engine_queue_test.go 35.8 KB
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package derive

import (
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	"context"
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	"fmt"
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	"io"
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	"math/big"
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	"math/rand"
	"testing"

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	"github.com/holiman/uint256"
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	"github.com/stretchr/testify/require"

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	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/log"

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	"github.com/ethereum-optimism/optimism/op-node/metrics"
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	"github.com/ethereum-optimism/optimism/op-node/rollup"
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	"github.com/ethereum-optimism/optimism/op-node/rollup/sync"
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	"github.com/ethereum-optimism/optimism/op-node/testlog"
	"github.com/ethereum-optimism/optimism/op-node/testutils"
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	"github.com/ethereum-optimism/optimism/op-service/eth"
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)

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type fakeAttributesQueue struct {
	origin eth.L1BlockRef
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	attrs  *eth.PayloadAttributes
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}

func (f *fakeAttributesQueue) Origin() eth.L1BlockRef {
	return f.origin
}

func (f *fakeAttributesQueue) NextAttributes(_ context.Context, _ eth.L2BlockRef) (*eth.PayloadAttributes, error) {
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	if f.attrs == nil {
		return nil, io.EOF
	}
	return f.attrs, nil
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}

var _ NextAttributesProvider = (*fakeAttributesQueue)(nil)

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func TestEngineQueue_Finalize(t *testing.T) {
	logger := testlog.Logger(t, log.LvlInfo)

	rng := rand.New(rand.NewSource(1234))

	l1Time := uint64(2)
	refA := testutils.RandomBlockRef(rng)

	refB := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refA.Number + 1,
		ParentHash: refA.Hash,
		Time:       refA.Time + l1Time,
	}
	refC := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refB.Number + 1,
		ParentHash: refB.Hash,
		Time:       refB.Time + l1Time,
	}
	refD := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refC.Number + 1,
		ParentHash: refC.Hash,
		Time:       refC.Time + l1Time,
	}
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	refE := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refD.Number + 1,
		ParentHash: refD.Hash,
		Time:       refD.Time + l1Time,
	}
	refF := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refE.Number + 1,
		ParentHash: refE.Hash,
		Time:       refE.Time + l1Time,
	}
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	refA0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         0,
		ParentHash:     common.Hash{},
		Time:           refA.Time,
		L1Origin:       refA.ID(),
		SequenceNumber: 0,
	}
	cfg := &rollup.Config{
		Genesis: rollup.Genesis{
			L1:     refA.ID(),
			L2:     refA0.ID(),
			L2Time: refA0.Time,
		},
		BlockTime:     1,
		SeqWindowSize: 2,
	}
	refA1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refA0.Number + 1,
		ParentHash:     refA0.Hash,
		Time:           refA0.Time + cfg.BlockTime,
		L1Origin:       refA.ID(),
		SequenceNumber: 1,
	}
	refB0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refA1.Number + 1,
		ParentHash:     refA1.Hash,
		Time:           refA1.Time + cfg.BlockTime,
		L1Origin:       refB.ID(),
		SequenceNumber: 0,
	}
	refB1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refB0.Number + 1,
		ParentHash:     refB0.Hash,
		Time:           refB0.Time + cfg.BlockTime,
		L1Origin:       refB.ID(),
		SequenceNumber: 1,
	}
	refC0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refB1.Number + 1,
		ParentHash:     refB1.Hash,
		Time:           refB1.Time + cfg.BlockTime,
		L1Origin:       refC.ID(),
		SequenceNumber: 0,
	}
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	refC1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refC0.Number + 1,
		ParentHash:     refC0.Hash,
		Time:           refC0.Time + cfg.BlockTime,
		L1Origin:       refC.ID(),
		SequenceNumber: 1,
	}
	refD0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refC1.Number + 1,
		ParentHash:     refC1.Hash,
		Time:           refC1.Time + cfg.BlockTime,
		L1Origin:       refD.ID(),
		SequenceNumber: 0,
	}
	refD1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refD0.Number + 1,
		ParentHash:     refD0.Hash,
		Time:           refD0.Time + cfg.BlockTime,
		L1Origin:       refD.ID(),
		SequenceNumber: 1,
	}
	refE0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refD1.Number + 1,
		ParentHash:     refD1.Hash,
		Time:           refD1.Time + cfg.BlockTime,
		L1Origin:       refE.ID(),
		SequenceNumber: 0,
	}
	refE1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refE0.Number + 1,
		ParentHash:     refE0.Hash,
		Time:           refE0.Time + cfg.BlockTime,
		L1Origin:       refE.ID(),
		SequenceNumber: 1,
	}
	refF0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refE1.Number + 1,
		ParentHash:     refE1.Hash,
		Time:           refE1.Time + cfg.BlockTime,
		L1Origin:       refF.ID(),
		SequenceNumber: 0,
	}
	refF1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refF0.Number + 1,
		ParentHash:     refF0.Hash,
		Time:           refF0.Time + cfg.BlockTime,
		L1Origin:       refF.ID(),
		SequenceNumber: 1,
	}
	t.Log("refA", refA.Hash)
	t.Log("refB", refB.Hash)
	t.Log("refC", refC.Hash)
	t.Log("refD", refD.Hash)
	t.Log("refE", refE.Hash)
	t.Log("refF", refF.Hash)
	t.Log("refA0", refA0.Hash)
	t.Log("refA1", refA1.Hash)
	t.Log("refB0", refB0.Hash)
	t.Log("refB1", refB1.Hash)
	t.Log("refC0", refC0.Hash)
	t.Log("refC1", refC1.Hash)
	t.Log("refD0", refD0.Hash)
	t.Log("refD1", refD1.Hash)
	t.Log("refE0", refE0.Hash)
	t.Log("refE1", refE1.Hash)
	t.Log("refF0", refF0.Hash)
	t.Log("refF1", refF1.Hash)
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	metrics := &testutils.TestDerivationMetrics{}
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	eng := &testutils.MockEngine{}
	// we find the common point to initialize to by comparing the L1 origins in the L2 chain with the L1 chain
	l1F := &testutils.MockL1Source{}

