diff --git a/contracts/sui/libs/sui_rlp/sources/encoder.move b/contracts/sui/libs/sui_rlp/sources/encoder.move
index ea0dadff..980db768 100644
--- a/contracts/sui/libs/sui_rlp/sources/encoder.move
+++ b/contracts/sui/libs/sui_rlp/sources/encoder.move
@@ -83,6 +83,12 @@ module sui_rlp::encoder {
         let vec=vector::singleton(num);
         encode(&vec)
 
+    }
+
+     public fun encode_u32(num:u32):vector<u8>{
+        let vec= utils::to_bytes_u32(num);
+        encode(&vec)
+
     }
 
     public fun encode_u64(num:u64):vector<u8>{
@@ -126,5 +132,24 @@ module sui_rlp::encoder {
         vector<u8>[0]
     }
 
+    #[test]
+    fun test_encode_zero_value(){
+        let num=0_u128;
+        let bytes=encode_u128(num);
+        assert!(bytes==x"00");
+
+         let num=0_u64;
+        let bytes=encode_u64(num);
+        assert!(bytes==x"00");
+
+        let num=0_u32;
+        let bytes=encode_u32(num);
+        assert!(bytes==x"00");
+
+        let num=0_u8;
+        let bytes=encode_u8(num);
+        assert!(bytes==x"00");
+    }
+
    
 }
\ No newline at end of file
diff --git a/contracts/sui/libs/sui_rlp/sources/utils.move b/contracts/sui/libs/sui_rlp/sources/utils.move
index e09d9d88..f1c76eb8 100644
--- a/contracts/sui/libs/sui_rlp/sources/utils.move
+++ b/contracts/sui/libs/sui_rlp/sources/utils.move
@@ -86,8 +86,11 @@ module sui_rlp::utils {
 
             i = i + 1;
         };
-
-        result
+        if (result.length()==0){
+            vector<u8>[0]
+        }else{
+            result
+        }
     }