feat(claimer): Make claim submission optional.

Makefile

@@ -78,6 +78,7 @@ env:
 	@echo export CARTESI_POSTGRES_ENDPOINT="postgres://postgres:password@localhost:5432/rollupsdb?sslmode=disable"
 	@echo export CARTESI_TEST_POSTGRES_ENDPOINT="postgres://test_user:password@localhost:5432/test_rollupsdb?sslmode=disable"
 	@echo export CARTESI_TEST_MACHINE_IMAGES_PATH=\"$(CARTESI_TEST_MACHINE_IMAGES_PATH)\"
+	@echo export CARTESI_FEATURE_CLAIMER_SUBMISSION_ENABLED=true
 	@echo export PATH=$(CURDIR):$$PATH
 
 # =============================================================================

cmd/cartesi-rollups-claimer/root/root.go

@@ -26,6 +26,7 @@ var (
 			TelemetryAddress:     ":8081",
 			Impl:                 &claimerService,
 		},
+		EnableSubmission: true,
 	}
 )
 
@@ -38,7 +39,6 @@ var Cmd = &cobra.Command{
 
 func init() {
 	c := config.FromEnv()
-	createInfo.Auth = c.Auth
 	createInfo.BlockchainHttpEndpoint = c.BlockchainHttpEndpoint
 	createInfo.PostgresEndpoint = c.PostgresEndpoint
 	createInfo.PollInterval = c.ClaimerPollingInterval
@@ -48,6 +48,10 @@ func init() {
 		slog.LevelWarn:  "warn",
 		slog.LevelError: "error",
 	}[c.LogLevel]
+	createInfo.EnableSubmission = c.FeatureClaimerSubmissionEnabled
+	if createInfo.EnableSubmission {
+		createInfo.Auth = c.Auth
+	}
 
 	Cmd.Flags().StringVar(&createInfo.TelemetryAddress,
 		"telemetry-address", createInfo.TelemetryAddress,
@@ -61,6 +65,9 @@ func init() {
 	Cmd.Flags().StringVar(&createInfo.LogLevel,
 		"log-level", createInfo.LogLevel,
 		"log level: debug, info, warn, error.")
+	Cmd.Flags().BoolVar(&createInfo.EnableSubmission,
+		"enable-submission", createInfo.EnableSubmission,
+		"enable submission in addition to verification.")
 }
 
 func run(cmd *cobra.Command, args []string) {

cmd/cartesi-rollups-node/root/root.go

@@ -30,14 +30,32 @@ var (
 		Long:  "Runs the Cartesi Rollups Node as a single process",
 		RunE:  run,
 	}
+	enableClaimSubmissionOverride bool
 )
 
+func init() {
+	Cmd.Flags().BoolVar(&enableClaimSubmissionOverride,
+		"enable-submission", true,
+		"enable submission in addition to verification.")
+}
+
 func run(cmd *cobra.Command, args []string) error {
 	startTime := time.Now()
 
 	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
 	defer stop()
 
+	// hack: change the environment variable according to the command line flag
+	// such that auth only gets loaded when claimer submission is enabled.
+	if cmd.Flags().Lookup("enable-submission").Changed {
+		var value string
+		if enableClaimSubmissionOverride {
+			value = "1"
+		} else {
+			value = "0"
+		}
+		os.Setenv("CARTESI_FEATURE_CLAIMER_SUBMISSION_ENABLED", value)
+	}
 	config := config.FromEnv()
 
 	// setup log

internal/claimer/claimer.go

@@ -28,6 +28,8 @@ type CreateInfo struct {
 
 	PostgresEndpoint Redacted[string]
 	DBConn           *Database
+
+	EnableSubmission bool
 }
 
 type claimKey struct {
@@ -38,10 +40,11 @@ type claimKey struct {
 type Service struct {
 	service.Service
 
-	DBConn         *Database
-	EthConn        *ethclient.Client
-	Signer         *bind.TransactOpts
-	ClaimsInFlight map[claimKey]Hash // -> txHash
+	submissionEnabled bool
+	DBConn            *Database
+	EthConn           *ethclient.Client
+	Signer            *bind.TransactOpts
+	ClaimsInFlight    map[claimKey]Hash // -> txHash
 }
 
 func Create(ci CreateInfo, s *Service) error {
@@ -52,6 +55,7 @@ func Create(ci CreateInfo, s *Service) error {
 		return err
 	}
 
+	s.submissionEnabled = ci.EnableSubmission
 	if s.EthConn == nil {
 		if ci.EthConn == nil {
 			ci.EthConn, err = ethclient.Dial(ci.BlockchainHttpEndpoint.Value)
@@ -76,7 +80,7 @@ func Create(ci CreateInfo, s *Service) error {
 		s.ClaimsInFlight = map[claimKey]Hash{}
 	}
 
