diff --git a/cl/src/input.rs b/cl/src/input.rs
index bef23fd..afc3075 100644
--- a/cl/src/input.rs
+++ b/cl/src/input.rs
@@ -20,7 +20,7 @@ pub struct Input {
     pub balance: Balance,
 }
 
-#[derive(Debug, PartialEq, Eq, Clone)]
+#[derive(Debug, PartialEq, Eq, Clone, Serialize, Deserialize)]
 pub struct InputWitness {
     pub note: NoteWitness,
     pub nf_sk: NullifierSecret,
@@ -105,7 +105,7 @@ impl Input {
             && death_constraint_is_satisfied
     }
 
-    pub(crate) fn to_bytes(&self) -> [u8; 96] {
+    pub fn to_bytes(&self) -> [u8; 96] {
         let mut bytes = [0u8; 96];
         bytes[..32].copy_from_slice(self.note_comm.as_bytes());
         bytes[32..64].copy_from_slice(self.nullifier.as_bytes());
diff --git a/cl/src/nullifier.rs b/cl/src/nullifier.rs
index b5567f9..02d097a 100644
--- a/cl/src/nullifier.rs
+++ b/cl/src/nullifier.rs
@@ -10,19 +10,19 @@ use rand_core::RngCore;
 use serde::{Deserialize, Serialize};
 
 // Maintained privately by note holder
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
 pub struct NullifierSecret([u8; 16]);
 
 // Nullifier commitment is public information that
 // can be provided to anyone wishing to transfer
 // you a note
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
 pub struct NullifierCommitment([u8; 32]);
 
 // To allow users to maintain fewer nullifier secrets, we
 // provide a nonce to differentiate notes controlled by the same
 // secret. Each note is assigned a unique nullifier nonce.
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
 pub struct NullifierNonce([u8; 16]);
 
 // The nullifier attached to input notes to prove an input has not
diff --git a/cl/src/output.rs b/cl/src/output.rs
index cbcb2bc..f25c609 100644
--- a/cl/src/output.rs
+++ b/cl/src/output.rs
@@ -14,7 +14,7 @@ pub struct Output {
     pub balance: Balance,
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct OutputWitness {
     pub note: NoteWitness,
     pub nf_pk: NullifierCommitment,
@@ -61,7 +61,7 @@ impl Output {
             && self.balance == witness.note.balance()
     }
 
-    pub(crate) fn to_bytes(&self) -> [u8; 64] {
+    pub fn to_bytes(&self) -> [u8; 64] {
         let mut bytes = [0u8; 64];
         bytes[..32].copy_from_slice(self.note_comm.as_bytes());
         bytes[32..64].copy_from_slice(&self.balance.to_bytes());
diff --git a/cl/src/partial_tx.rs b/cl/src/partial_tx.rs
index 3c56f7f..c08cb24 100644
--- a/cl/src/partial_tx.rs
+++ b/cl/src/partial_tx.rs
@@ -16,7 +16,7 @@ const MAX_OUTPUTS: usize = 32;
 /// The partial transaction commitment couples an input to a partial transaction.
 /// Prevents partial tx unbundling.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
-pub struct PtxRoot([u8; 32]);
+pub struct PtxRoot(pub [u8; 32]);
 
 impl PtxRoot {
     pub fn random(mut rng: impl RngCore) -> Self {