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	eng.ExpectL2BlockRefByLabel(eth.Finalized, refA1, nil)
	eng.ExpectL2BlockRefByLabel(eth.Safe, refE0, nil)
	eng.ExpectL2BlockRefByLabel(eth.Unsafe, refF1, nil)
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	// unsafe
	l1F.ExpectL1BlockRefByNumber(refF.Number, refF, nil)
	eng.ExpectL2BlockRefByHash(refF1.ParentHash, refF0, nil)
	eng.ExpectL2BlockRefByHash(refF0.ParentHash, refE1, nil)
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	// meet previous safe, counts 1/2
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	l1F.ExpectL1BlockRefByHash(refE.Hash, refE, nil)
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	eng.ExpectL2BlockRefByHash(refE1.ParentHash, refE0, nil)
	eng.ExpectL2BlockRefByHash(refE0.ParentHash, refD1, nil)

	// now full seq window, inclusive
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	l1F.ExpectL1BlockRefByHash(refD.Hash, refD, nil)
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	eng.ExpectL2BlockRefByHash(refD1.ParentHash, refD0, nil)
	eng.ExpectL2BlockRefByHash(refD0.ParentHash, refC1, nil)

	// now one more L1 origin
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	l1F.ExpectL1BlockRefByHash(refC.Hash, refC, nil)
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	eng.ExpectL2BlockRefByHash(refC1.ParentHash, refC0, nil)
	// parent of that origin will be considered safe
	eng.ExpectL2BlockRefByHash(refC0.ParentHash, refB1, nil)

	// and we fetch the L1 origin of that as starting point for engine queue
	l1F.ExpectL1BlockRefByHash(refB.Hash, refB, nil)
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	l1F.ExpectL1BlockRefByHash(refB.Hash, refB, nil)

	// and mock a L1 config for the last L2 block that references the L1 starting point
	eng.ExpectSystemConfigByL2Hash(refB1.Hash, eth.SystemConfig{
		BatcherAddr: common.Address{42},
		Overhead:    [32]byte{123},
		Scalar:      [32]byte{42},
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		GasLimit:    20_000_000,
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	}, nil)
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	prev := &fakeAttributesQueue{}

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	eq := NewEngineQueue(logger, cfg, eng, metrics, prev, l1F, &sync.Config{})
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	require.ErrorIs(t, eq.Reset(context.Background(), eth.L1BlockRef{}, eth.SystemConfig{}), io.EOF)
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	require.Equal(t, refB1, eq.SafeL2Head(), "L2 reset should go back to sequence window ago: blocks with origin E and D are not safe until we reconcile, C is extra, and B1 is the end we look for")
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	require.Equal(t, refB, eq.Origin(), "Expecting to be set back derivation L1 progress to B")
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	require.Equal(t, refA1, eq.Finalized(), "A1 is recognized as finalized before we run any steps")

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	// now say C1 was included in D and became the new safe head
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	eq.origin = refD
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	prev.origin = refD
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	eq.safeHead = refC1
	eq.postProcessSafeL2()

	// now say D0 was included in E and became the new safe head
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	eq.origin = refE
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	prev.origin = refE
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	eq.safeHead = refD0
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	eq.postProcessSafeL2()
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	// let's finalize D (current L1), from which we fully derived C1 (it was safe head), but not D0 (included in E)
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	eq.Finalize(refD)
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	require.Equal(t, refC1, eq.Finalized(), "C1 was included in finalized D, and should now be finalized")
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	l1F.AssertExpectations(t)
	eng.AssertExpectations(t)
}
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func TestEngineQueue_ResetWhenUnsafeOriginNotCanonical(t *testing.T) {
	logger := testlog.Logger(t, log.LvlInfo)

	rng := rand.New(rand.NewSource(1234))

	l1Time := uint64(2)
	refA := testutils.RandomBlockRef(rng)

	refB := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refA.Number + 1,
		ParentHash: refA.Hash,
		Time:       refA.Time + l1Time,
	}
	refC := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refB.Number + 1,
		ParentHash: refB.Hash,
		Time:       refB.Time + l1Time,
	}
	refD := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refC.Number + 1,
		ParentHash: refC.Hash,
		Time:       refC.Time + l1Time,
	}
	refE := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refD.Number + 1,
		ParentHash: refD.Hash,
		Time:       refD.Time + l1Time,
	}
	refF := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refE.Number + 1,
		ParentHash: refE.Hash,
		Time:       refE.Time + l1Time,
	}

