diff --git a/arbitrator/prover/src/kzgbn254.rs b/arbitrator/prover/src/kzgbn254.rs
index d56ad8539..a488ad1a2 100644
--- a/arbitrator/prover/src/kzgbn254.rs
+++ b/arbitrator/prover/src/kzgbn254.rs
@@ -45,12 +45,11 @@ pub fn prove_kzg_preimage_bn254(
         blob.to_polynomial(PolynomialFormat::InCoefficientForm)?;
     let blob_commitment = kzg.commit(&blob_polynomial_evaluation_form)?;
 
-
     let commitment_x_bigint: BigUint = blob_commitment.x.into();
     let commitment_y_bigint: BigUint = blob_commitment.y.into();
     let length_bigint: BigUint = blob.len().into();
 
-    let mut commitment_encoded_length_bytes = Vec::with_capacity(69);
+    let mut commitment_encoded_length_bytes = Vec::with_capacity(68);
     append_left_padded_biguint_be(&mut commitment_encoded_length_bytes, &commitment_x_bigint);
     append_left_padded_biguint_be(&mut commitment_encoded_length_bytes, &commitment_y_bigint);
     append_left_padded_biguint_be(&mut commitment_encoded_length_bytes, &length_bigint);
diff --git a/arbitrator/prover/src/lib.rs b/arbitrator/prover/src/lib.rs
index 379dc4268..fa6c46c20 100644
--- a/arbitrator/prover/src/lib.rs
+++ b/arbitrator/prover/src/lib.rs
@@ -362,6 +362,14 @@ unsafe fn handle_preimage_resolution(
     Some(data)
 }
 
+#[no_mangle]
+pub unsafe extern "C" fn arbitrator_get_opcode(mach: *mut Machine) -> u16 {
+    match (*mach).get_next_instruction() {
+        Some(instruction) => return instruction.opcode.repr(),
+        None => panic!("Failed to get next opcode for Machine"),
+    }
+}
+
 #[no_mangle]
 #[cfg(feature = "native")]
 pub unsafe extern "C" fn arbitrator_set_preimage_resolver(
diff --git a/arbitrator/prover/src/utils.rs b/arbitrator/prover/src/utils.rs
index 68bc0ba31..7d9b6d3fb 100644
--- a/arbitrator/prover/src/utils.rs
+++ b/arbitrator/prover/src/utils.rs
@@ -237,10 +237,15 @@ pub fn hash_preimage(preimage: &[u8], ty: PreimageType) -> Result<[u8; 32]> {
             // 25 bits for length considering 32mb blobs padded to nearest power of 2 (2^25)
             // pad to 32 bits or 4 bytes so 68 bytes total
             let mut commitment_length_encoded_bytes = Vec::with_capacity(68);
-            append_left_padded_biguint_be(&mut commitment_length_encoded_bytes, &commitment_x_bigint);
-            append_left_padded_biguint_be(&mut commitment_length_encoded_bytes, &commitment_y_bigint);
+            append_left_padded_biguint_be(
+                &mut commitment_length_encoded_bytes,
+                &commitment_x_bigint,
+            );
+            append_left_padded_biguint_be(
+                &mut commitment_length_encoded_bytes,
+                &commitment_y_bigint,
+            );
             append_left_padded_biguint_be(&mut commitment_length_encoded_bytes, &length_bigint);
-            
 
             let mut keccak256_hasher = Keccak256::new();
             keccak256_hasher.update(&commitment_length_encoded_bytes);