diff --git a/encoding/bitmap.go b/encoding/bitmap.go
index dff26c5..46c3ed7 100644
--- a/encoding/bitmap.go
+++ b/encoding/bitmap.go
@@ -80,3 +80,13 @@ func DecodeBitmap(skippedL1MessageBitmap []byte, totalL1MessagePopped int) ([]*b
 	}
 	return skippedBitmap, nil
 }
+
+// IsL1MessageSkipped checks if the L1 message at the given index is skipped.
+func IsL1MessageSkipped(skippedBitmap []*big.Int, index uint64) bool {
+	if index >= uint64(len(skippedBitmap))*256 {
+		return false
+	}
+	quo := index / 256
+	rem := index % 256
+	return skippedBitmap[quo].Bit(int(rem)) == 1
+}
diff --git a/encoding/bitmap_test.go b/encoding/bitmap_test.go
index 0d65f53..aadf241 100644
--- a/encoding/bitmap_test.go
+++ b/encoding/bitmap_test.go
@@ -2,7 +2,6 @@ package encoding
 
 import (
 	"encoding/hex"
-	"math/big"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -16,25 +15,16 @@ func TestDecodeBitmap(t *testing.T) {
 	decodedBitmap, err := DecodeBitmap(skippedL1MessageBitmap, 42)
 	assert.NoError(t, err)
 
-	isL1MessageSkipped := func(skippedBitmap []*big.Int, index uint64) bool {
-		if index >= uint64(len(skippedBitmap))*256 {
-			return false
-		}
-		quo := index / 256
-		rem := index % 256
-		return skippedBitmap[quo].Bit(int(rem)) == 1
-	}
-
-	assert.True(t, isL1MessageSkipped(decodedBitmap, 0))
-	assert.True(t, isL1MessageSkipped(decodedBitmap, 9))
-	assert.False(t, isL1MessageSkipped(decodedBitmap, 10))
-	assert.True(t, isL1MessageSkipped(decodedBitmap, 11))
-	assert.True(t, isL1MessageSkipped(decodedBitmap, 36))
-	assert.False(t, isL1MessageSkipped(decodedBitmap, 37))
-	assert.False(t, isL1MessageSkipped(decodedBitmap, 38))
-	assert.False(t, isL1MessageSkipped(decodedBitmap, 39))
-	assert.False(t, isL1MessageSkipped(decodedBitmap, 40))
-	assert.False(t, isL1MessageSkipped(decodedBitmap, 41))
+	assert.True(t, IsL1MessageSkipped(decodedBitmap, 0))
+	assert.True(t, IsL1MessageSkipped(decodedBitmap, 9))
+	assert.False(t, IsL1MessageSkipped(decodedBitmap, 10))
+	assert.True(t, IsL1MessageSkipped(decodedBitmap, 11))
+	assert.True(t, IsL1MessageSkipped(decodedBitmap, 36))
+	assert.False(t, IsL1MessageSkipped(decodedBitmap, 37))
+	assert.False(t, IsL1MessageSkipped(decodedBitmap, 38))
+	assert.False(t, IsL1MessageSkipped(decodedBitmap, 39))
+	assert.False(t, IsL1MessageSkipped(decodedBitmap, 40))
+	assert.False(t, IsL1MessageSkipped(decodedBitmap, 41))
 
 	_, err = DecodeBitmap([]byte{0x00}, 8)
 	assert.Error(t, err)