diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index b2b7e5c4b0..359f51acc2 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -1839,7 +1839,9 @@ func (s *TransactionAPI) SendTransaction(ctx context.Context, args TransactionAr
 // FillTransaction fills the defaults (nonce, gas, gasPrice or 1559 fields)
 // on a given unsigned transaction, and returns it to the caller for further
 // processing (signing + broadcast).
-func (s *TransactionAPI) FillTransaction(ctx context.Context, args BlobTransactionArgs) (*SignTransactionResult, error) {
+func (s *TransactionAPI) FillTransaction(ctx context.Context, args TransactionArgs) (*SignTransactionResult, error) {
+	args.blobSidecarAllowed = true
+
 	// Set some sanity defaults and terminate on failure
 	if err := args.setDefaults(ctx, s.b); err != nil {
 		return nil, err
diff --git a/internal/ethapi/api_test.go b/internal/ethapi/api_test.go
index 8f3b96856a..cdeeace5e0 100644
--- a/internal/ethapi/api_test.go
+++ b/internal/ethapi/api_test.go
@@ -991,12 +991,10 @@ func TestSignTransaction(t *testing.T) {
 		b.SetPoS()
 	})
 	api := NewTransactionAPI(b, nil)
-	res, err := api.FillTransaction(context.Background(), BlobTransactionArgs{
-		TransactionArgs: TransactionArgs{
-			From:  &b.acc.Address,
-			To:    &to,
-			Value: (*hexutil.Big)(big.NewInt(1)),
-		},
+	res, err := api.FillTransaction(context.Background(), TransactionArgs{
+		From:  &b.acc.Address,
+		To:    &to,
+		Value: (*hexutil.Big)(big.NewInt(1)),
 	})
 	if err != nil {
 		t.Fatalf("failed to fill tx defaults: %v\n", err)
@@ -1031,13 +1029,11 @@ func TestSignBlobTransaction(t *testing.T) {
 		b.SetPoS()
 	})
 	api := NewTransactionAPI(b, nil)
-	res, err := api.FillTransaction(context.Background(), BlobTransactionArgs{
-		TransactionArgs: TransactionArgs{
-			From:       &b.acc.Address,
-			To:         &to,
-			Value:      (*hexutil.Big)(big.NewInt(1)),
-			BlobHashes: []common.Hash{{0x01, 0x22}},
-		},
+	res, err := api.FillTransaction(context.Background(), TransactionArgs{
+		From:       &b.acc.Address,
+		To:         &to,
+		Value:      (*hexutil.Big)(big.NewInt(1)),
+		BlobHashes: []common.Hash{{0x01, 0x22}},
 	})
 	if err != nil {
 		t.Fatalf("failed to fill tx defaults: %v\n", err)
@@ -1067,13 +1063,11 @@ func TestSendBlobTransaction(t *testing.T) {
 		b.SetPoS()
 	})
 	api := NewTransactionAPI(b, nil)
-	res, err := api.FillTransaction(context.Background(), BlobTransactionArgs{
-		TransactionArgs: TransactionArgs{
-			From:       &b.acc.Address,
-			To:         &to,
-			Value:      (*hexutil.Big)(big.NewInt(1)),
-			BlobHashes: []common.Hash{common.Hash{0x01, 0x22}},
-		},
+	res, err := api.FillTransaction(context.Background(), TransactionArgs{
+		From:       &b.acc.Address,
+		To:         &to,
+		Value:      (*hexutil.Big)(big.NewInt(1)),
+		BlobHashes: []common.Hash{common.Hash{0x01, 0x22}},
 	})
 	if err != nil {
 		t.Fatalf("failed to fill tx defaults: %v\n", err)
@@ -1112,18 +1106,16 @@ func TestFillBlobTransaction(t *testing.T) {
 	}
 	suite := []struct {
