feat(op-dispute-mon): Introduce the Extractor Component

op-dispute-mon/mon/extract/extractor.go

@@ -0,0 +1,60 @@
+package extract
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/log"
+
+	gameTypes "github.com/ethereum-optimism/optimism/op-challenger/game/types"
+	monTypes "github.com/ethereum-optimism/optimism/op-dispute-mon/mon/types"
+)
+
+type CreateGameCaller func(game gameTypes.GameMetadata) (GameCaller, error)
+type FactoryGameFetcher func(ctx context.Context, blockHash common.Hash, earliestTimestamp uint64) ([]gameTypes.GameMetadata, error)
+
+type Extractor struct {
+	logger         log.Logger
+	createContract CreateGameCaller
+	fetchGames     FactoryGameFetcher
+}
+
+func NewExtractor(logger log.Logger, creator CreateGameCaller, fetchGames FactoryGameFetcher) *Extractor {
+	return &Extractor{
+		logger:         logger,
+		createContract: creator,
+		fetchGames:     fetchGames,
+	}
+}
+
+func (e *Extractor) Extract(ctx context.Context, blockHash common.Hash, minTimestamp uint64) ([]monTypes.EnrichedGameData, error) {
+	games, err := e.fetchGames(ctx, blockHash, minTimestamp)
+	if err != nil {
+		return nil, fmt.Errorf("failed to load games: %w", err)
+	}
+	return e.enrichGameMetadata(ctx, games), nil
+}
+
+func (e *Extractor) enrichGameMetadata(ctx context.Context, games []gameTypes.GameMetadata) []monTypes.EnrichedGameData {
+	var enrichedGames []monTypes.EnrichedGameData
+	for _, game := range games {
+		caller, err := e.createContract(game)
+		if err != nil {
+			e.logger.Error("failed to create game caller", "err", err)
+			continue
+		}
+		l2BlockNum, rootClaim, status, err := caller.GetGameMetadata(ctx)
+		if err != nil {
+			e.logger.Error("failed to fetch game metadata", "err", err)
+			continue
+		}
+		enrichedGames = append(enrichedGames, monTypes.EnrichedGameData{
+			GameMetadata:  game,
+			L2BlockNumber: l2BlockNum,
+			RootClaim:     rootClaim,
+			Status:        status,
+		})
+	}
+	return enrichedGames
+}

