[Access] Fix event index bounds checking in Access APIs

cmd/access/node_builder/access_node_builder.go

@@ -279,6 +279,7 @@ type FlowAccessNodeBuilder struct {
 	ExecutionIndexerCore       *indexer.IndexerCore
 	ScriptExecutor             *backend.ScriptExecutor
 	RegistersAsyncStore        *execution.RegistersAsyncStore
+	EventsIndex                *backend.EventsIndex
 	IndexerDependencies        *cmd.DependencyList
 
 	// The sync engine participants provider is the libp2p peer store for the access node
@@ -773,11 +774,6 @@ func (builder *FlowAccessNodeBuilder) BuildExecutionSyncComponents() *FlowAccess
 					return nil, err
 				}
 
-				err = builder.RegistersAsyncStore.InitDataAvailable(registers)
-				if err != nil {
-					return nil, err
-				}
-
 				// setup requester to notify indexer when new execution data is received
 				execDataDistributor.AddOnExecutionDataReceivedConsumer(builder.ExecutionIndexer.OnExecutionData)
 
@@ -796,7 +792,20 @@ func (builder *FlowAccessNodeBuilder) BuildExecutionSyncComponents() *FlowAccess
 					return nil, err
 				}
 
-				builder.ScriptExecutor.InitReporter(builder.ExecutionIndexer, scripts)
+				err = builder.ScriptExecutor.Initialize(builder.ExecutionIndexer, scripts)
+				if err != nil {
+					return nil, err
+				}
+
+				err = builder.EventsIndex.Initialize(builder.ExecutionIndexer)
+				if err != nil {
+					return nil, err
+				}
+
+				err = builder.RegistersAsyncStore.Initialize(registers)
+				if err != nil {
+					return nil, err
+				}
 
 				return builder.ExecutionIndexer, nil
 			}, builder.IndexerDependencies)
@@ -837,7 +846,6 @@ func (builder *FlowAccessNodeBuilder) BuildExecutionSyncComponents() *FlowAccess
 				builder.stateStreamConf,
 				node.State,
 				node.Storage.Headers,
-				node.Storage.Events,
 				node.Storage.Seals,
 				node.Storage.Results,
 				builder.ExecutionDataStore,
@@ -846,6 +854,7 @@ func (builder *FlowAccessNodeBuilder) BuildExecutionSyncComponents() *FlowAccess
 				builder.executionDataConfig.InitialBlockHeight,
 				highestAvailableHeight,
 				builder.RegistersAsyncStore,
+				builder.EventsIndex,
 				useIndex,
 			)
 			if err != nil {
@@ -1445,6 +1454,10 @@ func (builder *FlowAccessNodeBuilder) Build() (cmd.Node, error) {
 			builder.Storage.Events = bstorage.NewEvents(node.Metrics.Cache, node.DB)
 			return nil
 		}).
+		Module("events index", func(node *cmd.NodeConfig) error {
+			builder.EventsIndex = backend.NewEventsIndex(builder.Storage.Events)
+			return nil
+		}).
 		Component("RPC engine", func(node *cmd.NodeConfig) (module.ReadyDoneAware, error) {
 			config := builder.rpcConf
 			backendConfig := config.BackendConfig
@@ -1496,7 +1509,6 @@ func (builder *FlowAccessNodeBuilder) Build() (cmd.Node, error) {
 				HistoricalAccessNodes:     builder.HistoricalAccessRPCs,
 				Blocks:                    node.Storage.Blocks,
 				Headers:                   node.Storage.Headers,
-				Events:                    node.Storage.Events,
 				Collections:               node.Storage.Collections,
 				Transactions:              node.Storage.Transactions,
 				ExecutionReceipts:         node.Storage.Receipts,
@@ -1516,6 +1528,7 @@ func (builder *FlowAccessNodeBuilder) Build() (cmd.Node, error) {
 				ScriptExecutor:            builder.ScriptExecutor,
 				ScriptExecutionMode:       scriptExecMode,
 				EventQueryMode:            eventQueryMode,
+				EventsIndex:               builder.EventsIndex,
 			})
 			if err != nil {
 				return nil, fmt.Errorf("could not initialize backend: %w", err)