	refA0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         0,
		ParentHash:     common.Hash{},
		Time:           refA.Time,
		L1Origin:       refA.ID(),
		SequenceNumber: 0,
	}
	cfg := &rollup.Config{
		Genesis: rollup.Genesis{
			L1:     refA.ID(),
			L2:     refA0.ID(),
			L2Time: refA0.Time,
		},
		BlockTime:     1,
		SeqWindowSize: 2,
	}
	refA1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refA0.Number + 1,
		ParentHash:     refA0.Hash,
		Time:           refA0.Time + cfg.BlockTime,
		L1Origin:       refA.ID(),
		SequenceNumber: 1,
	}
	refB0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refA1.Number + 1,
		ParentHash:     refA1.Hash,
		Time:           refA1.Time + cfg.BlockTime,
		L1Origin:       refB.ID(),
		SequenceNumber: 0,
	}
	refB1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refB0.Number + 1,
		ParentHash:     refB0.Hash,
		Time:           refB0.Time + cfg.BlockTime,
		L1Origin:       refB.ID(),
		SequenceNumber: 1,
	}
	refC0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refB1.Number + 1,
		ParentHash:     refB1.Hash,
		Time:           refB1.Time + cfg.BlockTime,
		L1Origin:       refC.ID(),
		SequenceNumber: 0,
	}
	refC1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refC0.Number + 1,
		ParentHash:     refC0.Hash,
		Time:           refC0.Time + cfg.BlockTime,
		L1Origin:       refC.ID(),
		SequenceNumber: 1,
	}
	refD0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refC1.Number + 1,
		ParentHash:     refC1.Hash,
		Time:           refC1.Time + cfg.BlockTime,
		L1Origin:       refD.ID(),
		SequenceNumber: 0,
	}
	refD1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refD0.Number + 1,
		ParentHash:     refD0.Hash,
		Time:           refD0.Time + cfg.BlockTime,
		L1Origin:       refD.ID(),
		SequenceNumber: 1,
	}
	refE0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refD1.Number + 1,
		ParentHash:     refD1.Hash,
		Time:           refD1.Time + cfg.BlockTime,
		L1Origin:       refE.ID(),
		SequenceNumber: 0,
	}
	refE1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refE0.Number + 1,
		ParentHash:     refE0.Hash,
		Time:           refE0.Time + cfg.BlockTime,
		L1Origin:       refE.ID(),
		SequenceNumber: 1,
	}
	refF0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refE1.Number + 1,
		ParentHash:     refE1.Hash,
		Time:           refE1.Time + cfg.BlockTime,
		L1Origin:       refF.ID(),
		SequenceNumber: 0,
	}
	refF1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refF0.Number + 1,
		ParentHash:     refF0.Hash,
		Time:           refF0.Time + cfg.BlockTime,
		L1Origin:       refF.ID(),
		SequenceNumber: 1,
	}
	t.Log("refA", refA.Hash)
	t.Log("refB", refB.Hash)
	t.Log("refC", refC.Hash)
	t.Log("refD", refD.Hash)
	t.Log("refE", refE.Hash)
	t.Log("refF", refF.Hash)
	t.Log("refA0", refA0.Hash)
	t.Log("refA1", refA1.Hash)
	t.Log("refB0", refB0.Hash)
	t.Log("refB1", refB1.Hash)
	t.Log("refC0", refC0.Hash)
	t.Log("refC1", refC1.Hash)
	t.Log("refD0", refD0.Hash)
	t.Log("refD1", refD1.Hash)
	t.Log("refE0", refE0.Hash)
	t.Log("refE1", refE1.Hash)
	t.Log("refF0", refF0.Hash)
	t.Log("refF1", refF1.Hash)

	metrics := &testutils.TestDerivationMetrics{}
	eng := &testutils.MockEngine{}
	// we find the common point to initialize to by comparing the L1 origins in the L2 chain with the L1 chain
	l1F := &testutils.MockL1Source{}

	eng.ExpectL2BlockRefByLabel(eth.Finalized, refA1, nil)
	eng.ExpectL2BlockRefByLabel(eth.Safe, refE0, nil)
	eng.ExpectL2BlockRefByLabel(eth.Unsafe, refF1, nil)

	// unsafe
	l1F.ExpectL1BlockRefByNumber(refF.Number, refF, nil)
	eng.ExpectL2BlockRefByHash(refF1.ParentHash, refF0, nil)
	eng.ExpectL2BlockRefByHash(refF0.ParentHash, refE1, nil)

	// meet previous safe, counts 1/2
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	l1F.ExpectL1BlockRefByHash(refE.Hash, refE, nil)
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	eng.ExpectL2BlockRefByHash(refE1.ParentHash, refE0, nil)
	eng.ExpectL2BlockRefByHash(refE0.ParentHash, refD1, nil)

	// now full seq window, inclusive
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	l1F.ExpectL1BlockRefByHash(refD.Hash, refD, nil)
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	eng.ExpectL2BlockRefByHash(refD1.ParentHash, refD0, nil)
	eng.ExpectL2BlockRefByHash(refD0.ParentHash, refC1, nil)

	// now one more L1 origin
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	l1F.ExpectL1BlockRefByHash(refC.Hash, refC, nil)
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	eng.ExpectL2BlockRefByHash(refC1.ParentHash, refC0, nil)
	// parent of that origin will be considered safe
	eng.ExpectL2BlockRefByHash(refC0.ParentHash, refB1, nil)

	// and we fetch the L1 origin of that as starting point for engine queue
	l1F.ExpectL1BlockRefByHash(refB.Hash, refB, nil)
	l1F.ExpectL1BlockRefByHash(refB.Hash, refB, nil)

