diff --git a/src/lib.rs b/src/lib.rs
index e7e36ee0..814f9d8e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -571,18 +571,28 @@ where
   S1: RelaxedR1CSSNARKTrait<G1>,
   S2: RelaxedR1CSSNARKTrait<G2>,
 {
-  r_U_primary: RelaxedR1CSInstance<G1>,
-  l_u_primary: R1CSInstance<G1>,
-  nifs_primary: NIFS<G1>,
-  f_W_snark_primary: S1,
-
-  r_U_secondary: RelaxedR1CSInstance<G2>,
-  l_u_secondary: R1CSInstance<G2>,
-  nifs_secondary: NIFS<G2>,
-  f_W_snark_secondary: S2,
-
-  zn_primary: Vec<G1::Scalar>,
-  zn_secondary: Vec<G2::Scalar>,
+  /// r_U_primary
+  pub r_U_primary: RelaxedR1CSInstance<G1>,
+  /// l_u_primary
+  pub l_u_primary: R1CSInstance<G1>,
+  /// nifs_primary
+  pub nifs_primary: NIFS<G1>,
+  /// f_W_snark_primary
+  pub f_W_snark_primary: S1,
+
+  /// r_U_secondary
+  pub r_U_secondary: RelaxedR1CSInstance<G2>,
+  /// l_u_secondary
+  pub l_u_secondary: R1CSInstance<G2>,
+  /// nifs_secondary
+  pub nifs_secondary: NIFS<G2>,
+  /// f_W_snark_secondary
+  pub f_W_snark_secondary: S2,
+
+  /// zn primary
+  pub zn_primary: Vec<G1::Scalar>,
+  /// zn secondary
+  pub zn_secondary: Vec<G2::Scalar>,
 
   _p_c1: PhantomData<C1>,
   _p_c2: PhantomData<C2>,
diff --git a/src/provider/hyrax_pc.rs b/src/provider/hyrax_pc.rs
index 71c46615..5d80ef90 100644
--- a/src/provider/hyrax_pc.rs
+++ b/src/provider/hyrax_pc.rs
@@ -34,8 +34,10 @@ pub struct PolyCommit<G: Group> {
 
 /// Hyrax PC generators and functions to commit and prove evaluation
 pub struct HyraxPC<G: Group> {
-  gens_v: CommitmentGens<G>, // generator for vectors
-  gens_s: CommitmentGens<G>, // generator for scalars (eval)
+  /// generator for vectors
+  pub gens_v: CommitmentGens<G>, // generator for vectors
+  /// generator for scalars (eval)
+  pub gens_s: CommitmentGens<G>, // generator for scalars (eval)
 }
 
 impl<G: Group> AppendToTranscriptTrait for PolyCommit<G> {
diff --git a/src/provider/pedersen.rs b/src/provider/pedersen.rs
index 4b37fc26..c3c4a5b9 100644
--- a/src/provider/pedersen.rs
+++ b/src/provider/pedersen.rs
@@ -21,8 +21,10 @@ use serde::{Deserialize, Serialize};
 /// A type that holds commitment generators
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct CommitmentGens<G: Group> {
-  gens: Vec<G::PreprocessedGroupElement>,
-  h: G::PreprocessedGroupElement,
+  /// generator vec  
+  pub gens: Vec<G::PreprocessedGroupElement>,
+  /// temporary public for debug
+  pub h: G::PreprocessedGroupElement,
   _p: PhantomData<G>,
 }
 
@@ -30,7 +32,8 @@ pub struct CommitmentGens<G: Group> {
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
 #[serde(bound = "")]
 pub struct Commitment<G: Group> {
-  pub(crate) comm: G,
+  /// commitment elt
+  pub comm: G,
 }
 
 /// A type that holds a compressed commitment
diff --git a/src/spartan/direct.rs b/src/spartan/direct.rs
index a5e11e6c..4464fce8 100644
--- a/src/spartan/direct.rs
+++ b/src/spartan/direct.rs
@@ -69,7 +69,8 @@ where
 {
   gens: R1CSGens<G>,
   S: R1CSShape<G>,
-  pk: ProverKey<G, EE>,
+  /// pk
+  pub pk: ProverKey<G, EE>,
 }
 
