diff --git a/bindings/encoding/struct.go b/bindings/encoding/struct.go
index 1cfe974bf..e230bb94e 100644
--- a/bindings/encoding/struct.go
+++ b/bindings/encoding/struct.go
@@ -10,15 +10,17 @@ import (
 
 // Tier IDs defined in protocol.
 var (
-	TierOptimisticID uint16 = 100
-	TierSgxID        uint16 = 200
-	TierSgxAndZkVMID uint16 = 300
-	TierGuardianID   uint16 = 1000
-	ProtocolTiers           = []uint16{
+	TierOptimisticID       uint16 = 100
+	TierSgxID              uint16 = 200
+	TierSgxAndZkVMID       uint16 = 300
+	TierGuardianMinorityID uint16 = 900
+	TierGuardianMajorityID uint16 = 1000
+	ProtocolTiers                 = []uint16{
 		TierOptimisticID,
 		TierSgxID,
 		TierSgxAndZkVMID,
-		TierGuardianID,
+		TierGuardianMinorityID,
+		TierGuardianMajorityID,
 	}
 	GoldenTouchPrivKey = "92954368afd3caa1f3ce3ead0069c1af414054aefe1ef9aeacc1bf426222ce38"
 )
diff --git a/cmd/flags/prover.go b/cmd/flags/prover.go
index 0e533270f..f8d9b861e 100644
--- a/cmd/flags/prover.go
+++ b/cmd/flags/prover.go
@@ -3,6 +3,7 @@ package flags
 import (
 	"time"
 
+	"github.com/taikoxyz/taiko-client/pkg/rpc"
 	"github.com/urfave/cli/v2"
 )
 
@@ -164,11 +165,18 @@ var (
 		EnvVars:  []string{"PROVER_GUARDIAN_PROVER_HEALTH_CHECK_SERVER_ENDPOINT"},
 	}
 	// Guardian prover specific flag
-	GuardianProver = &cli.StringFlag{
-		Name:     "guardianProver",
-		Usage:    "GuardianProver contract `address`",
+	GuardianProverMinority = &cli.StringFlag{
+		Name:     "guardianProverMinority",
+		Usage:    "GuardianProverMinority contract `address`",
+		Value:    rpc.ZeroAddress.Hex(),
 		Category: proverCategory,
-		EnvVars:  []string{"GUARDIAN_PROVER"},
+		EnvVars:  []string{"GUARDIAN_PROVER_MINORITY"},
+	}
+	GuardianProverMajority = &cli.StringFlag{
+		Name:     "guardianProverMajority",
+		Usage:    "GuardianProverMajority contract `address`",
+		Category: proverCategory,
+		EnvVars:  []string{"GUARDIAN_PROVER_MAJORITY"},
 	}
 	GuardianProofSubmissionDelay = &cli.DurationFlag{
 		Name:     "guardian.submissionDelay",
@@ -224,7 +232,8 @@ var ProverFlags = MergeFlags(CommonFlags, []cli.Flag{
 	MinTaikoTokenBalance,
 	StartingBlockID,
 	Dummy,
-	GuardianProver,
+	GuardianProverMinority,
+	GuardianProverMajority,
 	GuardianProofSubmissionDelay,
 	GuardianProverHealthCheckServerEndpoint,
 	Graffiti,
diff --git a/proposer/proposer.go b/proposer/proposer.go
index cbbcbf6fd..bbd0e1c2e 100644
--- a/proposer/proposer.go
+++ b/proposer/proposer.go
@@ -433,7 +433,7 @@ func (p *Proposer) initTierFees() error {
 			p.tierFees = append(p.tierFees, encoding.TierFee{Tier: tier.ID, Fee: p.OptimisticTierFee})
 		case encoding.TierSgxID:
 			p.tierFees = append(p.tierFees, encoding.TierFee{Tier: tier.ID, Fee: p.SgxTierFee})
-		case encoding.TierGuardianID:
+		case encoding.TierGuardianMajorityID:
 			// Guardian prover should not charge any fee.
 			p.tierFees = append(p.tierFees, encoding.TierFee{Tier: tier.ID, Fee: common.Big0})
 		default:
diff --git a/prover/config.go b/prover/config.go
index fc3150a0f..ddc1cc096 100644
--- a/prover/config.go
+++ b/prover/config.go
@@ -33,7 +33,8 @@ type Config struct {
 	L1ProverPrivKey                         *ecdsa.PrivateKey
 	StartingBlockID                         *big.Int
 	Dummy                                   bool
-	GuardianProverAddress                   common.Address
+	GuardianProverMinorityAddress           common.Address
+	GuardianProverMajorityAddress           common.Address
 	GuardianProofSubmissionDelay            time.Duration
 	Graffiti                                string
 	BackOffMaxRetries                       uint64
@@ -101,7 +102,7 @@ func NewConfigFromCliContext(c *cli.Context) (*Config, error) {
 	}
 