	// and mock a L1 config for the last L2 block that references the L1 starting point
	eng.ExpectSystemConfigByL2Hash(refB1.Hash, eth.SystemConfig{
		BatcherAddr: common.Address{42},
		Overhead:    [32]byte{123},
		Scalar:      [32]byte{42},
		GasLimit:    20_000_000,
	}, nil)

	prev := &fakeAttributesQueue{origin: refE}

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	eq := NewEngineQueue(logger, cfg, eng, metrics, prev, l1F, &sync.Config{})
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	require.ErrorIs(t, eq.Reset(context.Background(), eth.L1BlockRef{}, eth.SystemConfig{}), io.EOF)

	require.Equal(t, refB1, eq.SafeL2Head(), "L2 reset should go back to sequence window ago: blocks with origin E and D are not safe until we reconcile, C is extra, and B1 is the end we look for")
	require.Equal(t, refB, eq.Origin(), "Expecting to be set back derivation L1 progress to B")
	require.Equal(t, refA1, eq.Finalized(), "A1 is recognized as finalized before we run any steps")

	// First step after reset will do a fork choice update
	require.True(t, eq.needForkchoiceUpdate)
	eng.ExpectForkchoiceUpdate(&eth.ForkchoiceState{
		HeadBlockHash:      eq.unsafeHead.Hash,
		SafeBlockHash:      eq.safeHead.Hash,
		FinalizedBlockHash: eq.finalized.Hash,
	}, nil, &eth.ForkchoiceUpdatedResult{PayloadStatus: eth.PayloadStatusV1{Status: eth.ExecutionValid}}, nil)
	err := eq.Step(context.Background())
	require.NoError(t, err)

	require.Equal(t, refF.ID(), eq.unsafeHead.L1Origin, "should have refF as unsafe head origin")

	// L1 chain reorgs so new origin is at same slot as refF but on a different fork
	prev.origin = eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refF.Number,
		ParentHash: refE.Hash,
		Time:       refF.Time,
	}
	eq.UnsafeL2Head()
	err = eq.Step(context.Background())
	require.ErrorIs(t, err, ErrReset, "should reset pipeline due to mismatched origin")

	l1F.AssertExpectations(t)
	eng.AssertExpectations(t)
}

func TestVerifyNewL1Origin(t *testing.T) {
	logger := testlog.Logger(t, log.LvlInfo)

	rng := rand.New(rand.NewSource(1234))

	l1Time := uint64(2)
	refA := testutils.RandomBlockRef(rng)

	refB := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refA.Number + 1,
		ParentHash: refA.Hash,
		Time:       refA.Time + l1Time,
	}
	refC := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refB.Number + 1,
		ParentHash: refB.Hash,
		Time:       refB.Time + l1Time,
	}
	refD := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refC.Number + 1,
		ParentHash: refC.Hash,
		Time:       refC.Time + l1Time,
	}
	refE := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refD.Number + 1,
		ParentHash: refD.Hash,
		Time:       refD.Time + l1Time,
	}
	refF := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refE.Number + 1,
		ParentHash: refE.Hash,
		Time:       refE.Time + l1Time,
	}
	refG := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refF.Number + 1,
		ParentHash: refF.Hash,
		Time:       refF.Time + l1Time,
	}
	refH := eth.L1BlockRef{
		Hash:       testutils.RandomHash(rng),
		Number:     refG.Number + 1,
		ParentHash: refG.Hash,
		Time:       refG.Time + l1Time,
	}

	refA0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         0,
		ParentHash:     common.Hash{},
		Time:           refA.Time,
		L1Origin:       refA.ID(),
		SequenceNumber: 0,
	}
	cfg := &rollup.Config{
		Genesis: rollup.Genesis{
			L1:     refA.ID(),
			L2:     refA0.ID(),
			L2Time: refA0.Time,
		},
		BlockTime:     1,
		SeqWindowSize: 2,
	}
	refA1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refA0.Number + 1,
		ParentHash:     refA0.Hash,
		Time:           refA0.Time + cfg.BlockTime,
		L1Origin:       refA.ID(),
		SequenceNumber: 1,
	}
	refB0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refA1.Number + 1,
		ParentHash:     refA1.Hash,
		Time:           refA1.Time + cfg.BlockTime,
		L1Origin:       refB.ID(),
		SequenceNumber: 0,
	}
	refB1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refB0.Number + 1,
		ParentHash:     refB0.Hash,
		Time:           refB0.Time + cfg.BlockTime,
		L1Origin:       refB.ID(),
		SequenceNumber: 1,
	}
	refC0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refB1.Number + 1,
		ParentHash:     refB1.Hash,
		Time:           refB1.Time + cfg.BlockTime,
		L1Origin:       refC.ID(),
		SequenceNumber: 0,
	}
	refC1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refC0.Number + 1,
		ParentHash:     refC0.Hash,
		Time:           refC0.Time + cfg.BlockTime,
		L1Origin:       refC.ID(),
		SequenceNumber: 1,
	}
	refD0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refC1.Number + 1,
		ParentHash:     refC1.Hash,
		Time:           refC1.Time + cfg.BlockTime,
		L1Origin:       refD.ID(),
		SequenceNumber: 0,
	}
	refD1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refD0.Number + 1,
		ParentHash:     refD0.Hash,
		Time:           refD0.Time + cfg.BlockTime,
		L1Origin:       refD.ID(),
		SequenceNumber: 1,
	}
	refE0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refD1.Number + 1,
		ParentHash:     refD1.Hash,
		Time:           refD1.Time + cfg.BlockTime,
		L1Origin:       refE.ID(),
		SequenceNumber: 0,
	}
	refE1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refE0.Number + 1,
		ParentHash:     refE0.Hash,
		Time:           refE0.Time + cfg.BlockTime,
		L1Origin:       refE.ID(),
		SequenceNumber: 1,
	}
	refF0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refE1.Number + 1,
		ParentHash:     refE1.Hash,
		Time:           refE1.Time + cfg.BlockTime,
		L1Origin:       refF.ID(),
		SequenceNumber: 0,
	}
	refF1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refF0.Number + 1,
		ParentHash:     refF0.Hash,
		Time:           refF0.Time + cfg.BlockTime,
		L1Origin:       refF.ID(),
		SequenceNumber: 1,
	}
	t.Log("refA", refA.Hash)
	t.Log("refB", refB.Hash)
	t.Log("refC", refC.Hash)
	t.Log("refD", refD.Hash)
	t.Log("refE", refE.Hash)
	t.Log("refF", refF.Hash)
	t.Log("refG", refG.Hash)
	t.Log("refH", refH.Hash)
	t.Log("refA0", refA0.Hash)
	t.Log("refA1", refA1.Hash)
	t.Log("refB0", refB0.Hash)
	t.Log("refB1", refB1.Hash)
	t.Log("refC0", refC0.Hash)
	t.Log("refC1", refC1.Hash)
	t.Log("refD0", refD0.Hash)
	t.Log("refD1", refD1.Hash)
	t.Log("refE0", refE0.Hash)
	t.Log("refE1", refE1.Hash)
	t.Log("refF0", refF0.Hash)
	t.Log("refF1", refF1.Hash)