 		name string
-		args BlobTransactionArgs
+		args TransactionArgs
 		err  string
 		want *result
 	}{
 		{
 			name: "TestInvalidParamsCombination1",
-			args: BlobTransactionArgs{
-				TransactionArgs: TransactionArgs{
-					From:  &b.acc.Address,
-					To:    &to,
-					Value: (*hexutil.Big)(big.NewInt(1)),
-				},
+			args: TransactionArgs{
+				From:   &b.acc.Address,
+				To:     &to,
+				Value:  (*hexutil.Big)(big.NewInt(1)),
 				Blobs:  []kzg4844.Blob{{}},
 				Proofs: []kzg4844.Proof{{}},
 			},
@@ -1131,12 +1123,10 @@ func TestFillBlobTransaction(t *testing.T) {
 		},
 		{
 			name: "TestInvalidParamsCombination2",
-			args: BlobTransactionArgs{
-				TransactionArgs: TransactionArgs{
-					From:  &b.acc.Address,
-					To:    &to,
-					Value: (*hexutil.Big)(big.NewInt(1)),
-				},
+			args: TransactionArgs{
+				From:        &b.acc.Address,
+				To:          &to,
+				Value:       (*hexutil.Big)(big.NewInt(1)),
 				Blobs:       []kzg4844.Blob{{}},
 				Commitments: []kzg4844.Commitment{{}},
 			},
@@ -1144,12 +1134,10 @@ func TestFillBlobTransaction(t *testing.T) {
 		},
 		{
 			name: "TestInvalidParamsCount1",
-			args: BlobTransactionArgs{
-				TransactionArgs: TransactionArgs{
-					From:  &b.acc.Address,
-					To:    &to,
-					Value: (*hexutil.Big)(big.NewInt(1)),
-				},
+			args: TransactionArgs{
+				From:        &b.acc.Address,
+				To:          &to,
+				Value:       (*hexutil.Big)(big.NewInt(1)),
 				Blobs:       []kzg4844.Blob{{}},
 				Commitments: []kzg4844.Commitment{{}, {}},
 				Proofs:      []kzg4844.Proof{{}, {}},
@@ -1158,12 +1146,10 @@ func TestFillBlobTransaction(t *testing.T) {
 		},
 		{
 			name: "TestInvalidParamsCount2",
-			args: BlobTransactionArgs{
-				TransactionArgs: TransactionArgs{
-					From:  &b.acc.Address,
-					To:    &to,
-					Value: (*hexutil.Big)(big.NewInt(1)),
-				},
+			args: TransactionArgs{
+				From:        &b.acc.Address,
+				To:          &to,
+				Value:       (*hexutil.Big)(big.NewInt(1)),
 				Blobs:       []kzg4844.Blob{{}, {}},
 				Commitments: []kzg4844.Commitment{{}, {}},
 				Proofs:      []kzg4844.Proof{{}},
@@ -1172,12 +1158,10 @@ func TestFillBlobTransaction(t *testing.T) {
 		},
 		{
 			name: "TestInvalidProofVerification",
-			args: BlobTransactionArgs{
-				TransactionArgs: TransactionArgs{
-					From:  &b.acc.Address,
-					To:    &to,
-					Value: (*hexutil.Big)(big.NewInt(1)),
-				},
+			args: TransactionArgs{
+				From:        &b.acc.Address,
+				To:          &to,
+				Value:       (*hexutil.Big)(big.NewInt(1)),
 				Blobs:       []kzg4844.Blob{{}, {}},
 				Commitments: []kzg4844.Commitment{{}, {}},
 				Proofs:      []kzg4844.Proof{{}, {}},
@@ -1186,12 +1170,10 @@ func TestFillBlobTransaction(t *testing.T) {
 		},
 		{
 			name: "TestGenerateBlobHashes",
-			args: BlobTransactionArgs{
-				TransactionArgs: TransactionArgs{
-					From:  &b.acc.Address,
-					To:    &to,
-					Value: (*hexutil.Big)(big.NewInt(1)),
-				},
+			args: TransactionArgs{
+				From:        &b.acc.Address,