op-dispute-mon/mon/extract/extractor_test.go

@@ -0,0 +1,139 @@
+package extract
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	faultTypes "github.com/ethereum-optimism/optimism/op-challenger/game/fault/types"
+	"github.com/ethereum-optimism/optimism/op-challenger/game/types"
+	gameTypes "github.com/ethereum-optimism/optimism/op-challenger/game/types"
+	"github.com/ethereum-optimism/optimism/op-service/testlog"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/log"
+)
+
+var mockRootClaim = common.HexToHash("0x1234")
+
+func TestExtractor_Extract(t *testing.T) {
+	t.Run("FetchGamesError", func(t *testing.T) {
+		extractor, _, games, _ := setupExtractorTest(t)
+		games.err = errors.New("boom")
+		_, err := extractor.Extract(context.Background(), common.Hash{}, 0)
+		require.ErrorIs(t, err, games.err)
+		require.Equal(t, 1, games.calls)
+	})
+
+	t.Run("CreateGameErrorLog", func(t *testing.T) {
+		extractor, creator, games, logs := setupExtractorTest(t)
+		games.games = []gameTypes.GameMetadata{{}}
+		creator.err = errors.New("boom")
+		enriched, err := extractor.Extract(context.Background(), common.Hash{}, 0)
+		require.NoError(t, err)
+		require.Len(t, enriched, 0)
+		require.Equal(t, 1, games.calls)
+		require.Equal(t, 1, creator.calls)
+		verifyLogs(t, logs, 1, 0)
+	})
+
+	t.Run("MetadataFetchErrorLog", func(t *testing.T) {
+		extractor, creator, games, logs := setupExtractorTest(t)
+		games.games = []gameTypes.GameMetadata{{}}
+		creator.caller.err = errors.New("boom")
+		enriched, err := extractor.Extract(context.Background(), common.Hash{}, 0)
+		require.NoError(t, err)
+		require.Len(t, enriched, 0)
+		require.Equal(t, 1, games.calls)
+		require.Equal(t, 1, creator.calls)
+		require.Equal(t, 1, creator.caller.calls)
+		verifyLogs(t, logs, 0, 1)
+	})
+
+	t.Run("Success", func(t *testing.T) {
+		extractor, creator, games, _ := setupExtractorTest(t)
+		games.games = []gameTypes.GameMetadata{{}}
+		enriched, err := extractor.Extract(context.Background(), common.Hash{}, 0)
+		require.NoError(t, err)
+		require.Len(t, enriched, 1)
+		require.Equal(t, 1, games.calls)
+		require.Equal(t, 1, creator.calls)
+		require.Equal(t, 1, creator.caller.calls)
+	})
+}
+
+func verifyLogs(t *testing.T, logs *testlog.CapturingHandler, createErr int, metadataErr int) {
+	errorLevelFilter := testlog.NewLevelFilter(log.LevelError)
+	createMessageFilter := testlog.NewMessageFilter("failed to create game caller")
+	l := logs.FindLogs(errorLevelFilter, createMessageFilter)
+	require.Len(t, l, createErr)
+	fetchMessageFilter := testlog.NewMessageFilter("failed to fetch game metadata")
+	l = logs.FindLogs(errorLevelFilter, fetchMessageFilter)
+	require.Len(t, l, metadataErr)
+}
+
+func setupExtractorTest(t *testing.T) (*Extractor, *mockGameCallerCreator, *mockGameFetcher, *testlog.CapturingHandler) {
+	logger, capturedLogs := testlog.CaptureLogger(t, log.LvlDebug)
+	games := &mockGameFetcher{}
+	caller := &mockGameCaller{rootClaim: mockRootClaim}
+	creator := &mockGameCallerCreator{caller: caller}
+	return NewExtractor(
+			logger,
+			creator.CreateGameCaller,
+			games.FetchGames,
+		),
+		creator,
+		games,
+		capturedLogs
+}
+
+type mockGameFetcher struct {
+	calls int
+	err   error
+	games []gameTypes.GameMetadata
+}
+
+func (m *mockGameFetcher) FetchGames(_ context.Context, _ common.Hash, _ uint64) ([]gameTypes.GameMetadata, error) {
+	m.calls++
+	if m.err != nil {
+		return nil, m.err
+	}
+	return m.games, nil
+}
+
+type mockGameCallerCreator struct {
+	calls  int
+	err    error
+	caller *mockGameCaller
+}
+
+func (m *mockGameCallerCreator) CreateGameCaller(_ gameTypes.GameMetadata) (GameCaller, error) {
+	m.calls++
+	if m.err != nil {
+		return nil, m.err
+	}
+	return m.caller, nil
+}
+
+type mockGameCaller struct {
+	calls     int
+	err       error
+	rootClaim common.Hash
+}
+
+func (m *mockGameCaller) GetGameMetadata(_ context.Context) (uint64, common.Hash, types.GameStatus, error) {
+	m.calls++
+	if m.err != nil {
+		return 0, common.Hash{}, 0, m.err
+	}
+	return 0, mockRootClaim, 0, nil
+}
+
+func (m *mockGameCaller) GetAllClaims(ctx context.Context) ([]faultTypes.Claim, error) {
+	m.calls++
+	if m.err != nil {
+		return nil, m.err
+	}
+	return []faultTypes.Claim{{}}, nil
+}

op-dispute-mon/mon/types/types.go

@@ -2,8 +2,16 @@ package types
 
 import (
 	"github.com/ethereum-optimism/optimism/op-challenger/game/types"
+	"github.com/ethereum/go-ethereum/common"
 )
 
+type EnrichedGameData struct {
+	types.GameMetadata
+	L2BlockNumber uint64
+	RootClaim     common.Hash
+	Status        types.GameStatus
+}
+
 type StatusBatch struct {
 	InProgress    int
 	DefenderWon   int