	metrics := &testutils.TestDerivationMetrics{}

	tests := []struct {
		name                string
		newOrigin           eth.L1BlockRef
		expectReset         bool
		expectedFetchBlocks map[uint64]eth.L1BlockRef
	}{
		{
			name:        "L1OriginBeforeUnsafeOrigin",
			newOrigin:   refD,
			expectReset: false,
		},
		{
			name:        "Matching",
			newOrigin:   refF,
			expectReset: false,
		},
		{
			name: "BlockNumberEqualDifferentHash",
			newOrigin: eth.L1BlockRef{
				Hash:       testutils.RandomHash(rng),
				Number:     refF.Number,
				ParentHash: refE.Hash,
				Time:       refF.Time,
			},
			expectReset: true,
		},
		{
			name:        "UnsafeIsParent",
			newOrigin:   refG,
			expectReset: false,
		},
		{
			name: "UnsafeIsParentNumberDifferentHash",
			newOrigin: eth.L1BlockRef{
				Hash:       testutils.RandomHash(rng),
				Number:     refG.Number,
				ParentHash: testutils.RandomHash(rng),
				Time:       refG.Time,
			},
			expectReset: true,
		},
		{
			name:        "UnsafeIsOlderCanonical",
			newOrigin:   refH,
			expectReset: false,
			expectedFetchBlocks: map[uint64]eth.L1BlockRef{
				refF.Number: refF,
			},
		},
		{
			name: "UnsafeIsOlderNonCanonical",
			newOrigin: eth.L1BlockRef{
				Hash:       testutils.RandomHash(rng),
				Number:     refH.Number,
				ParentHash: testutils.RandomHash(rng),
				Time:       refH.Time,
			},
			expectReset: true,
			expectedFetchBlocks: map[uint64]eth.L1BlockRef{
				// Second look up gets a different block in F's block number due to a reorg
				refF.Number: {
					Hash:       testutils.RandomHash(rng),
					Number:     refF.Number,
					ParentHash: refE.Hash,
					Time:       refF.Time,
				},
			},
		},
	}
	for _, test := range tests {
		test := test
		t.Run(test.name, func(t *testing.T) {
			eng := &testutils.MockEngine{}
			// we find the common point to initialize to by comparing the L1 origins in the L2 chain with the L1 chain
			l1F := &testutils.MockL1Source{}

			eng.ExpectL2BlockRefByLabel(eth.Finalized, refA1, nil)
			eng.ExpectL2BlockRefByLabel(eth.Safe, refE0, nil)
			eng.ExpectL2BlockRefByLabel(eth.Unsafe, refF1, nil)

			// unsafe
			l1F.ExpectL1BlockRefByNumber(refF.Number, refF, nil)
			eng.ExpectL2BlockRefByHash(refF1.ParentHash, refF0, nil)
			eng.ExpectL2BlockRefByHash(refF0.ParentHash, refE1, nil)

			for blockNum, block := range test.expectedFetchBlocks {
				l1F.ExpectL1BlockRefByNumber(blockNum, block, nil)
			}

			// meet previous safe, counts 1/2
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			l1F.ExpectL1BlockRefByHash(refE.Hash, refE, nil)
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			eng.ExpectL2BlockRefByHash(refE1.ParentHash, refE0, nil)
			eng.ExpectL2BlockRefByHash(refE0.ParentHash, refD1, nil)

			// now full seq window, inclusive
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			l1F.ExpectL1BlockRefByHash(refD.Hash, refD, nil)
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			eng.ExpectL2BlockRefByHash(refD1.ParentHash, refD0, nil)
			eng.ExpectL2BlockRefByHash(refD0.ParentHash, refC1, nil)

			// now one more L1 origin
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			l1F.ExpectL1BlockRefByHash(refC.Hash, refC, nil)
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			eng.ExpectL2BlockRefByHash(refC1.ParentHash, refC0, nil)
			// parent of that origin will be considered safe
			eng.ExpectL2BlockRefByHash(refC0.ParentHash, refB1, nil)