+				To:          &to,
+				Value:       (*hexutil.Big)(big.NewInt(1)),
 				Blobs:       []kzg4844.Blob{emptyBlob},
 				Commitments: []kzg4844.Commitment{emptyBlobCommit},
 				Proofs:      []kzg4844.Proof{emptyBlobProof},
@@ -1207,13 +1189,11 @@ func TestFillBlobTransaction(t *testing.T) {
 		},
 		{
 			name: "TestValidBlobHashes",
-			args: BlobTransactionArgs{
-				TransactionArgs: TransactionArgs{
-					From:       &b.acc.Address,
-					To:         &to,
-					Value:      (*hexutil.Big)(big.NewInt(1)),
-					BlobHashes: []common.Hash{emptyBlobHash},
-				},
+			args: TransactionArgs{
+				From:        &b.acc.Address,
+				To:          &to,
+				Value:       (*hexutil.Big)(big.NewInt(1)),
+				BlobHashes:  []common.Hash{emptyBlobHash},
 				Blobs:       []kzg4844.Blob{emptyBlob},
 				Commitments: []kzg4844.Commitment{emptyBlobCommit},
 				Proofs:      []kzg4844.Proof{emptyBlobProof},
@@ -1229,13 +1209,11 @@ func TestFillBlobTransaction(t *testing.T) {
 		},
 		{
 			name: "TestInvalidBlobHashes",
-			args: BlobTransactionArgs{
-				TransactionArgs: TransactionArgs{
-					From:       &b.acc.Address,
-					To:         &to,
-					Value:      (*hexutil.Big)(big.NewInt(1)),
-					BlobHashes: []common.Hash{{0x01, 0x22}},
-				},
+			args: TransactionArgs{
+				From:        &b.acc.Address,
+				To:          &to,
+				Value:       (*hexutil.Big)(big.NewInt(1)),
+				BlobHashes:  []common.Hash{{0x01, 0x22}},
 				Blobs:       []kzg4844.Blob{emptyBlob},
 				Commitments: []kzg4844.Commitment{emptyBlobCommit},
 				Proofs:      []kzg4844.Proof{emptyBlobProof},
@@ -1244,12 +1222,10 @@ func TestFillBlobTransaction(t *testing.T) {
 		},
 		{
 			name: "TestGenerateBlobProofs",
-			args: BlobTransactionArgs{
-				TransactionArgs: TransactionArgs{
-					From:  &b.acc.Address,
-					To:    &to,
-					Value: (*hexutil.Big)(big.NewInt(1)),
-				},
+			args: TransactionArgs{
+				From:  &b.acc.Address,
+				To:    &to,
+				Value: (*hexutil.Big)(big.NewInt(1)),
 				Blobs: []kzg4844.Blob{emptyBlob},
 			},
 			want: &result{
diff --git a/internal/ethapi/transaction_args.go b/internal/ethapi/transaction_args.go
index 6b41e0a1c2..6a9f4d6c16 100644
--- a/internal/ethapi/transaction_args.go
+++ b/internal/ethapi/transaction_args.go
@@ -41,97 +41,6 @@ var (
 	maxBlobsPerTransaction = params.MaxBlobGasPerBlock / params.BlobTxBlobGasPerBlob
 )
 
-// BlobTransactionArgs represents the arguments to construct a new
-// blob transaction. It includes the blob side-car.
-type BlobTransactionArgs struct {
-	TransactionArgs
-	Blobs       []kzg4844.Blob       `json:"blobs"`
-	Commitments []kzg4844.Commitment `json:"commitments"`
-	Proofs      []kzg4844.Proof      `json:"proofs"`
-}
-
-func (args *BlobTransactionArgs) setDefaults(ctx context.Context, b Backend) error {
-	// First validate and fill in other fields to avoid
-	// the expensive blob proof computation for an invalid transaction.
-	if err := args.TransactionArgs.setDefaults(ctx, b); err != nil {
-		return err
-	}
-	// No blobs, we're done.