engine/access/integration_unsecure_grpc_server_test.go

@@ -243,7 +243,6 @@ func (suite *SameGRPCPortTestSuite) SetupTest() {
 		conf,
 		suite.state,
 		suite.headers,
-		suite.events,
 		suite.seals,
 		suite.results,
 		nil,
@@ -252,6 +251,7 @@ func (suite *SameGRPCPortTestSuite) SetupTest() {
 		rootBlock.Header.Height,
 		rootBlock.Header.Height,
 		suite.registers,
+		backend.NewEventsIndex(suite.events),
 		false,
 	)
 	assert.NoError(suite.T(), err)

engine/access/rpc/backend/backend.go

@@ -83,7 +83,6 @@ type Params struct {
 	HistoricalAccessNodes     []accessproto.AccessAPIClient
 	Blocks                    storage.Blocks
 	Headers                   storage.Headers
-	Events                    storage.Events
 	Collections               storage.Collections
 	Transactions              storage.Transactions
 	ExecutionReceipts         storage.ExecutionReceipts
@@ -104,6 +103,7 @@ type Params struct {
 	ScriptExecutor            execution.ScriptExecutor
 	ScriptExecutionMode       IndexQueryMode
 	EventQueryMode            IndexQueryMode
+	EventsIndex               *EventsIndex
 }
 
 // New creates backend instance
@@ -183,12 +183,12 @@ func New(params Params) (*Backend, error) {
 			chain:             params.ChainID.Chain(),
 			state:             params.State,
 			headers:           params.Headers,
-			events:            params.Events,
 			executionReceipts: params.ExecutionReceipts,
 			connFactory:       params.ConnFactory,
 			maxHeightRange:    params.MaxHeightRange,
 			nodeCommunicator:  params.Communicator,
 			queryMode:         params.EventQueryMode,
+			eventsIndex:       params.EventsIndex,
 		},
 		backendBlockHeaders: backendBlockHeaders{
 			headers: params.Headers,

engine/access/rpc/backend/backend_accounts_test.go

@@ -15,7 +15,6 @@ import (
 	connectionmock "github.com/onflow/flow-go/engine/access/rpc/connection/mock"
 	"github.com/onflow/flow-go/engine/common/rpc/convert"
 	"github.com/onflow/flow-go/model/flow"
-	"github.com/onflow/flow-go/module/execution"
 	execmock "github.com/onflow/flow-go/module/execution/mock"
 	"github.com/onflow/flow-go/module/irrecoverable"
 	protocol "github.com/onflow/flow-go/state/protocol/mock"
@@ -222,7 +221,7 @@ func (s *BackendAccountsSuite) TestGetAccountFromStorage_Fails() {
 		statusCode codes.Code
 	}{
 		{
-			err:        execution.ErrDataNotAvailable,
+			err:        storage.ErrHeightNotIndexed,
 			statusCode: codes.OutOfRange,
 		},
 		{
@@ -267,7 +266,7 @@ func (s *BackendAccountsSuite) TestGetAccountFromFailover_HappyPath() {
 	backend.scriptExecMode = IndexQueryModeFailover
 	backend.scriptExecutor = scriptExecutor
 
-	for _, errToReturn := range []error{execution.ErrDataNotAvailable, storage.ErrNotFound} {
+	for _, errToReturn := range []error{storage.ErrHeightNotIndexed, storage.ErrNotFound} {
 		scriptExecutor.On("GetAccountAtBlockHeight", mock.Anything, s.account.Address, s.block.Header.Height).
 			Return(nil, errToReturn).Times(3)
 