 	// If we are running a guardian prover, we need to prove unassigned blocks and run in contester mode by default.
-	if c.IsSet(flags.GuardianProver.Name) {
+	if c.IsSet(flags.GuardianProverMajority.Name) {
 		if err := c.Set(flags.ProveUnassignedBlocks.Name, "true"); err != nil {
 			return nil, err
 		}
@@ -119,7 +120,7 @@ func NewConfigFromCliContext(c *cli.Context) (*Config, error) {
 	}
 
 	// If we are not running a guardian prover, a raiko host endpoint is required.
-	if !c.IsSet(flags.GuardianProver.Name) && !c.IsSet(flags.RaikoHostEndpoint.Name) {
+	if !c.IsSet(flags.GuardianProverMajority.Name) && !c.IsSet(flags.RaikoHostEndpoint.Name) {
 		return nil, errors.New("raiko host not provided")
 	}
 
@@ -180,7 +181,8 @@ func NewConfigFromCliContext(c *cli.Context) (*Config, error) {
 		RaikoL2Endpoint:                         raikoL2Endpoint,
 		StartingBlockID:                         startingBlockID,
 		Dummy:                                   c.Bool(flags.Dummy.Name),
-		GuardianProverAddress:                   common.HexToAddress(c.String(flags.GuardianProver.Name)),
+		GuardianProverMinorityAddress:           common.HexToAddress(c.String(flags.GuardianProverMinority.Name)),
+		GuardianProverMajorityAddress:           common.HexToAddress(c.String(flags.GuardianProverMajority.Name)),
 		GuardianProofSubmissionDelay:            c.Duration(flags.GuardianProofSubmissionDelay.Name),
 		GuardianProverHealthCheckServerEndpoint: guardianProverHealthCheckServerEndpoint,
 		Graffiti:                                c.String(flags.Graffiti.Name),
diff --git a/prover/config_test.go b/prover/config_test.go
index 3d8da7f1d..69d6dff72 100644
--- a/prover/config_test.go
+++ b/prover/config_test.go
@@ -84,7 +84,7 @@ func (s *ProverTestSuite) TestNewConfigFromCliContextGuardianProver() {
 		"--" + flags.MinOptimisticTierFee.Name, fmt.Sprint(minTierFee),
 		"--" + flags.MinSgxTierFee.Name, fmt.Sprint(minTierFee),
 		"--" + flags.ProverCapacity.Name, "8",
-		"--" + flags.GuardianProver.Name, os.Getenv("GUARDIAN_PROVER_CONTRACT_ADDRESS"),
+		"--" + flags.GuardianProverMajority.Name, os.Getenv("GUARDIAN_PROVER_CONTRACT_ADDRESS"),
 		"--" + flags.AssignmentHookAddress.Name, os.Getenv("ASSIGNMENT_HOOK_ADDRESS"),
 		"--" + flags.Graffiti.Name, "",
 		"--" + flags.ProveUnassignedBlocks.Name,
@@ -117,7 +117,7 @@ func (s *ProverTestSuite) SetupApp() *cli.App {
 		&cli.StringFlag{Name: flags.L1ProverPrivKey.Name},
 		&cli.Uint64Flag{Name: flags.StartingBlockID.Name},
 		&cli.BoolFlag{Name: flags.Dummy.Name},
-		&cli.StringFlag{Name: flags.GuardianProver.Name},
+		&cli.StringFlag{Name: flags.GuardianProverMajority.Name},
 		&cli.StringFlag{Name: flags.Graffiti.Name},
 		&cli.BoolFlag{Name: flags.ProveUnassignedBlocks.Name},
 		&cli.DurationFlag{Name: flags.RPCTimeout.Name},
diff --git a/prover/event_handler/block_proposed.go b/prover/event_handler/block_proposed.go
index 7192be5a2..492180d51 100644
--- a/prover/event_handler/block_proposed.go
+++ b/prover/event_handler/block_proposed.go
@@ -43,8 +43,9 @@ type BlockProposedEventHandler struct {
 	backOffMaxRetrys      uint64
 	contesterMode         bool
 	proveUnassignedBlocks bool
-	tierToOverride        uint16
-	submissionDelay       time.Duration
+	// Guardian prover related.
+	isGuardian      bool
+	submissionDelay time.Duration
 }
 
