxInt
require.Equal(t, unknownRequirementName, derp.String())
for i := range allSidecarRequirements {
require.NotEqual(t, unknownRequirementName, allSidecarRequirements[i].String())
}
}

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@ -8,6 +8,5 @@ import (
)
func TestMainnet_Deneb_Forkchoice(t *testing.T) {
t.Skip("This will fail until we re-integrate proof verification")
forkchoice.Run(t, "mainnet", version.Deneb)
}

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@ -8,6 +8,5 @@ import (
)
func TestMinimal_Deneb_Forkchoice(t *testing.T) {
t.Skip("blocked by go-kzg-4844 minimal trusted setup")
forkchoice.Run(t, "minimal", version.Deneb)
}

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@ -22,6 +22,7 @@ go_library(
"//beacon-chain/db/filesystem:go_default_library",
"//beacon-chain/db/testing:go_default_library",
"//beacon-chain/execution:go_default_library",
"//beacon-chain/forkchoice:go_default_library",
"//beacon-chain/forkchoice/doubly-linked-tree:go_default_library",
"//beacon-chain/operations/attestations:go_default_library",
"//beacon-chain/startup:go_default_library",

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@ -10,7 +10,9 @@ import (
"github.com/ethereum/go-ethereum/common"
"github.com/prysmaticlabs/prysm/v5/beacon-chain/blockchain"
"github.com/prysmaticlabs/prysm/v5/beacon-chain/execution"
"github.com/prysmaticlabs/prysm/v5/beacon-chain/startup"
"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
"github.com/prysmaticlabs/prysm/v5/beacon-chain/verification"
"github.com/prysmaticlabs/prysm/v5/config/params"
"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
@ -23,16 +25,27 @@ type Builder struct {
service *blockchain.Service
lastTick int64
execMock *engineMock
vwait *verification.InitializerWaiter
}
func NewBuilder(t testing.TB, initialState state.BeaconState, initialBlock interfaces.ReadOnlySignedBeaconBlock) *Builder {
execMock := &engineMock{
powBlocks: make(map[[32]byte]*ethpb.PowBlock),
}
service := startChainService(t, initialState, initialBlock, execMock)
cw := startup.NewClockSynchronizer()
service, sg, fc := startChainService(t, initialState, initialBlock, execMock, cw)
// blob spectests use a weird Fork in the genesis beacon state that has different previous and current versions.
// This trips up the lite fork lookup code in the blob verifier that figures out the fork
// based on the slot of the block. So just for spectests we override that behavior and get the fork from the state
// which matches the behavior of block verification.
getFork := func(targetEpoch primitives.Epoch) (*ethpb.Fork, error) {
return initialState.Fork(), nil
}
bvw := verification.NewInitializerWaiter(cw, fc, sg, verification.WithForkLookup(getFork))
return &Builder{
service: service,
execMock: execMock,
vwait: bvw,
}
}
@ -88,7 +101,7 @@ func (bb *Builder) block(t testing.TB, b interfaces.ReadOnlySignedBeaconBlock) [
// InvalidBlock receives the invalid block and notifies forkchoice.
func (bb *Builder) InvalidBlock(t testing.TB, b interfaces.ReadOnlySignedBeaconBlock) {
r := bb.block(t, b)
ctx, cancel := context.WithTimeout(context.TODO(), time.Duration(params.BeaconConfig().SecondsPerSlot)*time.Second)
ctx, cancel := context.WithTimeout(context.TODO(), time.Second)
defer cancel()
require.Equal(t, true, bb.service.ReceiveBlock(ctx, b, r, nil) != nil)
}
@ -96,7 +109,7 @@ func (bb *Builder) InvalidBlock(t testing.TB, b interfaces.ReadOnlySignedBeaconB
// ValidBlock receives the valid block and notifies forkchoice.
func (bb *Builder) ValidBlock(t testing.TB, b interfaces.ReadOnlySignedBeaconBlock) {
r := bb.block(t, b)
ctx, cancel := context.WithTimeout(context.TODO(), time.Duration(params.BeaconConfig().SecondsPerSlot)*time.Second)
ctx, cancel := context.WithTimeout(context.TODO(), time.Second)
defer cancel()
require.NoError(t, bb.service.ReceiveBlock(ctx, b, r, nil))
}

