diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..884d976
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+build/
+.idea/
\ No newline at end of file
diff --git a/types/codec.go b/types/codec.go
index 061de29..87a3359 100644
--- a/types/codec.go
+++ b/types/codec.go
@@ -56,7 +56,7 @@ func MustProtoMarshalJSON(msg proto.Message) []byte {
 // ProtoMarshalJSON provides an auxiliary function to return Proto3 JSON encoded
 // bytes of a message.
 func ProtoMarshalJSON(msg proto.Message, resolver jsonpb.AnyResolver) ([]byte, error) {
-	jm := &jsonpb.Marshaler{OrigName: false, EmitDefaults: true, AnyResolver: resolver}
+	jm := &jsonpb.Marshaler{OrigName: false, EmitDefaults: false, AnyResolver: resolver}
 	err := codectypes.UnpackInterfaces(msg, codectypes.ProtoJSONPacker{JSONPBMarshaler: jm})
 	if err != nil {
 		return nil, err
diff --git a/types/packet.go b/types/packet.go
index b814916..27370aa 100644
--- a/types/packet.go
+++ b/types/packet.go
@@ -80,6 +80,17 @@ func (nftpd NonFungibleTokenPacketData) ValidateBasic() error {
 
 // GetBytes is a helper for serializing
 func (nftpd NonFungibleTokenPacketData) GetBytes() []byte {
+	// Format will reshape tokenUris and tokenData in NonFungibleTokenPacketData:
+	// 1. if tokenUris/tokenData is ["","",""] or [], then set it to nil.
+	// 2. if tokenUris/tokenData is ["a","b","c"] or ["a", "", "c"], then keep it.
+	// NOTE: Only use this before sending pkg.
+	if requireShape(nftpd.TokenUris) {
+		nftpd.TokenUris = nil
+	}
+
+	if requireShape(nftpd.TokenData) {
+		nftpd.TokenData = nil
+	}
 	return sdk.MustSortJSON(MustProtoMarshalJSON(&nftpd))
 }
 
@@ -89,3 +100,28 @@ func GetIfExist(i int, data []string) string {
 	}
 	return data[i]
 }
+
+// requireShape checks if TokenUris/TokenData needs to be set as nil
+func requireShape(contents []string) bool {
+	if contents == nil {
+		return false
+	}
+
+	// empty slice of string
+	if len(contents) == 0 {
+		return true
+	}
+
+	emptyStringCount := 0
+	for _, v := range contents {
+		if len(v) == 0 {
+			emptyStringCount++
+		}
+	}
+	// slice of string with only empty string.
+	if emptyStringCount == len(contents) {
+		return true
+	}
+
+	return false
+}
diff --git a/types/packet_test.go b/types/packet_test.go
index 1dd810c..b29886a 100644
--- a/types/packet_test.go
+++ b/types/packet_test.go
@@ -1,6 +1,7 @@
 package types
 
 import (
+	"bytes"
 	"testing"
 )
 