@@ -299,7 +298,7 @@ func (s *BackendAccountsSuite) TestGetAccountFromFailover_ReturnsENErrors() {
 
 	scriptExecutor := execmock.NewScriptExecutor(s.T())
 	scriptExecutor.On("GetAccountAtBlockHeight", mock.Anything, s.failingAddress, s.block.Header.Height).
-		Return(nil, execution.ErrDataNotAvailable)
+		Return(nil, storage.ErrHeightNotIndexed)
 
 	backend := s.defaultBackend()
 	backend.scriptExecMode = IndexQueryModeFailover

engine/access/rpc/backend/backend_events.go

@@ -21,13 +21,13 @@ import (
 	"github.com/onflow/flow-go/model/events"
 	"github.com/onflow/flow-go/model/flow"
 	"github.com/onflow/flow-go/module/irrecoverable"
+	"github.com/onflow/flow-go/module/state_synchronization/indexer"
 	"github.com/onflow/flow-go/state/protocol"
 	"github.com/onflow/flow-go/storage"
 )
 
 type backendEvents struct {
 	headers           storage.Headers
-	events            storage.Events
 	executionReceipts storage.ExecutionReceipts
 	state             protocol.State
 	chain             flow.Chain
@@ -36,6 +36,7 @@ type backendEvents struct {
 	maxHeightRange    uint
 	nodeCommunicator  Communicator
 	queryMode         IndexQueryMode
+	eventsIndex       *EventsIndex
 }
 
 // blockMetadata is used to capture information about requested blocks to avoid repeated blockID
@@ -226,15 +227,17 @@ func (b *backendEvents) getBlockEventsFromStorage(
 ) ([]flow.BlockEvents, []blockMetadata, error) {
 	missing := make([]blockMetadata, 0)
 	resp := make([]flow.BlockEvents, 0)
+
 	for _, blockInfo := range blockInfos {
 		if ctx.Err() != nil {
 			return nil, nil, rpc.ConvertError(ctx.Err(), "failed to get events from storage", codes.Canceled)
 		}
 
-		events, err := b.events.ByBlockID(blockInfo.ID)
+		events, err := b.eventsIndex.GetEvents(blockInfo.ID, blockInfo.Height)
 		if err != nil {
-			// Note: if there are no events for a block, an empty slice is returned
-			if errors.Is(err, storage.ErrNotFound) {
+			if errors.Is(err, storage.ErrNotFound) ||
+				errors.Is(err, storage.ErrHeightNotIndexed) ||
+				errors.Is(err, indexer.ErrIndexNotInitialized) {
 				missing = append(missing, blockInfo)
 				continue
 			}

engine/access/rpc/backend/backend_events_test.go

@@ -21,6 +21,7 @@ import (
 	"github.com/onflow/flow-go/engine/common/rpc/convert"
 	"github.com/onflow/flow-go/model/flow"
 	"github.com/onflow/flow-go/module/irrecoverable"
+	syncmock "github.com/onflow/flow-go/module/state_synchronization/mock"
 	protocol "github.com/onflow/flow-go/state/protocol/mock"
 	"github.com/onflow/flow-go/storage"
 	storagemock "github.com/onflow/flow-go/storage/mock"
@@ -44,6 +45,7 @@ type BackendEventsSuite struct {
 	params     *protocol.Params
 	rootHeader *flow.Header
 