 /// A type that holds Spartan's verifier's key
diff --git a/src/spartan/mod.rs b/src/spartan/mod.rs
index a3dba8ac..b0d83bec 100644
--- a/src/spartan/mod.rs
+++ b/src/spartan/mod.rs
@@ -1,7 +1,7 @@
 //! This module implements RelaxedR1CSSNARKTrait and CAPRelaxedR1CSSNARKTrait using Spartan that is generic
 //! over the polynomial commitment and evaluation argument (i.e., a PCS)
 pub mod direct;
-mod nizk;
+pub mod nizk;
 pub mod polynomial;
 mod sumcheck;
 
@@ -61,7 +61,8 @@ impl<G: Group> SumcheckGens<G> {
 #[derive(Serialize, Deserialize)]
 #[serde(bound = "")]
 pub struct ProverKey<G: Group, EE: EvaluationEngineTrait<G, CE = G::CE>> {
-  gens: EE::EvaluationGens,
+  /// gens
+  pub gens: EE::EvaluationGens,
   sumcheck_gens: SumcheckGens<G>,
   S: R1CSShape<G>,
 }
diff --git a/src/spartan/nizk.rs b/src/spartan/nizk.rs
index cd230b40..0db10446 100644
--- a/src/spartan/nizk.rs
+++ b/src/spartan/nizk.rs
@@ -1,3 +1,4 @@
+//! This module defines nizk proofs
 #![allow(clippy::too_many_arguments)]
 #![allow(clippy::type_complexity)]
 use crate::errors::NovaError;
@@ -13,6 +14,7 @@ use merlin::Transcript;
 use rand::rngs::OsRng;
 use serde::{Deserialize, Serialize};
 
+/// KnowledgeProof
 #[derive(Debug, Serialize, Deserialize)]
 #[serde(bound = "")]
 pub struct KnowledgeProof<G: Group> {
@@ -21,13 +23,17 @@ pub struct KnowledgeProof<G: Group> {
   z2: G::Scalar,
 }
 
+/// EqualityProof
 #[derive(Debug, Serialize, Deserialize)]
 #[serde(bound = "")]
 pub struct EqualityProof<G: Group> {
-  alpha: CompressedCommitment<G>,
-  z: G::Scalar,
+  /// alpha
+  pub alpha: CompressedCommitment<G>,
+  /// z
+  pub z: G::Scalar,
 }
 
+/// ProductProof
 #[derive(Debug, Serialize, Deserialize)]
 #[serde(bound = "")]
 pub struct ProductProof<G: Group> {
@@ -37,6 +43,7 @@ pub struct ProductProof<G: Group> {
   z: [G::Scalar; 5],
 }
 
+/// DocProductProof
 #[derive(Debug, Serialize, Deserialize)]
 #[serde(bound = "")]
 pub struct DotProductProof<G: Group> {
@@ -47,11 +54,13 @@ pub struct DotProductProof<G: Group> {
   z_beta: G::Scalar,
 }
 
+/// KnowledgeProof
 impl<G: Group> KnowledgeProof<G> {
   fn protocol_name() -> &'static [u8] {
     b"knowledge proof"
   }
 
+  /// prove
   pub fn prove(
     gens_n: &CommitmentGens<G>,
     transcript: &mut Transcript,
@@ -78,6 +87,7 @@ impl<G: Group> KnowledgeProof<G> {
     Ok((Self { alpha, z1, z2 }, C))
   }
 
+  /// verify
   pub fn verify(
     &self,
     gens_n: &CommitmentGens<G>,
@@ -101,11 +111,14 @@ impl<G: Group> KnowledgeProof<G> {
   }
 }
 