@@ -31,11 +32,21 @@ func TestNonFungibleTokenPacketData_ValidateBasic(t *testing.T) {
 			packet:  NonFungibleTokenPacketData{"cryptoCat", "uri", "", []string{"kitty"}, []string{}, tokenData, sender, receiver, "memo"},
 			wantErr: false,
 		},
+		{
+			name:    "valid packet with nil tokenUris",
+			packet:  NonFungibleTokenPacketData{"cryptoCat", "uri", "", []string{"kitty"}, nil, tokenData, sender, receiver, "memo"},
+			wantErr: false,
+		},
 		{
 			name:    "valid packet with tokenUris",
 			packet:  NonFungibleTokenPacketData{"cryptoCat", "uri", "", []string{"kitty"}, []string{"1"}, tokenData, sender, receiver, "memo"},
 			wantErr: false,
 		},
+		{
+			name:    "valid packet with tokenUris of empty string entry",
+			packet:  NonFungibleTokenPacketData{"cryptoCat", "uri", "", []string{"kitty", "mary"}, []string{"1", ""}, tokenData, sender, receiver, "memo"},
+			wantErr: false,
+		},
 		{
 			name:    "invalid packet with unmatched tokenUris number",
 			packet:  NonFungibleTokenPacketData{"cryptoCat", "uri", "", []string{"kitty"}, []string{"1", "2"}, tokenData, sender, receiver, "memo"},
@@ -46,11 +57,21 @@ func TestNonFungibleTokenPacketData_ValidateBasic(t *testing.T) {
 			packet:  NonFungibleTokenPacketData{"cryptoCat", "uri", "", []string{"kitty"}, []string{}, []string{}, sender, receiver, "memo"},
 			wantErr: false,
 		},
+		{
+			name:    "valid packet with nil tokenData",
+			packet:  NonFungibleTokenPacketData{"cryptoCat", "uri", "", []string{"kitty"}, []string{}, nil, sender, receiver, "memo"},
+			wantErr: false,
+		},
 		{
 			name:    "valid packet with tokenData",
 			packet:  NonFungibleTokenPacketData{"cryptoCat", "uri", "", []string{"kitty"}, []string{}, []string{"1"}, sender, receiver, "memo"},
 			wantErr: false,
 		},
+		{
+			name:    "valid packet with tokenData of empty string entry",
+			packet:  NonFungibleTokenPacketData{"cryptoCat", "uri", "", []string{"kitty", "mary"}, []string{}, []string{"1", ""}, sender, receiver, "memo"},
+			wantErr: false,
+		},
 		{
 			name:    "invalid packet with unmatched tokenData number",
 			packet:  NonFungibleTokenPacketData{"cryptoCat", "uri", "", []string{"kitty"}, []string{}, []string{"1", "2"}, sender, receiver, "memo"},
@@ -75,3 +96,77 @@ func TestNonFungibleTokenPacketData_ValidateBasic(t *testing.T) {
 		})
 	}
 }
+
+func TestNonFungibleTokenPacketData_GetBytes(t *testing.T) {
+	type fields struct {
+		ClassId   string
+		ClassUri  string
+		ClassData string
+		TokenIds  []string
+		TokenUris []string
+		TokenData []string
+		Sender    string
+		Receiver  string
+		Memo      string
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		want   []byte
+	}{
+		{
+			"success",
+			fields{"classId", "classUri", "classData", []string{"id1", "id2"}, []string{"uri1", "uri2"}, []string{"data1"}, sender, receiver, "memo"},
+			[]byte(`{"classData":"classData","classId":"classId","classUri":"classUri","memo":"memo","receiver":"cosmos15mn87gny58ptfpzq0du6t398gle50xphkw2pkt","sender":"cosmos1eshqg3adwvnuqng0eqfr6ppj35j9hh6zyd9qss","tokenData":["data1"],"tokenIds":["id1","id2"],"tokenUris":["uri1","uri2"]}`),
+		},
+		{
+			"success with missing classUri",
+			fields{"classId", "", "classData", []string{"id1", "id2"}, []string{"uri1", "uri2"}, []string{"data1"}, sender, receiver, "memo"},
+			[]byte(`{"classData":"classData","classId":"classId","memo":"memo","receiver":"cosmos15mn87gny58ptfpzq0du6t398gle50xphkw2pkt","sender":"cosmos1eshqg3adwvnuqng0eqfr6ppj35j9hh6zyd9qss","tokenData":["data1"],"tokenIds":["id1","id2"],"tokenUris":["uri1","uri2"]}`),
+		},
+		{
+			"success with missing classData",
+			fields{"classId", "classUri", "", []string{"id1", "id2"}, []string{"uri1", "uri2"}, []string{"data1"}, sender, receiver, "memo"},
+			[]byte(`{"classId":"classId","classUri":"classUri","memo":"memo","receiver":"cosmos15mn87gny58ptfpzq0du6t398gle50xphkw2pkt","sender":"cosmos1eshqg3adwvnuqng0eqfr6ppj35j9hh6zyd9qss","tokenData":["data1"],"tokenIds":["id1","id2"],"tokenUris":["uri1","uri2"]}`),
+		},
+		{
+			"success with empty tokenUris",
+			fields{"classId", "classUri", "classData", []string{"id1", "id2"}, []string{"", ""}, []string{"data1"}, sender, receiver, "memo"},
+			[]byte(`{"classData":"classData","classId":"classId","classUri":"classUri","memo":"memo","receiver":"cosmos15mn87gny58ptfpzq0du6t398gle50xphkw2pkt","sender":"cosmos1eshqg3adwvnuqng0eqfr6ppj35j9hh6zyd9qss","tokenData":["data1"],"tokenIds":["id1","id2"`),
+		},
+		{
+			"success with nil tokenUris",
+			fields{"classId", "classUri", "classData", []string{"id1", "id2"}, nil, []string{"data1"}, sender, receiver, "memo"},
+			[]byte(`{"classData":"classData","classId":"classId","classUri":"classUri","memo":"memo","receiver":"cosmos15mn87gny58ptfpzq0du6t398gle50xphkw2pkt","sender":"cosmos1eshqg3adwvnuqng0eqfr6ppj35j9hh6zyd9qss","tokenData":["data1"],"tokenIds":["id1","id2"`),
+		},
+		{
+			"success with empty tokenData",
+			fields{"classId", "classUri", "classData", []string{"id1", "id2"}, []string{"uri1", "uri2"}, []string{"", ""}, sender, receiver, "memo"},
+			[]byte(`{"classData":"classData","classId":"classId","classUri":"classUri","memo":"memo","receiver":"cosmos15mn87gny58ptfpzq0du6t398gle50xphkw2pkt","sender":"cosmos1eshqg3adwvnuqng0eqfr6ppj35j9hh6zyd9qss","tokenData":["data1"],"tokenIds":["id1","id2"`),
+		},
+		{
+			"success with nil tokenData",
+			fields{"classId", "classUri", "classData", []string{"id1", "id2"}, []string{"uri1", "uri2"}, nil, sender, receiver, "memo"},
+			[]byte(`{"classData":"classData","classId":"classId","classUri":"classUri","memo":"memo","receiver":"cosmos15mn87gny58ptfpzq0du6t398gle50xphkw2pkt","sender":"cosmos1eshqg3adwvnuqng0eqfr6ppj35j9hh6zyd9qss","tokenData":["data1"],"tokenIds":["id1","id2"`),
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			nftpd := NonFungibleTokenPacketData{
+				ClassId:   tt.fields.ClassId,
+				ClassUri:  tt.fields.ClassUri,
+				ClassData: tt.fields.ClassData,
+				TokenIds:  tt.fields.TokenIds,
+				TokenUris: tt.fields.TokenUris,
+				TokenData: tt.fields.TokenData,
+				Sender:    tt.fields.Sender,
+				Receiver:  tt.fields.Receiver,
+				Memo:      tt.fields.Memo,
+			}
+			t.Logf("%s\n", nftpd.GetBytes())
+			if got := nftpd.GetBytes(); bytes.Equal(got, tt.want) {
+				t.Errorf("NonFungibleTokenPacketData.GetBytes() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}