 // NewBlockProposedEventHandlerOps is the options for creating a new BlockProposedEventHandler.
@@ -79,7 +80,7 @@ func NewBlockProposedEventHandler(opts *NewBlockProposedEventHandlerOps) *BlockP
 		opts.BackOffMaxRetrys,
 		opts.ContesterMode,
 		opts.ProveUnassignedBlocks,
-		0,
+		false,
 		opts.SubmissionDelay,
 	}
 }
@@ -347,8 +348,8 @@ func (h *BlockProposedEventHandler) checkExpirationAndSubmitProof(
 		return err
 	}
 
-	if h.tierToOverride != 0 {
-		tier = h.tierToOverride
+	if h.isGuardian {
+		tier = encoding.TierGuardianMinorityID
 	}
 
 	log.Info(
@@ -388,8 +389,7 @@ func NewBlockProposedEventGuardianHandler(
 	opts *NewBlockProposedGuardianEventHandlerOps,
 ) *BlockProposedGuaridanEventHandler {
 	blockProposedEventHandler := NewBlockProposedEventHandler(opts.NewBlockProposedEventHandlerOps)
-	// For guardian provers, we only send top tier proofs.
-	blockProposedEventHandler.tierToOverride = encoding.TierGuardianID
+	blockProposedEventHandler.isGuardian = true
 
 	return &BlockProposedGuaridanEventHandler{
 		BlockProposedEventHandler: blockProposedEventHandler,
diff --git a/prover/event_handler/util_test.go b/prover/event_handler/util_test.go
index 3e34b5d35..5c2e19965 100644
--- a/prover/event_handler/util_test.go
+++ b/prover/event_handler/util_test.go
@@ -20,7 +20,7 @@ type ProverEventHandlerTestSuite struct {
 func (s *ProverEventHandlerTestSuite) TestGetProvingWindowNotFound() {
 	_, err := getProvingWindow(&bindings.TaikoL1ClientBlockProposed{
 		Meta: bindings.TaikoDataBlockMetadata{
-			MinTier: encoding.TierGuardianID + 1,
+			MinTier: encoding.TierGuardianMajorityID + 1,
 		},
 	}, []*rpc.TierProviderTierWithID{})
 	s.ErrorIs(err, errTierNotFound)
diff --git a/prover/init.go b/prover/init.go
index 45c8244b8..872bca02e 100644
--- a/prover/init.go
+++ b/prover/init.go
@@ -112,7 +112,7 @@ func (p *Prover) initProofSubmitters(
 				L2Endpoint:        p.cfg.RaikoL2Endpoint,
 				Dummy:             p.cfg.Dummy,
 			}
-		case encoding.TierGuardianID:
+		case encoding.TierGuardianMajorityID:
 			producer = proofProducer.NewGuardianProofProducer(p.cfg.EnableLivenessBondProof)
 		default:
 			return fmt.Errorf("unsupported tier: %d", tier.ID)
diff --git a/prover/proof_producer/guardian_producer.go b/prover/proof_producer/guardian_producer.go
index d638ef1da..2d79e76d4 100644
--- a/prover/proof_producer/guardian_producer.go
+++ b/prover/proof_producer/guardian_producer.go
@@ -56,5 +56,5 @@ func (g *GuardianProofProducer) RequestProof(
 
 // Tier implements the ProofProducer interface.
 func (g *GuardianProofProducer) Tier() uint16 {
-	return encoding.TierGuardianID
+	return encoding.TierGuardianMajorityID
 }
diff --git a/prover/proof_producer/guardian_producer_test.go b/prover/proof_producer/guardian_producer_test.go
index a6e6b6d86..665b20684 100644
--- a/prover/proof_producer/guardian_producer_test.go
+++ b/prover/proof_producer/guardian_producer_test.go
@@ -47,7 +47,7 @@ func TestGuardianProducerRequestProof(t *testing.T) {
 
 	require.Equal(t, res.BlockID, blockID)
 	require.Equal(t, res.Header, header)
-	require.Equal(t, res.Tier, encoding.TierGuardianID)
+	require.Equal(t, res.Tier, encoding.TierGuardianMajorityID)
 	require.NotEmpty(t, res.Proof)
 }
 
