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package driver
import (
"context"
"errors"
"fmt"
"io"
"testing"
"github.com/ethereum-optimism/optimism/op-node/rollup/derive"
"github.com/ethereum-optimism/optimism/op-service/eth"
"github.com/ethereum-optimism/optimism/op-service/testlog"
"github.com/ethereum/go-ethereum/log"
"github.com/stretchr/testify/require"
)
func TestDerivationComplete(t *testing.T) {
driver := createDriver(t, fmt.Errorf("derivation complete: %w", io.EOF))
err := driver.Step(context.Background())
require.ErrorIs(t, err, io.EOF)
}
func TestTemporaryError(t *testing.T) {
driver := createDriver(t, fmt.Errorf("whoopsie: %w", derive.ErrTemporary))
err := driver.Step(context.Background())
require.NoError(t, err, "should allow derivation to continue after temporary error")
}
func TestNotEnoughDataError(t *testing.T) {
driver := createDriver(t, fmt.Errorf("idk: %w", derive.NotEnoughData))
err := driver.Step(context.Background())
require.NoError(t, err)
}
func TestGenericError(t *testing.T) {
expected := errors.New("boom")
driver := createDriver(t, expected)
err := driver.Step(context.Background())
require.ErrorIs(t, err, expected)
}
func TestTargetBlock(t *testing.T) {
t.Run("Reached", func(t *testing.T) {
driver := createDriverWithNextBlock(t, derive.NotEnoughData, 1000)
driver.targetBlockNum = 1000
err := driver.Step(context.Background())
require.ErrorIs(t, err, io.EOF)
})
t.Run("Exceeded", func(t *testing.T) {
driver := createDriverWithNextBlock(t, derive.NotEnoughData, 1000)
driver.targetBlockNum = 500
err := driver.Step(context.Background())
require.ErrorIs(t, err, io.EOF)
})
t.Run("NotYetReached", func(t *testing.T) {
driver := createDriverWithNextBlock(t, derive.NotEnoughData, 1000)
driver.targetBlockNum = 1001
err := driver.Step(context.Background())
// No error to indicate derivation should continue
require.NoError(t, err)
})
}
func TestNoError(t *testing.T) {
driver := createDriver(t, nil)
err := driver.Step(context.Background())
require.NoError(t, err)
}
func TestValidateClaim(t *testing.T) {
t.Run("Valid", func(t *testing.T) {
driver := createDriver(t, io.EOF)
expected := eth.Bytes32{0x11}
driver.l2OutputRoot = func(_ uint64) (eth.Bytes32, error) {
return expected, nil
}
err := driver.ValidateClaim(uint64(0), expected)
require.NoError(t, err)
})
t.Run("Valid-PriorToSafeHead", func(t *testing.T) {
driver := createDriverWithNextBlock(t, io.EOF, 10)
expected := eth.Bytes32{0x11}
requestedOutputRoot := uint64(0)
driver.l2OutputRoot = func(blockNum uint64) (eth.Bytes32, error) {
requestedOutputRoot = blockNum
return expected, nil
}
err := driver.ValidateClaim(uint64(20), expected)
require.NoError(t, err)
require.Equal(t, uint64(10), requestedOutputRoot)
})
t.Run("Invalid", func(t *testing.T) {
driver := createDriver(t, io.EOF)
driver.l2OutputRoot = func(_ uint64) (eth.Bytes32, error) {
return eth.Bytes32{0x22}, nil
}
err := driver.ValidateClaim(uint64(0), eth.Bytes32{0x11})
require.ErrorIs(t, err, ErrClaimNotValid)
})
t.Run("Invalid-PriorToSafeHead", func(t *testing.T) {
driver := createDriverWithNextBlock(t, io.EOF, 10)
expected := eth.Bytes32{0x11}
requestedOutputRoot := uint64(0)
driver.l2OutputRoot = func(blockNum uint64) (eth.Bytes32, error) {
requestedOutputRoot = blockNum
return expected, nil
}
err := driver.ValidateClaim(uint64(20), eth.Bytes32{0x55})
require.ErrorIs(t, err, ErrClaimNotValid)
require.Equal(t, uint64(10), requestedOutputRoot)
})
t.Run("Error", func(t *testing.T) {
driver := createDriver(t, io.EOF)
expectedErr := errors.New("boom")
driver.l2OutputRoot = func(_ uint64) (eth.Bytes32, error) {
return eth.Bytes32{}, expectedErr
}
err := driver.ValidateClaim(uint64(0), eth.Bytes32{0x11})
require.ErrorIs(t, err, expectedErr)
})
}
func createDriver(t *testing.T, derivationResult error) *Driver {
return createDriverWithNextBlock(t, derivationResult, 0)
}
func createDriverWithNextBlock(t *testing.T, derivationResult error, nextBlockNum uint64) *Driver {
derivation := &stubDeriver{nextErr: derivationResult, nextBlockNum: nextBlockNum}
return &Driver{
logger: testlog.Logger(t, log.LevelDebug),
deriver: derivation,
l2OutputRoot: nil,
targetBlockNum: 1_000_000,
}
}
type stubDeriver struct {
nextErr error
nextBlockNum uint64
}
func (s *stubDeriver) SyncStep(ctx context.Context) error {
return s.nextErr
}
func (s *stubDeriver) SafeL2Head() eth.L2BlockRef {
return eth.L2BlockRef{
Number: s.nextBlockNum,
}
}