-	if args.Blobs == nil {
-		return nil
-	}
-	n := len(args.Blobs)
-	// Assume user provides either only blobs (w/o hashes), or
-	// blobs together with commitments and proofs.
-	if args.Commitments == nil && args.Proofs != nil {
-		return errors.New(`blob proofs provided while commitments were not`)
-	} else if args.Commitments != nil && args.Proofs == nil {
-		return errors.New(`blob commitments provided while proofs were not`)
-	}
-	// len(blobs) == len(commitments) == len(proofs) == len(hashes)
-	if args.Commitments != nil && len(args.Commitments) != n {
-		return fmt.Errorf("number of blobs and commitments mismatch (have=%d, want=%d)", len(args.Commitments), n)
-	}
-	if args.Proofs != nil && len(args.Proofs) != n {
-		return fmt.Errorf("number of blobs and proofs mismatch (have=%d, want=%d)", len(args.Proofs), n)
-	}
-	if args.BlobHashes != nil && len(args.BlobHashes) != n {
-		return fmt.Errorf("number of blobs and hashes mismatch (have=%d, want=%d)", len(args.BlobHashes), n)
-	}
-	if args.Commitments == nil {
-		// Generate commitment and proof.
-		commitments := make([]kzg4844.Commitment, n)
-		proofs := make([]kzg4844.Proof, n)
-		for i, b := range args.Blobs {
-			c, err := kzg4844.BlobToCommitment(b)
-			if err != nil {
-				return err
-			}
-			commitments[i] = c
-			p, err := kzg4844.ComputeBlobProof(b, c)
-			if err != nil {
-				return err
-			}
-			proofs[i] = p
-		}
-		args.Commitments = commitments
-		args.Proofs = proofs
-	} else {
-		for i, b := range args.Blobs {
-			if err := kzg4844.VerifyBlobProof(b, args.Commitments[i], args.Proofs[i]); err != nil {
-				return fmt.Errorf("failed to verify blob proof: %v", err)
-			}
-		}
-	}
-	hashes := make([]common.Hash, n)
-	hasher := sha256.New()
-	for i, c := range args.Commitments {
-		hashes[i] = kzg4844.CalcBlobHashV1(hasher, &c)
-	}
-	if args.BlobHashes != nil {
-		for i, h := range hashes {
-			if h != args.BlobHashes[i] {
-				return fmt.Errorf("blob hash verification failed (have=%s, want=%s)", args.BlobHashes[i], h)
-			}
-		}
-	} else {
-		args.BlobHashes = hashes
-	}
-	return nil
-}
-
-func (args *BlobTransactionArgs) toTransaction() *types.Transaction {
-	tx := args.TransactionArgs.toTransaction()
-	if args.Blobs != nil && tx.Type() == types.BlobTxType {
-		return tx.WithBlobTxSidecar(&types.BlobTxSidecar{
-			Blobs:       args.Blobs,
-			Commitments: args.Commitments,
-			Proofs:      args.Proofs,
-		})
-	}
-	return tx
-}
-
 // TransactionArgs represents the arguments to construct a new transaction
 // or a message call.
 type TransactionArgs struct {
@@ -154,9 +63,17 @@ type TransactionArgs struct {
 	AccessList *types.AccessList `json:"accessList,omitempty"`
 	ChainID    *hexutil.Big      `json:"chainId,omitempty"`
 
-	// Introduced by EIP-4844.
+	// For BlobTxType
 	BlobFeeCap *hexutil.Big  `json:"maxFeePerBlobGas"`
 	BlobHashes []common.Hash `json:"blobVersionedHashes,omitempty"`
+
+	// For BlobTxType transactions with blob sidecar
+	Blobs       []kzg4844.Blob       `json:"blobs"`
+	Commitments []kzg4844.Commitment `json:"commitments"`
+	Proofs      []kzg4844.Proof      `json:"proofs"`
+
+	// This configures whether blobs are allowed to be passed.