+	eventsIndex       *EventsIndex
 	events            *storagemock.Events
 	headers           *storagemock.Headers
 	receipts          *storagemock.ExecutionReceipts
@@ -79,6 +81,7 @@ func (s *BackendEventsSuite) SetupTest() {
 
 	s.execClient = access.NewExecutionAPIClient(s.T())
 	s.executionNodes = unittest.IdentityListFixture(2, unittest.WithRole(flow.RoleExecution))
+	s.eventsIndex = NewEventsIndex(s.events)
 
 	blockCount := 5
 	s.blocks = make([]*flow.Block, blockCount)
@@ -163,13 +166,13 @@ func (s *BackendEventsSuite) defaultBackend() *backendEvents {
 		log:               s.log,
 		chain:             s.chainID.Chain(),
 		state:             s.state,
-		events:            s.events,
 		headers:           s.headers,
 		executionReceipts: s.receipts,
 		connFactory:       s.connectionFactory,
 		nodeCommunicator:  NewNodeCommunicator(false),
 		maxHeightRange:    DefaultMaxHeightRange,
 		queryMode:         IndexQueryModeExecutionNodesOnly,
+		eventsIndex:       s.eventsIndex,
 	}
 }
 
@@ -250,6 +253,12 @@ func (s *BackendEventsSuite) TestGetEvents_HappyPaths() {
 	startHeight := s.blocks[0].Header.Height
 	endHeight := s.sealedHead.Height
 
+	reporter := syncmock.NewIndexReporter(s.T())
+	reporter.On("LowestIndexedHeight").Return(startHeight, nil)
+	reporter.On("HighestIndexedHeight").Return(endHeight+10, nil)
+	err := s.eventsIndex.Initialize(reporter)
+	s.Require().NoError(err)
+
 	s.state.On("Sealed").Return(s.snapshot)
 	s.snapshot.On("Head").Return(s.sealedHead, nil)
 
@@ -289,6 +298,7 @@ func (s *BackendEventsSuite) TestGetEvents_HappyPaths() {
 
 		s.Run(fmt.Sprintf("all from en - %s - %s", tt.encoding.String(), tt.queryMode), func() {
 			events := storagemock.NewEvents(s.T())
+			eventsIndex := NewEventsIndex(events)
 
 			switch tt.queryMode {
 			case IndexQueryModeLocalOnly:
@@ -298,12 +308,12 @@ func (s *BackendEventsSuite) TestGetEvents_HappyPaths() {
 				// only calls to EN, no calls to storage
 			case IndexQueryModeFailover:
 				// all calls to storage fail
-				events.On("ByBlockID", mock.Anything).Return(nil, storage.ErrNotFound)
+				// simulated by not initializing the eventIndex so all calls return ErrIndexNotInitialized
 			}
 
 			backend := s.defaultBackend()
 			backend.queryMode = tt.queryMode
-			backend.events = events
+			backend.eventsIndex = eventsIndex
 
 			s.setupENSuccessResponse(targetEvent, s.blocks)
 
@@ -318,26 +328,32 @@ func (s *BackendEventsSuite) TestGetEvents_HappyPaths() {
 
 		s.Run(fmt.Sprintf("mixed storage & en - %s - %s", tt.encoding.String(), tt.queryMode), func() {
 			events := storagemock.NewEvents(s.T())
+			eventsIndex := NewEventsIndex(events)
 
 			switch tt.queryMode {
 			case IndexQueryModeLocalOnly, IndexQueryModeExecutionNodesOnly:
 				// not applicable
 				return
 			case IndexQueryModeFailover:
 				// only failing blocks queried from EN
-				s.setupENSuccessResponse(targetEvent, s.blocks[0:2])
+				s.setupENSuccessResponse(targetEvent, []*flow.Block{s.blocks[0], s.blocks[4]})
 			}
 
-			// the first 2 blocks are not available from storage, and should be fetched from the EN
-			events.On("ByBlockID", s.blockIDs[0]).Return(nil, storage.ErrNotFound)
-			events.On("ByBlockID", s.blockIDs[1]).Return(nil, storage.ErrNotFound)
+			// the first and last blocks are not available from storage, and should be fetched from the EN
+			reporter := syncmock.NewIndexReporter(s.T())
+			reporter.On("LowestIndexedHeight").Return(s.blocks[1].Header.Height, nil)
+			reporter.On("HighestIndexedHeight").Return(s.blocks[3].Header.Height, nil)
+
+			events.On("ByBlockID", s.blockIDs[1]).Return(s.blockEvents, nil)
 			events.On("ByBlockID", s.blockIDs[2]).Return(s.blockEvents, nil)
 			events.On("ByBlockID", s.blockIDs[3]).Return(s.blockEvents, nil)
-			events.On("ByBlockID", s.blockIDs[4]).Return(s.blockEvents, nil)
+
+			err := eventsIndex.Initialize(reporter)
+			s.Require().NoError(err)
 