+/// EqualityProof
 impl<G: Group> EqualityProof<G> {
-  fn protocol_name() -> &'static [u8] {
+  /// protocol name
+  pub fn protocol_name() -> &'static [u8] {
     b"equality proof"
   }
 
+  /// prove
   pub fn prove(
     gens_n: &CommitmentGens<G>,
     transcript: &mut Transcript,
@@ -142,6 +155,7 @@ impl<G: Group> EqualityProof<G> {
     Ok((Self { alpha, z }, C1, C2))
   }
 
+  /// verify
   pub fn verify(
     &self,
     gens_n: &CommitmentGens<G>,
@@ -171,11 +185,14 @@ impl<G: Group> EqualityProof<G> {
   }
 }
 
+/// product proof
 impl<G: Group> ProductProof<G> {
+  /// protocol name
   fn protocol_name() -> &'static [u8] {
     b"product proof"
   }
 
+  /// prove
   pub fn prove(
     gens_n: &CommitmentGens<G>,
     transcript: &mut Transcript,
@@ -247,6 +264,7 @@ impl<G: Group> ProductProof<G> {
     ))
   }
 
+  /// check_equality
   fn check_equality(
     P: &CompressedCommitment<G>,
     X: &CompressedCommitment<G>,
@@ -261,6 +279,7 @@ impl<G: Group> ProductProof<G> {
     Ok(lhs == rhs)
   }
 
+  /// verify
   pub fn verify(
     &self,
     gens_n: &CommitmentGens<G>,
@@ -305,11 +324,14 @@ impl<G: Group> ProductProof<G> {
   }
 }
 
+/// DotProductProof
 impl<G: Group> DotProductProof<G> {
+  /// protocol name
   pub fn protocol_name() -> &'static [u8] {
     b"dot product proof"
   }
 
+  /// comppute dot product
   pub fn compute_dotproduct(a: &[G::Scalar], b: &[G::Scalar]) -> G::Scalar {
     assert_eq!(a.len(), b.len());
     let mut result = G::Scalar::zero();
@@ -321,6 +343,7 @@ impl<G: Group> DotProductProof<G> {
     result
   }
 
+  /// prove
   pub fn prove(
     gens_1: &CommitmentGens<G>, // generator of size 1
     gens_n: &CommitmentGens<G>, // generators of size n
@@ -384,6 +407,7 @@ impl<G: Group> DotProductProof<G> {
     )
   }
 
+  /// verify
   pub fn verify(
     &self,
     gens_1: &CommitmentGens<G>, // generator of size 1
diff --git a/src/spartan/polynomial.rs b/src/spartan/polynomial.rs
index 5e0b53b1..19a9f9db 100644
--- a/src/spartan/polynomial.rs
+++ b/src/spartan/polynomial.rs
@@ -3,7 +3,8 @@ use core::ops::Index;
 use ff::PrimeField;
 use rayon::prelude::*;
 
-pub(crate) struct EqPolynomial<Scalar: PrimeField> {
+/// Polynomial struct
+pub struct EqPolynomial<Scalar: PrimeField> {
   r: Vec<Scalar>,
 }
 
@@ -21,6 +22,7 @@ impl<Scalar: PrimeField> EqPolynomial<Scalar> {
       .fold(Scalar::one(), |acc, item| acc * item)
   }
 
+  /// evals
   pub fn evals(&self) -> Vec<Scalar> {
     let ell = self.r.len();
     let mut evals: Vec<Scalar> = vec![Scalar::zero(); (2_usize).pow(ell as u32)];
@@ -44,10 +46,12 @@ impl<Scalar: PrimeField> EqPolynomial<Scalar> {
     evals
   }
 
+  /// factored lens
   pub fn compute_factored_lens(ell: usize) -> (usize, usize) {
     (ell / 2, ell - ell / 2)
   }
 
+  /// factored evals
   pub fn compute_factored_evals(&self) -> (Vec<Scalar>, Vec<Scalar>) {
     let ell = self.r.len();
     let (left_num_vars, _right_num_vars) = EqPolynomial::<Scalar>::compute_factored_lens(ell);