			// and we fetch the L1 origin of that as starting point for engine queue
			l1F.ExpectL1BlockRefByHash(refB.Hash, refB, nil)
			l1F.ExpectL1BlockRefByHash(refB.Hash, refB, nil)

			// and mock a L1 config for the last L2 block that references the L1 starting point
			eng.ExpectSystemConfigByL2Hash(refB1.Hash, eth.SystemConfig{
				BatcherAddr: common.Address{42},
				Overhead:    [32]byte{123},
				Scalar:      [32]byte{42},
				GasLimit:    20_000_000,
			}, nil)

			prev := &fakeAttributesQueue{origin: refE}
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			eq := NewEngineQueue(logger, cfg, eng, metrics, prev, l1F, &sync.Config{})
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			require.ErrorIs(t, eq.Reset(context.Background(), eth.L1BlockRef{}, eth.SystemConfig{}), io.EOF)

			require.Equal(t, refB1, eq.SafeL2Head(), "L2 reset should go back to sequence window ago: blocks with origin E and D are not safe until we reconcile, C is extra, and B1 is the end we look for")
			require.Equal(t, refB, eq.Origin(), "Expecting to be set back derivation L1 progress to B")
			require.Equal(t, refA1, eq.Finalized(), "A1 is recognized as finalized before we run any steps")

			// First step after reset will do a fork choice update
			require.True(t, eq.needForkchoiceUpdate)
			eng.ExpectForkchoiceUpdate(&eth.ForkchoiceState{
				HeadBlockHash:      eq.unsafeHead.Hash,
				SafeBlockHash:      eq.safeHead.Hash,
				FinalizedBlockHash: eq.finalized.Hash,
			}, nil, &eth.ForkchoiceUpdatedResult{PayloadStatus: eth.PayloadStatusV1{Status: eth.ExecutionValid}}, nil)
			err := eq.Step(context.Background())
			require.NoError(t, err)

			require.Equal(t, refF.ID(), eq.unsafeHead.L1Origin, "should have refF as unsafe head origin")

			// L1 chain reorgs so new origin is at same slot as refF but on a different fork
			prev.origin = test.newOrigin
			eq.UnsafeL2Head()
			err = eq.Step(context.Background())
			if test.expectReset {
				require.ErrorIs(t, err, ErrReset, "should reset pipeline due to mismatched origin")
			} else {
				require.ErrorIs(t, err, io.EOF, "should not reset pipeline")
			}

			l1F.AssertExpectations(t)
			eng.AssertExpectations(t)
		})
	}
}
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func TestBlockBuildingRace(t *testing.T) {
	logger := testlog.Logger(t, log.LvlInfo)
	eng := &testutils.MockEngine{}

	rng := rand.New(rand.NewSource(1234))

	refA := testutils.RandomBlockRef(rng)
	refA0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         0,
		ParentHash:     common.Hash{},
		Time:           refA.Time,
		L1Origin:       refA.ID(),
		SequenceNumber: 0,
	}
	cfg := &rollup.Config{
		Genesis: rollup.Genesis{
			L1:     refA.ID(),
			L2:     refA0.ID(),
			L2Time: refA0.Time,
			SystemConfig: eth.SystemConfig{
				BatcherAddr: common.Address{42},
				Overhead:    [32]byte{123},
				Scalar:      [32]byte{42},
				GasLimit:    20_000_000,
			},
		},
		BlockTime:     1,
		SeqWindowSize: 2,
	}
	refA1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refA0.Number + 1,
		ParentHash:     refA0.Hash,
		Time:           refA0.Time + cfg.BlockTime,
		L1Origin:       refA.ID(),
		SequenceNumber: 1,
	}

	l1F := &testutils.MockL1Source{}

	eng.ExpectL2BlockRefByLabel(eth.Finalized, refA0, nil)
	eng.ExpectL2BlockRefByLabel(eth.Safe, refA0, nil)
	eng.ExpectL2BlockRefByLabel(eth.Unsafe, refA0, nil)
	l1F.ExpectL1BlockRefByNumber(refA.Number, refA, nil)
	l1F.ExpectL1BlockRefByHash(refA.Hash, refA, nil)
	l1F.ExpectL1BlockRefByHash(refA.Hash, refA, nil)

	eng.ExpectSystemConfigByL2Hash(refA0.Hash, cfg.Genesis.SystemConfig, nil)

	metrics := &testutils.TestDerivationMetrics{}

	gasLimit := eth.Uint64Quantity(20_000_000)
	attrs := &eth.PayloadAttributes{
		Timestamp:             eth.Uint64Quantity(refA1.Time),
		PrevRandao:            eth.Bytes32{},
		SuggestedFeeRecipient: common.Address{},
		Transactions:          nil,
		NoTxPool:              false,
		GasLimit:              &gasLimit,
	}

	prev := &fakeAttributesQueue{origin: refA, attrs: attrs}
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	eq := NewEngineQueue(logger, cfg, eng, metrics, prev, l1F, &sync.Config{})
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	require.ErrorIs(t, eq.Reset(context.Background(), eth.L1BlockRef{}, eth.SystemConfig{}), io.EOF)

	id := eth.PayloadID{0xff}

	preFc := &eth.ForkchoiceState{
		HeadBlockHash:      refA0.Hash,
		SafeBlockHash:      refA0.Hash,
		FinalizedBlockHash: refA0.Hash,
	}
	preFcRes := &eth.ForkchoiceUpdatedResult{
		PayloadStatus: eth.PayloadStatusV1{
			Status:          eth.ExecutionValid,
			LatestValidHash: &refA0.Hash,
			ValidationError: nil,
		},
		PayloadID: &id,
	}

