diff --git a/packages/taiko-client/pkg/rpc/engine.go b/packages/taiko-client/pkg/rpc/engine.go
index ca30e6ae192..24012f88175 100644
--- a/packages/taiko-client/pkg/rpc/engine.go
+++ b/packages/taiko-client/pkg/rpc/engine.go
@@ -19,6 +19,7 @@ type EngineClient struct {
 	*rpc.Client
 }
 
+// NewJWTEngineClient creates a new EngineClient with JWT authentication.
 func NewJWTEngineClient(url, jwtSecret string) (*EngineClient, error) {
 	var jwt = StringToBytes32(jwtSecret)
 	if jwt == (common.Hash{}) || url == "" {
diff --git a/packages/taiko-client/pkg/rpc/ethclient.go b/packages/taiko-client/pkg/rpc/ethclient.go
index 23254d1b666..6b5e0312f3d 100644
--- a/packages/taiko-client/pkg/rpc/ethclient.go
+++ b/packages/taiko-client/pkg/rpc/ethclient.go
@@ -485,7 +485,7 @@ type SignTransactionResult struct {
 	Tx  *types.Transaction `json:"tx"`
 }
 
-// FillTransaction fill transaction.
+// FillTransaction fills in the missing fields of a transaction and signs it.
 func (c *EthClient) FillTransaction(ctx context.Context, args *TransactionArgs) (*types.Transaction, error) {
 	ctxWithTimeout, cancel := CtxWithTimeoutOrDefault(ctx, c.timeout)
 	defer cancel()
diff --git a/packages/taiko-client/pkg/rpc/fallback.go b/packages/taiko-client/pkg/rpc/fallback.go
deleted file mode 100644
index 6237f2105a0..00000000000
--- a/packages/taiko-client/pkg/rpc/fallback.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package rpc
-
-import (
-	"errors"
-	"math/big"
-	"strings"
-)
-
-// Taken from:
-// https://github.com/ethereum-optimism/optimism-legacy/blob/develop/bss-core/drivers/max_priority_fee_fallback.go
-var (
-	//lint:ignore ST1005 allow `errMaxPriorityFeePerGasNotFound` to be capitalized.
-	errMaxPriorityFeePerGasNotFound = errors.New(
-		"method eth_maxPriorityFeePerGas not found",
-	)
-
-	// FallbackGasTipCap is the default fallback gasTipCap used when we are
-	// unable to query an L1 backend for a suggested gasTipCap.
-	FallbackGasTipCap = big.NewInt(1500000000)
-)
-
-// IsMaxPriorityFeePerGasNotFoundError returns true if the provided error
-// signals that the backend does not support the eth_maxPriorityFeePerGas
-// method. In this case, the caller should fallback to using the constant above.
-func IsMaxPriorityFeePerGasNotFoundError(err error) bool {
-	return strings.Contains(
-		err.Error(), errMaxPriorityFeePerGasNotFound.Error(),
-	)
-}
diff --git a/packages/taiko-client/pkg/rpc/fallback_test.go b/packages/taiko-client/pkg/rpc/fallback_test.go
deleted file mode 100644
index a7d05649dc7..00000000000
--- a/packages/taiko-client/pkg/rpc/fallback_test.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package rpc
-
-import (
-	"errors"
-	"testing"
-
-	"github.com/stretchr/testify/require"
-)
-
-func TestIsMaxPriorityFeePerGasNotFoundError(t *testing.T) {
-	require.False(t, IsMaxPriorityFeePerGasNotFoundError(errors.New("test")))
-	require.True(t, IsMaxPriorityFeePerGasNotFoundError(errMaxPriorityFeePerGasNotFound))
-}
diff --git a/packages/taiko-client/pkg/utils/utils.go b/packages/taiko-client/pkg/utils/utils.go
index a7f7b0eb8df..7c7ca2845aa 100644
--- a/packages/taiko-client/pkg/utils/utils.go
+++ b/packages/taiko-client/pkg/utils/utils.go
@@ -69,14 +69,6 @@ func Min[T constraints.Integer](a, b T) T {
 	return b
 }
 
-// Max return the maximum value of two integers.
-func Max[T constraints.Integer](a, b T) T {
-	if a > b {
-		return a
-	}
-	return b
-}
-
 // Compress compresses the given txList bytes using zlib.
 func Compress(txList []byte) ([]byte, error) {
 	var b bytes.Buffer
diff --git a/packages/taiko-client/proposer/proposer.go b/packages/taiko-client/proposer/proposer.go
index 3ac58e51565..866bc5b86e8 100644
--- a/packages/taiko-client/proposer/proposer.go
+++ b/packages/taiko-client/proposer/proposer.go
@@ -293,6 +293,7 @@ func (p *Proposer) ProposeOp(ctx context.Context) error {
 		"lastProposedAt", p.lastProposedAt,
 	)
 
+	// Fetch pending L2 transactions from mempool.
 	txLists, err := p.fetchPoolContent(filterPoolContent)
 	if err != nil {
 		return err