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@ -5,6 +5,7 @@ import (
"fmt"
"os"
"path"
"strings"
"testing"
"github.com/ethereum/go-ethereum/common/hexutil"
@ -115,7 +116,7 @@ func runTest(t *testing.T, config string, fork int, basePath string) {
t.Fatalf("unknown fork version: %v", fork)
}
}
runBlobStep(t, step.Blobs, beaconBlock, fork, folder, testsFolderPath, step.Proofs, builder)
runBlobStep(t, step, beaconBlock, fork, folder, testsFolderPath, builder)
if beaconBlock != nil {
if step.Valid != nil && !*step.Valid {
builder.InvalidBlock(t, beaconBlock)
@ -281,14 +282,15 @@ func unmarshalSignedDenebBlock(t *testing.T, raw []byte) interfaces.SignedBeacon
}
func runBlobStep(t *testing.T,
blobs *string,
step Step,
beaconBlock interfaces.ReadOnlySignedBeaconBlock,
fork int,
folder os.DirEntry,
testsFolderPath string,
proofs []*string,
builder *Builder,
) {
blobs := step.Blobs
proofs := step.Proofs
if blobs != nil && *blobs != "null" {
require.NotNil(t, beaconBlock)
require.Equal(t, true, fork >= version.Deneb)
@ -305,44 +307,94 @@ func runBlobStep(t *testing.T,
require.NoError(t, err)
sh, err := beaconBlock.Header()
require.NoError(t, err)
for index := uint64(0); index*fieldparams.BlobLength < uint64(len(blobsSSZ)); index++ {
requireVerifyExpected := errAssertionForStep(step, verification.ErrBlobInvalid)
for index := 0; index*fieldparams.BlobLength < len(blobsSSZ); index++ {
var proof []byte
if index < uint64(len(proofs)) {
if index < len(proofs) {
proofPTR := proofs[index]
require.NotNil(t, proofPTR)
proof, err = hexutil.Decode(*proofPTR)
require.NoError(t, err)
}
var kzg []byte
if uint64(len(kzgs)) < index {
kzg = kzgs[index]
}
if len(kzg) == 0 {
kzg = make([]byte, 48)
}
blob := [fieldparams.BlobLength]byte{}
copy(blob[:], blobsSSZ[index*fieldparams.BlobLength:])
fakeProof := make([][]byte, fieldparams.KzgCommitmentInclusionProofDepth)
for i := range fakeProof {
fakeProof[i] = make([]byte, fieldparams.RootLength)
}
if len(proof) == 0 {
proof = make([]byte, 48)
}
inclusionProof, err := blocks.MerkleProofKZGCommitment(block.Body(), index)
require.NoError(t, err)
pb := &ethpb.BlobSidecar{
Index: index,
Index: uint64(index),
Blob: blob[:],
KzgCommitment: kzg,
KzgCommitment: kzgs[index],
KzgProof: proof,
SignedBlockHeader: sh,
CommitmentInclusionProof: fakeProof,
CommitmentInclusionProof: inclusionProof,
}
ro, err := blocks.NewROBlobWithRoot(pb, root)
require.NoError(t, err)
vsc, err := verification.BlobSidecarNoop(ro)
ini, err := builder.vwait.WaitForInitializer(context.Background())
require.NoError(t, err)
require.NoError(t, builder.service.ReceiveBlob(context.Background(), vsc))
bv := ini.NewBlobVerifier(ro, verification.SpectestSidecarRequirements)
ctx := context.Background()
if err := bv.BlobIndexInBounds(); err != nil {
t.Logf("BlobIndexInBounds error: %s", err.Error())
}
if err := bv.NotFromFutureSlot(); err != nil {
t.Logf("NotFromFutureSlot error: %s", err.Error())
}
if err := bv.SlotAboveFinalized(); err != nil {
t.Logf("SlotAboveFinalized error: %s", err.Error())
}
if err := bv.SidecarInclusionProven(); err != nil {
t.Logf("SidecarInclusionProven error: %s", err.Error())
}
if err := bv.SidecarKzgProofVerified(); err != nil {
t.Logf("SidecarKzgProofVerified error: %s", err.Error())
}
if err := bv.ValidProposerSignature(ctx); err != nil {
t.Logf("ValidProposerSignature error: %s", err.Error())
}
if err := bv.SidecarParentSlotLower(); err != nil {
t.Logf("SidecarParentSlotLower error: %s", err.Error())
}
if err := bv.SidecarDescendsFromFinalized(); err != nil {
t.Logf("SidecarDescendsFromFinalized error: %s", err.Error())
}
if err := bv.SidecarProposerExpected(ctx); err != nil {
t.Logf("SidecarProposerExpected error: %s", err.Error())
}
vsc, err := bv.VerifiedROBlob()
requireVerifyExpected(t, err)
if err == nil {
require.NoError(t, builder.service.ReceiveBlob(context.Background(), vsc))
}
}
}
}
func errAssertionForStep(step Step, expect error) func(t *testing.T, err error) {
if !*step.Valid {
return func(t *testing.T, err error) {
require.ErrorIs(t, err, expect)
}
}
return func(t *testing.T, err error) {
if err != nil {
require.ErrorIs(t, err, verification.ErrBlobInvalid)
me, ok := err.(verification.VerificationMultiError)
require.Equal(t, true, ok)
fails := me.Failures()
// we haven't performed any verification, so all the results should be this type
fmsg := make([]string, 0, len(fails))
for k, v := range fails {
fmsg = append(fmsg, fmt.Sprintf("%s - %s", v.Error(), k.String()))
}
t.Fatal(strings.Join(fmsg, ";"))
}
}
}