	// Expect initial forkchoice update
	eng.ExpectForkchoiceUpdate(preFc, nil, preFcRes, nil)
	require.NoError(t, eq.Step(context.Background()), "clean forkchoice state after reset")

	// Expect initial building update, to process the attributes we queued up
	eng.ExpectForkchoiceUpdate(preFc, attrs, preFcRes, nil)
	// Don't let the payload be confirmed straight away
	mockErr := fmt.Errorf("mock error")
	eng.ExpectGetPayload(id, nil, mockErr)
	// The job will be not be cancelled, the untyped error is a temporary error

	require.ErrorIs(t, eq.Step(context.Background()), NotEnoughData, "queue up attributes")
	require.ErrorIs(t, eq.Step(context.Background()), mockErr, "expecting to fail to process attributes")
	require.NotNil(t, eq.safeAttributes, "still have attributes")

	// Now allow the building to complete
	a1InfoTx, err := L1InfoDepositBytes(refA1.SequenceNumber, &testutils.MockBlockInfo{
		InfoHash:        refA.Hash,
		InfoParentHash:  refA.ParentHash,
		InfoCoinbase:    common.Address{},
		InfoRoot:        common.Hash{},
		InfoNum:         refA.Number,
		InfoTime:        refA.Time,
		InfoMixDigest:   [32]byte{},
		InfoBaseFee:     big.NewInt(7),
		InfoReceiptRoot: common.Hash{},
		InfoGasUsed:     0,
	}, cfg.Genesis.SystemConfig, false)

	require.NoError(t, err)
	payloadA1 := &eth.ExecutionPayload{
		ParentHash:    refA1.ParentHash,
		FeeRecipient:  attrs.SuggestedFeeRecipient,
		StateRoot:     eth.Bytes32{},
		ReceiptsRoot:  eth.Bytes32{},
		LogsBloom:     eth.Bytes256{},
		PrevRandao:    eth.Bytes32{},
		BlockNumber:   eth.Uint64Quantity(refA1.Number),
		GasLimit:      gasLimit,
		GasUsed:       0,
		Timestamp:     eth.Uint64Quantity(refA1.Time),
		ExtraData:     nil,
		BaseFeePerGas: *uint256.NewInt(7),
		BlockHash:     refA1.Hash,
		Transactions: []eth.Data{
			a1InfoTx,
		},
	}
	eng.ExpectGetPayload(id, payloadA1, nil)
	eng.ExpectNewPayload(payloadA1, &eth.PayloadStatusV1{
		Status:          eth.ExecutionValid,
		LatestValidHash: &refA1.Hash,
		ValidationError: nil,
	}, nil)
	postFc := &eth.ForkchoiceState{
		HeadBlockHash:      refA1.Hash,
		SafeBlockHash:      refA1.Hash,
		FinalizedBlockHash: refA0.Hash,
	}
	postFcRes := &eth.ForkchoiceUpdatedResult{
		PayloadStatus: eth.PayloadStatusV1{
			Status:          eth.ExecutionValid,
			LatestValidHash: &refA1.Hash,
			ValidationError: nil,
		},
		PayloadID: &id,
	}
	eng.ExpectForkchoiceUpdate(postFc, nil, postFcRes, nil)

	// Now complete the job, as external user of the engine
	_, _, err = eq.ConfirmPayload(context.Background())
	require.NoError(t, err)
	require.Equal(t, refA1, eq.SafeL2Head(), "safe head should have changed")

	require.NoError(t, eq.Step(context.Background()))
	require.Nil(t, eq.safeAttributes, "attributes should now be invalidated")

	l1F.AssertExpectations(t)
	eng.AssertExpectations(t)
}
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func TestResetLoop(t *testing.T) {
	logger := testlog.Logger(t, log.LvlInfo)
	eng := &testutils.MockEngine{}
	l1F := &testutils.MockL1Source{}

	rng := rand.New(rand.NewSource(1234))

	refA := testutils.RandomBlockRef(rng)
	refA0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         0,
		ParentHash:     common.Hash{},
		Time:           refA.Time,
		L1Origin:       refA.ID(),
		SequenceNumber: 0,
	}
	gasLimit := eth.Uint64Quantity(20_000_000)
	cfg := &rollup.Config{
		Genesis: rollup.Genesis{
			L1:     refA.ID(),
			L2:     refA0.ID(),
			L2Time: refA0.Time,
			SystemConfig: eth.SystemConfig{
				BatcherAddr: common.Address{42},
				Overhead:    [32]byte{123},
				Scalar:      [32]byte{42},
				GasLimit:    20_000_000,
			},
		},
		BlockTime:     1,
		SeqWindowSize: 2,
	}
	refA1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refA0.Number + 1,
		ParentHash:     refA0.Hash,
		Time:           refA0.Time + cfg.BlockTime,
		L1Origin:       refA.ID(),
		SequenceNumber: 1,
	}
	refA2 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refA1.Number + 1,
		ParentHash:     refA1.Hash,
		Time:           refA1.Time + cfg.BlockTime,
		L1Origin:       refA.ID(),
		SequenceNumber: 2,
	}

