diff --git a/src/sonic/helped/batch.rs b/src/sonic/helped/batch.rs
index 445f7e5..17f9871 100644
--- a/src/sonic/helped/batch.rs
+++ b/src/sonic/helped/batch.rs
@@ -109,22 +109,30 @@ impl<E: Engine> Batch<E> {
         let alpha_x = multiexp(
             self.alpha_x.iter().map(|x| &x.0),
             self.alpha_x.iter().map(|x| &x.1),
-        ).into_affine().prepare();
+        ).into_affine();
+
+        let alpha_x = alpha_x.prepare();
 
         let alpha = multiexp(
             self.alpha.iter().map(|x| &x.0),
             self.alpha.iter().map(|x| &x.1),
-        ).into_affine().prepare();
+        ).into_affine();
+
+        let alpha = alpha.prepare();
 
         let neg_h = multiexp(
             self.neg_h.iter().map(|x| &x.0),
             self.neg_h.iter().map(|x| &x.1),
-        ).into_affine().prepare();
+        ).into_affine();
+
+        let neg_h = neg_h.prepare();
 
         let neg_x_n_minus_d = multiexp(
             self.neg_x_n_minus_d.iter().map(|x| &x.0),
             self.neg_x_n_minus_d.iter().map(|x| &x.1),
-        ).into_affine().prepare();
+        ).into_affine();
+
+        let neg_x_n_minus_d = neg_x_n_minus_d.prepare();
 
         E::final_exponentiation(&E::miller_loop(&[
             (&alpha_x, &self.alpha_x_precomp),
@@ -135,7 +143,7 @@ impl<E: Engine> Batch<E> {
     }
 }
 
-
+#[derive(Clone, Debug)]
 pub struct VerifyingKey<E: Engine> {
     pub alpha_x: E::G2Affine,
 
diff --git a/src/sonic/helped/mod.rs b/src/sonic/helped/mod.rs
index e555ba0..b330fed 100644
--- a/src/sonic/helped/mod.rs
+++ b/src/sonic/helped/mod.rs
@@ -16,19 +16,19 @@ pub use self::helper::{Aggregate, create_aggregate};
 pub use self::verifier::{MultiVerifier};
 pub use self::prover::{create_proof, create_advice};
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub struct SxyAdvice<E: Engine> {
-    s: E::G1Affine,
-    opening: E::G1Affine,
-    szy: E::Fr,
+    pub s: E::G1Affine,
+    pub opening: E::G1Affine,
+    pub szy: E::Fr,
 }
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub struct Proof<E: Engine> {
-    r: E::G1Affine,
-    t: E::G1Affine,
-    rz: E::Fr,
-    rzy: E::Fr,
-    z_opening: E::G1Affine,
-    zy_opening: E::G1Affine
+    pub r: E::G1Affine,
+    pub t: E::G1Affine,
+    pub rz: E::Fr,
+    pub rzy: E::Fr,
+    pub z_opening: E::G1Affine,
+    pub zy_opening: E::G1Affine
 }
\ No newline at end of file
diff --git a/src/sonic/transcript/mod.rs b/src/sonic/transcript/mod.rs
index bede612..fc5035f 100644
--- a/src/sonic/transcript/mod.rs
+++ b/src/sonic/transcript/mod.rs
@@ -58,7 +58,7 @@ impl<H: Hasher> RollingHashTranscript<H> {
     }
 
     pub fn commit_bytes(&mut self, personalization: &[u8], bytes: &[u8]) {
-        let mut h = H::new(personalization);
+        let mut h = H::new(&[]);
         h.update(&self.buffer);
         h.update(personalization);
         h.update(bytes);
@@ -101,7 +101,6 @@ impl<H:Hasher> TranscriptProtocol for RollingHashTranscript<H> {
 
     fn get_challenge_scalar<F: PrimeField>(&mut self) -> F {
         use byteorder::ByteOrder;
-
         let mut nonce = 0u32;
         loop {
             let mut nonce_bytes = vec![0u8; 4];
@@ -111,6 +110,7 @@ impl<H:Hasher> TranscriptProtocol for RollingHashTranscript<H> {
             repr.read_be(&challenge_bytes[..]).unwrap();
 
             if let Ok(result) = F::from_repr(repr) {
+                // println!("Got a challenge {} for nonce = {}", result, nonce);
                 return result;
             }
             if nonce == (0xffffffff as u32) {