+	blobSidecarAllowed bool
 }
 
 // from retrieves the transaction sender address.
@@ -180,9 +97,13 @@ func (args *TransactionArgs) data() []byte {
 
 // setDefaults fills in default values for unspecified tx fields.
 func (args *TransactionArgs) setDefaults(ctx context.Context, b Backend) error {
+	if err := args.setBlobTxSidecar(ctx, b); err != nil {
+		return err
+	}
 	if err := args.setFeeDefaults(ctx, b); err != nil {
 		return err
 	}
+
 	if args.Value == nil {
 		args.Value = new(hexutil.Big)
 	}
@@ -196,6 +117,8 @@ func (args *TransactionArgs) setDefaults(ctx context.Context, b Backend) error {
 	if args.Data != nil && args.Input != nil && !bytes.Equal(*args.Data, *args.Input) {
 		return errors.New(`both "data" and "input" are set and not equal. Please use "input" to pass transaction call data`)
 	}
+
+	// BlobTx fields
 	if args.BlobHashes != nil && args.To == nil {
 		return errors.New(`blob transactions cannot have the form of a create transaction`)
 	}
@@ -205,9 +128,12 @@ func (args *TransactionArgs) setDefaults(ctx context.Context, b Backend) error {
 	if args.BlobHashes != nil && len(args.BlobHashes) > maxBlobsPerTransaction {
 		return fmt.Errorf(`too many blobs in transaction (have=%d, max=%d)`, len(args.BlobHashes), maxBlobsPerTransaction)
 	}
+
+	// create check
 	if args.To == nil && len(args.data()) == 0 {
 		return errors.New(`contract creation without any data provided`)
 	}
+
 	// Estimate the gas usage if necessary.
 	if args.Gas == nil {
 		// These fields are immutable during the estimation, safe to
@@ -231,6 +157,7 @@ func (args *TransactionArgs) setDefaults(ctx context.Context, b Backend) error {
 		args.Gas = &estimated
 		log.Trace("Estimate gas usage automatically", "gas", args.Gas)
 	}
+
 	// If chain id is provided, ensure it matches the local chain id. Otherwise, set the local
 	// chain id as the default.
 	want := b.ChainConfig().ChainID
@@ -266,10 +193,12 @@ func (args *TransactionArgs) setFeeDefaults(ctx context.Context, b Backend) erro
 		}
 		return nil // No need to set anything, user already set MaxFeePerGas and MaxPriorityFeePerGas
 	}
+
 	// Sanity check the EIP-4844 fee parameters.
 	if args.BlobFeeCap != nil && args.BlobFeeCap.ToInt().Sign() == 0 {
 		return errors.New("maxFeePerBlobGas must be non-zero")
 	}
+
 	// Sanity check the non-EIP-1559 fee parameters.
 	head := b.CurrentHeader()
 	isLondon := b.ChainConfig().IsLondon(head.Number)
@@ -351,6 +280,81 @@ func (args *TransactionArgs) setLondonFeeDefaults(ctx context.Context, head *typ
 	return nil
 }
 
+// setBlobTxSidecar adds the blob tx
+func (args *TransactionArgs) setBlobTxSidecar(ctx context.Context, b Backend) error {
+	// No blobs, we're done.
+	if args.Blobs == nil {
+		return nil
+	}
+
+	// Passing blobs is not allowed in all contexts, only in specific methods.
+	if !args.blobSidecarAllowed {
+		return errors.New("'blobs' is not supported for this RPC method")
+	}
+
+	n := len(args.Blobs)
+	// Assume user provides either only blobs (w/o hashes), or
+	// blobs together with commitments and proofs.