@@ -84,7 +84,7 @@ func TestGuardianProducerRequestProofReturnLivenessBond(t *testing.T) {
 
 	require.Equal(t, res.BlockID, blockID)
 	require.Equal(t, res.Header, header)
-	require.Equal(t, res.Tier, encoding.TierGuardianID)
+	require.Equal(t, res.Tier, encoding.TierGuardianMajorityID)
 	require.NotEmpty(t, res.Proof)
 	require.Equal(t, res.Proof, crypto.Keccak256([]byte("RETURN_LIVENESS_BOND")))
 }
diff --git a/prover/proof_submitter/proof_submitter.go b/prover/proof_submitter/proof_submitter.go
index c8b015d9f..699081c84 100644
--- a/prover/proof_submitter/proof_submitter.go
+++ b/prover/proof_submitter/proof_submitter.go
@@ -170,7 +170,7 @@ func (s *ProofSubmitter) SubmitProof(
 				Tier: proofWithHeader.Tier,
 				Data: proofWithHeader.Proof,
 			},
-			proofWithHeader.Tier == encoding.TierGuardianID,
+			proofWithHeader.Tier == encoding.TierGuardianMajorityID,
 		),
 	); err != nil {
 		if err.Error() == transaction.ErrUnretryableSubmission.Error() {
diff --git a/prover/proof_submitter/proof_submitter_test.go b/prover/proof_submitter/proof_submitter_test.go
index f6d8413f8..bec106b32 100644
--- a/prover/proof_submitter/proof_submitter_test.go
+++ b/prover/proof_submitter/proof_submitter_test.go
@@ -192,7 +192,7 @@ func (s *ProofSubmitterTestSuite) TestGuardianSubmitProofs() {
 	for _, e := range events {
 		s.Nil(s.submitter.RequestProof(context.Background(), e))
 		proofWithHeader := <-s.proofCh
-		proofWithHeader.Tier = encoding.TierGuardianID
+		proofWithHeader.Tier = encoding.TierGuardianMajorityID
 		s.Nil(s.submitter.SubmitProof(context.Background(), proofWithHeader))
 	}
 }
diff --git a/prover/prover.go b/prover/prover.go
index d630a115d..e67f4240c 100644
--- a/prover/prover.go
+++ b/prover/prover.go
@@ -110,7 +110,7 @@ func InitFromConfig(ctx context.Context, p *Prover, cfg *Config) (err error) {
 		TaikoL1Address:        cfg.TaikoL1Address,
 		TaikoL2Address:        cfg.TaikoL2Address,
 		TaikoTokenAddress:     cfg.TaikoTokenAddress,
-		GuardianProverAddress: cfg.GuardianProverAddress,
+		GuardianProverAddress: cfg.GuardianProverMajorityAddress,
 		Timeout:               cfg.RPCTimeout,
 	}); err != nil {
 		return err
@@ -143,7 +143,7 @@ func InitFromConfig(ctx context.Context, p *Prover, cfg *Config) (err error) {
 	}
 	p.sharedState.SetTiers(tiers)
 
-	txBuilder := transaction.NewProveBlockTxBuilder(p.rpc, p.cfg.TaikoL1Address, p.cfg.GuardianProverAddress)
+	txBuilder := transaction.NewProveBlockTxBuilder(p.rpc, p.cfg.TaikoL1Address, p.cfg.GuardianProverMajorityAddress)
 
 	if p.txmgr, err = txmgr.NewSimpleTxManager(
 		"prover",
@@ -375,7 +375,7 @@ func (p *Prover) contestProofOp(req *proofProducer.ContestRequestBody) error {
 // requestProofOp requests a new proof generation operation.
 func (p *Prover) requestProofOp(e *bindings.TaikoL1ClientBlockProposed, minTier uint16) error {
 	if p.IsGuardianProver() {
-		minTier = encoding.TierGuardianID
+		minTier = encoding.TierGuardianMajorityID
 	}
 	if submitter := p.selectSubmitter(minTier); submitter != nil {
 		if err := submitter.RequestProof(p.ctx, e); err != nil {
@@ -453,7 +453,7 @@ func (p *Prover) getSubmitterByTier(tier uint16) proofSubmitter.Submitter {
 
 // IsGuardianProver returns true if the current prover is a guardian prover.
 func (p *Prover) IsGuardianProver() bool {
-	return p.cfg.GuardianProverAddress != common.Address{}
+	return p.cfg.GuardianProverMajorityAddress != common.Address{}
 }
 
 // ProverAddress returns the current prover account address.
diff --git a/prover/prover_test.go b/prover/prover_test.go
index 10f5f05a2..0b14e6dfa 100644
--- a/prover/prover_test.go
+++ b/prover/prover_test.go
@@ -298,14 +298,14 @@ func (s *ProverTestSuite) TestContestWrongBlocks() {
 
 	s.Nil(s.p.transitionContestedHandler.Handle(context.Background(), contestedEvent))
 