View File

@ -16,6 +16,7 @@ import (
coreTime "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/time"
"github.com/prysmaticlabs/prysm/v5/beacon-chain/db/filesystem"
testDB "github.com/prysmaticlabs/prysm/v5/beacon-chain/db/testing"
"github.com/prysmaticlabs/prysm/v5/beacon-chain/forkchoice"
doublylinkedtree "github.com/prysmaticlabs/prysm/v5/beacon-chain/forkchoice/doubly-linked-tree"
"github.com/prysmaticlabs/prysm/v5/beacon-chain/operations/attestations"
"github.com/prysmaticlabs/prysm/v5/beacon-chain/startup"
@ -34,7 +35,8 @@ func startChainService(t testing.TB,
st state.BeaconState,
block interfaces.ReadOnlySignedBeaconBlock,
engineMock *engineMock,
) *blockchain.Service {
clockSync *startup.ClockSynchronizer,
) (*blockchain.Service, *stategen.State, forkchoice.ForkChoicer) {
ctx := context.Background()
db := testDB.SetupDB(t)
require.NoError(t, db.SaveBlock(ctx, block))
@ -58,28 +60,30 @@ func startChainService(t testing.TB,
require.NoError(t, err)
fc := doublylinkedtree.New()
sg := stategen.New(db, fc)
opts := append([]blockchain.Option{},
blockchain.WithExecutionEngineCaller(engineMock),
blockchain.WithFinalizedStateAtStartUp(st),
blockchain.WithDatabase(db),
blockchain.WithAttestationService(attPool),
blockchain.WithForkChoiceStore(fc),
blockchain.WithStateGen(stategen.New(db, fc)),
blockchain.WithStateGen(sg),
blockchain.WithStateNotifier(&mock.MockStateNotifier{}),
blockchain.WithAttestationPool(attestations.NewPool()),
blockchain.WithDepositCache(depositCache),
blockchain.WithTrackedValidatorsCache(cache.NewTrackedValidatorsCache()),
blockchain.WithPayloadIDCache(cache.NewPayloadIDCache()),
blockchain.WithClockSynchronizer(startup.NewClockSynchronizer()),
blockchain.WithClockSynchronizer(clockSync),
blockchain.WithBlobStorage(filesystem.NewEphemeralBlobStorage(t)),
blockchain.WithSyncChecker(mock.MockChecker{}),
blockchain.WithBlobStorage(filesystem.NewEphemeralBlobStorage(t)),
)
service, err := blockchain.NewService(context.Background(), opts...)
require.NoError(t, err)
// force start kzg context here until Deneb fork epoch is decided
require.NoError(t, kzg.Start())
require.NoError(t, service.StartFromSavedState(st))
return service
return service, sg, fc
}
type engineMock struct {