+	if args.Commitments == nil && args.Proofs != nil {
+		return errors.New(`blob proofs provided while commitments were not`)
+	} else if args.Commitments != nil && args.Proofs == nil {
+		return errors.New(`blob commitments provided while proofs were not`)
+	}
+
+	// len(blobs) == len(commitments) == len(proofs) == len(hashes)
+	if args.Commitments != nil && len(args.Commitments) != n {
+		return fmt.Errorf("number of blobs and commitments mismatch (have=%d, want=%d)", len(args.Commitments), n)
+	}
+	if args.Proofs != nil && len(args.Proofs) != n {
+		return fmt.Errorf("number of blobs and proofs mismatch (have=%d, want=%d)", len(args.Proofs), n)
+	}
+	if args.BlobHashes != nil && len(args.BlobHashes) != n {
+		return fmt.Errorf("number of blobs and hashes mismatch (have=%d, want=%d)", len(args.BlobHashes), n)
+	}
+
+	if args.Commitments == nil {
+		// Generate commitment and proof.
+		commitments := make([]kzg4844.Commitment, n)
+		proofs := make([]kzg4844.Proof, n)
+		for i, b := range args.Blobs {
+			c, err := kzg4844.BlobToCommitment(b)
+			if err != nil {
+				return err
+			}
+			commitments[i] = c
+			p, err := kzg4844.ComputeBlobProof(b, c)
+			if err != nil {
+				return err
+			}
+			proofs[i] = p
+		}
+		args.Commitments = commitments
+		args.Proofs = proofs
+	} else {
+		for i, b := range args.Blobs {
+			if err := kzg4844.VerifyBlobProof(b, args.Commitments[i], args.Proofs[i]); err != nil {
+				return fmt.Errorf("failed to verify blob proof: %v", err)
+			}
+		}
+	}
+
+	hashes := make([]common.Hash, n)
+	hasher := sha256.New()
+	for i, c := range args.Commitments {
+		hashes[i] = kzg4844.CalcBlobHashV1(hasher, &c)
+	}
+	if args.BlobHashes != nil {
+		for i, h := range hashes {
+			if h != args.BlobHashes[i] {
+				return fmt.Errorf("blob hash verification failed (have=%s, want=%s)", args.BlobHashes[i], h)
+			}
+		}
+	} else {
+		args.BlobHashes = hashes
+	}
+	return nil
+}
+
 // ToMessage converts the transaction arguments to the Message type used by the
 // core evm. This method is used in calls and traces that do not require a real
 // live transaction.
@@ -464,6 +468,14 @@ func (args *TransactionArgs) toTransaction() *types.Transaction {
 			BlobHashes: args.BlobHashes,
 			BlobFeeCap: uint256.MustFromBig((*big.Int)(args.BlobFeeCap)),
 		}
+		if args.Blobs != nil {
+			data.(*types.BlobTx).Sidecar = &types.BlobTxSidecar{
+				Blobs:       args.Blobs,
+				Commitments: args.Commitments,
+				Proofs:      args.Proofs,
+			}
+		}
+
 	case args.MaxFeePerGas != nil:
 		al := types.AccessList{}
 		if args.AccessList != nil {
@@ -480,6 +492,7 @@ func (args *TransactionArgs) toTransaction() *types.Transaction {
 			Data:       args.data(),
 			AccessList: al,
 		}
+
 	case args.AccessList != nil:
 		data = &types.AccessListTx{
 			To:         args.To,
@@ -491,6 +504,7 @@ func (args *TransactionArgs) toTransaction() *types.Transaction {
 			Data:       args.data(),
 			AccessList: *args.AccessList,
 		}
+
 	default:
 		data = &types.LegacyTx{
 			To:       args.To,
@@ -504,12 +518,6 @@ func (args *TransactionArgs) toTransaction() *types.Transaction {
 	return types.NewTx(data)
 }
 
-// ToTransaction converts the arguments to a transaction.
-// This assumes that setDefaults has been called.
-func (args *TransactionArgs) ToTransaction() *types.Transaction {
-	return args.toTransaction()
-}
-
 // IsEIP4844 returns an indicator if the args contains EIP4844 fields.
 func (args *TransactionArgs) IsEIP4844() bool {
 	return args.BlobHashes != nil || args.BlobFeeCap != nil