-	s.p.cfg.GuardianProverAddress = common.HexToAddress(os.Getenv("GUARDIAN_PROVER_CONTRACT_ADDRESS"))
+	s.p.cfg.GuardianProverMajorityAddress = common.HexToAddress(os.Getenv("GUARDIAN_PROVER_CONTRACT_ADDRESS"))
 	s.True(s.p.IsGuardianProver())
 
-	txBuilder := transaction.NewProveBlockTxBuilder(s.p.rpc, s.p.cfg.TaikoL1Address, s.p.cfg.GuardianProverAddress)
+	txBuilder := transaction.NewProveBlockTxBuilder(s.p.rpc, s.p.cfg.TaikoL1Address, s.p.cfg.GuardianProverMajorityAddress)
 	s.p.proofSubmitters = nil
 	s.Nil(s.p.initProofSubmitters(s.p.txmgr, txBuilder))
 
-	s.p.rpc.GuardianProver, err = bindings.NewGuardianProver(s.p.cfg.GuardianProverAddress, s.p.rpc.L1)
+	s.p.rpc.GuardianProver, err = bindings.NewGuardianProver(s.p.cfg.GuardianProverMajorityAddress, s.p.rpc.L1)
 	s.Nil(err)
 
 	approvedSink := make(chan *bindings.GuardianProverGuardianApproval)
@@ -319,7 +319,7 @@ func (s *ProverTestSuite) TestContestWrongBlocks() {
 	}()
 	req = <-s.p.proofSubmissionCh
 	s.Nil(s.p.requestProofOp(req.Event, req.Tier))
-	s.Nil(s.p.selectSubmitter(encoding.TierGuardianID).SubmitProof(context.Background(), <-s.p.proofGenerationCh))
+	s.Nil(s.p.selectSubmitter(encoding.TierGuardianMajorityID).SubmitProof(context.Background(), <-s.p.proofGenerationCh))
 	approvedEvent := <-approvedSink
 
 	s.Equal(header.Number.Uint64(), approvedEvent.BlockId.Uint64())
@@ -340,7 +340,7 @@ func (s *ProverTestSuite) TestProveExpiredUnassignedBlock() {
 	}()
 
 	e.AssignedProver = common.BytesToAddress(testutils.RandomHash().Bytes())
-	s.p.cfg.GuardianProverAddress = common.Address{}
+	s.p.cfg.GuardianProverMajorityAddress = common.Address{}
 	s.Nil(s.p.assignmentExpiredHandler.Handle(context.Background(), e))
 	req := <-s.p.proofSubmissionCh
 	s.Nil(s.p.requestProofOp(req.Event, req.Tier))
@@ -353,21 +353,21 @@ func (s *ProverTestSuite) TestProveExpiredUnassignedBlock() {
 }
 
 func (s *ProverTestSuite) TestSelectSubmitter() {
-	submitter := s.p.selectSubmitter(encoding.TierGuardianID - 1)
+	submitter := s.p.selectSubmitter(encoding.TierGuardianMajorityID - 1)
 	s.NotNil(submitter)
-	s.Equal(encoding.TierGuardianID, submitter.Tier())
+	s.Equal(encoding.TierGuardianMajorityID, submitter.Tier())
 }
 
 func (s *ProverTestSuite) TestSelectSubmitterNotFound() {
-	submitter := s.p.selectSubmitter(encoding.TierGuardianID + 1)
+	submitter := s.p.selectSubmitter(encoding.TierGuardianMajorityID + 1)
 	s.Nil(submitter)
 }
 
 func (s *ProverTestSuite) TestGetSubmitterByTier() {
-	submitter := s.p.getSubmitterByTier(encoding.TierGuardianID)
+	submitter := s.p.getSubmitterByTier(encoding.TierGuardianMajorityID)
 	s.NotNil(submitter)
-	s.Equal(encoding.TierGuardianID, submitter.Tier())
-	s.Nil(s.p.getSubmitterByTier(encoding.TierGuardianID + 1))
+	s.Equal(encoding.TierGuardianMajorityID, submitter.Tier())
+	s.Nil(s.p.getSubmitterByTier(encoding.TierGuardianMajorityID + 1))
 }
 
 func (s *ProverTestSuite) TestProveOp() {
diff --git a/prover/server/api.go b/prover/server/api.go
index be35869ac..664d14cc1 100644
--- a/prover/server/api.go
+++ b/prover/server/api.go
@@ -148,7 +148,7 @@ func (s *ProverServer) CreateAssignment(c echo.Context) error {
 
 	// 4. Check if the proof fee meets prover's minimum requirement for each tier.
 	for _, tier := range req.TierFees {
-		if tier.Tier == encoding.TierGuardianID {
+		if tier.Tier == encoding.TierGuardianMajorityID {
 			continue
 		}