	attrs := &eth.PayloadAttributes{
		Timestamp:             eth.Uint64Quantity(refA2.Time),
		PrevRandao:            eth.Bytes32{},
		SuggestedFeeRecipient: common.Address{},
		Transactions:          nil,
		NoTxPool:              false,
		GasLimit:              &gasLimit,
	}

	eng.ExpectL2BlockRefByLabel(eth.Finalized, refA0, nil)
	eng.ExpectL2BlockRefByLabel(eth.Safe, refA1, nil)
	eng.ExpectL2BlockRefByLabel(eth.Unsafe, refA2, nil)
	eng.ExpectL2BlockRefByHash(refA1.Hash, refA1, nil)
	eng.ExpectL2BlockRefByHash(refA0.Hash, refA0, nil)
	eng.ExpectSystemConfigByL2Hash(refA0.Hash, cfg.Genesis.SystemConfig, nil)
	l1F.ExpectL1BlockRefByNumber(refA.Number, refA, nil)
	l1F.ExpectL1BlockRefByHash(refA.Hash, refA, nil)
	l1F.ExpectL1BlockRefByHash(refA.Hash, refA, nil)

	prev := &fakeAttributesQueue{origin: refA, attrs: attrs}

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	eq := NewEngineQueue(logger, cfg, eng, metrics.NoopMetrics, prev, l1F, &sync.Config{})
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	eq.unsafeHead = refA2
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	eq.engineSyncTarget = refA2
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	eq.safeHead = refA1
	eq.finalized = refA0

	// Qeueue up the safe attributes
	require.Nil(t, eq.safeAttributes)
	require.ErrorIs(t, eq.Step(context.Background()), NotEnoughData)
	require.NotNil(t, eq.safeAttributes)

	// Peform the reset
	require.ErrorIs(t, eq.Reset(context.Background(), eth.L1BlockRef{}, eth.SystemConfig{}), io.EOF)

	// Expect a FCU after the reset
	preFc := &eth.ForkchoiceState{
		HeadBlockHash:      refA2.Hash,
		SafeBlockHash:      refA0.Hash,
		FinalizedBlockHash: refA0.Hash,
	}
	eng.ExpectForkchoiceUpdate(preFc, nil, nil, nil)
	require.NoError(t, eq.Step(context.Background()), "clean forkchoice state after reset")

	// Crux of the test. Should be in a valid state after the reset.
	require.ErrorIs(t, eq.Step(context.Background()), NotEnoughData, "Should be able to step after a reset")

	l1F.AssertExpectations(t)
	eng.AssertExpectations(t)
}
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func TestEngineQueue_StepPopOlderUnsafe(t *testing.T) {
	logger := testlog.Logger(t, log.LvlInfo)
	eng := &testutils.MockEngine{}
	l1F := &testutils.MockL1Source{}

	rng := rand.New(rand.NewSource(1234))

	refA := testutils.RandomBlockRef(rng)
	refA0 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         0,
		ParentHash:     common.Hash{},
		Time:           refA.Time,
		L1Origin:       refA.ID(),
		SequenceNumber: 0,
	}
	gasLimit := eth.Uint64Quantity(20_000_000)
	cfg := &rollup.Config{
		Genesis: rollup.Genesis{
			L1:     refA.ID(),
			L2:     refA0.ID(),
			L2Time: refA0.Time,
			SystemConfig: eth.SystemConfig{
				BatcherAddr: common.Address{42},
				Overhead:    [32]byte{123},
				Scalar:      [32]byte{42},
				GasLimit:    20_000_000,
			},
		},
		BlockTime:     1,
		SeqWindowSize: 2,
	}

	refA1 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refA0.Number + 1,
		ParentHash:     refA0.Hash,
		Time:           refA0.Time + cfg.BlockTime,
		L1Origin:       refA.ID(),
		SequenceNumber: 1,
	}
	refA2 := eth.L2BlockRef{
		Hash:           testutils.RandomHash(rng),
		Number:         refA1.Number + 1,
		ParentHash:     refA1.Hash,
		Time:           refA1.Time + cfg.BlockTime,
		L1Origin:       refA.ID(),
		SequenceNumber: 2,
	}
	payloadA1 := &eth.ExecutionPayload{
		ParentHash:    refA1.ParentHash,
		FeeRecipient:  common.Address{},
		StateRoot:     eth.Bytes32{},
		ReceiptsRoot:  eth.Bytes32{},
		LogsBloom:     eth.Bytes256{},
		PrevRandao:    eth.Bytes32{},
		BlockNumber:   eth.Uint64Quantity(refA1.Number),
		GasLimit:      gasLimit,
		GasUsed:       0,
		Timestamp:     eth.Uint64Quantity(refA1.Time),
		ExtraData:     nil,
		BaseFeePerGas: *uint256.NewInt(7),
		BlockHash:     refA1.Hash,
		Transactions:  []eth.Data{},
	}

	prev := &fakeAttributesQueue{origin: refA}

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	eq := NewEngineQueue(logger, cfg, eng, metrics.NoopMetrics, prev, l1F, &sync.Config{})
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	eq.unsafeHead = refA2
	eq.safeHead = refA0
	eq.finalized = refA0

	eq.AddUnsafePayload(payloadA1)

	err := eq.Step(context.Background())
	require.NoError(t, err)

	require.Nil(t, eq.unsafePayloads.Peek(), "should pop the unsafe payload because it is too old")
	fmt.Println(eq.unsafePayloads.Peek())

	l1F.AssertExpectations(t)
	eng.AssertExpectations(t)
}