-	if s.Signer == nil {
+	if s.Signer == nil && s.submissionEnabled {
 		if ci.Signer == nil {
 			ci.Signer, err = CreateSignerFromAuth(ci.Auth, s.Context, s.EthConn)
 			if err != nil {
@@ -234,7 +238,7 @@ func (s *Service) submitClaimsAndUpdateDatabase(se SideEffects) error {
 		}
 
 		// submit if not found in the logs (fetch from hash again, can be stale)
-		if claim, ok := computedClaimsMap[key]; ok {
+		if claim, ok := computedClaimsMap[key]; ok && s.submissionEnabled {
 			s.Logger.Info("Submitting claim to blockchain",
 				"app", claim.AppContractAddress,
 				"claim", claim.Hash,

internal/claimer/claimer_test.go

@@ -80,6 +80,7 @@ func newServiceMock() *ServiceMock {
 			Service: service.Service{
 				Logger: slog.Default(),
 			},
+			submissionEnabled: true,
 		},
 	}
 }
@@ -162,6 +163,45 @@ func TestSubmitNewClaim(t *testing.T) {
 	m.AssertNumberOfCalls(t, "updateEpochWithSubmittedClaim", 0)
 }
 
+// Got a claim, don't submit.
+func TestSubmitNewClaimDisabled(t *testing.T) {
+	m := newServiceMock()
+	m.submissionEnabled = false
+
+	newClaimHash := HexToHash("0x01")
+	newClaimTxHash := HexToHash("0x10")
+	newClaim := ComputedClaim{
+		Hash: newClaimHash,
+	}
+	m.ClaimsInFlight = map[claimKey]Hash{}
+	m.On("selectComputedClaims").Return([]ComputedClaim{
+		newClaim,
+	}, nil)
+	m.On("submitClaimToBlockchain", nil, nil, &newClaim).
+		Return(newClaimTxHash, nil)
+
+	itMock := &ClaimSubmissionIteratorMock{}
+	itMock.On("Next").Return(false)
+	itMock.On("Error").Return(nil)
+
+	m.On("enumerateSubmitClaimEventsSince").
+		Return(itMock, &iconsensus.IConsensus{}, nil)
+	m.On("pollTransaction", newClaimTxHash).
+		Return(false, &types.Receipt{}, nil)
+	assert.Equal(t, len(m.ClaimsInFlight), 0)
+
+	err := m.submitClaimsAndUpdateDatabase(m)
+	assert.Nil(t, err)
+
+	assert.Equal(t, len(m.ClaimsInFlight), 0)
+	m.AssertNumberOfCalls(t, "enumerateSubmitClaimEventsSince", 1)
+	m.AssertNumberOfCalls(t, "pollTransaction", 0)
+	m.AssertNumberOfCalls(t, "selectComputedClaims", 1)
+	m.AssertNumberOfCalls(t, "submitClaimToBlockchain", 0)
+	m.AssertNumberOfCalls(t, "updateEpochWithSubmittedClaim", 0)
+}
+
+
 // Query the blockchain for the submitClaim transaction, it may not be ready yet
 func TestClaimInFlightNotReadyDoesNothing(t *testing.T) {
 	m := newServiceMock()

internal/config/config.go

@@ -33,6 +33,7 @@ type NodeConfig struct {
 	HttpAddress                            string
 	HttpPort                               int
 	FeatureClaimerEnabled                  bool
+	FeatureClaimerSubmissionEnabled        bool
 	FeatureMachineHashCheckEnabled         bool
 	Auth                                   Auth
 	AdvancerPollingInterval                Duration
@@ -92,8 +93,9 @@ func FromEnv() NodeConfig {
 	config.HttpAddress = GetHttpAddress()
 	config.HttpPort = GetHttpPort()
 	config.FeatureClaimerEnabled = GetFeatureClaimerEnabled()
+	config.FeatureClaimerSubmissionEnabled = GetFeatureClaimerSubmissionEnabled()
 	config.FeatureMachineHashCheckEnabled = GetFeatureMachineHashCheckEnabled()
-	if config.FeatureClaimerEnabled {
+	if config.FeatureClaimerEnabled && config.FeatureClaimerSubmissionEnabled {
 		config.Auth = authFromEnv()
 	}
 	config.AdvancerPollingInterval = GetAdvancerPollingInterval()

internal/config/generate/Config.toml

@@ -25,6 +25,12 @@ go-type = "bool"
 description = """
 If set to false, the node will not make claims."""
 
+[features.CARTESI_FEATURE_CLAIMER_SUBMISSION_ENABLED]
+default = "true"
+go-type = "bool"
+description = """
+If set to false, the node will not submit claims."""
+
 [features.CARTESI_FEATURE_MACHINE_HASH_CHECK_ENABLED]
 default = "true"
 go-type = "bool"