 			backend := s.defaultBackend()
 			backend.queryMode = tt.queryMode
-			backend.events = events
+			backend.eventsIndex = eventsIndex
 
 			response, err := backend.GetEventsForBlockIDs(ctx, targetEvent, s.blockIDs, tt.encoding)
 			s.Require().NoError(err)

engine/access/rpc/backend/backend_scripts.go

@@ -19,6 +19,7 @@ import (
 	"github.com/onflow/flow-go/module"
 	"github.com/onflow/flow-go/module/execution"
 	"github.com/onflow/flow-go/module/irrecoverable"
+	"github.com/onflow/flow-go/module/state_synchronization/indexer"
 	"github.com/onflow/flow-go/state/protocol"
 	"github.com/onflow/flow-go/storage"
 	"github.com/onflow/flow-go/utils/logging"
@@ -362,7 +363,11 @@ func convertIndexError(err error, height uint64, defaultMsg string) error {
 		return nil
 	}
 
-	if errors.Is(err, execution.ErrDataNotAvailable) {
+	if errors.Is(err, indexer.ErrIndexNotInitialized) {
+		return status.Errorf(codes.FailedPrecondition, "data for block is not available: %v", err)
+	}
+
+	if errors.Is(err, storage.ErrHeightNotIndexed) {
 		return status.Errorf(codes.OutOfRange, "data for block height %d is not available", height)
 	}
 

engine/access/rpc/backend/backend_scripts_test.go

@@ -20,7 +20,6 @@ import (
 	connectionmock "github.com/onflow/flow-go/engine/access/rpc/connection/mock"
 	fvmerrors "github.com/onflow/flow-go/fvm/errors"
 	"github.com/onflow/flow-go/model/flow"
-	"github.com/onflow/flow-go/module/execution"
 	execmock "github.com/onflow/flow-go/module/execution/mock"
 	"github.com/onflow/flow-go/module/irrecoverable"
 	"github.com/onflow/flow-go/module/metrics"
@@ -243,7 +242,7 @@ func (s *BackendScriptsSuite) TestExecuteScriptFromStorage_Fails() {
 		statusCode codes.Code
 	}{
 		{
-			err:        execution.ErrDataNotAvailable,
+			err:        storage.ErrHeightNotIndexed,
 			statusCode: codes.OutOfRange,
 		},
 		{
@@ -288,7 +287,7 @@ func (s *BackendScriptsSuite) TestExecuteScriptWithFailover_HappyPath() {
 	ctx := context.Background()
 
 	errors := []error{
-		execution.ErrDataNotAvailable,
+		storage.ErrHeightNotIndexed,
 		storage.ErrNotFound,
 		fmt.Errorf("system error"),
 		fvmFailureErr,
@@ -383,7 +382,7 @@ func (s *BackendScriptsSuite) TestExecuteScriptWithFailover_ReturnsENErrors() {
 	// configure local script executor to fail
 	scriptExecutor := execmock.NewScriptExecutor(s.T())
 	scriptExecutor.On("ExecuteAtBlockHeight", mock.Anything, mock.Anything, mock.Anything, s.block.Header.Height).
-		Return(nil, execution.ErrDataNotAvailable)
+		Return(nil, storage.ErrHeightNotIndexed)
 
 	backend := s.defaultBackend()
 	backend.scriptExecMode = IndexQueryModeFailover